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notepad-plus-plus/scintilla/win32/PlatWin.cxx

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// Scintilla source code edit control
/** @file PlatWin.cxx
** Implementation of platform facilities on Windows.
**/
// Copyright 1998-2003 by Neil Hodgson <neilh@scintilla.org>
// The License.txt file describes the conditions under which this software may be distributed.
#include <cstddef>
#include <cstdlib>
#include <cstring>
#include <cstdio>
#include <cstdarg>
#include <ctime>
#include <cmath>
#include <climits>
#include <string_view>
#include <vector>
#include <map>
#include <optional>
#include <algorithm>
#include <iterator>
#include <memory>
#include <mutex>
// Want to use std::min and std::max so don't want Windows.h version of min and max
#if !defined(NOMINMAX)
#define NOMINMAX
#endif
#undef _WIN32_WINNT
#define _WIN32_WINNT 0x0A00
#undef WINVER
#define WINVER 0x0A00
#define WIN32_LEAN_AND_MEAN 1
#include <windows.h>
#include <commctrl.h>
#include <richedit.h>
#include <windowsx.h>
#include <shellscalingapi.h>
#if !defined(DISABLE_D2D)
#define USE_D2D 1
#endif
#if defined(USE_D2D)
#include <d2d1.h>
#include <dwrite.h>
#endif
#include "ScintillaTypes.h"
#include "Debugging.h"
#include "Geometry.h"
#include "Platform.h"
#include "XPM.h"
#include "UniConversion.h"
#include "DBCS.h"
#include "WinTypes.h"
#include "PlatWin.h"
// __uuidof is a Microsoft extension but makes COM code neater, so disable warning
#if defined(__clang__)
#pragma clang diagnostic ignored "-Wlanguage-extension-token"
#endif
using namespace Scintilla;
namespace Scintilla::Internal {
UINT CodePageFromCharSet(CharacterSet characterSet, UINT documentCodePage) noexcept;
#if defined(USE_D2D)
IDWriteFactory *pIDWriteFactory = nullptr;
ID2D1Factory *pD2DFactory = nullptr;
D2D1_DRAW_TEXT_OPTIONS d2dDrawTextOptions = D2D1_DRAW_TEXT_OPTIONS_NONE;
static HMODULE hDLLD2D {};
static HMODULE hDLLDWrite {};
void LoadD2DOnce() noexcept {
DWORD loadLibraryFlags = 0;
HMODULE kernel32 = ::GetModuleHandleW(L"kernel32.dll");
if (kernel32) {
if (::GetProcAddress(kernel32, "SetDefaultDllDirectories")) {
// Availability of SetDefaultDllDirectories implies Windows 8+ or
// that KB2533623 has been installed so LoadLibraryEx can be called
// with LOAD_LIBRARY_SEARCH_SYSTEM32.
loadLibraryFlags = LOAD_LIBRARY_SEARCH_SYSTEM32;
}
}
typedef HRESULT (WINAPI *D2D1CFSig)(D2D1_FACTORY_TYPE factoryType, REFIID riid,
CONST D2D1_FACTORY_OPTIONS *pFactoryOptions, IUnknown **factory);
typedef HRESULT (WINAPI *DWriteCFSig)(DWRITE_FACTORY_TYPE factoryType, REFIID iid,
IUnknown **factory);
hDLLD2D = ::LoadLibraryEx(TEXT("D2D1.DLL"), 0, loadLibraryFlags);
D2D1CFSig fnD2DCF = DLLFunction<D2D1CFSig>(hDLLD2D, "D2D1CreateFactory");
if (fnD2DCF) {
// A single threaded factory as Scintilla always draw on the GUI thread
fnD2DCF(D2D1_FACTORY_TYPE_SINGLE_THREADED,
__uuidof(ID2D1Factory),
nullptr,
reinterpret_cast<IUnknown**>(&pD2DFactory));
}
hDLLDWrite = ::LoadLibraryEx(TEXT("DWRITE.DLL"), 0, loadLibraryFlags);
DWriteCFSig fnDWCF = DLLFunction<DWriteCFSig>(hDLLDWrite, "DWriteCreateFactory");
if (fnDWCF) {
const GUID IID_IDWriteFactory2 = // 0439fc60-ca44-4994-8dee-3a9af7b732ec
{ 0x0439fc60, 0xca44, 0x4994, { 0x8d, 0xee, 0x3a, 0x9a, 0xf7, 0xb7, 0x32, 0xec } };
const HRESULT hr = fnDWCF(DWRITE_FACTORY_TYPE_SHARED,
IID_IDWriteFactory2,
reinterpret_cast<IUnknown**>(&pIDWriteFactory));
if (SUCCEEDED(hr)) {
// D2D1_DRAW_TEXT_OPTIONS_ENABLE_COLOR_FONT
d2dDrawTextOptions = static_cast<D2D1_DRAW_TEXT_OPTIONS>(0x00000004);
} else {
fnDWCF(DWRITE_FACTORY_TYPE_SHARED,
__uuidof(IDWriteFactory),
reinterpret_cast<IUnknown**>(&pIDWriteFactory));
}
}
}
bool LoadD2D() {
static std::once_flag once;
std::call_once(once, LoadD2DOnce);
return pIDWriteFactory && pD2DFactory;
}
#endif
void *PointerFromWindow(HWND hWnd) noexcept {
return reinterpret_cast<void *>(::GetWindowLongPtr(hWnd, 0));
}
void SetWindowPointer(HWND hWnd, void *ptr) noexcept {
::SetWindowLongPtr(hWnd, 0, reinterpret_cast<LONG_PTR>(ptr));
}
namespace {
// system DPI, same for all monitor.
UINT uSystemDPI = USER_DEFAULT_SCREEN_DPI;
using GetDpiForWindowSig = UINT(WINAPI *)(HWND hwnd);
GetDpiForWindowSig fnGetDpiForWindow = nullptr;
HMODULE hDLLShcore {};
using GetDpiForMonitorSig = HRESULT (WINAPI *)(HMONITOR hmonitor, /*MONITOR_DPI_TYPE*/int dpiType, UINT *dpiX, UINT *dpiY);
GetDpiForMonitorSig fnGetDpiForMonitor = nullptr;
using GetSystemMetricsForDpiSig = int(WINAPI *)(int nIndex, UINT dpi);
GetSystemMetricsForDpiSig fnGetSystemMetricsForDpi = nullptr;
using AdjustWindowRectExForDpiSig = BOOL(WINAPI *)(LPRECT lpRect, DWORD dwStyle, BOOL bMenu, DWORD dwExStyle, UINT dpi);
AdjustWindowRectExForDpiSig fnAdjustWindowRectExForDpi = nullptr;
using AreDpiAwarenessContextsEqualSig = BOOL(WINAPI *)(DPI_AWARENESS_CONTEXT, DPI_AWARENESS_CONTEXT);
AreDpiAwarenessContextsEqualSig fnAreDpiAwarenessContextsEqual = nullptr;
using GetWindowDpiAwarenessContextSig = DPI_AWARENESS_CONTEXT(WINAPI *)(HWND);
GetWindowDpiAwarenessContextSig fnGetWindowDpiAwarenessContext = nullptr;
using GetScaleFactorForMonitorSig = HRESULT(WINAPI *)(HMONITOR, DEVICE_SCALE_FACTOR *);
GetScaleFactorForMonitorSig fnGetScaleFactorForMonitor = nullptr;
using SetThreadDpiAwarenessContextSig = DPI_AWARENESS_CONTEXT(WINAPI *)(DPI_AWARENESS_CONTEXT);
SetThreadDpiAwarenessContextSig fnSetThreadDpiAwarenessContext = nullptr;
void LoadDpiForWindow() noexcept {
HMODULE user32 = ::GetModuleHandleW(L"user32.dll");
fnGetDpiForWindow = DLLFunction<GetDpiForWindowSig>(user32, "GetDpiForWindow");
fnGetSystemMetricsForDpi = DLLFunction<GetSystemMetricsForDpiSig>(user32, "GetSystemMetricsForDpi");
fnAdjustWindowRectExForDpi = DLLFunction<AdjustWindowRectExForDpiSig>(user32, "AdjustWindowRectExForDpi");
fnSetThreadDpiAwarenessContext = DLLFunction<SetThreadDpiAwarenessContextSig>(user32, "SetThreadDpiAwarenessContext");
using GetDpiForSystemSig = UINT(WINAPI *)(void);
GetDpiForSystemSig fnGetDpiForSystem = DLLFunction<GetDpiForSystemSig>(user32, "GetDpiForSystem");
if (fnGetDpiForSystem) {
uSystemDPI = fnGetDpiForSystem();
} else {
HDC hdcMeasure = ::CreateCompatibleDC({});
uSystemDPI = ::GetDeviceCaps(hdcMeasure, LOGPIXELSY);
::DeleteDC(hdcMeasure);
}
fnGetWindowDpiAwarenessContext = DLLFunction<GetWindowDpiAwarenessContextSig>(user32, "GetWindowDpiAwarenessContext");
fnAreDpiAwarenessContextsEqual = DLLFunction<AreDpiAwarenessContextsEqualSig>(user32, "AreDpiAwarenessContextsEqual");
hDLLShcore = ::LoadLibraryExW(L"shcore.dll", {}, LOAD_LIBRARY_SEARCH_SYSTEM32);
if (hDLLShcore) {
fnGetScaleFactorForMonitor = DLLFunction<GetScaleFactorForMonitorSig>(hDLLShcore, "GetScaleFactorForMonitor");
fnGetDpiForMonitor = DLLFunction<GetDpiForMonitorSig>(hDLLShcore, "GetDpiForMonitor");
}
}
HINSTANCE hinstPlatformRes {};
constexpr Supports SupportsGDI[] = {
Supports::PixelModification,
};
constexpr BYTE Win32MapFontQuality(FontQuality extraFontFlag) noexcept {
switch (extraFontFlag & FontQuality::QualityMask) {
case FontQuality::QualityNonAntialiased:
return NONANTIALIASED_QUALITY;
case FontQuality::QualityAntialiased:
return ANTIALIASED_QUALITY;
case FontQuality::QualityLcdOptimized:
return CLEARTYPE_QUALITY;
default:
return DEFAULT_QUALITY;
}
}
#if defined(USE_D2D)
constexpr D2D1_TEXT_ANTIALIAS_MODE DWriteMapFontQuality(FontQuality extraFontFlag) noexcept {
switch (extraFontFlag & FontQuality::QualityMask) {
case FontQuality::QualityNonAntialiased:
return D2D1_TEXT_ANTIALIAS_MODE_ALIASED;
case FontQuality::QualityAntialiased:
return D2D1_TEXT_ANTIALIAS_MODE_GRAYSCALE;
case FontQuality::QualityLcdOptimized:
return D2D1_TEXT_ANTIALIAS_MODE_CLEARTYPE;
default:
return D2D1_TEXT_ANTIALIAS_MODE_DEFAULT;
}
}
#endif
// Both GDI and DirectWrite can produce a HFONT for use in list boxes
struct FontWin : public Font {
virtual HFONT HFont() const noexcept = 0;
};
void SetLogFont(LOGFONTW &lf, const char *faceName, CharacterSet characterSet, XYPOSITION size, FontWeight weight, bool italic, FontQuality extraFontFlag) {
lf = LOGFONTW();
// The negative is to allow for leading
lf.lfHeight = -(std::abs(std::lround(size)));
lf.lfWeight = static_cast<LONG>(weight);
lf.lfItalic = italic ? 1 : 0;
lf.lfCharSet = static_cast<BYTE>(characterSet);
lf.lfQuality = Win32MapFontQuality(extraFontFlag);
UTF16FromUTF8(faceName, lf.lfFaceName, LF_FACESIZE);
}
struct FontGDI : public FontWin {
HFONT hfont = {};
FontGDI(const FontParameters &fp) {
LOGFONTW lf;
SetLogFont(lf, fp.faceName, fp.characterSet, fp.size, fp.weight, fp.italic, fp.extraFontFlag);
hfont = ::CreateFontIndirectW(&lf);
}
// Deleted so FontGDI objects can not be copied.
FontGDI(const FontGDI &) = delete;
FontGDI(FontGDI &&) = delete;
FontGDI &operator=(const FontGDI &) = delete;
FontGDI &operator=(FontGDI &&) = delete;
~FontGDI() noexcept override {
if (hfont)
::DeleteObject(hfont);
}
HFONT HFont() const noexcept override {
// Duplicating hfont
LOGFONTW lf = {};
if (0 == ::GetObjectW(hfont, sizeof(lf), &lf)) {
return {};
}
return ::CreateFontIndirectW(&lf);
}
};
#if defined(USE_D2D)
struct FontDirectWrite : public FontWin {
IDWriteTextFormat *pTextFormat = nullptr;
FontQuality extraFontFlag = FontQuality::QualityDefault;
CharacterSet characterSet = CharacterSet::Ansi;
FLOAT yAscent = 2.0f;
FLOAT yDescent = 1.0f;
FLOAT yInternalLeading = 0.0f;
FontDirectWrite(const FontParameters &fp) :
extraFontFlag(fp.extraFontFlag),
characterSet(fp.characterSet) {
const std::wstring wsFace = WStringFromUTF8(fp.faceName);
const std::wstring wsLocale = WStringFromUTF8(fp.localeName);
const FLOAT fHeight = static_cast<FLOAT>(fp.size);
const DWRITE_FONT_STYLE style = fp.italic ? DWRITE_FONT_STYLE_ITALIC : DWRITE_FONT_STYLE_NORMAL;
HRESULT hr = pIDWriteFactory->CreateTextFormat(wsFace.c_str(), nullptr,
static_cast<DWRITE_FONT_WEIGHT>(fp.weight),
style,
DWRITE_FONT_STRETCH_NORMAL, fHeight, wsLocale.c_str(), &pTextFormat);
if (hr == E_INVALIDARG) {
// Possibly a bad locale name like "/" so try "en-us".
hr = pIDWriteFactory->CreateTextFormat(wsFace.c_str(), nullptr,
static_cast<DWRITE_FONT_WEIGHT>(fp.weight),
style,
DWRITE_FONT_STRETCH_NORMAL, fHeight, L"en-us", &pTextFormat);
}
if (SUCCEEDED(hr)) {
pTextFormat->SetWordWrapping(DWRITE_WORD_WRAPPING_NO_WRAP);
IDWriteTextLayout *pTextLayout = nullptr;
hr = pIDWriteFactory->CreateTextLayout(L"X", 1, pTextFormat,
100.0f, 100.0f, &pTextLayout);
if (SUCCEEDED(hr) && pTextLayout) {
constexpr int maxLines = 2;
DWRITE_LINE_METRICS lineMetrics[maxLines]{};
UINT32 lineCount = 0;
hr = pTextLayout->GetLineMetrics(lineMetrics, maxLines, &lineCount);
if (SUCCEEDED(hr)) {
yAscent = lineMetrics[0].baseline;
yDescent = lineMetrics[0].height - lineMetrics[0].baseline;
FLOAT emHeight;
hr = pTextLayout->GetFontSize(0, &emHeight);
if (SUCCEEDED(hr)) {
yInternalLeading = lineMetrics[0].height - emHeight;
}
}
ReleaseUnknown(pTextLayout);
pTextFormat->SetLineSpacing(DWRITE_LINE_SPACING_METHOD_UNIFORM, lineMetrics[0].height, lineMetrics[0].baseline);
}
}
}
// Deleted so FontDirectWrite objects can not be copied.
FontDirectWrite(const FontDirectWrite &) = delete;
FontDirectWrite(FontDirectWrite &&) = delete;
FontDirectWrite &operator=(const FontDirectWrite &) = delete;
FontDirectWrite &operator=(FontDirectWrite &&) = delete;
~FontDirectWrite() noexcept override {
ReleaseUnknown(pTextFormat);
}
HFONT HFont() const noexcept override {
LOGFONTW lf = {};
const HRESULT hr = pTextFormat->GetFontFamilyName(lf.lfFaceName, LF_FACESIZE);
if (!SUCCEEDED(hr)) {
return {};
}
lf.lfWeight = pTextFormat->GetFontWeight();
lf.lfItalic = pTextFormat->GetFontStyle() == DWRITE_FONT_STYLE_ITALIC;
lf.lfHeight = -static_cast<int>(pTextFormat->GetFontSize());
return ::CreateFontIndirectW(&lf);
}
int CodePageText(int codePage) const noexcept {
if (!(codePage == CpUtf8) && (characterSet != CharacterSet::Ansi)) {
codePage = CodePageFromCharSet(characterSet, codePage);
}
return codePage;
}
static const FontDirectWrite *Cast(const Font *font_) {
const FontDirectWrite *pfm = dynamic_cast<const FontDirectWrite *>(font_);
PLATFORM_ASSERT(pfm);
if (!pfm) {
throw std::runtime_error("SurfaceD2D::SetFont: wrong Font type.");
}
return pfm;
}
};
#endif
}
HMONITOR MonitorFromWindowHandleScaling(HWND hWnd) noexcept {
constexpr DWORD monitorFlags = MONITOR_DEFAULTTONEAREST;
if (!fnSetThreadDpiAwarenessContext) {
return ::MonitorFromWindow(hWnd, monitorFlags);
}
// Temporarily switching to PerMonitorV2 to retrieve correct monitor via MonitorFromRect() in case of active GDI scaling.
const DPI_AWARENESS_CONTEXT oldContext = fnSetThreadDpiAwarenessContext(DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2);
PLATFORM_ASSERT(oldContext != nullptr);
RECT rect;
::GetWindowRect(hWnd, &rect);
const HMONITOR monitor = ::MonitorFromRect(&rect, monitorFlags);
fnSetThreadDpiAwarenessContext(oldContext);
return monitor;
}
int GetDeviceScaleFactorWhenGdiScalingActive(HWND hWnd) noexcept {
if (fnAreDpiAwarenessContextsEqual) {
PLATFORM_ASSERT(fnGetWindowDpiAwarenessContext && fnGetScaleFactorForMonitor);
if (fnAreDpiAwarenessContextsEqual(DPI_AWARENESS_CONTEXT_UNAWARE_GDISCALED, fnGetWindowDpiAwarenessContext(hWnd))) {
const HWND hRootWnd = ::GetAncestor(hWnd, GA_ROOT); // Scale factor applies to entire (root) window.
const HMONITOR hMonitor = MonitorFromWindowHandleScaling(hRootWnd);
DEVICE_SCALE_FACTOR deviceScaleFactor;
if (S_OK == fnGetScaleFactorForMonitor(hMonitor, &deviceScaleFactor))
return (static_cast<int>(deviceScaleFactor) + 99) / 100; // increase to first integral multiple of 1
}
}
return 1;
}
std::shared_ptr<Font> Font::Allocate(const FontParameters &fp) {
#if defined(USE_D2D)
if (fp.technology != Technology::Default) {
return std::make_shared<FontDirectWrite>(fp);
}
#endif
return std::make_shared<FontGDI>(fp);
}
// Buffer to hold strings and string position arrays without always allocating on heap.
// May sometimes have string too long to allocate on stack. So use a fixed stack-allocated buffer
// when less than safe size otherwise allocate on heap and free automatically.
template<typename T, int lengthStandard>
class VarBuffer {
T bufferStandard[lengthStandard];
public:
T *buffer;
explicit VarBuffer(size_t length) : buffer(nullptr) {
if (length > lengthStandard) {
buffer = new T[length];
} else {
buffer = bufferStandard;
}
}
// Deleted so VarBuffer objects can not be copied.
VarBuffer(const VarBuffer &) = delete;
VarBuffer(VarBuffer &&) = delete;
VarBuffer &operator=(const VarBuffer &) = delete;
VarBuffer &operator=(VarBuffer &&) = delete;
~VarBuffer() noexcept {
if (buffer != bufferStandard) {
delete []buffer;
buffer = nullptr;
}
}
};
constexpr int stackBufferLength = 400;
class TextWide : public VarBuffer<wchar_t, stackBufferLength> {
public:
int tlen; // Using int instead of size_t as most Win32 APIs take int.
TextWide(std::string_view text, int codePage) :
VarBuffer<wchar_t, stackBufferLength>(text.length()) {
if (codePage == CpUtf8) {
tlen = static_cast<int>(UTF16FromUTF8(text, buffer, text.length()));
} else {
// Support Asian string display in 9x English
tlen = ::MultiByteToWideChar(codePage, 0, text.data(), static_cast<int>(text.length()),
buffer, static_cast<int>(text.length()));
}
}
};
typedef VarBuffer<XYPOSITION, stackBufferLength> TextPositions;
UINT DpiForWindow(WindowID wid) noexcept {
if (fnGetDpiForWindow) {
return fnGetDpiForWindow(HwndFromWindowID(wid));
}
if (fnGetDpiForMonitor) {
HMONITOR hMonitor = ::MonitorFromWindow(HwndFromWindowID(wid), MONITOR_DEFAULTTONEAREST);
UINT dpiX = 0;
UINT dpiY = 0;
if (fnGetDpiForMonitor(hMonitor, 0 /*MDT_EFFECTIVE_DPI*/, &dpiX, &dpiY) == S_OK) {
return dpiY;
}
}
return uSystemDPI;
}
int SystemMetricsForDpi(int nIndex, UINT dpi) noexcept {
if (fnGetSystemMetricsForDpi) {
return fnGetSystemMetricsForDpi(nIndex, dpi);
}
int value = ::GetSystemMetrics(nIndex);
value = (dpi == uSystemDPI) ? value : ::MulDiv(value, dpi, uSystemDPI);
return value;
}
class SurfaceGDI : public Surface {
SurfaceMode mode;
HDC hdc{};
bool hdcOwned=false;
HPEN pen{};
HPEN penOld{};
HBRUSH brush{};
HBRUSH brushOld{};
HFONT fontOld{};
HBITMAP bitmap{};
HBITMAP bitmapOld{};
int logPixelsY = USER_DEFAULT_SCREEN_DPI;
static constexpr int maxWidthMeasure = INT_MAX;
// There appears to be a 16 bit string length limit in GDI on NT.
static constexpr int maxLenText = 65535;
void PenColour(ColourRGBA fore, XYPOSITION widthStroke) noexcept;
void BrushColour(ColourRGBA back) noexcept;
void SetFont(const Font *font_);
void Clear() noexcept;
public:
SurfaceGDI() noexcept;
SurfaceGDI(HDC hdcCompatible, int width, int height, SurfaceMode mode_, int logPixelsY_) noexcept;
// Deleted so SurfaceGDI objects can not be copied.
SurfaceGDI(const SurfaceGDI &) = delete;
SurfaceGDI(SurfaceGDI &&) = delete;
SurfaceGDI &operator=(const SurfaceGDI &) = delete;
SurfaceGDI &operator=(SurfaceGDI &&) = delete;
~SurfaceGDI() noexcept override;
void Init(WindowID wid) override;
void Init(SurfaceID sid, WindowID wid) override;
std::unique_ptr<Surface> AllocatePixMap(int width, int height) override;
void SetMode(SurfaceMode mode_) override;
void Release() noexcept override;
int SupportsFeature(Supports feature) noexcept override;
bool Initialised() override;
int LogPixelsY() override;
int PixelDivisions() override;
int DeviceHeightFont(int points) override;
void LineDraw(Point start, Point end, Stroke stroke) override;
void PolyLine(const Point *pts, size_t npts, Stroke stroke) override;
void Polygon(const Point *pts, size_t npts, FillStroke fillStroke) override;
void RectangleDraw(PRectangle rc, FillStroke fillStroke) override;
void RectangleFrame(PRectangle rc, Stroke stroke) override;
void FillRectangle(PRectangle rc, Fill fill) override;
void FillRectangleAligned(PRectangle rc, Fill fill) override;
void FillRectangle(PRectangle rc, Surface &surfacePattern) override;
void RoundedRectangle(PRectangle rc, FillStroke fillStroke) override;
void AlphaRectangle(PRectangle rc, XYPOSITION cornerSize, FillStroke fillStroke) override;
void GradientRectangle(PRectangle rc, const std::vector<ColourStop> &stops, GradientOptions options) override;
void DrawRGBAImage(PRectangle rc, int width, int height, const unsigned char *pixelsImage) override;
void Ellipse(PRectangle rc, FillStroke fillStroke) override;
void Stadium(PRectangle rc, FillStroke fillStroke, Ends ends) override;
void Copy(PRectangle rc, Point from, Surface &surfaceSource) override;
std::unique_ptr<IScreenLineLayout> Layout(const IScreenLine *screenLine) override;
void DrawTextCommon(PRectangle rc, const Font *font_, XYPOSITION ybase, std::string_view text, UINT fuOptions);
void DrawTextNoClip(PRectangle rc, const Font *font_, XYPOSITION ybase, std::string_view text, ColourRGBA fore, ColourRGBA back) override;
void DrawTextClipped(PRectangle rc, const Font *font_, XYPOSITION ybase, std::string_view text, ColourRGBA fore, ColourRGBA back) override;
void DrawTextTransparent(PRectangle rc, const Font *font_, XYPOSITION ybase, std::string_view text, ColourRGBA fore) override;
void MeasureWidths(const Font *font_, std::string_view text, XYPOSITION *positions) override;
XYPOSITION WidthText(const Font *font_, std::string_view text) override;
void DrawTextCommonUTF8(PRectangle rc, const Font *font_, XYPOSITION ybase, std::string_view text, UINT fuOptions);
void DrawTextNoClipUTF8(PRectangle rc, const Font *font_, XYPOSITION ybase, std::string_view text, ColourRGBA fore, ColourRGBA back) override;
void DrawTextClippedUTF8(PRectangle rc, const Font *font_, XYPOSITION ybase, std::string_view text, ColourRGBA fore, ColourRGBA back) override;
void DrawTextTransparentUTF8(PRectangle rc, const Font *font_, XYPOSITION ybase, std::string_view text, ColourRGBA fore) override;
void MeasureWidthsUTF8(const Font *font_, std::string_view text, XYPOSITION *positions) override;
XYPOSITION WidthTextUTF8(const Font *font_, std::string_view text) override;
XYPOSITION Ascent(const Font *font_) override;
XYPOSITION Descent(const Font *font_) override;
XYPOSITION InternalLeading(const Font *font_) override;
XYPOSITION Height(const Font *font_) override;
XYPOSITION AverageCharWidth(const Font *font_) override;
void SetClip(PRectangle rc) override;
void PopClip() override;
void FlushCachedState() override;
void FlushDrawing() override;
};
SurfaceGDI::SurfaceGDI() noexcept {
}
SurfaceGDI::SurfaceGDI(HDC hdcCompatible, int width, int height, SurfaceMode mode_, int logPixelsY_) noexcept {
hdc = ::CreateCompatibleDC(hdcCompatible);
hdcOwned = true;
bitmap = ::CreateCompatibleBitmap(hdcCompatible, width, height);
bitmapOld = SelectBitmap(hdc, bitmap);
::SetTextAlign(hdc, TA_BASELINE);
mode = mode_;
logPixelsY = logPixelsY_;
}
SurfaceGDI::~SurfaceGDI() noexcept {
Clear();
}
void SurfaceGDI::Clear() noexcept {
if (penOld) {
::SelectObject(hdc, penOld);
::DeleteObject(pen);
penOld = {};
}
pen = {};
if (brushOld) {
::SelectObject(hdc, brushOld);
::DeleteObject(brush);
brushOld = {};
}
brush = {};
if (fontOld) {
// Fonts are not deleted as they are owned by a Font object
::SelectObject(hdc, fontOld);
fontOld = {};
}
if (bitmapOld) {
::SelectObject(hdc, bitmapOld);
::DeleteObject(bitmap);
bitmapOld = {};
}
bitmap = {};
if (hdcOwned) {
::DeleteDC(hdc);
hdc = {};
hdcOwned = false;
}
}
void SurfaceGDI::Release() noexcept {
Clear();
}
int SurfaceGDI::SupportsFeature(Supports feature) noexcept {
for (const Supports f : SupportsGDI) {
if (f == feature)
return 1;
}
return 0;
}
bool SurfaceGDI::Initialised() {
return hdc != 0;
}
void SurfaceGDI::Init(WindowID wid) {
Release();
hdc = ::CreateCompatibleDC({});
hdcOwned = true;
::SetTextAlign(hdc, TA_BASELINE);
logPixelsY = DpiForWindow(wid);
}
void SurfaceGDI::Init(SurfaceID sid, WindowID wid) {
Release();
hdc = static_cast<HDC>(sid);
::SetTextAlign(hdc, TA_BASELINE);
// Windows on screen are scaled but printers are not.
const bool printing = ::GetDeviceCaps(hdc, TECHNOLOGY) != DT_RASDISPLAY;
logPixelsY = printing ? ::GetDeviceCaps(hdc, LOGPIXELSY) : DpiForWindow(wid);
}
std::unique_ptr<Surface> SurfaceGDI::AllocatePixMap(int width, int height) {
return std::make_unique<SurfaceGDI>(hdc, width, height, mode, logPixelsY);
}
void SurfaceGDI::SetMode(SurfaceMode mode_) {
mode = mode_;
}
void SurfaceGDI::PenColour(ColourRGBA fore, XYPOSITION widthStroke) noexcept {
if (pen) {
::SelectObject(hdc, penOld);
::DeleteObject(pen);
pen = {};
penOld = {};
}
const DWORD penWidth = std::lround(widthStroke);
const COLORREF penColour = fore.OpaqueRGB();
if (widthStroke > 1) {
const LOGBRUSH brushParameters{ BS_SOLID, penColour, 0 };
pen = ::ExtCreatePen(PS_GEOMETRIC | PS_ENDCAP_ROUND | PS_JOIN_MITER,
penWidth,
&brushParameters,
0,
nullptr);
} else {
pen = ::CreatePen(PS_INSIDEFRAME, penWidth, penColour);
}
penOld = SelectPen(hdc, pen);
}
void SurfaceGDI::BrushColour(ColourRGBA back) noexcept {
if (brush) {
::SelectObject(hdc, brushOld);
::DeleteObject(brush);
brush = {};
brushOld = {};
}
brush = ::CreateSolidBrush(back.OpaqueRGB());
brushOld = SelectBrush(hdc, brush);
}
void SurfaceGDI::SetFont(const Font *font_) {
const FontGDI *pfm = dynamic_cast<const FontGDI *>(font_);
PLATFORM_ASSERT(pfm);
if (!pfm) {
throw std::runtime_error("SurfaceGDI::SetFont: wrong Font type.");
}
if (fontOld) {
SelectFont(hdc, pfm->hfont);
} else {
fontOld = SelectFont(hdc, pfm->hfont);
}
}
int SurfaceGDI::LogPixelsY() {
return logPixelsY;
}
int SurfaceGDI::PixelDivisions() {
// Win32 uses device pixels.
return 1;
}
int SurfaceGDI::DeviceHeightFont(int points) {
return ::MulDiv(points, LogPixelsY(), 72);
}
void SurfaceGDI::LineDraw(Point start, Point end, Stroke stroke) {
PenColour(stroke.colour, stroke.width);
::MoveToEx(hdc, std::lround(std::floor(start.x)), std::lround(std::floor(start.y)), nullptr);
::LineTo(hdc, std::lround(std::floor(end.x)), std::lround(std::floor(end.y)));
}
void SurfaceGDI::PolyLine(const Point *pts, size_t npts, Stroke stroke) {
PLATFORM_ASSERT(npts > 1);
if (npts <= 1) {
return;
}
PenColour(stroke.colour, stroke.width);
std::vector<POINT> outline;
std::transform(pts, pts + npts, std::back_inserter(outline), POINTFromPoint);
::Polyline(hdc, outline.data(), static_cast<int>(npts));
}
void SurfaceGDI::Polygon(const Point *pts, size_t npts, FillStroke fillStroke) {
PenColour(fillStroke.stroke.colour.WithoutAlpha(), fillStroke.stroke.width);
BrushColour(fillStroke.fill.colour.WithoutAlpha());
std::vector<POINT> outline;
std::transform(pts, pts + npts, std::back_inserter(outline), POINTFromPoint);
::Polygon(hdc, outline.data(), static_cast<int>(npts));
}
void SurfaceGDI::RectangleDraw(PRectangle rc, FillStroke fillStroke) {
RectangleFrame(rc, fillStroke.stroke);
FillRectangle(rc.Inset(fillStroke.stroke.width), fillStroke.fill.colour);
}
void SurfaceGDI::RectangleFrame(PRectangle rc, Stroke stroke) {
BrushColour(stroke.colour);
const RECT rcw = RectFromPRectangle(rc);
::FrameRect(hdc, &rcw, brush);
}
void SurfaceGDI::FillRectangle(PRectangle rc, Fill fill) {
if (fill.colour.IsOpaque()) {
// Using ExtTextOut rather than a FillRect ensures that no dithering occurs.
// There is no need to allocate a brush either.
const RECT rcw = RectFromPRectangle(rc);
::SetBkColor(hdc, fill.colour.OpaqueRGB());
::ExtTextOut(hdc, rcw.left, rcw.top, ETO_OPAQUE, &rcw, TEXT(""), 0, nullptr);
} else {
AlphaRectangle(rc, 0, FillStroke(fill.colour));
}
}
void SurfaceGDI::FillRectangleAligned(PRectangle rc, Fill fill) {
FillRectangle(PixelAlign(rc, 1), fill);
}
void SurfaceGDI::FillRectangle(PRectangle rc, Surface &surfacePattern) {
HBRUSH br;
if (SurfaceGDI *psgdi = dynamic_cast<SurfaceGDI *>(&surfacePattern); psgdi && psgdi->bitmap) {
br = ::CreatePatternBrush(psgdi->bitmap);
} else { // Something is wrong so display in red
br = ::CreateSolidBrush(RGB(0xff, 0, 0));
}
const RECT rcw = RectFromPRectangle(rc);
::FillRect(hdc, &rcw, br);
::DeleteObject(br);
}
void SurfaceGDI::RoundedRectangle(PRectangle rc, FillStroke fillStroke) {
PenColour(fillStroke.stroke.colour, fillStroke.stroke.width);
BrushColour(fillStroke.fill.colour);
const RECT rcw = RectFromPRectangle(rc);
::RoundRect(hdc,
rcw.left + 1, rcw.top,
rcw.right - 1, rcw.bottom,
8, 8);
}
namespace {
constexpr DWORD dwordFromBGRA(byte b, byte g, byte r, byte a) noexcept {
return (a << 24) | (r << 16) | (g << 8) | b;
}
constexpr byte AlphaScaled(unsigned char component, unsigned int alpha) noexcept {
return static_cast<byte>(component * alpha / 255);
}
constexpr DWORD dwordMultiplied(ColourRGBA colour) noexcept {
return dwordFromBGRA(
AlphaScaled(colour.GetBlue(), colour.GetAlpha()),
AlphaScaled(colour.GetGreen(), colour.GetAlpha()),
AlphaScaled(colour.GetRed(), colour.GetAlpha()),
colour.GetAlpha());
}
class DIBSection {
HDC hMemDC {};
HBITMAP hbmMem {};
HBITMAP hbmOld {};
SIZE size {};
DWORD *pixels = nullptr;
public:
DIBSection(HDC hdc, SIZE size_) noexcept;
// Deleted so DIBSection objects can not be copied.
DIBSection(const DIBSection&) = delete;
DIBSection(DIBSection&&) = delete;
DIBSection &operator=(const DIBSection&) = delete;
DIBSection &operator=(DIBSection&&) = delete;
~DIBSection() noexcept;
operator bool() const noexcept {
return hMemDC && hbmMem && pixels;
}
DWORD *Pixels() const noexcept {
return pixels;
}
unsigned char *Bytes() const noexcept {
return reinterpret_cast<unsigned char *>(pixels);
}
HDC DC() const noexcept {
return hMemDC;
}
void SetPixel(LONG x, LONG y, DWORD value) noexcept {
PLATFORM_ASSERT(x >= 0);
PLATFORM_ASSERT(y >= 0);
PLATFORM_ASSERT(x < size.cx);
PLATFORM_ASSERT(y < size.cy);
pixels[y * size.cx + x] = value;
}
void SetSymmetric(LONG x, LONG y, DWORD value) noexcept;
};
DIBSection::DIBSection(HDC hdc, SIZE size_) noexcept {
hMemDC = ::CreateCompatibleDC(hdc);
if (!hMemDC) {
return;
}
size = size_;
// -size.y makes bitmap start from top
const BITMAPINFO bpih = { {sizeof(BITMAPINFOHEADER), size.cx, -size.cy, 1, 32, BI_RGB, 0, 0, 0, 0, 0},
{{0, 0, 0, 0}} };
void *image = nullptr;
hbmMem = CreateDIBSection(hMemDC, &bpih, DIB_RGB_COLORS, &image, {}, 0);
if (!hbmMem || !image) {
return;
}
pixels = static_cast<DWORD *>(image);
hbmOld = SelectBitmap(hMemDC, hbmMem);
}
DIBSection::~DIBSection() noexcept {
if (hbmOld) {
SelectBitmap(hMemDC, hbmOld);
hbmOld = {};
}
if (hbmMem) {
::DeleteObject(hbmMem);
hbmMem = {};
}
if (hMemDC) {
::DeleteDC(hMemDC);
hMemDC = {};
}
}
void DIBSection::SetSymmetric(LONG x, LONG y, DWORD value) noexcept {
// Plot a point symmetrically to all 4 quadrants
const LONG xSymmetric = size.cx - 1 - x;
const LONG ySymmetric = size.cy - 1 - y;
SetPixel(x, y, value);
SetPixel(xSymmetric, y, value);
SetPixel(x, ySymmetric, value);
SetPixel(xSymmetric, ySymmetric, value);
}
ColourRGBA GradientValue(const std::vector<ColourStop> &stops, XYPOSITION proportion) noexcept {
for (size_t stop = 0; stop < stops.size() - 1; stop++) {
// Loop through each pair of stops
const XYPOSITION positionStart = stops[stop].position;
const XYPOSITION positionEnd = stops[stop + 1].position;
if ((proportion >= positionStart) && (proportion <= positionEnd)) {
const XYPOSITION proportionInPair = (proportion - positionStart) /
(positionEnd - positionStart);
return stops[stop].colour.MixedWith(stops[stop + 1].colour, proportionInPair);
}
}
// Loop should always find a value
return ColourRGBA();
}
constexpr SIZE SizeOfRect(RECT rc) noexcept {
return { rc.right - rc.left, rc.bottom - rc.top };
}
constexpr BLENDFUNCTION mergeAlpha = { AC_SRC_OVER, 0, 255, AC_SRC_ALPHA };
}
void SurfaceGDI::AlphaRectangle(PRectangle rc, XYPOSITION cornerSize, FillStroke fillStroke) {
// TODO: Implement strokeWidth
const RECT rcw = RectFromPRectangle(rc);
const SIZE size = SizeOfRect(rcw);
if (size.cx > 0) {
DIBSection section(hdc, size);
if (section) {
// Ensure not distorted too much by corners when small
const LONG corner = std::min(static_cast<LONG>(cornerSize), (std::min(size.cx, size.cy) / 2) - 2);
constexpr DWORD valEmpty = dwordFromBGRA(0,0,0,0);
const DWORD valFill = dwordMultiplied(fillStroke.fill.colour);
const DWORD valOutline = dwordMultiplied(fillStroke.stroke.colour);
// Draw a framed rectangle
for (int y=0; y<size.cy; y++) {
for (int x=0; x<size.cx; x++) {
if ((x==0) || (x==size.cx-1) || (y == 0) || (y == size.cy -1)) {
section.SetPixel(x, y, valOutline);
} else {
section.SetPixel(x, y, valFill);
}
}
}
// Make the corners transparent
for (LONG c=0; c<corner; c++) {
for (LONG x=0; x<c+1; x++) {
section.SetSymmetric(x, c - x, valEmpty);
}
}
// Draw the corner frame pieces
for (LONG x=1; x<corner; x++) {
section.SetSymmetric(x, corner - x, valOutline);
}
AlphaBlend(hdc, rcw.left, rcw.top, size.cx, size.cy, section.DC(), 0, 0, size.cx, size.cy, mergeAlpha);
}
} else {
BrushColour(fillStroke.stroke.colour);
FrameRect(hdc, &rcw, brush);
}
}
void SurfaceGDI::GradientRectangle(PRectangle rc, const std::vector<ColourStop> &stops, GradientOptions options) {
const RECT rcw = RectFromPRectangle(rc);
const SIZE size = SizeOfRect(rcw);
DIBSection section(hdc, size);
if (section) {
if (options == GradientOptions::topToBottom) {
for (LONG y = 0; y < size.cy; y++) {
// Find y/height proportional colour
const XYPOSITION proportion = y / (rc.Height() - 1.0f);
const ColourRGBA mixed = GradientValue(stops, proportion);
const DWORD valFill = dwordMultiplied(mixed);
for (LONG x = 0; x < size.cx; x++) {
section.SetPixel(x, y, valFill);
}
}
} else {
for (LONG x = 0; x < size.cx; x++) {
// Find x/width proportional colour
const XYPOSITION proportion = x / (rc.Width() - 1.0f);
const ColourRGBA mixed = GradientValue(stops, proportion);
const DWORD valFill = dwordMultiplied(mixed);
for (LONG y = 0; y < size.cy; y++) {
section.SetPixel(x, y, valFill);
}
}
}
AlphaBlend(hdc, rcw.left, rcw.top, size.cx, size.cy, section.DC(), 0, 0, size.cx, size.cy, mergeAlpha);
}
}
void SurfaceGDI::DrawRGBAImage(PRectangle rc, int width, int height, const unsigned char *pixelsImage) {
if (rc.Width() > 0) {
if (rc.Width() > width)
rc.left += std::floor((rc.Width() - width) / 2);
rc.right = rc.left + width;
if (rc.Height() > height)
rc.top += std::floor((rc.Height() - height) / 2);
rc.bottom = rc.top + height;
const SIZE size { width, height };
DIBSection section(hdc, size);
if (section) {
RGBAImage::BGRAFromRGBA(section.Bytes(), pixelsImage, static_cast<size_t>(width) * height);
AlphaBlend(hdc, static_cast<int>(rc.left), static_cast<int>(rc.top),
static_cast<int>(rc.Width()), static_cast<int>(rc.Height()), section.DC(),
0, 0, width, height, mergeAlpha);
}
}
}
void SurfaceGDI::Ellipse(PRectangle rc, FillStroke fillStroke) {
PenColour(fillStroke.stroke.colour, fillStroke.stroke.width);
BrushColour(fillStroke.fill.colour);
const RECT rcw = RectFromPRectangle(rc);
::Ellipse(hdc, rcw.left, rcw.top, rcw.right, rcw.bottom);
}
void SurfaceGDI::Stadium(PRectangle rc, FillStroke fillStroke, [[maybe_unused]] Ends ends) {
// TODO: Implement properly - the rectangle is just a placeholder
RectangleDraw(rc, fillStroke);
}
void SurfaceGDI::Copy(PRectangle rc, Point from, Surface &surfaceSource) {
::BitBlt(hdc,
static_cast<int>(rc.left), static_cast<int>(rc.top),
static_cast<int>(rc.Width()), static_cast<int>(rc.Height()),
dynamic_cast<SurfaceGDI &>(surfaceSource).hdc,
static_cast<int>(from.x), static_cast<int>(from.y), SRCCOPY);
}
std::unique_ptr<IScreenLineLayout> SurfaceGDI::Layout(const IScreenLine *) {
return {};
}
typedef VarBuffer<int, stackBufferLength> TextPositionsI;
void SurfaceGDI::DrawTextCommon(PRectangle rc, const Font *font_, XYPOSITION ybase, std::string_view text, UINT fuOptions) {
SetFont(font_);
const RECT rcw = RectFromPRectangle(rc);
const int x = static_cast<int>(rc.left);
const int yBaseInt = static_cast<int>(ybase);
if (mode.codePage == CpUtf8) {
const TextWide tbuf(text, mode.codePage);
::ExtTextOutW(hdc, x, yBaseInt, fuOptions, &rcw, tbuf.buffer, tbuf.tlen, nullptr);
} else {
::ExtTextOutA(hdc, x, yBaseInt, fuOptions, &rcw, text.data(), static_cast<UINT>(text.length()), nullptr);
}
}
void SurfaceGDI::DrawTextNoClip(PRectangle rc, const Font *font_, XYPOSITION ybase, std::string_view text,
ColourRGBA fore, ColourRGBA back) {
::SetTextColor(hdc, fore.OpaqueRGB());
::SetBkColor(hdc, back.OpaqueRGB());
DrawTextCommon(rc, font_, ybase, text, ETO_OPAQUE);
}
void SurfaceGDI::DrawTextClipped(PRectangle rc, const Font *font_, XYPOSITION ybase, std::string_view text,
ColourRGBA fore, ColourRGBA back) {
::SetTextColor(hdc, fore.OpaqueRGB());
::SetBkColor(hdc, back.OpaqueRGB());
DrawTextCommon(rc, font_, ybase, text, ETO_OPAQUE | ETO_CLIPPED);
}
void SurfaceGDI::DrawTextTransparent(PRectangle rc, const Font *font_, XYPOSITION ybase, std::string_view text,
ColourRGBA fore) {
// Avoid drawing spaces in transparent mode
for (const char ch : text) {
if (ch != ' ') {
::SetTextColor(hdc, fore.OpaqueRGB());
::SetBkMode(hdc, TRANSPARENT);
DrawTextCommon(rc, font_, ybase, text, 0);
::SetBkMode(hdc, OPAQUE);
return;
}
}
}
void SurfaceGDI::MeasureWidths(const Font *font_, std::string_view text, XYPOSITION *positions) {
// Zero positions to avoid random behaviour on failure.
std::fill(positions, positions + text.length(), 0.0f);
SetFont(font_);
SIZE sz = { 0,0 };
int fit = 0;
int i = 0;
const int len = static_cast<int>(text.length());
if (mode.codePage == CpUtf8) {
const TextWide tbuf(text, mode.codePage);
TextPositionsI poses(tbuf.tlen);
if (!::GetTextExtentExPointW(hdc, tbuf.buffer, tbuf.tlen, maxWidthMeasure, &fit, poses.buffer, &sz)) {
// Failure
return;
}
// Map the widths given for UTF-16 characters back onto the UTF-8 input string
for (int ui = 0; ui < fit; ui++) {
const unsigned char uch = text[i];
const unsigned int byteCount = UTF8BytesOfLead[uch];
if (byteCount == 4) { // Non-BMP
ui++;
}
for (unsigned int bytePos = 0; (bytePos < byteCount) && (i < len); bytePos++) {
positions[i++] = static_cast<XYPOSITION>(poses.buffer[ui]);
}
}
} else {
TextPositionsI poses(len);
if (!::GetTextExtentExPointA(hdc, text.data(), len, maxWidthMeasure, &fit, poses.buffer, &sz)) {
// Eeek - a NULL DC or other foolishness could cause this.
return;
}
while (i < fit) {
positions[i] = static_cast<XYPOSITION>(poses.buffer[i]);
i++;
}
}
// If any positions not filled in then use the last position for them
const XYPOSITION lastPos = (fit > 0) ? positions[fit - 1] : 0.0f;
std::fill(positions + i, positions + text.length(), lastPos);
}
XYPOSITION SurfaceGDI::WidthText(const Font *font_, std::string_view text) {
SetFont(font_);
SIZE sz = { 0,0 };
if (!(mode.codePage == CpUtf8)) {
::GetTextExtentPoint32A(hdc, text.data(), std::min(static_cast<int>(text.length()), maxLenText), &sz);
} else {
const TextWide tbuf(text, mode.codePage);
::GetTextExtentPoint32W(hdc, tbuf.buffer, tbuf.tlen, &sz);
}
return static_cast<XYPOSITION>(sz.cx);
}
void SurfaceGDI::DrawTextCommonUTF8(PRectangle rc, const Font *font_, XYPOSITION ybase, std::string_view text, UINT fuOptions) {
SetFont(font_);
const RECT rcw = RectFromPRectangle(rc);
const int x = static_cast<int>(rc.left);
const int yBaseInt = static_cast<int>(ybase);
const TextWide tbuf(text, CpUtf8);
::ExtTextOutW(hdc, x, yBaseInt, fuOptions, &rcw, tbuf.buffer, tbuf.tlen, nullptr);
}
void SurfaceGDI::DrawTextNoClipUTF8(PRectangle rc, const Font *font_, XYPOSITION ybase, std::string_view text,
ColourRGBA fore, ColourRGBA back) {
::SetTextColor(hdc, fore.OpaqueRGB());
::SetBkColor(hdc, back.OpaqueRGB());
DrawTextCommonUTF8(rc, font_, ybase, text, ETO_OPAQUE);
}
void SurfaceGDI::DrawTextClippedUTF8(PRectangle rc, const Font *font_, XYPOSITION ybase, std::string_view text,
ColourRGBA fore, ColourRGBA back) {
::SetTextColor(hdc, fore.OpaqueRGB());
::SetBkColor(hdc, back.OpaqueRGB());
DrawTextCommonUTF8(rc, font_, ybase, text, ETO_OPAQUE | ETO_CLIPPED);
}
void SurfaceGDI::DrawTextTransparentUTF8(PRectangle rc, const Font *font_, XYPOSITION ybase, std::string_view text,
ColourRGBA fore) {
// Avoid drawing spaces in transparent mode
for (const char ch : text) {
if (ch != ' ') {
::SetTextColor(hdc, fore.OpaqueRGB());
::SetBkMode(hdc, TRANSPARENT);
DrawTextCommonUTF8(rc, font_, ybase, text, 0);
::SetBkMode(hdc, OPAQUE);
return;
}
}
}
void SurfaceGDI::MeasureWidthsUTF8(const Font *font_, std::string_view text, XYPOSITION *positions) {
// Zero positions to avoid random behaviour on failure.
std::fill(positions, positions + text.length(), 0.0f);
SetFont(font_);
SIZE sz = { 0,0 };
int fit = 0;
int i = 0;
const int len = static_cast<int>(text.length());
const TextWide tbuf(text, CpUtf8);
TextPositionsI poses(tbuf.tlen);
if (!::GetTextExtentExPointW(hdc, tbuf.buffer, tbuf.tlen, maxWidthMeasure, &fit, poses.buffer, &sz)) {
// Failure
return;
}
// Map the widths given for UTF-16 characters back onto the UTF-8 input string
for (int ui = 0; ui < fit; ui++) {
const unsigned char uch = text[i];
const unsigned int byteCount = UTF8BytesOfLead[uch];
if (byteCount == 4) { // Non-BMP
ui++;
}
for (unsigned int bytePos = 0; (bytePos < byteCount) && (i < len); bytePos++) {
positions[i++] = static_cast<XYPOSITION>(poses.buffer[ui]);
}
}
// If any positions not filled in then use the last position for them
const XYPOSITION lastPos = (fit > 0) ? positions[fit - 1] : 0.0f;
std::fill(positions + i, positions + text.length(), lastPos);
}
XYPOSITION SurfaceGDI::WidthTextUTF8(const Font *font_, std::string_view text) {
SetFont(font_);
SIZE sz = { 0,0 };
const TextWide tbuf(text, CpUtf8);
::GetTextExtentPoint32W(hdc, tbuf.buffer, tbuf.tlen, &sz);
return static_cast<XYPOSITION>(sz.cx);
}
XYPOSITION SurfaceGDI::Ascent(const Font *font_) {
SetFont(font_);
TEXTMETRIC tm;
::GetTextMetrics(hdc, &tm);
return static_cast<XYPOSITION>(tm.tmAscent);
}
XYPOSITION SurfaceGDI::Descent(const Font *font_) {
SetFont(font_);
TEXTMETRIC tm;
::GetTextMetrics(hdc, &tm);
return static_cast<XYPOSITION>(tm.tmDescent);
}
XYPOSITION SurfaceGDI::InternalLeading(const Font *font_) {
SetFont(font_);
TEXTMETRIC tm;
::GetTextMetrics(hdc, &tm);
return static_cast<XYPOSITION>(tm.tmInternalLeading);
}
XYPOSITION SurfaceGDI::Height(const Font *font_) {
SetFont(font_);
TEXTMETRIC tm;
::GetTextMetrics(hdc, &tm);
return static_cast<XYPOSITION>(tm.tmHeight);
}
XYPOSITION SurfaceGDI::AverageCharWidth(const Font *font_) {
SetFont(font_);
TEXTMETRIC tm;
::GetTextMetrics(hdc, &tm);
return static_cast<XYPOSITION>(tm.tmAveCharWidth);
}
void SurfaceGDI::SetClip(PRectangle rc) {
::SaveDC(hdc);
::IntersectClipRect(hdc, static_cast<int>(rc.left), static_cast<int>(rc.top),
static_cast<int>(rc.right), static_cast<int>(rc.bottom));
}
void SurfaceGDI::PopClip() {
::RestoreDC(hdc, -1);
}
void SurfaceGDI::FlushCachedState() {
pen = {};
brush = {};
}
void SurfaceGDI::FlushDrawing() {
}
#if defined(USE_D2D)
namespace {
constexpr D2D1_RECT_F RectangleFromPRectangle(PRectangle rc) noexcept {
return {
static_cast<FLOAT>(rc.left),
static_cast<FLOAT>(rc.top),
static_cast<FLOAT>(rc.right),
static_cast<FLOAT>(rc.bottom)
};
}
constexpr D2D1_POINT_2F DPointFromPoint(Point point) noexcept {
return { static_cast<FLOAT>(point.x), static_cast<FLOAT>(point.y) };
}
constexpr Supports SupportsD2D[] = {
Supports::LineDrawsFinal,
Supports::FractionalStrokeWidth,
Supports::TranslucentStroke,
Supports::PixelModification,
Supports::ThreadSafeMeasureWidths,
};
constexpr D2D_COLOR_F ColorFromColourAlpha(ColourRGBA colour) noexcept {
return D2D_COLOR_F{
colour.GetRedComponent(),
colour.GetGreenComponent(),
colour.GetBlueComponent(),
colour.GetAlphaComponent()
};
}
constexpr D2D1_RECT_F RectangleInset(D2D1_RECT_F rect, FLOAT inset) noexcept {
return D2D1_RECT_F{
rect.left + inset,
rect.top + inset,
rect.right - inset,
rect.bottom - inset };
}
}
class BlobInline;
class SurfaceD2D : public Surface, public ISetRenderingParams {
SurfaceMode mode;
ID2D1RenderTarget *pRenderTarget = nullptr;
ID2D1BitmapRenderTarget *pBitmapRenderTarget = nullptr;
bool ownRenderTarget = false;
int clipsActive = 0;
ID2D1SolidColorBrush *pBrush = nullptr;
static constexpr FontQuality invalidFontQuality = FontQuality::QualityMask;
FontQuality fontQuality = invalidFontQuality;
int logPixelsY = USER_DEFAULT_SCREEN_DPI;
int deviceScaleFactor = 1;
std::shared_ptr<RenderingParams> renderingParams;
void Clear() noexcept;
void SetFontQuality(FontQuality extraFontFlag);
HRESULT GetBitmap(ID2D1Bitmap **ppBitmap);
void SetDeviceScaleFactor(const ID2D1RenderTarget *const pRenderTarget) noexcept;
public:
SurfaceD2D() noexcept;
SurfaceD2D(ID2D1RenderTarget *pRenderTargetCompatible, int width, int height, SurfaceMode mode_, int logPixelsY_) noexcept;
// Deleted so SurfaceD2D objects can not be copied.
SurfaceD2D(const SurfaceD2D &) = delete;
SurfaceD2D(SurfaceD2D &&) = delete;
SurfaceD2D &operator=(const SurfaceD2D &) = delete;
SurfaceD2D &operator=(SurfaceD2D &&) = delete;
~SurfaceD2D() noexcept override;
void SetScale(WindowID wid) noexcept;
void Init(WindowID wid) override;
void Init(SurfaceID sid, WindowID wid) override;
std::unique_ptr<Surface> AllocatePixMap(int width, int height) override;
void SetMode(SurfaceMode mode_) override;
void Release() noexcept override;
int SupportsFeature(Supports feature) noexcept override;
bool Initialised() override;
void D2DPenColourAlpha(ColourRGBA fore) noexcept;
int LogPixelsY() override;
int PixelDivisions() override;
int DeviceHeightFont(int points) override;
void LineDraw(Point start, Point end, Stroke stroke) override;
ID2D1PathGeometry *Geometry(const Point *pts, size_t npts, D2D1_FIGURE_BEGIN figureBegin) noexcept;
void PolyLine(const Point *pts, size_t npts, Stroke stroke) override;
void Polygon(const Point *pts, size_t npts, FillStroke fillStroke) override;
void RectangleDraw(PRectangle rc, FillStroke fillStroke) override;
void RectangleFrame(PRectangle rc, Stroke stroke) override;
void FillRectangle(PRectangle rc, Fill fill) override;
void FillRectangleAligned(PRectangle rc, Fill fill) override;
void FillRectangle(PRectangle rc, Surface &surfacePattern) override;
void RoundedRectangle(PRectangle rc, FillStroke fillStroke) override;
void AlphaRectangle(PRectangle rc, XYPOSITION cornerSize, FillStroke fillStroke) override;
void GradientRectangle(PRectangle rc, const std::vector<ColourStop> &stops, GradientOptions options) override;
void DrawRGBAImage(PRectangle rc, int width, int height, const unsigned char *pixelsImage) override;
void Ellipse(PRectangle rc, FillStroke fillStroke) override;
void Stadium(PRectangle rc, FillStroke fillStroke, Ends ends) override;
void Copy(PRectangle rc, Point from, Surface &surfaceSource) override;
std::unique_ptr<IScreenLineLayout> Layout(const IScreenLine *screenLine) override;
void DrawTextCommon(PRectangle rc, const Font *font_, XYPOSITION ybase, std::string_view text, int codePageOverride, UINT fuOptions);
void DrawTextNoClip(PRectangle rc, const Font *font_, XYPOSITION ybase, std::string_view text, ColourRGBA fore, ColourRGBA back) override;
void DrawTextClipped(PRectangle rc, const Font *font_, XYPOSITION ybase, std::string_view text, ColourRGBA fore, ColourRGBA back) override;
void DrawTextTransparent(PRectangle rc, const Font *font_, XYPOSITION ybase, std::string_view text, ColourRGBA fore) override;
void MeasureWidths(const Font *font_, std::string_view text, XYPOSITION *positions) override;
XYPOSITION WidthText(const Font *font_, std::string_view text) override;
void DrawTextNoClipUTF8(PRectangle rc, const Font *font_, XYPOSITION ybase, std::string_view text, ColourRGBA fore, ColourRGBA back) override;
void DrawTextClippedUTF8(PRectangle rc, const Font *font_, XYPOSITION ybase, std::string_view text, ColourRGBA fore, ColourRGBA back) override;
void DrawTextTransparentUTF8(PRectangle rc, const Font *font_, XYPOSITION ybase, std::string_view text, ColourRGBA fore) override;
void MeasureWidthsUTF8(const Font *font_, std::string_view text, XYPOSITION *positions) override;
XYPOSITION WidthTextUTF8(const Font *font_, std::string_view text) override;
XYPOSITION Ascent(const Font *font_) override;
XYPOSITION Descent(const Font *font_) override;
XYPOSITION InternalLeading(const Font *font_) override;
XYPOSITION Height(const Font *font_) override;
XYPOSITION AverageCharWidth(const Font *font_) override;
void SetClip(PRectangle rc) override;
void PopClip() override;
void FlushCachedState() override;
void FlushDrawing() override;
void SetRenderingParams(std::shared_ptr<RenderingParams> renderingParams_) override;
};
SurfaceD2D::SurfaceD2D() noexcept {
}
SurfaceD2D::SurfaceD2D(ID2D1RenderTarget *pRenderTargetCompatible, int width, int height, SurfaceMode mode_, int logPixelsY_) noexcept {
const D2D1_SIZE_F desiredSize = D2D1::SizeF(static_cast<float>(width), static_cast<float>(height));
D2D1_PIXEL_FORMAT desiredFormat;
#ifdef __MINGW32__
desiredFormat.format = DXGI_FORMAT_UNKNOWN;
#else
desiredFormat = pRenderTargetCompatible->GetPixelFormat();
#endif
desiredFormat.alphaMode = D2D1_ALPHA_MODE_IGNORE;
const HRESULT hr = pRenderTargetCompatible->CreateCompatibleRenderTarget(
&desiredSize, nullptr, &desiredFormat, D2D1_COMPATIBLE_RENDER_TARGET_OPTIONS_NONE, &pBitmapRenderTarget);
if (SUCCEEDED(hr)) {
pRenderTarget = pBitmapRenderTarget;
SetDeviceScaleFactor(pRenderTarget);
pRenderTarget->BeginDraw();
ownRenderTarget = true;
}
mode = mode_;
logPixelsY = logPixelsY_;
}
SurfaceD2D::~SurfaceD2D() noexcept {
Clear();
}
void SurfaceD2D::Clear() noexcept {
ReleaseUnknown(pBrush);
if (pRenderTarget) {
while (clipsActive) {
pRenderTarget->PopAxisAlignedClip();
clipsActive--;
}
if (ownRenderTarget) {
pRenderTarget->EndDraw();
ReleaseUnknown(pRenderTarget);
ownRenderTarget = false;
}
pRenderTarget = nullptr;
}
pBitmapRenderTarget = nullptr;
}
void SurfaceD2D::Release() noexcept {
Clear();
}
void SurfaceD2D::SetScale(WindowID wid) noexcept {
fontQuality = invalidFontQuality;
logPixelsY = DpiForWindow(wid);
}
int SurfaceD2D::SupportsFeature(Supports feature) noexcept {
for (const Supports f : SupportsD2D) {
if (f == feature)
return 1;
}
return 0;
}
bool SurfaceD2D::Initialised() {
return pRenderTarget != nullptr;
}
void SurfaceD2D::Init(WindowID wid) {
Release();
SetScale(wid);
}
void SurfaceD2D::Init(SurfaceID sid, WindowID wid) {
Release();
SetScale(wid);
pRenderTarget = static_cast<ID2D1RenderTarget *>(sid);
SetDeviceScaleFactor(pRenderTarget);
}
std::unique_ptr<Surface> SurfaceD2D::AllocatePixMap(int width, int height) {
std::unique_ptr<SurfaceD2D> surf = std::make_unique<SurfaceD2D>(pRenderTarget, width, height, mode, logPixelsY);
surf->SetRenderingParams(renderingParams);
return surf;
}
void SurfaceD2D::SetMode(SurfaceMode mode_) {
mode = mode_;
}
HRESULT SurfaceD2D::GetBitmap(ID2D1Bitmap **ppBitmap) {
PLATFORM_ASSERT(pBitmapRenderTarget);
return pBitmapRenderTarget->GetBitmap(ppBitmap);
}
void SurfaceD2D::D2DPenColourAlpha(ColourRGBA fore) noexcept {
if (pRenderTarget) {
const D2D_COLOR_F col = ColorFromColourAlpha(fore);
if (pBrush) {
pBrush->SetColor(col);
} else {
const HRESULT hr = pRenderTarget->CreateSolidColorBrush(col, &pBrush);
if (!SUCCEEDED(hr)) {
ReleaseUnknown(pBrush);
}
}
}
}
void SurfaceD2D::SetFontQuality(FontQuality extraFontFlag) {
if ((fontQuality != extraFontFlag) && renderingParams) {
fontQuality = extraFontFlag;
const D2D1_TEXT_ANTIALIAS_MODE aaMode = DWriteMapFontQuality(extraFontFlag);
if (aaMode == D2D1_TEXT_ANTIALIAS_MODE_CLEARTYPE && renderingParams->customRenderingParams) {
pRenderTarget->SetTextRenderingParams(renderingParams->customRenderingParams.get());
} else if (renderingParams->defaultRenderingParams) {
pRenderTarget->SetTextRenderingParams(renderingParams->defaultRenderingParams.get());
}
pRenderTarget->SetTextAntialiasMode(aaMode);
}
}
int SurfaceD2D::LogPixelsY() {
return logPixelsY;
}
void SurfaceD2D::SetDeviceScaleFactor(const ID2D1RenderTarget *const pD2D1RenderTarget) noexcept {
FLOAT dpiX = 0.f;
FLOAT dpiY = 0.f;
pD2D1RenderTarget->GetDpi(&dpiX, &dpiY);
deviceScaleFactor = static_cast<int>(dpiX / 96.f);
}
int SurfaceD2D::PixelDivisions() {
return deviceScaleFactor;
}
int SurfaceD2D::DeviceHeightFont(int points) {
return ::MulDiv(points, LogPixelsY(), 72);
}
void SurfaceD2D::LineDraw(Point start, Point end, Stroke stroke) {
D2DPenColourAlpha(stroke.colour);
D2D1_STROKE_STYLE_PROPERTIES strokeProps {};
strokeProps.startCap = D2D1_CAP_STYLE_SQUARE;
strokeProps.endCap = D2D1_CAP_STYLE_SQUARE;
strokeProps.dashCap = D2D1_CAP_STYLE_FLAT;
strokeProps.lineJoin = D2D1_LINE_JOIN_MITER;
strokeProps.miterLimit = 4.0f;
strokeProps.dashStyle = D2D1_DASH_STYLE_SOLID;
strokeProps.dashOffset = 0;
// get the stroke style to apply
ID2D1StrokeStyle *pStrokeStyle = nullptr;
const HRESULT hr = pD2DFactory->CreateStrokeStyle(
strokeProps, nullptr, 0, &pStrokeStyle);
if (SUCCEEDED(hr)) {
pRenderTarget->DrawLine(
DPointFromPoint(start),
DPointFromPoint(end), pBrush, stroke.WidthF(), pStrokeStyle);
}
ReleaseUnknown(pStrokeStyle);
}
ID2D1PathGeometry *SurfaceD2D::Geometry(const Point *pts, size_t npts, D2D1_FIGURE_BEGIN figureBegin) noexcept {
ID2D1PathGeometry *geometry = nullptr;
HRESULT hr = pD2DFactory->CreatePathGeometry(&geometry);
if (SUCCEEDED(hr) && geometry) {
ID2D1GeometrySink *sink = nullptr;
hr = geometry->Open(&sink);
if (SUCCEEDED(hr) && sink) {
sink->BeginFigure(DPointFromPoint(pts[0]), figureBegin);
for (size_t i = 1; i < npts; i++) {
sink->AddLine(DPointFromPoint(pts[i]));
}
sink->EndFigure((figureBegin == D2D1_FIGURE_BEGIN_FILLED) ?
D2D1_FIGURE_END_CLOSED : D2D1_FIGURE_END_OPEN);
sink->Close();
ReleaseUnknown(sink);
}
}
return geometry;
}
void SurfaceD2D::PolyLine(const Point *pts, size_t npts, Stroke stroke) {
PLATFORM_ASSERT(pRenderTarget && (npts > 1));
if (!pRenderTarget || (npts <= 1)) {
return;
}
ID2D1PathGeometry *geometry = Geometry(pts, npts, D2D1_FIGURE_BEGIN_HOLLOW);
PLATFORM_ASSERT(geometry);
if (!geometry) {
return;
}
D2DPenColourAlpha(stroke.colour);
D2D1_STROKE_STYLE_PROPERTIES strokeProps {};
strokeProps.startCap = D2D1_CAP_STYLE_ROUND;
strokeProps.endCap = D2D1_CAP_STYLE_ROUND;
strokeProps.dashCap = D2D1_CAP_STYLE_FLAT;
strokeProps.lineJoin = D2D1_LINE_JOIN_MITER;
strokeProps.miterLimit = 4.0f;
strokeProps.dashStyle = D2D1_DASH_STYLE_SOLID;
strokeProps.dashOffset = 0;
// get the stroke style to apply
ID2D1StrokeStyle *pStrokeStyle = nullptr;
const HRESULT hr = pD2DFactory->CreateStrokeStyle(
strokeProps, nullptr, 0, &pStrokeStyle);
if (SUCCEEDED(hr)) {
pRenderTarget->DrawGeometry(geometry, pBrush, stroke.WidthF(), pStrokeStyle);
}
ReleaseUnknown(pStrokeStyle);
ReleaseUnknown(geometry);
}
void SurfaceD2D::Polygon(const Point *pts, size_t npts, FillStroke fillStroke) {
PLATFORM_ASSERT(pRenderTarget && (npts > 2));
if (pRenderTarget) {
ID2D1PathGeometry *geometry = Geometry(pts, npts, D2D1_FIGURE_BEGIN_FILLED);
PLATFORM_ASSERT(geometry);
if (geometry) {
D2DPenColourAlpha(fillStroke.fill.colour);
pRenderTarget->FillGeometry(geometry, pBrush);
D2DPenColourAlpha(fillStroke.stroke.colour);
pRenderTarget->DrawGeometry(geometry, pBrush, fillStroke.stroke.WidthF());
ReleaseUnknown(geometry);
}
}
}
void SurfaceD2D::RectangleDraw(PRectangle rc, FillStroke fillStroke) {
if (!pRenderTarget)
return;
const D2D1_RECT_F rect = RectangleFromPRectangle(rc);
const D2D1_RECT_F rectFill = RectangleInset(rect, fillStroke.stroke.WidthF());
const float halfStroke = fillStroke.stroke.WidthF() / 2.0f;
const D2D1_RECT_F rectOutline = RectangleInset(rect, halfStroke);
D2DPenColourAlpha(fillStroke.fill.colour);
pRenderTarget->FillRectangle(&rectFill, pBrush);
D2DPenColourAlpha(fillStroke.stroke.colour);
pRenderTarget->DrawRectangle(&rectOutline, pBrush, fillStroke.stroke.WidthF());
}
void SurfaceD2D::RectangleFrame(PRectangle rc, Stroke stroke) {
if (pRenderTarget) {
const XYPOSITION halfStroke = stroke.width / 2.0f;
const D2D1_RECT_F rectangle1 = RectangleFromPRectangle(rc.Inset(halfStroke));
D2DPenColourAlpha(stroke.colour);
pRenderTarget->DrawRectangle(&rectangle1, pBrush, stroke.WidthF());
}
}
void SurfaceD2D::FillRectangle(PRectangle rc, Fill fill) {
if (pRenderTarget) {
D2DPenColourAlpha(fill.colour);
const D2D1_RECT_F rectangle = RectangleFromPRectangle(rc);
pRenderTarget->FillRectangle(&rectangle, pBrush);
}
}
void SurfaceD2D::FillRectangleAligned(PRectangle rc, Fill fill) {
FillRectangle(PixelAlign(rc, PixelDivisions()), fill);
}
void SurfaceD2D::FillRectangle(PRectangle rc, Surface &surfacePattern) {
SurfaceD2D *psurfOther = dynamic_cast<SurfaceD2D *>(&surfacePattern);
PLATFORM_ASSERT(psurfOther);
if (!psurfOther) {
throw std::runtime_error("SurfaceD2D::FillRectangle: wrong Surface type.");
}
ID2D1Bitmap *pBitmap = nullptr;
HRESULT hr = psurfOther->GetBitmap(&pBitmap);
if (SUCCEEDED(hr) && pBitmap) {
ID2D1BitmapBrush *pBitmapBrush = nullptr;
const D2D1_BITMAP_BRUSH_PROPERTIES brushProperties =
D2D1::BitmapBrushProperties(D2D1_EXTEND_MODE_WRAP, D2D1_EXTEND_MODE_WRAP,
D2D1_BITMAP_INTERPOLATION_MODE_NEAREST_NEIGHBOR);
// Create the bitmap brush.
hr = pRenderTarget->CreateBitmapBrush(pBitmap, brushProperties, &pBitmapBrush);
ReleaseUnknown(pBitmap);
if (SUCCEEDED(hr) && pBitmapBrush) {
pRenderTarget->FillRectangle(
RectangleFromPRectangle(rc),
pBitmapBrush);
ReleaseUnknown(pBitmapBrush);
}
}
}
void SurfaceD2D::RoundedRectangle(PRectangle rc, FillStroke fillStroke) {
if (pRenderTarget) {
const FLOAT minDimension = static_cast<FLOAT>(std::min(rc.Width(), rc.Height())) / 2.0f;
const FLOAT radius = std::min(4.0f, minDimension);
if (fillStroke.fill.colour == fillStroke.stroke.colour) {
D2D1_ROUNDED_RECT roundedRectFill = {
RectangleFromPRectangle(rc),
radius, radius };
D2DPenColourAlpha(fillStroke.fill.colour);
pRenderTarget->FillRoundedRectangle(roundedRectFill, pBrush);
} else {
D2D1_ROUNDED_RECT roundedRectFill = {
RectangleFromPRectangle(rc.Inset(1.0)),
radius-1, radius-1 };
D2DPenColourAlpha(fillStroke.fill.colour);
pRenderTarget->FillRoundedRectangle(roundedRectFill, pBrush);
D2D1_ROUNDED_RECT roundedRect = {
RectangleFromPRectangle(rc.Inset(0.5)),
radius, radius };
D2DPenColourAlpha(fillStroke.stroke.colour);
pRenderTarget->DrawRoundedRectangle(roundedRect, pBrush, fillStroke.stroke.WidthF());
}
}
}
void SurfaceD2D::AlphaRectangle(PRectangle rc, XYPOSITION cornerSize, FillStroke fillStroke) {
const D2D1_RECT_F rect = RectangleFromPRectangle(rc);
const D2D1_RECT_F rectFill = RectangleInset(rect, fillStroke.stroke.WidthF());
const float halfStroke = fillStroke.stroke.WidthF() / 2.0f;
const D2D1_RECT_F rectOutline = RectangleInset(rect, halfStroke);
if (pRenderTarget) {
if (cornerSize == 0) {
// When corner size is zero, draw square rectangle to prevent blurry pixels at corners
D2DPenColourAlpha(fillStroke.fill.colour);
pRenderTarget->FillRectangle(rectFill, pBrush);
D2DPenColourAlpha(fillStroke.stroke.colour);
pRenderTarget->DrawRectangle(rectOutline, pBrush, fillStroke.stroke.WidthF());
} else {
const float cornerSizeF = static_cast<float>(cornerSize);
D2D1_ROUNDED_RECT roundedRectFill = {
rectFill, cornerSizeF - 1.0f, cornerSizeF - 1.0f };
D2DPenColourAlpha(fillStroke.fill.colour);
pRenderTarget->FillRoundedRectangle(roundedRectFill, pBrush);
D2D1_ROUNDED_RECT roundedRect = {
rectOutline, cornerSizeF, cornerSizeF};
D2DPenColourAlpha(fillStroke.stroke.colour);
pRenderTarget->DrawRoundedRectangle(roundedRect, pBrush, fillStroke.stroke.WidthF());
}
}
}
void SurfaceD2D::GradientRectangle(PRectangle rc, const std::vector<ColourStop> &stops, GradientOptions options) {
if (pRenderTarget) {
D2D1_LINEAR_GRADIENT_BRUSH_PROPERTIES lgbp {
DPointFromPoint(Point(rc.left, rc.top)), {}
};
switch (options) {
case GradientOptions::leftToRight:
lgbp.endPoint = DPointFromPoint(Point(rc.right, rc.top));
break;
case GradientOptions::topToBottom:
default:
lgbp.endPoint = DPointFromPoint(Point(rc.left, rc.bottom));
break;
}
std::vector<D2D1_GRADIENT_STOP> gradientStops;
for (const ColourStop &stop : stops) {
gradientStops.push_back({ static_cast<FLOAT>(stop.position), ColorFromColourAlpha(stop.colour) });
}
ID2D1GradientStopCollection *pGradientStops = nullptr;
HRESULT hr = pRenderTarget->CreateGradientStopCollection(
gradientStops.data(), static_cast<UINT32>(gradientStops.size()), &pGradientStops);
if (FAILED(hr) || !pGradientStops) {
return;
}
ID2D1LinearGradientBrush *pBrushLinear = nullptr;
hr = pRenderTarget->CreateLinearGradientBrush(
lgbp, pGradientStops, &pBrushLinear);
if (SUCCEEDED(hr) && pBrushLinear) {
const D2D1_RECT_F rectangle = RectangleFromPRectangle(PRectangle(
std::round(rc.left), rc.top, std::round(rc.right), rc.bottom));
pRenderTarget->FillRectangle(&rectangle, pBrushLinear);
ReleaseUnknown(pBrushLinear);
}
ReleaseUnknown(pGradientStops);
}
}
void SurfaceD2D::DrawRGBAImage(PRectangle rc, int width, int height, const unsigned char *pixelsImage) {
if (pRenderTarget) {
if (rc.Width() > width)
rc.left += std::floor((rc.Width() - width) / 2);
rc.right = rc.left + width;
if (rc.Height() > height)
rc.top += std::floor((rc.Height() - height) / 2);
rc.bottom = rc.top + height;
std::vector<unsigned char> image(RGBAImage::bytesPerPixel * height * width);
RGBAImage::BGRAFromRGBA(image.data(), pixelsImage, static_cast<ptrdiff_t>(height) * width);
ID2D1Bitmap *bitmap = nullptr;
const D2D1_SIZE_U size = D2D1::SizeU(width, height);
D2D1_BITMAP_PROPERTIES props = {{DXGI_FORMAT_B8G8R8A8_UNORM,
D2D1_ALPHA_MODE_PREMULTIPLIED}, 72.0, 72.0};
const HRESULT hr = pRenderTarget->CreateBitmap(size, image.data(),
width * 4, &props, &bitmap);
if (SUCCEEDED(hr)) {
const D2D1_RECT_F rcDestination = RectangleFromPRectangle(rc);
pRenderTarget->DrawBitmap(bitmap, rcDestination);
ReleaseUnknown(bitmap);
}
}
}
void SurfaceD2D::Ellipse(PRectangle rc, FillStroke fillStroke) {
if (!pRenderTarget)
return;
const D2D1_POINT_2F centre = DPointFromPoint(rc.Centre());
const FLOAT radiusFill = static_cast<FLOAT>(rc.Width() / 2.0f - fillStroke.stroke.width);
const D2D1_ELLIPSE ellipseFill = { centre, radiusFill, radiusFill };
D2DPenColourAlpha(fillStroke.fill.colour);
pRenderTarget->FillEllipse(ellipseFill, pBrush);
const FLOAT radiusOutline = static_cast<FLOAT>(rc.Width() / 2.0f - fillStroke.stroke.width / 2.0f);
const D2D1_ELLIPSE ellipseOutline = { centre, radiusOutline, radiusOutline };
D2DPenColourAlpha(fillStroke.stroke.colour);
pRenderTarget->DrawEllipse(ellipseOutline, pBrush, fillStroke.stroke.WidthF());
}
void SurfaceD2D::Stadium(PRectangle rc, FillStroke fillStroke, Ends ends) {
if (!pRenderTarget)
return;
if (rc.Width() < rc.Height()) {
// Can't draw nice ends so just draw a rectangle
RectangleDraw(rc, fillStroke);
return;
}
const FLOAT radius = static_cast<FLOAT>(rc.Height() / 2.0);
const FLOAT radiusFill = radius - fillStroke.stroke.WidthF();
const FLOAT halfStroke = fillStroke.stroke.WidthF() / 2.0f;
if (ends == Surface::Ends::semiCircles) {
const D2D1_RECT_F rect = RectangleFromPRectangle(rc);
D2D1_ROUNDED_RECT roundedRectFill = { RectangleInset(rect, fillStroke.stroke.WidthF()),
radiusFill, radiusFill };
D2DPenColourAlpha(fillStroke.fill.colour);
pRenderTarget->FillRoundedRectangle(roundedRectFill, pBrush);
D2D1_ROUNDED_RECT roundedRect = { RectangleInset(rect, halfStroke),
radius, radius };
D2DPenColourAlpha(fillStroke.stroke.colour);
pRenderTarget->DrawRoundedRectangle(roundedRect, pBrush, fillStroke.stroke.WidthF());
} else {
const Ends leftSide = static_cast<Ends>(static_cast<int>(ends) & 0xf);
const Ends rightSide = static_cast<Ends>(static_cast<int>(ends) & 0xf0);
PRectangle rcInner = rc;
rcInner.left += radius;
rcInner.right -= radius;
ID2D1PathGeometry *pathGeometry = nullptr;
const HRESULT hrGeometry = pD2DFactory->CreatePathGeometry(&pathGeometry);
if (FAILED(hrGeometry) || !pathGeometry)
return;
ID2D1GeometrySink *pSink = nullptr;
const HRESULT hrSink = pathGeometry->Open(&pSink);
if (SUCCEEDED(hrSink) && pSink) {
switch (leftSide) {
case Ends::leftFlat:
pSink->BeginFigure(DPointFromPoint(Point(rc.left + halfStroke, rc.top + halfStroke)), D2D1_FIGURE_BEGIN_FILLED);
pSink->AddLine(DPointFromPoint(Point(rc.left + halfStroke, rc.bottom - halfStroke)));
break;
case Ends::leftAngle:
pSink->BeginFigure(DPointFromPoint(Point(rcInner.left + halfStroke, rc.top + halfStroke)), D2D1_FIGURE_BEGIN_FILLED);
pSink->AddLine(DPointFromPoint(Point(rc.left + halfStroke, rc.Centre().y)));
pSink->AddLine(DPointFromPoint(Point(rcInner.left + halfStroke, rc.bottom - halfStroke)));
break;
case Ends::semiCircles:
default: {
pSink->BeginFigure(DPointFromPoint(Point(rcInner.left + halfStroke, rc.top + halfStroke)), D2D1_FIGURE_BEGIN_FILLED);
D2D1_ARC_SEGMENT segment{};
segment.point = DPointFromPoint(Point(rcInner.left + halfStroke, rc.bottom - halfStroke));
segment.size = D2D1::SizeF(radiusFill, radiusFill);
segment.rotationAngle = 0.0f;
segment.sweepDirection = D2D1_SWEEP_DIRECTION_COUNTER_CLOCKWISE;
segment.arcSize = D2D1_ARC_SIZE_SMALL;
pSink->AddArc(segment);
}
break;
}
switch (rightSide) {
case Ends::rightFlat:
pSink->AddLine(DPointFromPoint(Point(rc.right - halfStroke, rc.bottom - halfStroke)));
pSink->AddLine(DPointFromPoint(Point(rc.right - halfStroke, rc.top + halfStroke)));
break;
case Ends::rightAngle:
pSink->AddLine(DPointFromPoint(Point(rcInner.right - halfStroke, rc.bottom - halfStroke)));
pSink->AddLine(DPointFromPoint(Point(rc.right - halfStroke, rc.Centre().y)));
pSink->AddLine(DPointFromPoint(Point(rcInner.right - halfStroke, rc.top + halfStroke)));
break;
case Ends::semiCircles:
default: {
pSink->AddLine(DPointFromPoint(Point(rcInner.right - halfStroke, rc.bottom - halfStroke)));
D2D1_ARC_SEGMENT segment{};
segment.point = DPointFromPoint(Point(rcInner.right - halfStroke, rc.top + halfStroke));
segment.size = D2D1::SizeF(radiusFill, radiusFill);
segment.rotationAngle = 0.0f;
segment.sweepDirection = D2D1_SWEEP_DIRECTION_COUNTER_CLOCKWISE;
segment.arcSize = D2D1_ARC_SIZE_SMALL;
pSink->AddArc(segment);
}
break;
}
pSink->EndFigure(D2D1_FIGURE_END_CLOSED);
pSink->Close();
}
ReleaseUnknown(pSink);
D2DPenColourAlpha(fillStroke.fill.colour);
pRenderTarget->FillGeometry(pathGeometry, pBrush);
D2DPenColourAlpha(fillStroke.stroke.colour);
pRenderTarget->DrawGeometry(pathGeometry, pBrush, fillStroke.stroke.WidthF());
ReleaseUnknown(pathGeometry);
}
}
void SurfaceD2D::Copy(PRectangle rc, Point from, Surface &surfaceSource) {
SurfaceD2D &surfOther = dynamic_cast<SurfaceD2D &>(surfaceSource);
ID2D1Bitmap *pBitmap = nullptr;
const HRESULT hr = surfOther.GetBitmap(&pBitmap);
if (SUCCEEDED(hr) && pBitmap) {
const D2D1_RECT_F rcDestination = RectangleFromPRectangle(rc);
const D2D1_RECT_F rcSource = RectangleFromPRectangle(PRectangle(
from.x, from.y, from.x + rc.Width(), from.y + rc.Height()));
pRenderTarget->DrawBitmap(pBitmap, rcDestination, 1.0f,
D2D1_BITMAP_INTERPOLATION_MODE_NEAREST_NEIGHBOR, rcSource);
ReleaseUnknown(pBitmap);
}
}
class BlobInline : public IDWriteInlineObject {
XYPOSITION width;
// IUnknown
STDMETHODIMP QueryInterface(REFIID riid, PVOID *ppv) override;
STDMETHODIMP_(ULONG)AddRef() override;
STDMETHODIMP_(ULONG)Release() override;
// IDWriteInlineObject
COM_DECLSPEC_NOTHROW STDMETHODIMP Draw(
void *clientDrawingContext,
IDWriteTextRenderer *renderer,
FLOAT originX,
FLOAT originY,
BOOL isSideways,
BOOL isRightToLeft,
IUnknown *clientDrawingEffect
) override;
COM_DECLSPEC_NOTHROW STDMETHODIMP GetMetrics(DWRITE_INLINE_OBJECT_METRICS *metrics) override;
COM_DECLSPEC_NOTHROW STDMETHODIMP GetOverhangMetrics(DWRITE_OVERHANG_METRICS *overhangs) override;
COM_DECLSPEC_NOTHROW STDMETHODIMP GetBreakConditions(
DWRITE_BREAK_CONDITION *breakConditionBefore,
DWRITE_BREAK_CONDITION *breakConditionAfter) override;
public:
BlobInline(XYPOSITION width_=0.0f) noexcept : width(width_) {
}
// Defaulted so BlobInline objects can be copied.
BlobInline(const BlobInline &) = default;
BlobInline(BlobInline &&) = default;
BlobInline &operator=(const BlobInline &) = default;
BlobInline &operator=(BlobInline &&) = default;
virtual ~BlobInline() noexcept = default;
};
/// Implement IUnknown
STDMETHODIMP BlobInline::QueryInterface(REFIID riid, PVOID *ppv) {
if (!ppv)
return E_POINTER;
// Never called so not checked.
*ppv = nullptr;
if (riid == IID_IUnknown)
*ppv = static_cast<IUnknown *>(this);
if (riid == __uuidof(IDWriteInlineObject))
*ppv = static_cast<IDWriteInlineObject *>(this);
if (!*ppv)
return E_NOINTERFACE;
return S_OK;
}
STDMETHODIMP_(ULONG) BlobInline::AddRef() {
// Lifetime tied to Platform methods so ignore any reference operations.
return 1;
}
STDMETHODIMP_(ULONG) BlobInline::Release() {
// Lifetime tied to Platform methods so ignore any reference operations.
return 1;
}
/// Implement IDWriteInlineObject
COM_DECLSPEC_NOTHROW HRESULT STDMETHODCALLTYPE BlobInline::Draw(
void*,
IDWriteTextRenderer*,
FLOAT,
FLOAT,
BOOL,
BOOL,
IUnknown*) {
// Since not performing drawing, not necessary to implement
// Could be implemented by calling back into platform-independent code.
// This would allow more of the drawing to be mediated through DirectWrite.
return S_OK;
}
COM_DECLSPEC_NOTHROW HRESULT STDMETHODCALLTYPE BlobInline::GetMetrics(
DWRITE_INLINE_OBJECT_METRICS *metrics
) {
if (!metrics)
return E_POINTER;
metrics->width = static_cast<FLOAT>(width);
metrics->height = 2;
metrics->baseline = 1;
metrics->supportsSideways = FALSE;
return S_OK;
}
COM_DECLSPEC_NOTHROW HRESULT STDMETHODCALLTYPE BlobInline::GetOverhangMetrics(
DWRITE_OVERHANG_METRICS *overhangs
) {
if (!overhangs)
return E_POINTER;
overhangs->left = 0;
overhangs->top = 0;
overhangs->right = 0;
overhangs->bottom = 0;
return S_OK;
}
COM_DECLSPEC_NOTHROW HRESULT STDMETHODCALLTYPE BlobInline::GetBreakConditions(
DWRITE_BREAK_CONDITION *breakConditionBefore,
DWRITE_BREAK_CONDITION *breakConditionAfter
) {
if (!breakConditionBefore || !breakConditionAfter)
return E_POINTER;
// Since not performing 2D layout, not necessary to implement
*breakConditionBefore = DWRITE_BREAK_CONDITION_NEUTRAL;
*breakConditionAfter = DWRITE_BREAK_CONDITION_NEUTRAL;
return S_OK;
}
class ScreenLineLayout : public IScreenLineLayout {
IDWriteTextLayout *textLayout = nullptr;
std::string text;
std::wstring buffer;
std::vector<BlobInline> blobs;
static void FillTextLayoutFormats(const IScreenLine *screenLine, IDWriteTextLayout *textLayout, std::vector<BlobInline> &blobs);
static std::wstring ReplaceRepresentation(std::string_view text);
static size_t GetPositionInLayout(std::string_view text, size_t position);
public:
ScreenLineLayout(const IScreenLine *screenLine);
// Deleted so ScreenLineLayout objects can not be copied
ScreenLineLayout(const ScreenLineLayout &) = delete;
ScreenLineLayout(ScreenLineLayout &&) = delete;
ScreenLineLayout &operator=(const ScreenLineLayout &) = delete;
ScreenLineLayout &operator=(ScreenLineLayout &&) = delete;
~ScreenLineLayout() noexcept override;
size_t PositionFromX(XYPOSITION xDistance, bool charPosition) override;
XYPOSITION XFromPosition(size_t caretPosition) override;
std::vector<Interval> FindRangeIntervals(size_t start, size_t end) override;
};
// Each char can have its own style, so we fill the textLayout with the textFormat of each char
void ScreenLineLayout::FillTextLayoutFormats(const IScreenLine *screenLine, IDWriteTextLayout *textLayout, std::vector<BlobInline> &blobs) {
// Reserve enough entries up front so they are not moved and the pointers handed
// to textLayout remain valid.
const ptrdiff_t numRepresentations = screenLine->RepresentationCount();
std::string_view text = screenLine->Text();
const ptrdiff_t numTabs = std::count(std::begin(text), std::end(text), '\t');
blobs.reserve(numRepresentations + numTabs);
UINT32 layoutPosition = 0;
for (size_t bytePosition = 0; bytePosition < screenLine->Length();) {
const unsigned char uch = screenLine->Text()[bytePosition];
const unsigned int byteCount = UTF8BytesOfLead[uch];
const UINT32 codeUnits = UTF16LengthFromUTF8ByteCount(byteCount);
const DWRITE_TEXT_RANGE textRange = { layoutPosition, codeUnits };
XYPOSITION representationWidth = screenLine->RepresentationWidth(bytePosition);
if ((representationWidth == 0.0f) && (screenLine->Text()[bytePosition] == '\t')) {
D2D1_POINT_2F realPt {};
DWRITE_HIT_TEST_METRICS realCaretMetrics {};
textLayout->HitTestTextPosition(
layoutPosition,
false, // trailing if false, else leading edge
&realPt.x,
&realPt.y,
&realCaretMetrics
);
const XYPOSITION nextTab = screenLine->TabPositionAfter(realPt.x);
representationWidth = nextTab - realPt.x;
}
if (representationWidth > 0.0f) {
blobs.push_back(BlobInline(representationWidth));
textLayout->SetInlineObject(&blobs.back(), textRange);
};
const FontDirectWrite *pfm =
dynamic_cast<const FontDirectWrite *>(screenLine->FontOfPosition(bytePosition));
if (!pfm) {
throw std::runtime_error("FillTextLayoutFormats: wrong Font type.");
}
const unsigned int fontFamilyNameSize = pfm->pTextFormat->GetFontFamilyNameLength();
std::wstring fontFamilyName(fontFamilyNameSize, 0);
const HRESULT hrFamily = pfm->pTextFormat->GetFontFamilyName(fontFamilyName.data(), fontFamilyNameSize + 1);
if (SUCCEEDED(hrFamily)) {
textLayout->SetFontFamilyName(fontFamilyName.c_str(), textRange);
}
textLayout->SetFontSize(pfm->pTextFormat->GetFontSize(), textRange);
textLayout->SetFontWeight(pfm->pTextFormat->GetFontWeight(), textRange);
textLayout->SetFontStyle(pfm->pTextFormat->GetFontStyle(), textRange);
const unsigned int localeNameSize = pfm->pTextFormat->GetLocaleNameLength();
std::wstring localeName(localeNameSize, 0);
const HRESULT hrLocale = pfm->pTextFormat->GetLocaleName(localeName.data(), localeNameSize + 1);
if (SUCCEEDED(hrLocale)) {
textLayout->SetLocaleName(localeName.c_str(), textRange);
}
textLayout->SetFontStretch(pfm->pTextFormat->GetFontStretch(), textRange);
IDWriteFontCollection *fontCollection = nullptr;
if (SUCCEEDED(pfm->pTextFormat->GetFontCollection(&fontCollection))) {
textLayout->SetFontCollection(fontCollection, textRange);
}
bytePosition += byteCount;
layoutPosition += codeUnits;
}
}
/* Convert to a wide character string and replace tabs with X to stop DirectWrite tab expansion */
std::wstring ScreenLineLayout::ReplaceRepresentation(std::string_view text) {
const TextWide wideText(text, CpUtf8);
std::wstring ws(wideText.buffer, wideText.tlen);
std::replace(ws.begin(), ws.end(), L'\t', L'X');
return ws;
}
// Finds the position in the wide character version of the text.
size_t ScreenLineLayout::GetPositionInLayout(std::string_view text, size_t position) {
const std::string_view textUptoPosition = text.substr(0, position);
return UTF16Length(textUptoPosition);
}
ScreenLineLayout::ScreenLineLayout(const IScreenLine *screenLine) {
// If the text is empty, then no need to go through this function
if (!screenLine || !screenLine->Length())
return;
text = screenLine->Text();
// Get textFormat
const FontDirectWrite *pfm = FontDirectWrite::Cast(screenLine->FontOfPosition(0));
if (!pfm->pTextFormat) {
return;
}
// Convert the string to wstring and replace the original control characters with their representative chars.
buffer = ReplaceRepresentation(screenLine->Text());
// Create a text layout
const HRESULT hrCreate = pIDWriteFactory->CreateTextLayout(
buffer.c_str(),
static_cast<UINT32>(buffer.length()),
pfm->pTextFormat,
static_cast<FLOAT>(screenLine->Width()),
static_cast<FLOAT>(screenLine->Height()),
&textLayout);
if (!SUCCEEDED(hrCreate)) {
return;
}
// Fill the textLayout chars with their own formats
FillTextLayoutFormats(screenLine, textLayout, blobs);
}
ScreenLineLayout::~ScreenLineLayout() noexcept {
ReleaseUnknown(textLayout);
}
// Get the position from the provided x
size_t ScreenLineLayout::PositionFromX(XYPOSITION xDistance, bool charPosition) {
if (!textLayout) {
return 0;
}
// Returns the text position corresponding to the mouse x,y.
// If hitting the trailing side of a cluster, return the
// leading edge of the following text position.
BOOL isTrailingHit = FALSE;
BOOL isInside = FALSE;
DWRITE_HIT_TEST_METRICS caretMetrics {};
textLayout->HitTestPoint(
static_cast<FLOAT>(xDistance),
0.0f,
&isTrailingHit,
&isInside,
&caretMetrics
);
DWRITE_HIT_TEST_METRICS hitTestMetrics {};
if (isTrailingHit) {
FLOAT caretX = 0.0f;
FLOAT caretY = 0.0f;
// Uses hit-testing to align the current caret position to a whole cluster,
// rather than residing in the middle of a base character + diacritic,
// surrogate pair, or character + UVS.
// Align the caret to the nearest whole cluster.
textLayout->HitTestTextPosition(
caretMetrics.textPosition,
false,
&caretX,
&caretY,
&hitTestMetrics
);
}
size_t pos;
if (charPosition) {
pos = isTrailingHit ? hitTestMetrics.textPosition : caretMetrics.textPosition;
} else {
pos = isTrailingHit ? static_cast<size_t>(hitTestMetrics.textPosition) + hitTestMetrics.length : caretMetrics.textPosition;
}
// Get the character position in original string
return UTF8PositionFromUTF16Position(text, pos);
}
// Finds the point of the caret position
XYPOSITION ScreenLineLayout::XFromPosition(size_t caretPosition) {
if (!textLayout) {
return 0.0;
}
// Convert byte positions to wchar_t positions
const size_t position = GetPositionInLayout(text, caretPosition);
// Translate text character offset to point x,y.
DWRITE_HIT_TEST_METRICS caretMetrics {};
D2D1_POINT_2F pt {};
textLayout->HitTestTextPosition(
static_cast<UINT32>(position),
false, // trailing if false, else leading edge
&pt.x,
&pt.y,
&caretMetrics
);
return pt.x;
}
// Find the selection range rectangles
std::vector<Interval> ScreenLineLayout::FindRangeIntervals(size_t start, size_t end) {
std::vector<Interval> ret;
if (!textLayout || (start == end)) {
return ret;
}
// Convert byte positions to wchar_t positions
const size_t startPos = GetPositionInLayout(text, start);
const size_t endPos = GetPositionInLayout(text, end);
// Find selection range length
const size_t rangeLength = (endPos > startPos) ? (endPos - startPos) : (startPos - endPos);
// Determine actual number of hit-test ranges
UINT32 actualHitTestCount = 0;
// First try with 2 elements and if more needed, allocate.
std::vector<DWRITE_HIT_TEST_METRICS> hitTestMetrics(2);
textLayout->HitTestTextRange(
static_cast<UINT32>(startPos),
static_cast<UINT32>(rangeLength),
0, // x
0, // y
hitTestMetrics.data(),
static_cast<UINT32>(hitTestMetrics.size()),
&actualHitTestCount
);
if (actualHitTestCount == 0) {
return ret;
}
if (hitTestMetrics.size() < actualHitTestCount) {
// Allocate enough room to return all hit-test metrics.
hitTestMetrics.resize(actualHitTestCount);
textLayout->HitTestTextRange(
static_cast<UINT32>(startPos),
static_cast<UINT32>(rangeLength),
0, // x
0, // y
hitTestMetrics.data(),
static_cast<UINT32>(hitTestMetrics.size()),
&actualHitTestCount
);
}
// Get the selection ranges behind the text.
for (size_t i = 0; i < actualHitTestCount; ++i) {
// Store selection rectangle
const DWRITE_HIT_TEST_METRICS &htm = hitTestMetrics[i];
const Interval selectionInterval { htm.left, htm.left + htm.width };
ret.push_back(selectionInterval);
}
return ret;
}
std::unique_ptr<IScreenLineLayout> SurfaceD2D::Layout(const IScreenLine *screenLine) {
return std::make_unique<ScreenLineLayout>(screenLine);
}
void SurfaceD2D::DrawTextCommon(PRectangle rc, const Font *font_, XYPOSITION ybase, std::string_view text, int codePageOverride, UINT fuOptions) {
const FontDirectWrite *pfm = FontDirectWrite::Cast(font_);
if (pfm->pTextFormat && pRenderTarget && pBrush) {
// Use Unicode calls
const int codePageDraw = codePageOverride ? codePageOverride : pfm->CodePageText(mode.codePage);
const TextWide tbuf(text, codePageDraw);
SetFontQuality(pfm->extraFontFlag);
if (fuOptions & ETO_CLIPPED) {
const D2D1_RECT_F rcClip = RectangleFromPRectangle(rc);
pRenderTarget->PushAxisAlignedClip(rcClip, D2D1_ANTIALIAS_MODE_ALIASED);
}
// Explicitly creating a text layout appears a little faster
IDWriteTextLayout *pTextLayout = nullptr;
const HRESULT hr = pIDWriteFactory->CreateTextLayout(
tbuf.buffer,
tbuf.tlen,
pfm->pTextFormat,
static_cast<FLOAT>(rc.Width()),
static_cast<FLOAT>(rc.Height()),
&pTextLayout);
if (SUCCEEDED(hr)) {
const D2D1_POINT_2F origin = DPointFromPoint(Point(rc.left, ybase - pfm->yAscent));
pRenderTarget->DrawTextLayout(origin, pTextLayout, pBrush, d2dDrawTextOptions);
ReleaseUnknown(pTextLayout);
}
if (fuOptions & ETO_CLIPPED) {
pRenderTarget->PopAxisAlignedClip();
}
}
}
void SurfaceD2D::DrawTextNoClip(PRectangle rc, const Font *font_, XYPOSITION ybase, std::string_view text,
ColourRGBA fore, ColourRGBA back) {
if (pRenderTarget) {
FillRectangleAligned(rc, back);
D2DPenColourAlpha(fore);
DrawTextCommon(rc, font_, ybase, text, 0, ETO_OPAQUE);
}
}
void SurfaceD2D::DrawTextClipped(PRectangle rc, const Font *font_, XYPOSITION ybase, std::string_view text,
ColourRGBA fore, ColourRGBA back) {
if (pRenderTarget) {
FillRectangleAligned(rc, back);
D2DPenColourAlpha(fore);
DrawTextCommon(rc, font_, ybase, text, 0, ETO_OPAQUE | ETO_CLIPPED);
}
}
void SurfaceD2D::DrawTextTransparent(PRectangle rc, const Font *font_, XYPOSITION ybase, std::string_view text,
ColourRGBA fore) {
// Avoid drawing spaces in transparent mode
for (const char ch : text) {
if (ch != ' ') {
if (pRenderTarget) {
D2DPenColourAlpha(fore);
DrawTextCommon(rc, font_, ybase, text, 0, 0);
}
return;
}
}
}
namespace {
HRESULT MeasurePositions(TextPositions &poses, const TextWide &tbuf, IDWriteTextFormat *pTextFormat) {
if (!pTextFormat) {
// Unexpected failure like no access to DirectWrite so give up.
return E_FAIL;
}
// Initialize poses for safety.
std::fill(poses.buffer, poses.buffer + tbuf.tlen, 0.0f);
// Create a layout
IDWriteTextLayout *pTextLayout = nullptr;
const HRESULT hrCreate = pIDWriteFactory->CreateTextLayout(tbuf.buffer, tbuf.tlen, pTextFormat, 10000.0, 1000.0, &pTextLayout);
if (!SUCCEEDED(hrCreate)) {
return hrCreate;
}
if (!pTextLayout) {
return E_FAIL;
}
VarBuffer<DWRITE_CLUSTER_METRICS, stackBufferLength> cm(tbuf.tlen);
UINT32 count = 0;
const HRESULT hrGetCluster = pTextLayout->GetClusterMetrics(cm.buffer, tbuf.tlen, &count);
ReleaseUnknown(pTextLayout);
if (!SUCCEEDED(hrGetCluster)) {
return hrGetCluster;
}
const DWRITE_CLUSTER_METRICS * const clusterMetrics = cm.buffer;
// A cluster may be more than one WCHAR, such as for "ffi" which is a ligature in the Candara font
XYPOSITION position = 0.0;
int ti=0;
for (unsigned int ci=0; ci<count; ci++) {
for (unsigned int inCluster=0; inCluster<clusterMetrics[ci].length; inCluster++) {
poses.buffer[ti++] = position + clusterMetrics[ci].width * (inCluster + 1) / clusterMetrics[ci].length;
}
position += clusterMetrics[ci].width;
}
PLATFORM_ASSERT(ti == tbuf.tlen);
return S_OK;
}
}
void SurfaceD2D::MeasureWidths(const Font *font_, std::string_view text, XYPOSITION *positions) {
const FontDirectWrite *pfm = FontDirectWrite::Cast(font_);
const int codePageText = pfm->CodePageText(mode.codePage);
const TextWide tbuf(text, codePageText);
TextPositions poses(tbuf.tlen);
if (FAILED(MeasurePositions(poses, tbuf, pfm->pTextFormat))) {
return;
}
if (codePageText == CpUtf8) {
// Map the widths given for UTF-16 characters back onto the UTF-8 input string
size_t i = 0;
for (int ui = 0; ui < tbuf.tlen; ui++) {
const unsigned char uch = text[i];
const unsigned int byteCount = UTF8BytesOfLead[uch];
if (byteCount == 4) { // Non-BMP
ui++;
}
for (unsigned int bytePos=0; (bytePos<byteCount) && (i<text.length()) && (ui<tbuf.tlen); bytePos++) {
positions[i++] = poses.buffer[ui];
}
}
const XYPOSITION lastPos = (i > 0) ? positions[i - 1] : 0.0;
while (i<text.length()) {
positions[i++] = lastPos;
}
} else if (!IsDBCSCodePage(codePageText)) {
// One char per position
PLATFORM_ASSERT(text.length() == static_cast<size_t>(tbuf.tlen));
for (int kk=0; kk<tbuf.tlen; kk++) {
positions[kk] = poses.buffer[kk];
}
} else {
// May be one or two bytes per position
int ui = 0;
for (size_t i=0; i<text.length() && ui<tbuf.tlen;) {
positions[i] = poses.buffer[ui];
if (DBCSIsLeadByte(codePageText, text[i])) {
positions[i+1] = poses.buffer[ui];
i += 2;
} else {
i++;
}
ui++;
}
}
}
XYPOSITION SurfaceD2D::WidthText(const Font *font_, std::string_view text) {
FLOAT width = 1.0;
const FontDirectWrite *pfm = FontDirectWrite::Cast(font_);
if (pfm->pTextFormat) {
const TextWide tbuf(text, pfm->CodePageText(mode.codePage));
// Create a layout
IDWriteTextLayout *pTextLayout = nullptr;
const HRESULT hr = pIDWriteFactory->CreateTextLayout(tbuf.buffer, tbuf.tlen, pfm->pTextFormat, 1000.0, 1000.0, &pTextLayout);
if (SUCCEEDED(hr) && pTextLayout) {
DWRITE_TEXT_METRICS textMetrics;
if (SUCCEEDED(pTextLayout->GetMetrics(&textMetrics)))
width = textMetrics.widthIncludingTrailingWhitespace;
ReleaseUnknown(pTextLayout);
}
}
return width;
}
void SurfaceD2D::DrawTextNoClipUTF8(PRectangle rc, const Font *font_, XYPOSITION ybase, std::string_view text,
ColourRGBA fore, ColourRGBA back) {
if (pRenderTarget) {
FillRectangleAligned(rc, back);
D2DPenColourAlpha(fore);
DrawTextCommon(rc, font_, ybase, text, CpUtf8, ETO_OPAQUE);
}
}
void SurfaceD2D::DrawTextClippedUTF8(PRectangle rc, const Font *font_, XYPOSITION ybase, std::string_view text,
ColourRGBA fore, ColourRGBA back) {
if (pRenderTarget) {
FillRectangleAligned(rc, back);
D2DPenColourAlpha(fore);
DrawTextCommon(rc, font_, ybase, text, CpUtf8, ETO_OPAQUE | ETO_CLIPPED);
}
}
void SurfaceD2D::DrawTextTransparentUTF8(PRectangle rc, const Font *font_, XYPOSITION ybase, std::string_view text,
ColourRGBA fore) {
// Avoid drawing spaces in transparent mode
for (const char ch : text) {
if (ch != ' ') {
if (pRenderTarget) {
D2DPenColourAlpha(fore);
DrawTextCommon(rc, font_, ybase, text, CpUtf8, 0);
}
return;
}
}
}
void SurfaceD2D::MeasureWidthsUTF8(const Font *font_, std::string_view text, XYPOSITION *positions) {
const FontDirectWrite *pfm = FontDirectWrite::Cast(font_);
const TextWide tbuf(text, CpUtf8);
TextPositions poses(tbuf.tlen);
if (FAILED(MeasurePositions(poses, tbuf, pfm->pTextFormat))) {
return;
}
// Map the widths given for UTF-16 characters back onto the UTF-8 input string
size_t i = 0;
for (int ui = 0; ui < tbuf.tlen; ui++) {
const unsigned char uch = text[i];
const unsigned int byteCount = UTF8BytesOfLead[uch];
if (byteCount == 4) { // Non-BMP
ui++;
PLATFORM_ASSERT(ui < tbuf.tlen);
}
for (unsigned int bytePos=0; (bytePos<byteCount) && (i<text.length()) && (ui < tbuf.tlen); bytePos++) {
positions[i++] = poses.buffer[ui];
}
}
const XYPOSITION lastPos = (i > 0) ? positions[i - 1] : 0.0;
while (i < text.length()) {
positions[i++] = lastPos;
}
}
XYPOSITION SurfaceD2D::WidthTextUTF8(const Font * font_, std::string_view text) {
FLOAT width = 1.0;
const FontDirectWrite *pfm = FontDirectWrite::Cast(font_);
if (pfm->pTextFormat) {
const TextWide tbuf(text, CpUtf8);
// Create a layout
IDWriteTextLayout *pTextLayout = nullptr;
const HRESULT hr = pIDWriteFactory->CreateTextLayout(tbuf.buffer, tbuf.tlen, pfm->pTextFormat, 1000.0, 1000.0, &pTextLayout);
if (SUCCEEDED(hr)) {
DWRITE_TEXT_METRICS textMetrics;
if (SUCCEEDED(pTextLayout->GetMetrics(&textMetrics)))
width = textMetrics.widthIncludingTrailingWhitespace;
ReleaseUnknown(pTextLayout);
}
}
return width;
}
XYPOSITION SurfaceD2D::Ascent(const Font *font_) {
const FontDirectWrite *pfm = FontDirectWrite::Cast(font_);
return std::ceil(pfm->yAscent);
}
XYPOSITION SurfaceD2D::Descent(const Font *font_) {
const FontDirectWrite *pfm = FontDirectWrite::Cast(font_);
return std::ceil(pfm->yDescent);
}
XYPOSITION SurfaceD2D::InternalLeading(const Font *font_) {
const FontDirectWrite *pfm = FontDirectWrite::Cast(font_);
return std::floor(pfm->yInternalLeading);
}
XYPOSITION SurfaceD2D::Height(const Font *font_) {
const FontDirectWrite *pfm = FontDirectWrite::Cast(font_);
return std::ceil(pfm->yAscent) + std::ceil(pfm->yDescent);
}
XYPOSITION SurfaceD2D::AverageCharWidth(const Font *font_) {
FLOAT width = 1.0;
const FontDirectWrite *pfm = FontDirectWrite::Cast(font_);
if (pfm->pTextFormat) {
// Create a layout
IDWriteTextLayout *pTextLayout = nullptr;
static constexpr WCHAR wszAllAlpha[] = L"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
const size_t lenAllAlpha = wcslen(wszAllAlpha);
const HRESULT hr = pIDWriteFactory->CreateTextLayout(wszAllAlpha, static_cast<UINT32>(lenAllAlpha),
pfm->pTextFormat, 1000.0, 1000.0, &pTextLayout);
if (SUCCEEDED(hr) && pTextLayout) {
DWRITE_TEXT_METRICS textMetrics;
if (SUCCEEDED(pTextLayout->GetMetrics(&textMetrics)))
width = textMetrics.width / lenAllAlpha;
ReleaseUnknown(pTextLayout);
}
}
return width;
}
void SurfaceD2D::SetClip(PRectangle rc) {
if (pRenderTarget) {
const D2D1_RECT_F rcClip = RectangleFromPRectangle(rc);
pRenderTarget->PushAxisAlignedClip(rcClip, D2D1_ANTIALIAS_MODE_ALIASED);
clipsActive++;
}
}
void SurfaceD2D::PopClip() {
if (pRenderTarget) {
PLATFORM_ASSERT(clipsActive > 0);
pRenderTarget->PopAxisAlignedClip();
clipsActive--;
}
}
void SurfaceD2D::FlushCachedState() {
}
void SurfaceD2D::FlushDrawing() {
if (pRenderTarget) {
pRenderTarget->Flush();
}
}
void SurfaceD2D::SetRenderingParams(std::shared_ptr<RenderingParams> renderingParams_) {
renderingParams = renderingParams_;
}
#endif
std::unique_ptr<Surface> Surface::Allocate(Technology technology) {
#if defined(USE_D2D)
if (technology == Technology::Default)
return std::make_unique<SurfaceGDI>();
else
return std::make_unique<SurfaceD2D>();
#else
return std::make_unique<SurfaceGDI>();
#endif
}
Window::~Window() noexcept {
}
void Window::Destroy() noexcept {
if (wid)
::DestroyWindow(HwndFromWindowID(wid));
wid = nullptr;
}
PRectangle Window::GetPosition() const {
RECT rc;
::GetWindowRect(HwndFromWindowID(wid), &rc);
return PRectangle::FromInts(rc.left, rc.top, rc.right, rc.bottom);
}
void Window::SetPosition(PRectangle rc) {
::SetWindowPos(HwndFromWindowID(wid),
0, static_cast<int>(rc.left), static_cast<int>(rc.top),
static_cast<int>(rc.Width()), static_cast<int>(rc.Height()), SWP_NOZORDER | SWP_NOACTIVATE);
}
namespace {
RECT RectFromMonitor(HMONITOR hMonitor) noexcept {
MONITORINFO mi = {};
mi.cbSize = sizeof(mi);
if (GetMonitorInfo(hMonitor, &mi)) {
return mi.rcWork;
}
RECT rc = {0, 0, 0, 0};
if (::SystemParametersInfoA(SPI_GETWORKAREA, 0, &rc, 0) == 0) {
rc.left = 0;
rc.top = 0;
rc.right = 0;
rc.bottom = 0;
}
return rc;
}
}
void Window::SetPositionRelative(PRectangle rc, const Window *relativeTo) {
const DWORD style = GetWindowStyle(HwndFromWindowID(wid));
if (style & WS_POPUP) {
POINT ptOther = {0, 0};
::ClientToScreen(HwndFromWindow(*relativeTo), &ptOther);
rc.Move(static_cast<XYPOSITION>(ptOther.x), static_cast<XYPOSITION>(ptOther.y));
const RECT rcMonitor = RectFromPRectangle(rc);
HMONITOR hMonitor = MonitorFromRect(&rcMonitor, MONITOR_DEFAULTTONEAREST);
// If hMonitor is NULL, that's just the main screen anyways.
const RECT rcWork = RectFromMonitor(hMonitor);
if (rcWork.left < rcWork.right) {
// Now clamp our desired rectangle to fit inside the work area
// This way, the menu will fit wholly on one screen. An improvement even
// if you don't have a second monitor on the left... Menu's appears half on
// one screen and half on the other are just U.G.L.Y.!
if (rc.right > rcWork.right)
rc.Move(rcWork.right - rc.right, 0);
if (rc.bottom > rcWork.bottom)
rc.Move(0, rcWork.bottom - rc.bottom);
if (rc.left < rcWork.left)
rc.Move(rcWork.left - rc.left, 0);
if (rc.top < rcWork.top)
rc.Move(0, rcWork.top - rc.top);
}
}
SetPosition(rc);
}
PRectangle Window::GetClientPosition() const {
RECT rc={0,0,0,0};
if (wid)
::GetClientRect(HwndFromWindowID(wid), &rc);
return PRectangle::FromInts(rc.left, rc.top, rc.right, rc.bottom);
}
void Window::Show(bool show) {
if (show)
::ShowWindow(HwndFromWindowID(wid), SW_SHOWNOACTIVATE);
else
::ShowWindow(HwndFromWindowID(wid), SW_HIDE);
}
void Window::InvalidateAll() {
::InvalidateRect(HwndFromWindowID(wid), nullptr, FALSE);
}
void Window::InvalidateRectangle(PRectangle rc) {
const RECT rcw = RectFromPRectangle(rc);
::InvalidateRect(HwndFromWindowID(wid), &rcw, FALSE);
}
namespace {
void FlipBitmap(HBITMAP bitmap, int width, int height) noexcept {
HDC hdc = ::CreateCompatibleDC({});
if (hdc) {
HBITMAP prevBmp = SelectBitmap(hdc, bitmap);
::StretchBlt(hdc, width - 1, 0, -width, height, hdc, 0, 0, width, height, SRCCOPY);
SelectBitmap(hdc, prevBmp);
::DeleteDC(hdc);
}
}
}
HCURSOR LoadReverseArrowCursor(UINT dpi) noexcept {
HCURSOR reverseArrowCursor {};
bool created = false;
HCURSOR cursor = ::LoadCursor({}, IDC_ARROW);
if (dpi != uSystemDPI) {
const int width = SystemMetricsForDpi(SM_CXCURSOR, dpi);
const int height = SystemMetricsForDpi(SM_CYCURSOR, dpi);
HCURSOR copy = static_cast<HCURSOR>(::CopyImage(cursor, IMAGE_CURSOR, width, height, LR_COPYFROMRESOURCE | LR_COPYRETURNORG));
if (copy) {
created = copy != cursor;
cursor = copy;
}
}
ICONINFO info;
if (::GetIconInfo(cursor, &info)) {
BITMAP bmp {};
if (::GetObject(info.hbmMask, sizeof(bmp), &bmp)) {
FlipBitmap(info.hbmMask, bmp.bmWidth, bmp.bmHeight);
if (info.hbmColor)
FlipBitmap(info.hbmColor, bmp.bmWidth, bmp.bmHeight);
info.xHotspot = bmp.bmWidth - 1 - info.xHotspot;
reverseArrowCursor = ::CreateIconIndirect(&info);
}
::DeleteObject(info.hbmMask);
if (info.hbmColor)
::DeleteObject(info.hbmColor);
}
if (created) {
::DestroyCursor(cursor);
}
return reverseArrowCursor;
}
void Window::SetCursor(Cursor curs) {
switch (curs) {
case Cursor::text:
::SetCursor(::LoadCursor(NULL,IDC_IBEAM));
break;
case Cursor::up:
::SetCursor(::LoadCursor(NULL,IDC_UPARROW));
break;
case Cursor::wait:
::SetCursor(::LoadCursor(NULL,IDC_WAIT));
break;
case Cursor::horizontal:
::SetCursor(::LoadCursor(NULL,IDC_SIZEWE));
break;
case Cursor::vertical:
::SetCursor(::LoadCursor(NULL,IDC_SIZENS));
break;
case Cursor::hand:
::SetCursor(::LoadCursor(NULL,IDC_HAND));
break;
case Cursor::reverseArrow:
case Cursor::arrow:
case Cursor::invalid: // Should not occur, but just in case.
::SetCursor(::LoadCursor(NULL,IDC_ARROW));
break;
}
}
/* Returns rectangle of monitor pt is on, both rect and pt are in Window's
coordinates */
PRectangle Window::GetMonitorRect(Point pt) {
const PRectangle rcPosition = GetPosition();
POINT ptDesktop = {static_cast<LONG>(pt.x + rcPosition.left),
static_cast<LONG>(pt.y + rcPosition.top)};
HMONITOR hMonitor = MonitorFromPoint(ptDesktop, MONITOR_DEFAULTTONEAREST);
const RECT rcWork = RectFromMonitor(hMonitor);
if (rcWork.left < rcWork.right) {
PRectangle rcMonitor(
rcWork.left - rcPosition.left,
rcWork.top - rcPosition.top,
rcWork.right - rcPosition.left,
rcWork.bottom - rcPosition.top);
return rcMonitor;
} else {
return PRectangle();
}
}
struct ListItemData {
const char *text;
int pixId;
};
class LineToItem {
std::vector<char> words;
std::vector<ListItemData> data;
public:
void Clear() noexcept {
words.clear();
data.clear();
}
ListItemData Get(size_t index) const noexcept {
if (index < data.size()) {
return data[index];
} else {
ListItemData missing = {"", -1};
return missing;
}
}
int Count() const noexcept {
return static_cast<int>(data.size());
}
void AllocItem(const char *text, int pixId) {
ListItemData lid = { text, pixId };
data.push_back(lid);
}
char *SetWords(const char *s) {
words = std::vector<char>(s, s+strlen(s)+1);
return &words[0];
}
};
const TCHAR ListBoxX_ClassName[] = TEXT("ListBoxX");
ListBox::ListBox() noexcept {
}
ListBox::~ListBox() noexcept {
}
class ListBoxX : public ListBox {
int lineHeight;
HFONT fontCopy;
Technology technology;
RGBAImageSet images;
LineToItem lti;
HWND lb;
bool unicodeMode;
int desiredVisibleRows;
unsigned int maxItemCharacters;
unsigned int aveCharWidth;
Window *parent;
int ctrlID;
UINT dpi;
IListBoxDelegate *delegate;
const char *widestItem;
unsigned int maxCharWidth;
WPARAM resizeHit;
PRectangle rcPreSize;
Point dragOffset;
Point location; // Caret location at which the list is opened
MouseWheelDelta wheelDelta;
ListOptions options;
DWORD frameStyle = WS_THICKFRAME;
HWND GetHWND() const noexcept;
void AppendListItem(const char *text, const char *numword);
void AdjustWindowRect(PRectangle *rc, UINT dpiAdjust) const noexcept;
int ItemHeight() const;
int MinClientWidth() const noexcept;
int TextOffset() const;
POINT GetClientExtent() const noexcept;
POINT MinTrackSize() const;
POINT MaxTrackSize() const;
void SetRedraw(bool on) noexcept;
void OnDoubleClick();
void OnSelChange();
void ResizeToCursor();
void StartResize(WPARAM);
LRESULT NcHitTest(WPARAM, LPARAM) const;
void CentreItem(int n);
void Paint(HDC);
static LRESULT PASCAL ControlWndProc(HWND hWnd, UINT iMessage, WPARAM wParam, LPARAM lParam);
static constexpr Point ItemInset {0, 0}; // Padding around whole item
static constexpr Point TextInset {2, 0}; // Padding around text
static constexpr Point ImageInset {1, 0}; // Padding around image
public:
ListBoxX() : lineHeight(10), fontCopy{}, technology(Technology::Default), lb{}, unicodeMode(false),
desiredVisibleRows(9), maxItemCharacters(0), aveCharWidth(8),
parent(nullptr), ctrlID(0), dpi(USER_DEFAULT_SCREEN_DPI),
delegate(nullptr),
widestItem(nullptr), maxCharWidth(1), resizeHit(0) {
}
ListBoxX(const ListBoxX &) = delete;
ListBoxX(ListBoxX &&) = delete;
ListBoxX &operator=(const ListBoxX &) = delete;
ListBoxX &operator=(ListBoxX &&) = delete;
~ListBoxX() noexcept override {
if (fontCopy) {
::DeleteObject(fontCopy);
fontCopy = 0;
}
}
void SetFont(const Font *font) override;
void Create(Window &parent_, int ctrlID_, Point location_, int lineHeight_, bool unicodeMode_, Technology technology_) override;
void SetAverageCharWidth(int width) override;
void SetVisibleRows(int rows) override;
int GetVisibleRows() const override;
PRectangle GetDesiredRect() override;
int CaretFromEdge() override;
void Clear() noexcept override;
void Append(char *s, int type = -1) override;
int Length() override;
void Select(int n) override;
int GetSelection() override;
int Find(const char *prefix) override;
std::string GetValue(int n) override;
void RegisterImage(int type, const char *xpm_data) override;
void RegisterRGBAImage(int type, int width, int height, const unsigned char *pixelsImage) override;
void ClearRegisteredImages() override;
void SetDelegate(IListBoxDelegate *lbDelegate) override;
void SetList(const char *list, char separator, char typesep) override;
void SetOptions(ListOptions options_) override;
void Draw(DRAWITEMSTRUCT *pDrawItem);
LRESULT WndProc(HWND hWnd, UINT iMessage, WPARAM wParam, LPARAM lParam);
static LRESULT PASCAL StaticWndProc(HWND hWnd, UINT iMessage, WPARAM wParam, LPARAM lParam);
};
std::unique_ptr<ListBox> ListBox::Allocate() {
return std::make_unique<ListBoxX>();
}
void ListBoxX::Create(Window &parent_, int ctrlID_, Point location_, int lineHeight_, bool unicodeMode_, Technology technology_) {
parent = &parent_;
ctrlID = ctrlID_;
location = location_;
lineHeight = lineHeight_;
unicodeMode = unicodeMode_;
technology = technology_;
HWND hwndParent = HwndFromWindow(*parent);
HINSTANCE hinstanceParent = GetWindowInstance(hwndParent);
// Window created as popup so not clipped within parent client area
wid = ::CreateWindowEx(
WS_EX_WINDOWEDGE, ListBoxX_ClassName, TEXT(""),
WS_POPUP | frameStyle,
100,100, 150,80, hwndParent,
NULL,
hinstanceParent,
this);
dpi = DpiForWindow(hwndParent);
POINT locationw = POINTFromPoint(location);
::MapWindowPoints(hwndParent, NULL, &locationw, 1);
location = PointFromPOINT(locationw);
}
void ListBoxX::SetFont(const Font *font) {
const FontWin *pfm = dynamic_cast<const FontWin *>(font);
if (pfm) {
if (fontCopy) {
::DeleteObject(fontCopy);
fontCopy = 0;
}
fontCopy = pfm->HFont();
SetWindowFont(lb, fontCopy, 0);
}
}
void ListBoxX::SetAverageCharWidth(int width) {
aveCharWidth = width;
}
void ListBoxX::SetVisibleRows(int rows) {
desiredVisibleRows = rows;
}
int ListBoxX::GetVisibleRows() const {
return desiredVisibleRows;
}
HWND ListBoxX::GetHWND() const noexcept {
return HwndFromWindowID(GetID());
}
PRectangle ListBoxX::GetDesiredRect() {
PRectangle rcDesired = GetPosition();
int rows = Length();
if ((rows == 0) || (rows > desiredVisibleRows))
rows = desiredVisibleRows;
rcDesired.bottom = rcDesired.top + ItemHeight() * rows;
int width = MinClientWidth();
HDC hdc = ::GetDC(lb);
HFONT oldFont = SelectFont(hdc, fontCopy);
SIZE textSize = {0, 0};
int len = 0;
if (widestItem) {
len = static_cast<int>(strlen(widestItem));
if (unicodeMode) {
const TextWide tbuf(widestItem, CpUtf8);
::GetTextExtentPoint32W(hdc, tbuf.buffer, tbuf.tlen, &textSize);
} else {
::GetTextExtentPoint32A(hdc, widestItem, len, &textSize);
}
}
TEXTMETRIC tm;
::GetTextMetrics(hdc, &tm);
maxCharWidth = tm.tmMaxCharWidth;
SelectFont(hdc, oldFont);
::ReleaseDC(lb, hdc);
const int widthDesired = std::max(textSize.cx, (len + 1) * tm.tmAveCharWidth);
if (width < widthDesired)
width = widthDesired;
rcDesired.right = rcDesired.left + TextOffset() + width + (TextInset.x * 2);
if (Length() > rows)
rcDesired.right += SystemMetricsForDpi(SM_CXVSCROLL, dpi);
AdjustWindowRect(&rcDesired, dpi);
return rcDesired;
}
int ListBoxX::TextOffset() const {
const int pixWidth = images.GetWidth();
return static_cast<int>(pixWidth == 0 ? ItemInset.x : ItemInset.x + pixWidth + (ImageInset.x * 2));
}
int ListBoxX::CaretFromEdge() {
PRectangle rc;
AdjustWindowRect(&rc, dpi);
return TextOffset() + static_cast<int>(TextInset.x + (0 - rc.left) - 1);
}
void ListBoxX::Clear() noexcept {
ListBox_ResetContent(lb);
maxItemCharacters = 0;
widestItem = nullptr;
lti.Clear();
}
void ListBoxX::Append(char *, int) {
// This method is no longer called in Scintilla
PLATFORM_ASSERT(false);
}
int ListBoxX::Length() {
return lti.Count();
}
void ListBoxX::Select(int n) {
// We are going to scroll to centre on the new selection and then select it, so disable
// redraw to avoid flicker caused by a painting new selection twice in unselected and then
// selected states
SetRedraw(false);
CentreItem(n);
ListBox_SetCurSel(lb, n);
OnSelChange();
SetRedraw(true);
}
int ListBoxX::GetSelection() {
return ListBox_GetCurSel(lb);
}
// This is not actually called at present
int ListBoxX::Find(const char *) {
return LB_ERR;
}
std::string ListBoxX::GetValue(int n) {
const ListItemData item = lti.Get(n);
return item.text;
}
void ListBoxX::RegisterImage(int type, const char *xpm_data) {
XPM xpmImage(xpm_data);
images.AddImage(type, std::make_unique<RGBAImage>(xpmImage));
}
void ListBoxX::RegisterRGBAImage(int type, int width, int height, const unsigned char *pixelsImage) {
images.AddImage(type, std::make_unique<RGBAImage>(width, height, 1.0f, pixelsImage));
}
void ListBoxX::ClearRegisteredImages() {
images.Clear();
}
namespace {
int ColourOfElement(std::optional<ColourRGBA> colour, int nIndex) {
if (colour.has_value()) {
return colour.value().OpaqueRGB();
} else {
return ::GetSysColor(nIndex);
}
}
void FillRectColour(HDC hdc, const RECT *lprc, int colour) noexcept {
const HBRUSH brush = ::CreateSolidBrush(colour);
::FillRect(hdc, lprc, brush);
::DeleteObject(brush);
}
}
void ListBoxX::Draw(DRAWITEMSTRUCT *pDrawItem) {
if ((pDrawItem->itemAction == ODA_SELECT) || (pDrawItem->itemAction == ODA_DRAWENTIRE)) {
RECT rcBox = pDrawItem->rcItem;
rcBox.left += TextOffset();
if (pDrawItem->itemState & ODS_SELECTED) {
RECT rcImage = pDrawItem->rcItem;
rcImage.right = rcBox.left;
// The image is not highlighted
FillRectColour(pDrawItem->hDC, &rcImage, ColourOfElement(options.back, COLOR_WINDOW));
FillRectColour(pDrawItem->hDC, &rcBox, ColourOfElement(options.backSelected, COLOR_HIGHLIGHT));
::SetBkColor(pDrawItem->hDC, ColourOfElement(options.backSelected, COLOR_HIGHLIGHT));
::SetTextColor(pDrawItem->hDC, ColourOfElement(options.foreSelected, COLOR_HIGHLIGHTTEXT));
} else {
FillRectColour(pDrawItem->hDC, &pDrawItem->rcItem, ColourOfElement(options.back, COLOR_WINDOW));
::SetBkColor(pDrawItem->hDC, ColourOfElement(options.back, COLOR_WINDOW));
::SetTextColor(pDrawItem->hDC, ColourOfElement(options.fore, COLOR_WINDOWTEXT));
}
const ListItemData item = lti.Get(pDrawItem->itemID);
const int pixId = item.pixId;
const char *text = item.text;
const int len = static_cast<int>(strlen(text));
RECT rcText = rcBox;
::InsetRect(&rcText, static_cast<int>(TextInset.x), static_cast<int>(TextInset.y));
if (unicodeMode) {
const TextWide tbuf(text, CpUtf8);
::DrawTextW(pDrawItem->hDC, tbuf.buffer, tbuf.tlen, &rcText, DT_NOPREFIX|DT_END_ELLIPSIS|DT_SINGLELINE|DT_NOCLIP);
} else {
::DrawTextA(pDrawItem->hDC, text, len, &rcText, DT_NOPREFIX|DT_END_ELLIPSIS|DT_SINGLELINE|DT_NOCLIP);
}
// Draw the image, if any
const RGBAImage *pimage = images.Get(pixId);
if (pimage) {
std::unique_ptr<Surface> surfaceItem(Surface::Allocate(technology));
if (technology == Technology::Default) {
surfaceItem->Init(pDrawItem->hDC, pDrawItem->hwndItem);
const long left = pDrawItem->rcItem.left + static_cast<int>(ItemInset.x + ImageInset.x);
const PRectangle rcImage = PRectangle::FromInts(left, pDrawItem->rcItem.top,
left + images.GetWidth(), pDrawItem->rcItem.bottom);
surfaceItem->DrawRGBAImage(rcImage,
pimage->GetWidth(), pimage->GetHeight(), pimage->Pixels());
::SetTextAlign(pDrawItem->hDC, TA_TOP);
} else {
#if defined(USE_D2D)
const D2D1_RENDER_TARGET_PROPERTIES props = D2D1::RenderTargetProperties(
D2D1_RENDER_TARGET_TYPE_DEFAULT,
D2D1::PixelFormat(
DXGI_FORMAT_B8G8R8A8_UNORM,
D2D1_ALPHA_MODE_IGNORE),
0,
0,
D2D1_RENDER_TARGET_USAGE_NONE,
D2D1_FEATURE_LEVEL_DEFAULT
);
ID2D1DCRenderTarget *pDCRT = nullptr;
HRESULT hr = pD2DFactory->CreateDCRenderTarget(&props, &pDCRT);
if (SUCCEEDED(hr) && pDCRT) {
const long left = pDrawItem->rcItem.left + static_cast<long>(ItemInset.x + ImageInset.x);
RECT rcItem = pDrawItem->rcItem;
rcItem.left = left;
rcItem.right = rcItem.left + images.GetWidth();
hr = pDCRT->BindDC(pDrawItem->hDC, &rcItem);
if (SUCCEEDED(hr)) {
surfaceItem->Init(pDCRT, pDrawItem->hwndItem);
pDCRT->BeginDraw();
const PRectangle rcImage = PRectangle::FromInts(0, 0, images.GetWidth(), rcItem.bottom - rcItem.top);
surfaceItem->DrawRGBAImage(rcImage,
pimage->GetWidth(), pimage->GetHeight(), pimage->Pixels());
pDCRT->EndDraw();
ReleaseUnknown(pDCRT);
}
}
#endif
}
}
}
}
void ListBoxX::AppendListItem(const char *text, const char *numword) {
int pixId = -1;
if (numword) {
pixId = 0;
char ch;
while ((ch = *++numword) != '\0') {
pixId = 10 * pixId + (ch - '0');
}
}
lti.AllocItem(text, pixId);
const unsigned int len = static_cast<unsigned int>(strlen(text));
if (maxItemCharacters < len) {
maxItemCharacters = len;
widestItem = text;
}
}
void ListBoxX::SetDelegate(IListBoxDelegate *lbDelegate) {
delegate = lbDelegate;
}
void ListBoxX::SetList(const char *list, char separator, char typesep) {
// Turn off redraw while populating the list - this has a significant effect, even if
// the listbox is not visible.
SetRedraw(false);
Clear();
const size_t size = strlen(list);
char *words = lti.SetWords(list);
char *startword = words;
char *numword = nullptr;
for (size_t i=0; i < size; i++) {
if (words[i] == separator) {
words[i] = '\0';
if (numword)
*numword = '\0';
AppendListItem(startword, numword);
startword = words + i + 1;
numword = nullptr;
} else if (words[i] == typesep) {
numword = words + i;
}
}
if (startword) {
if (numword)
*numword = '\0';
AppendListItem(startword, numword);
}
// Finally populate the listbox itself with the correct number of items
const int count = lti.Count();
::SendMessage(lb, LB_INITSTORAGE, count, 0);
for (intptr_t j=0; j<count; j++) {
ListBox_AddItemData(lb, j+1);
}
SetRedraw(true);
}
void ListBoxX::SetOptions(ListOptions options_) {
options = options_;
frameStyle = FlagSet(options.options, AutoCompleteOption::FixedSize) ? WS_BORDER : WS_THICKFRAME;
}
void ListBoxX::AdjustWindowRect(PRectangle *rc, UINT dpiAdjust) const noexcept {
RECT rcw = RectFromPRectangle(*rc);
if (fnAdjustWindowRectExForDpi) {
fnAdjustWindowRectExForDpi(&rcw, frameStyle, false, WS_EX_WINDOWEDGE, dpiAdjust);
} else {
::AdjustWindowRectEx(&rcw, frameStyle, false, WS_EX_WINDOWEDGE);
}
*rc = PRectangle::FromInts(rcw.left, rcw.top, rcw.right, rcw.bottom);
}
int ListBoxX::ItemHeight() const {
int itemHeight = lineHeight + (static_cast<int>(TextInset.y) * 2);
const int pixHeight = images.GetHeight() + (static_cast<int>(ImageInset.y) * 2);
if (itemHeight < pixHeight) {
itemHeight = pixHeight;
}
return itemHeight;
}
int ListBoxX::MinClientWidth() const noexcept {
return 12 * (aveCharWidth+aveCharWidth/3);
}
POINT ListBoxX::MinTrackSize() const {
PRectangle rc = PRectangle::FromInts(0, 0, MinClientWidth(), ItemHeight());
AdjustWindowRect(&rc, dpi);
POINT ret = {static_cast<LONG>(rc.Width()), static_cast<LONG>(rc.Height())};
return ret;
}
POINT ListBoxX::MaxTrackSize() const {
PRectangle rc = PRectangle::FromInts(0, 0,
std::max(static_cast<unsigned int>(MinClientWidth()),
maxCharWidth * maxItemCharacters + static_cast<int>(TextInset.x) * 2 +
TextOffset() + SystemMetricsForDpi(SM_CXVSCROLL, dpi)),
ItemHeight() * lti.Count());
AdjustWindowRect(&rc, dpi);
POINT ret = {static_cast<LONG>(rc.Width()), static_cast<LONG>(rc.Height())};
return ret;
}
void ListBoxX::SetRedraw(bool on) noexcept {
::SendMessage(lb, WM_SETREDRAW, on, 0);
if (on)
::InvalidateRect(lb, nullptr, TRUE);
}
void ListBoxX::ResizeToCursor() {
PRectangle rc = GetPosition();
POINT ptw;
::GetCursorPos(&ptw);
const Point pt = PointFromPOINT(ptw) + dragOffset;
switch (resizeHit) {
case HTLEFT:
rc.left = pt.x;
break;
case HTRIGHT:
rc.right = pt.x;
break;
case HTTOP:
rc.top = pt.y;
break;
case HTTOPLEFT:
rc.top = pt.y;
rc.left = pt.x;
break;
case HTTOPRIGHT:
rc.top = pt.y;
rc.right = pt.x;
break;
case HTBOTTOM:
rc.bottom = pt.y;
break;
case HTBOTTOMLEFT:
rc.bottom = pt.y;
rc.left = pt.x;
break;
case HTBOTTOMRIGHT:
rc.bottom = pt.y;
rc.right = pt.x;
break;
default:
break;
}
const POINT ptMin = MinTrackSize();
const POINT ptMax = MaxTrackSize();
// We don't allow the left edge to move at present, but just in case
rc.left = std::clamp(rc.left, rcPreSize.right - ptMax.x, rcPreSize.right - ptMin.x);
rc.top = std::clamp(rc.top, rcPreSize.bottom - ptMax.y, rcPreSize.bottom - ptMin.y);
rc.right = std::clamp(rc.right, rcPreSize.left + ptMin.x, rcPreSize.left + ptMax.x);
rc.bottom = std::clamp(rc.bottom, rcPreSize.top + ptMin.y, rcPreSize.top + ptMax.y);
SetPosition(rc);
}
void ListBoxX::StartResize(WPARAM hitCode) {
rcPreSize = GetPosition();
POINT cursorPos;
::GetCursorPos(&cursorPos);
switch (hitCode) {
case HTRIGHT:
case HTBOTTOM:
case HTBOTTOMRIGHT:
dragOffset.x = rcPreSize.right - cursorPos.x;
dragOffset.y = rcPreSize.bottom - cursorPos.y;
break;
case HTTOPRIGHT:
dragOffset.x = rcPreSize.right - cursorPos.x;
dragOffset.y = rcPreSize.top - cursorPos.y;
break;
// Note that the current hit test code prevents the left edge cases ever firing
// as we don't want the left edge to be movable
case HTLEFT:
case HTTOP:
case HTTOPLEFT:
dragOffset.x = rcPreSize.left - cursorPos.x;
dragOffset.y = rcPreSize.top - cursorPos.y;
break;
case HTBOTTOMLEFT:
dragOffset.x = rcPreSize.left - cursorPos.x;
dragOffset.y = rcPreSize.bottom - cursorPos.y;
break;
default:
return;
}
::SetCapture(GetHWND());
resizeHit = hitCode;
}
LRESULT ListBoxX::NcHitTest(WPARAM wParam, LPARAM lParam) const {
const PRectangle rc = GetPosition();
LRESULT hit = ::DefWindowProc(GetHWND(), WM_NCHITTEST, wParam, lParam);
// There is an apparent bug in the DefWindowProc hit test code whereby it will
// return HTTOPXXX if the window in question is shorter than the default
// window caption height + frame, even if one is hovering over the bottom edge of
// the frame, so workaround that here
if (hit >= HTTOP && hit <= HTTOPRIGHT) {
const int minHeight = SystemMetricsForDpi(SM_CYMINTRACK, dpi);
const int yPos = GET_Y_LPARAM(lParam);
if ((rc.Height() < minHeight) && (yPos > ((rc.top + rc.bottom)/2))) {
hit += HTBOTTOM - HTTOP;
}
}
// Never permit resizing that moves the left edge. Allow movement of top or bottom edge
// depending on whether the list is above or below the caret
switch (hit) {
case HTLEFT:
case HTTOPLEFT:
case HTBOTTOMLEFT:
hit = HTERROR;
break;
case HTTOP:
case HTTOPRIGHT: {
// Valid only if caret below list
if (location.y < rc.top)
hit = HTERROR;
}
break;
case HTBOTTOM:
case HTBOTTOMRIGHT: {
// Valid only if caret above list
if (rc.bottom <= location.y)
hit = HTERROR;
}
break;
default:
break;
}
return hit;
}
void ListBoxX::OnDoubleClick() {
if (delegate) {
ListBoxEvent event(ListBoxEvent::EventType::doubleClick);
delegate->ListNotify(&event);
}
}
void ListBoxX::OnSelChange() {
if (delegate) {
ListBoxEvent event(ListBoxEvent::EventType::selectionChange);
delegate->ListNotify(&event);
}
}
POINT ListBoxX::GetClientExtent() const noexcept {
RECT rc;
::GetWindowRect(HwndFromWindowID(wid), &rc);
POINT ret { rc.right - rc.left, rc.bottom - rc.top };
return ret;
}
void ListBoxX::CentreItem(int n) {
// If below mid point, scroll up to centre, but with more items below if uneven
if (n >= 0) {
const POINT extent = GetClientExtent();
const int visible = extent.y/ItemHeight();
if (visible < Length()) {
const int top = ListBox_GetTopIndex(lb);
const int half = (visible - 1) / 2;
if (n > (top + half))
ListBox_SetTopIndex(lb, n - half);
}
}
}
// Performs a double-buffered paint operation to avoid flicker
void ListBoxX::Paint(HDC hDC) {
const POINT extent = GetClientExtent();
HBITMAP hBitmap = ::CreateCompatibleBitmap(hDC, extent.x, extent.y);
HDC bitmapDC = ::CreateCompatibleDC(hDC);
HBITMAP hBitmapOld = SelectBitmap(bitmapDC, hBitmap);
// The list background is mainly erased during painting, but can be a small
// unpainted area when at the end of a non-integrally sized list with a
// vertical scroll bar
const RECT rc = { 0, 0, extent.x, extent.y };
FillRectColour(bitmapDC, &rc, ColourOfElement(options.back, COLOR_WINDOWTEXT));
// Paint the entire client area and vertical scrollbar
::SendMessage(lb, WM_PRINT, reinterpret_cast<WPARAM>(bitmapDC), PRF_CLIENT|PRF_NONCLIENT);
::BitBlt(hDC, 0, 0, extent.x, extent.y, bitmapDC, 0, 0, SRCCOPY);
// Select a stock brush to prevent warnings from BoundsChecker
SelectBrush(bitmapDC, GetStockBrush(WHITE_BRUSH));
SelectBitmap(bitmapDC, hBitmapOld);
::DeleteDC(bitmapDC);
::DeleteObject(hBitmap);
}
LRESULT PASCAL ListBoxX::ControlWndProc(HWND hWnd, UINT iMessage, WPARAM wParam, LPARAM lParam) {
try {
ListBoxX *lbx = static_cast<ListBoxX *>(PointerFromWindow(::GetParent(hWnd)));
switch (iMessage) {
case WM_ERASEBKGND:
return TRUE;
case WM_PAINT: {
PAINTSTRUCT ps;
HDC hDC = ::BeginPaint(hWnd, &ps);
if (lbx) {
lbx->Paint(hDC);
}
::EndPaint(hWnd, &ps);
}
return 0;
case WM_MOUSEACTIVATE:
// This prevents the view activating when the scrollbar is clicked
return MA_NOACTIVATE;
case WM_LBUTTONDOWN: {
// We must take control of selection to prevent the ListBox activating
// the popup
const LRESULT lResult = ::SendMessage(hWnd, LB_ITEMFROMPOINT, 0, lParam);
if (HIWORD(lResult) == 0) {
ListBox_SetCurSel(hWnd, LOWORD(lResult));
if (lbx) {
lbx->OnSelChange();
}
}
}
return 0;
case WM_LBUTTONUP:
return 0;
case WM_LBUTTONDBLCLK: {
if (lbx) {
lbx->OnDoubleClick();
}
}
return 0;
case WM_MBUTTONDOWN:
// disable the scroll wheel button click action
return 0;
default:
break;
}
WNDPROC prevWndProc = reinterpret_cast<WNDPROC>(GetWindowLongPtr(hWnd, GWLP_USERDATA));
if (prevWndProc) {
return ::CallWindowProc(prevWndProc, hWnd, iMessage, wParam, lParam);
} else {
return ::DefWindowProc(hWnd, iMessage, wParam, lParam);
}
} catch (...) {
}
return ::DefWindowProc(hWnd, iMessage, wParam, lParam);
}
LRESULT ListBoxX::WndProc(HWND hWnd, UINT iMessage, WPARAM wParam, LPARAM lParam) {
switch (iMessage) {
case WM_CREATE: {
HINSTANCE hinstanceParent = GetWindowInstance(HwndFromWindow(*parent));
// Note that LBS_NOINTEGRALHEIGHT is specified to fix cosmetic issue when resizing the list
// but has useful side effect of speeding up list population significantly
lb = ::CreateWindowEx(
0, TEXT("listbox"), TEXT(""),
WS_CHILD | WS_VSCROLL | WS_VISIBLE |
LBS_OWNERDRAWFIXED | LBS_NODATA | LBS_NOINTEGRALHEIGHT,
0, 0, 150,80, hWnd,
reinterpret_cast<HMENU>(static_cast<ptrdiff_t>(ctrlID)),
hinstanceParent,
0);
WNDPROC prevWndProc = SubclassWindow(lb, ControlWndProc);
::SetWindowLongPtr(lb, GWLP_USERDATA, reinterpret_cast<LONG_PTR>(prevWndProc));
}
break;
case WM_SIZE:
if (lb) {
SetRedraw(false);
::SetWindowPos(lb, 0, 0,0, LOWORD(lParam), HIWORD(lParam), SWP_NOZORDER|SWP_NOACTIVATE|SWP_NOMOVE);
// Ensure the selection remains visible
CentreItem(GetSelection());
SetRedraw(true);
}
break;
case WM_PAINT: {
PAINTSTRUCT ps;
::BeginPaint(hWnd, &ps);
::EndPaint(hWnd, &ps);
}
break;
case WM_COMMAND:
// This is not actually needed now - the registered double click action is used
// directly to action a choice from the list.
::SendMessage(HwndFromWindow(*parent), iMessage, wParam, lParam);
break;
case WM_MEASUREITEM: {
MEASUREITEMSTRUCT *pMeasureItem = reinterpret_cast<MEASUREITEMSTRUCT *>(lParam);
pMeasureItem->itemHeight = ItemHeight();
}
break;
case WM_DRAWITEM:
Draw(reinterpret_cast<DRAWITEMSTRUCT *>(lParam));
break;
case WM_DESTROY:
lb = 0;
SetWindowPointer(hWnd, nullptr);
return ::DefWindowProc(hWnd, iMessage, wParam, lParam);
case WM_ERASEBKGND:
// To reduce flicker we can elide background erasure since this window is
// completely covered by its child.
return TRUE;
case WM_GETMINMAXINFO: {
MINMAXINFO *minMax = reinterpret_cast<MINMAXINFO*>(lParam);
minMax->ptMaxTrackSize = MaxTrackSize();
minMax->ptMinTrackSize = MinTrackSize();
}
break;
case WM_MOUSEACTIVATE:
return MA_NOACTIVATE;
case WM_NCHITTEST:
return NcHitTest(wParam, lParam);
case WM_NCLBUTTONDOWN:
// We have to implement our own window resizing because the DefWindowProc
// implementation insists on activating the resized window
StartResize(wParam);
return 0;
case WM_MOUSEMOVE: {
if (resizeHit == 0) {
return ::DefWindowProc(hWnd, iMessage, wParam, lParam);
} else {
ResizeToCursor();
}
}
break;
case WM_LBUTTONUP:
case WM_CANCELMODE:
if (resizeHit != 0) {
resizeHit = 0;
::ReleaseCapture();
}
return ::DefWindowProc(hWnd, iMessage, wParam, lParam);
case WM_MOUSEWHEEL:
if (wheelDelta.Accumulate(wParam)) {
const int nRows = GetVisibleRows();
int linesToScroll = std::clamp(nRows - 1, 1, 3);
linesToScroll *= wheelDelta.Actions();
int top = ListBox_GetTopIndex(lb) + linesToScroll;
if (top < 0) {
top = 0;
}
ListBox_SetTopIndex(lb, top);
}
break;
default:
return ::DefWindowProc(hWnd, iMessage, wParam, lParam);
}
return 0;
}
LRESULT PASCAL ListBoxX::StaticWndProc(
HWND hWnd, UINT iMessage, WPARAM wParam, LPARAM lParam) {
if (iMessage == WM_CREATE) {
CREATESTRUCT *pCreate = reinterpret_cast<CREATESTRUCT *>(lParam);
SetWindowPointer(hWnd, pCreate->lpCreateParams);
}
// Find C++ object associated with window.
ListBoxX *lbx = static_cast<ListBoxX *>(PointerFromWindow(hWnd));
if (lbx) {
return lbx->WndProc(hWnd, iMessage, wParam, lParam);
} else {
return ::DefWindowProc(hWnd, iMessage, wParam, lParam);
}
}
namespace {
bool ListBoxX_Register() noexcept {
WNDCLASSEX wndclassc {};
wndclassc.cbSize = sizeof(wndclassc);
// We need CS_HREDRAW and CS_VREDRAW because of the ellipsis that might be drawn for
// truncated items in the list and the appearance/disappearance of the vertical scroll bar.
// The list repaint is double-buffered to avoid the flicker this would otherwise cause.
wndclassc.style = CS_GLOBALCLASS | CS_HREDRAW | CS_VREDRAW;
wndclassc.cbWndExtra = sizeof(ListBoxX *);
wndclassc.hInstance = hinstPlatformRes;
wndclassc.lpfnWndProc = ListBoxX::StaticWndProc;
wndclassc.hCursor = ::LoadCursor(NULL, IDC_ARROW);
wndclassc.lpszClassName = ListBoxX_ClassName;
return ::RegisterClassEx(&wndclassc) != 0;
}
void ListBoxX_Unregister() noexcept {
if (hinstPlatformRes) {
::UnregisterClass(ListBoxX_ClassName, hinstPlatformRes);
}
}
}
Menu::Menu() noexcept : mid{} {
}
void Menu::CreatePopUp() {
Destroy();
mid = ::CreatePopupMenu();
}
void Menu::Destroy() noexcept {
if (mid)
::DestroyMenu(static_cast<HMENU>(mid));
mid = 0;
}
void Menu::Show(Point pt, const Window &w) {
::TrackPopupMenu(static_cast<HMENU>(mid),
TPM_RIGHTBUTTON, static_cast<int>(pt.x - 4), static_cast<int>(pt.y), 0,
HwndFromWindow(w), nullptr);
Destroy();
}
ColourRGBA Platform::Chrome() {
return ColourRGBA::FromRGB(static_cast<int>(::GetSysColor(COLOR_3DFACE)));
}
ColourRGBA Platform::ChromeHighlight() {
return ColourRGBA::FromRGB(static_cast<int>(::GetSysColor(COLOR_3DHIGHLIGHT)));
}
const char *Platform::DefaultFont() {
return "Verdana";
}
int Platform::DefaultFontSize() {
return 8;
}
unsigned int Platform::DoubleClickTime() {
return ::GetDoubleClickTime();
}
void Platform::DebugDisplay(const char *s) noexcept {
::OutputDebugStringA(s);
}
//#define TRACE
#ifdef TRACE
void Platform::DebugPrintf(const char *format, ...) noexcept {
char buffer[2000];
va_list pArguments;
va_start(pArguments, format);
vsprintf(buffer,format,pArguments);
va_end(pArguments);
Platform::DebugDisplay(buffer);
}
#else
void Platform::DebugPrintf(const char *, ...) noexcept {
}
#endif
static bool assertionPopUps = true;
bool Platform::ShowAssertionPopUps(bool assertionPopUps_) noexcept {
const bool ret = assertionPopUps;
assertionPopUps = assertionPopUps_;
return ret;
}
void Platform::Assert(const char *c, const char *file, int line) noexcept {
char buffer[2000] {};
sprintf(buffer, "Assertion [%s] failed at %s %d%s", c, file, line, assertionPopUps ? "" : "\r\n");
if (assertionPopUps) {
const int idButton = ::MessageBoxA(0, buffer, "Assertion failure",
MB_ABORTRETRYIGNORE|MB_ICONHAND|MB_SETFOREGROUND|MB_TASKMODAL);
if (idButton == IDRETRY) {
::DebugBreak();
} else if (idButton == IDIGNORE) {
// all OK
} else {
abort();
}
} else {
Platform::DebugDisplay(buffer);
::DebugBreak();
abort();
}
}
void Platform_Initialise(void *hInstance) noexcept {
hinstPlatformRes = static_cast<HINSTANCE>(hInstance);
LoadDpiForWindow();
ListBoxX_Register();
}
void Platform_Finalise(bool fromDllMain) noexcept {
#if defined(USE_D2D)
if (!fromDllMain) {
ReleaseUnknown(pIDWriteFactory);
ReleaseUnknown(pD2DFactory);
if (hDLLDWrite) {
FreeLibrary(hDLLDWrite);
hDLLDWrite = {};
}
if (hDLLD2D) {
FreeLibrary(hDLLD2D);
hDLLD2D = {};
}
}
#endif
if (!fromDllMain && hDLLShcore) {
FreeLibrary(hDLLShcore);
hDLLShcore = {};
}
ListBoxX_Unregister();
}
}
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