You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
104 lines
2.2 KiB
104 lines
2.2 KiB
/*
|
|
* QuartzTextLayout.h
|
|
*
|
|
* Original Code by Evan Jones on Wed Oct 02 2002.
|
|
* Contributors:
|
|
* Shane Caraveo, ActiveState
|
|
* Bernd Paradies, Adobe
|
|
*
|
|
*/
|
|
|
|
#ifndef _QUARTZ_TEXT_LAYOUT_H
|
|
#define _QUARTZ_TEXT_LAYOUT_H
|
|
|
|
#include <Cocoa/Cocoa.h>
|
|
|
|
#include "QuartzTextStyle.h"
|
|
|
|
|
|
class QuartzTextLayout
|
|
{
|
|
public:
|
|
/** Create a text layout for drawing on the specified context. */
|
|
QuartzTextLayout( CGContextRef context )
|
|
{
|
|
mString = NULL;
|
|
mLine = NULL;
|
|
setContext(context);
|
|
}
|
|
|
|
~QuartzTextLayout()
|
|
{
|
|
if ( mString != NULL )
|
|
{
|
|
CFRelease(mString);
|
|
mString = NULL;
|
|
}
|
|
if ( mLine != NULL )
|
|
{
|
|
CFRelease(mLine);
|
|
mLine = NULL;
|
|
}
|
|
}
|
|
|
|
inline void setText( const UInt8* buffer, size_t byteLength, const QuartzTextStyle& r )
|
|
{
|
|
CFStringRef str = CFStringCreateWithBytes( NULL, buffer, byteLength, kCFStringEncodingUTF8, false );
|
|
if (!str)
|
|
return;
|
|
|
|
CFMutableDictionaryRef stringAttribs = r.getCTStyle();
|
|
|
|
if (mString != NULL)
|
|
CFRelease(mString);
|
|
mString = ::CFAttributedStringCreate(NULL, str, stringAttribs);
|
|
|
|
if (mLine != NULL)
|
|
CFRelease(mLine);
|
|
mLine = ::CTLineCreateWithAttributedString(mString);
|
|
|
|
CFRelease( str );
|
|
}
|
|
|
|
/** Draw the text layout into the current CGContext at the specified position.
|
|
* @param x The x axis position to draw the baseline in the current CGContext.
|
|
* @param y The y axis position to draw the baseline in the current CGContext. */
|
|
void draw( float x, float y )
|
|
{
|
|
if (mLine == NULL)
|
|
return;
|
|
|
|
::CGContextSetTextMatrix(gc, CGAffineTransformMakeScale(1.0, -1.0));
|
|
|
|
// Set the text drawing position.
|
|
::CGContextSetTextPosition(gc, x, y);
|
|
|
|
// And finally, draw!
|
|
::CTLineDraw(mLine, gc);
|
|
}
|
|
|
|
float MeasureStringWidth()
|
|
{
|
|
if (mLine == NULL)
|
|
return 0.0f;
|
|
|
|
return ::CTLineGetTypographicBounds(mLine, NULL, NULL, NULL);
|
|
}
|
|
|
|
CTLineRef getCTLine() {
|
|
return mLine;
|
|
}
|
|
|
|
inline void setContext (CGContextRef context)
|
|
{
|
|
gc = context;
|
|
}
|
|
|
|
private:
|
|
CGContextRef gc;
|
|
CFAttributedStringRef mString;
|
|
CTLineRef mLine;
|
|
};
|
|
|
|
#endif
|