axmol/cocos2dx/label_nodes/CCFontRenderIOS.mm

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2013-07-11 02:59:05 +08:00
//
// CCFontRenderIOS.mm
// TestNewStringStuff
//
// Created by Carlo Morgantini on 5/28/13.
//
//
#include <CoreGraphics/CoreGraphics.h>
#include <UIKit/UIKit.h>
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#include "cocos2d.h"
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#include "CCTextImage.h"
#include "CCFontRenderIOS.h"
NS_CC_BEGIN
unsigned char * FontRenderIOS::preparePageGlyphData(TextPageDef *thePage, char *fontName, int fontSize)
{
// constants
float LINE_PADDING = 1.9;
if (!thePage)
return NULL;
if (thePage->getNumLines() == 0)
return NULL;
int pageWidth = thePage->getWidth();
int pageHeight = thePage->getHeight();
// prepare memory ans set to 0
int sizeInBytes = (pageWidth * pageHeight * 4);
unsigned char* data = new unsigned char[sizeInBytes];
memset(data, 0, sizeInBytes);
// prepare the context
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
CGContextRef context = CGBitmapContextCreate(data, pageWidth, pageHeight, 8, pageWidth * 4, colorSpace, kCGImageAlphaPremultipliedLast | kCGBitmapByteOrder32Big);
CGColorSpaceRelease(colorSpace);
if (!context)
{
delete[] data;
return 0;
}
// prepare the context
CGContextSetRGBFillColor(context, 1, 1, 1, 1);
CGContextTranslateCTM(context, 0.0f, pageHeight);
CGContextScaleCTM(context, 1.0f, -1.0f); //NOTE: NSString draws in UIKit referential i.e. renders upside-down compared to CGBitmapContext referential
UIGraphicsPushContext(context);
UITextAlignment align = NSTextAlignmentLeft;
// create the font
NSString *nsFontName = [NSString stringWithUTF8String:fontName];
id font = [UIFont fontWithName:nsFontName size:fontSize];
int numLines = thePage->getNumLines();
for (int c = 0; c<numLines; ++c)
{
TextLineDef *pCurrentLine = thePage->getLineAt(c);
float lineHeight = pCurrentLine->getHeight();
float origX = LINE_PADDING;
float origY = pCurrentLine->getY();
int numGlyphToRender = pCurrentLine->getNumGlyph();
for (int cglyph = 0; cglyph < numGlyphToRender; ++cglyph)
{
GlyphDef currGlyph = pCurrentLine->getGlyphAt(cglyph);
NSString *lineString = [NSString stringWithFormat: @"%C", currGlyph.getUTF8Letter()];
CGRect tempRect;
tempRect.origin.x = (origX - currGlyph.getRect().origin.x);
tempRect.origin.y = origY;
tempRect.size.width = currGlyph.getRect().size.width;
tempRect.size.height = lineHeight;
// actually draw one character
[lineString drawInRect: tempRect withFont:font lineBreakMode:NSLineBreakByWordWrapping alignment:align];
// move to next character
origX += (tempRect.size.width + currGlyph.getPadding());
}
}
// clean everything
UIGraphicsPopContext();
CGContextRelease(context);
// everything looks good
return data;
}
NS_CC_END