/*===== IMPORTANT =====This is sample code demonstrating API, technology or techniques in development.Although this sample code has been reviewed for technical accuracy, it is notfinal. Apple is supplying this information to help you plan for the adoption ofthe technologies and programming interfaces described herein. This informationis subject to change, and software implemented based on this sample code shouldbe tested with final operating system software and final documentation. Newerversions of this sample code may be provided with future seeds of the API ortechnology. For information about updates to this and other developerdocumentation, view the New & Updated sidebars in subsequent documentationseeds.=====================File: Texture2D.mAbstract: Creates OpenGL 2D textures from images or text.Version: 1.6Disclaimer: IMPORTANT:  This Apple software is supplied to you by Apple Inc.("Apple") in consideration of your agreement to the following terms, and youruse, installation, modification or redistribution of this Apple softwareconstitutes acceptance of these terms.  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All Rights Reserved.*/#import <OpenGLES/ES1/glext.h>#import "Texture2D.h"#import "PVRTexture.h"//CONSTANTS:#define kMaxTextureSize	 1024//CLASS IMPLEMENTATIONS:// Default Min/Mag texture filterstatic ccTexParams _texParams = { GL_LINEAR, GL_LINEAR, GL_CLAMP_TO_EDGE, GL_CLAMP_TO_EDGE };static ccTexParams _texParamsCopy;@implementation Texture2D@synthesize contentSize=_size, pixelFormat=_format, pixelsWide=_width, pixelsHigh=_height, name=_name, maxS=_maxS, maxT=_maxT;- (id) initWithData:(const void*)data pixelFormat:(Texture2DPixelFormat)pixelFormat pixelsWide:(NSUInteger)width pixelsHigh:(NSUInteger)height contentSize:(CGSize)size{	GLint					saveName;	if((self = [super init])) {		glGenTextures(1, &_name);		glGetIntegerv(GL_TEXTURE_BINDING_2D, &saveName);		glBindTexture(GL_TEXTURE_2D, _name);		[Texture2D applyTexParameters];				switch(pixelFormat) {						case kTexture2DPixelFormat_RGBA8888:				glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);				break;			case kTexture2DPixelFormat_RGB565:				glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_SHORT_5_6_5, data);				break;			case kTexture2DPixelFormat_A8:				glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, width, height, 0, GL_ALPHA, GL_UNSIGNED_BYTE, data);				break;			default:				[NSException raise:NSInternalInconsistencyException format:@""];					}		glBindTexture(GL_TEXTURE_2D, saveName);			_size = size;		_width = width;		_height = height;		_format = pixelFormat;		_maxS = size.width / (float)width;		_maxT = size.height / (float)height;	}						return self;}- (void) dealloc{#if DEBUG	NSLog(@"deallocing: %@", self);#endif	if(_name)		glDeleteTextures(1, &_name);		[super dealloc];}- (NSString*) description{	return [NSString stringWithFormat:@"<%@ = %08X | Name = %i | Dimensions = %ix%i | Coordinates = (%.2f, %.2f)>", [self class], self, _name, _width, _height, _maxS, _maxT];}@end@implementation Texture2D (Image)	- (id) initWithImage:(UIImage *)uiImage{	NSUInteger				width,							height,							i;	CGContextRef			context = nil;	void*					data = nil;;	CGColorSpaceRef			colorSpace;	void*					tempData;	unsigned int*			inPixel32;	unsigned short*			outPixel16;	BOOL					hasAlpha;	CGImageAlphaInfo		info;	CGAffineTransform		transform;	CGSize					imageSize;	Texture2DPixelFormat    pixelFormat;	CGImageRef				image;	BOOL					sizeToFit = NO;			image = [uiImage CGImage];		if(image == NULL) {		[self release];		NSLog(@"Image is Null");		return nil;	}		info = CGImageGetAlphaInfo(image);	hasAlpha = ((info == kCGImageAlphaPremultipliedLast) || (info == kCGImageAlphaPremultipliedFirst) || (info == kCGImageAlphaLast) || (info == kCGImageAlphaFirst) ? YES : NO);	size_t bpp = CGImageGetBitsPerComponent(image);	if(CGImageGetColorSpace(image)) {		if(hasAlpha || bpp >= 8)			pixelFormat = kTexture2DPixelFormat_RGBA8888;		else			pixelFormat = kTexture2DPixelFormat_RGB565;	} else  //NOTE: No colorspace means a mask image		pixelFormat = kTexture2DPixelFormat_A8;			imageSize = CGSizeMake(CGImageGetWidth(image), CGImageGetHeight(image));	transform = CGAffineTransformIdentity;	width = imageSize.width;		if((width != 1) && (width & (width - 1))) {		i = 1;		while((sizeToFit ? 2 * i : i) < width)			i *= 2;		width = i;	}	height = imageSize.height;	if((height != 1) && (height & (height - 1))) {		i = 1;		while((sizeToFit ? 2 * i : i) < height)			i *= 2;		height = i;	}	while((width > kMaxTextureSize) || (height > kMaxTextureSize)) {		width /= 2;		height /= 2;		transform = CGAffineTransformScale(transform, 0.5f, 0.5f);		imageSize.width *= 0.5f;		imageSize.height *= 0.5f;	}		switch(pixelFormat) {				case kTexture2DPixelFormat_RGBA8888:			colorSpace = CGColorSpaceCreateDeviceRGB();			data = malloc(height * width * 4);			context = CGBitmapContextCreate(data, width, height, 8, 4 * width, colorSpace, kCGImageAlphaPremultipliedLast | kCGBitmapByteOrder32Big);			CGColorSpaceRelease(colorSpace);			break;		case kTexture2DPixelFormat_RGB565:			colorSpace = CGColorSpaceCreateDeviceRGB();			data = malloc(height * width * 4);			context = CGBitmapContextCreate(data, width, height, 8, 4 * width, colorSpace, kCGImageAlphaNoneSkipLast | kCGBitmapByteOrder32Big);			CGColorSpaceRelease(colorSpace);			break;					case kTexture2DPixelFormat_A8:			data = malloc(height * width);			context = CGBitmapContextCreate(data, width, height, 8, width, NULL, kCGImageAlphaOnly);			break;						default:			[NSException raise:NSInternalInconsistencyException format:@"Invalid pixel format"];	} 	CGContextClearRect(context, CGRectMake(0, 0, width, height));	CGContextTranslateCTM(context, 0, height - imageSize.height);		if(!CGAffineTransformIsIdentity(transform))		CGContextConcatCTM(context, transform);	CGContextDrawImage(context, CGRectMake(0, 0, CGImageGetWidth(image), CGImageGetHeight(image)), image);	//Convert "RRRRRRRRRGGGGGGGGBBBBBBBBAAAAAAAA" to "RRRRRGGGGGGBBBBB"	if(pixelFormat == kTexture2DPixelFormat_RGB565) {		tempData = malloc(height * width * 2);		inPixel32 = (unsigned int*)data;		outPixel16 = (unsigned short*)tempData;		for(i = 0; i < width * height; ++i, ++inPixel32)			*outPixel16++ = ((((*inPixel32 >> 0) & 0xFF) >> 3) << 11) | ((((*inPixel32 >> 8) & 0xFF) >> 2) << 5) | ((((*inPixel32 >> 16) & 0xFF) >> 3) << 0);		free(data);		data = tempData;			}	self = [self initWithData:data pixelFormat:pixelFormat pixelsWide:width pixelsHigh:height contentSize:imageSize];		CGContextRelease(context);	free(data);		return self;}@end@implementation Texture2D (Text)- (id) initWithString:(NSString*)string fontName:(NSString*)name fontSize:(CGFloat)size{	CGSize dim = [string sizeWithFont: [UIFont fontWithName:name size:size]];	return [self initWithString:string dimensions:dim alignment:UITextAlignmentCenter fontName:name fontSize:size];}- (id) initWithString:(NSString*)string dimensions:(CGSize)dimensions alignment:(UITextAlignment)alignment fontName:(NSString*)name fontSize:(CGFloat)size{	NSUInteger				width,							height,							i;	CGContextRef			context;	void*					data;	CGColorSpaceRef			colorSpace;	UIFont *				font;		font = [UIFont fontWithName:name size:size];	width = dimensions.width;	if((width != 1) && (width & (width - 1))) {		i = 1;		while(i < width)		i *= 2;		width = i;	}	height = dimensions.height;	if((height != 1) && (height & (height - 1))) {		i = 1;		while(i < height)		i *= 2;		height = i;	}		colorSpace = CGColorSpaceCreateDeviceGray();	data = calloc(height, width);	context = CGBitmapContextCreate(data, width, height, 8, width, colorSpace, kCGImageAlphaNone);	CGColorSpaceRelease(colorSpace);			CGContextSetGrayFillColor(context, 1.0f, 1.0f);	CGContextTranslateCTM(context, 0.0f, height);	CGContextScaleCTM(context, 1.0f, -1.0f); //NOTE: NSString draws in UIKit referential i.e. renders upside-down compared to CGBitmapContext referential	UIGraphicsPushContext(context);		[string drawInRect:CGRectMake(0, 0, dimensions.width, dimensions.height) withFont:font lineBreakMode:UILineBreakModeWordWrap alignment:alignment];	UIGraphicsPopContext();		self = [self initWithData:data pixelFormat:kTexture2DPixelFormat_A8 pixelsWide:width pixelsHigh:height contentSize:dimensions];		CGContextRelease(context);	free(data);		return self;}@end@implementation Texture2D (Drawing)- (void) drawAtPoint:(CGPoint)point {	GLfloat		coordinates[] = { 0.0f,	_maxT,								_maxS,	_maxT,								0.0f,	0.0f,								_maxS,	0.0f };	GLfloat		width = (GLfloat)_width * _maxS,				height = (GLfloat)_height * _maxT;#if 0	GLfloat		vertices[] = {	-width / 2 + point.x,	-height / 2 + point.y,	0.0f,								width / 2 + point.x,	-height / 2 + point.y,	0.0f,								-width / 2 + point.x,	height / 2 + point.y,	0.0f,								width / 2 + point.x,	height / 2 + point.y,	0.0f };	#else // anchor is done by cocos2d automagically	GLfloat		vertices[] = {	point.x,			point.y,	0.0f,								width + point.x,	point.y,	0.0f,								point.x,			height  + point.y,	0.0f,								width + point.x,	height  + point.y,	0.0f };#endif		glBindTexture(GL_TEXTURE_2D, _name);	glVertexPointer(3, GL_FLOAT, 0, vertices);	glTexCoordPointer(2, GL_FLOAT, 0, coordinates);	glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);}- (void) drawInRect:(CGRect)rect{	GLfloat	 coordinates[] = {  0.0f,	_maxT,								_maxS,	_maxT,								0.0f,	0.0f,								_maxS,	0.0f  };	GLfloat	vertices[] = {	rect.origin.x,							rect.origin.y,							0.0f,							rect.origin.x + rect.size.width,		rect.origin.y,							0.0f,							rect.origin.x,							rect.origin.y + rect.size.height,		0.0f,							rect.origin.x + rect.size.width,		rect.origin.y + rect.size.height,		0.0f };		glBindTexture(GL_TEXTURE_2D, _name);	glVertexPointer(3, GL_FLOAT, 0, vertices);	glTexCoordPointer(2, GL_FLOAT, 0, coordinates);	glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);}@end@implementation Texture2D (PVRTC)-(id) initWithPVRTCData: (const void*)data level:(int)level bpp:(int)bpp hasAlpha:(BOOL)hasAlpha length:(int)length{	GLint					saveName;	if((self = [super init])) {		glGenTextures(1, &_name);		glGetIntegerv(GL_TEXTURE_BINDING_2D, &saveName);		glBindTexture(GL_TEXTURE_2D, _name);		[Texture2D applyTexParameters];				GLenum format;		GLsizei size = length * length * bpp / 8;		if(hasAlpha) {			format = (bpp == 4) ? GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG : GL_COMPRESSED_RGBA_PVRTC_2BPPV1_IMG;		} else {			format = (bpp == 4) ? GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG : GL_COMPRESSED_RGB_PVRTC_2BPPV1_IMG;		}		if(size < 32) {			size = 32;		}		glCompressedTexImage2D(GL_TEXTURE_2D, level, format, length, length, 0, size, data);				glBindTexture(GL_TEXTURE_2D, saveName);				_size = CGSizeMake(length, length);		_width = length;		_height = length;		_maxS = 1.0f;		_maxT = 1.0f;	}						return self;}-(id) initWithPVRTCFile: (NSString*) file{	if( (self = [super init]) ) {		PVRTexture *pvr = [[PVRTexture alloc] initWithContentsOfFile:file];		pvr.retainName = YES;	// don't dealloc texture on release				_name = pvr.name;	// texture id		_maxS = 1.0f;		_maxT = 1.0f;		_width = pvr.width;		// width		_height = pvr.height;	// height		_size = CGSizeMake(_width, _height);		[pvr release];	}	return self;}@end//// Used to apply MIN/MAG filter//@implementation Texture2D (GLFilter)+(void) setTexParameters: (ccTexParams*) texParams{	_texParams = *texParams;}+(ccTexParams) texParameters{	return _texParams;}+(void) applyTexParameters{	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, _texParams.minFilter );	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, _texParams.magFilter );	glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, _texParams.wrapS );	glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, _texParams.wrapT );}+(void) restoreTexParameters{	_texParams = _texParamsCopy;}+(void) saveTexParameters{	_texParamsCopy = _texParams;}+(void) setAliasTexParameters{	_texParams.magFilter = _texParams.minFilter = GL_NEAREST;}+(void) setAntiAliasTexParameters{	_texParams.magFilter = _texParams.minFilter = GL_LINEAR;}@end