axmol/cocos2dx/textures/CCTexture2D.cpp

/****************************************************************************
Copyright (c) 2010 cocos2d-x.org

http://www.cocos2d-x.org

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
****************************************************************************/



/*
* Support for RGBA_4_4_4_4 and RGBA_5_5_5_1 was copied from:
* https://devforums.apple.com/message/37855#37855 by a1studmuffin
*/

#include "CCTexture2D.h"
#include <GLES/glext.h>

#include "ccConfig.h"
#include "ccMacros.h"
#include "CCTexture2D.h"
#include "CCPVRTexture.h"
#include "CCConfiguration.h"
#include "platform/UIImage.h"


#if CC_FONT_LABEL_SUPPORT
// FontLabel support
/// @todo #include "FontManager.h"
/// @todo #include "FontLabelStringDrawing.h"
#endif// CC_FONT_LABEL_SUPPORT


static unsigned int nextPOT(unsigned int x)
{
	x = x - 1;
	x = x | (x >> 1);
	x = x | (x >> 2);
	x = x | (x >> 4);
	x = x | (x >> 8);
	x = x | (x >>16);
	return x + 1;
}

//CLASS IMPLEMENTATIONS:


// If the image has alpha, you can create RGBA8 (32-bit) or RGBA4 (16-bit) or RGB5A1 (16-bit)
// Default is: RGBA8888 (32-bit textures)
static CCTexture2DPixelFormat g_defaultAlphaPixelFormat = kCCTexture2DPixelFormat_Default;

CCTexture2D::CCTexture2D()
{

}

CCTexture2D::~CCTexture2D()
{
	CCLOGINFO("cocos2d: deallocing CCTexture2D %u.", m_uName);
	if(m_uName)
		glDeleteTextures(1, &m_uName);
}

CCTexture2DPixelFormat CCTexture2D::getPixelFormat()
{
	return m_ePixelFormat;
}

UINT32 CCTexture2D::getPixelsWide()
{
	return m_uPixelsWide;
}

UINT32 CCTexture2D::getPixelsHigh()
{
	return m_uPixelsHigh;
}

GLuint CCTexture2D::getName()
{
	return m_uName;
}

CGSize CCTexture2D::getContentSize()
{
	return m_tContentSize;
}

GLfloat CCTexture2D::getMaxS()
{
	return m_fMaxS;
}

void CCTexture2D::setMaxS(GLfloat maxS)
{
	m_fMaxS = maxS;
}

GLfloat CCTexture2D::getMaxT()
{
	return m_fMaxT;
}

void CCTexture2D::setMaxT(GLfloat maxT)
{
	m_fMaxT = maxT;
}

bool CCTexture2D::getHasPremultipliedAlpha()
{
	return m_bHasPremultipliedAlpha;
}

CCTexture2D * CCTexture2D::initWithData(const void *data, CCTexture2DPixelFormat pixelFormat, UINT32 pixelsWide, UINT32 pixelsHigh, CGSize contentSize)
{
	glGenTextures(1, &m_uName);
	glBindTexture(GL_TEXTURE_2D, m_uName);

	this->setAntiAliasTexParameters();

	// Specify OpenGL texture image

	switch(pixelFormat)
	{
	case kCCTexture2DPixelFormat_RGBA8888:
		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, pixelsWide, pixelsHigh, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
		break;
	case kCCTexture2DPixelFormat_RGBA4444:
		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, pixelsWide, pixelsHigh, 0, GL_RGBA, GL_UNSIGNED_SHORT_4_4_4_4, data);
		break;
	case kCCTexture2DPixelFormat_RGB5A1:
		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, pixelsWide, pixelsHigh, 0, GL_RGBA, GL_UNSIGNED_SHORT_5_5_5_1, data);
		break;
	case kCCTexture2DPixelFormat_RGB565:
		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, pixelsWide, pixelsHigh, 0, GL_RGB, GL_UNSIGNED_SHORT_5_6_5, data);
		break;
	case kCCTexture2DPixelFormat_A8:
		glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, pixelsWide, pixelsHigh, 0, GL_ALPHA, GL_UNSIGNED_BYTE, data);
		break;
	default:;
		NSAssert(0, "NSInternalInconsistencyException");

	}

	m_tContentSize = contentSize;
	m_uPixelsWide = pixelsWide;
	m_uPixelsHigh = pixelsHigh;
	m_ePixelFormat = pixelFormat;
	m_fMaxS = contentSize.width / static_cast<float>(pixelsWide);
	m_fMaxT = contentSize.height / static_cast<float>(pixelsHigh);

	m_bHasPremultipliedAlpha = false;

	return this;
}


std::string CCTexture2D::description(void)
{
	char des[100];
	sprintf_s(des, 100, "<CCTexture2D | Name = %u | Dimensions = %u x %u | Coordinates = (%.2f, %.2f)>", m_uName, m_uPixelsWide, m_uPixelsHigh, m_fMaxS, m_fMaxT);
	std::string ret(des);

	return ret;
}

// implementation CCTexture2D (Image)

CCTexture2D* CCTexture2D::initWithImage(UIImage * uiImage)
{
	UINT32 POTWide, POTHigh;

	if(uiImage == NULL)
	{
		CCLOG("cocos2d: CCTexture2D. Can't create Texture. UIImage is nil");
		this->release();
		return NULL;
	}

	CCConfiguration *conf = CCConfiguration::sharedConfiguration();

#if 1//CC_TEXTURE_NPOT_SUPPORT
	if( conf->isSupportsNPOT() ) 
	{
		POTWide = uiImage->width();
		POTHigh = uiImage->height();
	}
	else 
#endif
	{
		POTWide = nextPOT(uiImage->width());
		POTHigh = nextPOT(uiImage->height());
	}

	unsigned maxTextureSize = conf->getMaxTextureSize();
	if( POTHigh > maxTextureSize || POTWide > maxTextureSize ) 
	{
		CCLOG("cocos2d: WARNING: Image (%u x %u) is bigger than the supported %u x %u", POTWide, POTHigh, maxTextureSize, maxTextureSize);
		this->release();
		return NULL;
	}

	// always load premultiplied images
	this->initPremultipliedATextureWithImage(uiImage, POTWide, POTHigh);
	return this;
}

CCTexture2D * CCTexture2D::initPremultipliedATextureWithImage(UIImage *image, UINT32 pixelsWide, UINT32 pixelsHigh)
{
/** @todoN
SUInteger				i;
CGContextRef			context = nil;
void*					data = nil;;
CGColorSpaceRef			colorSpace;
void*					tempData;
unsigned int*			inPixel32;
unsigned short*			outPixel16;
BOOL					hasAlpha;
CGImageAlphaInfo		info;
CGSize					imageSize;
CCTexture2DPixelFormat	pixelFormat;

info = CGImageGetAlphaInfo(image);
hasAlpha = ((info == kCGImageAlphaPremultipliedLast) || (info == kCGImageAlphaPremultipliedFirst) || (info == kCGImageAlphaLast) || (info == kCGImageAlphaFirst) ? YES : NO);

size_t bpp = CGImageGetBitsPerComponent(image);
colorSpace = CGImageGetColorSpace(image);

if(colorSpace) {
if(hasAlpha || bpp >= 8)
pixelFormat = defaultAlphaPixelFormat;
else {
CCLOG(@"cocos2d: CCTexture2D: Using RGB565 texture since image has no alpha");
pixelFormat = kCCTexture2DPixelFormat_RGB565;
}
} else  {
// NOTE: No colorspace means a mask image
CCLOG(@"cocos2d: CCTexture2D: Using A8 texture since image is a mask");
pixelFormat = kCCTexture2DPixelFormat_A8;
}

imageSize = CGSizeMake(CGImageGetWidth(image), CGImageGetHeight(image));

// Create the bitmap graphics context

switch(pixelFormat) {          
case kCCTexture2DPixelFormat_RGBA8888:
case kCCTexture2DPixelFormat_RGBA4444:
case kCCTexture2DPixelFormat_RGB5A1:
colorSpace = CGColorSpaceCreateDeviceRGB();
data = malloc(POTHigh * POTWide * 4);
info = hasAlpha ? kCGImageAlphaPremultipliedLast : kCGImageAlphaNoneSkipLast; 
context = CGBitmapContextCreate(data, POTWide, POTHigh, 8, 4 * POTWide, colorSpace, info | kCGBitmapByteOrder32Big);				
CGColorSpaceRelease(colorSpace);
break;
case kCCTexture2DPixelFormat_RGB565:
colorSpace = CGColorSpaceCreateDeviceRGB();
data = malloc(POTHigh * POTWide * 4);
info = kCGImageAlphaNoneSkipLast;
context = CGBitmapContextCreate(data, POTWide, POTHigh, 8, 4 * POTWide, colorSpace, info | kCGBitmapByteOrder32Big);
CGColorSpaceRelease(colorSpace);
break;
case kCCTexture2DPixelFormat_A8:
data = malloc(POTHigh * POTWide);
info = kCGImageAlphaOnly; 
context = CGBitmapContextCreate(data, POTWide, POTHigh, 8, POTWide, NULL, info);
break;                    
default:
[NSException raise:NSInternalInconsistencyException format:@"Invalid pixel format"];
}


CGContextClearRect(context, CGRectMake(0, 0, POTWide, POTHigh));
CGContextTranslateCTM(context, 0, POTHigh - imageSize.height);
CGContextDrawImage(context, CGRectMake(0, 0, CGImageGetWidth(image), CGImageGetHeight(image)), image);

// Repack the pixel data into the right format

if(pixelFormat == kCCTexture2DPixelFormat_RGB565) {
//Convert "RRRRRRRRRGGGGGGGGBBBBBBBBAAAAAAAA" to "RRRRRGGGGGGBBBBB"
tempData = malloc(POTHigh * POTWide * 2);
inPixel32 = (unsigned int*)data;
outPixel16 = (unsigned short*)tempData;
for(i = 0; i < POTWide * POTHigh; ++i, ++inPixel32)
*outPixel16++ = ((((*inPixel32 >> 0) & 0xFF) >> 3) << 11) | ((((*inPixel32 >> 8) & 0xFF) >> 2) << 5) | ((((*inPixel32 >> 16) & 0xFF) >> 3) << 0);
free(data);
data = tempData;

}
else if (pixelFormat == kCCTexture2DPixelFormat_RGBA4444) {
//Convert "RRRRRRRRRGGGGGGGGBBBBBBBBAAAAAAAA" to "RRRRGGGGBBBBAAAA"
tempData = malloc(POTHigh * POTWide * 2);
inPixel32 = (unsigned int*)data;
outPixel16 = (unsigned short*)tempData;
for(i = 0; i < POTWide * POTHigh; ++i, ++inPixel32)
*outPixel16++ = 
((((*inPixel32 >> 0) & 0xFF) >> 4) << 12) | // R
((((*inPixel32 >> 8) & 0xFF) >> 4) << 8) | // G
((((*inPixel32 >> 16) & 0xFF) >> 4) << 4) | // B
((((*inPixel32 >> 24) & 0xFF) >> 4) << 0); // A


free(data);
data = tempData;

}
else if (pixelFormat == kCCTexture2DPixelFormat_RGB5A1) {
//Convert "RRRRRRRRRGGGGGGGGBBBBBBBBAAAAAAAA" to "RRRRRGGGGGBBBBBA"
tempData = malloc(POTHigh * POTWide * 2);
inPixel32 = (unsigned int*)data;
outPixel16 = (unsigned short*)tempData;
for(i = 0; i < POTWide * POTHigh; ++i, ++inPixel32)
*outPixel16++ = 
((((*inPixel32 >> 0) & 0xFF) >> 3) << 11) | // R
((((*inPixel32 >> 8) & 0xFF) >> 3) << 6) | // G
((((*inPixel32 >> 16) & 0xFF) >> 3) << 1) | // B
((((*inPixel32 >> 24) & 0xFF) >> 7) << 0); // A


free(data);
data = tempData;
}
self = [self initWithData:data pixelFormat:pixelFormat pixelsWide:POTWide pixelsHigh:POTHigh contentSize:imageSize];

// should be after calling super init
_hasPremultipliedAlpha = (info == kCGImageAlphaPremultipliedLast || info == kCGImageAlphaPremultipliedFirst);

CGContextRelease(context);
free(data);

return self;*/
return this;
}

// implementation CCTexture2D (Text)
CCTexture2D * CCTexture2D::initWithString(const std::string & str, const std::string & fontName, GLfloat fontSize)
{
	/** @todo about UIFont
	CGSize dim;

	#if CC_FONT_LABEL_SUPPORT
	ZFont *zFont = [[FontManager sharedManager] zFontWithName:name pointSize:size];
	if (zFont != nil)
	dim = [string sizeWithZFont:zFont];
	else
	#endif
	dim = [string sizeWithFont:[UIFont fontWithName:name size:size]];

	return [self initWithString:string dimensions:dim alignment:UITextAlignmentCenter fontName:name fontSize:size];*/
	return NULL;// tobe deleted
}
/** @todo UITextAlignment
- (id) initWithString:(string & )string dimensions:(CGSize)dimensions alignment:(UITextAlignment)alignment fontName:(string & )name fontSize:(CGFloat)size
	{
	NSUInteger				width,
	height,
	i;
	CGContextRef			context;
	void*					data;
	CGColorSpaceRef			colorSpace;
	id						uiFont;

	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);


	#if CC_FONT_LABEL_SUPPORT
	uiFont = [[FontManager sharedManager] zFontWithName:name pointSize:size];
	if (uiFont != nil)
	[string drawInRect:CGRectMake(0, 0, dimensions.width, dimensions.height) withZFont:uiFont lineBreakMode:UILineBreakModeWordWrap alignment:alignment];
	else
	#endif // CC_FONT_LABEL_SUPPORT
	{
	uiFont = [UIFont fontWithName:name size:size];
	[string drawInRect:CGRectMake(0, 0, dimensions.width, dimensions.height) withFont:uiFont lineBreakMode:UILineBreakModeWordWrap alignment:alignment];
	}
	if( ! uiFont )
	CCLOG(@"cocos2d: Texture2D: Font '%@' not found", name);
	UIGraphicsPopContext();

	self = [self initWithData:data pixelFormat:kCCTexture2DPixelFormat_A8 pixelsWide:width pixelsHigh:height contentSize:dimensions];

	CGContextRelease(context);
	free(data);
	
	return self;
}*/


// implementation CCTexture2D (Drawing)

void CCTexture2D::drawAtPoint(CGPoint point)
{
	GLfloat	coordinates[] = {	
		0.0f,	m_fMaxT,
		m_fMaxS,m_fMaxT,
		0.0f,	0.0f,
		m_fMaxS,0.0f };

	GLfloat	width = (GLfloat)m_uPixelsWide * m_fMaxS,
		height = (GLfloat)m_uPixelsHigh * m_fMaxT;

#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, m_uName);
	glVertexPointer(3, GL_FLOAT, 0, vertices);
	glTexCoordPointer(2, GL_FLOAT, 0, coordinates);
	glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
}

void CCTexture2D::drawInRect(CGRect rect)
{
	GLfloat	coordinates[] = {	
		0.0f,	m_fMaxT,
		m_fMaxS,m_fMaxT,
		0.0f,	0.0f,
		m_fMaxS,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, m_uName);
	glVertexPointer(2, GL_FLOAT, 0, vertices);
	glTexCoordPointer(2, GL_FLOAT, 0, coordinates);
	glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
}


// implementation CCTexture2D (PVRTC)

CCTexture2D * CCTexture2D::initWithPVRTCData(const void *data, int level, int bpp, bool hasAlpha, int length)
{
	if( !(CCConfiguration::sharedConfiguration()->isSupportsPVRTC()) )
	{
		CCLOG("cocos2d: WARNING: PVRTC images is not supported.");
		this->release();
		return NULL;
	}

	glGenTextures(1, &m_uName);
	glBindTexture(GL_TEXTURE_2D, m_uName);

	this->setAntiAliasTexParameters();

	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);

	m_tContentSize = CGSizeMake(static_cast<float>(length), static_cast<float>(length));
	m_uPixelsWide = length;
	m_uPixelsHigh = length;
	m_fMaxS = 1.0f;
	m_fMaxT = 1.0f;

	return this;
}

CCTexture2D * CCTexture2D::initWithPVRTCFile(const char* file)
{
	if (! CCConfiguration::sharedConfiguration()->isSupportsPVRTC())
	{
		CCLOG("cocos2d: WARNING: PVRTC images is not supported");
		this->release();
		return NULL;
	}

	CCPVRTexture *pvr = new CCPVRTexture();
	pvr = pvr->initWithContentsOfFile(file);
	if( pvr )
	{
		pvr->setRetainName(true);			// don't dealloc texture on release

		m_uName = pvr->getName();				// texture id
		m_fMaxS = 1.0f;
		m_fMaxT = 1.0f;
		m_uPixelsWide = pvr->getWidth();		// width
		m_uPixelsHigh = pvr->getHeight();		// height
		/// be careful : UINT32 to float
		m_tContentSize = CGSizeMake(static_cast<float>(m_uPixelsWide), static_cast<float>(m_uPixelsHigh));

		pvr->release();

		this->setAntiAliasTexParameters();
	}
	else 
	{
		CCLOG("cocos2d: Couldn't load PVR image");
		this->release();
		return NULL;
	}
	return this;
}

//
// Use to apply MIN/MAG filter
//
// implementation CCTexture2D (GLFilter)

void CCTexture2D::generateMipmap()
{
	NSAssert( m_uPixelsWide == nextPOT(m_uPixelsWide) && m_uPixelsHigh == nextPOT(m_uPixelsHigh), "Mimpap texture only works in POT textures");
	glBindTexture( GL_TEXTURE_2D, this->m_uName );
	/// @todo include what???	glGenerateMipmapOES(GL_TEXTURE_2D);
}

void CCTexture2D::setTexParameters(ccTexParams *texParams)
{
	NSAssert( (m_uPixelsWide == nextPOT(m_uPixelsWide) && m_uPixelsHigh == nextPOT(m_uPixelsHigh)) ||
		(texParams->wrapS == GL_CLAMP_TO_EDGE && texParams->wrapT == GL_CLAMP_TO_EDGE),
		"GL_CLAMP_TO_EDGE should be used in NPOT textures");
	glBindTexture( GL_TEXTURE_2D, this->m_uName );
	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 CCTexture2D::setAliasTexParameters()
{
	ccTexParams texParams = { GL_NEAREST, GL_NEAREST, GL_CLAMP_TO_EDGE, GL_CLAMP_TO_EDGE };
	this->setTexParameters(&texParams);
}

void CCTexture2D::setAntiAliasTexParameters()
{
	ccTexParams texParams = { GL_LINEAR, GL_LINEAR, GL_CLAMP_TO_EDGE, GL_CLAMP_TO_EDGE };
	this->setTexParameters(&texParams);
}

//
// Texture options for images that contains alpha
//
// implementation CCTexture2D (PixelFormat)

void CCTexture2D::setDefaultAlphaPixelFormat(CCTexture2DPixelFormat format)
{
	g_defaultAlphaPixelFormat = format;
}


CCTexture2DPixelFormat CCTexture2D::defaultAlphaPixelFormat()
{
	return g_defaultAlphaPixelFormat;
}