axmol/testjs/libs/cocos2dx/textures/CCTexturePVR.cpp

/****************************************************************************
Copyright (c) 2011		Jirka Fajfr for cocos2d-x
Copyright (c) 2010-2011 cocos2d-x.org
Copyright (c) 2008      Apple Inc. All Rights Reserved.

http://www.cocos2d-x.org

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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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****************************************************************************/

#include "CCTexture2D.h"
#include "CCTexturePVR.h"
#include "ccMacros.h"
#include "CCData.h"
#include "CCConfiguration.h"
#include "support/ccUtils.h"
#include "CCStdC.h"
#include "CCFileUtils.h"
#include "support/zip_support/ZipUtils.h"

#include <cctype>

namespace   cocos2d {

#define PVR_TEXTURE_FLAG_TYPE_MASK	0xff
#define PVR_TEXTURE_FLAG_FLIPPED_MASK 0x10000

// Values taken from PVRTexture.h from http://www.imgtec.com
enum {
    kPVRTextureFlagMipmap		= (1<<8),		// has mip map levels
    kPVRTextureFlagTwiddle		= (1<<9),		// is twiddled
    kPVRTextureFlagBumpmap		= (1<<10),		// has normals encoded for a bump map
    kPVRTextureFlagTiling		= (1<<11),		// is bordered for tiled pvr
    kPVRTextureFlagCubemap		= (1<<12),		// is a cubemap/skybox
    kPVRTextureFlagFalseMipCol	= (1<<13),		// are there false coloured MIP levels
    kPVRTextureFlagVolume		= (1<<14),		// is this a volume texture
    kPVRTextureFlagAlpha		= (1<<15),		// v2.1 is there transparency info in the texture
    kPVRTextureFlagVerticalFlip	= (1<<16),		// v2.1 is the texture vertically flipped
};
    
/*
	PVR header contains special field called PVRTag. This tag
	is used only to determine that passed file is really pvrt.

	Its set of 4 numbers. Each number casted to the char 
	must correspond to the "PVR!" string
*/
static unsigned int gPVRTexIdentifier[] = { 'P', 'V', 'R', '!'};

/*
	List of formats in pvr container
*/
enum
{
	kPVRTextureFlagTypeRGBA_4444= 0x10,
	kPVRTextureFlagTypeRGBA_5551,
	kPVRTextureFlagTypeRGBA_8888,
	kPVRTextureFlagTypeRGB_565,
	kPVRTextureFlagTypeRGB_555,				// unsupported
	kPVRTextureFlagTypeRGB_888,				// unsupported
	kPVRTextureFlagTypeI_8,
	kPVRTextureFlagTypeAI_88,
	kPVRTextureFlagTypePVRTC_2,
	kPVRTextureFlagTypePVRTC_4,	
	kPVRTextureFlagTypeBGRA_8888,
	kPVRTextureFlagTypeA_8,
};

/*
	Helps us to convert pvr format to the gl compatible bitspaces

	WARNING!! OpenGL ES 1.1. does not support GL_BGRA format. Its PowerVR 
	extension and it will work only on PowerVR chipsets. It means that

	kPVRTextureFlagTypeBGRA_8888 can be used only on apple devices (or PowerVR compatible)
*/
static const unsigned int tableFormats[][7] = {
	
	// - PVR texture format
	// - OpenGL internal format
	// - OpenGL format
	// - OpenGL type
	// - bpp
	// - compressed
    // - Cocos2d texture format constant
	{ kPVRTextureFlagTypeRGBA_4444, GL_RGBA,	GL_RGBA, GL_UNSIGNED_SHORT_4_4_4_4,	16, false, kCCTexture2DPixelFormat_RGBA4444	},
	{ kPVRTextureFlagTypeRGBA_5551, GL_RGBA,	GL_RGBA, GL_UNSIGNED_SHORT_5_5_5_1,	16, false, kCCTexture2DPixelFormat_RGB5A1	},
	{ kPVRTextureFlagTypeRGBA_8888, GL_RGBA,	GL_RGBA, GL_UNSIGNED_BYTE,			32, false, kCCTexture2DPixelFormat_RGBA8888	},
	{ kPVRTextureFlagTypeRGB_565,	GL_RGB,		GL_RGB,	 GL_UNSIGNED_SHORT_5_6_5,	16, false, kCCTexture2DPixelFormat_RGB565	},
    { kPVRTextureFlagTypeA_8,		GL_ALPHA,	GL_ALPHA,	GL_UNSIGNED_BYTE,		8,	false, kCCTexture2DPixelFormat_A8	    },
	{ kPVRTextureFlagTypeI_8,		GL_LUMINANCE,	GL_LUMINANCE,	GL_UNSIGNED_BYTE,			8,	false, kCCTexture2DPixelFormat_I8	},
	{ kPVRTextureFlagTypeAI_88,		GL_LUMINANCE_ALPHA,	GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE,	16,	false, kCCTexture2DPixelFormat_AI88 },
#if (CC_TARGET_PLATFORM == CC_PLATFORM_IOS)
	{ kPVRTextureFlagTypePVRTC_2,	GL_COMPRESSED_RGBA_PVRTC_2BPPV1_IMG, -1, -1,	2,	true, kCCTexture2DPixelFormat_PVRTC2 },
	{ kPVRTextureFlagTypePVRTC_4,	GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG, -1, -1,	4,	true, kCCTexture2DPixelFormat_PVRTC4 },
	{ kPVRTextureFlagTypeBGRA_8888, GL_RGBA,	GL_BGRA, GL_UNSIGNED_BYTE,			32,	false, kCCTexture2DPixelFormat_RGBA8888	},
#endif
};

//Tells How large is tableFormats
#define MAX_TABLE_ELEMENTS (sizeof(tableFormats) / sizeof(tableFormats[0]))

/*
	Helper enum to traverse tableFormats
*/
enum {
	kCCInternalPVRTextureFormat,
	kCCInternalOpenGLInternalFormat,
	kCCInternalOpenGLFormat,
	kCCInternalOpenGLType,
	kCCInternalBPP,
	kCCInternalCompressedImage,
    kCCInternalCCTexture2DPixelFormat,
};

/*
	Official PVRT header
*/
typedef struct _PVRTexHeader
{
	unsigned int headerLength;
	unsigned int height;
	unsigned int width;
	unsigned int numMipmaps;
	unsigned int flags;
	unsigned int dataLength;
	unsigned int bpp;
	unsigned int bitmaskRed;
	unsigned int bitmaskGreen;
	unsigned int bitmaskBlue;
	unsigned int bitmaskAlpha;
	unsigned int pvrTag;
	unsigned int numSurfs;
} PVRTexHeader;

CCTexturePVR::CCTexturePVR() :
    m_uTableFormatIndex(0),
	m_uNumberOfMipmaps(0)
{
}

CCTexturePVR::~CCTexturePVR()
{
	CCLOGINFO( "cocos2d: deallocing CCTexturePVR" );

	if (m_uName != 0 && ! m_bRetainName )
		glDeleteTextures(1, &m_uName);
}

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

unsigned int CCTexturePVR::getWidth()
{
	return m_uWidth;
}

unsigned int CCTexturePVR::getHeight()
{
	return m_uHeight;
}

CCTexture2DPixelFormat CCTexturePVR::getFormat()
{
	return m_eFormat;
}

bool CCTexturePVR::getHasAlpha()
{
	return m_bHasAlpha;
}

bool CCTexturePVR::getRetainName()
{
	return m_bRetainName;
}

void CCTexturePVR::setRetainName(bool var)
{
	m_bRetainName = var;
}

bool CCTexturePVR::unpackPVRData(unsigned char* data, unsigned int len)
{
	bool success = false;
    PVRTexHeader *header = NULL;
    unsigned int flags, pvrTag;
	unsigned int dataLength = 0, dataOffset = 0, dataSize = 0;
	unsigned int blockSize = 0, widthBlocks = 0, heightBlocks = 0;
	unsigned int width = 0, height = 0, bpp = 4;
	unsigned char *bytes = NULL;
    unsigned int formatFlags;

	//Cast first sizeof(PVRTexHeader) bytes of data stream as PVRTexHeader
    header = (PVRTexHeader *)data;

	//Make sure that tag is in correct formatting
	pvrTag = CC_SWAP_INT32_LITTLE_TO_HOST(header->pvrTag);

	/*
		Check that given data really represents pvrtexture

		[0] = 'P'
		[1] = 'V'
		[2] = 'R'
		[3] = '!'
	*/
	if (gPVRTexIdentifier[0] != ((pvrTag >>  0) & 0xff) ||
		gPVRTexIdentifier[1] != ((pvrTag >>  8) & 0xff) ||
		gPVRTexIdentifier[2] != ((pvrTag >> 16) & 0xff) ||
		gPVRTexIdentifier[3] != ((pvrTag >> 24) & 0xff))
	{
		return false;
	}
    
    CCConfiguration *configuration = CCConfiguration::sharedConfiguration();

	//Get file flags (in correct byte order)
	flags = CC_SWAP_INT32_LITTLE_TO_HOST(header->flags);

	//Trim to only bites which are needed. Resulting flag is image format
	formatFlags = flags & PVR_TEXTURE_FLAG_TYPE_MASK;

	/*
     When flags combined with flipped mask is not empty (zero). 
     It means that image is compressed as flipped. We don't
     support automatic flipping.
     */
    bool flipped = (bool)(flags & kPVRTextureFlagVerticalFlip);
    if ( flipped )
    {
        CCLOG("cocos2d: WARNING: Image is flipped. Regenerate it using PVRTexTool");
    }

    if ( ! configuration->isSupportsNPOT() &&
        (header->width != ccNextPOT(header->width) || header->height != ccNextPOT(header->height)))
    {
        CCLOG("cocos2d: ERROR: Loding an NPOT texture (%dx%d) but is not supported on this device", header->width, header->height);
        return false;
    }
	
	//Check that sides of texture are power of two
	if(header->width != ccNextPOT(header->width) || header->height != ccNextPOT(header->height)) 
	{
		CCLOG("cocos2d: WARNING: PVR NPOT textures are not supported. Regenerate it.");
		return false;
	}

	//Go thru format array
	for (m_uTableFormatIndex = 0; m_uTableFormatIndex < (unsigned int)MAX_TABLE_ELEMENTS; m_uTableFormatIndex++)
	{
		//Does image format in table fits to the one parsed from header?
		if (tableFormats[m_uTableFormatIndex][kCCInternalPVRTextureFormat] == formatFlags)
		{
			//Reset num of mipmaps
			m_uNumberOfMipmaps = 0;

			//Get size of maimap
			m_uWidth = width = CC_SWAP_INT32_LITTLE_TO_HOST(header->width);
			m_uHeight = height = CC_SWAP_INT32_LITTLE_TO_HOST(header->height);
			
			//Do we use alpha ?
			if (CC_SWAP_INT32_LITTLE_TO_HOST(header->bitmaskAlpha))
				m_bHasAlpha = true;
			else
				m_bHasAlpha = false;
			
			//Get ptr to where data starts..
			dataLength = CC_SWAP_INT32_LITTLE_TO_HOST(header->dataLength);

			//Move by size of header
			bytes = ((unsigned char *)data) + sizeof(PVRTexHeader);
            m_eFormat = (CCTexture2DPixelFormat)( tableFormats[m_uTableFormatIndex][kCCInternalCCTexture2DPixelFormat] );
            bpp = tableFormats[m_uTableFormatIndex][kCCInternalBPP];
			
			// Calculate the data size for each texture level and respect the minimum number of blocks
			while (dataOffset < dataLength)
			{
				switch (formatFlags) {
					case kPVRTextureFlagTypePVRTC_2:
						blockSize = 8 * 4; // Pixel by pixel block size for 2bpp
						widthBlocks = width / 8;
						heightBlocks = height / 4;
						bpp = 2;
						break;
					case kPVRTextureFlagTypePVRTC_4:
						blockSize = 4 * 4; // Pixel by pixel block size for 4bpp
						widthBlocks = width / 4;
						heightBlocks = height / 4;
						bpp = 4;
						break;
					case kPVRTextureFlagTypeBGRA_8888:
						if (CCConfiguration::sharedConfiguration()->isSupportsBGRA8888() == false) 
						{
							CCLOG("cocos2d: TexturePVR. BGRA8888 not supported on this device");
							return false;
						}
					default:
						blockSize = 1;
						widthBlocks = width;
						heightBlocks = height;
						bpp = tableFormats[m_uTableFormatIndex][kCCInternalBPP];
						break;
				}
				
				// Clamp to minimum number of blocks
				if (widthBlocks < 2)
					widthBlocks = 2;
				if (heightBlocks < 2)
					heightBlocks = 2;

				dataSize = widthBlocks * heightBlocks * ((blockSize  * bpp) / 8);
				unsigned int packetLength = (dataLength-dataOffset);
				packetLength = packetLength > dataSize ? dataSize : packetLength;
				
				//Make record to the mipmaps array and increment coutner
				m_asMipmaps[m_uNumberOfMipmaps].address = bytes+dataOffset;
				m_asMipmaps[m_uNumberOfMipmaps].len = packetLength;
				m_uNumberOfMipmaps++;
				
				//Check that we didn't overflow
				CCAssert(m_uNumberOfMipmaps < CC_PVRMIPMAP_MAX, 
                         "TexturePVR: Maximum number of mimpaps reached. Increate the CC_PVRMIPMAP_MAX value");
				
				dataOffset += packetLength;
				
				//Update width and height to the next lower power of two 
				width = MAX(width >> 1, 1);
				height = MAX(height >> 1, 1);
			}
			
			//Mark pass as success
			success = true;
			break;
		}
	}

	if (false == success)
    {
		CCLOG("cocos2d: WARNING: Unssupported PVR Pixel Format: 0x%2x", formatFlags);
    }
	
	return success;
}

bool CCTexturePVR::createGLTexture()
{
	unsigned int width = m_uWidth;
	unsigned int height = m_uHeight;
	GLenum err;
	
	if (m_uNumberOfMipmaps > 0)
	{
		if (m_uName != 0)
        {
			glDeleteTextures(1, &m_uName);
        }
		
		glGenTextures(1, &m_uName);
		glBindTexture(GL_TEXTURE_2D, m_uName);
	}

	// Generate textures with mipmaps
	for (unsigned int i = 0; i < m_uNumberOfMipmaps; ++i)
	{
		GLenum internalFormat = tableFormats[m_uTableFormatIndex][kCCInternalOpenGLInternalFormat];
		GLenum format = tableFormats[m_uTableFormatIndex][kCCInternalOpenGLFormat];
		GLenum type = tableFormats[m_uTableFormatIndex][kCCInternalOpenGLType];
		bool compressed = tableFormats[m_uTableFormatIndex][kCCInternalCompressedImage] == 1;
		 
		if (compressed == true && CCConfiguration::sharedConfiguration()->isSupportsPVRTC() == false) 
		{
			CCLOG("cocos2d: WARNING: PVRTC images are not supported");
			return false;
		}			
		
		unsigned char *data = m_asMipmaps[i].address;
		unsigned int datalen = m_asMipmaps[i].len;
		
		if (compressed == true)
		{
			glCompressedTexImage2D(GL_TEXTURE_2D, i, internalFormat, width, height, 0, datalen, data);
		}
		else 
		{
			glTexImage2D(GL_TEXTURE_2D, i, internalFormat, width, height, 0, format, type, data);
		}

		if(i > 0 && (width != height || ccNextPOT(width) != width ) )
        {
			CCLOG("cocos2d: TexturePVR. WARNING. Mipmap level %lu is not squared. Texture won't render correctly. width=%lu != height=%lu", i, width, height);
        }
		
		err = glGetError();
		if (err != GL_NO_ERROR)
		{
			CCLOG("cocos2d: TexturePVR: Error uploading compressed texture level: %u . glError: 0x%04X", (unsigned int)i, err);
			return false;
		}
		
		//Update width and height to the next lower power of two
		width = MAX(width >> 1, 1);
		height = MAX(height >> 1, 1);
	}
		
	return true;
}


bool CCTexturePVR::initWithContentsOfFile(const char* path)
{
    unsigned char* pvrdata = NULL;
    int pvrlen = 0;
    
    std::string lowerCase(path);
    for (unsigned int i = 0; i < lowerCase.length(); ++i)
    {
        lowerCase[i] = tolower(lowerCase[i]);
    }
        
    if (lowerCase.find(".ccz") != std::string::npos)
    {
        pvrlen = ZipUtils::ccInflateCCZFile(path, &pvrdata);
    }
    else if (lowerCase.find(".gz") != std::string::npos)
    {
        pvrlen = ZipUtils::ccInflateGZipFile(path, &pvrdata);
    }
    else
    {
		pvrdata = CCFileUtils::getFileData(path, "rb", (unsigned long *)(&pvrlen));
    }
    
    if (pvrlen < 0)
    {
        this->release();
        return false;
    }
    
    m_uNumberOfMipmaps = 0;

	m_uName = 0;
	m_uWidth = m_uHeight = 0;
	m_bHasAlpha = false;

	m_bRetainName = false; // cocos2d integration

	if ( !unpackPVRData(pvrdata, pvrlen)  || !createGLTexture() )
	{
		delete [] pvrdata;
		this->release();
		return false;
	}

    delete [] pvrdata;
    
	return true;
}

CCTexturePVR * CCTexturePVR::pvrTextureWithContentsOfFile(const char* path)
{
	CCTexturePVR * pTexture = new CCTexturePVR();
	if(true == pTexture->initWithContentsOfFile(path))
    {
        pTexture->autorelease();
        return pTexture;
    }
    else
    {
        return NULL;
    }
}

}//namespace   cocos2d