axmol/cocos/2d/CCTexture2D.cpp

/****************************************************************************
Copyright (c) 2008      Apple Inc. All Rights Reserved.
Copyright (c) 2010-2012 cocos2d-x.org
Copyright (c) 2013-2014 Chukong Technologies Inc.

http://www.cocos2d-x.org

Permission is hereby granted, free of charge, to any person obtaining a copy
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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/*
* 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 "CCGL.h"
#include "2d/CCTexture2D.h"
#include "2d/platform/CCImage.h"
#include "2d/ccUtils.h"
#include "2d/platform/CCDevice.h"
#include "base/ccConfig.h"
#include "base/ccMacros.h"
#include "base/CCConfiguration.h"
#include "base/CCPlatformMacros.h"
#include "base/CCDirector.h"
#include "renderer/CCGLProgram.h"
#include "renderer/ccGLStateCache.h"
#include "renderer/CCGLProgramCache.h"

#include "deprecated/CCString.h"


#if CC_ENABLE_CACHE_TEXTURE_DATA
    #include "2d/CCTextureCache.h"
#endif

NS_CC_BEGIN



namespace {
    typedef Texture2D::PixelFormatInfoMap::value_type PixelFormatInfoMapValue;
    static const PixelFormatInfoMapValue TexturePixelFormatInfoTablesValue[] =
    {
        PixelFormatInfoMapValue(Texture2D::PixelFormat::BGRA8888, Texture2D::PixelFormatInfo(GL_RGBA, GL_BGRA, GL_UNSIGNED_BYTE, 32, false, true)),
        PixelFormatInfoMapValue(Texture2D::PixelFormat::RGBA8888, Texture2D::PixelFormatInfo(GL_RGBA, GL_RGBA, GL_UNSIGNED_BYTE, 32, false, true)),
        PixelFormatInfoMapValue(Texture2D::PixelFormat::RGBA4444, Texture2D::PixelFormatInfo(GL_RGBA, GL_RGBA, GL_UNSIGNED_SHORT_4_4_4_4, 16, false, true)),
        PixelFormatInfoMapValue(Texture2D::PixelFormat::RGB5A1, Texture2D::PixelFormatInfo(GL_RGBA, GL_RGBA, GL_UNSIGNED_SHORT_5_5_5_1, 16, false, true)),
        PixelFormatInfoMapValue(Texture2D::PixelFormat::RGB565, Texture2D::PixelFormatInfo(GL_RGB, GL_RGB, GL_UNSIGNED_SHORT_5_6_5, 16, false, false)),
        PixelFormatInfoMapValue(Texture2D::PixelFormat::RGB888, Texture2D::PixelFormatInfo(GL_RGB, GL_RGB, GL_UNSIGNED_BYTE, 24, false, false)),
        PixelFormatInfoMapValue(Texture2D::PixelFormat::A8, Texture2D::PixelFormatInfo(GL_ALPHA, GL_ALPHA, GL_UNSIGNED_BYTE, 8, false, false)),
        PixelFormatInfoMapValue(Texture2D::PixelFormat::I8, Texture2D::PixelFormatInfo(GL_LUMINANCE, GL_LUMINANCE, GL_UNSIGNED_BYTE, 8, false, false)),
        PixelFormatInfoMapValue(Texture2D::PixelFormat::AI88, Texture2D::PixelFormatInfo(GL_LUMINANCE_ALPHA, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, 16, false, true)),
        
#ifdef GL_COMPRESSED_RGB_PVRTC_2BPPV1_IMG
        PixelFormatInfoMapValue(Texture2D::PixelFormat::PVRTC2, Texture2D::PixelFormatInfo(GL_COMPRESSED_RGB_PVRTC_2BPPV1_IMG, 0xFFFFFFFF, 0xFFFFFFFF, 2, true, false)),
        PixelFormatInfoMapValue(Texture2D::PixelFormat::PVRTC2A, Texture2D::PixelFormatInfo(GL_COMPRESSED_RGBA_PVRTC_2BPPV1_IMG, 0xFFFFFFFF, 0xFFFFFFFF, 2, true, true)),
        PixelFormatInfoMapValue(Texture2D::PixelFormat::PVRTC4, Texture2D::PixelFormatInfo(GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG, 0xFFFFFFFF, 0xFFFFFFFF, 4, true, false)),
        PixelFormatInfoMapValue(Texture2D::PixelFormat::PVRTC4A, Texture2D::PixelFormatInfo(GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG, 0xFFFFFFFF, 0xFFFFFFFF, 4, true, true)),
#endif
        
#ifdef GL_ETC1_RGB8_OES
        PixelFormatInfoMapValue(Texture2D::PixelFormat::ETC, Texture2D::PixelFormatInfo(GL_ETC1_RGB8_OES, 0xFFFFFFFF, 0xFFFFFFFF, 24, true, false)),
#endif
        
#ifdef GL_COMPRESSED_RGBA_S3TC_DXT1_EXT
        PixelFormatInfoMapValue(Texture2D::PixelFormat::S3TC_DXT1, Texture2D::PixelFormatInfo(GL_COMPRESSED_RGBA_S3TC_DXT1_EXT, 0xFFFFFFFF, 0xFFFFFFFF, 4, true, false)),
#endif
        
#ifdef GL_COMPRESSED_RGBA_S3TC_DXT3_EXT
        PixelFormatInfoMapValue(Texture2D::PixelFormat::S3TC_DXT3, Texture2D::PixelFormatInfo(GL_COMPRESSED_RGBA_S3TC_DXT3_EXT, 0xFFFFFFFF, 0xFFFFFFFF, 8, true, false)),
#endif
        
#ifdef GL_COMPRESSED_RGBA_S3TC_DXT5_EXT
        PixelFormatInfoMapValue(Texture2D::PixelFormat::S3TC_DXT5, Texture2D::PixelFormatInfo(GL_COMPRESSED_RGBA_S3TC_DXT5_EXT, 0xFFFFFFFF, 0xFFFFFFFF, 8, true, false)),
#endif
        
#ifdef GL_ATC_RGB_AMD
        PixelFormatInfoMapValue(Texture2D::PixelFormat::ATC_RGB, Texture2D::PixelFormatInfo(GL_ATC_RGB_AMD,
            0xFFFFFFFF, 0xFFFFFFFF, 4, true, false)),
#endif
        
#ifdef GL_ATC_RGBA_EXPLICIT_ALPHA_AMD
        PixelFormatInfoMapValue(Texture2D::PixelFormat::ATC_EXPLICIT_ALPHA, Texture2D::PixelFormatInfo(GL_ATC_RGBA_EXPLICIT_ALPHA_AMD,
            0xFFFFFFFF, 0xFFFFFFFF, 8, true, false)),
#endif
        
#ifdef GL_ATC_RGBA_INTERPOLATED_ALPHA_AMD
        PixelFormatInfoMapValue(Texture2D::PixelFormat::ATC_INTERPOLATED_ALPHA, Texture2D::PixelFormatInfo(GL_ATC_RGBA_INTERPOLATED_ALPHA_AMD,
            0xFFFFFFFF, 0xFFFFFFFF, 8, true, false)),
#endif
    };
}

//CLASS IMPLEMENTATIONS:

//The PixpelFormat corresponding information
const Texture2D::PixelFormatInfoMap Texture2D::_pixelFormatInfoTables(TexturePixelFormatInfoTablesValue,
                                                                     TexturePixelFormatInfoTablesValue + sizeof(TexturePixelFormatInfoTablesValue) / sizeof(TexturePixelFormatInfoTablesValue[0]));

// 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 Texture2D::PixelFormat g_defaultAlphaPixelFormat = Texture2D::PixelFormat::DEFAULT;

static bool _PVRHaveAlphaPremultiplied = false;

//////////////////////////////////////////////////////////////////////////
//conventer function

// IIIIIIII -> RRRRRRRRGGGGGGGGGBBBBBBBB
void Texture2D::convertI8ToRGB888(const unsigned char* data, ssize_t dataLen, unsigned char* outData)
{
    for (ssize_t i=0; i < dataLen; ++i)
    {
        *outData++ = data[i];     //R
        *outData++ = data[i];     //G
        *outData++ = data[i];     //B
    }
}

// IIIIIIIIAAAAAAAA -> RRRRRRRRGGGGGGGGBBBBBBBB
void Texture2D::convertAI88ToRGB888(const unsigned char* data, ssize_t dataLen, unsigned char* outData)
{
    for (ssize_t i = 0, l = dataLen - 1; i < l; i += 2)
    {
        *outData++ = data[i];     //R
        *outData++ = data[i];     //G
        *outData++ = data[i];     //B
    }
}

// IIIIIIII -> RRRRRRRRGGGGGGGGGBBBBBBBBAAAAAAAA
void Texture2D::convertI8ToRGBA8888(const unsigned char* data, ssize_t dataLen, unsigned char* outData)
{
    for (ssize_t i = 0; i < dataLen; ++i)
    {
        *outData++ = data[i];     //R
        *outData++ = data[i];     //G
        *outData++ = data[i];     //B
        *outData++ = 0xFF;        //A
    }
}

// IIIIIIIIAAAAAAAA -> RRRRRRRRGGGGGGGGBBBBBBBBAAAAAAAA
void Texture2D::convertAI88ToRGBA8888(const unsigned char* data, ssize_t dataLen, unsigned char* outData)
{
    for (ssize_t i = 0, l = dataLen - 1; i < l; i += 2)
    {
        *outData++ = data[i];     //R
        *outData++ = data[i];     //G
        *outData++ = data[i];     //B
        *outData++ = data[i + 1]; //A
    }
}

// IIIIIIII -> RRRRRGGGGGGBBBBB
void Texture2D::convertI8ToRGB565(const unsigned char* data, ssize_t dataLen, unsigned char* outData)
{
    unsigned short* out16 = (unsigned short*)outData;
    for (int i = 0; i < dataLen; ++i)
    {
        *out16++ = (data[i] & 0x00F8) << 8    //R
            | (data[i] & 0x00FC) << 3         //G
            | (data[i] & 0x00F8) >> 3;        //B
    }
}

// IIIIIIIIAAAAAAAA -> RRRRRGGGGGGBBBBB
void Texture2D::convertAI88ToRGB565(const unsigned char* data, ssize_t dataLen, unsigned char* outData)
{
    unsigned short* out16 = (unsigned short*)outData;
    for (ssize_t i = 0, l = dataLen - 1; i < l; i += 2)
    {
        *out16++ = (data[i] & 0x00F8) << 8    //R
            | (data[i] & 0x00FC) << 3         //G
            | (data[i] & 0x00F8) >> 3;        //B
    }
}

// IIIIIIII -> RRRRGGGGBBBBAAAA
void Texture2D::convertI8ToRGBA4444(const unsigned char* data, ssize_t dataLen, unsigned char* outData)
{
    unsigned short* out16 = (unsigned short*)outData;
    for (ssize_t i = 0; i < dataLen; ++i)
    {
        *out16++ = (data[i] & 0x00F0) << 8    //R
        | (data[i] & 0x00F0) << 4             //G
        | (data[i] & 0x00F0)                  //B
        | 0x000F;                             //A
    }
}

// IIIIIIIIAAAAAAAA -> RRRRGGGGBBBBAAAA
void Texture2D::convertAI88ToRGBA4444(const unsigned char* data, ssize_t dataLen, unsigned char* outData)
{
    unsigned short* out16 = (unsigned short*)outData;
    for (ssize_t i = 0, l = dataLen - 1; i < l; i += 2)
    {
        *out16++ = (data[i] & 0x00F0) << 8    //R
        | (data[i] & 0x00F0) << 4             //G
        | (data[i] & 0x00F0)                  //B
        | (data[i+1] & 0x00F0) >> 4;          //A
    }
}

// IIIIIIII -> RRRRRGGGGGBBBBBA
void Texture2D::convertI8ToRGB5A1(const unsigned char* data, ssize_t dataLen, unsigned char* outData)
{
    unsigned short* out16 = (unsigned short*)outData;
    for (int i = 0; i < dataLen; ++i)
    {
        *out16++ = (data[i] & 0x00F8) << 8    //R
            | (data[i] & 0x00F8) << 3         //G
            | (data[i] & 0x00F8) >> 2         //B
            | 0x0001;                         //A
    }
}

// IIIIIIIIAAAAAAAA -> RRRRRGGGGGBBBBBA
void Texture2D::convertAI88ToRGB5A1(const unsigned char* data, ssize_t dataLen, unsigned char* outData)
{
    unsigned short* out16 = (unsigned short*)outData;
    for (ssize_t i = 0, l = dataLen - 1; i < l; i += 2)
    {
        *out16++ = (data[i] & 0x00F8) << 8    //R
            | (data[i] & 0x00F8) << 3         //G
            | (data[i] & 0x00F8) >> 2         //B
            | (data[i + 1] & 0x0080) >> 7;    //A
    }
}

// IIIIIIII -> IIIIIIIIAAAAAAAA
void Texture2D::convertI8ToAI88(const unsigned char* data, ssize_t dataLen, unsigned char* outData)
{
    unsigned short* out16 = (unsigned short*)outData;
    for (ssize_t i = 0; i < dataLen; ++i)
    {
        *out16++ = 0xFF00     //A
        | data[i];            //I
    }
}

// IIIIIIIIAAAAAAAA -> AAAAAAAA
void Texture2D::convertAI88ToA8(const unsigned char* data, ssize_t dataLen, unsigned char* outData)
{
    for (ssize_t i = 1; i < dataLen; i += 2)
    {
        *outData++ = data[i]; //A
    }
}

// IIIIIIIIAAAAAAAA -> IIIIIIII
void Texture2D::convertAI88ToI8(const unsigned char* data, ssize_t dataLen, unsigned char* outData)
{
    for (ssize_t i = 0, l = dataLen - 1; i < l; i += 2)
    {
        *outData++ = data[i]; //R
    }
}

// RRRRRRRRGGGGGGGGBBBBBBBB -> RRRRRRRRGGGGGGGGBBBBBBBBAAAAAAAA
void Texture2D::convertRGB888ToRGBA8888(const unsigned char* data, ssize_t dataLen, unsigned char* outData)
{
    for (ssize_t i = 0, l = dataLen - 2; i < l; i += 3)
    {
        *outData++ = data[i];         //R
        *outData++ = data[i + 1];     //G
        *outData++ = data[i + 2];     //B
        *outData++ = 0xFF;            //A
    }
}

// RRRRRRRRGGGGGGGGBBBBBBBBAAAAAAAA -> RRRRRRRRGGGGGGGGBBBBBBBB
void Texture2D::convertRGBA8888ToRGB888(const unsigned char* data, ssize_t dataLen, unsigned char* outData)
{
    for (ssize_t i = 0, l = dataLen - 3; i < l; i += 4)
    {
        *outData++ = data[i];         //R
        *outData++ = data[i + 1];     //G
        *outData++ = data[i + 2];     //B
    }
}

// RRRRRRRRGGGGGGGGBBBBBBBB -> RRRRRGGGGGGBBBBB
void Texture2D::convertRGB888ToRGB565(const unsigned char* data, ssize_t dataLen, unsigned char* outData)
{
    unsigned short* out16 = (unsigned short*)outData;
    for (ssize_t i = 0, l = dataLen - 2; i < l; i += 3)
    {
        *out16++ = (data[i] & 0x00F8) << 8    //R
            | (data[i + 1] & 0x00FC) << 3     //G
            | (data[i + 2] & 0x00F8) >> 3;    //B
    }
}

// RRRRRRRRGGGGGGGGBBBBBBBBAAAAAAAA -> RRRRRGGGGGGBBBBB
void Texture2D::convertRGBA8888ToRGB565(const unsigned char* data, ssize_t dataLen, unsigned char* outData)
{
    unsigned short* out16 = (unsigned short*)outData;
    for (ssize_t i = 0, l = dataLen - 3; i < l; i += 4)
    {
        *out16++ = (data[i] & 0x00F8) << 8    //R
            | (data[i + 1] & 0x00FC) << 3     //G
            | (data[i + 2] & 0x00F8) >> 3;    //B
    }
}

// RRRRRRRRGGGGGGGGBBBBBBBB -> IIIIIIII
void Texture2D::convertRGB888ToI8(const unsigned char* data, ssize_t dataLen, unsigned char* outData)
{
    for (ssize_t i = 0, l = dataLen - 2; i < l; i += 3)
    {
        *outData++ = (data[i] * 299 + data[i + 1] * 587 + data[i + 2] * 114 + 500) / 1000;  //I =  (R*299 + G*587 + B*114 + 500) / 1000
    }
}

// RRRRRRRRGGGGGGGGBBBBBBBBAAAAAAAA -> IIIIIIII
void Texture2D::convertRGBA8888ToI8(const unsigned char* data, ssize_t dataLen, unsigned char* outData)
{
    for (ssize_t i = 0, l = dataLen - 3; i < l; i += 4)
    {
        *outData++ = (data[i] * 299 + data[i + 1] * 587 + data[i + 2] * 114 + 500) / 1000;  //I =  (R*299 + G*587 + B*114 + 500) / 1000
    }
}

// RRRRRRRRGGGGGGGGBBBBBBBBAAAAAAAA -> AAAAAAAA
void Texture2D::convertRGBA8888ToA8(const unsigned char* data, ssize_t dataLen, unsigned char* outData)
{
    for (ssize_t i = 0, l = dataLen -3; i < l; i += 4)
    {
        *outData++ = data[i + 3]; //A
    }
}

// RRRRRRRRGGGGGGGGBBBBBBBB -> IIIIIIIIAAAAAAAA
void Texture2D::convertRGB888ToAI88(const unsigned char* data, ssize_t dataLen, unsigned char* outData)
{
    for (ssize_t i = 0, l = dataLen - 2; i < l; i += 3)
    {
        *outData++ = (data[i] * 299 + data[i + 1] * 587 + data[i + 2] * 114 + 500) / 1000;  //I =  (R*299 + G*587 + B*114 + 500) / 1000
        *outData++ = 0xFF;
    }
}


// RRRRRRRRGGGGGGGGBBBBBBBBAAAAAAAA -> IIIIIIIIAAAAAAAA
void Texture2D::convertRGBA8888ToAI88(const unsigned char* data, ssize_t dataLen, unsigned char* outData)
{
    for (ssize_t i = 0, l = dataLen - 3; i < l; i += 4)
    {
        *outData++ = (data[i] * 299 + data[i + 1] * 587 + data[i + 2] * 114 + 500) / 1000;  //I =  (R*299 + G*587 + B*114 + 500) / 1000
        *outData++ = data[i + 3];
    }
}

// RRRRRRRRGGGGGGGGBBBBBBBB -> RRRRGGGGBBBBAAAA
void Texture2D::convertRGB888ToRGBA4444(const unsigned char* data, ssize_t dataLen, unsigned char* outData)
{
    unsigned short* out16 = (unsigned short*)outData;
    for (ssize_t i = 0, l = dataLen - 2; i < l; i += 3)
    {
        *out16++ = ((data[i] & 0x00F0) << 8           //R
                    | (data[i + 1] & 0x00F0) << 4     //G
                    | (data[i + 2] & 0xF0)            //B
                    |  0x0F);                         //A
    }
}

// RRRRRRRRGGGGGGGGBBBBBBBBAAAAAAAA -> RRRRGGGGBBBBAAAA
void Texture2D::convertRGBA8888ToRGBA4444(const unsigned char* data, ssize_t dataLen, unsigned char* outData)
{
    unsigned short* out16 = (unsigned short*)outData;
    for (ssize_t i = 0, l = dataLen - 3; i < l; i += 4)
    {
        *out16++ = (data[i] & 0x00F0) << 8    //R
        | (data[i + 1] & 0x00F0) << 4         //G
        | (data[i + 2] & 0xF0)                //B
        |  (data[i + 3] & 0xF0) >> 4;         //A
    }
}

// RRRRRRRRGGGGGGGGBBBBBBBB -> RRRRRGGGGGBBBBBA
void Texture2D::convertRGB888ToRGB5A1(const unsigned char* data, ssize_t dataLen, unsigned char* outData)
{
    unsigned short* out16 = (unsigned short*)outData;
    for (ssize_t i = 0, l = dataLen - 2; i < l; i += 3)
    {
        *out16++ = (data[i] & 0x00F8) << 8    //R
            | (data[i + 1] & 0x00F8) << 3     //G
            | (data[i + 2] & 0x00F8) >> 2     //B
            |  0x01;                          //A
    }
}

// RRRRRRRRGGGGGGGGBBBBBBBB -> RRRRRGGGGGBBBBBA
void Texture2D::convertRGBA8888ToRGB5A1(const unsigned char* data, ssize_t dataLen, unsigned char* outData)
{
    unsigned short* out16 = (unsigned short*)outData;
    for (ssize_t i = 0, l = dataLen - 2; i < l; i += 4)
    {
        *out16++ = (data[i] & 0x00F8) << 8    //R
            | (data[i + 1] & 0x00F8) << 3     //G
            | (data[i + 2] & 0x00F8) >> 2     //B
            |  (data[i + 3] & 0x0080) >> 7;   //A
    }
}
// conventer function end
//////////////////////////////////////////////////////////////////////////

Texture2D::Texture2D()
: _pixelFormat(Texture2D::PixelFormat::DEFAULT)
, _pixelsWide(0)
, _pixelsHigh(0)
, _name(0)
, _maxS(0.0)
, _maxT(0.0)
, _hasPremultipliedAlpha(false)
, _hasMipmaps(false)
, _shaderProgram(nullptr)
, _antialiasEnabled(true)
{
}

Texture2D::~Texture2D()
{
#if CC_ENABLE_CACHE_TEXTURE_DATA
    VolatileTextureMgr::removeTexture(this);
#endif

    CCLOGINFO("deallocing Texture2D: %p - id=%u", this, _name);
    CC_SAFE_RELEASE(_shaderProgram);

    if(_name)
    {
        GL::deleteTexture(_name);
    }
}

Texture2D::PixelFormat Texture2D::getPixelFormat() const
{
    return _pixelFormat;
}

int Texture2D::getPixelsWide() const
{
    return _pixelsWide;
}

int Texture2D::getPixelsHigh() const
{
    return _pixelsHigh;
}

GLuint Texture2D::getName() const
{
    return _name;
}

Size Texture2D::getContentSize() const
{
    Size ret;
    ret.width = _contentSize.width / CC_CONTENT_SCALE_FACTOR();
    ret.height = _contentSize.height / CC_CONTENT_SCALE_FACTOR();
    
    return ret;
}

const Size& Texture2D::getContentSizeInPixels()
{
    return _contentSize;
}

GLfloat Texture2D::getMaxS() const
{
    return _maxS;
}

void Texture2D::setMaxS(GLfloat maxS)
{
    _maxS = maxS;
}

GLfloat Texture2D::getMaxT() const
{
    return _maxT;
}

void Texture2D::setMaxT(GLfloat maxT)
{
    _maxT = maxT;
}

GLProgram* Texture2D::getGLProgram() const
{
    return _shaderProgram;
}

void Texture2D::setGLProgram(GLProgram* shaderProgram)
{
    CC_SAFE_RETAIN(shaderProgram);
    CC_SAFE_RELEASE(_shaderProgram);
    _shaderProgram = shaderProgram;
}

void Texture2D::releaseData(void *data)
{
    free(data);
}

void* Texture2D::keepData(void *data, unsigned int length)
{
    CC_UNUSED_PARAM(length);
    //The texture data mustn't be saved because it isn't a mutable texture.
    return data;
}

bool Texture2D::hasPremultipliedAlpha() const
{
    return _hasPremultipliedAlpha;
}

bool Texture2D::initWithData(const void *data, ssize_t dataLen, Texture2D::PixelFormat pixelFormat, int pixelsWide, int pixelsHigh, const Size& contentSize)
{
    CCASSERT(dataLen>0 && pixelsWide>0 && pixelsHigh>0, "Invalid size");

    //if data has no mipmaps, we will consider it has only one mipmap
    MipmapInfo mipmap;
    mipmap.address = (unsigned char*)data;
    mipmap.len = static_cast<int>(dataLen);
    return initWithMipmaps(&mipmap, 1, pixelFormat, pixelsWide, pixelsHigh);

    //update information
    _contentSize = contentSize;
    _maxS = contentSize.width / (float)(pixelsWide);
    _maxT = contentSize.height / (float)(pixelsHigh);
}

bool Texture2D::initWithMipmaps(MipmapInfo* mipmaps, int mipmapsNum, PixelFormat pixelFormat, int pixelsWide, int pixelsHigh)
{
    // cocos2d-x is currently calling this multiple times on the same Texture2D
    // if the GL texture has already been created,it will be leaked in OpenGL
    // For now, call deleteTexture if the texture already exists
    if(_name)
    {
        GL::deleteTexture(_name);
      _name = 0;
    }

    //the pixelFormat must be a certain value 
    CCASSERT(pixelFormat != PixelFormat::NONE && pixelFormat != PixelFormat::AUTO, "the \"pixelFormat\" param must be a certain value!");
    CCASSERT(pixelsWide>0 && pixelsHigh>0, "Invalid size");

    if (mipmapsNum <= 0)
    {
        CCLOG("cocos2d: WARNING: mipmap number is less than 1");
        return false;
    }
    

    if(_pixelFormatInfoTables.find(pixelFormat) == _pixelFormatInfoTables.end())
    {
        CCLOG("cocos2d: WARNING: unsupported pixelformat: %lx", (unsigned long)pixelFormat );
        return false;
    }

    const PixelFormatInfo& info = _pixelFormatInfoTables.at(pixelFormat);

    if (info.compressed && !Configuration::getInstance()->supportsPVRTC()
                        && !Configuration::getInstance()->supportsETC()
                        && !Configuration::getInstance()->supportsS3TC()
                        && !Configuration::getInstance()->supportsATITC())
    {
        CCLOG("cocos2d: WARNING: PVRTC/ETC images are not supported");
        return false;
    }

    //Set the row align only when mipmapsNum == 1 and the data is uncompressed
    if (mipmapsNum == 1 && !info.compressed)
    {
        unsigned int bytesPerRow = pixelsWide * info.bpp / 8;

        if(bytesPerRow % 8 == 0)
        {
            glPixelStorei(GL_UNPACK_ALIGNMENT, 8);
        }
        else if(bytesPerRow % 4 == 0)
        {
            glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
        }
        else if(bytesPerRow % 2 == 0)
        {
            glPixelStorei(GL_UNPACK_ALIGNMENT, 2);
        }
        else
        {
            glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
        }
    }else
    {
        glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
    }
    


    glGenTextures(1, &_name);
    GL::bindTexture2D(_name);

    if (mipmapsNum == 1)
    {
        glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, _antialiasEnabled ? GL_LINEAR : GL_NEAREST);
    }else
    {
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, _antialiasEnabled ? GL_LINEAR_MIPMAP_NEAREST : GL_NEAREST_MIPMAP_NEAREST);
    }
    
    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, _antialiasEnabled ? GL_LINEAR : GL_NEAREST );
    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );

#if CC_ENABLE_CACHE_TEXTURE_DATA
    if (_antialiasEnabled)
    {
        TexParams texParams = {(GLuint)(_hasMipmaps?GL_LINEAR_MIPMAP_NEAREST:GL_LINEAR),GL_LINEAR,GL_NONE,GL_NONE};
        VolatileTextureMgr::setTexParameters(this, texParams);
    } 
    else
    {
        TexParams texParams = {(GLuint)(_hasMipmaps?GL_NEAREST_MIPMAP_NEAREST:GL_NEAREST),GL_NEAREST,GL_NONE,GL_NONE};
        VolatileTextureMgr::setTexParameters(this, texParams);
    }
#endif

    CHECK_GL_ERROR_DEBUG(); // clean possible GL error
    
    // Specify OpenGL texture image
    int width = pixelsWide;
    int height = pixelsHigh;
    
    for (int i = 0; i < mipmapsNum; ++i)
    {
        unsigned char *data = mipmaps[i].address;
        GLsizei datalen = mipmaps[i].len;

        if (info.compressed)
        {
            glCompressedTexImage2D(GL_TEXTURE_2D, i, info.internalFormat, (GLsizei)width, (GLsizei)height, 0, datalen, data);
        }
        else
        {
            glTexImage2D(GL_TEXTURE_2D, i, info.internalFormat, (GLsizei)width, (GLsizei)height, 0, info.format, info.type, data);
        }

        if (i > 0 && (width != height || ccNextPOT(width) != width ))
        {
            CCLOG("cocos2d: Texture2D. WARNING. Mipmap level %u is not squared. Texture won't render correctly. width=%d != height=%d", i, width, height);
        }

        GLenum err = glGetError();
        if (err != GL_NO_ERROR)
        {
            CCLOG("cocos2d: Texture2D: Error uploading compressed texture level: %u . glError: 0x%04X", i, err);
            return false;
        }

        width = MAX(width >> 1, 1);
        height = MAX(height >> 1, 1);
    }

    _contentSize = Size((float)pixelsWide, (float)pixelsHigh);
    _pixelsWide = pixelsWide;
    _pixelsHigh = pixelsHigh;
    _pixelFormat = pixelFormat;
    _maxS = 1;
    _maxT = 1;

    _hasPremultipliedAlpha = false;
    _hasMipmaps = mipmapsNum > 1;

    // shader
    setGLProgram(GLProgramCache::getInstance()->getGLProgram(GLProgram::SHADER_NAME_POSITION_TEXTURE));
    return true;
}

bool Texture2D::updateWithData(const void *data,int offsetX,int offsetY,int width,int height)
{
    if (_name)
    {
        GL::bindTexture2D(_name);
        const PixelFormatInfo& info = _pixelFormatInfoTables.at(_pixelFormat);
        glTexSubImage2D(GL_TEXTURE_2D,0,offsetX,offsetY,width,height,info.format, info.type,data);

        return true;
    }
    return false;
}

std::string Texture2D::getDescription() const
{
    return StringUtils::format("<Texture2D | Name = %u | Dimensions = %ld x %ld | Coordinates = (%.2f, %.2f)>", _name, (long)_pixelsWide, (long)_pixelsHigh, _maxS, _maxT);
}

// implementation Texture2D (Image)
bool Texture2D::initWithImage(Image *image)
{
    return initWithImage(image, PixelFormat::NONE);
}

bool Texture2D::initWithImage(Image *image, PixelFormat format)
{
    if (image == nullptr)
    {
        CCLOG("cocos2d: Texture2D. Can't create Texture. UIImage is nil");
        return false;
    }

    int imageWidth = image->getWidth();
    int imageHeight = image->getHeight();

    Configuration *conf = Configuration::getInstance();

    int maxTextureSize = conf->getMaxTextureSize();
    if (imageWidth > maxTextureSize || imageHeight > maxTextureSize) 
    {
        CCLOG("cocos2d: WARNING: Image (%u x %u) is bigger than the supported %u x %u", imageWidth, imageHeight, maxTextureSize, maxTextureSize);
        return false;
    }

    unsigned char*   tempData = image->getData();
    Size             imageSize = Size((float)imageWidth, (float)imageHeight);
    PixelFormat      pixelFormat = PixelFormat::NONE;
    PixelFormat      renderFormat = image->getRenderFormat();
    size_t	         tempDataLen = image->getDataLen();


    if (image->getNumberOfMipmaps() > 1)
    {
        if (format != PixelFormat::NONE)
        {
            CCLOG("cocos2d: WARNING: This image has more than 1 mipmaps and we will not convert the data format");
        }

        initWithMipmaps(image->getMipmaps(), image->getNumberOfMipmaps(), image->getRenderFormat(), imageWidth, imageHeight);
        
        return true;
    }
    else if (image->isCompressed())
    {
        if (format != PixelFormat::NONE)
        {
            CCLOG("cocos2d: WARNING: This image is compressed and we cann't convert it for now");
        }

        initWithData(tempData, tempDataLen, image->getRenderFormat(), imageWidth, imageHeight, imageSize);
        return true;
    }
    else
    {
        // compute pixel format
        if (format != PixelFormat::NONE)
        {
            pixelFormat = format;
        }else
        {
            pixelFormat = g_defaultAlphaPixelFormat;
        }

        unsigned char* outTempData = nullptr;
        ssize_t outTempDataLen = 0;

        pixelFormat = convertDataToFormat(tempData, tempDataLen, renderFormat, pixelFormat, &outTempData, &outTempDataLen);

        initWithData(outTempData, outTempDataLen, pixelFormat, imageWidth, imageHeight, imageSize);


        if (outTempData != nullptr && outTempData != tempData)
        {

            free(outTempData);
        }

        // set the premultiplied tag
        if (!image->hasPremultipliedAlpha())
        {
            if (image->getFileType() == Image::Format::PVR)
            {
                _hasPremultipliedAlpha = _PVRHaveAlphaPremultiplied;
            }else
            {
                CCLOG("wanning: We cann't find the data is premultiplied or not, we will assume it's false.");
                _hasPremultipliedAlpha = false;
            }
        }else
        {
            _hasPremultipliedAlpha = image->isPremultipliedAlpha();
        }
        return true;
    }
}

Texture2D::PixelFormat Texture2D::convertI8ToFormat(const unsigned char* data, ssize_t dataLen, PixelFormat format, unsigned char** outData, ssize_t* outDataLen)
{
    switch (format)
    {
    case PixelFormat::RGBA8888:
        *outDataLen = dataLen*4;
        *outData = (unsigned char*)malloc(sizeof(unsigned char) * (*outDataLen));
        convertI8ToRGBA8888(data, dataLen, *outData);
        break;
    case PixelFormat::RGB888:
        *outDataLen = dataLen*3;
        *outData = (unsigned char*)malloc(sizeof(unsigned char) * (*outDataLen));
        convertI8ToRGB888(data, dataLen, *outData);
        break;
    case PixelFormat::RGB565:
        *outDataLen = dataLen*2;
        *outData = (unsigned char*)malloc(sizeof(unsigned char) * (*outDataLen));
        convertI8ToRGB565(data, dataLen, *outData);
        break;
    case PixelFormat::AI88:
        *outDataLen = dataLen*2;
        *outData = (unsigned char*)malloc(sizeof(unsigned char) * (*outDataLen));
        convertI8ToAI88(data, dataLen, *outData);
        break;
    case PixelFormat::RGBA4444:
        *outDataLen = dataLen*2;
        *outData = (unsigned char*)malloc(sizeof(unsigned char) * (*outDataLen));
        convertI8ToRGBA4444(data, dataLen, *outData);
        break;
    case PixelFormat::RGB5A1:
        *outDataLen = dataLen*2;
        *outData = (unsigned char*)malloc(sizeof(unsigned char) * (*outDataLen));
        convertI8ToRGB5A1(data, dataLen, *outData);
        break;
    default:
        // unsupport convertion or don't need to convert
        if (format != PixelFormat::AUTO && format != PixelFormat::I8)
        {
            CCLOG("Can not convert image format PixelFormat::I8 to format ID:%d, we will use it's origin format PixelFormat::I8", format);
        }

        *outData = (unsigned char*)data;
        *outDataLen = dataLen;
        return PixelFormat::I8;
    }

    return format;
}

Texture2D::PixelFormat Texture2D::convertAI88ToFormat(const unsigned char* data, ssize_t dataLen, PixelFormat format, unsigned char** outData, ssize_t* outDataLen)
{
    switch (format)
    {
    case PixelFormat::RGBA8888:
        *outDataLen = dataLen*2;
        *outData = (unsigned char*)malloc(sizeof(unsigned char) * (*outDataLen));
        convertAI88ToRGBA8888(data, dataLen, *outData);
        break;
    case PixelFormat::RGB888:
        *outDataLen = dataLen/2*3;
        *outData = (unsigned char*)malloc(sizeof(unsigned char) * (*outDataLen));
        convertAI88ToRGB888(data, dataLen, *outData);
        break;
    case PixelFormat::RGB565:
        *outDataLen = dataLen;
        *outData = (unsigned char*)malloc(sizeof(unsigned char) * (*outDataLen));
        convertAI88ToRGB565(data, dataLen, *outData);
        break;
    case PixelFormat::A8:
        *outDataLen = dataLen/2;
        *outData = (unsigned char*)malloc(sizeof(unsigned char) * (*outDataLen));
        convertAI88ToA8(data, dataLen, *outData);
        break;
    case PixelFormat::I8:
        *outDataLen = dataLen/2;
        *outData = (unsigned char*)malloc(sizeof(unsigned char) * (*outDataLen));
        convertAI88ToI8(data, dataLen, *outData);
        break;
    case PixelFormat::RGBA4444:
        *outDataLen = dataLen;
        *outData = (unsigned char*)malloc(sizeof(unsigned char) * (*outDataLen));
        convertAI88ToRGBA4444(data, dataLen, *outData);
        break;
    case PixelFormat::RGB5A1:
        *outDataLen = dataLen;
        *outData = (unsigned char*)malloc(sizeof(unsigned char) * (*outDataLen));
        convertAI88ToRGB5A1(data, dataLen, *outData);
        break;
    default:
        // unsupport convertion or don't need to convert
        if (format != PixelFormat::AUTO && format != PixelFormat::AI88)
        {
            CCLOG("Can not convert image format PixelFormat::AI88 to format ID:%d, we will use it's origin format PixelFormat::AI88", format);
        }

        *outData = (unsigned char*)data;
        *outDataLen = dataLen;
        return PixelFormat::AI88;
        break;
    }

    return format;
}

Texture2D::PixelFormat Texture2D::convertRGB888ToFormat(const unsigned char* data, ssize_t dataLen, PixelFormat format, unsigned char** outData, ssize_t* outDataLen)
{
    switch (format)
    {
    case PixelFormat::RGBA8888:
        *outDataLen = dataLen/3*4;
        *outData = (unsigned char*)malloc(sizeof(unsigned char) * (*outDataLen));
        convertRGB888ToRGBA8888(data, dataLen, *outData);
        break;
    case PixelFormat::RGB565:
        *outDataLen = dataLen/3*2;
        *outData = (unsigned char*)malloc(sizeof(unsigned char) * (*outDataLen));
        convertRGB888ToRGB565(data, dataLen, *outData);
        break;
    case PixelFormat::I8:
        *outDataLen = dataLen/3;
        *outData = (unsigned char*)malloc(sizeof(unsigned char) * (*outDataLen));
        convertRGB888ToI8(data, dataLen, *outData);
        break;
    case PixelFormat::AI88:
        *outDataLen = dataLen/3*2;
        *outData = (unsigned char*)malloc(sizeof(unsigned char) * (*outDataLen));
        convertRGB888ToAI88(data, dataLen, *outData);
        break;
    case PixelFormat::RGBA4444:
        *outDataLen = dataLen/3*2;
        *outData = (unsigned char*)malloc(sizeof(unsigned char) * (*outDataLen));
        convertRGB888ToRGBA4444(data, dataLen, *outData);
        break;
    case PixelFormat::RGB5A1:
        *outDataLen = dataLen;
        *outData = (unsigned char*)malloc(sizeof(unsigned char) * (*outDataLen));
        convertRGB888ToRGB5A1(data, dataLen, *outData);
        break;
    default:
        // unsupport convertion or don't need to convert
        if (format != PixelFormat::AUTO && format != PixelFormat::RGB888)
        {
            CCLOG("Can not convert image format PixelFormat::RGB888 to format ID:%d, we will use it's origin format PixelFormat::RGB888", format);
        }

        *outData = (unsigned char*)data;
        *outDataLen = dataLen;
        return PixelFormat::RGB888;
    }
    return format;
}

Texture2D::PixelFormat Texture2D::convertRGBA8888ToFormat(const unsigned char* data, ssize_t dataLen, PixelFormat format, unsigned char** outData, ssize_t* outDataLen)
{

    switch (format)
    {
    case PixelFormat::RGB888:
        *outDataLen = dataLen/4*3;
        *outData = (unsigned char*)malloc(sizeof(unsigned char) * (*outDataLen));
        convertRGBA8888ToRGB888(data, dataLen, *outData);
        break;
    case PixelFormat::RGB565:
        *outDataLen = dataLen/2;
        *outData = (unsigned char*)malloc(sizeof(unsigned char) * (*outDataLen));
        convertRGBA8888ToRGB565(data, dataLen, *outData);
        break;
    case PixelFormat::A8:
        *outDataLen = dataLen/4;
        *outData = (unsigned char*)malloc(sizeof(unsigned char) * (*outDataLen));
        convertRGBA8888ToA8(data, dataLen, *outData);
        break;
    case PixelFormat::I8:
        *outDataLen = dataLen/4;
        *outData = (unsigned char*)malloc(sizeof(unsigned char) * (*outDataLen));
        convertRGBA8888ToI8(data, dataLen, *outData);
        break;
    case PixelFormat::AI88:
        *outDataLen = dataLen/2;
        *outData = (unsigned char*)malloc(sizeof(unsigned char) * (*outDataLen));
        convertRGBA8888ToAI88(data, dataLen, *outData);
        break;
    case PixelFormat::RGBA4444:
        *outDataLen = dataLen/2;
        *outData = (unsigned char*)malloc(sizeof(unsigned char) * (*outDataLen));
        convertRGBA8888ToRGBA4444(data, dataLen, *outData);
        break;
    case PixelFormat::RGB5A1:
        *outDataLen = dataLen/2;
        *outData = (unsigned char*)malloc(sizeof(unsigned char) * (*outDataLen));
        convertRGBA8888ToRGB5A1(data, dataLen, *outData);
        break;
    default:
        // unsupport convertion or don't need to convert
        if (format != PixelFormat::AUTO && format != PixelFormat::RGBA8888)
        {
            CCLOG("Can not convert image format PixelFormat::RGBA8888 to format ID:%d, we will use it's origin format PixelFormat::RGBA8888", format);
        }

        *outData = (unsigned char*)data;
        *outDataLen = dataLen;
        return PixelFormat::RGBA8888;
    }

    return format;
}

/*
convert map:
1.PixelFormat::RGBA8888
2.PixelFormat::RGB888
3.PixelFormat::RGB565
4.PixelFormat::A8
5.PixelFormat::I8
6.PixelFormat::AI88
7.PixelFormat::RGBA4444
8.PixelFormat::RGB5A1

gray(5) -> 1235678
gray alpha(6) -> 12345678
rgb(2) -> 1235678
rgba(1) -> 12345678

*/
Texture2D::PixelFormat Texture2D::convertDataToFormat(const unsigned char* data, ssize_t dataLen, PixelFormat originFormat, PixelFormat format, unsigned char** outData, ssize_t* outDataLen)
{
    switch (originFormat)
    {
    case PixelFormat::I8:
        return convertI8ToFormat(data, dataLen, format, outData, outDataLen);
    case PixelFormat::AI88:
        return convertAI88ToFormat(data, dataLen, format, outData, outDataLen);
    case PixelFormat::RGB888:
        return convertRGB888ToFormat(data, dataLen, format, outData, outDataLen);
    case PixelFormat::RGBA8888:
        return convertRGBA8888ToFormat(data, dataLen, format, outData, outDataLen);
    default:
        CCLOG("unsupport convert for format %d to format %d", originFormat, format);
        *outData = (unsigned char*)data;
        *outDataLen = dataLen;
        return originFormat;
    }
}

// implementation Texture2D (Text)
bool Texture2D::initWithString(const char *text, const std::string& fontName, float fontSize, const Size& dimensions/* = Size(0, 0)*/, TextHAlignment hAlignment/* =  TextHAlignment::CENTER */, TextVAlignment vAlignment/* =  TextVAlignment::TOP */)
{
    FontDefinition tempDef;
    
    tempDef._shadow._shadowEnabled = false;
    tempDef._stroke._strokeEnabled = false;
   
    
    tempDef._fontName      = fontName;
    tempDef._fontSize      = fontSize;
    tempDef._dimensions    = dimensions;
    tempDef._alignment     = hAlignment;
    tempDef._vertAlignment = vAlignment;
    tempDef._fontFillColor = Color3B::WHITE;

    return initWithString(text, tempDef);
}

bool Texture2D::initWithString(const char *text, const FontDefinition& textDefinition)
{
    if(!text || 0 == strlen(text))
    {
        return false;
    }

#if CC_ENABLE_CACHE_TEXTURE_DATA
    // cache the texture data
    VolatileTextureMgr::addStringTexture(this, text, textDefinition);
#endif

    bool ret = false;
    Device::TextAlign align;
    
    if (TextVAlignment::TOP == textDefinition._vertAlignment)
    {
        align = (TextHAlignment::CENTER == textDefinition._alignment) ? Device::TextAlign::TOP
        : (TextHAlignment::LEFT == textDefinition._alignment) ? Device::TextAlign::TOP_LEFT : Device::TextAlign::TOP_RIGHT;
    }
    else if (TextVAlignment::CENTER == textDefinition._vertAlignment)
    {
        align = (TextHAlignment::CENTER == textDefinition._alignment) ? Device::TextAlign::CENTER
        : (TextHAlignment::LEFT == textDefinition._alignment) ? Device::TextAlign::LEFT : Device::TextAlign::RIGHT;
    }
    else if (TextVAlignment::BOTTOM == textDefinition._vertAlignment)
    {
        align = (TextHAlignment::CENTER == textDefinition._alignment) ? Device::TextAlign::BOTTOM
        : (TextHAlignment::LEFT == textDefinition._alignment) ? Device::TextAlign::BOTTOM_LEFT : Device::TextAlign::BOTTOM_RIGHT;
    }
    else
    {
        CCASSERT(false, "Not supported alignment format!");
        return false;
    }
    
#if (CC_TARGET_PLATFORM != CC_PLATFORM_ANDROID) && (CC_TARGET_PLATFORM != CC_PLATFORM_IOS)
    CCASSERT(textDefinition._stroke._strokeEnabled == false, "Currently stroke only supported on iOS and Android!");
#endif

    PixelFormat      pixelFormat = g_defaultAlphaPixelFormat;
    unsigned char* outTempData = nullptr;
    ssize_t outTempDataLen = 0;

    int imageWidth;
    int imageHeight;
    auto textDef = textDefinition;
    auto contentScaleFactor = CC_CONTENT_SCALE_FACTOR();
    textDef._fontSize *= contentScaleFactor;
    textDef._dimensions.width *= contentScaleFactor;
    textDef._dimensions.height *= contentScaleFactor;
    textDef._stroke._strokeSize *= contentScaleFactor;
    textDef._shadow._shadowEnabled = false;
    
    Data outData = Device::getTextureDataForText(text, textDef, align, imageWidth, imageHeight, _hasPremultipliedAlpha);
    if(outData.isNull())
    {
        return false;
    }

    Size  imageSize = Size((float)imageWidth, (float)imageHeight);
    pixelFormat = convertDataToFormat(outData.getBytes(), imageWidth*imageHeight*4, PixelFormat::RGBA8888, pixelFormat, &outTempData, &outTempDataLen);

    ret = initWithData(outTempData, outTempDataLen, pixelFormat, imageWidth, imageHeight, imageSize);

    if (outTempData != nullptr && outTempData != outData.getBytes())
    {
        free(outTempData);
    }

    return ret;
}


// implementation Texture2D (Drawing)

void Texture2D::drawAtPoint(const Vector2& point)
{
    GLfloat    coordinates[] = {
        0.0f,    _maxT,
        _maxS,_maxT,
        0.0f,    0.0f,
        _maxS,0.0f };

    GLfloat    width = (GLfloat)_pixelsWide * _maxS,
        height = (GLfloat)_pixelsHigh * _maxT;

    GLfloat        vertices[] = {    
        point.x,            point.y,
        width + point.x,    point.y,
        point.x,            height  + point.y,
        width + point.x,    height  + point.y };

    GL::enableVertexAttribs( GL::VERTEX_ATTRIB_FLAG_POSITION | GL::VERTEX_ATTRIB_FLAG_TEX_COORDS );
    _shaderProgram->use();
    _shaderProgram->setUniformsForBuiltins();

    GL::bindTexture2D( _name );


#ifdef EMSCRIPTEN
    setGLBufferData(vertices, 8 * sizeof(GLfloat), 0);
    glVertexAttribPointer(GLProgram::VERTEX_ATTRIB_POSITION, 2, GL_FLOAT, GL_FALSE, 0, 0);

    setGLBufferData(coordinates, 8 * sizeof(GLfloat), 1);
    glVertexAttribPointer(GLProgram::VERTEX_ATTRIB_TEX_COORD, 2, GL_FLOAT, GL_FALSE, 0, 0);
#else
    glVertexAttribPointer(GLProgram::VERTEX_ATTRIB_POSITION, 2, GL_FLOAT, GL_FALSE, 0, vertices);
    glVertexAttribPointer(GLProgram::VERTEX_ATTRIB_TEX_COORD, 2, GL_FLOAT, GL_FALSE, 0, coordinates);
#endif // EMSCRIPTEN

    glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
}

void Texture2D::drawInRect(const Rect& 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*/ };

    GL::enableVertexAttribs( GL::VERTEX_ATTRIB_FLAG_POSITION | GL::VERTEX_ATTRIB_FLAG_TEX_COORDS );
    _shaderProgram->use();
    _shaderProgram->setUniformsForBuiltins();

    GL::bindTexture2D( _name );

#ifdef EMSCRIPTEN
    setGLBufferData(vertices, 8 * sizeof(GLfloat), 0);
    glVertexAttribPointer(GLProgram::VERTEX_ATTRIB_POSITION, 2, GL_FLOAT, GL_FALSE, 0, 0);

    setGLBufferData(coordinates, 8 * sizeof(GLfloat), 1);
    glVertexAttribPointer(GLProgram::VERTEX_ATTRIB_TEX_COORD, 2, GL_FLOAT, GL_FALSE, 0, 0);
#else
    glVertexAttribPointer(GLProgram::VERTEX_ATTRIB_POSITION, 2, GL_FLOAT, GL_FALSE, 0, vertices);
    glVertexAttribPointer(GLProgram::VERTEX_ATTRIB_TEX_COORD, 2, GL_FLOAT, GL_FALSE, 0, coordinates);
#endif // EMSCRIPTEN
    glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
}

void Texture2D::PVRImagesHavePremultipliedAlpha(bool haveAlphaPremultiplied)
{
    _PVRHaveAlphaPremultiplied = haveAlphaPremultiplied;
}

    
//
// Use to apply MIN/MAG filter
//
// implementation Texture2D (GLFilter)

void Texture2D::generateMipmap()
{
    CCASSERT(_pixelsWide == ccNextPOT(_pixelsWide) && _pixelsHigh == ccNextPOT(_pixelsHigh), "Mipmap texture only works in POT textures");
    GL::bindTexture2D( _name );
    glGenerateMipmap(GL_TEXTURE_2D);
    _hasMipmaps = true;
#if CC_ENABLE_CACHE_TEXTURE_DATA
    VolatileTextureMgr::setHasMipmaps(this, _hasMipmaps);
#endif
}

bool Texture2D::hasMipmaps() const
{
    return _hasMipmaps;
}

void Texture2D::setTexParameters(const TexParams &texParams)
{
    CCASSERT((_pixelsWide == ccNextPOT(_pixelsWide) || texParams.wrapS == GL_CLAMP_TO_EDGE) &&
        (_pixelsHigh == ccNextPOT(_pixelsHigh) || texParams.wrapT == GL_CLAMP_TO_EDGE),
        "GL_CLAMP_TO_EDGE should be used in NPOT dimensions");

    GL::bindTexture2D( _name );
    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 );

#if CC_ENABLE_CACHE_TEXTURE_DATA
    VolatileTextureMgr::setTexParameters(this, texParams);
#endif
}

void Texture2D::setAliasTexParameters()
{
    if (! _antialiasEnabled)
    {
        return;
    }

    _antialiasEnabled = false;

    if (_name == 0)
    {
        return;
    }

    GL::bindTexture2D( _name );

    if( ! _hasMipmaps )
    {
        glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
    }
    else
    {
        glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST );
    }

    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
#if CC_ENABLE_CACHE_TEXTURE_DATA
    TexParams texParams = {(GLuint)(_hasMipmaps?GL_NEAREST_MIPMAP_NEAREST:GL_NEAREST),GL_NEAREST,GL_NONE,GL_NONE};
    VolatileTextureMgr::setTexParameters(this, texParams);
#endif
}

void Texture2D::setAntiAliasTexParameters()
{
    if ( _antialiasEnabled )
    {
        return;
    }

    _antialiasEnabled = true;

    if (_name == 0)
    {
        return;
    }

    GL::bindTexture2D( _name );

    if( ! _hasMipmaps )
    {
        glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
    }
    else
    {
        glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST );
    }

    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
#if CC_ENABLE_CACHE_TEXTURE_DATA
    TexParams texParams = {(GLuint)(_hasMipmaps?GL_LINEAR_MIPMAP_NEAREST:GL_LINEAR),GL_LINEAR,GL_NONE,GL_NONE};
    VolatileTextureMgr::setTexParameters(this, texParams);
#endif
}

const char* Texture2D::getStringForFormat() const
{
	switch (_pixelFormat) 
	{
		case Texture2D::PixelFormat::RGBA8888:
			return  "RGBA8888";

		case Texture2D::PixelFormat::RGB888:
			return  "RGB888";

		case Texture2D::PixelFormat::RGB565:
			return  "RGB565";

		case Texture2D::PixelFormat::RGBA4444:
			return  "RGBA4444";

		case Texture2D::PixelFormat::RGB5A1:
			return  "RGB5A1";

		case Texture2D::PixelFormat::AI88:
			return  "AI88";

		case Texture2D::PixelFormat::A8:
			return  "A8";

		case Texture2D::PixelFormat::I8:
			return  "I8";

		case Texture2D::PixelFormat::PVRTC4:
			return  "PVRTC4";

		case Texture2D::PixelFormat::PVRTC2:
			return  "PVRTC2";

		default:
			CCASSERT(false , "unrecognized pixel format");
			CCLOG("stringForFormat: %ld, cannot give useful result", (long)_pixelFormat);
			break;
	}

	return  nullptr;
}

//
// Texture options for images that contains alpha
//
// implementation Texture2D (PixelFormat)

void Texture2D::setDefaultAlphaPixelFormat(Texture2D::PixelFormat format)
{
    g_defaultAlphaPixelFormat = format;
}

Texture2D::PixelFormat Texture2D::getDefaultAlphaPixelFormat()
{
    return g_defaultAlphaPixelFormat;
}

unsigned int Texture2D::getBitsPerPixelForFormat(Texture2D::PixelFormat format) const
{
    if (format == PixelFormat::NONE)
    {
        return 0;
    }
    
	return _pixelFormatInfoTables.at(format).bpp;
}

unsigned int Texture2D::getBitsPerPixelForFormat() const
{
	return this->getBitsPerPixelForFormat(_pixelFormat);
}

const Texture2D::PixelFormatInfoMap& Texture2D::getPixelFormatInfoMap()
{
    return _pixelFormatInfoTables;
}


NS_CC_END