Texture.cpp

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Author : jbauman@chromium.org
Date : 2011-05-03 20:45:27
Hash : e2f954cd
Message : Validate cube texsubimage based on current face Apps can load cube faces in an arbitrary order, so validating texsubimage based on the format of only the first face won't work. BUG=149 TEST= Review URL: http://codereview.appspot.com/4445085 git-svn-id: https://angleproject.googlecode.com/svn/trunk@629 736b8ea6-26fd-11df-bfd4-992fa37f6226
src/libGLESv2/Texture.cpp
//
// Copyright (c) 2002-2010 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//

// Texture.cpp: Implements the gl::Texture class and its derived classes
// Texture2D and TextureCubeMap. Implements GL texture objects and related
// functionality. [OpenGL ES 2.0.24] section 3.7 page 63.

#include "libGLESv2/Texture.h"

#include <d3dx9tex.h>

#include <algorithm>

#include "common/debug.h"

#include "libEGL/Display.h"

#include "libGLESv2/main.h"
#include "libGLESv2/mathutil.h"
#include "libGLESv2/utilities.h"
#include "libGLESv2/Blit.h"
#include "libGLESv2/Framebuffer.h"

namespace gl
{
unsigned int Texture::mCurrentSerial = 1;

Texture::Image::Image()
  : width(0), height(0), dirty(false), surface(NULL), format(GL_NONE), type(GL_UNSIGNED_BYTE)
{
}

Texture::Image::~Image()
{
    if (surface)
    {
        surface->Release();
    }
}

bool Texture::Image::isRenderable() const
{    
    switch(getD3DFormat())
    {
      case D3DFMT_L8:
      case D3DFMT_A8L8:
      case D3DFMT_DXT1:
        return false;
      case D3DFMT_A8R8G8B8:
      case D3DFMT_X8R8G8B8:
      case D3DFMT_A16B16G16R16F:
      case D3DFMT_A32B32G32R32F:
        return true;
      default:
        UNREACHABLE();
    }

    return false;
}

D3DFORMAT Texture::Image::getD3DFormat() const
{
    if (format == GL_COMPRESSED_RGB_S3TC_DXT1_EXT ||
        format == GL_COMPRESSED_RGBA_S3TC_DXT1_EXT)
    {
        return D3DFMT_DXT1;
    }
    else if (type == GL_FLOAT)
    {
        return D3DFMT_A32B32G32R32F;
    }
    else if (type == GL_HALF_FLOAT_OES)
    {
        return D3DFMT_A16B16G16R16F;
    }
    else if (type == GL_UNSIGNED_BYTE)
    {
        if (format == GL_LUMINANCE && getContext()->supportsLuminanceTextures())
        {
            return D3DFMT_L8;
        }
        else if (format == GL_LUMINANCE_ALPHA && getContext()->supportsLuminanceAlphaTextures())
        {
            return D3DFMT_A8L8;
        }
        else if (format == GL_RGB)
        {
            return D3DFMT_X8R8G8B8;
        }

        return D3DFMT_A8R8G8B8;
    }

    return D3DFMT_A8R8G8B8;
}

Texture::Texture(GLuint id) : RefCountObject(id), mSerial(issueSerial())
{
    mMinFilter = GL_NEAREST_MIPMAP_LINEAR;
    mMagFilter = GL_LINEAR;
    mWrapS = GL_REPEAT;
    mWrapT = GL_REPEAT;
    mDirtyParameter = true;
    
    mDirtyImage = true;
    
    mIsRenderable = false;
}

Texture::~Texture()
{
}

Blit *Texture::getBlitter()
{
    Context *context = getContext();
    return context->getBlitter();
}

// Returns true on successful filter state update (valid enum parameter)
bool Texture::setMinFilter(GLenum filter)
{
    switch (filter)
    {
      case GL_NEAREST:
      case GL_LINEAR:
      case GL_NEAREST_MIPMAP_NEAREST:
      case GL_LINEAR_MIPMAP_NEAREST:
      case GL_NEAREST_MIPMAP_LINEAR:
      case GL_LINEAR_MIPMAP_LINEAR:
        {
            if (mMinFilter != filter)
            {
                mMinFilter = filter;
                mDirtyParameter = true;
            }
            return true;
        }
      default:
        return false;
    }
}

// Returns true on successful filter state update (valid enum parameter)
bool Texture::setMagFilter(GLenum filter)
{
    switch (filter)
    {
      case GL_NEAREST:
      case GL_LINEAR:
        {
            if (mMagFilter != filter)
            {
                mMagFilter = filter;
                mDirtyParameter = true;
            }
            return true;
        }
      default:
        return false;
    }
}

// Returns true on successful wrap state update (valid enum parameter)
bool Texture::setWrapS(GLenum wrap)
{
    switch (wrap)
    {
      case GL_REPEAT:
      case GL_CLAMP_TO_EDGE:
      case GL_MIRRORED_REPEAT:
        {
            if (mWrapS != wrap)
            {
                mWrapS = wrap;
                mDirtyParameter = true;
            }
            return true;
        }
      default:
        return false;
    }
}

// Returns true on successful wrap state update (valid enum parameter)
bool Texture::setWrapT(GLenum wrap)
{
    switch (wrap)
    {
      case GL_REPEAT:
      case GL_CLAMP_TO_EDGE:
      case GL_MIRRORED_REPEAT:
        {
            if (mWrapT != wrap)
            {
                mWrapT = wrap;
                mDirtyParameter = true;
            }
            return true;
        }
      default:
        return false;
    }
}

GLenum Texture::getMinFilter() const
{
    return mMinFilter;
}

GLenum Texture::getMagFilter() const
{
    return mMagFilter;
}

GLenum Texture::getWrapS() const
{
    return mWrapS;
}

GLenum Texture::getWrapT() const
{
    return mWrapT;
}

// Store the pixel rectangle designated by xoffset,yoffset,width,height with pixels stored as format/type at input
// into the target pixel rectangle at output with outputPitch bytes in between each line.
void Texture::loadImageData(GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type,
                            GLint unpackAlignment, const void *input, size_t outputPitch, void *output, D3DSURFACE_DESC *description) const
{
    GLsizei inputPitch = -ComputePitch(width, format, type, unpackAlignment);
    input = ((char*)input) - inputPitch * (height - 1);

    switch (type)
    {
      case GL_UNSIGNED_BYTE:
        switch (format)
        {
          case GL_ALPHA:
            loadAlphaImageData(xoffset, yoffset, width, height, inputPitch, input, outputPitch, output);
            break;
          case GL_LUMINANCE:
            loadLuminanceImageData(xoffset, yoffset, width, height, inputPitch, input, outputPitch, output, description->Format == D3DFMT_L8);
            break;
          case GL_LUMINANCE_ALPHA:
            loadLuminanceAlphaImageData(xoffset, yoffset, width, height, inputPitch, input, outputPitch, output, description->Format == D3DFMT_A8L8);
            break;
          case GL_RGB:
            loadRGBUByteImageData(xoffset, yoffset, width, height, inputPitch, input, outputPitch, output);
            break;
          case GL_RGBA:
            loadRGBAUByteImageData(xoffset, yoffset, width, height, inputPitch, input, outputPitch, output);
            break;
          case GL_BGRA_EXT:
            loadBGRAImageData(xoffset, yoffset, width, height, inputPitch, input, outputPitch, output);
            break;
          default: UNREACHABLE();
        }
        break;
      case GL_UNSIGNED_SHORT_5_6_5:
        switch (format)
        {
          case GL_RGB:
            loadRGB565ImageData(xoffset, yoffset, width, height, inputPitch, input, outputPitch, output);
            break;
          default: UNREACHABLE();
        }
        break;
      case GL_UNSIGNED_SHORT_4_4_4_4:
        switch (format)
        {
          case GL_RGBA:
            loadRGBA4444ImageData(xoffset, yoffset, width, height, inputPitch, input, outputPitch, output);
            break;
          default: UNREACHABLE();
        }
        break;
      case GL_UNSIGNED_SHORT_5_5_5_1:
        switch (format)
        {
          case GL_RGBA:
            loadRGBA5551ImageData(xoffset, yoffset, width, height, inputPitch, input, outputPitch, output);
            break;
          default: UNREACHABLE();
        }
        break;
      case GL_FLOAT:
        switch (format)
        {
          // float textures are converted to RGBA, not BGRA, as they're stored that way in D3D
          case GL_ALPHA:
            loadAlphaFloatImageData(xoffset, yoffset, width, height, inputPitch, input, outputPitch, output);
            break;
          case GL_LUMINANCE:
            loadLuminanceFloatImageData(xoffset, yoffset, width, height, inputPitch, input, outputPitch, output);
            break;
          case GL_LUMINANCE_ALPHA:
            loadLuminanceAlphaFloatImageData(xoffset, yoffset, width, height, inputPitch, input, outputPitch, output);
            break;
          case GL_RGB:
            loadRGBFloatImageData(xoffset, yoffset, width, height, inputPitch, input, outputPitch, output);
            break;
          case GL_RGBA:
            loadRGBAFloatImageData(xoffset, yoffset, width, height, inputPitch, input, outputPitch, output);
            break;
          default: UNREACHABLE();
        }
        break;
      case GL_HALF_FLOAT_OES:
        switch (format)
        {
          // float textures are converted to RGBA, not BGRA, as they're stored that way in D3D
          case GL_ALPHA:
            loadAlphaHalfFloatImageData(xoffset, yoffset, width, height, inputPitch, input, outputPitch, output);
            break;
          case GL_LUMINANCE:
            loadLuminanceHalfFloatImageData(xoffset, yoffset, width, height, inputPitch, input, outputPitch, output);
            break;
          case GL_LUMINANCE_ALPHA:
            loadLuminanceAlphaHalfFloatImageData(xoffset, yoffset, width, height, inputPitch, input, outputPitch, output);
            break;
          case GL_RGB:
            loadRGBHalfFloatImageData(xoffset, yoffset, width, height, inputPitch, input, outputPitch, output);
            break;
          case GL_RGBA:
            loadRGBAHalfFloatImageData(xoffset, yoffset, width, height, inputPitch, input, outputPitch, output);
            break;
          default: UNREACHABLE();
        }
        break;
      default: UNREACHABLE();
    }
}

void Texture::loadAlphaImageData(GLint xoffset, GLint yoffset, GLsizei width, GLsizei height,
                                 int inputPitch, const void *input, size_t outputPitch, void *output) const
{
    const unsigned char *source = NULL;
    unsigned char *dest = NULL;
    
    for (int y = 0; y < height; y++)
    {
        source = static_cast<const unsigned char*>(input) + y * inputPitch;
        dest = static_cast<unsigned char*>(output) + (y + yoffset) * outputPitch + xoffset * 4;
        for (int x = 0; x < width; x++)
        {
            dest[4 * x + 0] = 0;
            dest[4 * x + 1] = 0;
            dest[4 * x + 2] = 0;
            dest[4 * x + 3] = source[x];
        }
    }
}

void Texture::loadAlphaFloatImageData(GLint xoffset, GLint yoffset, GLsizei width, GLsizei height,
                                      int inputPitch, const void *input, size_t outputPitch, void *output) const
{
    const float *source = NULL;
    float *dest = NULL;

    for (int y = 0; y < height; y++)
    {
        source = reinterpret_cast<const float*>(static_cast<const unsigned char*>(input) + y * inputPitch);
        dest = reinterpret_cast<float*>(static_cast<unsigned char*>(output) + (y + yoffset) * outputPitch  + xoffset * 16);
        for (int x = 0; x < width; x++)
        {
            dest[4 * x + 0] = 0;
            dest[4 * x + 1] = 0;
            dest[4 * x + 2] = 0;
            dest[4 * x + 3] = source[x];
        }
    }
}

void Texture::loadAlphaHalfFloatImageData(GLint xoffset, GLint yoffset, GLsizei width, GLsizei height,
                                          int inputPitch, const void *input, size_t outputPitch, void *output) const
{
    const unsigned short *source = NULL;
    unsigned short *dest = NULL;

    for (int y = 0; y < height; y++)
    {
        source = reinterpret_cast<const unsigned short*>(static_cast<const unsigned char*>(input) + y * inputPitch);
        dest = reinterpret_cast<unsigned short*>(static_cast<unsigned char*>(output) + (y + yoffset) * outputPitch + xoffset * 8);
        for (int x = 0; x < width; x++)
        {
            dest[4 * x + 0] = 0;
            dest[4 * x + 1] = 0;
            dest[4 * x + 2] = 0;
            dest[4 * x + 3] = source[x];
        }
    }
}

void Texture::loadLuminanceImageData(GLint xoffset, GLint yoffset, GLsizei width, GLsizei height,
                                     int inputPitch, const void *input, size_t outputPitch, void *output, bool native) const
{
    const int destBytesPerPixel = native? 1: 4;
    const unsigned char *source = NULL;
    unsigned char *dest = NULL;

    for (int y = 0; y < height; y++)
    {
        source = static_cast<const unsigned char*>(input) + y * inputPitch;
        dest = static_cast<unsigned char*>(output) + (y + yoffset) * outputPitch + xoffset * destBytesPerPixel;

        if (!native)   // BGRA8 destination format
        {
            for (int x = 0; x < width; x++)
            {
                dest[4 * x + 0] = source[x];
                dest[4 * x + 1] = source[x];
                dest[4 * x + 2] = source[x];
                dest[4 * x + 3] = 0xFF;
            }
        }
        else   // L8 destination format
        {
            memcpy(dest, source, width);
        }
    }
}

void Texture::loadLuminanceFloatImageData(GLint xoffset, GLint yoffset, GLsizei width, GLsizei height,
                                          int inputPitch, const void *input, size_t outputPitch, void *output) const
{
    const float *source = NULL;
    float *dest = NULL;

    for (int y = 0; y < height; y++)
    {
        source = reinterpret_cast<const float*>(static_cast<const unsigned char*>(input) + y * inputPitch);
        dest = reinterpret_cast<float*>(static_cast<unsigned char*>(output) + (y + yoffset) * outputPitch  + xoffset * 16);
        for (int x = 0; x < width; x++)
        {
            dest[4 * x + 0] = source[x];
            dest[4 * x + 1] = source[x];
            dest[4 * x + 2] = source[x];
            dest[4 * x + 3] = 1.0f;
        }
    }
}

void Texture::loadLuminanceHalfFloatImageData(GLint xoffset, GLint yoffset, GLsizei width, GLsizei height,
                                                   int inputPitch, const void *input, size_t outputPitch, void *output) const
{
    const unsigned short *source = NULL;
    unsigned short *dest = NULL;

    for (int y = 0; y < height; y++)
    {
        source = reinterpret_cast<const unsigned short*>(static_cast<const unsigned char*>(input) + y * inputPitch);
        dest = reinterpret_cast<unsigned short*>(static_cast<unsigned char*>(output) + (y + yoffset) * outputPitch + xoffset * 8);
        for (int x = 0; x < width; x++)
        {
            dest[4 * x + 0] = source[x];
            dest[4 * x + 1] = source[x];
            dest[4 * x + 2] = source[x];
            dest[4 * x + 3] = 0x3C00; // SEEEEEMMMMMMMMMM, S = 0, E = 15, M = 0: 16bit flpt representation of 1
        }
    }
}

void Texture::loadLuminanceAlphaImageData(GLint xoffset, GLint yoffset, GLsizei width, GLsizei height,
                                          int inputPitch, const void *input, size_t outputPitch, void *output, bool native) const
{
    const int destBytesPerPixel = native? 2: 4;
    const unsigned char *source = NULL;
    unsigned char *dest = NULL;

    for (int y = 0; y < height; y++)
    {
        source = static_cast<const unsigned char*>(input) + y * inputPitch;
        dest = static_cast<unsigned char*>(output) + (y + yoffset) * outputPitch + xoffset * destBytesPerPixel;
        
        if (!native)   // BGRA8 destination format
        {
            for (int x = 0; x < width; x++)
            {
                dest[4 * x + 0] = source[2*x+0];
                dest[4 * x + 1] = source[2*x+0];
                dest[4 * x + 2] = source[2*x+0];
                dest[4 * x + 3] = source[2*x+1];
            }
        }
        else
        {
            memcpy(dest, source, width * 2);
        }
    }
}

void Texture::loadLuminanceAlphaFloatImageData(GLint xoffset, GLint yoffset, GLsizei width, GLsizei height,
                                               int inputPitch, const void *input, size_t outputPitch, void *output) const
{
    const float *source = NULL;
    float *dest = NULL;

    for (int y = 0; y < height; y++)
    {
        source = reinterpret_cast<const float*>(static_cast<const unsigned char*>(input) + y * inputPitch);
        dest = reinterpret_cast<float*>(static_cast<unsigned char*>(output) + (y + yoffset) * outputPitch  + xoffset * 16);
        for (int x = 0; x < width; x++)
        {
            dest[4 * x + 0] = source[2*x+0];
            dest[4 * x + 1] = source[2*x+0];
            dest[4 * x + 2] = source[2*x+0];
            dest[4 * x + 3] = source[2*x+1];
        }
    }
}

void Texture::loadLuminanceAlphaHalfFloatImageData(GLint xoffset, GLint yoffset, GLsizei width, GLsizei height,
                                                   int inputPitch, const void *input, size_t outputPitch, void *output) const
{
    const unsigned short *source = NULL;
    unsigned short *dest = NULL;

    for (int y = 0; y < height; y++)
    {
        source = reinterpret_cast<const unsigned short*>(static_cast<const unsigned char*>(input) + y * inputPitch);
        dest = reinterpret_cast<unsigned short*>(static_cast<unsigned char*>(output) + (y + yoffset) * outputPitch + xoffset * 8);
        for (int x = 0; x < width; x++)
        {
            dest[4 * x + 0] = source[2*x+0];
            dest[4 * x + 1] = source[2*x+0];
            dest[4 * x + 2] = source[2*x+0];
            dest[4 * x + 3] = source[2*x+1];
        }
    }
}

void Texture::loadRGBUByteImageData(GLint xoffset, GLint yoffset, GLsizei width, GLsizei height,
                                    int inputPitch, const void *input, size_t outputPitch, void *output) const
{
    const unsigned char *source = NULL;
    unsigned char *dest = NULL;

    for (int y = 0; y < height; y++)
    {
        source = static_cast<const unsigned char*>(input) + y * inputPitch;
        dest = static_cast<unsigned char*>(output) + (y + yoffset) * outputPitch + xoffset * 4;
        for (int x = 0; x < width; x++)
        {
            dest[4 * x + 0] = source[x * 3 + 2];
            dest[4 * x + 1] = source[x * 3 + 1];
            dest[4 * x + 2] = source[x * 3 + 0];
            dest[4 * x + 3] = 0xFF;
        }
    }
}

void Texture::loadRGB565ImageData(GLint xoffset, GLint yoffset, GLsizei width, GLsizei height,
                                  int inputPitch, const void *input, size_t outputPitch, void *output) const
{
    const unsigned short *source = NULL;
    unsigned char *dest = NULL;

    for (int y = 0; y < height; y++)
    {
        source = reinterpret_cast<const unsigned short*>(static_cast<const unsigned char*>(input) + y * inputPitch);
        dest = static_cast<unsigned char*>(output) + (y + yoffset) * outputPitch + xoffset * 4;
        for (int x = 0; x < width; x++)
        {
            unsigned short rgba = source[x];
            dest[4 * x + 0] = ((rgba & 0x001F) << 3) | ((rgba & 0x001F) >> 2);
            dest[4 * x + 1] = ((rgba & 0x07E0) >> 3) | ((rgba & 0x07E0) >> 9);
            dest[4 * x + 2] = ((rgba & 0xF800) >> 8) | ((rgba & 0xF800) >> 13);
            dest[4 * x + 3] = 0xFF;
        }
    }
}

void Texture::loadRGBFloatImageData(GLint xoffset, GLint yoffset, GLsizei width, GLsizei height,
                                    int inputPitch, const void *input, size_t outputPitch, void *output) const
{
    const float *source = NULL;
    float *dest = NULL;

    for (int y = 0; y < height; y++)
    {
        source = reinterpret_cast<const float*>(static_cast<const unsigned char*>(input) + y * inputPitch);
        dest = reinterpret_cast<float*>(static_cast<unsigned char*>(output) + (y + yoffset) * outputPitch  + xoffset * 16);
        for (int x = 0; x < width; x++)
        {
            dest[4 * x + 0] = source[x * 3 + 0];
            dest[4 * x + 1] = source[x * 3 + 1];
            dest[4 * x + 2] = source[x * 3 + 2];
            dest[4 * x + 3] = 1.0f;
        }
    }
}

void Texture::loadRGBHalfFloatImageData(GLint xoffset, GLint yoffset, GLsizei width, GLsizei height,
                                        int inputPitch, const void *input, size_t outputPitch, void *output) const
{
    const unsigned short *source = NULL;
    unsigned short *dest = NULL;

    for (int y = 0; y < height; y++)
    {
        source = reinterpret_cast<const unsigned short*>(static_cast<const unsigned char*>(input) + y * inputPitch);
        dest = reinterpret_cast<unsigned short*>(static_cast<unsigned char*>(output) + (y + yoffset) * outputPitch  + xoffset * 8);
        for (int x = 0; x < width; x++)
        {
            dest[4 * x + 0] = source[x * 3 + 0];
            dest[4 * x + 1] = source[x * 3 + 1];
            dest[4 * x + 2] = source[x * 3 + 2];
            dest[4 * x + 3] = 0x3C00; // SEEEEEMMMMMMMMMM, S = 0, E = 15, M = 0: 16bit flpt representation of 1
        }
    }
}

void Texture::loadRGBAUByteImageData(GLint xoffset, GLint yoffset, GLsizei width, GLsizei height,
                                     int inputPitch, const void *input, size_t outputPitch, void *output) const
{
    const unsigned char *source = NULL;
    unsigned char *dest = NULL;

    for (int y = 0; y < height; y++)
    {
        source = static_cast<const unsigned char*>(input) + y * inputPitch;
        dest = static_cast<unsigned char*>(output) + (y + yoffset) * outputPitch + xoffset * 4;
        for (int x = 0; x < width; x++)
        {
            dest[4 * x + 0] = source[x * 4 + 2];
            dest[4 * x + 1] = source[x * 4 + 1];
            dest[4 * x + 2] = source[x * 4 + 0];
            dest[4 * x + 3] = source[x * 4 + 3];
        }
    }
}

void Texture::loadRGBA4444ImageData(GLint xoffset, GLint yoffset, GLsizei width, GLsizei height,
                                    int inputPitch, const void *input, size_t outputPitch, void *output) const
{
    const unsigned short *source = NULL;
    unsigned char *dest = NULL;

    for (int y = 0; y < height; y++)
    {
        source = reinterpret_cast<const unsigned short*>(static_cast<const unsigned char*>(input) + y * inputPitch);
        dest = static_cast<unsigned char*>(output) + (y + yoffset) * outputPitch + xoffset * 4;
        for (int x = 0; x < width; x++)
        {
            unsigned short rgba = source[x];
            dest[4 * x + 0] = ((rgba & 0x00F0) << 0) | ((rgba & 0x00F0) >> 4);
            dest[4 * x + 1] = ((rgba & 0x0F00) >> 4) | ((rgba & 0x0F00) >> 8);
            dest[4 * x + 2] = ((rgba & 0xF000) >> 8) | ((rgba & 0xF000) >> 12);
            dest[4 * x + 3] = ((rgba & 0x000F) << 4) | ((rgba & 0x000F) >> 0);
        }
    }
}

void Texture::loadRGBA5551ImageData(GLint xoffset, GLint yoffset, GLsizei width, GLsizei height,
                                    int inputPitch, const void *input, size_t outputPitch, void *output) const
{
    const unsigned short *source = NULL;
    unsigned char *dest = NULL;

    for (int y = 0; y < height; y++)
    {
        source = reinterpret_cast<const unsigned short*>(static_cast<const unsigned char*>(input) + y * inputPitch);
        dest = static_cast<unsigned char*>(output) + (y + yoffset) * outputPitch + xoffset * 4;
        for (int x = 0; x < width; x++)
        {
            unsigned short rgba = source[x];
            dest[4 * x + 0] = ((rgba & 0x003E) << 2) | ((rgba & 0x003E) >> 3);
            dest[4 * x + 1] = ((rgba & 0x07C0) >> 3) | ((rgba & 0x07C0) >> 8);
            dest[4 * x + 2] = ((rgba & 0xF800) >> 8) | ((rgba & 0xF800) >> 13);
            dest[4 * x + 3] = (rgba & 0x0001) ? 0xFF : 0;
        }
    }
}

void Texture::loadRGBAFloatImageData(GLint xoffset, GLint yoffset, GLsizei width, GLsizei height,
                                     int inputPitch, const void *input, size_t outputPitch, void *output) const
{
    const float *source = NULL;
    float *dest = NULL;

    for (int y = 0; y < height; y++)
    {
        source = reinterpret_cast<const float*>(static_cast<const unsigned char*>(input) + y * inputPitch);
        dest = reinterpret_cast<float*>(static_cast<unsigned char*>(output) + (y + yoffset) * outputPitch  + xoffset * 16);
        memcpy(dest, source, width * 16);
    }
}

void Texture::loadRGBAHalfFloatImageData(GLint xoffset, GLint yoffset, GLsizei width, GLsizei height,
                                        int inputPitch, const void *input, size_t outputPitch, void *output) const
{
    const unsigned char *source = NULL;
    unsigned char *dest = NULL;

    for (int y = 0; y < height; y++)
    {
        source = static_cast<const unsigned char*>(input) + y * inputPitch;
        dest = static_cast<unsigned char*>(output) + (y + yoffset) * outputPitch  + xoffset * 8;
        memcpy(dest, source, width * 8);
    }
}

void Texture::loadBGRAImageData(GLint xoffset, GLint yoffset, GLsizei width, GLsizei height,
                                int inputPitch, const void *input, size_t outputPitch, void *output) const
{
    const unsigned char *source = NULL;
    unsigned char *dest = NULL;

    for (int y = 0; y < height; y++)
    {
        source = static_cast<const unsigned char*>(input) + y * inputPitch;
        dest = static_cast<unsigned char*>(output) + (y + yoffset) * outputPitch + xoffset * 4;
        memcpy(dest, source, width*4);
    }
}

void Texture::loadCompressedImageData(GLint xoffset, GLint yoffset, GLsizei width, GLsizei height,
                                      int inputPitch, const void *input, size_t outputPitch, void *output) const
{
    ASSERT(xoffset % 4 == 0);
    ASSERT(yoffset % 4 == 0);
    ASSERT(width % 4 == 0 || width == 2 || width == 1);
    ASSERT(inputPitch % 8 == 0);
    ASSERT(outputPitch % 8 == 0);

    const unsigned int *source = reinterpret_cast<const unsigned int*>(input);
    unsigned int *dest = reinterpret_cast<unsigned int*>(output);

    switch (height)
    {
        case 1:
            // Round width up in case it is 1.
            for (int x = 0; x < (width + 1) / 2; x += 2)
            {
                // First 32-bits is two RGB565 colors shared by tile and does not need to be modified.
                dest[x] = source[x];

                // Second 32-bits contains 4 rows of 4 2-bit interpolants between the colors, the last 3 rows being unused. No flipping should occur.
                dest[x + 1] = source[x + 1];
            }
            break;
        case 2:
            // Round width up in case it is 1.
            for (int x = 0; x < (width + 1) / 2; x += 2)
            {
                // First 32-bits is two RGB565 colors shared by tile and does not need to be modified.
                dest[x] = source[x];

                // Second 32-bits contains 4 rows of 4 2-bit interpolants between the colors, the last 2 rows being unused. Only the top 2 rows should be flipped.
                dest[x + 1] = ((source[x + 1] << 8) & 0x0000FF00) |
                              ((source[x + 1] >> 8) & 0x000000FF);       
            }
            break;
        default:
            ASSERT(height % 4 == 0);
            for (int y = 0; y < height / 4; ++y)
            {
                const unsigned int *source = reinterpret_cast<const unsigned int*>(static_cast<const unsigned char*>(input) + y * inputPitch);
                unsigned int *dest = reinterpret_cast<unsigned int*>(static_cast<unsigned char*>(output) + (y + yoffset) * outputPitch + xoffset * 8);

                // Round width up in case it is 1.
                for (int x = 0; x < (width + 1) / 2; x += 2)
                {
                    // First 32-bits is two RGB565 colors shared by tile and does not need to be modified.
                    dest[x] = source[x];

                    // Second 32-bits contains 4 rows of 4 2-bit interpolants between the colors. All rows should be flipped.
                    dest[x + 1] = (source[x + 1] >> 24) | 
                                  ((source[x + 1] << 8) & 0x00FF0000) |
                                  ((source[x + 1] >> 8) & 0x0000FF00) |
                                  (source[x + 1] << 24);                    
                }
            }
            break;
    }
}

void Texture::createSurface(Image *image)
{
    IDirect3DTexture9 *newTexture = NULL;
    IDirect3DSurface9 *newSurface = NULL;

    if (image->width != 0 && image->height != 0)
    {
        int levelToFetch = 0;
        GLsizei requestWidth = image->width;
        GLsizei requestHeight = image->height;
        if (IsCompressed(image->format) && (image->width % 4 != 0 || image->height % 4 != 0))
        {
            bool isMult4 = false;
            int upsampleCount = 0;
            while (!isMult4)
            {
                requestWidth <<= 1;
                requestHeight <<= 1;
                upsampleCount++;
                if (requestWidth % 4 == 0 && requestHeight % 4 == 0)
                {
                    isMult4 = true;
                }
            }
            levelToFetch = upsampleCount;
        }

        HRESULT result = getDevice()->CreateTexture(requestWidth, requestHeight, levelToFetch + 1, NULL, image->getD3DFormat(),
                                                    D3DPOOL_SYSTEMMEM, &newTexture, NULL);

        if (FAILED(result))
        {
            ASSERT(result == D3DERR_OUTOFVIDEOMEMORY || result == E_OUTOFMEMORY);
            return error(GL_OUT_OF_MEMORY);
        }

        newTexture->GetSurfaceLevel(levelToFetch, &newSurface);
        newTexture->Release();
    }

    if (image->surface)
    {
        image->surface->Release();
    }

    image->surface = newSurface;
}

void Texture::setImage(GLint unpackAlignment, const void *pixels, Image *image)
{
    createSurface(image);

    if (pixels != NULL && image->surface != NULL)
    {
        D3DSURFACE_DESC description;
        image->surface->GetDesc(&description);

        D3DLOCKED_RECT locked;
        HRESULT result = image->surface->LockRect(&locked, NULL, 0);

        ASSERT(SUCCEEDED(result));

        if (SUCCEEDED(result))
        {
            loadImageData(0, 0, image->width, image->height, image->format, image->type, unpackAlignment, pixels, locked.Pitch, locked.pBits, &description);
            image->surface->UnlockRect();
        }

        image->dirty = true;
        mDirtyImage = true;
    }
}

void Texture::setCompressedImage(GLsizei imageSize, const void *pixels, Image *image)
{
    createSurface(image);

    if (pixels != NULL && image->surface != NULL)
    {
        D3DLOCKED_RECT locked;
        HRESULT result = image->surface->LockRect(&locked, NULL, 0);

        ASSERT(SUCCEEDED(result));

        if (SUCCEEDED(result))
        {
            int inputPitch = ComputeCompressedPitch(image->width, image->format);
            int inputSize = ComputeCompressedSize(image->width, image->height, image->format);
            loadCompressedImageData(0, 0, image->width, image->height, -inputPitch, static_cast<const char*>(pixels) + inputSize - inputPitch, locked.Pitch, locked.pBits);
            image->surface->UnlockRect();
        }

        image->dirty = true;
        mDirtyImage = true;
    }
}

bool Texture::subImage(GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, GLint unpackAlignment, const void *pixels, Image *image)
{
    if (width + xoffset > image->width || height + yoffset > image->height)
    {
        error(GL_INVALID_VALUE);
        return false;
    }

    if (IsCompressed(image->format))
    {
        error(GL_INVALID_OPERATION);
        return false;
    }

    if (format != image->format)
    {
        error(GL_INVALID_OPERATION);
        return false;
    }

    if (!image->surface)
    {
        createSurface(image);
    }

    if (pixels != NULL && image->surface != NULL)
    {
        D3DSURFACE_DESC description;
        image->surface->GetDesc(&description);

        D3DLOCKED_RECT locked;
        HRESULT result = image->surface->LockRect(&locked, NULL, 0);

        ASSERT(SUCCEEDED(result));

        if (SUCCEEDED(result))
        {
            loadImageData(xoffset, transformPixelYOffset(yoffset, height, image->height), width, height, format, type, unpackAlignment, pixels, locked.Pitch, locked.pBits, &description);
            image->surface->UnlockRect();
        }

        image->dirty = true;
        mDirtyImage = true;
    }

    return true;
}

bool Texture::subImageCompressed(GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLsizei imageSize, const void *pixels, Image *image)
{
    if (width + xoffset > image->width || height + yoffset > image->height)
    {
        error(GL_INVALID_VALUE);
        return false;
    }

    if (format != getInternalFormat())
    {
        error(GL_INVALID_OPERATION);
        return false;
    }

    if (!image->surface)
    {
        createSurface(image);
    }

    if (pixels != NULL && image->surface != NULL)
    {
        RECT updateRegion;
        updateRegion.left = xoffset;
        updateRegion.right = xoffset + width;
        updateRegion.bottom = yoffset + height;
        updateRegion.top = yoffset;

        D3DLOCKED_RECT locked;
        HRESULT result = image->surface->LockRect(&locked, &updateRegion, 0);

        ASSERT(SUCCEEDED(result));

        if (SUCCEEDED(result))
        {
            int inputPitch = ComputeCompressedPitch(width, format);
            int inputSize = ComputeCompressedSize(width, height, format);
            loadCompressedImageData(xoffset, transformPixelYOffset(yoffset, height, image->height), width, height, -inputPitch, static_cast<const char*>(pixels) + inputSize - inputPitch, locked.Pitch, locked.pBits);
            image->surface->UnlockRect();
        }

        image->dirty = true;
        mDirtyImage = true;
    }

    return true;
}

// This implements glCopyTex[Sub]Image2D for non-renderable internal texture formats and incomplete textures
void Texture::copyToImage(Image *image, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height, IDirect3DSurface9 *renderTarget)
{
    if (!image->surface)
    {
        createSurface(image);

        if (!image->surface)
        {
            ERR("Failed to create an image surface.");
            return error(GL_OUT_OF_MEMORY);
        }
    }

    IDirect3DDevice9 *device = getDevice();
    IDirect3DSurface9 *renderTargetData = NULL;
    D3DSURFACE_DESC description;
    renderTarget->GetDesc(&description);
    
    HRESULT result = device->CreateOffscreenPlainSurface(description.Width, description.Height, description.Format, D3DPOOL_SYSTEMMEM, &renderTargetData, NULL);

    if (FAILED(result))
    {
        ERR("Could not create matching destination surface.");
        return error(GL_OUT_OF_MEMORY);
    }

    result = device->GetRenderTargetData(renderTarget, renderTargetData);

    if (FAILED(result))
    {
        ERR("GetRenderTargetData unexpectedly failed.");
        renderTargetData->Release();
        return error(GL_OUT_OF_MEMORY);
    }

    RECT sourceRect = transformPixelRect(x, y, width, height, description.Height);
    int destYOffset = transformPixelYOffset(yoffset, height, image->height);
    RECT destRect = {xoffset, destYOffset, xoffset + width, destYOffset + height};

    if (image->isRenderable())
    {
        result = D3DXLoadSurfaceFromSurface(image->surface, NULL, &destRect, renderTargetData, NULL, &sourceRect, D3DX_FILTER_BOX, 0);
        
        if (FAILED(result))
        {
            ERR("Copying surfaces unexpectedly failed.");
            renderTargetData->Release();
            return error(GL_OUT_OF_MEMORY);
        }
    }
    else
    {
        D3DLOCKED_RECT sourceLock = {0};
        result = renderTargetData->LockRect(&sourceLock, &sourceRect, 0);

        if (FAILED(result))
        {
            ERR("Failed to lock the source surface (rectangle might be invalid).");
            renderTargetData->Release();
            return error(GL_OUT_OF_MEMORY);
        }

        D3DLOCKED_RECT destLock = {0};
        result = image->surface->LockRect(&destLock, &destRect, 0);
        
        if (FAILED(result))
        {
            ERR("Failed to lock the destination surface (rectangle might be invalid).");
            renderTargetData->UnlockRect();
            renderTargetData->Release();
            return error(GL_OUT_OF_MEMORY);
        }

        if (destLock.pBits && sourceLock.pBits)
        {
            unsigned char *source = (unsigned char*)sourceLock.pBits;
            unsigned char *dest = (unsigned char*)destLock.pBits;

            switch (description.Format)
            {
              case D3DFMT_X8R8G8B8:
              case D3DFMT_A8R8G8B8:
                switch(image->getD3DFormat())
                {
                  case D3DFMT_L8:
                    for(int y = 0; y < height; y++)
                    {
                        for(int x = 0; x < width; x++)
                        {
                            dest[x] = source[x * 4 + 2];
                        }

                        source += sourceLock.Pitch;
                        dest += destLock.Pitch;
                    }
                    break;
                  case D3DFMT_A8L8:
                    for(int y = 0; y < height; y++)
                    {
                        for(int x = 0; x < width; x++)
                        {
                            dest[x * 2 + 0] = source[x * 4 + 2];
                            dest[x * 2 + 1] = source[x * 4 + 3];
                        }

                        source += sourceLock.Pitch;
                        dest += destLock.Pitch;
                    }
                    break;
                  default:
                    UNREACHABLE();
                }
                break;
              case D3DFMT_R5G6B5:
                switch(image->getD3DFormat())
                {
                  case D3DFMT_L8:
                    for(int y = 0; y < height; y++)
                    {
                        for(int x = 0; x < width; x++)
                        {
                            unsigned char red = source[x * 2 + 1] & 0xF8;
                            dest[x] = red | (red >> 5);
                        }

                        source += sourceLock.Pitch;
                        dest += destLock.Pitch;
                    }
                    break;
                  default:
                    UNREACHABLE();
                }
                break;
              case D3DFMT_A1R5G5B5:
                switch(image->getD3DFormat())
                {
                  case D3DFMT_L8:
                    for(int y = 0; y < height; y++)
                    {
                        for(int x = 0; x < width; x++)
                        {
                            unsigned char red = source[x * 2 + 1] & 0x7C;
                            dest[x] = (red << 1) | (red >> 4);
                        }

                        source += sourceLock.Pitch;
                        dest += destLock.Pitch;
                    }
                    break;
                  case D3DFMT_A8L8:
                    for(int y = 0; y < height; y++)
                    {
                        for(int x = 0; x < width; x++)
                        {
                            unsigned char red = source[x * 2 + 1] & 0x7C;
                            dest[x * 2 + 0] = (red << 1) | (red >> 4);
                            dest[x * 2 + 1] = (signed char)source[x * 2 + 1] >> 7;
                        }

                        source += sourceLock.Pitch;
                        dest += destLock.Pitch;
                    }
                    break;
                  default:
                    UNREACHABLE();
                }
                break;
              default:
                UNREACHABLE();
            }
        }

        image->surface->UnlockRect();
        renderTargetData->UnlockRect();
    }

    renderTargetData->Release();

    image->dirty = true;
    mDirtyImage = true;
}

IDirect3DBaseTexture9 *Texture::getTexture()
{
    if (!isComplete())
    {
        return NULL;
    }

    if (!getBaseTexture())
    {
        createTexture();
    }

    updateTexture();

    return getBaseTexture();
}

bool Texture::isDirtyParameter() const
{
    return mDirtyParameter;
}

bool Texture::isDirtyImage() const
{
    return mDirtyImage;
}

void Texture::resetDirty()
{
    mDirtyParameter = false;
    mDirtyImage = false;
}

unsigned int Texture::getSerial() const
{
    return mSerial;
}

GLint Texture::creationLevels(GLsizei width, GLsizei height, GLint maxlevel) const
{
    if (isPow2(width) && isPow2(height))
    {
        return maxlevel;
    }
    else
    {
        // OpenGL ES 2.0 without GL_OES_texture_npot does not permit NPOT mipmaps.
        return 1;
    }
}

GLint Texture::creationLevels(GLsizei size, GLint maxlevel) const
{
    return creationLevels(size, size, maxlevel);
}

int Texture::levelCount() const
{
    return getBaseTexture() ? getBaseTexture()->GetLevelCount() : 0;
}

unsigned int Texture::issueSerial()
{
    return mCurrentSerial++;
}

Texture2D::Texture2D(GLuint id) : Texture(id)
{
    mTexture = NULL;
    mSurface = NULL;
}

Texture2D::~Texture2D()
{
    mColorbufferProxy.set(NULL);

    if (mTexture)
    {
        mTexture->Release();
        mTexture = NULL;
    }

    if (mSurface)
    {
        mSurface->setBoundTexture(NULL);
        mSurface = NULL;
    }
}

GLenum Texture2D::getTarget() const
{
    return GL_TEXTURE_2D;
}

GLsizei Texture2D::getWidth() const
{
    return mImageArray[0].width;
}

GLsizei Texture2D::getHeight() const
{
    return mImageArray[0].height;
}

GLenum Texture2D::getInternalFormat() const
{
    return mImageArray[0].format;
}

GLenum Texture2D::getType() const
{
    return mImageArray[0].type;
}

D3DFORMAT Texture2D::getD3DFormat() const
{
    return mImageArray[0].getD3DFormat();
}

void Texture2D::redefineTexture(GLint level, GLenum format, GLsizei width, GLsizei height, GLenum type, bool forceRedefine)
{
    GLsizei textureWidth = mImageArray[0].width;
    GLsizei textureHeight = mImageArray[0].height;
    GLenum textureFormat = mImageArray[0].format;
    GLenum textureType = mImageArray[0].type;

    mImageArray[level].width = width;
    mImageArray[level].height = height;
    mImageArray[level].format = format;
    mImageArray[level].type = type;

    if (!mTexture)
    {
        return;
    }

    bool widthOkay = (textureWidth >> level == width) || (textureWidth >> level == 0 && width == 1);
    bool heightOkay = (textureHeight >> level == height) || (textureHeight >> level == 0 && height == 1);
    bool textureOkay = (widthOkay && heightOkay && textureFormat == format && textureType == type);

    if (!textureOkay || forceRedefine || mSurface)   // Purge all the levels and the texture.
    {
        for (int i = 0; i < IMPLEMENTATION_MAX_TEXTURE_LEVELS; i++)
        {
            if (mImageArray[i].surface != NULL)
            {
                mImageArray[i].surface->Release();
                mImageArray[i].surface = NULL;
                mImageArray[i].dirty = true;
            }
        }

        if (mTexture != NULL)
        {
            mTexture->Release();
            mTexture = NULL;
            mDirtyImage = true;
            mIsRenderable = false;
        }

        if (mSurface)
        {
            mSurface->setBoundTexture(NULL);
            mSurface = NULL;
        }
    }
}

void Texture2D::setImage(GLint level, GLsizei width, GLsizei height, GLenum format, GLenum type, GLint unpackAlignment, const void *pixels)
{
    redefineTexture(level, format, width, height, type, false);

    Texture::setImage(unpackAlignment, pixels, &mImageArray[level]);
}

void Texture2D::bindTexImage(egl::Surface *surface)
{
    GLenum format;

    switch(surface->getFormat())
    {
      case D3DFMT_A8R8G8B8:
        format = GL_RGBA;
        break;
      case D3DFMT_X8R8G8B8:
        format = GL_RGB;
        break;
      default:
        UNIMPLEMENTED();
        return;
    }

    redefineTexture(0, format, surface->getWidth(), surface->getHeight(), GL_UNSIGNED_BYTE, true);

    IDirect3DTexture9 *texture = surface->getOffscreenTexture();

    mTexture = texture;
    mDirtyImage = true;
    mIsRenderable = true;
    mSurface = surface;
    mSurface->setBoundTexture(this);
}

void Texture2D::releaseTexImage()
{
    redefineTexture(0, GL_RGB, 0, 0, GL_UNSIGNED_BYTE, true);
}

void Texture2D::setCompressedImage(GLint level, GLenum format, GLsizei width, GLsizei height, GLsizei imageSize, const void *pixels)
{
    redefineTexture(level, format, width, height, GL_UNSIGNED_BYTE, false);

    Texture::setCompressedImage(imageSize, pixels, &mImageArray[level]);
}

void Texture2D::commitRect(GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height)
{
    ASSERT(mImageArray[level].surface != NULL);

    if (level < levelCount())
    {
        IDirect3DSurface9 *destLevel = NULL;
        HRESULT result = mTexture->GetSurfaceLevel(level, &destLevel);

        ASSERT(SUCCEEDED(result));

        if (SUCCEEDED(result))
        {
            Image *image = &mImageArray[level];

            RECT sourceRect = transformPixelRect(xoffset, yoffset, width, height, image->height);;

            POINT destPoint;
            destPoint.x = sourceRect.left;
            destPoint.y = sourceRect.top;

            result = getDevice()->UpdateSurface(image->surface, &sourceRect, destLevel, &destPoint);
            ASSERT(SUCCEEDED(result));

            destLevel->Release();

            image->dirty = false;
        }
    }
}

void Texture2D::subImage(GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, GLint unpackAlignment, const void *pixels)
{
    if (Texture::subImage(xoffset, yoffset, width, height, format, type, unpackAlignment, pixels, &mImageArray[level]))
    {
        commitRect(level, xoffset, yoffset, width, height);
    }
}

void Texture2D::subImageCompressed(GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLsizei imageSize, const void *pixels)
{
    if (Texture::subImageCompressed(xoffset, yoffset, width, height, format, imageSize, pixels, &mImageArray[level]))
    {
        commitRect(level, xoffset, yoffset, width, height);
    }
}

void Texture2D::copyImage(GLint level, GLenum format, GLint x, GLint y, GLsizei width, GLsizei height, Framebuffer *source)
{
    IDirect3DSurface9 *renderTarget = source->getRenderTarget();

    if (!renderTarget)
    {
        ERR("Failed to retrieve the render target.");
        return error(GL_OUT_OF_MEMORY);
    }

    redefineTexture(level, format, width, height, GL_UNSIGNED_BYTE, false);
   
    if (!mImageArray[level].isRenderable())
    {
        copyToImage(&mImageArray[level], 0, 0, x, y, width, height, renderTarget);
    }
    else
    {
        if (!mTexture || !mIsRenderable)
        {
            convertToRenderTarget();
        }
        
        updateTexture();

        if (width != 0 && height != 0 && level < levelCount())
        {
            RECT sourceRect = transformPixelRect(x, y, width, height, source->getColorbuffer()->getHeight());
            sourceRect.left = clamp(sourceRect.left, 0, source->getColorbuffer()->getWidth());
            sourceRect.top = clamp(sourceRect.top, 0, source->getColorbuffer()->getHeight());
            sourceRect.right = clamp(sourceRect.right, 0, source->getColorbuffer()->getWidth());
            sourceRect.bottom = clamp(sourceRect.bottom, 0, source->getColorbuffer()->getHeight());

            GLint destYOffset = transformPixelYOffset(0, height, mImageArray[level].height);
            
            IDirect3DSurface9 *dest;
            HRESULT hr = mTexture->GetSurfaceLevel(level, &dest);

            getBlitter()->copy(source->getRenderTarget(), sourceRect, format, 0, destYOffset, dest);
            dest->Release();
        }
    }
}

void Texture2D::copySubImage(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height, Framebuffer *source)
{
    if (xoffset + width > mImageArray[level].width || yoffset + height > mImageArray[level].height)
    {
        return error(GL_INVALID_VALUE);
    }

    IDirect3DSurface9 *renderTarget = source->getRenderTarget();

    if (!renderTarget)
    {
        ERR("Failed to retrieve the render target.");
        return error(GL_OUT_OF_MEMORY);
    }

    redefineTexture(level, mImageArray[level].format, mImageArray[level].width, mImageArray[level].height, GL_UNSIGNED_BYTE, false);
   
    if (!mImageArray[level].isRenderable() || (!mTexture && !isComplete()))
    {
        copyToImage(&mImageArray[level], xoffset, yoffset, x, y, width, height, renderTarget);
    }
    else
    {
        if (!mTexture || !mIsRenderable)
        {
            convertToRenderTarget();
        }
        
        updateTexture();

        if (level < levelCount())
        {
            RECT sourceRect = transformPixelRect(x, y, width, height, source->getColorbuffer()->getHeight());
            sourceRect.left = clamp(sourceRect.left, 0, source->getColorbuffer()->getWidth());
            sourceRect.top = clamp(sourceRect.top, 0, source->getColorbuffer()->getHeight());
            sourceRect.right = clamp(sourceRect.right, 0, source->getColorbuffer()->getWidth());
            sourceRect.bottom = clamp(sourceRect.bottom, 0, source->getColorbuffer()->getHeight());

            GLint destYOffset = transformPixelYOffset(yoffset, height, mImageArray[level].height);

            IDirect3DSurface9 *dest;
            HRESULT hr = mTexture->GetSurfaceLevel(level, &dest);

            getBlitter()->copy(source->getRenderTarget(), sourceRect, mImageArray[0].format, xoffset, destYOffset, dest);
            dest->Release();
        }
    }
}

// Tests for GL texture object completeness. [OpenGL ES 2.0.24] section 3.7.10 page 81.
bool Texture2D::isComplete() const
{
    GLsizei width = mImageArray[0].width;
    GLsizei height = mImageArray[0].height;

    if (width <= 0 || height <= 0)
    {
        return false;
    }

    bool mipmapping = false;

    switch (mMinFilter)
    {
      case GL_NEAREST:
      case GL_LINEAR:
        mipmapping = false;
        break;
      case GL_NEAREST_MIPMAP_NEAREST:
      case GL_LINEAR_MIPMAP_NEAREST:
      case GL_NEAREST_MIPMAP_LINEAR:
      case GL_LINEAR_MIPMAP_LINEAR:
        mipmapping = true;
        break;
     default: UNREACHABLE();
    }

    if ((getInternalFormat() == GL_FLOAT && !getContext()->supportsFloatLinearFilter()) ||
        (getInternalFormat() == GL_HALF_FLOAT_OES && !getContext()->supportsHalfFloatLinearFilter()))
    {
        if (mMagFilter != GL_NEAREST || (mMinFilter != GL_NEAREST && mMinFilter != GL_NEAREST_MIPMAP_NEAREST))
        {
            return false;
        }
    }

    if ((getWrapS() != GL_CLAMP_TO_EDGE && !isPow2(width))
        || (getWrapT() != GL_CLAMP_TO_EDGE && !isPow2(height)))
    {
        return false;
    }

    if (mipmapping)
    {
        if (!isPow2(width) || !isPow2(height))
        {
            return false;
        }

        int q = log2(std::max(width, height));

        for (int level = 1; level <= q; level++)
        {
            if (mImageArray[level].format != mImageArray[0].format)
            {
                return false;
            }

            if (mImageArray[level].type != mImageArray[0].type)
            {
                return false;
            }

            if (mImageArray[level].width != std::max(1, width >> level))
            {
                return false;
            }

            if (mImageArray[level].height != std::max(1, height >> level))
            {
                return false;
            }
        }
    }

    return true;
}

bool Texture2D::isCompressed() const
{
    return IsCompressed(getInternalFormat());
}

IDirect3DBaseTexture9 *Texture2D::getBaseTexture() const
{
    return mTexture;
}

// Constructs a Direct3D 9 texture resource from the texture images
void Texture2D::createTexture()
{
    IDirect3DDevice9 *device = getDevice();
    D3DFORMAT format = mImageArray[0].getD3DFormat();
    GLint levels = creationLevels(mImageArray[0].width, mImageArray[0].height, 0);

    IDirect3DTexture9 *texture = NULL;
    HRESULT result = device->CreateTexture(mImageArray[0].width, mImageArray[0].height, levels, 0, format, D3DPOOL_DEFAULT, &texture, NULL);

    if (FAILED(result))
    {
        ASSERT(result == D3DERR_OUTOFVIDEOMEMORY || result == E_OUTOFMEMORY);
        return error(GL_OUT_OF_MEMORY);
    }

    if (mTexture)
    {
        mTexture->Release();
    }

    mTexture = texture;
    mDirtyImage = true;
    mIsRenderable = false;
}

void Texture2D::updateTexture()
{
    IDirect3DDevice9 *device = getDevice();

    int levels = levelCount();

    for (int level = 0; level < levels; level++)
    {
        if (mImageArray[level].surface && mImageArray[level].dirty)
        {
            IDirect3DSurface9 *levelSurface = NULL;
            HRESULT result = mTexture->GetSurfaceLevel(level, &levelSurface);

            ASSERT(SUCCEEDED(result));

            if (SUCCEEDED(result))
            {
                result = device->UpdateSurface(mImageArray[level].surface, NULL, levelSurface, NULL);
                ASSERT(SUCCEEDED(result));

                levelSurface->Release();

                mImageArray[level].dirty = false;
            }
        }
    }
}

void Texture2D::convertToRenderTarget()
{
    IDirect3DTexture9 *texture = NULL;

    if (mImageArray[0].width != 0 && mImageArray[0].height != 0)
    {
        egl::Display *display = getDisplay();
        IDirect3DDevice9 *device = getDevice();
        D3DFORMAT format = mImageArray[0].getD3DFormat();
        GLint levels = creationLevels(mImageArray[0].width, mImageArray[0].height, 0);

        HRESULT result = device->CreateTexture(mImageArray[0].width, mImageArray[0].height, levels, D3DUSAGE_RENDERTARGET, format, D3DPOOL_DEFAULT, &texture, NULL);

        if (FAILED(result))
        {
            ASSERT(result == D3DERR_OUTOFVIDEOMEMORY || result == E_OUTOFMEMORY);
            return error(GL_OUT_OF_MEMORY);
        }

        if (mTexture != NULL)
        {
            int levels = levelCount();
            for (int i = 0; i < levels; i++)
            {
                IDirect3DSurface9 *source;
                result = mTexture->GetSurfaceLevel(i, &source);

                if (FAILED(result))
                {
                    ASSERT(result == D3DERR_OUTOFVIDEOMEMORY || result == E_OUTOFMEMORY);

                    texture->Release();

                    return error(GL_OUT_OF_MEMORY);
                }

                IDirect3DSurface9 *dest;
                result = texture->GetSurfaceLevel(i, &dest);

                if (FAILED(result))
                {
                    ASSERT(result == D3DERR_OUTOFVIDEOMEMORY || result == E_OUTOFMEMORY);

                    texture->Release();
                    source->Release();

                    return error(GL_OUT_OF_MEMORY);
                }

                display->endScene();
                result = device->StretchRect(source, NULL, dest, NULL, D3DTEXF_NONE);

                if (FAILED(result))
                {
                    ASSERT(result == D3DERR_OUTOFVIDEOMEMORY || result == E_OUTOFMEMORY);

                    texture->Release();
                    source->Release();
                    dest->Release();

                    return error(GL_OUT_OF_MEMORY);
                }

                source->Release();
                dest->Release();
            }
        }
    }

    if (mTexture != NULL)
    {
        mTexture->Release();
    }

    mTexture = texture;
    mDirtyImage = true;
    mIsRenderable = true;
}

void Texture2D::generateMipmaps()
{
    if (!isPow2(mImageArray[0].width) || !isPow2(mImageArray[0].height))
    {
        return error(GL_INVALID_OPERATION);
    }

    // Purge array levels 1 through q and reset them to represent the generated mipmap levels.
    unsigned int q = log2(std::max(mImageArray[0].width, mImageArray[0].height));
    for (unsigned int i = 1; i <= q; i++)
    {
        if (mImageArray[i].surface != NULL)
        {
            mImageArray[i].surface->Release();
            mImageArray[i].surface = NULL;
        }

        mImageArray[i].width = std::max(mImageArray[0].width >> i, 1);
        mImageArray[i].height = std::max(mImageArray[0].height >> i, 1);
        mImageArray[i].format = mImageArray[0].format;
        mImageArray[i].type = mImageArray[0].type;
    }

    if (mIsRenderable)
    {
        if (mTexture == NULL)
        {
            ERR(" failed because mTexture was null.");
            return;
        }

        for (unsigned int i = 1; i <= q; i++)
        {
            IDirect3DSurface9 *upper = NULL;
            IDirect3DSurface9 *lower = NULL;

            mTexture->GetSurfaceLevel(i-1, &upper);
            mTexture->GetSurfaceLevel(i, &lower);

            if (upper != NULL && lower != NULL)
            {
                getBlitter()->boxFilter(upper, lower);
            }

            if (upper != NULL) upper->Release();
            if (lower != NULL) lower->Release();

            mImageArray[i].dirty = false;
        }
    }
    else
    {
        for (unsigned int i = 1; i <= q; i++)
        {
            createSurface(&mImageArray[i]);
            
            if (mImageArray[i].surface == NULL)
            {
                return error(GL_OUT_OF_MEMORY);
            }

            if (FAILED(D3DXLoadSurfaceFromSurface(mImageArray[i].surface, NULL, NULL, mImageArray[i - 1].surface, NULL, NULL, D3DX_FILTER_BOX, 0)))
            {
                ERR(" failed to load filter %d to %d.", i - 1, i);
            }

            mImageArray[i].dirty = true;
        }
    }
}

Renderbuffer *Texture2D::getRenderbuffer(GLenum target)
{
    if (target != GL_TEXTURE_2D)
    {
        return error(GL_INVALID_OPERATION, (Renderbuffer *)NULL);
    }

    if (mColorbufferProxy.get() == NULL)
    {
        mColorbufferProxy.set(new Renderbuffer(id(), new Colorbuffer(this, target)));
    }

    return mColorbufferProxy.get();
}

IDirect3DSurface9 *Texture2D::getRenderTarget(GLenum target)
{
    ASSERT(target == GL_TEXTURE_2D);

    if (!mIsRenderable)
    {
        convertToRenderTarget();
    }

    if (mTexture == NULL)
    {
        return NULL;
    }

    updateTexture();
    
    IDirect3DSurface9 *renderTarget = NULL;
    mTexture->GetSurfaceLevel(0, &renderTarget);

    return renderTarget;
}

TextureCubeMap::TextureCubeMap(GLuint id) : Texture(id)
{
    mTexture = NULL;
}

TextureCubeMap::~TextureCubeMap()
{
    for (int i = 0; i < 6; i++)
    {
        mFaceProxies[i].set(NULL);
    }

    if (mTexture)
    {
        mTexture->Release();
        mTexture = NULL;
    }
}

GLenum TextureCubeMap::getTarget() const
{
    return GL_TEXTURE_CUBE_MAP;
}

GLsizei TextureCubeMap::getWidth() const
{
    return mImageArray[0][0].width;
}

GLsizei TextureCubeMap::getHeight() const
{
    return mImageArray[0][0].height;
}

GLenum TextureCubeMap::getInternalFormat() const
{
    return mImageArray[0][0].format;
}

GLenum TextureCubeMap::getType() const
{
    return mImageArray[0][0].type;
}

D3DFORMAT TextureCubeMap::getD3DFormat() const
{
    return mImageArray[0][0].getD3DFormat();
}

void TextureCubeMap::setImagePosX(GLint level, GLsizei width, GLsizei height, GLenum format, GLenum type, GLint unpackAlignment, const void *pixels)
{
    setImage(0, level, width, height, format, type, unpackAlignment, pixels);
}

void TextureCubeMap::setImageNegX(GLint level, GLsizei width, GLsizei height, GLenum format, GLenum type, GLint unpackAlignment, const void *pixels)
{
    setImage(1, level, width, height, format, type, unpackAlignment, pixels);
}

void TextureCubeMap::setImagePosY(GLint level, GLsizei width, GLsizei height, GLenum format, GLenum type, GLint unpackAlignment, const void *pixels)
{
    setImage(2, level, width, height, format, type, unpackAlignment, pixels);
}

void TextureCubeMap::setImageNegY(GLint level, GLsizei width, GLsizei height, GLenum format, GLenum type, GLint unpackAlignment, const void *pixels)
{
    setImage(3, level, width, height, format, type, unpackAlignment, pixels);
}

void TextureCubeMap::setImagePosZ(GLint level, GLsizei width, GLsizei height, GLenum format, GLenum type, GLint unpackAlignment, const void *pixels)
{
    setImage(4, level, width, height, format, type, unpackAlignment, pixels);
}

void TextureCubeMap::setImageNegZ(GLint level, GLsizei width, GLsizei height, GLenum format, GLenum type, GLint unpackAlignment, const void *pixels)
{
    setImage(5, level, width, height, format, type, unpackAlignment, pixels);
}

void TextureCubeMap::setCompressedImage(GLenum face, GLint level, GLenum format, GLsizei width, GLsizei height, GLsizei imageSize, const void *pixels)
{
    redefineTexture(faceIndex(face), level, format, width, height, GL_UNSIGNED_BYTE);

    Texture::setCompressedImage(imageSize, pixels, &mImageArray[faceIndex(face)][level]);
}

void TextureCubeMap::commitRect(GLenum faceTarget, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height)
{
    int face = faceIndex(faceTarget);
    ASSERT(mImageArray[face][level].surface != NULL);

    if (level < levelCount())
    {
        IDirect3DSurface9 *destLevel = getCubeMapSurface(faceTarget, level);
        ASSERT(destLevel != NULL);

        if (destLevel != NULL)
        {
            Image *image = &mImageArray[face][level];

            RECT sourceRect = transformPixelRect(xoffset, yoffset, width, height, image->height);;

            POINT destPoint;
            destPoint.x = sourceRect.left;
            destPoint.y = sourceRect.top;

            HRESULT result = getDevice()->UpdateSurface(image->surface, &sourceRect, destLevel, &destPoint);
            ASSERT(SUCCEEDED(result));

            destLevel->Release();

            image->dirty = false;
        }
    }
}

void TextureCubeMap::subImage(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, GLint unpackAlignment, const void *pixels)
{
    if (Texture::subImage(xoffset, yoffset, width, height, format, type, unpackAlignment, pixels, &mImageArray[faceIndex(target)][level]))
    {
        commitRect(target, level, xoffset, yoffset, width, height);
    }
}

void TextureCubeMap::subImageCompressed(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLsizei imageSize, const void *pixels)
{
    if (Texture::subImageCompressed(xoffset, yoffset, width, height, format, imageSize, pixels, &mImageArray[faceIndex(target)][level]))
    {
        commitRect(target, level, xoffset, yoffset, width, height);
    }
}

// Tests for GL texture object completeness. [OpenGL ES 2.0.24] section 3.7.10 page 81.
bool TextureCubeMap::isComplete() const
{
    int size = mImageArray[0][0].width;

    if (size <= 0)
    {
        return false;
    }

    bool mipmapping;

    switch (mMinFilter)
    {
      case GL_NEAREST:
      case GL_LINEAR:
        mipmapping = false;
        break;
      case GL_NEAREST_MIPMAP_NEAREST:
      case GL_LINEAR_MIPMAP_NEAREST:
      case GL_NEAREST_MIPMAP_LINEAR:
      case GL_LINEAR_MIPMAP_LINEAR:
        mipmapping = true;
        break;
      default: UNREACHABLE();
    }

    for (int face = 0; face < 6; face++)
    {
        if (mImageArray[face][0].width != size || mImageArray[face][0].height != size)
        {
            return false;
        }
    }

    if ((getInternalFormat() == GL_FLOAT && !getContext()->supportsFloatLinearFilter()) ||
        (getInternalFormat() == GL_HALF_FLOAT_OES && !getContext()->supportsHalfFloatLinearFilter()))
    {
        if (mMagFilter != GL_NEAREST || (mMinFilter != GL_NEAREST && mMinFilter != GL_NEAREST_MIPMAP_NEAREST))
        {
            return false;
        }
    }

    if (mipmapping)
    {
        if (!isPow2(size) && (getWrapS() != GL_CLAMP_TO_EDGE || getWrapT() != GL_CLAMP_TO_EDGE))
        {
            return false;
        }

        int q = log2(size);

        for (int face = 0; face < 6; face++)
        {
            for (int level = 1; level <= q; level++)
            {
                if (mImageArray[face][level].format != mImageArray[0][0].format)
                {
                    return false;
                }

                if (mImageArray[face][level].type != mImageArray[0][0].type)
                {
                    return false;
                }

                if (mImageArray[face][level].width != std::max(1, size >> level))
                {
                    return false;
                }

                ASSERT(mImageArray[face][level].height == mImageArray[face][level].width);
            }
        }
    }

    return true;
}

bool TextureCubeMap::isCompressed() const
{
    return IsCompressed(getInternalFormat());
}

IDirect3DBaseTexture9 *TextureCubeMap::getBaseTexture() const
{
    return mTexture;
}

// Constructs a Direct3D 9 texture resource from the texture images, or returns an existing one
void TextureCubeMap::createTexture()
{
    IDirect3DDevice9 *device = getDevice();
    D3DFORMAT format = mImageArray[0][0].getD3DFormat();
    GLint levels = creationLevels(mImageArray[0][0].width, 0);

    IDirect3DCubeTexture9 *texture = NULL;
    HRESULT result = device->CreateCubeTexture(mImageArray[0][0].width, levels, 0, format, D3DPOOL_DEFAULT, &texture, NULL);

    if (FAILED(result))
    {
        ASSERT(result == D3DERR_OUTOFVIDEOMEMORY || result == E_OUTOFMEMORY);
        return error(GL_OUT_OF_MEMORY);
    }

    if (mTexture)
    {
        mTexture->Release();
    }

    mTexture = texture;
    mDirtyImage = true;
    mIsRenderable = false;
}

void TextureCubeMap::updateTexture()
{
    IDirect3DDevice9 *device = getDevice();

    for (int face = 0; face < 6; face++)
    {
        int levels = levelCount();
        for (int level = 0; level < levels; level++)
        {
            Image *image = &mImageArray[face][level];

            if (image->surface && image->dirty)
            {
                IDirect3DSurface9 *levelSurface = getCubeMapSurface(GL_TEXTURE_CUBE_MAP_POSITIVE_X + face, level);
                ASSERT(levelSurface != NULL);

                if (levelSurface != NULL)
                {
                    HRESULT result = device->UpdateSurface(image->surface, NULL, levelSurface, NULL);
                    ASSERT(SUCCEEDED(result));

                    levelSurface->Release();

                    image->dirty = false;
                }
            }
        }
    }
}

void TextureCubeMap::convertToRenderTarget()
{
    IDirect3DCubeTexture9 *texture = NULL;

    if (mImageArray[0][0].width != 0)
    {
        egl::Display *display = getDisplay();
        IDirect3DDevice9 *device = getDevice();
        D3DFORMAT format = mImageArray[0][0].getD3DFormat();
        GLint levels = creationLevels(mImageArray[0][0].width, 0);

        HRESULT result = device->CreateCubeTexture(mImageArray[0][0].width, levels, D3DUSAGE_RENDERTARGET, format, D3DPOOL_DEFAULT, &texture, NULL);

        if (FAILED(result))
        {
            ASSERT(result == D3DERR_OUTOFVIDEOMEMORY || result == E_OUTOFMEMORY);
            return error(GL_OUT_OF_MEMORY);
        }

        if (mTexture != NULL)
        {
            int levels = levelCount();
            for (int f = 0; f < 6; f++)
            {
                for (int i = 0; i < levels; i++)
                {
                    IDirect3DSurface9 *source;
                    result = mTexture->GetCubeMapSurface(static_cast<D3DCUBEMAP_FACES>(f), i, &source);

                    if (FAILED(result))
                    {
                        ASSERT(result == D3DERR_OUTOFVIDEOMEMORY || result == E_OUTOFMEMORY);

                        texture->Release();

                        return error(GL_OUT_OF_MEMORY);
                    }

                    IDirect3DSurface9 *dest;
                    result = texture->GetCubeMapSurface(static_cast<D3DCUBEMAP_FACES>(f), i, &dest);

                    if (FAILED(result))
                    {
                        ASSERT(result == D3DERR_OUTOFVIDEOMEMORY || result == E_OUTOFMEMORY);

                        texture->Release();
                        source->Release();

                        return error(GL_OUT_OF_MEMORY);
                    }

                    display->endScene();
                    result = device->StretchRect(source, NULL, dest, NULL, D3DTEXF_NONE);

                    if (FAILED(result))
                    {
                        ASSERT(result == D3DERR_OUTOFVIDEOMEMORY || result == E_OUTOFMEMORY);

                        texture->Release();
                        source->Release();
                        dest->Release();

                        return error(GL_OUT_OF_MEMORY);
                    }
                }
            }
        }
    }

    if (mTexture != NULL)
    {
        mTexture->Release();
    }

    mTexture = texture;
    mDirtyImage = true;
    mIsRenderable = true;
}

void TextureCubeMap::setImage(int faceIndex, GLint level, GLsizei width, GLsizei height, GLenum format, GLenum type, GLint unpackAlignment, const void *pixels)
{
    redefineTexture(faceIndex, level, format, width, height, type);

    Texture::setImage(unpackAlignment, pixels, &mImageArray[faceIndex][level]);
}

unsigned int TextureCubeMap::faceIndex(GLenum face)
{
    META_ASSERT(GL_TEXTURE_CUBE_MAP_NEGATIVE_X - GL_TEXTURE_CUBE_MAP_POSITIVE_X == 1);
    META_ASSERT(GL_TEXTURE_CUBE_MAP_POSITIVE_Y - GL_TEXTURE_CUBE_MAP_POSITIVE_X == 2);
    META_ASSERT(GL_TEXTURE_CUBE_MAP_NEGATIVE_Y - GL_TEXTURE_CUBE_MAP_POSITIVE_X == 3);
    META_ASSERT(GL_TEXTURE_CUBE_MAP_POSITIVE_Z - GL_TEXTURE_CUBE_MAP_POSITIVE_X == 4);
    META_ASSERT(GL_TEXTURE_CUBE_MAP_NEGATIVE_Z - GL_TEXTURE_CUBE_MAP_POSITIVE_X == 5);

    return face - GL_TEXTURE_CUBE_MAP_POSITIVE_X;
}

void TextureCubeMap::redefineTexture(int face, GLint level, GLenum format, GLsizei width, GLsizei height, GLenum type)
{
    GLsizei textureWidth = mImageArray[0][0].width;
    GLsizei textureHeight = mImageArray[0][0].height;
    GLenum textureFormat = mImageArray[0][0].format;
    GLenum textureType = mImageArray[0][0].type;

    mImageArray[face][level].width = width;
    mImageArray[face][level].height = height;
    mImageArray[face][level].format = format;
    mImageArray[face][level].type = type;

    if (!mTexture)
    {
        return;
    }

    bool sizeOkay = (textureWidth >> level == width);
    bool textureOkay = (sizeOkay && textureFormat == format && textureType == type);

    if (!textureOkay)   // Purge all the levels and the texture.
    {
        for (int i = 0; i < IMPLEMENTATION_MAX_TEXTURE_LEVELS; i++)
        {
            for (int f = 0; f < 6; f++)
            {
                if (mImageArray[f][i].surface != NULL)
                {
                    mImageArray[f][i].surface->Release();
                    mImageArray[f][i].surface = NULL;
                    mImageArray[f][i].dirty = true;
                }
            }
        }

        if (mTexture != NULL)
        {
            mTexture->Release();
            mTexture = NULL;
            mDirtyImage = true;
            mIsRenderable = false;
        }
    }
}

void TextureCubeMap::copyImage(GLenum target, GLint level, GLenum format, GLint x, GLint y, GLsizei width, GLsizei height, Framebuffer *source)
{
    IDirect3DSurface9 *renderTarget = source->getRenderTarget();

    if (!renderTarget)
    {
        ERR("Failed to retrieve the render target.");
        return error(GL_OUT_OF_MEMORY);
    }

    unsigned int faceindex = faceIndex(target);
    redefineTexture(faceindex, level, format, width, height, GL_UNSIGNED_BYTE);

    if (!mImageArray[faceindex][level].isRenderable())
    {
        copyToImage(&mImageArray[faceindex][level], 0, 0, x, y, width, height, renderTarget);
    }
    else
    {
        if (!mTexture || !mIsRenderable)
        {
            convertToRenderTarget();
        }
        
        updateTexture();

        ASSERT(width == height);

        if (width > 0 && level < levelCount())
        {
            RECT sourceRect = transformPixelRect(x, y, width, height, source->getColorbuffer()->getHeight());
            sourceRect.left = clamp(sourceRect.left, 0, source->getColorbuffer()->getWidth());
            sourceRect.top = clamp(sourceRect.top, 0, source->getColorbuffer()->getHeight());
            sourceRect.right = clamp(sourceRect.right, 0, source->getColorbuffer()->getWidth());
            sourceRect.bottom = clamp(sourceRect.bottom, 0, source->getColorbuffer()->getHeight());

            GLint destYOffset = transformPixelYOffset(0, height, mImageArray[faceindex][level].width);

            IDirect3DSurface9 *dest = getCubeMapSurface(target, level);

            getBlitter()->copy(source->getRenderTarget(), sourceRect, format, 0, destYOffset, dest);
            dest->Release();
        }
    }
}

IDirect3DSurface9 *TextureCubeMap::getCubeMapSurface(GLenum face, unsigned int level)
{
    if (mTexture == NULL)
    {
        UNREACHABLE();
        return NULL;
    }

    IDirect3DSurface9 *surface = NULL;

    HRESULT hr = mTexture->GetCubeMapSurface(es2dx::ConvertCubeFace(face), level, &surface);

    return (SUCCEEDED(hr)) ? surface : NULL;
}

void TextureCubeMap::copySubImage(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height, Framebuffer *source)
{
    GLsizei size = mImageArray[faceIndex(target)][level].width;

    if (xoffset + width > size || yoffset + height > size)
    {
        return error(GL_INVALID_VALUE);
    }

    IDirect3DSurface9 *renderTarget = source->getRenderTarget();

    if (!renderTarget)
    {
        ERR("Failed to retrieve the render target.");
        return error(GL_OUT_OF_MEMORY);
    }

    unsigned int faceindex = faceIndex(target);
    redefineTexture(faceindex, level, mImageArray[faceindex][level].format, mImageArray[faceindex][level].width, mImageArray[faceindex][level].height, GL_UNSIGNED_BYTE);
   
    if (!mImageArray[faceindex][level].isRenderable() || (!mTexture && !isComplete()))
    {
        copyToImage(&mImageArray[faceindex][level], 0, 0, x, y, width, height, renderTarget);
    }
    else
    {
        if (!mTexture || !mIsRenderable)
        {
            convertToRenderTarget();
        }
        
        updateTexture();

        if (level < levelCount())
        {
            RECT sourceRect = transformPixelRect(x, y, width, height, source->getColorbuffer()->getHeight());
            sourceRect.left = clamp(sourceRect.left, 0, source->getColorbuffer()->getWidth());
            sourceRect.top = clamp(sourceRect.top, 0, source->getColorbuffer()->getHeight());
            sourceRect.right = clamp(sourceRect.right, 0, source->getColorbuffer()->getWidth());
            sourceRect.bottom = clamp(sourceRect.bottom, 0, source->getColorbuffer()->getHeight());

            GLint destYOffset = transformPixelYOffset(yoffset, height, mImageArray[faceindex][level].width);

            IDirect3DSurface9 *dest = getCubeMapSurface(target, level);

            getBlitter()->copy(source->getRenderTarget(), sourceRect, mImageArray[0][0].format, xoffset, destYOffset, dest);
            dest->Release();
        }
    }
}

bool TextureCubeMap::isCubeComplete() const
{
    if (mImageArray[0][0].width == 0)
    {
        return false;
    }

    for (unsigned int f = 1; f < 6; f++)
    {
        if (mImageArray[f][0].width != mImageArray[0][0].width
            || mImageArray[f][0].format != mImageArray[0][0].format)
        {
            return false;
        }
    }

    return true;
}

void TextureCubeMap::generateMipmaps()
{
    if (!isPow2(mImageArray[0][0].width) || !isCubeComplete())
    {
        return error(GL_INVALID_OPERATION);
    }

    // Purge array levels 1 through q and reset them to represent the generated mipmap levels.
    unsigned int q = log2(mImageArray[0][0].width);
    for (unsigned int f = 0; f < 6; f++)
    {
        for (unsigned int i = 1; i <= q; i++)
        {
            if (mImageArray[f][i].surface != NULL)
            {
                mImageArray[f][i].surface->Release();
                mImageArray[f][i].surface = NULL;
            }

            mImageArray[f][i].width = std::max(mImageArray[f][0].width >> i, 1);
            mImageArray[f][i].height = mImageArray[f][i].width;
            mImageArray[f][i].format = mImageArray[f][0].format;
            mImageArray[f][i].type = mImageArray[f][0].type;
        }
    }

    if (mIsRenderable)
    {
        if (mTexture == NULL)
        {
            return;
        }

        for (unsigned int f = 0; f < 6; f++)
        {
            for (unsigned int i = 1; i <= q; i++)
            {
                IDirect3DSurface9 *upper = getCubeMapSurface(GL_TEXTURE_CUBE_MAP_POSITIVE_X + f, i-1);
                IDirect3DSurface9 *lower = getCubeMapSurface(GL_TEXTURE_CUBE_MAP_POSITIVE_X + f, i);

                if (upper != NULL && lower != NULL)
                {
                    getBlitter()->boxFilter(upper, lower);
                }

                if (upper != NULL) upper->Release();
                if (lower != NULL) lower->Release();

                mImageArray[f][i].dirty = false;
            }
        }
    }
    else
    {
        for (unsigned int f = 0; f < 6; f++)
        {
            for (unsigned int i = 1; i <= q; i++)
            {
                createSurface(&mImageArray[f][i]);
                if (mImageArray[f][i].surface == NULL)
                {
                    return error(GL_OUT_OF_MEMORY);
                }

                if (FAILED(D3DXLoadSurfaceFromSurface(mImageArray[f][i].surface, NULL, NULL, mImageArray[f][i - 1].surface, NULL, NULL, D3DX_FILTER_BOX, 0)))
                {
                    ERR(" failed to load filter %d to %d.", i - 1, i);
                }

                mImageArray[f][i].dirty = true;
            }
        }
    }
}

Renderbuffer *TextureCubeMap::getRenderbuffer(GLenum target)
{
    if (!IsCubemapTextureTarget(target))
    {
        return error(GL_INVALID_OPERATION, (Renderbuffer *)NULL);
    }

    unsigned int face = faceIndex(target);

    if (mFaceProxies[face].get() == NULL)
    {
        mFaceProxies[face].set(new Renderbuffer(id(), new Colorbuffer(this, target)));
    }

    return mFaceProxies[face].get();
}

IDirect3DSurface9 *TextureCubeMap::getRenderTarget(GLenum target)
{
    ASSERT(IsCubemapTextureTarget(target));

    if (!mIsRenderable)
    {
        convertToRenderTarget();
    }

    if (mTexture == NULL)
    {
        return NULL;
    }

    updateTexture();
    
    IDirect3DSurface9 *renderTarget = NULL;
    mTexture->GetCubeMapSurface(es2dx::ConvertCubeFace(target), 0, &renderTarget);

    return renderTarget;
}

}
kc3-lang/angle/src/libGLESv2/Texture.cpp

Commit

kc3-lang/angle /src/libGLESv2/Texture.cpp
