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annotate src/libraries/ddsparse/ddsparse.cpp @ 1420:2a5ef265e040 image-CompressedData

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Added support for DXT1/3/5 and BC5/7 compressed textures via love.image.CompressedData. Some internals are still iffy. - added a new CompressedData type to love.image - added love.image.isCompressed(file or data) - love.graphics.newImage automatically tests for compression when loading a file - added love.graphics.isSupported strings for DXT, BC5, and BC7 Compressed textures meant to be used on the GPU offer huge performance gains when - loading the texture from a file - loading the texture from RAM to VRAM - loading mipmaps - rendering
author Alex Szpakowski <slime73@gmail.com>
date Thu, 04 Apr 2013 19:09:18 -0300
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children aa603d1b03bc
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rev   line source
1420
2a5ef265e040 Added support for DXT1/3/5 and BC5/7 compressed textures via love.image.CompressedData. Some internals are still iffy.
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1 /**
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2 * Simple DDS data parser for compressed 2D textures.
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3 *
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4 * Copyright (c) 2013 Alexander Szpakowski.
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5 *
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6 * Permission is hereby granted, free of charge, to any person obtaining a copy
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7 * of this software and associated documentation files (the "Software"), to deal
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8 * in the Software without restriction, including without limitation the rights
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9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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10 * copies of the Software, and to permit persons to whom the Software is
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11 * furnished to do so, subject to the following conditions:
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12 *
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13 * The above copyright notice and this permission notice shall be included in
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14 * all copies or substantial portions of the Software.
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15 *
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16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
2a5ef265e040 Added support for DXT1/3/5 and BC5/7 compressed textures via love.image.CompressedData. Some internals are still iffy.
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17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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22 * THE SOFTWARE.
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23 **/
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24
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25 #include "ddsparse.h"
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26 #include "ddsinfo.h"
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27
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28 #include <algorithm>
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29
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30 namespace dds
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31 {
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32
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33 using namespace dds::dxinfo;
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34
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35 // Creates a packed uint representation of a FourCC code.
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36 static inline uint32_t FourCC(char a, char b, char c, char d)
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37 {
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38 uint32_t fcc = ((uint32_t) a)
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39 | (((uint32_t) b) << 8)
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40 | (((uint32_t) c) << 16)
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41 | (((uint32_t) d) << 24);
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42
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43 return fcc;
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44 }
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45
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46 Parser::Image::Image()
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47 : width(0)
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48 , height(0)
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49 , dataSize(0)
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50 , data(0)
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51 {
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52 }
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53
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54 bool Parser::isDDS(const void *data, size_t dataSize)
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55 {
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56 const uint8_t *readData = (const uint8_t *) data;
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57 ptrdiff_t offset = 0;
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58
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59 // Is the data large enough to hold the DDS header?
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60 if(dataSize < sizeof(uint32_t) + sizeof(DDSHeader))
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61 return false;
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62
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63 // All DDS files start with "DDS ".
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64 if((*(uint32_t *) readData) != FourCC('D','D','S',' '))
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65 return false;
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66
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67 offset += sizeof(uint32_t);
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68
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69 DDSHeader *header = (DDSHeader *) &readData[offset];
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71
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72 // Verify header to validate DDS data.
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73 if (header->size != sizeof(DDSHeader) || header->format.size != sizeof(DDSPixelFormat))
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74 return false;
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75
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76 offset += sizeof(DDSHeader);
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77
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78 // Check for DX10 extension.
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79 if ((header->format.flags & DDPF_FOURCC) && (header->format.fourCC == FourCC('D','X','1','0')))
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80 {
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81 // Data must be big enough for both headers plus the magic value.
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82 if (dataSize < (sizeof(uint32_t) + sizeof(DDSHeader) + sizeof(DDSHeader10)))
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83 return false;
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84
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85 }
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86
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87 return true;
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88 }
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89
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90 Parser::Parser(const void *data, size_t dataSize, Options opts)
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91 : format(FORMAT_UNKNOWN)
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92 , options(opts)
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93 {
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94 parseData(data, dataSize);
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95 }
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96
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97 Parser::Parser(const Parser &other)
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98 : format(other.format)
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99 , options(other.options)
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100 {
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101 std::vector<Image>::const_iterator it;
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102 for (it = other.texData.begin(); it != other.texData.end(); ++it)
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103 {
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104 Image img = *it;
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105
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106 if ((options & OPTIONS_COPY_DATA) && img.dataSize > 0)
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107 {
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108 uint8_t *data = 0;
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109
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110 try
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111 {
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112 data = new uint8_t[img.dataSize];
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113 }
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114 catch (std::exception &)
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115 {
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116 clearData();
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117 throw;
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118 }
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119
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120 img.data = data;
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121 }
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122
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123 texData.push_back(img);
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124 }
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125 }
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126
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127 Parser::~Parser()
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128 {
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129 // Delete any data we created.
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130 clearData();
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131 }
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132
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133 Format Parser::getFormat() const
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134 {
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135 return format;
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136 }
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137
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138 const Parser::Image *Parser::getImageData(size_t miplevel) const
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139 {
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140 if (miplevel >= texData.size())
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141 return 0;
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142
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143 return &texData[miplevel];
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144 }
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145
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146 size_t Parser::getNumMipmaps() const
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147 {
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148 return texData.size();
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149 }
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150
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151 bool Parser::ownsData() const
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152 {
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153 return (options & OPTIONS_COPY_DATA) != 0;
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154 }
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155
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156 Format Parser::parseDDSFormat(const DDSPixelFormat &fmt) const
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157 {
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158 if (fmt.flags & DDPF_FOURCC)
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159 {
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160 if (fmt.fourCC == FourCC('D','X','T','1'))
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161 return FORMAT_DXT1;
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162 else if (fmt.fourCC == FourCC('D','X','T','3'))
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163 return FORMAT_DXT3;
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164 else if (fmt.fourCC == FourCC('D','X','T','5'))
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165 return FORMAT_DXT5;
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166 else if (fmt.fourCC == FourCC('A','T','I','2'))
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167 return FORMAT_BC5u;
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168 }
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169
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170 return FORMAT_UNKNOWN;
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171 }
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172
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173 Format Parser::parseDX10Format(DXGIFormat fmt) const
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174 {
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175 Format f = FORMAT_UNKNOWN;
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176
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177 switch (fmt)
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178 {
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179 case DXGI_FORMAT_BC1_TYPELESS:
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180 case DXGI_FORMAT_BC1_UNORM:
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181 case DXGI_FORMAT_BC1_UNORM_SRGB:
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182 f = FORMAT_DXT1;
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183 break;
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184 case DXGI_FORMAT_BC2_TYPELESS:
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185 case DXGI_FORMAT_BC2_UNORM:
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186 case DXGI_FORMAT_BC2_UNORM_SRGB:
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187 f = FORMAT_DXT3;
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188 break;
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189 case DXGI_FORMAT_BC3_TYPELESS:
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190 case DXGI_FORMAT_BC3_UNORM:
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191 case DXGI_FORMAT_BC3_UNORM_SRGB:
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192 f = FORMAT_DXT5;
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193 break;
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194 case DXGI_FORMAT_BC5_SNORM:
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195 f = FORMAT_BC5s;
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196 break;
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197 case DXGI_FORMAT_BC5_TYPELESS:
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198 case DXGI_FORMAT_BC5_UNORM:
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199 f = FORMAT_BC5u;
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200 break;
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201 case DXGI_FORMAT_BC7_TYPELESS:
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202 case DXGI_FORMAT_BC7_UNORM:
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203 f = FORMAT_BC7;
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204 break;
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205 case DXGI_FORMAT_BC7_UNORM_SRGB:
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206 f = FORMAT_BC7srgb;
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207 default:
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parents:
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208 break;
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209 }
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210
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211 return f;
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212 }
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213
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214 size_t Parser::parseImageSize(Format fmt, int width, int height) const
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215 {
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216 size_t size = 0;
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217
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218 switch (fmt)
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219 {
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220 case FORMAT_DXT1:
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Alex Szpakowski <slime73@gmail.com>
parents:
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221 case FORMAT_DXT3:
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Alex Szpakowski <slime73@gmail.com>
parents:
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222 case FORMAT_DXT5:
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Alex Szpakowski <slime73@gmail.com>
parents:
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223 case FORMAT_BC5s:
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Alex Szpakowski <slime73@gmail.com>
parents:
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224 case FORMAT_BC5u:
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Alex Szpakowski <slime73@gmail.com>
parents:
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225 case FORMAT_BC7:
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Alex Szpakowski <slime73@gmail.com>
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226 case FORMAT_BC7srgb:
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Alex Szpakowski <slime73@gmail.com>
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227 {
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228 int numBlocksWide = 0;
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229 if (width > 0)
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230 numBlocksWide = std::max(1, (width + 3) / 4);
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231
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232 int numBlocksHigh = 0;
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233 if (height > 0)
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234 numBlocksHigh = std::max(1, (height + 3) / 4);
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235
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236 int numBytesPerBlock = (fmt == FORMAT_DXT1 ? 8 : 16);
2a5ef265e040 Added support for DXT1/3/5 and BC5/7 compressed textures via love.image.CompressedData. Some internals are still iffy.
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237
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238 size = numBlocksWide * numBytesPerBlock * numBlocksHigh;
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239 }
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240 break;
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Alex Szpakowski <slime73@gmail.com>
parents:
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241 default:
2a5ef265e040 Added support for DXT1/3/5 and BC5/7 compressed textures via love.image.CompressedData. Some internals are still iffy.
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parents:
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242 break;
2a5ef265e040 Added support for DXT1/3/5 and BC5/7 compressed textures via love.image.CompressedData. Some internals are still iffy.
Alex Szpakowski <slime73@gmail.com>
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243 }
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244
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245 return size;
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246 }
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247
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248 bool Parser::parseTexData(const uint8_t *data, size_t dataSize, Format fmt, int w, int h, int mips)
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249 {
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250 size_t offset = 0;
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251
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252 for (int i = 0; i < mips; i++)
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253 {
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254 Image img;
2a5ef265e040 Added support for DXT1/3/5 and BC5/7 compressed textures via love.image.CompressedData. Some internals are still iffy.
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255 img.width = w;
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diff changeset
256 img.height = h;
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257
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258 img.dataSize = parseImageSize(fmt, img.width, img.height);
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259
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260 // Make sure the data size is valid.
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diff changeset
261 if (img.dataSize == 0 || (offset + img.dataSize) > dataSize)
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parents:
diff changeset
262 {
2a5ef265e040 Added support for DXT1/3/5 and BC5/7 compressed textures via love.image.CompressedData. Some internals are still iffy.
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parents:
diff changeset
263 // Clean up any data we allocated previously.
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Alex Szpakowski <slime73@gmail.com>
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diff changeset
264 clearData();
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Alex Szpakowski <slime73@gmail.com>
parents:
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265 return false;
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parents:
diff changeset
266 }
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parents:
diff changeset
267
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diff changeset
268 // Create our own copy of the data, if requested.
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diff changeset
269 if (options & OPTIONS_COPY_DATA)
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parents:
diff changeset
270 {
2a5ef265e040 Added support for DXT1/3/5 and BC5/7 compressed textures via love.image.CompressedData. Some internals are still iffy.
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diff changeset
271 uint8_t *newData = 0;
2a5ef265e040 Added support for DXT1/3/5 and BC5/7 compressed textures via love.image.CompressedData. Some internals are still iffy.
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parents:
diff changeset
272
2a5ef265e040 Added support for DXT1/3/5 and BC5/7 compressed textures via love.image.CompressedData. Some internals are still iffy.
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parents:
diff changeset
273 try
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Alex Szpakowski <slime73@gmail.com>
parents:
diff changeset
274 {
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diff changeset
275 newData = new uint8_t[img.dataSize];
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parents:
diff changeset
276 }
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parents:
diff changeset
277 catch (std::exception &)
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parents:
diff changeset
278 {
2a5ef265e040 Added support for DXT1/3/5 and BC5/7 compressed textures via love.image.CompressedData. Some internals are still iffy.
Alex Szpakowski <slime73@gmail.com>
parents:
diff changeset
279 // Clean up before throwing.
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Alex Szpakowski <slime73@gmail.com>
parents:
diff changeset
280 clearData();
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parents:
diff changeset
281 throw;
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parents:
diff changeset
282 }
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Alex Szpakowski <slime73@gmail.com>
parents:
diff changeset
283
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parents:
diff changeset
284 memcpy(newData, &data[offset], img.dataSize);
2a5ef265e040 Added support for DXT1/3/5 and BC5/7 compressed textures via love.image.CompressedData. Some internals are still iffy.
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parents:
diff changeset
285 img.data = newData;
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parents:
diff changeset
286 }
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parents:
diff changeset
287 else
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diff changeset
288 img.data = &data[offset];
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parents:
diff changeset
289
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diff changeset
290 texData.push_back(img);
2a5ef265e040 Added support for DXT1/3/5 and BC5/7 compressed textures via love.image.CompressedData. Some internals are still iffy.
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parents:
diff changeset
291
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parents:
diff changeset
292 // Move to the next mip level.
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parents:
diff changeset
293 offset += img.dataSize;
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parents:
diff changeset
294
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diff changeset
295 w = std::max(w / 2, 1);
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diff changeset
296 h = std::max(h / 2, 1);
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parents:
diff changeset
297 }
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parents:
diff changeset
298
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diff changeset
299 return true;
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parents:
diff changeset
300 }
2a5ef265e040 Added support for DXT1/3/5 and BC5/7 compressed textures via love.image.CompressedData. Some internals are still iffy.
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parents:
diff changeset
301
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parents:
diff changeset
302 bool Parser::parseData(const void *data, size_t dataSize)
2a5ef265e040 Added support for DXT1/3/5 and BC5/7 compressed textures via love.image.CompressedData. Some internals are still iffy.
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parents:
diff changeset
303 {
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diff changeset
304 if (!isDDS(data, dataSize))
2a5ef265e040 Added support for DXT1/3/5 and BC5/7 compressed textures via love.image.CompressedData. Some internals are still iffy.
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parents:
diff changeset
305 return false;
2a5ef265e040 Added support for DXT1/3/5 and BC5/7 compressed textures via love.image.CompressedData. Some internals are still iffy.
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parents:
diff changeset
306
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parents:
diff changeset
307 const uint8_t *readData = (const uint8_t *) data;
2a5ef265e040 Added support for DXT1/3/5 and BC5/7 compressed textures via love.image.CompressedData. Some internals are still iffy.
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diff changeset
308 ptrdiff_t offset = sizeof(uint32_t);
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parents:
diff changeset
309
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parents:
diff changeset
310 DDSHeader *header = (DDSHeader *) &readData[offset];
2a5ef265e040 Added support for DXT1/3/5 and BC5/7 compressed textures via love.image.CompressedData. Some internals are still iffy.
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parents:
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311 offset += sizeof(DDSHeader);
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312
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313
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314 // Check for DX10 extension.
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315 if ((header->format.flags & DDPF_FOURCC) && (header->format.fourCC == FourCC('D','X','1','0')))
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316 {
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317 DDSHeader10 *header10 = (DDSHeader10 *) &readData[offset];
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318 offset += sizeof(DDSHeader10);
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319
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320 // We can't deal with 1D/3D textures.
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321 switch (header10->resourceDimension)
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322 {
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323 case D3D10_RESOURCE_DIMENSION_TEXTURE2D:
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324 case D3D10_RESOURCE_DIMENSION_UNKNOWN:
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325 break;
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326 default:
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327 return false;
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328 }
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329
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330 // We also can't deal with texture arrays and cubemaps.
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331 if (header10->arraySize > 1)
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332 return false;
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333
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334 format = parseDX10Format(header10->dxgiFormat);
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335 }
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336 else
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337 format = parseDDSFormat(header->format);
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338
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339
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340 if (format == FORMAT_UNKNOWN)
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341 return false;
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342
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343
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344 int w = header->width;
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345 int h = header->height;
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346
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347 int mips = std::max((int) header->mipMapCount, 1);
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348
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349 return parseTexData(&readData[offset], dataSize - offset, format, w, h, mips);
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350 }
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351
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352 void Parser::clearData()
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353 {
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354 if (options & OPTIONS_COPY_DATA)
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355 {
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356 // Delete any data we created.
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357 std::vector<Image>::iterator it;
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358 for (it = texData.begin(); it != texData.end(); ++it)
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359 {
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360 delete[] it->data;
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361 it->data = 0;
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362 }
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363 }
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364
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365 texData.clear();
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366 }
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367
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368 } // dds