Mercurial > love-experiments

annotate src/modules/image/devil/CompressedData.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 /**
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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2 * Copyright (c) 2006-2013 LOVE Development Team
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3 *
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4 * This software is provided 'as-is', without any express or implied
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5 * warranty. In no event will the authors be held liable for any damages
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6 * arising from the use of this software.
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7 *
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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8 * Permission is granted to anyone to use this software for any purpose,
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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9 * including commercial applications, and to alter it and redistribute it
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10 * freely, subject to the following restrictions:
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11 *
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12 * 1. The origin of this software must not be misrepresented; you must not
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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13 * claim that you wrote the original software. If you use this software
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14 * in a product, an acknowledgment in the product documentation would be
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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15 * appreciated but is not required.
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16 * 2. Altered source versions must be plainly marked as such, and must not be
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 * misrepresented as being the original software.
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18 * 3. This notice may not be removed or altered from any source distribution.
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19 **/
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20
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21 #include "CompressedData.h"
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22
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23 namespace love
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24 {
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25 namespace image
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26 {
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27 namespace devil
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28 {
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29
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30 CompressedData::CompressedData(Data *data)
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31 {
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32 load(data);
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33 }
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34
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35 CompressedData::CompressedData(love::filesystem::File *file)
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36 {
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37 Data *data = file->read();
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38 try
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39 {
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40 load(data);
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41 }
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42 catch (love::Exception &)
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43 {
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44 data->release();
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45 throw;
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46 }
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47 }
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48
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49 CompressedData::~CompressedData()
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50 {
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51
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52 }
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53
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54 bool CompressedData::convertFormat(dds::Format ddsformat)
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55 {
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56 switch (ddsformat)
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57 {
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58 case dds::FORMAT_DXT1:
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59 type = TYPE_DXT1;
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60 break;
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61 case dds::FORMAT_DXT3:
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62 type = TYPE_DXT3;
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63 break;
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64 case dds::FORMAT_DXT5:
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65 type = TYPE_DXT5;
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66 break;
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67 case dds::FORMAT_BC5s:
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68 type = TYPE_BC5s;
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69 break;
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70 case dds::FORMAT_BC5u:
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71 type = TYPE_BC5u;
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72 break;
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73 case dds::FORMAT_BC7:
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74 type = TYPE_BC7;
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75 break;
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76 case dds::FORMAT_BC7srgb:
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77 type = TYPE_BC7srgb;
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78 break;
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79 default:
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80 return false;
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81 }
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82
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83 return true;
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84 }
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85
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86 void CompressedData::load(Data *data)
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87 {
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88 if (!dds::Parser::isDDS(data->getData(), data->getSize()))
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89 throw love::Exception("Could not decode compressed data (not a DDS file?)");
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90
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91 try
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92 {
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93 dds::Parser parser(data->getData(), data->getSize());
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94
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95 dds::Format format = parser.getFormat();
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96
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97 if (format == dds::FORMAT_UNKNOWN || !convertFormat(format))
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98 throw love::Exception("Could not parse compressed data: Unsupported format.");
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99
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100 if (parser.getNumMipmaps() == 0)
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101 throw love::Exception("Could not parse compressed data: No readable texture data.");
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102
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103 for (size_t i = 0; i < parser.getNumMipmaps(); i++)
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104 {
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105 const dds::Parser::Image *img = parser.getImageData(i);
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106
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107 MipmapInfo mip;
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108
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109 mip.width = img->width;
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110 mip.height = img->height;
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111 mip.size = img->dataSize;
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112
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113 mip.data.resize(mip.size);
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114 memcpy(&mip.data[0], img->data, mip.size);
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115
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116 dataMipmapInfo.push_back(mip);
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117 }
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118
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119 }
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120 catch (std::exception &e)
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121 {
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122 throw love::Exception(e.what());
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123 }
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124 }
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125
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126 bool CompressedData::isCompressed(const Data *data)
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127 {
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128 return dds::Parser::isDDS(data->getData(), data->getSize());
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129 }
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130
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131 } // devil
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132 } // image
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133 } // love