annotate src/modules/image/wrap_Image.cpp @ 1420:2a5ef265e040 image-CompressedData

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
parents b7f097053d74
children 377f9dad7a2d
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1 /**
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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 *
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8 * Permission is granted to anyone to use this software for any purpose,
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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
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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
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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
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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 "wrap_Image.h"
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22
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23 #include "common/Data.h"
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24 #include "common/StringMap.h"
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25
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26 #include "devil/Image.h"
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27
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28 namespace love
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29 {
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30 namespace image
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31 {
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32
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33 static Image *instance = 0;
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34
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35 int w_newImageData(lua_State *L)
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36 {
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37 // Case 1: Integers.
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38 if (lua_isnumber(L, 1))
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39 {
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40 int w = luaL_checkint(L, 1);
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41 int h = luaL_checkint(L, 2);
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42 if (w <= 0 || h <= 0)
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43 return luaL_error(L, "Invalid image size.");
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44
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45 ImageData *t = 0;
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46 try
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47 {
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48 t = instance->newImageData(w, h);
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49 }
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50 catch(love::Exception &e)
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51 {
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52 return luaL_error(L, "%s", e.what());
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53 }
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54 luax_newtype(L, "ImageData", IMAGE_IMAGE_DATA_T, (void *)t);
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55 return 1;
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56 }
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57
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58 // Case 2: Data
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59 if (luax_istype(L, 1, DATA_T))
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60 {
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61 Data *d = luax_checktype<Data>(L, 1, "Data", DATA_T);
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62 ImageData *t = 0;
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63 try
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64 {
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65 t = instance->newImageData(d);
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66 }
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67 catch(love::Exception &e)
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68 {
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69 return luaL_error(L, "%s", e.what());
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70 }
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71 luax_newtype(L, "ImageData", IMAGE_IMAGE_DATA_T, (void *)t);
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72 return 1;
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73 }
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74
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75 // Case 3: String/File.
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76
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77 // Convert to File, if necessary.
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78 if (lua_isstring(L, 1))
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79 luax_convobj(L, 1, "filesystem", "newFile");
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80
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81 love::filesystem::File *file = luax_checktype<love::filesystem::File>(L, 1, "File", FILESYSTEM_FILE_T);
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82
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83 ImageData *t = 0;
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84 try
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85 {
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86 t = instance->newImageData(file);
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87 }
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88 catch(love::Exception &e)
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89 {
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90 return luaL_error(L, "%s", e.what());
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91 }
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92 luax_newtype(L, "ImageData", IMAGE_IMAGE_DATA_T, (void *)t);
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93 return 1;
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94 }
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95
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96 int w_newCompressedData(lua_State *L)
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97 {
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98 // Case 1: Data
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99 if (luax_istype(L, 1, DATA_T))
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100 {
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101 Data *d = luax_checktype<Data>(L, 1, "Data", DATA_T);
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102
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103 CompressedData *t = 0;
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104 try
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105 {
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106 t = instance->newCompressedData(d);
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107 }
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108 catch (love::Exception &e)
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109 {
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110 return luaL_error(L, "%s", e.what());
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111 }
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112 luax_newtype(L, "CompressedData", IMAGE_COMPRESSED_DATA_T, (void *) t);
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114 return 1;
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115 }
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116
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117 // Case 2: String/File.
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118
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119 // Convert to File, if necessary.
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120 if (lua_isstring(L, 1))
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121 luax_convobj(L, 1, "filesystem", "newFile");
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122
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123 love::filesystem::File *file = luax_checktype<love::filesystem::File>(L, 1, "File", FILESYSTEM_FILE_T);
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124
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125 CompressedData *t = 0;
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126 try
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127 {
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128 t = instance->newCompressedData(file);
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129 }
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130 catch (love::Exception &e)
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131 {
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132 return luaL_error(L, "%s", e.what());
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133 }
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134 luax_newtype(L, "CompressedData", IMAGE_COMPRESSED_DATA_T, (void *) t);
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135
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136 return 1;
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137 }
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138
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139 int w_isCompressed(lua_State *L)
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140 {
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141 if (luax_istype(L, 1, DATA_T))
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142 {
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143 Data *d = luax_checktype<Data>(L, 1, "Data", DATA_T);
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144 try
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145 {
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146 bool compressed = instance->isCompressed(d);
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147 luax_pushboolean(L, compressed);
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148 }
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149 catch (love::Exception &e)
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150 {
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151 return luaL_error(L, "%s", e.what());
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152 }
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153 return 1;
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154 }
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155
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156 // Convert to File, if necessary.
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157 if (lua_isstring(L, 1))
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158 luax_convobj(L, 1, "filesystem", "newFile");
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159
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160 filesystem::File *file = luax_checktype<filesystem::File>(L, 1, "File", FILESYSTEM_FILE_T);
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161
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162 try
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163 {
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164 bool compressed = instance->isCompressed(file);
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165 luax_pushboolean(L, compressed);
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166 }
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167 catch (love::Exception &e)
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168 {
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169 return luaL_error(L, "%s", e.what());
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170 }
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171
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172 return 1;
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173 }
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174
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175 // List of functions to wrap.
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176 static const luaL_Reg functions[] =
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177 {
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178 { "newImageData", w_newImageData },
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179 { "newCompressedData", w_newCompressedData },
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180 { "isCompressed", w_isCompressed },
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181 { 0, 0 }
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182 };
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183
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184 static const lua_CFunction types[] =
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185 {
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186 luaopen_imagedata,
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187 luaopen_compresseddata,
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188 0
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189 };
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190
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191 extern "C" int luaopen_love_image(lua_State *L)
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192 {
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193 if (instance == 0)
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194 {
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195 try
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196 {
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197 instance = new love::image::devil::Image();
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198 }
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199 catch(Exception &e)
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200 {
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201 return luaL_error(L, "%s", e.what());
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202 }
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203 }
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204 else
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205 instance->retain();
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206
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207 WrappedModule w;
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208 w.module = instance;
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209 w.name = "image";
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210 w.flags = MODULE_IMAGE_T;
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211 w.functions = functions;
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212 w.types = types;
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213
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214 return luax_register_module(L, w);
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215 }
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216
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217 } // image
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218 } // love