1 | /*
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2 | -----------------------------------------------------------------------------
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3 | This source file is part of OGRE
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4 | (Object-oriented Graphics Rendering Engine)
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5 | For the latest info, see http://www.ogre3d.org/
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6 |
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7 | Copyright (c) 2000-2005 The OGRE Team
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8 | Also see acknowledgements in Readme.html
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9 |
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10 | This program is free software; you can redistribute it and/or modify it under
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11 | the terms of the GNU Lesser General Public License as published by the Free Software
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12 | Foundation; either version 2 of the License, or (at your option) any later
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13 | version.
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14 |
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15 | This program is distributed in the hope that it will be useful, but WITHOUT
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16 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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17 | FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
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18 |
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19 | You should have received a copy of the GNU Lesser General Public License along with
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20 | this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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21 | Place - Suite 330, Boston, MA 02111-1307, USA, or go to
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22 | http://www.gnu.org/copyleft/lesser.txt.
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23 | -----------------------------------------------------------------------------
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24 | */
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25 | #include "OgreStableHeaders.h"
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26 | #include "OgreILUtil.h"
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27 | #include "OgrePixelFormat.h"
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28 | #include "OgreBitwise.h"
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29 | #include "OgreColourValue.h"
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30 | #include "OgreException.h"
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31 |
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32 | #include <IL/il.h>
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33 | #include <IL/ilu.h>
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34 |
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35 | namespace Ogre {
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36 |
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37 | /*************************************************************************
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38 | * IL specific functions
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39 | */
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40 | PixelFormat ILUtil::ilFormat2OgreFormat( int ImageFormat, int ImageType )
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41 | {
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42 | PixelFormat fmt = PF_UNKNOWN;
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43 | switch( ImageFormat )
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44 | {
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45 | /* Compressed formats -- ignore type */
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46 | case IL_DXT1: fmt = PF_DXT1; break;
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47 | case IL_DXT2: fmt = PF_DXT2; break;
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48 | case IL_DXT3: fmt = PF_DXT3; break;
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49 | case IL_DXT4: fmt = PF_DXT4; break;
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50 | case IL_DXT5: fmt = PF_DXT5; break;
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51 | /* Normal formats */
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52 | case IL_RGB:
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53 | switch(ImageType)
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54 | {
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55 | case IL_FLOAT: fmt = PF_FLOAT32_RGB; break;
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56 | case IL_UNSIGNED_SHORT:
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57 | case IL_SHORT: fmt = PF_SHORT_RGBA; break;
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58 | default: fmt = PF_BYTE_RGB; break;
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59 | }
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60 | break;
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61 | case IL_BGR:
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62 | switch(ImageType)
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63 | {
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64 | case IL_FLOAT: fmt = PF_FLOAT32_RGB; break;
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65 | case IL_UNSIGNED_SHORT:
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66 | case IL_SHORT: fmt = PF_SHORT_RGBA; break;
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67 | default: fmt = PF_BYTE_BGR; break;
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68 | }
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69 | break;
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70 | case IL_RGBA:
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71 | switch(ImageType)
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72 | {
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73 | case IL_FLOAT: fmt = PF_FLOAT32_RGBA; break;
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74 | case IL_UNSIGNED_SHORT:
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75 | case IL_SHORT: fmt = PF_SHORT_RGBA; break;
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76 | default: fmt = PF_BYTE_RGBA; break;
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77 | }
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78 | break;
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79 | case IL_BGRA:
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80 | switch(ImageType)
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81 | {
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82 | case IL_FLOAT: fmt = PF_FLOAT32_RGBA; break;
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83 | case IL_UNSIGNED_SHORT:
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84 | case IL_SHORT: fmt = PF_SHORT_RGBA; break;
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85 | default: fmt = PF_BYTE_BGRA; break;
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86 | }
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87 | break;
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88 | case IL_LUMINANCE:
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89 | switch(ImageType)
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90 | {
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91 | case IL_BYTE:
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92 | case IL_UNSIGNED_BYTE:
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93 | fmt = PF_L8;
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94 | break;
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95 | default:
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96 | fmt = PF_L16;
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97 | }
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98 | break;
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99 | case IL_LUMINANCE_ALPHA:
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100 | fmt = PF_BYTE_LA;
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101 | break;
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102 | }
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103 | return fmt;
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104 | }
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105 |
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106 | //-----------------------------------------------------------------------
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107 |
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108 | ILUtil::ILFormat ILUtil::OgreFormat2ilFormat( PixelFormat format )
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109 | {
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110 | switch(format) {
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111 | case PF_BYTE_L: return ILFormat(1, IL_LUMINANCE, IL_UNSIGNED_BYTE);
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112 | case PF_BYTE_A: return ILFormat(1, IL_LUMINANCE, IL_UNSIGNED_BYTE);
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113 | case PF_SHORT_L: return ILFormat(1, IL_LUMINANCE, IL_UNSIGNED_SHORT);
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114 | case PF_BYTE_LA: return ILFormat(2, IL_LUMINANCE_ALPHA, IL_UNSIGNED_BYTE);
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115 | case PF_BYTE_RGB: return ILFormat(3, IL_RGB, IL_UNSIGNED_BYTE);
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116 | case PF_BYTE_RGBA: return ILFormat(4, IL_RGBA, IL_UNSIGNED_BYTE);
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117 | case PF_BYTE_BGR: return ILFormat(3, IL_BGR, IL_UNSIGNED_BYTE);
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118 | case PF_BYTE_BGRA: return ILFormat(4, IL_BGRA, IL_UNSIGNED_BYTE);
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119 | case PF_SHORT_RGBA: return ILFormat(4, IL_RGBA, IL_UNSIGNED_SHORT);
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120 | case PF_FLOAT32_RGB: return ILFormat(3, IL_RGB, IL_FLOAT);
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121 | case PF_FLOAT32_RGBA: return ILFormat(4, IL_RGBA, IL_FLOAT);
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122 | case PF_DXT1: return ILFormat(0, IL_DXT1);
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123 | case PF_DXT2: return ILFormat(0, IL_DXT2);
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124 | case PF_DXT3: return ILFormat(0, IL_DXT3);
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125 | case PF_DXT4: return ILFormat(0, IL_DXT4);
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126 | case PF_DXT5: return ILFormat(0, IL_DXT5);
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127 | default: return ILFormat();
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128 | }
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129 | }
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130 |
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131 | //-----------------------------------------------------------------------
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132 | /// Helper functions for DevIL to Ogre conversion
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133 | inline void packI(uint8 r, uint8 g, uint8 b, uint8 a, PixelFormat pf, void* dest)
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134 | {
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135 | PixelUtil::packColour(r, g, b, a, pf, dest);
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136 | }
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137 | inline void packI(uint16 r, uint16 g, uint16 b, uint16 a, PixelFormat pf, void* dest)
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138 | {
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139 | PixelUtil::packColour((float)r/65535.0f, (float)g/65535.0f,
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140 | (float)b/65535.0f, (float)a/65535.0f, pf, dest);
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141 | }
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142 | inline void packI(float r, float g, float b, float a, PixelFormat pf, void* dest)
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143 | {
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144 | PixelUtil::packColour(r, g, b, a, pf, dest);
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145 | }
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146 | template <typename T> void ilToOgreInternal(uint8 *tar, PixelFormat ogrefmt,
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147 | T r, T g, T b, T a)
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148 | {
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149 | const int ilfmt = ilGetInteger( IL_IMAGE_FORMAT );
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150 | T *src = (T*)ilGetData();
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151 | T *srcend = (T*)((uint8*)ilGetData() + ilGetInteger( IL_IMAGE_SIZE_OF_DATA ));
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152 | const size_t elemSize = PixelUtil::getNumElemBytes(ogrefmt);
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153 | while(src < srcend) {
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154 | switch(ilfmt) {
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155 | case IL_RGB:
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156 | r = src[0]; g = src[1]; b = src[2];
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157 | src += 3;
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158 | break;
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159 | case IL_BGR:
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160 | b = src[0]; g = src[1]; r = src[2];
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161 | src += 3;
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162 | break;
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163 | case IL_LUMINANCE:
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164 | r = src[0]; g = src[0]; b = src[0];
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165 | src += 1;
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166 | break;
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167 | case IL_LUMINANCE_ALPHA:
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168 | r = src[0]; g = src[0]; b = src[0]; a = src[1];
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169 | src += 2;
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170 | break;
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171 | case IL_RGBA:
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172 | r = src[0]; g = src[1]; b = src[2]; a = src[3];
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173 | src += 4;
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174 | break;
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175 | case IL_BGRA:
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176 | b = src[0]; g = src[1]; r = src[2]; a = src[3];
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177 | src += 4;
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178 | break;
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179 | default:
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180 | return;
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181 | }
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182 | packI(r, g, b, a, ogrefmt, tar);
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183 | tar += elemSize;
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184 | }
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185 |
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186 | }
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187 | //-----------------------------------------------------------------------
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188 | /// Utility function to convert IL data types to UNSIGNED_
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189 | ILenum ILabs(ILenum in) {
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190 | switch(in) {
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191 | case IL_INT: return IL_UNSIGNED_INT;
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192 | case IL_BYTE: return IL_UNSIGNED_BYTE;
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193 | case IL_SHORT: return IL_UNSIGNED_SHORT;
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194 | default: return in;
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195 | }
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196 | }
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197 | //-----------------------------------------------------------------------
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198 | void ILUtil::toOgre(const PixelBox &dst)
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199 | {
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200 | if(!dst.isConsecutive())
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201 | OGRE_EXCEPT( Exception::UNIMPLEMENTED_FEATURE,
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202 | "Destination must currently be consecutive",
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203 | "ILUtil::ilToOgre" ) ;
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204 | if(dst.getWidth() != static_cast<size_t>(ilGetInteger( IL_IMAGE_WIDTH )) ||
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205 | dst.getHeight() != static_cast<size_t>(ilGetInteger( IL_IMAGE_HEIGHT )) ||
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206 | dst.getDepth() != static_cast<size_t>(ilGetInteger( IL_IMAGE_DEPTH )))
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207 | OGRE_EXCEPT( Exception::ERR_INVALIDPARAMS,
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208 | "Destination dimensions must equal IL dimension",
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209 | "ILUtil::ilToOgre" ) ;
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210 |
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211 | int ilfmt = ilGetInteger( IL_IMAGE_FORMAT );
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212 | int iltp = ilGetInteger( IL_IMAGE_TYPE );
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213 |
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214 | // Check if in-memory format just matches
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215 | // If yes, we can just copy it and save conversion
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216 | ILFormat ifmt = OgreFormat2ilFormat( dst.format );
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217 | if(ifmt.format == ilfmt && ILabs(ifmt.type) == ILabs(iltp)) {
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218 | memcpy(dst.data, ilGetData(), ilGetInteger( IL_IMAGE_SIZE_OF_DATA ));
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219 | return;
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220 | }
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221 | // Try if buffer is in a known OGRE format so we can use OGRE its
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222 | // conversion routines
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223 | PixelFormat bufFmt = ilFormat2OgreFormat((int)ilfmt, (int)iltp);
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224 |
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225 | ifmt = OgreFormat2ilFormat( bufFmt );
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226 | if(ifmt.format == ilfmt && ILabs(ifmt.type) == ILabs(iltp))
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227 | {
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228 | // IL format matches another OGRE format
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229 | PixelBox src(dst.getWidth(), dst.getHeight(), dst.getDepth(), bufFmt, ilGetData());
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230 | PixelUtil::bulkPixelConversion(src, dst);
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231 | return;
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232 | }
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233 |
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234 | // Thee extremely slow method
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235 | if(iltp == IL_UNSIGNED_BYTE || iltp == IL_BYTE)
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236 | {
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237 | ilToOgreInternal(static_cast<uint8*>(dst.data), dst.format, (uint8)0x00,(uint8)0x00,(uint8)0x00,(uint8)0xFF);
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238 | }
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239 | else if(iltp == IL_FLOAT)
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240 | {
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241 | ilToOgreInternal(static_cast<uint8*>(dst.data), dst.format, 0.0f,0.0f,0.0f,1.0f);
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242 | }
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243 | else if(iltp == IL_SHORT || iltp == IL_UNSIGNED_SHORT)
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244 | {
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245 | ilToOgreInternal(static_cast<uint8*>(dst.data), dst.format,
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246 | (uint16)0x0000,(uint16)0x0000,(uint16)0x0000,(uint16)0xFFFF);
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247 | }
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248 | else
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249 | {
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250 | OGRE_EXCEPT( Exception::UNIMPLEMENTED_FEATURE,
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251 | "Cannot convert this DevIL type",
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252 | "ILUtil::ilToOgre" ) ;
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253 | }
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254 | }
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255 | //-----------------------------------------------------------------------
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256 | void ILUtil::fromOgre(const PixelBox &src)
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257 | {
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258 | // ilTexImage http://openil.sourceforge.net/docs/il/f00059.htm
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259 | ILFormat ifmt = OgreFormat2ilFormat( src.format );
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260 | if(src.isConsecutive() && ifmt.isValid())
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261 | {
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262 | // The easy case, the buffer is laid out in memory just like
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263 | // we want it to be and is in a format DevIL can understand directly
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264 | // We could even save the copy if DevIL would let us
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265 | ilTexImage(static_cast<ILuint>(src.getWidth()),
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266 | static_cast<ILuint>(src.getHeight()),
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267 | static_cast<ILuint>(src.getDepth()), ifmt.numberOfChannels,
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268 | ifmt.format, ifmt.type, src.data);
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269 | }
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270 | else if(ifmt.isValid())
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271 | {
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272 | // The format can be understood directly by DevIL. The only
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273 | // problem is that ilTexImage expects our image data consecutively
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274 | // so we cannot use that directly.
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275 |
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276 | // Let DevIL allocate the memory for us, and copy the data consecutively
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277 | // to its memory
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278 | ilTexImage(static_cast<ILuint>(src.getWidth()),
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279 | static_cast<ILuint>(src.getHeight()),
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280 | static_cast<ILuint>(src.getDepth()), ifmt.numberOfChannels,
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281 | ifmt.format, ifmt.type, 0);
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282 | PixelBox dst(src.getWidth(), src.getHeight(), src.getDepth(), src.format, ilGetData());
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283 | PixelUtil::bulkPixelConversion(src, dst);
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284 | }
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285 | else
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286 | {
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287 | // Here it gets ugly. We're stuck with a pixel format that DevIL
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288 | // can't do anything with. We will do a bulk pixel conversion and
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289 | // then feed it to DevIL anyway. The problem is finding the best
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290 | // format to convert to.
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291 |
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292 | // most general format supported by OGRE and DevIL
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293 | PixelFormat fmt = PixelUtil::hasAlpha(src.format)?PF_FLOAT32_RGBA:PF_FLOAT32_RGB;
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294 |
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295 | // Make up a pixel format
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296 | // We don't have to consider luminance formats as they have
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297 | // straight conversions to DevIL, just weird permutations of RGBA an LA
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298 | int depths[4];
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299 | PixelUtil::getBitDepths(src.format, depths);
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300 |
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301 | // Native endian format with all bit depths<8 can safely and quickly be
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302 | // converted to 24/32 bit
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303 | if(PixelUtil::isNativeEndian(src.format) &&
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304 | depths[0]<=8 && depths[1]<=8 && depths[2]<=8 && depths[3]<=8) {
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305 | if(PixelUtil::hasAlpha(src.format)) {
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306 | fmt = PF_A8R8G8B8;
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307 | } else {
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308 | fmt = PF_R8G8B8;
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309 | }
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310 | }
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311 |
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312 | // Let DevIL allocate the memory for us, then do the conversion ourselves
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313 | ifmt = OgreFormat2ilFormat( fmt );
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314 | ilTexImage(static_cast<ILuint>(src.getWidth()),
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315 | static_cast<ILuint>(src.getHeight()),
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316 | static_cast<ILuint>(src.getDepth()), ifmt.numberOfChannels,
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317 | ifmt.format, ifmt.type, 0);
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318 | PixelBox dst(src.getWidth(), src.getHeight(), src.getDepth(), fmt, ilGetData());
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319 | PixelUtil::bulkPixelConversion(src, dst);
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320 | }
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321 | }
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322 |
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323 | }
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