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) 2000-2006 Torus Knot Software Ltd |
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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 | You may alternatively use this source under the terms of a specific version of |
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25 | the OGRE Unrestricted License provided you have obtained such a license from |
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26 | Torus Knot Software Ltd. |
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27 | ----------------------------------------------------------------------------- |
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28 | */ |
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29 | #include "OgreStableHeaders.h" |
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30 | |
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31 | #include "OgreException.h" |
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32 | #include "OgreLogManager.h" |
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33 | #include "OgreRoot.h" |
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34 | #include "OgreStringConverter.h" |
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35 | |
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36 | #include "OgreGLRenderSystem.h" |
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37 | #include "OgreGLXUtils.h" |
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38 | |
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39 | #include "OgreNoMemoryMacros.h" |
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40 | #include <GL/glxext.h> |
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41 | |
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42 | namespace Ogre { |
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43 | struct visual_attribs |
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44 | { |
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45 | /* X visual attribs */ |
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46 | int id; |
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47 | int klass; |
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48 | int depth; |
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49 | int redMask, greenMask, blueMask; |
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50 | int colormapSize; |
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51 | int bitsPerRGB; |
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52 | |
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53 | /* GL visual attribs */ |
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54 | int supportsGL; |
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55 | int transparentType; |
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56 | int transparentRedValue; |
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57 | int transparentGreenValue; |
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58 | int transparentBlueValue; |
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59 | int transparentAlphaValue; |
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60 | int transparentIndexValue; |
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61 | int bufferSize; |
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62 | int level; |
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63 | int rgba; |
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64 | int doubleBuffer; |
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65 | int stereo; |
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66 | int auxBuffers; |
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67 | int redSize, greenSize, blueSize, alphaSize; |
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68 | int depthSize; |
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69 | int stencilSize; |
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70 | int accumRedSize, accumGreenSize, accumBlueSize, accumAlphaSize; |
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71 | int numSamples, numMultisample; |
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72 | int visualCaveat; |
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73 | }; |
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74 | |
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75 | |
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76 | |
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77 | FBConfigData::FBConfigData(): |
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78 | configID(0), visualID(0), bufferSize(0), level(0), doubleBuffer(0), stereo(0), |
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79 | auxBuffers(0), renderType(0), |
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80 | redSize(0), greenSize(0), blueSize(0), alphaSize(0), |
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81 | depthSize(0), stencilSize(0), |
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82 | accumRedSize(0), accumGreenSize(0), accumBlueSize(0), accumAlphaSize(0), |
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83 | drawableType(0), caveat(0), |
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84 | maxPBufferWidth(0), maxPBufferHeight(0), maxPBufferPixels(0) |
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85 | { |
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86 | memset(this, 0, sizeof(FBConfigData)); |
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87 | } |
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88 | FBConfigData::FBConfigData(Display *dpy, GLXFBConfig config) |
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89 | { |
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90 | memset(this, 0, sizeof(FBConfigData)); |
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91 | |
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92 | glXGetFBConfigAttrib(dpy, config, GLX_FBCONFIG_ID, &configID); |
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93 | glXGetFBConfigAttrib(dpy, config, GLX_VISUAL_ID, &visualID); |
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94 | glXGetFBConfigAttrib(dpy, config, GLX_BUFFER_SIZE, &bufferSize); |
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95 | glXGetFBConfigAttrib(dpy, config, GLX_LEVEL, &level); |
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96 | glXGetFBConfigAttrib(dpy, config, GLX_DOUBLEBUFFER, &doubleBuffer); |
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97 | glXGetFBConfigAttrib(dpy, config, GLX_STEREO, &stereo); |
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98 | glXGetFBConfigAttrib(dpy, config, GLX_AUX_BUFFERS, &auxBuffers); |
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99 | glXGetFBConfigAttrib(dpy, config, GLX_RENDER_TYPE, &renderType); |
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100 | glXGetFBConfigAttrib(dpy, config, GLX_RED_SIZE, &redSize); |
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101 | glXGetFBConfigAttrib(dpy, config, GLX_GREEN_SIZE, &greenSize); |
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102 | glXGetFBConfigAttrib(dpy, config, GLX_BLUE_SIZE, &blueSize); |
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103 | glXGetFBConfigAttrib(dpy, config, GLX_ALPHA_SIZE, &alphaSize); |
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104 | glXGetFBConfigAttrib(dpy, config, GLX_DEPTH_SIZE, &depthSize); |
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105 | glXGetFBConfigAttrib(dpy, config, GLX_STENCIL_SIZE, &stencilSize); |
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106 | glXGetFBConfigAttrib(dpy, config, GLX_ACCUM_RED_SIZE, &accumRedSize); |
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107 | glXGetFBConfigAttrib(dpy, config, GLX_ACCUM_GREEN_SIZE, &accumGreenSize); |
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108 | glXGetFBConfigAttrib(dpy, config, GLX_ACCUM_BLUE_SIZE, &accumBlueSize); |
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109 | glXGetFBConfigAttrib(dpy, config, GLX_ACCUM_ALPHA_SIZE, &accumAlphaSize); |
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110 | glXGetFBConfigAttrib(dpy, config, GLX_DRAWABLE_TYPE, &drawableType); |
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111 | glXGetFBConfigAttrib(dpy, config, GLX_CONFIG_CAVEAT, &caveat); |
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112 | glXGetFBConfigAttrib(dpy, config, GLX_MAX_PBUFFER_WIDTH, &maxPBufferWidth); |
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113 | glXGetFBConfigAttrib(dpy, config, GLX_MAX_PBUFFER_HEIGHT, &maxPBufferHeight); |
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114 | glXGetFBConfigAttrib(dpy, config, GLX_MAX_PBUFFER_PIXELS, &maxPBufferPixels); |
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115 | } |
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116 | String FBConfigData::toString() const |
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117 | { |
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118 | std::stringstream ss; |
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119 | ss << "configID=" << configID; |
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120 | ss << " visualID=" << visualID; |
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121 | ss << " bufferSize=" << bufferSize; |
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122 | ss << " level=" << level; |
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123 | ss << " doubleBuffer=" << doubleBuffer; |
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124 | ss << " stereo=" << stereo; |
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125 | ss << " auxBuffers=" << auxBuffers; |
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126 | ss << " renderType=" << renderType; |
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127 | ss << " redSize=" << redSize; |
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128 | ss << " greenSize=" << greenSize; |
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129 | ss << " blueSize=" << blueSize; |
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130 | ss << " alphaSize=" << alphaSize; |
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131 | ss << " depthSize=" << depthSize; |
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132 | ss << " stencilSize=" << stencilSize; |
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133 | ss << " accumRedSize=" << accumRedSize; |
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134 | ss << " accumGreenSize=" << accumGreenSize; |
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135 | ss << " accumBlueSize=" << accumBlueSize; |
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136 | ss << " accumAlphaSize=" << accumAlphaSize; |
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137 | ss << " drawableType=" << drawableType; |
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138 | ss << " caveat=" << caveat; |
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139 | ss << " maxPBufferWidth=" << maxPBufferWidth; |
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140 | ss << " maxPBufferHeight=" << maxPBufferHeight; |
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141 | ss << " maxPBufferPixels=" << maxPBufferPixels; |
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142 | return ss.str(); |
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143 | } |
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144 | |
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145 | bool GLXUtils::LoadIcon(Display *mDisplay, Window rootWindow, const std::string &name, Pixmap *pix, Pixmap *mask) |
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146 | { |
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147 | Image img; |
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148 | int mWidth, mHeight; |
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149 | char *data, *bitmap; |
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150 | try { |
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151 | // Try to load image |
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152 | img.load(name, ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME); |
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153 | mWidth = img.getWidth(); |
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154 | mHeight = img.getHeight(); |
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155 | if(img.getFormat() != PF_A8R8G8B8) |
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156 | // Image format must be RGBA |
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157 | return 0; |
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158 | } catch(Exception &e) { |
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159 | // Could not find image; never mind |
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160 | return false; |
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161 | } |
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162 | |
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163 | // Allocate space for image data |
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164 | data = (char*)malloc(mWidth * mHeight * 4); // Must be allocated with malloc |
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165 | // Allocate space for transparency bitmap |
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166 | int wbits = (mWidth+7)/8; |
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167 | bitmap = (char*)malloc(wbits * mHeight); |
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168 | |
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169 | // Convert and copy image |
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170 | const char *imgdata = (const char*)img.getData(); |
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171 | int sptr = 0, dptr = 0; |
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172 | for(int y=0; y<mHeight; y++) { |
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173 | for(int x=0; x<mWidth; x++) { |
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174 | data[dptr + 0] = 0; |
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175 | data[dptr + 1] = imgdata[sptr + 0]; |
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176 | data[dptr + 2] = imgdata[sptr + 1]; |
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177 | data[dptr + 3] = imgdata[sptr + 2]; |
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178 | // Alpha threshold |
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179 | if(((unsigned char)imgdata[sptr + 3])<128) { |
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180 | bitmap[y*wbits+(x>>3)] &= ~(1<<(x&7)); |
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181 | } else { |
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182 | bitmap[y*wbits+(x>>3)] |= 1<<(x&7); |
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183 | } |
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184 | sptr += 4; |
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185 | dptr += 4; |
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186 | } |
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187 | } |
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188 | |
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189 | /* put my pixmap data into the client side X image data structure */ |
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190 | XImage *image = XCreateImage (mDisplay, NULL, 24, ZPixmap, 0, |
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191 | data, |
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192 | mWidth, mHeight, 8, |
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193 | mWidth*4); |
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194 | image->byte_order = MSBFirst; // 0RGB format |
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195 | |
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196 | /* tell server to start managing my pixmap */ |
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197 | Pixmap retval = XCreatePixmap(mDisplay, rootWindow, mWidth, |
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198 | mHeight, 24); |
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199 | |
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200 | /* copy from client to server */ |
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201 | GC context = XCreateGC (mDisplay, rootWindow, 0, NULL); |
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202 | XPutImage(mDisplay, retval, context, image, 0, 0, 0, 0, |
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203 | mWidth, mHeight); |
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204 | |
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205 | /* free up the client side pixmap data area */ |
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206 | XDestroyImage(image); // also cleans data |
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207 | XFreeGC(mDisplay, context); |
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208 | |
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209 | *pix = retval; |
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210 | *mask = XCreateBitmapFromData(mDisplay, rootWindow, bitmap, mWidth, mHeight); |
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211 | free(bitmap); |
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212 | return true; |
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213 | } |
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214 | |
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215 | |
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216 | |
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217 | static void |
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218 | get_visual_attribs(Display *dpy, XVisualInfo *vInfo, |
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219 | struct visual_attribs *attribs) |
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220 | { |
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221 | const char *ext = glXQueryExtensionsString(dpy, vInfo->screen); |
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222 | |
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223 | memset(attribs, 0, sizeof(struct visual_attribs)); |
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224 | |
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225 | attribs->id = vInfo->visualid; |
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226 | #if defined(__cplusplus) || defined(c_plusplus) |
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227 | |
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228 | attribs->klass = vInfo->c_class; |
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229 | #else |
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230 | |
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231 | attribs->klass = vInfo->class; |
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232 | #endif |
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233 | |
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234 | attribs->depth = vInfo->depth; |
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235 | attribs->redMask = vInfo->red_mask; |
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236 | attribs->greenMask = vInfo->green_mask; |
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237 | attribs->blueMask = vInfo->blue_mask; |
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238 | attribs->colormapSize = vInfo->colormap_size; |
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239 | attribs->bitsPerRGB = vInfo->bits_per_rgb; |
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240 | |
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241 | if (glXGetConfig(dpy, vInfo, GLX_USE_GL, &attribs->supportsGL) != 0) |
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242 | return; |
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243 | glXGetConfig(dpy, vInfo, GLX_BUFFER_SIZE, &attribs->bufferSize); |
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244 | glXGetConfig(dpy, vInfo, GLX_LEVEL, &attribs->level); |
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245 | glXGetConfig(dpy, vInfo, GLX_RGBA, &attribs->rgba); |
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246 | glXGetConfig(dpy, vInfo, GLX_DOUBLEBUFFER, &attribs->doubleBuffer); |
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247 | glXGetConfig(dpy, vInfo, GLX_STEREO, &attribs->stereo); |
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248 | glXGetConfig(dpy, vInfo, GLX_AUX_BUFFERS, &attribs->auxBuffers); |
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249 | glXGetConfig(dpy, vInfo, GLX_RED_SIZE, &attribs->redSize); |
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250 | glXGetConfig(dpy, vInfo, GLX_GREEN_SIZE, &attribs->greenSize); |
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251 | glXGetConfig(dpy, vInfo, GLX_BLUE_SIZE, &attribs->blueSize); |
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252 | glXGetConfig(dpy, vInfo, GLX_ALPHA_SIZE, &attribs->alphaSize); |
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253 | glXGetConfig(dpy, vInfo, GLX_DEPTH_SIZE, &attribs->depthSize); |
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254 | glXGetConfig(dpy, vInfo, GLX_STENCIL_SIZE, &attribs->stencilSize); |
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255 | glXGetConfig(dpy, vInfo, GLX_ACCUM_RED_SIZE, &attribs->accumRedSize); |
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256 | glXGetConfig(dpy, vInfo, GLX_ACCUM_GREEN_SIZE, &attribs->accumGreenSize); |
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257 | glXGetConfig(dpy, vInfo, GLX_ACCUM_BLUE_SIZE, &attribs->accumBlueSize); |
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258 | glXGetConfig(dpy, vInfo, GLX_ACCUM_ALPHA_SIZE, &attribs->accumAlphaSize); |
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259 | |
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260 | /* get transparent pixel stuff */ |
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261 | glXGetConfig(dpy, vInfo,GLX_TRANSPARENT_TYPE, &attribs->transparentType); |
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262 | if (attribs->transparentType == GLX_TRANSPARENT_RGB) { |
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263 | glXGetConfig(dpy, vInfo, GLX_TRANSPARENT_RED_VALUE, &attribs->transparentRedValue); |
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264 | glXGetConfig(dpy, vInfo, GLX_TRANSPARENT_GREEN_VALUE, &attribs->transparentGreenValue); |
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265 | glXGetConfig(dpy, vInfo, GLX_TRANSPARENT_BLUE_VALUE, &attribs->transparentBlueValue); |
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266 | glXGetConfig(dpy, vInfo, GLX_TRANSPARENT_ALPHA_VALUE, &attribs->transparentAlphaValue); |
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267 | } else if (attribs->transparentType == GLX_TRANSPARENT_INDEX) { |
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268 | glXGetConfig(dpy, vInfo, GLX_TRANSPARENT_INDEX_VALUE, &attribs->transparentIndexValue); |
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269 | } |
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270 | |
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271 | /* multisample attribs */ |
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272 | if (ext && strstr("GLX_ARB_multisample", ext) == 0) { |
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273 | glXGetConfig(dpy, vInfo, GLX_SAMPLE_BUFFERS_ARB, &attribs->numMultisample); |
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274 | glXGetConfig(dpy, vInfo, GLX_SAMPLES_ARB, &attribs->numSamples); |
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275 | } |
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276 | else { |
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277 | attribs->numSamples = 0; |
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278 | attribs->numMultisample = 0; |
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279 | } |
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280 | |
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281 | if (ext && strstr(ext, "GLX_EXT_visual_rating")) { |
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282 | glXGetConfig(dpy, vInfo, GLX_VISUAL_CAVEAT_EXT, &attribs->visualCaveat); |
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283 | } else { |
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284 | attribs->visualCaveat = GLX_NONE_EXT; |
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285 | } |
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286 | } |
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287 | |
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288 | /* |
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289 | * Examine all visuals to find the so-called best one. |
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290 | * We prefer deepest RGBA buffer with depth, stencil and accum |
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291 | * that has no caveats. |
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292 | * @author Brian Paul (from the glxinfo source) |
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293 | */ |
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294 | int GLXUtils::findBestVisual(Display *dpy, int scrnum, int multiSample) |
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295 | { |
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296 | XVisualInfo theTemplate; |
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297 | XVisualInfo *visuals; |
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298 | int numVisuals; |
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299 | long mask; |
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300 | int i; |
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301 | struct visual_attribs bestVis; |
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302 | int msDiff; |
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303 | |
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304 | /* get list of all visuals on this screen */ |
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305 | theTemplate.screen = scrnum; |
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306 | mask = VisualScreenMask; |
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307 | visuals = XGetVisualInfo(dpy, mask, &theTemplate, &numVisuals); |
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308 | if(numVisuals == 0 || visuals == 0) { |
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309 | /* something went wrong */ |
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310 | if(visuals) |
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311 | XFree(visuals); |
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312 | return -1; |
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313 | } |
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314 | |
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315 | /* init bestVis with first visual info */ |
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316 | get_visual_attribs(dpy, &visuals[0], &bestVis); |
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317 | |
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318 | /* try to find a "better" visual */ |
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319 | for (i = 1; i < numVisuals; i++) { |
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320 | struct visual_attribs vis; |
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321 | |
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322 | get_visual_attribs(dpy, &visuals[i], &vis); |
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323 | |
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324 | /* always skip visuals that are slow */ |
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325 | if (vis.visualCaveat == GLX_SLOW_VISUAL_EXT) |
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326 | continue; |
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327 | /* skip visual if it doesn't have the desired number of multisamples */ |
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328 | if (multiSample != -1 && vis.numSamples != multiSample) |
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329 | continue; |
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330 | |
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331 | /* see if this vis is better than bestVis */ |
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332 | |
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333 | if ((!bestVis.supportsGL && vis.supportsGL) || |
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334 | (bestVis.visualCaveat != GLX_NONE_EXT) || |
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335 | (!bestVis.rgba && vis.rgba) || |
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336 | (!bestVis.doubleBuffer && vis.doubleBuffer) || |
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337 | (bestVis.redSize < vis.redSize) || |
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338 | (bestVis.greenSize < vis.greenSize) || |
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339 | (bestVis.blueSize < vis.blueSize) || |
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340 | (bestVis.alphaSize < vis.alphaSize) || |
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341 | (bestVis.depthSize < vis.depthSize) || |
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342 | (bestVis.stencilSize < vis.stencilSize) || |
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343 | (bestVis.accumRedSize < vis.accumRedSize)) |
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344 | { |
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345 | /* found a better visual */ |
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346 | bestVis = vis; |
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347 | } |
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348 | |
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349 | } |
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350 | |
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351 | XFree(visuals); |
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352 | if (multiSample != -1 && bestVis.numSamples != multiSample) |
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353 | // We found no visual with the desired FSAA |
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354 | return -1; |
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355 | return bestVis.id; |
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356 | } |
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357 | |
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358 | /** |
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359 | * Class to sort FBConfig records by best match |
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360 | */ |
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361 | class FBConfigMatchSort |
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362 | { |
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363 | public: |
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364 | FBConfigMatchSort(Display *dpy, const int *idealattribs): dpy(dpy), mIdeal(idealattribs) { } |
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365 | |
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366 | Display *dpy; |
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367 | const int *mIdeal; |
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368 | bool operator()(const GLXFBConfig & a, const GLXFBConfig & b) |
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369 | { |
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370 | for(int idx = 0; mIdeal[idx] != None; idx += 2) |
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371 | { |
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372 | int valuea, valueb; |
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373 | int valueideal = mIdeal[idx+1]; |
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374 | glXGetFBConfigAttrib(dpy, a, mIdeal[idx], &valuea); |
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375 | glXGetFBConfigAttrib(dpy, b, mIdeal[idx], &valueb); |
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376 | // Distance to a smaller than distance to b? |
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377 | if(std::abs(valuea - valueideal) < std::abs(valueb - valueideal)) |
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378 | return true; |
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379 | } |
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380 | return false; |
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381 | } |
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382 | }; |
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383 | |
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384 | |
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385 | GLXFBConfig GLXUtils::findBestMatch(Display *dpy, int scrnum, const int *attribs, const int *idealattribs) |
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386 | { |
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387 | // Create vector of existing config data formats |
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388 | GLXFBConfig * fbConfigs; |
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389 | int nConfigs; |
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390 | fbConfigs = glXChooseFBConfig(dpy, scrnum, attribs, &nConfigs); |
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391 | if (nConfigs == 0 || !fbConfigs) |
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392 | OGRE_EXCEPT(Exception::ERR_NOT_IMPLEMENTED, "glXChooseFBConfig() failed: Couldn't find a suitable pixel format", "GLRenderTexture::createPBuffer"); |
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393 | |
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394 | // Sort by best match |
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395 | std::sort(fbConfigs, fbConfigs+nConfigs, FBConfigMatchSort(dpy, idealattribs)); |
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396 | |
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397 | GLXFBConfig retval = fbConfigs[0]; |
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398 | XFree(fbConfigs); |
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399 | |
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400 | return retval; |
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401 | } |
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402 | |
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403 | }; |
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