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1 /**************************************************************************** |
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2 ** |
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3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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4 ** All rights reserved. |
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5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
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6 ** |
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7 ** This file is part of the QtOpenGL module of the Qt Toolkit. |
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8 ** |
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9 ** $QT_BEGIN_LICENSE:LGPL$ |
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10 ** No Commercial Usage |
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11 ** This file contains pre-release code and may not be distributed. |
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12 ** You may use this file in accordance with the terms and conditions |
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13 ** contained in the Technology Preview License Agreement accompanying |
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14 ** this package. |
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15 ** |
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16 ** GNU Lesser General Public License Usage |
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17 ** Alternatively, this file may be used under the terms of the GNU Lesser |
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18 ** General Public License version 2.1 as published by the Free Software |
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19 ** Foundation and appearing in the file LICENSE.LGPL included in the |
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20 ** packaging of this file. Please review the following information to |
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21 ** ensure the GNU Lesser General Public License version 2.1 requirements |
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22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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23 ** |
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24 ** In addition, as a special exception, Nokia gives you certain additional |
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25 ** rights. These rights are described in the Nokia Qt LGPL Exception |
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26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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27 ** |
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28 ** If you have questions regarding the use of this file, please contact |
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29 ** Nokia at qt-info@nokia.com. |
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30 ** |
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31 ** |
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32 ** |
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33 ** |
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34 ** |
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35 ** |
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36 ** |
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37 ** |
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38 ** $QT_END_LICENSE$ |
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39 ** |
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40 ****************************************************************************/ |
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41 #include <qlibrary.h> |
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42 #include <qdebug.h> |
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43 #include <private/qgl_p.h> |
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44 #include <private/qt_x11_p.h> |
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45 #include <private/qpaintengine_opengl_p.h> |
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46 |
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47 #include <qx11info_x11.h> |
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48 #include <GL/glx.h> |
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49 #include <qimage.h> |
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50 |
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51 #include "qglpixelbuffer.h" |
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52 #include "qglpixelbuffer_p.h" |
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53 |
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54 #if defined(Q_OS_LINUX) || defined(Q_OS_BSD4) |
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55 #include <dlfcn.h> |
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56 #endif |
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57 |
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58 QT_BEGIN_NAMESPACE |
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59 |
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60 #ifndef GLX_VERSION_1_3 |
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61 #define GLX_RGBA_BIT 0x00000002 |
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62 #define GLX_PBUFFER_BIT 0x00000004 |
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63 #define GLX_DRAWABLE_TYPE 0x8010 |
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64 #define GLX_RENDER_TYPE 0x8011 |
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65 #define GLX_RGBA_TYPE 0x8014 |
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66 #define GLX_PBUFFER_HEIGHT 0x8040 |
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67 #define GLX_PBUFFER_WIDTH 0x8041 |
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68 #endif |
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69 |
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70 #ifndef GLX_ARB_multisample |
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71 #define GLX_SAMPLE_BUFFERS_ARB 100000 |
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72 #define GLX_SAMPLES_ARB 100001 |
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73 #endif |
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74 |
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75 typedef GLXFBConfig* (*_glXChooseFBConfig) (Display *dpy, int screen, const int *attrib_list, int *nelements); |
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76 typedef int (*_glXGetFBConfigAttrib) (Display *dpy, GLXFBConfig config, int attribute, int *value); |
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77 typedef GLXPbuffer (*_glXCreatePbuffer) (Display *dpy, GLXFBConfig config, const int *attrib_list); |
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78 typedef void (*_glXDestroyPbuffer) (Display *dpy, GLXPbuffer pbuf); |
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79 typedef GLXContext (*_glXCreateNewContext) (Display *dpy, GLXFBConfig config, int render_type, GLXContext share_list, Bool direct); |
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80 typedef Bool (*_glXMakeContextCurrent) (Display *dpy, GLXDrawable draw, GLXDrawable read, GLXContext ctx); |
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81 |
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82 static _glXChooseFBConfig qt_glXChooseFBConfig = 0; |
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83 static _glXCreateNewContext qt_glXCreateNewContext = 0; |
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84 static _glXCreatePbuffer qt_glXCreatePbuffer = 0; |
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85 static _glXDestroyPbuffer qt_glXDestroyPbuffer = 0; |
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86 static _glXGetFBConfigAttrib qt_glXGetFBConfigAttrib = 0; |
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87 static _glXMakeContextCurrent qt_glXMakeContextCurrent = 0; |
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88 |
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89 #define glXChooseFBConfig qt_glXChooseFBConfig |
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90 #define glXCreateNewContext qt_glXCreateNewContext |
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91 #define glXCreatePbuffer qt_glXCreatePbuffer |
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92 #define glXDestroyPbuffer qt_glXDestroyPbuffer |
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93 #define glXGetFBConfigAttrib qt_glXGetFBConfigAttrib |
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94 #define glXMakeContextCurrent qt_glXMakeContextCurrent |
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95 |
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96 extern void* qglx_getProcAddress(const char* procName); // in qgl_x11.cpp |
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97 |
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98 static bool qt_resolve_pbuffer_extensions() |
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99 { |
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100 static int resolved = false; |
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101 if (resolved && qt_glXMakeContextCurrent) |
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102 return true; |
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103 else if (resolved) |
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104 return false; |
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105 |
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106 qt_glXChooseFBConfig = (_glXChooseFBConfig) qglx_getProcAddress("glXChooseFBConfig"); |
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107 qt_glXCreateNewContext = (_glXCreateNewContext) qglx_getProcAddress("glXCreateNewContext"); |
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108 qt_glXCreatePbuffer = (_glXCreatePbuffer) qglx_getProcAddress("glXCreatePbuffer"); |
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109 qt_glXDestroyPbuffer = (_glXDestroyPbuffer) qglx_getProcAddress("glXDestroyPbuffer"); |
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110 qt_glXGetFBConfigAttrib = (_glXGetFBConfigAttrib) qglx_getProcAddress("glXGetFBConfigAttrib"); |
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111 qt_glXMakeContextCurrent = (_glXMakeContextCurrent) qglx_getProcAddress("glXMakeContextCurrent"); |
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112 |
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113 resolved = qt_glXMakeContextCurrent ? true : false; |
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114 return resolved; |
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115 } |
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116 |
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117 static void qt_format_to_attrib_list(const QGLFormat &f, int attribs[]) |
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118 { |
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119 int i = 0; |
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120 attribs[i++] = GLX_RENDER_TYPE; |
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121 attribs[i++] = GLX_RGBA_BIT; |
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122 attribs[i++] = GLX_DRAWABLE_TYPE; |
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123 attribs[i++] = GLX_PBUFFER_BIT; |
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124 attribs[i++] = GLX_RED_SIZE; |
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125 attribs[i++] = f.redBufferSize() == -1 ? 1 : f.redBufferSize(); |
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126 attribs[i++] = GLX_GREEN_SIZE; |
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127 attribs[i++] = f.greenBufferSize() == -1 ? 1 : f.greenBufferSize(); |
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128 attribs[i++] = GLX_BLUE_SIZE; |
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129 attribs[i++] = f.blueBufferSize() == -1 ? 1 : f.blueBufferSize(); |
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130 if (f.doubleBuffer()) { |
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131 attribs[i++] = GLX_DOUBLEBUFFER; |
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132 attribs[i++] = true; |
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133 } |
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134 if (f.depth()) { |
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135 attribs[i++] = GLX_DEPTH_SIZE; |
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136 attribs[i++] = f.depthBufferSize() == -1 ? 1 : f.depthBufferSize(); |
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137 } |
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138 if (f.stereo()) { |
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139 attribs[i++] = GLX_STEREO; |
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140 attribs[i++] = true; |
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141 } |
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142 if (f.stencil()) { |
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143 attribs[i++] = GLX_STENCIL_SIZE; |
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144 attribs[i++] = f.stencilBufferSize() == -1 ? 1 : f.stencilBufferSize(); |
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145 } |
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146 if (f.alpha()) { |
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147 attribs[i++] = GLX_ALPHA_SIZE; |
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148 attribs[i++] = f.alphaBufferSize() == -1 ? 1 : f.alphaBufferSize(); |
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149 } |
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150 if (f.accum()) { |
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151 attribs[i++] = GLX_ACCUM_RED_SIZE; |
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152 attribs[i++] = f.accumBufferSize() == -1 ? 1 : f.accumBufferSize(); |
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153 attribs[i++] = GLX_ACCUM_GREEN_SIZE; |
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154 attribs[i++] = f.accumBufferSize() == -1 ? 1 : f.accumBufferSize(); |
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155 attribs[i++] = GLX_ACCUM_BLUE_SIZE; |
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156 attribs[i++] = f.accumBufferSize() == -1 ? 1 : f.accumBufferSize(); |
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157 if (f.alpha()) { |
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158 attribs[i++] = GLX_ACCUM_ALPHA_SIZE; |
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159 attribs[i++] = f.accumBufferSize() == -1 ? 1 : f.accumBufferSize(); |
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160 } |
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161 } |
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162 if (f.sampleBuffers()) { |
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163 attribs[i++] = GLX_SAMPLE_BUFFERS_ARB; |
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164 attribs[i++] = 1; |
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165 attribs[i++] = GLX_SAMPLES_ARB; |
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166 attribs[i++] = f.samples() == -1 ? 4 : f.samples(); |
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167 } |
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168 |
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169 attribs[i] = XNone; |
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170 } |
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171 |
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172 bool QGLPixelBufferPrivate::init(const QSize &size, const QGLFormat &f, QGLWidget *shareWidget) |
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173 { |
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174 if (!qt_resolve_pbuffer_extensions()) { |
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175 qWarning("QGLPixelBuffer: pbuffers are not supported on this system."); |
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176 return false; |
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177 } |
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178 |
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179 int attribs[40]; |
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180 int num_configs = 0; |
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181 |
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182 qt_format_to_attrib_list(f, attribs); |
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183 |
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184 GLXFBConfig *configs = glXChooseFBConfig(X11->display, X11->defaultScreen, attribs, &num_configs); |
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185 if (configs && num_configs) { |
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186 int res; |
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187 glXGetFBConfigAttrib(X11->display, configs[0], GLX_LEVEL, &res); |
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188 format.setPlane(res); |
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189 glXGetFBConfigAttrib(X11->display, configs[0], GLX_DOUBLEBUFFER, &res); |
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190 format.setDoubleBuffer(res); |
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191 glXGetFBConfigAttrib(X11->display, configs[0], GLX_DEPTH_SIZE, &res); |
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192 format.setDepth(res); |
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193 if (format.depth()) |
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194 format.setDepthBufferSize(res); |
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195 glXGetFBConfigAttrib(X11->display, configs[0], GLX_RGBA, &res); |
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196 format.setRgba(res); |
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197 glXGetFBConfigAttrib(X11->display, configs[0], GLX_RED_SIZE, &res); |
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198 format.setRedBufferSize(res); |
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199 glXGetFBConfigAttrib(X11->display, configs[0], GLX_GREEN_SIZE, &res); |
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200 format.setGreenBufferSize(res); |
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201 glXGetFBConfigAttrib(X11->display, configs[0], GLX_BLUE_SIZE, &res); |
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202 format.setBlueBufferSize(res); |
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203 glXGetFBConfigAttrib(X11->display, configs[0], GLX_ALPHA_SIZE, &res); |
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204 format.setAlpha(res); |
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205 if (format.alpha()) |
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206 format.setAlphaBufferSize(res); |
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207 glXGetFBConfigAttrib(X11->display, configs[0], GLX_ACCUM_RED_SIZE, &res); |
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208 format.setAccum(res); |
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209 if (format.accum()) |
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210 format.setAccumBufferSize(res); |
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211 glXGetFBConfigAttrib(X11->display, configs[0], GLX_STENCIL_SIZE, &res); |
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212 format.setStencil(res); |
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213 if (format.stencil()) |
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214 format.setStencilBufferSize(res); |
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215 glXGetFBConfigAttrib(X11->display, configs[0], GLX_STEREO, &res); |
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216 format.setStereo(res); |
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217 glXGetFBConfigAttrib(X11->display, configs[0], GLX_SAMPLE_BUFFERS_ARB, &res); |
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218 format.setSampleBuffers(res); |
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219 if (format.sampleBuffers()) { |
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220 glXGetFBConfigAttrib(X11->display, configs[0], GLX_SAMPLES_ARB, &res); |
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221 format.setSamples(res); |
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222 } |
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223 |
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224 int pb_attribs[] = {GLX_PBUFFER_WIDTH, size.width(), GLX_PBUFFER_HEIGHT, size.height(), XNone}; |
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225 GLXContext shareContext = 0; |
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226 if (shareWidget && shareWidget->d_func()->glcx) |
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227 shareContext = (GLXContext) shareWidget->d_func()->glcx->d_func()->cx; |
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228 |
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229 pbuf = glXCreatePbuffer(QX11Info::display(), configs[0], pb_attribs); |
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230 ctx = glXCreateNewContext(QX11Info::display(), configs[0], GLX_RGBA_TYPE, shareContext, true); |
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231 |
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232 XFree(configs); |
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233 if (!pbuf || !ctx) { |
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234 qWarning("QGLPixelBuffer: Unable to create a pbuffer/context - giving up."); |
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235 return false; |
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236 } |
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237 return true; |
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238 } else { |
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239 qWarning("QGLPixelBuffer: Unable to find a context/format match - giving up."); |
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240 return false; |
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241 } |
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242 } |
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243 |
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244 bool QGLPixelBufferPrivate::cleanup() |
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245 { |
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246 glXDestroyPbuffer(QX11Info::display(), pbuf); |
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247 return true; |
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248 } |
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249 |
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250 bool QGLPixelBuffer::bindToDynamicTexture(GLuint) |
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251 { |
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252 return false; |
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253 } |
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254 |
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255 void QGLPixelBuffer::releaseFromDynamicTexture() |
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256 { |
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257 } |
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258 |
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259 bool QGLPixelBuffer::hasOpenGLPbuffers() |
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260 { |
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261 bool ret = qt_resolve_pbuffer_extensions(); |
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262 |
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263 if (!ret) |
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264 return false; |
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265 |
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266 int attribs[40]; |
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267 int num_configs = 0; |
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268 |
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269 qt_format_to_attrib_list(QGLFormat::defaultFormat(), attribs); |
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270 |
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271 GLXFBConfig *configs = glXChooseFBConfig(X11->display, X11->defaultScreen, attribs, &num_configs); |
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272 GLXPbuffer pbuf = 0; |
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273 GLXContext ctx = 0; |
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274 |
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275 if (configs && num_configs) { |
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276 int pb_attribs[] = {GLX_PBUFFER_WIDTH, 128, GLX_PBUFFER_HEIGHT, 128, XNone}; |
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277 pbuf = glXCreatePbuffer(X11->display, configs[0], pb_attribs); |
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278 ctx = glXCreateNewContext(X11->display, configs[0], GLX_RGBA_TYPE, 0, true); |
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279 XFree(configs); |
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280 glXDestroyContext(X11->display, ctx); |
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281 glXDestroyPbuffer(X11->display, pbuf); |
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282 } |
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283 return pbuf && ctx; |
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284 } |
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285 |
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286 QT_END_NAMESPACE |