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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 |
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42 #include <qglpixelbuffer.h> |
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43 #include <qgl.h> |
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44 #include <private/qgl_p.h> |
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45 |
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46 #include <private/qglpixelbuffer_p.h> |
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47 |
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48 #include <qimage.h> |
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49 #include <qdebug.h> |
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50 |
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51 QT_BEGIN_NAMESPACE |
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52 |
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53 /* WGL_WGLEXT_PROTOTYPES */ |
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54 typedef const char * (WINAPI * PFNWGLGETEXTENSIONSSTRINGARBPROC) (HDC hdc); |
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55 typedef HPBUFFERARB (WINAPI * PFNWGLCREATEPBUFFERARBPROC) (HDC hDC, int iPixelFormat, int iWidth, int iHeight, const int *piAttribList); |
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56 typedef HDC (WINAPI * PFNWGLGETPBUFFERDCARBPROC) (HPBUFFERARB hPbuffer); |
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57 typedef int (WINAPI * PFNWGLRELEASEPBUFFERDCARBPROC) (HPBUFFERARB hPbuffer, HDC hDC); |
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58 typedef BOOL (WINAPI * PFNWGLDESTROYPBUFFERARBPROC) (HPBUFFERARB hPbuffer); |
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59 typedef BOOL (WINAPI * PFNWGLQUERYPBUFFERARBPROC) (HPBUFFERARB hPbuffer, int iAttribute, int *piValue); |
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60 typedef BOOL (WINAPI * PFNWGLGETPIXELFORMATATTRIBIVARBPROC) (HDC hdc, int iPixelFormat, int iLayerPlane, UINT nAttributes, const int *piAttributes, int *piValues); |
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61 typedef BOOL (WINAPI * PFNWGLGETPIXELFORMATATTRIBFVARBPROC) (HDC hdc, int iPixelFormat, int iLayerPlane, UINT nAttributes, const int *piAttributes, FLOAT *pfValues); |
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62 typedef BOOL (WINAPI * PFNWGLCHOOSEPIXELFORMATARBPROC) (HDC hdc, const int *piAttribIList, const FLOAT *pfAttribFList, UINT nMaxFormats, int *piFormats, UINT *nNumFormats); |
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63 typedef BOOL (WINAPI * PFNWGLBINDTEXIMAGEARBPROC) (HPBUFFERARB hPbuffer, int iBuffer); |
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64 typedef BOOL (WINAPI * PFNWGLRELEASETEXIMAGEARBPROC) (HPBUFFERARB hPbuffer, int iBuffer); |
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65 typedef BOOL (WINAPI * PFNWGLSETPBUFFERATTRIBARBPROC) (HPBUFFERARB hPbuffer, const int * piAttribList); |
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66 |
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67 #ifndef WGL_ARB_pbuffer |
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68 #define WGL_DRAW_TO_PBUFFER_ARB 0x202D |
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69 #define WGL_MAX_PBUFFER_PIXELS_ARB 0x202E |
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70 #define WGL_MAX_PBUFFER_WIDTH_ARB 0x202F |
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71 #define WGL_MAX_PBUFFER_HEIGHT_ARB 0x2030 |
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72 #define WGL_PBUFFER_LARGEST_ARB 0x2033 |
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73 #define WGL_PBUFFER_WIDTH_ARB 0x2034 |
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74 #define WGL_PBUFFER_HEIGHT_ARB 0x2035 |
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75 #define WGL_PBUFFER_LOST_ARB 0x2036 |
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76 #endif |
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77 |
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78 #ifndef WGL_ARB_pixel_format |
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79 #define WGL_NUMBER_PIXEL_FORMATS_ARB 0x2000 |
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80 #define WGL_DRAW_TO_WINDOW_ARB 0x2001 |
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81 #define WGL_DRAW_TO_BITMAP_ARB 0x2002 |
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82 #define WGL_ACCELERATION_ARB 0x2003 |
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83 #define WGL_NEED_PALETTE_ARB 0x2004 |
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84 #define WGL_NEED_SYSTEM_PALETTE_ARB 0x2005 |
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85 #define WGL_SWAP_LAYER_BUFFERS_ARB 0x2006 |
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86 #define WGL_SWAP_METHOD_ARB 0x2007 |
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87 #define WGL_NUMBER_OVERLAYS_ARB 0x2008 |
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88 #define WGL_NUMBER_UNDERLAYS_ARB 0x2009 |
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89 #define WGL_TRANSPARENT_ARB 0x200A |
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90 #define WGL_TRANSPARENT_RED_VALUE_ARB 0x2037 |
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91 #define WGL_TRANSPARENT_GREEN_VALUE_ARB 0x2038 |
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92 #define WGL_TRANSPARENT_BLUE_VALUE_ARB 0x2039 |
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93 #define WGL_TRANSPARENT_ALPHA_VALUE_ARB 0x203A |
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94 #define WGL_TRANSPARENT_INDEX_VALUE_ARB 0x203B |
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95 #define WGL_SHARE_DEPTH_ARB 0x200C |
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96 #define WGL_SHARE_STENCIL_ARB 0x200D |
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97 #define WGL_SHARE_ACCUM_ARB 0x200E |
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98 #define WGL_SUPPORT_GDI_ARB 0x200F |
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99 #define WGL_SUPPORT_OPENGL_ARB 0x2010 |
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100 #define WGL_DOUBLE_BUFFER_ARB 0x2011 |
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101 #define WGL_STEREO_ARB 0x2012 |
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102 #define WGL_PIXEL_TYPE_ARB 0x2013 |
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103 #define WGL_COLOR_BITS_ARB 0x2014 |
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104 #define WGL_RED_BITS_ARB 0x2015 |
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105 #define WGL_RED_SHIFT_ARB 0x2016 |
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106 #define WGL_GREEN_BITS_ARB 0x2017 |
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107 #define WGL_GREEN_SHIFT_ARB 0x2018 |
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108 #define WGL_BLUE_BITS_ARB 0x2019 |
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109 #define WGL_BLUE_SHIFT_ARB 0x201A |
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110 #define WGL_ALPHA_BITS_ARB 0x201B |
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111 #define WGL_ALPHA_SHIFT_ARB 0x201C |
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112 #define WGL_ACCUM_BITS_ARB 0x201D |
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113 #define WGL_ACCUM_RED_BITS_ARB 0x201E |
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114 #define WGL_ACCUM_GREEN_BITS_ARB 0x201F |
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115 #define WGL_ACCUM_BLUE_BITS_ARB 0x2020 |
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116 #define WGL_ACCUM_ALPHA_BITS_ARB 0x2021 |
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117 #define WGL_DEPTH_BITS_ARB 0x2022 |
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118 #define WGL_STENCIL_BITS_ARB 0x2023 |
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119 #define WGL_AUX_BUFFERS_ARB 0x2024 |
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120 #define WGL_NO_ACCELERATION_ARB 0x2025 |
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121 #define WGL_GENERIC_ACCELERATION_ARB 0x2026 |
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122 #define WGL_FULL_ACCELERATION_ARB 0x2027 |
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123 #define WGL_SWAP_EXCHANGE_ARB 0x2028 |
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124 #define WGL_SWAP_COPY_ARB 0x2029 |
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125 #define WGL_SWAP_UNDEFINED_ARB 0x202A |
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126 #define WGL_TYPE_RGBA_ARB 0x202B |
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127 #define WGL_TYPE_COLORINDEX_ARB 0x202C |
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128 #endif |
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129 |
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130 #ifndef WGL_ARB_render_texture |
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131 #define WGL_BIND_TO_TEXTURE_RGB_ARB 0x2070 |
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132 #define WGL_BIND_TO_TEXTURE_RGBA_ARB 0x2071 |
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133 #define WGL_TEXTURE_FORMAT_ARB 0x2072 |
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134 #define WGL_TEXTURE_TARGET_ARB 0x2073 |
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135 #define WGL_MIPMAP_TEXTURE_ARB 0x2074 |
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136 #define WGL_TEXTURE_RGB_ARB 0x2075 |
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137 #define WGL_TEXTURE_RGBA_ARB 0x2076 |
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138 #define WGL_NO_TEXTURE_ARB 0x2077 |
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139 #define WGL_TEXTURE_CUBE_MAP_ARB 0x2078 |
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140 #define WGL_TEXTURE_1D_ARB 0x2079 |
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141 #define WGL_TEXTURE_2D_ARB 0x207A |
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142 #define WGL_MIPMAP_LEVEL_ARB 0x207B |
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143 #define WGL_CUBE_MAP_FACE_ARB 0x207C |
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144 #define WGL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB 0x207D |
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145 #define WGL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB 0x207E |
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146 #define WGL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB 0x207F |
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147 #define WGL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB 0x2080 |
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148 #define WGL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB 0x2081 |
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149 #define WGL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB 0x2082 |
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150 #define WGL_FRONT_LEFT_ARB 0x2083 |
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151 #define WGL_FRONT_RIGHT_ARB 0x2084 |
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152 #define WGL_BACK_LEFT_ARB 0x2085 |
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153 #define WGL_BACK_RIGHT_ARB 0x2086 |
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154 #define WGL_AUX0_ARB 0x2087 |
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155 #define WGL_AUX1_ARB 0x2088 |
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156 #define WGL_AUX2_ARB 0x2089 |
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157 #define WGL_AUX3_ARB 0x208A |
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158 #define WGL_AUX4_ARB 0x208B |
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159 #define WGL_AUX5_ARB 0x208C |
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160 #define WGL_AUX6_ARB 0x208D |
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161 #define WGL_AUX7_ARB 0x208E |
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162 #define WGL_AUX8_ARB 0x208F |
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163 #define WGL_AUX9_ARB 0x2090 |
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164 #endif |
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165 |
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166 #ifndef WGL_FLOAT_COMPONENTS_NV |
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167 #define WGL_FLOAT_COMPONENTS_NV 0x20B0 |
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168 #endif |
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169 |
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170 QGLFormat pfiToQGLFormat(HDC hdc, int pfi); |
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171 |
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172 static void qt_format_to_attrib_list(bool has_render_texture, const QGLFormat &f, int attribs[]) |
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173 { |
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174 int i = 0; |
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175 attribs[i++] = WGL_SUPPORT_OPENGL_ARB; |
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176 attribs[i++] = TRUE; |
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177 attribs[i++] = WGL_DRAW_TO_PBUFFER_ARB; |
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178 attribs[i++] = TRUE; |
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179 |
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180 if (has_render_texture) { |
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181 attribs[i++] = WGL_BIND_TO_TEXTURE_RGBA_ARB; |
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182 attribs[i++] = TRUE; |
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183 } |
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184 |
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185 attribs[i++] = WGL_COLOR_BITS_ARB; |
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186 attribs[i++] = 32; |
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187 attribs[i++] = WGL_DOUBLE_BUFFER_ARB; |
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188 attribs[i++] = FALSE; |
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189 |
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190 if (f.stereo()) { |
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191 attribs[i++] = WGL_STEREO_ARB; |
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192 attribs[i++] = TRUE; |
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193 } |
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194 if (f.depth()) { |
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195 attribs[i++] = WGL_DEPTH_BITS_ARB; |
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196 attribs[i++] = f.depthBufferSize() == -1 ? 24 : f.depthBufferSize(); |
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197 } |
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198 if (f.redBufferSize() != -1) { |
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199 attribs[i++] = WGL_RED_BITS_ARB; |
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200 attribs[i++] = f.redBufferSize(); |
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201 } |
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202 if (f.greenBufferSize() != -1) { |
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203 attribs[i++] = WGL_GREEN_BITS_ARB; |
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204 attribs[i++] = f.greenBufferSize(); |
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205 } |
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206 if (f.blueBufferSize() != -1) { |
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207 attribs[i++] = WGL_BLUE_BITS_ARB; |
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208 attribs[i++] = f.blueBufferSize(); |
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209 } |
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210 if (f.alpha()) { |
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211 attribs[i++] = WGL_ALPHA_BITS_ARB; |
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212 attribs[i++] = f.alphaBufferSize() == -1 ? 8 : f.alphaBufferSize(); |
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213 } |
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214 if (f.accum()) { |
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215 attribs[i++] = WGL_ACCUM_BITS_ARB; |
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216 attribs[i++] = f.accumBufferSize() == -1 ? 16 : f.accumBufferSize(); |
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217 } |
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218 if (f.stencil()) { |
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219 attribs[i++] = WGL_STENCIL_BITS_ARB; |
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220 attribs[i++] = f.stencilBufferSize() == -1 ? 8 : f.stencilBufferSize(); |
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221 } |
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222 if ((f.redBufferSize() > 8 || f.greenBufferSize() > 8 |
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223 || f.blueBufferSize() > 8 || f.alphaBufferSize() > 8) |
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224 && (QGLExtensions::glExtensions & QGLExtensions::NVFloatBuffer)) |
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225 { |
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226 attribs[i++] = WGL_FLOAT_COMPONENTS_NV; |
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227 attribs[i++] = TRUE; |
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228 } |
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229 // sample buffers doesn't work in conjunction with the render_texture extension |
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230 // so igonre that for now |
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231 // if (f.sampleBuffers()) { |
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232 // attribs[i++] = WGL_SAMPLE_BUFFERS_ARB; |
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233 // attribs[i++] = 1; |
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234 // attribs[i++] = WGL_SAMPLES_ARB; |
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235 // attribs[i++] = f.samples() == -1 ? 16 : f.samples(); |
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236 // } |
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237 attribs[i] = 0; |
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238 } |
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239 |
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240 bool QGLPixelBufferPrivate::init(const QSize &size, const QGLFormat &f, QGLWidget *shareWidget) |
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241 { |
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242 QGLWidget dmy; |
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243 dmy.makeCurrent(); // needed for wglGetProcAddress() to succeed |
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244 |
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245 PFNWGLCREATEPBUFFERARBPROC wglCreatePbufferARB = |
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246 (PFNWGLCREATEPBUFFERARBPROC) wglGetProcAddress("wglCreatePbufferARB"); |
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247 PFNWGLGETPBUFFERDCARBPROC wglGetPbufferDCARB = |
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248 (PFNWGLGETPBUFFERDCARBPROC) wglGetProcAddress("wglGetPbufferDCARB"); |
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249 PFNWGLQUERYPBUFFERARBPROC wglQueryPbufferARB = |
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250 (PFNWGLQUERYPBUFFERARBPROC) wglGetProcAddress("wglQueryPbufferARB"); |
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251 PFNWGLCHOOSEPIXELFORMATARBPROC wglChoosePixelFormatARB = |
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252 (PFNWGLCHOOSEPIXELFORMATARBPROC) wglGetProcAddress("wglChoosePixelFormatARB"); |
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253 |
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254 if (!wglCreatePbufferARB) // assumes that if one can be resolved, all of them can |
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255 return false; |
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256 |
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257 dc = GetDC(dmy.winId()); |
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258 Q_ASSERT(dc); |
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259 |
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260 PFNWGLGETEXTENSIONSSTRINGARBPROC wglGetExtensionsStringARB = |
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261 (PFNWGLGETEXTENSIONSSTRINGARBPROC) wglGetProcAddress("wglGetExtensionsStringARB"); |
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262 |
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263 if (wglGetExtensionsStringARB) { |
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264 QString extensions(QLatin1String(wglGetExtensionsStringARB(dc))); |
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265 has_render_texture = extensions.contains(QLatin1String("WGL_ARB_render_texture")); |
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266 } |
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267 |
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268 int attribs[40]; |
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269 qt_format_to_attrib_list(has_render_texture, f, attribs); |
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270 |
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271 // Find pbuffer capable pixel format. |
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272 unsigned int num_formats = 0; |
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273 int pixel_format; |
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274 wglChoosePixelFormatARB(dc, attribs, 0, 1, &pixel_format, &num_formats); |
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275 |
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276 // some GL implementations don't support pbuffers with accum |
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277 // buffers, so try that before we give up |
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278 if (num_formats == 0 && f.accum()) { |
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279 QGLFormat tmp = f; |
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280 tmp.setAccum(false); |
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281 qt_format_to_attrib_list(has_render_texture, tmp, attribs); |
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282 wglChoosePixelFormatARB(dc, attribs, 0, 1, &pixel_format, &num_formats); |
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283 } |
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284 |
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285 if (num_formats == 0) { |
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286 qWarning("QGLPixelBuffer: Unable to find a pixel format with pbuffer - giving up."); |
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287 ReleaseDC(dmy.winId(), dc); |
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288 return false; |
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289 } |
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290 format = pfiToQGLFormat(dc, pixel_format); |
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291 |
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292 // NB! The below ONLY works if the width/height are powers of 2. |
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293 // Set some pBuffer attributes so that we can use this pBuffer as |
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294 // a 2D RGBA texture target. |
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295 int pb_attribs[] = {WGL_TEXTURE_FORMAT_ARB, WGL_TEXTURE_RGBA_ARB, |
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296 WGL_TEXTURE_TARGET_ARB, WGL_TEXTURE_2D_ARB, 0}; |
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297 |
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298 pbuf = wglCreatePbufferARB(dc, pixel_format, size.width(), size.height(), |
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299 has_render_texture ? pb_attribs : 0); |
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300 if(!pbuf) { |
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301 // try again without the render_texture extension |
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302 pbuf = wglCreatePbufferARB(dc, pixel_format, size.width(), size.height(), 0); |
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303 has_render_texture = false; |
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304 if (!pbuf) { |
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305 qWarning("QGLPixelBuffer: Unable to create pbuffer [w=%d, h=%d] - giving up.", size.width(), size.height()); |
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306 ReleaseDC(dmy.winId(), dc); |
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307 return false; |
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308 } |
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309 } |
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310 |
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311 ReleaseDC(dmy.winId(), dc); |
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312 dc = wglGetPbufferDCARB(pbuf); |
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313 ctx = wglCreateContext(dc); |
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314 |
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315 if (!dc || !ctx) { |
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316 qWarning("QGLPixelBuffer: Unable to create pbuffer context - giving up."); |
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317 return false; |
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318 } |
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319 |
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320 HGLRC share_ctx = shareWidget ? shareWidget->d_func()->glcx->d_func()->rc : 0; |
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321 if (share_ctx && !wglShareLists(share_ctx, ctx)) |
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322 qWarning("QGLPixelBuffer: Unable to share display lists - with share widget."); |
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323 |
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324 int width, height; |
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325 wglQueryPbufferARB(pbuf, WGL_PBUFFER_WIDTH_ARB, &width); |
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326 wglQueryPbufferARB(pbuf, WGL_PBUFFER_HEIGHT_ARB, &height); |
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327 return true; |
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328 } |
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329 |
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330 bool QGLPixelBufferPrivate::cleanup() |
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331 { |
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332 PFNWGLRELEASEPBUFFERDCARBPROC wglReleasePbufferDCARB = |
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333 (PFNWGLRELEASEPBUFFERDCARBPROC) wglGetProcAddress("wglReleasePbufferDCARB"); |
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334 PFNWGLDESTROYPBUFFERARBPROC wglDestroyPbufferARB = |
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335 (PFNWGLDESTROYPBUFFERARBPROC) wglGetProcAddress("wglDestroyPbufferARB"); |
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336 if (!invalid && wglReleasePbufferDCARB && wglDestroyPbufferARB) { |
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337 wglReleasePbufferDCARB(pbuf, dc); |
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338 wglDestroyPbufferARB(pbuf); |
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339 } |
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340 return true; |
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341 } |
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342 |
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343 bool QGLPixelBuffer::bindToDynamicTexture(GLuint texture_id) |
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344 { |
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345 Q_D(QGLPixelBuffer); |
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346 if (d->invalid || !d->has_render_texture) |
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347 return false; |
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348 PFNWGLBINDTEXIMAGEARBPROC wglBindTexImageARB = |
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349 (PFNWGLBINDTEXIMAGEARBPROC) wglGetProcAddress("wglBindTexImageARB"); |
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350 if (wglBindTexImageARB) { |
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351 glBindTexture(GL_TEXTURE_2D, texture_id); |
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352 return wglBindTexImageARB(d->pbuf, WGL_FRONT_LEFT_ARB); |
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353 } |
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354 return false; |
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355 } |
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356 |
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357 void QGLPixelBuffer::releaseFromDynamicTexture() |
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358 { |
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359 Q_D(QGLPixelBuffer); |
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360 if (d->invalid || !d->has_render_texture) |
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361 return; |
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362 PFNWGLRELEASETEXIMAGEARBPROC wglReleaseTexImageARB = |
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363 (PFNWGLRELEASETEXIMAGEARBPROC) wglGetProcAddress("wglReleaseTexImageARB"); |
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364 if (wglReleaseTexImageARB) |
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365 wglReleaseTexImageARB(d->pbuf, WGL_FRONT_LEFT_ARB); |
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366 } |
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367 |
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368 bool QGLPixelBuffer::hasOpenGLPbuffers() |
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369 { |
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370 bool ret = false; |
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371 QGLWidget *dmy = 0; |
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372 if (!QGLContext::currentContext()) { |
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373 dmy = new QGLWidget; |
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374 dmy->makeCurrent(); |
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375 } |
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376 PFNWGLGETEXTENSIONSSTRINGARBPROC wglGetExtensionsStringARB = |
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377 (PFNWGLGETEXTENSIONSSTRINGARBPROC) wglGetProcAddress("wglGetExtensionsStringARB"); |
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378 if (wglGetExtensionsStringARB) { |
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379 QString extensions(QLatin1String(wglGetExtensionsStringARB(wglGetCurrentDC()))); |
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380 if (extensions.contains(QLatin1String("WGL_ARB_pbuffer")) |
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381 && extensions.contains(QLatin1String("WGL_ARB_pixel_format"))) { |
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382 ret = true; |
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383 } |
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384 } |
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385 if (dmy) |
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386 delete dmy; |
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387 return ret; |
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388 } |
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389 |
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390 QT_END_NAMESPACE |