[1] | 1 | #include "OgreRoot.h" |
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| 2 | #include "OgreException.h" |
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| 3 | #include "OgreLogManager.h" |
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| 4 | #include "OgreStringConverter.h" |
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| 5 | |
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| 6 | #include <algorithm> |
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| 7 | |
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| 8 | #include "OgreWin32GLSupport.h" |
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| 9 | #include "OgreGLTexture.h" |
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| 10 | #include "OgreWin32Window.h" |
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| 11 | #include <GL/wglext.h> |
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| 12 | #include "OgreWin32RenderTexture.h" |
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| 13 | |
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| 14 | using namespace Ogre; |
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| 15 | |
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| 16 | GLenum wglewContextInit (Ogre::GLSupport *glSupport); |
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| 17 | |
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| 18 | namespace Ogre { |
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| 19 | Win32GLSupport::Win32GLSupport() |
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| 20 | : mInitialWindow(0) |
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| 21 | , mHasPixelFormatARB(false) |
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| 22 | , mHasMultisample(false) |
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| 23 | { |
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| 24 | // immediately test WGL_ARB_pixel_format and FSAA support |
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| 25 | // so we can set configuration options appropriately |
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| 26 | initialiseWGL(); |
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| 27 | } |
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| 28 | |
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| 29 | template<class C> void remove_duplicates(C& c) |
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| 30 | { |
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| 31 | std::sort(c.begin(), c.end()); |
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| 32 | typename C::iterator p = std::unique(c.begin(), c.end()); |
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| 33 | c.erase(p, c.end()); |
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| 34 | } |
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| 35 | |
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| 36 | void Win32GLSupport::addConfig() |
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| 37 | { |
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| 38 | //TODO: EnumDisplayDevices http://msdn.microsoft.com/library/en-us/gdi/devcons_2303.asp |
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| 39 | /*vector<string> DisplayDevices; |
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| 40 | DISPLAY_DEVICE DisplayDevice; |
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| 41 | DisplayDevice.cb = sizeof(DISPLAY_DEVICE); |
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| 42 | DWORD i=0; |
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| 43 | while (EnumDisplayDevices(NULL, i++, &DisplayDevice, 0) { |
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| 44 | DisplayDevices.push_back(DisplayDevice.DeviceName); |
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| 45 | }*/ |
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| 46 | |
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| 47 | ConfigOption optFullScreen; |
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| 48 | ConfigOption optVideoMode; |
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| 49 | ConfigOption optColourDepth; |
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| 50 | ConfigOption optDisplayFrequency; |
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| 51 | ConfigOption optVSync; |
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| 52 | ConfigOption optFSAA; |
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| 53 | ConfigOption optRTTMode; |
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| 54 | |
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| 55 | // FS setting possiblities |
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| 56 | optFullScreen.name = "Full Screen"; |
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| 57 | optFullScreen.possibleValues.push_back("Yes"); |
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| 58 | optFullScreen.possibleValues.push_back("No"); |
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| 59 | optFullScreen.currentValue = "Yes"; |
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| 60 | optFullScreen.immutable = false; |
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| 61 | |
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| 62 | // Video mode possiblities |
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| 63 | DEVMODE DevMode; |
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| 64 | DevMode.dmSize = sizeof(DEVMODE); |
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| 65 | optVideoMode.name = "Video Mode"; |
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| 66 | optVideoMode.immutable = false; |
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| 67 | for (DWORD i = 0; EnumDisplaySettings(NULL, i, &DevMode); ++i) |
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| 68 | { |
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| 69 | if (DevMode.dmBitsPerPel < 16 || DevMode.dmPelsHeight < 480) |
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| 70 | continue; |
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| 71 | mDevModes.push_back(DevMode); |
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| 72 | StringUtil::StrStreamType str; |
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| 73 | str << DevMode.dmPelsWidth << " x " << DevMode.dmPelsHeight; |
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| 74 | optVideoMode.possibleValues.push_back(str.str()); |
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| 75 | } |
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| 76 | remove_duplicates(optVideoMode.possibleValues); |
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| 77 | optVideoMode.currentValue = optVideoMode.possibleValues.front(); |
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| 78 | |
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| 79 | optColourDepth.name = "Colour Depth"; |
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| 80 | optColourDepth.immutable = false; |
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| 81 | optColourDepth.currentValue.clear(); |
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| 82 | |
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| 83 | optDisplayFrequency.name = "Display Frequency"; |
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| 84 | optDisplayFrequency.immutable = false; |
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| 85 | optDisplayFrequency.currentValue.clear(); |
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| 86 | |
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| 87 | optVSync.name = "VSync"; |
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| 88 | optVSync.immutable = false; |
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| 89 | optVSync.possibleValues.push_back("No"); |
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| 90 | optVSync.possibleValues.push_back("Yes"); |
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| 91 | optVSync.currentValue = "No"; |
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| 92 | |
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| 93 | optFSAA.name = "FSAA"; |
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| 94 | optFSAA.immutable = false; |
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| 95 | optFSAA.possibleValues.push_back("0"); |
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| 96 | for (std::vector<int>::iterator it = mFSAALevels.begin(); it != mFSAALevels.end(); ++it) |
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| 97 | optFSAA.possibleValues.push_back(StringConverter::toString(*it)); |
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| 98 | optFSAA.currentValue = "0"; |
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| 99 | |
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| 100 | optRTTMode.name = "RTT Preferred Mode"; |
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| 101 | optRTTMode.possibleValues.push_back("FBO"); |
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| 102 | optRTTMode.possibleValues.push_back("PBuffer"); |
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| 103 | optRTTMode.possibleValues.push_back("Copy"); |
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| 104 | optRTTMode.currentValue = "FBO"; |
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| 105 | optRTTMode.immutable = false; |
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| 106 | |
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| 107 | |
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| 108 | mOptions[optFullScreen.name] = optFullScreen; |
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| 109 | mOptions[optVideoMode.name] = optVideoMode; |
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| 110 | mOptions[optColourDepth.name] = optColourDepth; |
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| 111 | mOptions[optDisplayFrequency.name] = optDisplayFrequency; |
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| 112 | mOptions[optVSync.name] = optVSync; |
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| 113 | mOptions[optFSAA.name] = optFSAA; |
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| 114 | mOptions[optRTTMode.name] = optRTTMode; |
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| 115 | |
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| 116 | refreshConfig(); |
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| 117 | } |
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| 118 | |
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| 119 | void Win32GLSupport::refreshConfig() |
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| 120 | { |
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| 121 | ConfigOptionMap::iterator optVideoMode = mOptions.find("Video Mode"); |
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| 122 | ConfigOptionMap::iterator moptColourDepth = mOptions.find("Colour Depth"); |
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| 123 | ConfigOptionMap::iterator moptDisplayFrequency = mOptions.find("Display Frequency"); |
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| 124 | if(optVideoMode == mOptions.end() || moptColourDepth == mOptions.end() || moptDisplayFrequency == mOptions.end()) |
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| 125 | OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, "Can't find mOptions!", "Win32GLSupport::refreshConfig"); |
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| 126 | ConfigOption* optColourDepth = &moptColourDepth->second; |
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| 127 | ConfigOption* optDisplayFrequency = &moptDisplayFrequency->second; |
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| 128 | |
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| 129 | const String& val = optVideoMode->second.currentValue; |
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| 130 | String::size_type pos = val.find('x'); |
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| 131 | if (pos == String::npos) |
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| 132 | OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, "Invalid Video Mode provided", "Win32GLSupport::refreshConfig"); |
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| 133 | DWORD width = StringConverter::parseUnsignedInt(val.substr(0, pos)); |
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| 134 | DWORD height = StringConverter::parseUnsignedInt(val.substr(pos+1, String::npos)); |
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| 135 | |
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| 136 | for(std::vector<DEVMODE>::const_iterator i = mDevModes.begin(); i != mDevModes.end(); ++i) |
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| 137 | { |
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| 138 | if (i->dmPelsWidth != width || i->dmPelsHeight != height) |
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| 139 | continue; |
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| 140 | optColourDepth->possibleValues.push_back(StringConverter::toString(i->dmBitsPerPel)); |
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| 141 | optDisplayFrequency->possibleValues.push_back(StringConverter::toString(i->dmDisplayFrequency)); |
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| 142 | } |
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| 143 | remove_duplicates(optColourDepth->possibleValues); |
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| 144 | remove_duplicates(optDisplayFrequency->possibleValues); |
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| 145 | optColourDepth->currentValue = optColourDepth->possibleValues.back(); |
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| 146 | if (optDisplayFrequency->currentValue != "N/A") |
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| 147 | optDisplayFrequency->currentValue = optDisplayFrequency->possibleValues.front(); |
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| 148 | } |
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| 149 | |
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| 150 | void Win32GLSupport::setConfigOption(const String &name, const String &value) |
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| 151 | { |
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| 152 | ConfigOptionMap::iterator it = mOptions.find(name); |
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| 153 | |
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| 154 | // Update |
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| 155 | if(it != mOptions.end()) |
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| 156 | it->second.currentValue = value; |
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| 157 | else |
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| 158 | { |
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| 159 | StringUtil::StrStreamType str; |
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| 160 | str << "Option named '" << name << "' does not exist."; |
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| 161 | OGRE_EXCEPT( Exception::ERR_INVALIDPARAMS, str.str(), "Win32GLSupport::setConfigOption" ); |
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| 162 | } |
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| 163 | |
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| 164 | if( name == "Video Mode" ) |
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| 165 | refreshConfig(); |
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| 166 | |
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| 167 | if( name == "Full Screen" ) |
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| 168 | { |
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| 169 | it = mOptions.find( "Display Frequency" ); |
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| 170 | if( value == "No" ) |
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| 171 | { |
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| 172 | it->second.currentValue = "N/A"; |
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| 173 | it->second.immutable = true; |
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| 174 | } |
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| 175 | else |
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| 176 | { |
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| 177 | it->second.currentValue = it->second.possibleValues.front(); |
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| 178 | it->second.immutable = false; |
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| 179 | } |
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| 180 | } |
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| 181 | } |
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| 182 | |
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| 183 | String Win32GLSupport::validateConfig() |
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| 184 | { |
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| 185 | // TODO, DX9 |
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| 186 | return StringUtil::BLANK; |
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| 187 | } |
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| 188 | |
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| 189 | RenderWindow* Win32GLSupport::createWindow(bool autoCreateWindow, GLRenderSystem* renderSystem, const String& windowTitle) |
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| 190 | { |
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| 191 | if (autoCreateWindow) |
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| 192 | { |
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| 193 | ConfigOptionMap::iterator opt = mOptions.find("Full Screen"); |
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| 194 | if (opt == mOptions.end()) |
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| 195 | OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, "Can't find full screen options!", "Win32GLSupport::createWindow"); |
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| 196 | bool fullscreen = (opt->second.currentValue == "Yes"); |
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| 197 | |
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| 198 | opt = mOptions.find("Video Mode"); |
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| 199 | if (opt == mOptions.end()) |
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| 200 | OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, "Can't find video mode options!", "Win32GLSupport::createWindow"); |
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| 201 | String val = opt->second.currentValue; |
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| 202 | String::size_type pos = val.find('x'); |
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| 203 | if (pos == String::npos) |
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| 204 | OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, "Invalid Video Mode provided", "Win32GLSupport::createWindow"); |
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| 205 | |
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| 206 | unsigned int w = StringConverter::parseUnsignedInt(val.substr(0, pos)); |
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| 207 | unsigned int h = StringConverter::parseUnsignedInt(val.substr(pos + 1)); |
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| 208 | |
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| 209 | // Parse optional parameters |
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| 210 | NameValuePairList winOptions; |
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| 211 | opt = mOptions.find("Colour Depth"); |
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| 212 | if (opt == mOptions.end()) |
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| 213 | OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, "Can't find Colour Depth options!", "Win32GLSupport::createWindow"); |
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| 214 | unsigned int colourDepth = |
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| 215 | StringConverter::parseUnsignedInt(opt->second.currentValue); |
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| 216 | winOptions["colourDepth"] = StringConverter::toString(colourDepth); |
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| 217 | |
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| 218 | opt = mOptions.find("VSync"); |
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| 219 | if (opt == mOptions.end()) |
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| 220 | OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, "Can't find VSync options!", "Win32GLSupport::createWindow"); |
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| 221 | bool vsync = (opt->second.currentValue == "Yes"); |
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| 222 | winOptions["vsync"] = StringConverter::toString(vsync); |
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| 223 | renderSystem->setWaitForVerticalBlank(vsync); |
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| 224 | |
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| 225 | opt = mOptions.find("Display Frequency"); |
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| 226 | if (opt != mOptions.end()) |
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| 227 | { |
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| 228 | unsigned int displayFrequency = |
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| 229 | StringConverter::parseUnsignedInt(opt->second.currentValue); |
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| 230 | winOptions["displayFrequency"] = StringConverter::toString(displayFrequency); |
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| 231 | } |
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| 232 | |
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| 233 | opt = mOptions.find("FSAA"); |
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| 234 | if (opt == mOptions.end()) |
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| 235 | OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, "Can't find FSAA options!", "Win32GLSupport::createWindow"); |
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| 236 | unsigned int multisample = |
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| 237 | StringConverter::parseUnsignedInt(opt->second.currentValue); |
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| 238 | winOptions["FSAA"] = StringConverter::toString(multisample); |
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| 239 | |
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| 240 | return renderSystem->createRenderWindow(windowTitle, w, h, fullscreen, &winOptions); |
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| 241 | } |
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| 242 | else |
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| 243 | { |
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| 244 | // XXX What is the else? |
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| 245 | return NULL; |
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| 246 | } |
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| 247 | } |
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| 248 | |
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| 249 | RenderWindow* Win32GLSupport::newWindow(const String &name, unsigned int width, |
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| 250 | unsigned int height, bool fullScreen, const NameValuePairList *miscParams) |
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| 251 | { |
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| 252 | ConfigOptionMap::iterator opt = mOptions.find("Display Frequency"); |
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| 253 | if (opt == mOptions.end()) |
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| 254 | OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, "Can't find Display Frequency options!", "Win32GLSupport::newWindow"); |
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| 255 | unsigned int displayFrequency = StringConverter::parseUnsignedInt(opt->second.currentValue); |
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| 256 | |
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| 257 | Win32Window* window = new Win32Window(*this); |
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| 258 | window->create(name, width, height, fullScreen, miscParams); |
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| 259 | |
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| 260 | if(!mInitialWindow) |
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| 261 | mInitialWindow = window; |
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| 262 | return window; |
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| 263 | } |
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| 264 | |
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| 265 | void Win32GLSupport::start() |
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| 266 | { |
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| 267 | LogManager::getSingleton().logMessage("*** Starting Win32GL Subsystem ***"); |
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| 268 | } |
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| 269 | |
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| 270 | void Win32GLSupport::stop() |
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| 271 | { |
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| 272 | LogManager::getSingleton().logMessage("*** Stopping Win32GL Subsystem ***"); |
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| 273 | mInitialWindow = 0; // Since there is no removeWindow, although there should be... |
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| 274 | } |
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| 275 | |
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| 276 | void Win32GLSupport::initialiseExtensions() |
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| 277 | { |
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| 278 | assert(mInitialWindow); |
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| 279 | // First, initialise the normal extensions |
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| 280 | GLSupport::initialiseExtensions(); |
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| 281 | // wglew init |
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| 282 | wglewContextInit(this); |
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| 283 | |
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| 284 | // Check for W32 specific extensions probe function |
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| 285 | PFNWGLGETEXTENSIONSSTRINGARBPROC _wglGetExtensionsStringARB = |
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| 286 | (PFNWGLGETEXTENSIONSSTRINGARBPROC)wglGetProcAddress("wglGetExtensionsStringARB"); |
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| 287 | if(!_wglGetExtensionsStringARB) |
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| 288 | return; |
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| 289 | const char *wgl_extensions = _wglGetExtensionsStringARB(mInitialWindow->getHDC()); |
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| 290 | StringUtil::StrStreamType str; |
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| 291 | str << "Supported WGL extensions: " << wgl_extensions; |
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| 292 | LogManager::getSingleton().logMessage( |
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| 293 | LML_NORMAL, str.str()); |
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| 294 | // Parse them, and add them to the main list |
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| 295 | std::stringstream ext; |
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| 296 | String instr; |
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| 297 | ext << wgl_extensions; |
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| 298 | while(ext >> instr) |
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| 299 | { |
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| 300 | extensionList.insert(instr); |
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| 301 | } |
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| 302 | } |
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| 303 | |
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| 304 | |
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| 305 | void* Win32GLSupport::getProcAddress(const String& procname) |
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| 306 | { |
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| 307 | return (void*)wglGetProcAddress( procname.c_str() ); |
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| 308 | } |
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| 309 | /* |
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| 310 | RenderTexture * Win32GLSupport::createRenderTexture( const String & name, |
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| 311 | unsigned int width, unsigned int height, |
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| 312 | TextureType texType, PixelFormat internalFormat, |
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| 313 | const NameValuePairList *miscParams ) |
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| 314 | { |
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| 315 | #ifdef HW_RTT |
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| 316 | bool useBind = checkExtension("WGL_ARB_render_texture"); |
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| 317 | |
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| 318 | if(Root::getSingleton().getRenderSystem()->getCapabilities()->hasCapability(RSC_HWRENDER_TO_TEXTURE)) |
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| 319 | return new Win32RenderTexture(*this, name, width, height, texType, |
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| 320 | internalFormat, miscParams, useBind); |
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| 321 | else |
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| 322 | #endif |
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| 323 | return new GLRenderTexture(name, width, height, texType, internalFormat, miscParams); |
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| 324 | } |
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| 325 | |
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| 326 | */ |
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| 327 | void Win32GLSupport::initialiseWGL() |
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| 328 | { |
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| 329 | // wglGetProcAddress does not work without an active OpenGL context, |
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| 330 | // but we need wglChoosePixelFormatARB's address before we can |
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| 331 | // create our main window. Thank you very much, Microsoft! |
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| 332 | // |
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| 333 | // The solution is to create a dummy OpenGL window first, and then |
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| 334 | // test for WGL_ARB_pixel_format support. If it is not supported, |
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| 335 | // we make sure to never call the ARB pixel format functions. |
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| 336 | // |
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| 337 | // If is is supported, we call the pixel format functions at least once |
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| 338 | // to initialise them (pointers are stored by glprocs.h). We can also |
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| 339 | // take this opportunity to enumerate the valid FSAA modes. |
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| 340 | |
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| 341 | LPCSTR dummyText = "OgreWglDummy"; |
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| 342 | #ifdef OGRE_STATIC_LIB |
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| 343 | HINSTANCE hinst = GetModuleHandle( NULL ); |
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| 344 | #else |
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| 345 | HINSTANCE hinst = GetModuleHandle("RenderSystem_GL.dll"); |
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| 346 | #endif |
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| 347 | |
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| 348 | WNDCLASS dummyClass; |
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| 349 | memset(&dummyClass, 0, sizeof(WNDCLASS)); |
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| 350 | dummyClass.style = CS_OWNDC; |
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| 351 | dummyClass.hInstance = hinst; |
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| 352 | dummyClass.lpfnWndProc = dummyWndProc; |
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| 353 | dummyClass.lpszClassName = dummyText; |
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| 354 | RegisterClass(&dummyClass); |
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| 355 | |
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| 356 | HWND hwnd = CreateWindow(dummyText, dummyText, |
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| 357 | WS_POPUP | WS_CLIPCHILDREN, |
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| 358 | 0, 0, 32, 32, 0, 0, hinst, 0); |
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| 359 | |
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| 360 | // if a simple CreateWindow fails, then boy are we in trouble... |
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| 361 | if (hwnd == NULL) |
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| 362 | OGRE_EXCEPT(Exception::ERR_RENDERINGAPI_ERROR, "CreateWindow() failed", "Win32GLSupport::initializeWGL"); |
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| 363 | |
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| 364 | |
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| 365 | // no chance of failure and no need to release thanks to CS_OWNDC |
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| 366 | HDC hdc = GetDC(hwnd); |
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| 367 | |
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| 368 | // assign a simple OpenGL pixel format that everyone supports |
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| 369 | PIXELFORMATDESCRIPTOR pfd; |
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| 370 | memset(&pfd, 0, sizeof(PIXELFORMATDESCRIPTOR)); |
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| 371 | pfd.nSize = sizeof(PIXELFORMATDESCRIPTOR); |
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| 372 | pfd.nVersion = 1; |
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| 373 | pfd.cColorBits = 16; |
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| 374 | pfd.cDepthBits = 15; |
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| 375 | pfd.dwFlags = PFD_DRAW_TO_WINDOW|PFD_SUPPORT_OPENGL|PFD_DOUBLEBUFFER; |
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| 376 | pfd.iPixelType = PFD_TYPE_RGBA; |
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| 377 | |
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| 378 | // if these fail, wglCreateContext will also quietly fail |
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| 379 | int format; |
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| 380 | if ((format = ChoosePixelFormat(hdc, &pfd)) != 0) |
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| 381 | SetPixelFormat(hdc, format, &pfd); |
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| 382 | |
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| 383 | HGLRC hrc = wglCreateContext(hdc); |
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| 384 | if (hrc) |
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| 385 | { |
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| 386 | HGLRC oldrc = wglGetCurrentContext(); |
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| 387 | HDC oldhdc = wglGetCurrentDC(); |
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| 388 | // if wglMakeCurrent fails, wglGetProcAddress will return null |
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| 389 | wglMakeCurrent(hdc, hrc); |
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| 390 | |
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| 391 | PFNWGLGETEXTENSIONSSTRINGARBPROC _wglGetExtensionsStringARB = |
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| 392 | (PFNWGLGETEXTENSIONSSTRINGARBPROC) |
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| 393 | wglGetProcAddress("wglGetExtensionsStringARB"); |
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| 394 | |
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| 395 | // check for pixel format and multisampling support |
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| 396 | if (_wglGetExtensionsStringARB) |
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| 397 | { |
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| 398 | std::istringstream wglexts(_wglGetExtensionsStringARB(hdc)); |
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| 399 | std::string ext; |
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| 400 | while (wglexts >> ext) |
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| 401 | { |
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| 402 | if (ext == "WGL_ARB_pixel_format") |
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| 403 | mHasPixelFormatARB = true; |
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| 404 | else if (ext == "WGL_ARB_multisample") |
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| 405 | mHasMultisample = true; |
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| 406 | } |
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| 407 | } |
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| 408 | |
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| 409 | if (mHasPixelFormatARB && mHasMultisample) |
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| 410 | { |
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| 411 | // enumerate all formats w/ multisampling |
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| 412 | static const int iattr[] = { |
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| 413 | WGL_DRAW_TO_WINDOW_ARB, GL_TRUE, |
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| 414 | WGL_SUPPORT_OPENGL_ARB, GL_TRUE, |
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| 415 | WGL_DOUBLE_BUFFER_ARB, GL_TRUE, |
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| 416 | WGL_SAMPLE_BUFFERS_ARB, GL_TRUE, |
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| 417 | WGL_ACCELERATION_ARB, WGL_FULL_ACCELERATION_ARB, |
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| 418 | /* We are no matter about the colour, depth and stencil buffers here |
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| 419 | WGL_COLOR_BITS_ARB, 24, |
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| 420 | WGL_ALPHA_BITS_ARB, 8, |
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| 421 | WGL_DEPTH_BITS_ARB, 24, |
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| 422 | WGL_STENCIL_BITS_ARB, 8, |
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| 423 | */ |
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| 424 | WGL_SAMPLES_ARB, 2, |
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| 425 | 0 |
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| 426 | }; |
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| 427 | int formats[256]; |
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| 428 | unsigned int count; |
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| 429 | // cheating here. wglChoosePixelFormatARB procc address needed later on |
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| 430 | // when a valid GL context does not exist and glew is not initialized yet. |
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| 431 | __wglewChoosePixelFormatARB = |
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| 432 | (PFNWGLCHOOSEPIXELFORMATARBPROC)wglGetProcAddress("wglChoosePixelFormatARB"); |
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| 433 | if (__wglewChoosePixelFormatARB(hdc, iattr, 0, 256, formats, &count)) |
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| 434 | { |
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| 435 | // determine what multisampling levels are offered |
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| 436 | int query = WGL_SAMPLES_ARB, samples; |
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| 437 | for (unsigned int i = 0; i < count; ++i) |
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| 438 | { |
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| 439 | PFNWGLGETPIXELFORMATATTRIBIVARBPROC _wglGetPixelFormatAttribivARB = |
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| 440 | (PFNWGLGETPIXELFORMATATTRIBIVARBPROC) |
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| 441 | wglGetProcAddress("wglGetPixelFormatAttribivARB"); |
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| 442 | if (_wglGetPixelFormatAttribivARB(hdc, formats[i], 0, 1, &query, &samples)) |
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| 443 | { |
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| 444 | mFSAALevels.push_back(samples); |
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| 445 | } |
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| 446 | } |
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| 447 | remove_duplicates(mFSAALevels); |
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| 448 | } |
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| 449 | } |
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| 450 | |
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| 451 | wglMakeCurrent(oldhdc, oldrc); |
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| 452 | wglDeleteContext(hrc); |
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| 453 | } |
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| 454 | |
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| 455 | // clean up our dummy window and class |
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| 456 | DestroyWindow(hwnd); |
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| 457 | UnregisterClass(dummyText, hinst); |
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| 458 | } |
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| 459 | |
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| 460 | LRESULT Win32GLSupport::dummyWndProc(HWND hwnd, UINT umsg, WPARAM wp, LPARAM lp) |
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| 461 | { |
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| 462 | return DefWindowProc(hwnd, umsg, wp, lp); |
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| 463 | } |
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| 464 | |
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| 465 | bool Win32GLSupport::selectPixelFormat(HDC hdc, int colourDepth, int multisample) |
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| 466 | { |
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| 467 | PIXELFORMATDESCRIPTOR pfd; |
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| 468 | memset(&pfd, 0, sizeof(pfd)); |
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| 469 | pfd.nSize = sizeof(pfd); |
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| 470 | pfd.nVersion = 1; |
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| 471 | pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER; |
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| 472 | pfd.iPixelType = PFD_TYPE_RGBA; |
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| 473 | pfd.cColorBits = (colourDepth > 16)? 24 : colourDepth; |
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| 474 | pfd.cAlphaBits = (colourDepth > 16)? 8 : 0; |
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| 475 | pfd.cDepthBits = 24; |
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| 476 | pfd.cStencilBits = 8; |
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| 477 | |
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| 478 | int format = 0; |
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| 479 | |
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| 480 | if (multisample) |
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| 481 | { |
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| 482 | // only available with driver support |
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| 483 | if (!mHasMultisample || !mHasPixelFormatARB) |
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| 484 | return false; |
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| 485 | |
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| 486 | int iattr[] = { |
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| 487 | WGL_DRAW_TO_WINDOW_ARB, GL_TRUE, |
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| 488 | WGL_SUPPORT_OPENGL_ARB, GL_TRUE, |
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| 489 | WGL_DOUBLE_BUFFER_ARB, GL_TRUE, |
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| 490 | WGL_SAMPLE_BUFFERS_ARB, GL_TRUE, |
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| 491 | WGL_ACCELERATION_ARB, WGL_FULL_ACCELERATION_ARB, |
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| 492 | WGL_COLOR_BITS_ARB, pfd.cColorBits, |
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| 493 | WGL_ALPHA_BITS_ARB, pfd.cAlphaBits, |
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| 494 | WGL_DEPTH_BITS_ARB, 24, |
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| 495 | WGL_STENCIL_BITS_ARB, 8, |
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| 496 | WGL_SAMPLES_ARB, multisample, |
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| 497 | 0 |
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| 498 | }; |
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| 499 | |
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| 500 | UINT nformats; |
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| 501 | assert(__wglewChoosePixelFormatARB && "failed to get proc address for ChoosePixelFormatARB"); |
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| 502 | // ChoosePixelFormatARB proc address was obtained when setting up a dummy GL context in initialiseWGL() |
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| 503 | // since glew hasn't been initialized yet, we have to cheat and use the previously obtained address |
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| 504 | if (!__wglewChoosePixelFormatARB(hdc, iattr, NULL, 1, &format, &nformats) || nformats <= 0) |
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| 505 | return false; |
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| 506 | } |
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| 507 | else |
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| 508 | { |
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| 509 | format = ChoosePixelFormat(hdc, &pfd); |
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| 510 | } |
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| 511 | |
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| 512 | return (format != 0 && SetPixelFormat(hdc, format, &pfd)); |
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| 513 | } |
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| 514 | |
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| 515 | bool Win32GLSupport::supportsPBuffers() |
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| 516 | { |
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| 517 | return __WGLEW_ARB_pbuffer != GL_FALSE; |
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| 518 | } |
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| 519 | GLPBuffer *Win32GLSupport::createPBuffer(PixelComponentType format, size_t width, size_t height) |
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| 520 | { |
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| 521 | return new Win32PBuffer(format, width, height); |
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| 522 | } |
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| 523 | } |
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