[1] | 1 | /* |
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| 2 | ----------------------------------------------------------------------------- |
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| 3 | This source file is part of OGRE |
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| 4 | (Object-oriented Graphics Rendering Engine) |
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| 5 | For the latest info, see http://www.ogre3d.org/ |
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| 6 | |
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| 7 | Copyright (c) 2000-2006 Torus Knot Software Ltd |
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| 8 | Also see acknowledgements in Readme.html |
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| 9 | |
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| 10 | This program is free software; you can redistribute it and/or modify it under |
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| 11 | the terms of the GNU Lesser General Public License as published by the Free Software |
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| 12 | Foundation; either version 2 of the License, or (at your option) any later |
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| 13 | version. |
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| 14 | |
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| 15 | This program is distributed in the hope that it will be useful, but WITHOUT |
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| 16 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
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| 17 | FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. |
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| 18 | |
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| 19 | You should have received a copy of the GNU Lesser General Public License along with |
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| 20 | this program; if not, write to the Free Software Foundation, Inc., 59 Temple |
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| 21 | Place - Suite 330, Boston, MA 02111-1307, USA, or go to |
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| 22 | http://www.gnu.org/copyleft/lesser.txt. |
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| 23 | |
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| 24 | You may alternatively use this source under the terms of a specific version of |
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| 25 | the OGRE Unrestricted License provided you have obtained such a license from |
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| 26 | Torus Knot Software Ltd. |
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| 27 | ----------------------------------------------------------------------------- |
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| 28 | */ |
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| 29 | #include "OgreStableHeaders.h" |
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| 30 | |
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| 31 | #include "OgreException.h" |
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| 32 | #include "OgreLogManager.h" |
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| 33 | #include "OgreRoot.h" |
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| 34 | #include "OgreStringConverter.h" |
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| 35 | |
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| 36 | #include "OgreGLRenderSystem.h" |
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| 37 | #include "OgreGLXUtils.h" |
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| 38 | |
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| 39 | #include "OgreNoMemoryMacros.h" |
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| 40 | #include <GL/glxext.h> |
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| 41 | |
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| 42 | namespace Ogre { |
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| 43 | struct visual_attribs |
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| 44 | { |
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| 45 | /* X visual attribs */ |
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| 46 | int id; |
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| 47 | int klass; |
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| 48 | int depth; |
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| 49 | int redMask, greenMask, blueMask; |
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| 50 | int colormapSize; |
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| 51 | int bitsPerRGB; |
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| 52 | |
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| 53 | /* GL visual attribs */ |
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| 54 | int supportsGL; |
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| 55 | int transparentType; |
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| 56 | int transparentRedValue; |
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| 57 | int transparentGreenValue; |
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| 58 | int transparentBlueValue; |
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| 59 | int transparentAlphaValue; |
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| 60 | int transparentIndexValue; |
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| 61 | int bufferSize; |
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| 62 | int level; |
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| 63 | int rgba; |
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| 64 | int doubleBuffer; |
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| 65 | int stereo; |
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| 66 | int auxBuffers; |
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| 67 | int redSize, greenSize, blueSize, alphaSize; |
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| 68 | int depthSize; |
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| 69 | int stencilSize; |
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| 70 | int accumRedSize, accumGreenSize, accumBlueSize, accumAlphaSize; |
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| 71 | int numSamples, numMultisample; |
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| 72 | int visualCaveat; |
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| 73 | }; |
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| 74 | |
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| 75 | |
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| 76 | |
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| 77 | FBConfigData::FBConfigData(): |
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| 78 | configID(0), visualID(0), bufferSize(0), level(0), doubleBuffer(0), stereo(0), |
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| 79 | auxBuffers(0), renderType(0), |
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| 80 | redSize(0), greenSize(0), blueSize(0), alphaSize(0), |
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| 81 | depthSize(0), stencilSize(0), |
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| 82 | accumRedSize(0), accumGreenSize(0), accumBlueSize(0), accumAlphaSize(0), |
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| 83 | drawableType(0), caveat(0), |
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| 84 | maxPBufferWidth(0), maxPBufferHeight(0), maxPBufferPixels(0) |
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| 85 | { |
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| 86 | memset(this, 0, sizeof(FBConfigData)); |
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| 87 | } |
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| 88 | FBConfigData::FBConfigData(Display *dpy, GLXFBConfig config) |
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| 89 | { |
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| 90 | memset(this, 0, sizeof(FBConfigData)); |
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| 91 | |
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| 92 | glXGetFBConfigAttrib(dpy, config, GLX_FBCONFIG_ID, &configID); |
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| 93 | glXGetFBConfigAttrib(dpy, config, GLX_VISUAL_ID, &visualID); |
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| 94 | glXGetFBConfigAttrib(dpy, config, GLX_BUFFER_SIZE, &bufferSize); |
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| 95 | glXGetFBConfigAttrib(dpy, config, GLX_LEVEL, &level); |
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| 96 | glXGetFBConfigAttrib(dpy, config, GLX_DOUBLEBUFFER, &doubleBuffer); |
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| 97 | glXGetFBConfigAttrib(dpy, config, GLX_STEREO, &stereo); |
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| 98 | glXGetFBConfigAttrib(dpy, config, GLX_AUX_BUFFERS, &auxBuffers); |
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| 99 | glXGetFBConfigAttrib(dpy, config, GLX_RENDER_TYPE, &renderType); |
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| 100 | glXGetFBConfigAttrib(dpy, config, GLX_RED_SIZE, &redSize); |
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| 101 | glXGetFBConfigAttrib(dpy, config, GLX_GREEN_SIZE, &greenSize); |
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| 102 | glXGetFBConfigAttrib(dpy, config, GLX_BLUE_SIZE, &blueSize); |
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| 103 | glXGetFBConfigAttrib(dpy, config, GLX_ALPHA_SIZE, &alphaSize); |
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| 104 | glXGetFBConfigAttrib(dpy, config, GLX_DEPTH_SIZE, &depthSize); |
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| 105 | glXGetFBConfigAttrib(dpy, config, GLX_STENCIL_SIZE, &stencilSize); |
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| 106 | glXGetFBConfigAttrib(dpy, config, GLX_ACCUM_RED_SIZE, &accumRedSize); |
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| 107 | glXGetFBConfigAttrib(dpy, config, GLX_ACCUM_GREEN_SIZE, &accumGreenSize); |
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| 108 | glXGetFBConfigAttrib(dpy, config, GLX_ACCUM_BLUE_SIZE, &accumBlueSize); |
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| 109 | glXGetFBConfigAttrib(dpy, config, GLX_ACCUM_ALPHA_SIZE, &accumAlphaSize); |
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| 110 | glXGetFBConfigAttrib(dpy, config, GLX_DRAWABLE_TYPE, &drawableType); |
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| 111 | glXGetFBConfigAttrib(dpy, config, GLX_CONFIG_CAVEAT, &caveat); |
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| 112 | glXGetFBConfigAttrib(dpy, config, GLX_MAX_PBUFFER_WIDTH, &maxPBufferWidth); |
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| 113 | glXGetFBConfigAttrib(dpy, config, GLX_MAX_PBUFFER_HEIGHT, &maxPBufferHeight); |
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| 114 | glXGetFBConfigAttrib(dpy, config, GLX_MAX_PBUFFER_PIXELS, &maxPBufferPixels); |
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| 115 | } |
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| 116 | String FBConfigData::toString() const |
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| 117 | { |
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| 118 | std::stringstream ss; |
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| 119 | ss << "configID=" << configID; |
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| 120 | ss << " visualID=" << visualID; |
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| 121 | ss << " bufferSize=" << bufferSize; |
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| 122 | ss << " level=" << level; |
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| 123 | ss << " doubleBuffer=" << doubleBuffer; |
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| 124 | ss << " stereo=" << stereo; |
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| 125 | ss << " auxBuffers=" << auxBuffers; |
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| 126 | ss << " renderType=" << renderType; |
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| 127 | ss << " redSize=" << redSize; |
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| 128 | ss << " greenSize=" << greenSize; |
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| 129 | ss << " blueSize=" << blueSize; |
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| 130 | ss << " alphaSize=" << alphaSize; |
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| 131 | ss << " depthSize=" << depthSize; |
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| 132 | ss << " stencilSize=" << stencilSize; |
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| 133 | ss << " accumRedSize=" << accumRedSize; |
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| 134 | ss << " accumGreenSize=" << accumGreenSize; |
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| 135 | ss << " accumBlueSize=" << accumBlueSize; |
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| 136 | ss << " accumAlphaSize=" << accumAlphaSize; |
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| 137 | ss << " drawableType=" << drawableType; |
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| 138 | ss << " caveat=" << caveat; |
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| 139 | ss << " maxPBufferWidth=" << maxPBufferWidth; |
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| 140 | ss << " maxPBufferHeight=" << maxPBufferHeight; |
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| 141 | ss << " maxPBufferPixels=" << maxPBufferPixels; |
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| 142 | return ss.str(); |
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| 143 | } |
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| 144 | |
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| 145 | bool GLXUtils::LoadIcon(Display *mDisplay, Window rootWindow, const std::string &name, Pixmap *pix, Pixmap *mask) |
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| 146 | { |
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| 147 | Image img; |
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| 148 | int mWidth, mHeight; |
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| 149 | char *data, *bitmap; |
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| 150 | try { |
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| 151 | // Try to load image |
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| 152 | img.load(name, ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME); |
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| 153 | mWidth = img.getWidth(); |
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| 154 | mHeight = img.getHeight(); |
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| 155 | if(img.getFormat() != PF_A8R8G8B8) |
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| 156 | // Image format must be RGBA |
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| 157 | return 0; |
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| 158 | } catch(Exception &e) { |
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| 159 | // Could not find image; never mind |
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| 160 | return false; |
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| 161 | } |
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| 162 | |
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| 163 | // Allocate space for image data |
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| 164 | data = (char*)malloc(mWidth * mHeight * 4); // Must be allocated with malloc |
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| 165 | // Allocate space for transparency bitmap |
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| 166 | int wbits = (mWidth+7)/8; |
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| 167 | bitmap = (char*)malloc(wbits * mHeight); |
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| 168 | |
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| 169 | // Convert and copy image |
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| 170 | const char *imgdata = (const char*)img.getData(); |
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| 171 | int sptr = 0, dptr = 0; |
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| 172 | for(int y=0; y<mHeight; y++) { |
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| 173 | for(int x=0; x<mWidth; x++) { |
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| 174 | data[dptr + 0] = 0; |
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| 175 | data[dptr + 1] = imgdata[sptr + 0]; |
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| 176 | data[dptr + 2] = imgdata[sptr + 1]; |
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| 177 | data[dptr + 3] = imgdata[sptr + 2]; |
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| 178 | // Alpha threshold |
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| 179 | if(((unsigned char)imgdata[sptr + 3])<128) { |
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| 180 | bitmap[y*wbits+(x>>3)] &= ~(1<<(x&7)); |
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| 181 | } else { |
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| 182 | bitmap[y*wbits+(x>>3)] |= 1<<(x&7); |
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| 183 | } |
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| 184 | sptr += 4; |
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| 185 | dptr += 4; |
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| 186 | } |
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| 187 | } |
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| 188 | |
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| 189 | /* put my pixmap data into the client side X image data structure */ |
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| 190 | XImage *image = XCreateImage (mDisplay, NULL, 24, ZPixmap, 0, |
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| 191 | data, |
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| 192 | mWidth, mHeight, 8, |
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| 193 | mWidth*4); |
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| 194 | image->byte_order = MSBFirst; // 0RGB format |
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| 195 | |
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| 196 | /* tell server to start managing my pixmap */ |
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| 197 | Pixmap retval = XCreatePixmap(mDisplay, rootWindow, mWidth, |
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| 198 | mHeight, 24); |
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| 199 | |
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| 200 | /* copy from client to server */ |
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| 201 | GC context = XCreateGC (mDisplay, rootWindow, 0, NULL); |
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| 202 | XPutImage(mDisplay, retval, context, image, 0, 0, 0, 0, |
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| 203 | mWidth, mHeight); |
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| 204 | |
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| 205 | /* free up the client side pixmap data area */ |
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| 206 | XDestroyImage(image); // also cleans data |
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| 207 | XFreeGC(mDisplay, context); |
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| 208 | |
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| 209 | *pix = retval; |
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| 210 | *mask = XCreateBitmapFromData(mDisplay, rootWindow, bitmap, mWidth, mHeight); |
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| 211 | free(bitmap); |
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| 212 | return true; |
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| 213 | } |
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| 214 | |
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| 215 | |
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| 216 | |
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| 217 | static void |
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| 218 | get_visual_attribs(Display *dpy, XVisualInfo *vInfo, |
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| 219 | struct visual_attribs *attribs) |
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| 220 | { |
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| 221 | const char *ext = glXQueryExtensionsString(dpy, vInfo->screen); |
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| 222 | |
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| 223 | memset(attribs, 0, sizeof(struct visual_attribs)); |
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| 224 | |
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| 225 | attribs->id = vInfo->visualid; |
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| 226 | #if defined(__cplusplus) || defined(c_plusplus) |
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| 227 | |
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| 228 | attribs->klass = vInfo->c_class; |
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| 229 | #else |
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| 230 | |
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| 231 | attribs->klass = vInfo->class; |
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| 232 | #endif |
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| 233 | |
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| 234 | attribs->depth = vInfo->depth; |
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| 235 | attribs->redMask = vInfo->red_mask; |
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| 236 | attribs->greenMask = vInfo->green_mask; |
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| 237 | attribs->blueMask = vInfo->blue_mask; |
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| 238 | attribs->colormapSize = vInfo->colormap_size; |
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| 239 | attribs->bitsPerRGB = vInfo->bits_per_rgb; |
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| 240 | |
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| 241 | if (glXGetConfig(dpy, vInfo, GLX_USE_GL, &attribs->supportsGL) != 0) |
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| 242 | return; |
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| 243 | glXGetConfig(dpy, vInfo, GLX_BUFFER_SIZE, &attribs->bufferSize); |
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| 244 | glXGetConfig(dpy, vInfo, GLX_LEVEL, &attribs->level); |
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| 245 | glXGetConfig(dpy, vInfo, GLX_RGBA, &attribs->rgba); |
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| 246 | glXGetConfig(dpy, vInfo, GLX_DOUBLEBUFFER, &attribs->doubleBuffer); |
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| 247 | glXGetConfig(dpy, vInfo, GLX_STEREO, &attribs->stereo); |
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| 248 | glXGetConfig(dpy, vInfo, GLX_AUX_BUFFERS, &attribs->auxBuffers); |
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| 249 | glXGetConfig(dpy, vInfo, GLX_RED_SIZE, &attribs->redSize); |
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| 250 | glXGetConfig(dpy, vInfo, GLX_GREEN_SIZE, &attribs->greenSize); |
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| 251 | glXGetConfig(dpy, vInfo, GLX_BLUE_SIZE, &attribs->blueSize); |
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| 252 | glXGetConfig(dpy, vInfo, GLX_ALPHA_SIZE, &attribs->alphaSize); |
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| 253 | glXGetConfig(dpy, vInfo, GLX_DEPTH_SIZE, &attribs->depthSize); |
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| 254 | glXGetConfig(dpy, vInfo, GLX_STENCIL_SIZE, &attribs->stencilSize); |
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| 255 | glXGetConfig(dpy, vInfo, GLX_ACCUM_RED_SIZE, &attribs->accumRedSize); |
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| 256 | glXGetConfig(dpy, vInfo, GLX_ACCUM_GREEN_SIZE, &attribs->accumGreenSize); |
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| 257 | glXGetConfig(dpy, vInfo, GLX_ACCUM_BLUE_SIZE, &attribs->accumBlueSize); |
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| 258 | glXGetConfig(dpy, vInfo, GLX_ACCUM_ALPHA_SIZE, &attribs->accumAlphaSize); |
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| 259 | |
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| 260 | /* get transparent pixel stuff */ |
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| 261 | glXGetConfig(dpy, vInfo,GLX_TRANSPARENT_TYPE, &attribs->transparentType); |
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| 262 | if (attribs->transparentType == GLX_TRANSPARENT_RGB) { |
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| 263 | glXGetConfig(dpy, vInfo, GLX_TRANSPARENT_RED_VALUE, &attribs->transparentRedValue); |
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| 264 | glXGetConfig(dpy, vInfo, GLX_TRANSPARENT_GREEN_VALUE, &attribs->transparentGreenValue); |
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| 265 | glXGetConfig(dpy, vInfo, GLX_TRANSPARENT_BLUE_VALUE, &attribs->transparentBlueValue); |
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| 266 | glXGetConfig(dpy, vInfo, GLX_TRANSPARENT_ALPHA_VALUE, &attribs->transparentAlphaValue); |
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| 267 | } else if (attribs->transparentType == GLX_TRANSPARENT_INDEX) { |
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| 268 | glXGetConfig(dpy, vInfo, GLX_TRANSPARENT_INDEX_VALUE, &attribs->transparentIndexValue); |
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| 269 | } |
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| 270 | |
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| 271 | /* multisample attribs */ |
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| 272 | if (ext && strstr("GLX_ARB_multisample", ext) == 0) { |
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| 273 | glXGetConfig(dpy, vInfo, GLX_SAMPLE_BUFFERS_ARB, &attribs->numMultisample); |
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| 274 | glXGetConfig(dpy, vInfo, GLX_SAMPLES_ARB, &attribs->numSamples); |
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| 275 | } |
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| 276 | else { |
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| 277 | attribs->numSamples = 0; |
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| 278 | attribs->numMultisample = 0; |
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| 279 | } |
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| 280 | |
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| 281 | if (ext && strstr(ext, "GLX_EXT_visual_rating")) { |
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| 282 | glXGetConfig(dpy, vInfo, GLX_VISUAL_CAVEAT_EXT, &attribs->visualCaveat); |
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| 283 | } else { |
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| 284 | attribs->visualCaveat = GLX_NONE_EXT; |
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| 285 | } |
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| 286 | } |
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| 287 | |
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| 288 | /* |
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| 289 | * Examine all visuals to find the so-called best one. |
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| 290 | * We prefer deepest RGBA buffer with depth, stencil and accum |
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| 291 | * that has no caveats. |
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| 292 | * @author Brian Paul (from the glxinfo source) |
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| 293 | */ |
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| 294 | int GLXUtils::findBestVisual(Display *dpy, int scrnum, int multiSample) |
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| 295 | { |
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| 296 | XVisualInfo theTemplate; |
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| 297 | XVisualInfo *visuals; |
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| 298 | int numVisuals; |
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| 299 | long mask; |
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| 300 | int i; |
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| 301 | struct visual_attribs bestVis; |
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| 302 | int msDiff; |
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| 303 | |
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| 304 | /* get list of all visuals on this screen */ |
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| 305 | theTemplate.screen = scrnum; |
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| 306 | mask = VisualScreenMask; |
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| 307 | visuals = XGetVisualInfo(dpy, mask, &theTemplate, &numVisuals); |
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| 308 | if(numVisuals == 0 || visuals == 0) { |
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| 309 | /* something went wrong */ |
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| 310 | if(visuals) |
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| 311 | XFree(visuals); |
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| 312 | return -1; |
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| 313 | } |
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| 314 | |
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| 315 | /* init bestVis with first visual info */ |
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| 316 | get_visual_attribs(dpy, &visuals[0], &bestVis); |
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| 317 | |
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| 318 | /* try to find a "better" visual */ |
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| 319 | for (i = 1; i < numVisuals; i++) { |
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| 320 | struct visual_attribs vis; |
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| 321 | |
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| 322 | get_visual_attribs(dpy, &visuals[i], &vis); |
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| 323 | |
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| 324 | /* always skip visuals that are slow */ |
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| 325 | if (vis.visualCaveat == GLX_SLOW_VISUAL_EXT) |
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| 326 | continue; |
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| 327 | /* skip visual if it doesn't have the desired number of multisamples */ |
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| 328 | if (multiSample != -1 && vis.numSamples != multiSample) |
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| 329 | continue; |
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| 330 | |
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| 331 | /* see if this vis is better than bestVis */ |
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| 332 | |
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| 333 | if ((!bestVis.supportsGL && vis.supportsGL) || |
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| 334 | (bestVis.visualCaveat != GLX_NONE_EXT) || |
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| 335 | (!bestVis.rgba && vis.rgba) || |
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| 336 | (!bestVis.doubleBuffer && vis.doubleBuffer) || |
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| 337 | (bestVis.redSize < vis.redSize) || |
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| 338 | (bestVis.greenSize < vis.greenSize) || |
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| 339 | (bestVis.blueSize < vis.blueSize) || |
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| 340 | (bestVis.alphaSize < vis.alphaSize) || |
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| 341 | (bestVis.depthSize < vis.depthSize) || |
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| 342 | (bestVis.stencilSize < vis.stencilSize) || |
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| 343 | (bestVis.accumRedSize < vis.accumRedSize)) |
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| 344 | { |
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| 345 | /* found a better visual */ |
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| 346 | bestVis = vis; |
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| 347 | } |
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| 348 | |
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| 349 | } |
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| 350 | |
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| 351 | XFree(visuals); |
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| 352 | if (multiSample != -1 && bestVis.numSamples != multiSample) |
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| 353 | // We found no visual with the desired FSAA |
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| 354 | return -1; |
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| 355 | return bestVis.id; |
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| 356 | } |
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| 357 | |
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| 358 | /** |
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| 359 | * Class to sort FBConfig records by best match |
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| 360 | */ |
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| 361 | class FBConfigMatchSort |
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| 362 | { |
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| 363 | public: |
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| 364 | FBConfigMatchSort(Display *dpy, const int *idealattribs): dpy(dpy), mIdeal(idealattribs) { } |
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| 365 | |
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| 366 | Display *dpy; |
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| 367 | const int *mIdeal; |
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| 368 | bool operator()(const GLXFBConfig & a, const GLXFBConfig & b) |
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| 369 | { |
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| 370 | for(int idx = 0; mIdeal[idx] != None; idx += 2) |
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| 371 | { |
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| 372 | int valuea, valueb; |
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| 373 | int valueideal = mIdeal[idx+1]; |
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| 374 | glXGetFBConfigAttrib(dpy, a, mIdeal[idx], &valuea); |
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| 375 | glXGetFBConfigAttrib(dpy, b, mIdeal[idx], &valueb); |
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| 376 | // Distance to a smaller than distance to b? |
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| 377 | if(std::abs(valuea - valueideal) < std::abs(valueb - valueideal)) |
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| 378 | return true; |
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| 379 | } |
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| 380 | return false; |
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| 381 | } |
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| 382 | }; |
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| 383 | |
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| 384 | |
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| 385 | GLXFBConfig GLXUtils::findBestMatch(Display *dpy, int scrnum, const int *attribs, const int *idealattribs) |
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| 386 | { |
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| 387 | // Create vector of existing config data formats |
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| 388 | GLXFBConfig * fbConfigs; |
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| 389 | int nConfigs; |
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| 390 | fbConfigs = glXChooseFBConfig(dpy, scrnum, attribs, &nConfigs); |
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| 391 | if (nConfigs == 0 || !fbConfigs) |
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| 392 | OGRE_EXCEPT(Exception::ERR_NOT_IMPLEMENTED, "glXChooseFBConfig() failed: Couldn't find a suitable pixel format", "GLRenderTexture::createPBuffer"); |
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| 393 | |
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| 394 | // Sort by best match |
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| 395 | std::sort(fbConfigs, fbConfigs+nConfigs, FBConfigMatchSort(dpy, idealattribs)); |
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| 396 | |
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| 397 | GLXFBConfig retval = fbConfigs[0]; |
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| 398 | XFree(fbConfigs); |
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| 399 | |
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| 400 | return retval; |
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| 401 | } |
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| 402 | |
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| 403 | }; |
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