diff --git a/scene_opengl.cpp b/scene_opengl.cpp index be276b5f2..bbbada198 100644 --- a/scene_opengl.cpp +++ b/scene_opengl.cpp @@ -1,1398 +1,1402 @@ /***************************************************************** KWin - the KDE window manager This file is part of the KDE project. Copyright (C) 2006 Lubos Lunak You can Freely distribute this program under the GNU General Public License. See the file "COPYING" for the exact licensing terms. Based on glcompmgr code by Felix Bellaby. Using code from Compiz and Beryl. ******************************************************************/ /* This is the OpenGL-based compositing code. It is the primary and most powerful compositing backend. Sources and other compositing managers: ======================================= - http://opengl.org - documentation - OpenGL Redbook (http://opengl.org/documentation/red_book/ - note it's only version 1.1) - GLX docs (http://opengl.org/documentation/specs/glx/glx1.4.pdf) - extensions docs (http://www.opengl.org/registry/) - glcompmgr - http://lists.freedesktop.org/archives/xorg/2006-July/017006.html , - http://www.mail-archive.com/compiz%40lists.freedesktop.org/msg00023.html - simple and easy to understand - works even without texture_from_pixmap extension - claims to support several different gfx cards - compile with something like "gcc -Wall glcompmgr-0.5.c `pkg-config --cflags --libs glib-2.0` -lGL -lXcomposite -lXdamage -L/usr/X11R6/lib" - compiz - git clone git://anongit.freedesktop.org/git/xorg/app/compiz - the ultimate - glxcompmgr - git clone git://anongit.freedesktop.org/git/xorg/app/glxcompgr - a rather old version of compiz, but also simpler and as such simpler to understand - beryl - a fork of Compiz - http://beryl-project.org - git clone git://anongit.beryl-project.org/beryl/beryl-core (or beryl-plugins etc. , the full list should be at git://anongit.beryl-project.org/beryl/) - libcm (metacity) - cvs -d :pserver:anonymous@anoncvs.gnome.org:/cvs/gnome co libcm - not much idea about it, the model differs a lot from KWin/Compiz/Beryl - does not seem to be very powerful or with that much development going on */ #include "scene_opengl.h" #include #include "utils.h" #include "client.h" #include "deleted.h" #include "effects.h" #include #include #include // turns on checks for opengl errors in various places (for easier finding of them) // normally only few of them are enabled //#define CHECK_GL_ERROR #ifdef HAVE_OPENGL namespace KWin { //**************************************** // SceneOpenGL //**************************************** // the configs used for the destination GLXFBConfig SceneOpenGL::fbcbuffer_db; GLXFBConfig SceneOpenGL::fbcbuffer_nondb; // the configs used for windows SceneOpenGL::FBConfigInfo SceneOpenGL::fbcdrawableinfo[ 32 + 1 ]; // GLX content GLXContext SceneOpenGL::ctxbuffer; GLXContext SceneOpenGL::ctxdrawable; // the destination drawable where the compositing is done GLXDrawable SceneOpenGL::glxbuffer = None; GLXDrawable SceneOpenGL::last_pixmap = None; bool SceneOpenGL::tfp_mode; // using glXBindTexImageEXT (texture_from_pixmap) bool SceneOpenGL::db; // destination drawable is double-buffered bool SceneOpenGL::shm_mode; #ifdef HAVE_XSHM XShmSegmentInfo SceneOpenGL::shm; #endif SceneOpenGL::SceneOpenGL( Workspace* ws ) : Scene( ws ) , init_ok( false ) { if( !Extensions::glxAvailable()) { kDebug( 1212 ) << "No glx extensions available"; return; // error } initGLX(); // check for FBConfig support if( !hasGLXVersion( 1, 3 ) && !hasGLExtension( "GLX_SGIX_fbconfig" )) { kDebug( 1212 ) << "GLX1.3 or GLX_SGIX_fbconfig missing"; return; // error } if( !selectMode()) return; // error if( !initBuffer()) // create destination buffer return; // error if( !initRenderingContext()) return; // error // Initialize OpenGL initGL(); if( db ) glDrawBuffer( GL_BACK ); // Check whether certain features are supported has_waitSync = glXGetVideoSync ? true : false; int vis_buffer, vis_drawable; glXGetFBConfigAttrib( display(), fbcbuffer, GLX_VISUAL_ID, &vis_buffer ); XVisualInfo* visinfo_buffer = glXGetVisualFromFBConfig( display(), fbcbuffer ); kDebug( 1212 ) << "Buffer visual (depth " << visinfo_buffer->depth << "): 0x" << QString::number( vis_buffer, 16 ); XFree( visinfo_buffer ); for( int i = 0; i <= 32; i++ ) { if( fbcdrawableinfo[ i ].fbconfig == NULL ) continue; glXGetFBConfigAttrib( display(), fbcdrawableinfo[ i ].fbconfig, GLX_VISUAL_ID, &vis_drawable ); kDebug( 1212 ) << "Drawable visual (depth " << i << "): 0x" << QString::number( vis_drawable, 16 ); } // OpenGL scene setup glMatrixMode( GL_PROJECTION ); glLoadIdentity(); // swap top and bottom to have OpenGL coordinate system match X system glOrtho( 0, displayWidth(), displayHeight(), 0, 0, 65535 ); glMatrixMode( GL_MODELVIEW ); glLoadIdentity(); checkGLError( "Init" ); kDebug( 1212 ) << "DB:" << db << ", TFP:" << tfp_mode << ", SHM:" << shm_mode << ", Direct:" << bool( glXIsDirect( display(), ctxbuffer )) << endl; init_ok = true; } SceneOpenGL::~SceneOpenGL() { if( !init_ok ) { // TODO this probably needs to clean up whatever has been created until the failure wspace->destroyOverlay(); return; } foreach( Window* w, windows ) delete w; // do cleanup after initBuffer() if( wspace->overlayWindow()) { if( hasGLXVersion( 1, 3 )) glXDestroyWindow( display(), glxbuffer ); XDestroyWindow( display(), buffer ); wspace->destroyOverlay(); } else { glXDestroyPixmap( display(), glxbuffer ); XFreeGC( display(), gcroot ); XFreePixmap( display(), buffer ); } if( shm_mode ) cleanupShm(); if( !tfp_mode && !shm_mode ) { if( last_pixmap != None ) glXDestroyPixmap( display(), last_pixmap ); glXDestroyContext( display(), ctxdrawable ); } glXDestroyContext( display(), ctxbuffer ); checkGLError( "Cleanup" ); } bool SceneOpenGL::initFailed() const { return !init_ok; } bool SceneOpenGL::selectMode() { // select mode - try TFP first, then SHM, otherwise fallback mode shm_mode = false; tfp_mode = false; if( options->glMode == Options::GLTFP ) { if( initTfp()) tfp_mode = true; else if( initShm()) shm_mode = true; } else if( options->glMode == Options::GLSHM ) { if( initShm()) shm_mode = true; else if( initTfp()) tfp_mode = true; } if( !initDrawableConfigs()) return false; return true; } bool SceneOpenGL::initTfp() { if( glXBindTexImageEXT == NULL || glXReleaseTexImageEXT == NULL ) return false; return true; } bool SceneOpenGL::initShm() { #ifdef HAVE_XSHM int major, minor; Bool pixmaps; if( !XShmQueryVersion( display(), &major, &minor, &pixmaps ) || !pixmaps ) return false; if( XShmPixmapFormat( display()) != ZPixmap ) return false; const int MAXSIZE = 4096 * 2048 * 4; // TODO check there are not larger windows // TODO check that bytes_per_line doesn't involve padding? shm.readOnly = False; shm.shmid = shmget( IPC_PRIVATE, MAXSIZE, IPC_CREAT | 0600 ); if( shm.shmid < 0 ) return false; shm.shmaddr = ( char* ) shmat( shm.shmid, NULL, 0 ); if( shm.shmaddr == ( void * ) -1 ) { shmctl( shm.shmid, IPC_RMID, 0 ); return false; } #ifdef __linux__ // mark as deleted to automatically free the memory in case // of a crash (but this doesn't work e.g. on Solaris ... oh well) shmctl( shm.shmid, IPC_RMID, 0 ); #endif KXErrorHandler errs; XShmAttach( display(), &shm ); if( errs.error( true )) { #ifndef __linux__ shmctl( shm.shmid, IPC_RMID, 0 ); #endif shmdt( shm.shmaddr ); return false; } return true; #else return false; #endif } void SceneOpenGL::cleanupShm() { #ifdef HAVE_XSHM shmdt( shm.shmaddr ); #ifndef __linux__ shmctl( shm.shmid, IPC_RMID, 0 ); #endif #endif } bool SceneOpenGL::initRenderingContext() { bool direct_rendering = options->glDirect; if( !tfp_mode && !shm_mode ) direct_rendering = false; // fallback doesn't seem to work with direct rendering KXErrorHandler errs; ctxbuffer = glXCreateNewContext( display(), fbcbuffer, GLX_RGBA_TYPE, NULL, direct_rendering ? GL_TRUE : GL_FALSE ); if( ctxbuffer == NULL || !glXMakeContextCurrent( display(), glxbuffer, glxbuffer, ctxbuffer ) || errs.error( true )) { // failed if( !direct_rendering ) { kDebug( 1212 ) << "Couldn't initialize rendering context"; return false; } glXDestroyContext( display(), ctxbuffer ); direct_rendering = false; // try again ctxbuffer = glXCreateNewContext( display(), fbcbuffer, GLX_RGBA_TYPE, NULL, GL_FALSE ); if( ctxbuffer == NULL || !glXMakeContextCurrent( display(), glxbuffer, glxbuffer, ctxbuffer )) { kDebug( 1212 ) << "Couldn't initialize rendering context"; return false; } } if( !tfp_mode && !shm_mode ) { ctxdrawable = glXCreateNewContext( display(), fbcdrawableinfo[ QX11Info::appDepth() ].fbconfig, GLX_RGBA_TYPE, ctxbuffer, direct_rendering ? GL_TRUE : GL_FALSE ); } return true; } // create destination buffer bool SceneOpenGL::initBuffer() { if( !initBufferConfigs()) return false; if( fbcbuffer_db != NULL && wspace->createOverlay()) { // we have overlay, try to create double-buffered window in it fbcbuffer = fbcbuffer_db; XVisualInfo* visual = glXGetVisualFromFBConfig( display(), fbcbuffer ); XSetWindowAttributes attrs; attrs.colormap = XCreateColormap( display(), rootWindow(), visual->visual, AllocNone ); buffer = XCreateWindow( display(), wspace->overlayWindow(), 0, 0, displayWidth(), displayHeight(), 0, visual->depth, InputOutput, visual->visual, CWColormap, &attrs ); if( hasGLXVersion( 1, 3 )) glxbuffer = glXCreateWindow( display(), fbcbuffer, buffer, NULL ); else glxbuffer = buffer; wspace->setupOverlay( buffer ); db = true; XFree( visual ); } else if( fbcbuffer_nondb != NULL ) { // cannot get any double-buffered drawable, will double-buffer using a pixmap fbcbuffer = fbcbuffer_nondb; XVisualInfo* visual = glXGetVisualFromFBConfig( display(), fbcbuffer ); XGCValues gcattr; gcattr.subwindow_mode = IncludeInferiors; gcroot = XCreateGC( display(), rootWindow(), GCSubwindowMode, &gcattr ); buffer = XCreatePixmap( display(), rootWindow(), displayWidth(), displayHeight(), visual->depth ); glxbuffer = glXCreatePixmap( display(), fbcbuffer, buffer, NULL ); db = false; XFree( visual ); } else { kDebug( 1212 ) << "Couldn't create output buffer (failed to create overlay window?) !"; return false; // error } return true; } // choose the best configs for the destination buffer bool SceneOpenGL::initBufferConfigs() { int cnt; GLXFBConfig *fbconfigs = glXGetFBConfigs( display(), DefaultScreen( display() ), &cnt ); fbcbuffer_db = NULL; fbcbuffer_nondb = NULL; for( int i = 0; i < 2; i++ ) { int back, stencil, depth, caveat, alpha; back = i > 0 ? INT_MAX : 1; stencil = INT_MAX; depth = INT_MAX; caveat = INT_MAX; alpha = 0; for( int j = 0; j < cnt; j++ ) { XVisualInfo *vi; int visual_depth; vi = glXGetVisualFromFBConfig( display(), fbconfigs[ j ] ); if( vi == NULL ) continue; visual_depth = vi->depth; XFree( vi ); if( visual_depth != DefaultDepth( display(), DefaultScreen( display()))) continue; int value; glXGetFBConfigAttrib( display(), fbconfigs[ j ], GLX_ALPHA_SIZE, &alpha ); glXGetFBConfigAttrib( display(), fbconfigs[ j ], GLX_BUFFER_SIZE, &value ); if( value != visual_depth && ( value - alpha ) != visual_depth ) continue; int back_value; glXGetFBConfigAttrib( display(), fbconfigs[ j ], GLX_DOUBLEBUFFER, &back_value ); if( i > 0 ) { if( back_value > back ) continue; } else { if( back_value < back ) continue; } int stencil_value; glXGetFBConfigAttrib( display(), fbconfigs[ j ], GLX_STENCIL_SIZE, &stencil_value ); if( stencil_value > stencil ) continue; int depth_value; glXGetFBConfigAttrib( display(), fbconfigs[ j ], GLX_DEPTH_SIZE, &depth_value ); if( depth_value > depth ) continue; int caveat_value; glXGetFBConfigAttrib( display(), fbconfigs[ j ], GLX_CONFIG_CAVEAT, &caveat_value ); if( caveat_value > caveat ) continue; back = back_value; stencil = stencil_value; depth = depth_value; caveat = caveat_value; if( i > 0 ) fbcbuffer_nondb = fbconfigs[ j ]; else fbcbuffer_db = fbconfigs[ j ]; } } if( cnt ) XFree( fbconfigs ); if( fbcbuffer_db == NULL && fbcbuffer_nondb == NULL ) { kDebug( 1212 ) << "Couldn't find framebuffer configuration for buffer!"; return false; } return true; } // make a list of the best configs for windows by depth bool SceneOpenGL::initDrawableConfigs() { int cnt; GLXFBConfig *fbconfigs = glXGetFBConfigs( display(), DefaultScreen( display() ), &cnt ); for( int i = 0; i <= 32; i++ ) { int back, stencil, depth, caveat, alpha, mipmap, rgba; back = INT_MAX; stencil = INT_MAX; depth = INT_MAX; caveat = INT_MAX; mipmap = 0; rgba = 0; fbcdrawableinfo[ i ].fbconfig = NULL; fbcdrawableinfo[ i ].bind_texture_format = 0; fbcdrawableinfo[ i ].y_inverted = 0; fbcdrawableinfo[ i ].mipmap = 0; for( int j = 0; j < cnt; j++ ) { XVisualInfo *vi; int visual_depth; vi = glXGetVisualFromFBConfig( display(), fbconfigs[ j ] ); if( vi == NULL ) continue; visual_depth = vi->depth; XFree( vi ); if( visual_depth != i ) continue; int value; glXGetFBConfigAttrib( display(), fbconfigs[ j ], GLX_ALPHA_SIZE, &alpha ); glXGetFBConfigAttrib( display(), fbconfigs[ j ], GLX_BUFFER_SIZE, &value ); if( value != i && ( value - alpha ) != i ) continue; if( tfp_mode ) { value = 0; if( i == 32 ) { glXGetFBConfigAttrib( display(), fbconfigs[ j ], GLX_BIND_TO_TEXTURE_RGBA_EXT, &value ); if( value ) { // TODO I think this should be set only after the config passes all tests rgba = 1; fbcdrawableinfo[ i ].bind_texture_format = GLX_TEXTURE_FORMAT_RGBA_EXT; } } if( !value ) { if( rgba ) continue; glXGetFBConfigAttrib( display(), fbconfigs[ j ], GLX_BIND_TO_TEXTURE_RGB_EXT, &value ); if( !value ) continue; fbcdrawableinfo[ i ].bind_texture_format = GLX_TEXTURE_FORMAT_RGB_EXT; } } int back_value; glXGetFBConfigAttrib( display(), fbconfigs[ j ], GLX_DOUBLEBUFFER, &back_value ); if( back_value > back ) continue; int stencil_value; glXGetFBConfigAttrib( display(), fbconfigs[ j ], GLX_STENCIL_SIZE, &stencil_value ); if( stencil_value > stencil ) continue; int depth_value; glXGetFBConfigAttrib( display(), fbconfigs[ j ], GLX_DEPTH_SIZE, &depth_value ); if( depth_value > depth ) continue; int mipmap_value = -1; if( tfp_mode && GLTexture::framebufferObjectSupported()) { glXGetFBConfigAttrib( display(), fbconfigs[ j ], GLX_BIND_TO_MIPMAP_TEXTURE_EXT, &mipmap_value ); if( mipmap_value < mipmap ) continue; } int caveat_value; glXGetFBConfigAttrib( display(), fbconfigs[ j ], GLX_CONFIG_CAVEAT, &caveat_value ); if( caveat_value > caveat ) continue; // ok, config passed all tests, it's the best one so far fbcdrawableinfo[ i ].fbconfig = fbconfigs[ j ]; caveat = caveat_value; back = back_value; stencil = stencil_value; depth = depth_value; mipmap = mipmap_value; glXGetFBConfigAttrib( display(), fbconfigs[ j ], GLX_Y_INVERTED_EXT, &value ); fbcdrawableinfo[ i ].y_inverted = value; fbcdrawableinfo[ i ].mipmap = mipmap; } } if( cnt ) XFree( fbconfigs ); if( fbcdrawableinfo[ DefaultDepth( display(), DefaultScreen( display())) ].fbconfig == NULL ) { kDebug( 1212 ) << "Couldn't find framebuffer configuration for default depth!"; return false; } return true; } // the entry function for painting void SceneOpenGL::paint( QRegion damage, ToplevelList toplevels ) { foreach( Toplevel* c, toplevels ) { assert( windows.contains( c )); stacking_order.append( windows[ c ] ); } grabXServer(); glXWaitX(); glPushMatrix(); int mask = 0; #ifdef CHECK_GL_ERROR checkGLError( "Paint1" ); #endif paintScreen( &mask, &damage ); // call generic implementation #ifdef CHECK_GL_ERROR checkGLError( "Paint2" ); #endif glPopMatrix(); ungrabXServer(); // ungrab before flushBuffer(), it may wait for vsync flushBuffer( mask, damage ); // do cleanup stacking_order.clear(); checkGLError( "PostPaint" ); } // wait for vblank signal before painting void SceneOpenGL::waitSync() { // NOTE that vsync has no effect with indirect rendering if( waitSyncAvailable() && options->glVSync ) { unsigned int sync; glFlush(); glXGetVideoSync( &sync ); glXWaitVideoSync( 2, ( sync + 1 ) % 2, &sync ); } } // actually paint to the screen (double-buffer swap or copy from pixmap buffer) void SceneOpenGL::flushBuffer( int mask, QRegion damage ) { if( db ) { if( mask & PAINT_SCREEN_REGION ) { waitSync(); if( glXCopySubBuffer ) { foreach( QRect r, damage.rects()) { // convert to OpenGL coordinates int y = displayHeight() - r.y() - r.height(); glXCopySubBuffer( display(), glxbuffer, r.x(), y, r.width(), r.height()); } } else { // no idea why glScissor() is used, but Compiz has it and it doesn't seem to hurt glEnable( GL_SCISSOR_TEST ); glDrawBuffer( GL_FRONT ); int xpos = 0; int ypos = 0; foreach( QRect r, damage.rects()) { // convert to OpenGL coordinates int y = displayHeight() - r.y() - r.height(); // Move raster position relatively using glBitmap() rather // than using glRasterPos2f() - the latter causes drawing // artefacts at the bottom screen edge with some gfx cards // glRasterPos2f( r.x(), r.y() + r.height()); glBitmap( 0, 0, 0, 0, r.x() - xpos, y - ypos, NULL ); xpos = r.x(); ypos = y; glScissor( r.x(), y, r.width(), r.height()); glCopyPixels( r.x(), y, r.width(), r.height(), GL_COLOR ); } glBitmap( 0, 0, 0, 0, -xpos, -ypos, NULL ); // move position back to 0,0 glDrawBuffer( GL_BACK ); glDisable( GL_SCISSOR_TEST ); } } else { waitSync(); glXSwapBuffers( display(), glxbuffer ); } glXWaitGL(); XFlush( display()); } else { glFlush(); glXWaitGL(); waitSync(); if( mask & PAINT_SCREEN_REGION ) foreach( QRect r, damage.rects()) XCopyArea( display(), buffer, rootWindow(), gcroot, r.x(), r.y(), r.width(), r.height(), r.x(), r.y()); else XCopyArea( display(), buffer, rootWindow(), gcroot, 0, 0, displayWidth(), displayHeight(), 0, 0 ); XFlush( display()); } } void SceneOpenGL::paintGenericScreen( int mask, ScreenPaintData data ) { if( mask & PAINT_SCREEN_TRANSFORMED ) { // apply screen transformations glPushMatrix(); glTranslatef( data.xTranslate, data.yTranslate, 0 ); glScalef( data.xScale, data.yScale, 1 ); } Scene::paintGenericScreen( mask, data ); if( mask & PAINT_SCREEN_TRANSFORMED ) glPopMatrix(); } void SceneOpenGL::paintBackground( QRegion region ) { if( region == infiniteRegion()) { glClearColor( 1, 1, 1, 1 ); // white glClear( GL_COLOR_BUFFER_BIT ); } else { glColor4f( 1, 1, 1, 1 ); // white glBegin( GL_QUADS ); foreach( QRect r, region.rects()) { glVertex2i( r.x(), r.y()); glVertex2i( r.x() + r.width(), r.y()); glVertex2i( r.x() + r.width(), r.y() + r.height()); glVertex2i( r.x(), r.y() + r.height()); } glEnd(); } } void SceneOpenGL::windowAdded( Toplevel* c ) { assert( !windows.contains( c )); windows[ c ] = new Window( c ); } void SceneOpenGL::windowClosed( Toplevel* c, Deleted* deleted ) { assert( windows.contains( c )); if( deleted != NULL ) { // replace c with deleted Window* w = windows.take( c ); w->updateToplevel( deleted ); windows[ deleted ] = w; } else { delete windows.take( c ); c->effectWindow()->setSceneWindow( NULL ); } } void SceneOpenGL::windowDeleted( Deleted* c ) { assert( windows.contains( c )); delete windows.take( c ); c->effectWindow()->setSceneWindow( NULL ); } void SceneOpenGL::windowGeometryShapeChanged( Toplevel* c ) { if( !windows.contains( c )) // this is ok, shape is not valid return; // by default Window* w = windows[ c ]; w->discardShape(); w->discardTexture(); } void SceneOpenGL::windowOpacityChanged( Toplevel* ) { #if 0 // not really needed, windows are painted on every repaint // and opacity is used when applying texture, not when // creating it if( !windows.contains( c )) // this is ok, texture is created return; // on demand Window* w = windows[ c ]; w->discardTexture(); #endif } //**************************************** // SceneOpenGL::Texture //**************************************** SceneOpenGL::Texture::Texture() : GLTexture() { init(); } SceneOpenGL::Texture::Texture( const Pixmap& pix, const QSize& size, int depth ) : GLTexture() { init(); load( pix, size, depth ); } SceneOpenGL::Texture::~Texture() { } void SceneOpenGL::Texture::init() { bound_glxpixmap = None; } void SceneOpenGL::Texture::createTexture() { glGenTextures( 1, &mTexture ); - if( hasGLVersion( 1, 4, 0 )) - { - // Lod bias makes the trilinear-filtered texture look a bit sharper - glTexEnvf( GL_TEXTURE_FILTER_CONTROL, GL_TEXTURE_LOD_BIAS, -1.0f ); - } } void SceneOpenGL::Texture::discard() { if( mTexture != None ) release(); GLTexture::discard(); } void SceneOpenGL::Texture::release() { if( tfp_mode && bound_glxpixmap != None ) { if( !options->glStrictBinding ) glXReleaseTexImageEXT( display(), bound_glxpixmap, GLX_FRONT_LEFT_EXT ); glXDestroyGLXPixmap( display(), bound_glxpixmap ); bound_glxpixmap = None; } } void SceneOpenGL::Texture::findTarget() { unsigned int new_target = 0; if( tfp_mode && glXQueryDrawable && bound_glxpixmap != None ) glXQueryDrawable( display(), bound_glxpixmap, GLX_TEXTURE_TARGET_EXT, &new_target ); // Hack for XGL - this should not be a fallback for glXQueryDrawable() but instead the case // when glXQueryDrawable is not available. However this call fails with XGL, unless KWin // is compiled statically with the libGL that Compiz is built against (without which neither // Compiz works with XGL). Falling back to doing this manually makes this work. if( new_target == 0 ) { if( NPOTTextureSupported() || ( isPowerOfTwo( mSize.width()) && isPowerOfTwo( mSize.height()))) new_target = GLX_TEXTURE_2D_EXT; else new_target = GLX_TEXTURE_RECTANGLE_EXT; } switch( new_target ) { case GLX_TEXTURE_2D_EXT: mTarget = GL_TEXTURE_2D; mScale.setWidth( 1.0f / mSize.width()); mScale.setHeight( 1.0f / mSize.height()); break; case GLX_TEXTURE_RECTANGLE_EXT: mTarget = GL_TEXTURE_RECTANGLE_ARB; mScale.setWidth( 1.0f ); mScale.setHeight( 1.0f ); break; default: assert( false ); } } QRegion SceneOpenGL::Texture::optimizeBindDamage( const QRegion& reg, int limit ) { if( reg.rects().count() <= 1 ) return reg; // try to reduce the number of rects, as especially with SHM mode every rect // causes X roundtrip, even for very small areas - so, when the size difference // between all the areas and the bounding rectangle is small, simply use // only the bounding rectangle int size = 0; foreach( QRect r, reg.rects()) size += r.width() * r.height(); if( reg.boundingRect().width() * reg.boundingRect().height() - size < limit ) return reg.boundingRect(); return reg; } bool SceneOpenGL::Texture::load( const Pixmap& pix, const QSize& size, int depth, QRegion region ) { #ifdef CHECK_GL_ERROR checkGLError( "TextureLoad1" ); #endif if( pix == None || size.isEmpty() || depth < 1 ) return false; if( tfp_mode ) { if( fbcdrawableinfo[ depth ].fbconfig == NULL ) { kDebug( 1212 ) << "No framebuffer configuration for depth " << depth << "; not binding pixmap" << endl; return false; } } mSize = size; if( mTexture == None || !region.isEmpty()) { // new texture, or texture contents changed; mipmaps now invalid setDirty(); } #ifdef CHECK_GL_ERROR checkGLError( "TextureLoad2" ); #endif if( tfp_mode ) { // tfp mode, simply bind the pixmap to texture if( mTexture == None ) createTexture(); // when the pixmap is bound to the texture, they share the same data, so the texture // updates automatically - no need to do anything in such case if( bound_glxpixmap == None ) { int attrs[] = { GLX_TEXTURE_FORMAT_EXT, fbcdrawableinfo[ depth ].bind_texture_format, GLX_MIPMAP_TEXTURE_EXT, fbcdrawableinfo[ depth ].mipmap, None }; // the GLXPixmap will reference the X pixmap, so it will be freed automatically // when no longer needed bound_glxpixmap = glXCreatePixmap( display(), fbcdrawableinfo[ depth ].fbconfig, pix, attrs ); #ifdef CHECK_GL_ERROR checkGLError( "TextureLoadTFP1" ); #endif findTarget(); y_inverted = fbcdrawableinfo[ depth ].y_inverted ? true : false; can_use_mipmaps = fbcdrawableinfo[ depth ].mipmap ? true : false; glBindTexture( mTarget, mTexture ); #ifdef CHECK_GL_ERROR checkGLError( "TextureLoadTFP2" ); #endif if( !options->glStrictBinding ) glXBindTexImageEXT( display(), bound_glxpixmap, GLX_FRONT_LEFT_EXT, NULL ); } } else if( shm_mode ) { // copy pixmap contents to a texture via shared memory #ifdef HAVE_XSHM GLenum pixfmt, type; if( depth >= 24 ) { pixfmt = GL_BGRA; type = GL_UNSIGNED_BYTE; } else { // depth 16 pixfmt = GL_RGB; type = GL_UNSIGNED_SHORT_5_6_5; } findTarget(); #ifdef CHECK_GL_ERROR checkGLError( "TextureLoadSHM1" ); #endif if( mTexture == None ) { createTexture(); y_inverted = false; glTexImage2D( mTarget, 0, depth == 32 ? GL_RGBA : GL_RGB, mSize.width(), mSize.height(), 0, pixfmt, type, NULL ); } else glBindTexture( mTarget, mTexture ); if( !region.isEmpty()) { XGCValues xgcv; xgcv.graphics_exposures = False; xgcv.subwindow_mode = IncludeInferiors; GC gc = XCreateGC( display(), pix, GCGraphicsExposures | GCSubwindowMode, &xgcv ); Pixmap p = XShmCreatePixmap( display(), rootWindow(), shm.shmaddr, &shm, mSize.width(), mSize.height(), depth ); QRegion damage = optimizeBindDamage( region, 100 * 100 ); glPixelStorei( GL_UNPACK_ROW_LENGTH, mSize.width()); foreach( QRect r, damage.rects()) { // TODO for small areas it might be faster to not use SHM to avoid the XSync() XCopyArea( display(), pix, p, gc, r.x(), r.y(), r.width(), r.height(), 0, 0 ); glXWaitX(); glTexSubImage2D( mTarget, 0, r.x(), r.y(), r.width(), r.height(), pixfmt, type, shm.shmaddr ); glXWaitGL(); } glPixelStorei( GL_UNPACK_ROW_LENGTH, 0 ); XFreePixmap( display(), p ); XFreeGC( display(), gc ); } #ifdef CHECK_GL_ERROR checkGLError( "TextureLoadSHM2" ); #endif y_inverted = true; can_use_mipmaps = true; #endif } else { // fallback, copy pixmap contents to a texture // note that if depth is not QX11Info::appDepth(), this may // not work (however, it does seem to work with nvidia) findTarget(); GLXDrawable pixmap = glXCreatePixmap( display(), fbcdrawableinfo[ QX11Info::appDepth() ].fbconfig, pix, NULL ); glXMakeContextCurrent( display(), pixmap, pixmap, ctxdrawable ); if( last_pixmap != None ) glXDestroyPixmap( display(), last_pixmap ); // workaround for ATI - it leaks/crashes when the pixmap is destroyed immediately // here (http://lists.kde.org/?l=kwin&m=116353772208535&w=2) last_pixmap = pixmap; glReadBuffer( GL_FRONT ); glDrawBuffer( GL_FRONT ); if( mTexture == None ) { createTexture(); y_inverted = false; glCopyTexImage2D( mTarget, 0, depth == 32 ? GL_RGBA : GL_RGB, 0, 0, mSize.width(), mSize.height(), 0 ); } else { glBindTexture( mTarget, mTexture ); QRegion damage = optimizeBindDamage( region, 30 * 30 ); foreach( QRect r, damage.rects()) { // convert to OpenGL coordinates (this is mapping // the pixmap to a texture, this is not affected // by using glOrtho() for the OpenGL scene) int gly = mSize.height() - r.y() - r.height(); glCopyTexSubImage2D( mTarget, 0, r.x(), gly, r.x(), gly, r.width(), r.height()); } } glXWaitGL(); if( db ) glDrawBuffer( GL_BACK ); glXMakeContextCurrent( display(), glxbuffer, glxbuffer, ctxbuffer ); glBindTexture( mTarget, mTexture ); y_inverted = false; can_use_mipmaps = true; } #ifdef CHECK_GL_ERROR checkGLError( "TextureLoad0" ); #endif return true; } bool SceneOpenGL::Texture::load( const Pixmap& pix, const QSize& size, int depth ) { return load( pix, size, depth, QRegion( 0, 0, size.width(), size.height())); } bool SceneOpenGL::Texture::load( const QImage& image, GLenum target ) { if( image.isNull()) return false; return load( QPixmap::fromImage( image ), target ); } bool SceneOpenGL::Texture::load( const QPixmap& pixmap, GLenum target ) { Q_UNUSED( target ); // SceneOpenGL::Texture::findTarget() detects the target if( pixmap.isNull()) return false; return load( pixmap.handle(), pixmap.size(), pixmap.depth()); } void SceneOpenGL::Texture::bind() { glEnable( mTarget ); glBindTexture( mTarget, mTexture ); if( tfp_mode && options->glStrictBinding ) { assert( bound_glxpixmap != None ); glXBindTexImageEXT( display(), bound_glxpixmap, GLX_FRONT_LEFT_EXT, NULL ); } enableFilter(); + if( hasGLVersion( 1, 4, 0 )) + { + // Lod bias makes the trilinear-filtered texture look a bit sharper + glTexEnvf( GL_TEXTURE_FILTER_CONTROL, GL_TEXTURE_LOD_BIAS, -1.0f ); + } } void SceneOpenGL::Texture::unbind() { + if( hasGLVersion( 1, 4, 0 )) + { + glTexEnvf( GL_TEXTURE_FILTER_CONTROL, GL_TEXTURE_LOD_BIAS, 0.0f ); + } if( tfp_mode && options->glStrictBinding ) { assert( bound_glxpixmap != None ); glBindTexture( mTarget, mTexture ); glXReleaseTexImageEXT( display(), bound_glxpixmap, GLX_FRONT_LEFT_EXT ); } GLTexture::unbind(); } //**************************************** // SceneOpenGL::Window //**************************************** SceneOpenGL::Window::Window( Toplevel* c ) : Scene::Window( c ) , texture() { } SceneOpenGL::Window::~Window() { discardTexture(); } // Bind the window pixmap to an OpenGL texture. bool SceneOpenGL::Window::bindTexture() { if( texture.texture() != None && toplevel->damage().isEmpty()) { // texture doesn't need updating, just bind it glBindTexture( texture.target(), texture.texture()); return true; } // Get the pixmap with the window contents Pixmap pix = toplevel->windowPixmap(); if( pix == None ) return false; bool success = texture.load( pix, toplevel->size(), toplevel->depth(), toplevel->damage()); if( success ) toplevel->resetDamage( toplevel->rect()); else kDebug( 1212 ) << "Failed to bind window"; return success; } void SceneOpenGL::Window::discardTexture() { texture.discard(); } // when the window's composite pixmap is discarded, undo binding it to the texture void SceneOpenGL::Window::pixmapDiscarded() { texture.release(); } // paint the window void SceneOpenGL::Window::performPaint( int mask, QRegion region, WindowPaintData data ) { // check if there is something to paint (e.g. don't paint if the window // is only opaque and only PAINT_WINDOW_TRANSLUCENT is requested) bool opaque = isOpaque() && data.opacity == 1.0; if( mask & ( PAINT_WINDOW_OPAQUE | PAINT_WINDOW_TRANSLUCENT )) {} else if( mask & PAINT_WINDOW_OPAQUE ) { if( !opaque ) return; } else if( mask & PAINT_WINDOW_TRANSLUCENT ) { if( opaque ) return; } // paint only requested areas if( region != infiniteRegion()) // avoid integer overflow region.translate( -x(), -y()); if(( mask & ( PAINT_SCREEN_TRANSFORMED | PAINT_WINDOW_TRANSFORMED )) == 0 ) region &= shape(); if( region.isEmpty()) return; if( !bindTexture()) return; glPushMatrix(); // set texture filter if( options->smoothScale != 0 ) // default to yes { if( mask & PAINT_WINDOW_TRANSFORMED ) filter = ImageFilterGood; else if( mask & PAINT_SCREEN_TRANSFORMED ) filter = ImageFilterGood; else filter = ImageFilterFast; } else filter = ImageFilterFast; if( filter == ImageFilterGood ) { // avoid unneeded mipmap generation by only using trilinear // filtering when it actually makes a difference, that is with // minification or changed vertices if( options->smoothScale == 2 && ( data.quads.smoothNeeded() || data.xScale < 1 || data.yScale < 1 )) { texture.setFilter( GL_LINEAR_MIPMAP_LINEAR ); } else texture.setFilter( GL_LINEAR ); } else texture.setFilter( GL_NEAREST ); // do required transformations int x = toplevel->x(); int y = toplevel->y(); if( mask & PAINT_WINDOW_TRANSFORMED ) { x += data.xTranslate; y += data.yTranslate; } glTranslatef( x, y, 0 ); if(( mask & PAINT_WINDOW_TRANSFORMED ) && ( data.xScale != 1 || data.yScale != 1 )) glScalef( data.xScale, data.yScale, 1 ); region.translate( toplevel->x(), toplevel->y() ); // Back to screen coords texture.bind(); texture.enableUnnormalizedTexCoords(); WindowQuadList decoration = data.quads.select( WindowQuadDecoration ); if( data.contents_opacity != data.decoration_opacity && !decoration.isEmpty()) { prepareStates( data.opacity * data.contents_opacity, data.brightness, data.saturation, data.shader ); renderQuads( mask, region, data.quads.select( WindowQuadContents )); restoreStates( data.opacity * data.contents_opacity, data.brightness, data.saturation, data.shader ); prepareStates( data.opacity * data.decoration_opacity, data.brightness, data.saturation, data.shader ); renderQuads( mask, region, decoration ); restoreStates( data.opacity * data.decoration_opacity, data.brightness, data.saturation, data.shader ); } else { prepareStates( data.opacity * data.contents_opacity, data.brightness, data.saturation, data.shader ); renderQuads( mask, region, data.quads.select( WindowQuadContents )); renderQuads( mask, region, data.quads.select( WindowQuadDecoration )); restoreStates( data.opacity * data.contents_opacity, data.brightness, data.saturation, data.shader ); } texture.disableUnnormalizedTexCoords(); texture.unbind(); glPopMatrix(); } void SceneOpenGL::Window::renderQuads( int mask, const QRegion& region, const WindowQuadList& quads ) { if( quads.isEmpty()) return; // Render geometry float* vertices; float* texcoords; quads.makeArrays( &vertices, &texcoords ); renderGLGeometry( mask, region, quads.count() * 4, vertices, texcoords, NULL, 2, 0 ); delete[] vertices; delete[] texcoords; } void SceneOpenGL::Window::prepareStates( double opacity, double brightness, double saturation, GLShader* shader ) { if(shader) prepareShaderRenderStates( opacity, brightness, saturation, shader ); else prepareRenderStates( opacity, brightness, saturation ); } void SceneOpenGL::Window::prepareShaderRenderStates( double opacity, double brightness, double saturation, GLShader* shader ) { // setup blending of transparent windows glPushAttrib( GL_ENABLE_BIT ); bool opaque = isOpaque() && opacity == 1.0; if( !opaque ) { glEnable( GL_BLEND ); glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA ); } shader->setUniform("opacity", (float)opacity); shader->setUniform("saturation", (float)saturation); shader->setUniform("brightness", (float)brightness); } void SceneOpenGL::Window::prepareRenderStates( double opacity, double brightness, double saturation ) { // setup blending of transparent windows glPushAttrib( GL_ENABLE_BIT ); bool opaque = isOpaque() && opacity == 1.0; if( !opaque ) { glEnable( GL_BLEND ); glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA ); } if( saturation != 1.0 && texture.saturationSupported()) { // First we need to get the color from [0; 1] range to [0.5; 1] range glActiveTexture( GL_TEXTURE0 ); glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE ); glTexEnvi( GL_TEXTURE_ENV, GL_COMBINE_RGB, GL_INTERPOLATE ); glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE0_RGB, GL_TEXTURE ); glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND0_RGB, GL_SRC_COLOR ); glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE1_RGB, GL_CONSTANT ); glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND1_RGB, GL_SRC_COLOR ); glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE2_RGB, GL_CONSTANT ); glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND2_RGB, GL_SRC_ALPHA ); const float scale_constant[] = { 1.0, 1.0, 1.0, 0.5}; glTexEnvfv( GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, scale_constant ); texture.bind(); // Then we take dot product of the result of previous pass and // saturation_constant. This gives us completely unsaturated // (greyscale) image // Note that both operands have to be in range [0.5; 1] since opengl // automatically substracts 0.5 from them glActiveTexture( GL_TEXTURE1 ); float saturation_constant[] = { 0.5 + 0.5*0.30, 0.5 + 0.5*0.59, 0.5 + 0.5*0.11, saturation }; glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE ); glTexEnvi( GL_TEXTURE_ENV, GL_COMBINE_RGB, GL_DOT3_RGB ); glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE0_RGB, GL_PREVIOUS ); glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND0_RGB, GL_SRC_COLOR ); glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE1_RGB, GL_CONSTANT ); glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND1_RGB, GL_SRC_COLOR ); glTexEnvfv( GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, saturation_constant ); texture.bind(); // Finally we need to interpolate between the original image and the // greyscale image to get wanted level of saturation glActiveTexture( GL_TEXTURE2 ); glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE ); glTexEnvi( GL_TEXTURE_ENV, GL_COMBINE_RGB, GL_INTERPOLATE ); glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE0_RGB, GL_TEXTURE0 ); glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND0_RGB, GL_SRC_COLOR ); glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE1_RGB, GL_PREVIOUS ); glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND1_RGB, GL_SRC_COLOR ); glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE2_RGB, GL_CONSTANT ); glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND2_RGB, GL_SRC_ALPHA ); glTexEnvfv( GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, saturation_constant ); // Also replace alpha by primary color's alpha here glTexEnvi( GL_TEXTURE_ENV, GL_COMBINE_ALPHA, GL_REPLACE ); glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE0_ALPHA, GL_PRIMARY_COLOR ); glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND0_ALPHA, GL_SRC_ALPHA ); // And make primary color contain the wanted opacity glColor4f( opacity, opacity, opacity, opacity ); texture.bind(); if( toplevel->hasAlpha() || brightness != 1.0f ) { glActiveTexture( GL_TEXTURE3 ); glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE ); glTexEnvi( GL_TEXTURE_ENV, GL_COMBINE_RGB, GL_MODULATE ); glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE0_RGB, GL_PREVIOUS ); glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND0_RGB, GL_SRC_COLOR ); glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE1_RGB, GL_PRIMARY_COLOR ); glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND1_RGB, GL_SRC_COLOR ); if( toplevel->hasAlpha() ) { // The color has to be multiplied by both opacity and brightness float opacityByBrightness = opacity * brightness; glColor4f( opacityByBrightness, opacityByBrightness, opacityByBrightness, opacity ); // Also multiply original texture's alpha by our opacity glTexEnvi( GL_TEXTURE_ENV, GL_COMBINE_ALPHA, GL_MODULATE ); glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE0_ALPHA, GL_TEXTURE0 ); glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND0_ALPHA, GL_SRC_ALPHA ); glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE1_ALPHA, GL_PRIMARY_COLOR ); glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND1_ALPHA, GL_SRC_ALPHA ); } else { // Color has to be multiplied only by brightness glColor4f( brightness, brightness, brightness, opacity ); // Alpha will be taken from previous stage glTexEnvi( GL_TEXTURE_ENV, GL_COMBINE_ALPHA, GL_REPLACE ); glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE0_ALPHA, GL_PREVIOUS ); glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND0_ALPHA, GL_SRC_ALPHA ); } texture.bind(); } glActiveTexture(GL_TEXTURE0 ); } else if( opacity != 1.0 || brightness != 1.0 ) { // the window is additionally configured to have its opacity adjusted, // do it if( toplevel->hasAlpha()) { float opacityByBrightness = opacity * brightness; glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE ); glColor4f( opacityByBrightness, opacityByBrightness, opacityByBrightness, opacity); } else { // Multiply color by brightness and replace alpha by opacity float constant[] = { brightness, brightness, brightness, opacity }; glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE ); glTexEnvi( GL_TEXTURE_ENV, GL_COMBINE_RGB, GL_MODULATE ); glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE0_RGB, GL_TEXTURE ); glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND0_RGB, GL_SRC_COLOR ); glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE1_RGB, GL_CONSTANT ); glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND1_RGB, GL_SRC_COLOR ); glTexEnvi( GL_TEXTURE_ENV, GL_COMBINE_ALPHA, GL_REPLACE ); glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE0_ALPHA, GL_CONSTANT ); glTexEnvfv( GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, constant ); } } } void SceneOpenGL::Window::restoreStates( double opacity, double brightness, double saturation, GLShader* shader ) { if(shader) restoreShaderRenderStates( opacity, brightness, saturation, shader ); else restoreRenderStates( opacity, brightness, saturation ); } void SceneOpenGL::Window::restoreShaderRenderStates( double opacity, double brightness, double saturation, GLShader* shader ) { Q_UNUSED( opacity ); Q_UNUSED( brightness ); Q_UNUSED( saturation ); Q_UNUSED( shader ); glPopAttrib(); // ENABLE_BIT } void SceneOpenGL::Window::restoreRenderStates( double opacity, double brightness, double saturation ) { if( opacity != 1.0 || saturation != 1.0 || brightness != 1.0f ) { if( saturation != 1.0 && texture.saturationSupported()) { glActiveTexture(GL_TEXTURE3); glDisable( texture.target()); glActiveTexture(GL_TEXTURE2); glDisable( texture.target()); glActiveTexture(GL_TEXTURE1); glDisable( texture.target()); glActiveTexture(GL_TEXTURE0); } glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE ); glColor4f( 0, 0, 0, 0 ); } glPopAttrib(); // ENABLE_BIT } } // namespace #endif