426 lines
14 KiB
C++
426 lines
14 KiB
C++
/*****************************************************************
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KWin - the KDE window manager
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This file is part of the KDE project.
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Copyright (C) 2006 Lubos Lunak <l.lunak@kde.org>
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You can Freely distribute this program under the GNU General Public
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License. See the file "COPYING" for the exact licensing terms.
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******************************************************************/
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/*
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This is the XRender-based compositing code. The primary compositing
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backend is the OpenGL-based one, which should be more powerful
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and also possibly better documented. This backend is mostly for cases
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when the OpenGL backend cannot be used for some reason (insufficient
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performance, no usable OpenGL support at all, etc.)
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The plan is to keep it around as long as needed/possible, but if it
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proves to be too much hassle it will be dropped in the future.
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Docs:
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XRender (the protocol, but the function calls map to it):
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http://gitweb.freedesktop.org/?p=xorg/doc/xorg-docs.git;a=blob_plain;hb=HEAD;f=specs/Render/protocol
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XFixes (again, the protocol):
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http://gitweb.freedesktop.org/?p=xorg/doc/xorg-docs.git;a=blob_plain;hb=HEAD;f=specs/Fixes/protocol
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*/
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#include "scene_xrender.h"
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#ifdef HAVE_XRENDER
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#include "toplevel.h"
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#include "client.h"
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#include "effects.h"
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namespace KWinInternal
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{
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//****************************************
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// SceneXrender
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//****************************************
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// kDebug() support for the XserverRegion type
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struct RegionDebug
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{
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RegionDebug( XserverRegion r ) : rr( r ) {}
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XserverRegion rr;
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};
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#ifdef NDEBUG
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inline
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kndbgstream& operator<<( kndbgstream& stream, RegionDebug ) { return stream; }
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#else
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kdbgstream& operator<<( kdbgstream& stream, RegionDebug r )
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{
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if( r.rr == None )
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return stream << "EMPTY";
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int num;
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XRectangle* rects = XFixesFetchRegion( display(), r.rr, &num );
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if( rects == NULL || num == 0 )
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return stream << "EMPTY";
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for( int i = 0;
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i < num;
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++i )
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stream << "[" << rects[ i ].x << "+" << rects[ i ].y << " " << rects[ i ].width << "x" << rects[ i ].height << "]";
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return stream;
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}
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#endif
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Picture SceneXrender::buffer;
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ScreenPaintData SceneXrender::screen_paint;
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SceneXrender::SceneXrender( Workspace* ws )
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: Scene( ws )
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{
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// create XRender picture for the root window
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format = XRenderFindVisualFormat( display(), DefaultVisual( display(), DefaultScreen( display())));
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if( wspace->createOverlay())
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{
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wspace->setupOverlay( None );
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front = XRenderCreatePicture( display(), wspace->overlayWindow(), format, 0, NULL );
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}
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else
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{
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XRenderPictureAttributes pa;
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pa.subwindow_mode = IncludeInferiors;
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front = XRenderCreatePicture( display(), rootWindow(), format, CPSubwindowMode, &pa );
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}
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createBuffer();
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}
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SceneXrender::~SceneXrender()
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{
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XRenderFreePicture( display(), front );
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XRenderFreePicture( display(), buffer );
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wspace->destroyOverlay();
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for( QMap< Toplevel*, Window >::Iterator it = windows.begin();
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it != windows.end();
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++it )
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(*it).free();
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}
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// the entry point for painting
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void SceneXrender::paint( QRegion damage, ToplevelList toplevels )
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{
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foreach( Toplevel* c, toplevels )
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{
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assert( windows.contains( c ));
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stacking_order.append( &windows[ c ] );
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}
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int mask = 0;
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paintScreen( &mask, &damage );
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if( mask & PAINT_SCREEN_REGION )
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{
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// Use the damage region as the clip region for the root window
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XserverRegion front_region = toXserverRegion( damage );
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XFixesSetPictureClipRegion( display(), front, 0, 0, front_region );
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XFixesDestroyRegion( display(), front_region );
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// copy composed buffer to the root window
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XFixesSetPictureClipRegion( display(), buffer, 0, 0, None );
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XRenderComposite( display(), PictOpSrc, buffer, None, front, 0, 0, 0, 0, 0, 0, displayWidth(), displayHeight());
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XFixesSetPictureClipRegion( display(), front, 0, 0, None );
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XFlush( display());
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}
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else
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{
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// copy composed buffer to the root window
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XRenderComposite( display(), PictOpSrc, buffer, None, front, 0, 0, 0, 0, 0, 0, displayWidth(), displayHeight());
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XFlush( display());
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}
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// do cleanup
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stacking_order.clear();
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}
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void SceneXrender::paintGenericScreen( int mask, ScreenPaintData data )
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{
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screen_paint = data; // save, transformations will be done when painting windows
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Scene::paintGenericScreen( mask, data );
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}
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// fill the screen background
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void SceneXrender::paintBackground( QRegion region )
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{
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if( region != infiniteRegion())
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{
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XserverRegion background_region = toXserverRegion( region );
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XFixesSetPictureClipRegion( display(), buffer, 0, 0, background_region );
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XFixesDestroyRegion( display(), background_region );
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}
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XRenderColor col = { 0xffff, 0xffff, 0xffff, 0xffff };
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XRenderFillRectangle( display(), PictOpSrc, buffer, &col, 0, 0, displayWidth(), displayHeight());
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XFixesSetPictureClipRegion( display(), buffer, 0, 0, None );
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}
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void SceneXrender::windowGeometryShapeChanged( Toplevel* c )
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{
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if( !windows.contains( c )) // this is ok, shape is not valid by default
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return;
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Window& w = windows[ c ];
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w.discardPicture();
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w.discardShape();
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w.discardAlpha();
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}
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void SceneXrender::windowOpacityChanged( Toplevel* c )
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{
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if( !windows.contains( c )) // this is ok, alpha is created on demand
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return;
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Window& w = windows[ c ];
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w.discardAlpha();
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}
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void SceneXrender::windowDeleted( Toplevel* c )
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{
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assert( windows.contains( c ));
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windows[ c ].free();
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windows.remove( c );
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}
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void SceneXrender::windowAdded( Toplevel* c )
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{
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assert( !windows.contains( c ));
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windows[ c ] = Window( c );
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}
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// Create the compositing buffer. The root window is not double-buffered,
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// so it is done manually using this buffer,
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void SceneXrender::createBuffer()
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{
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if( buffer != None )
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XRenderFreePicture( display(), buffer );
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Pixmap pixmap = XCreatePixmap( display(), rootWindow(), displayWidth(), displayHeight(), QX11Info::appDepth());
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buffer = XRenderCreatePicture( display(), pixmap, format, 0, 0 );
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XFreePixmap( display(), pixmap ); // The picture owns the pixmap now
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}
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// Convert QRegion to XserverRegion. This code uses XserverRegion
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// only when really necessary as the shared implementation uses
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// QRegion.
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XserverRegion SceneXrender::toXserverRegion( QRegion region )
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{
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QVector< QRect > rects = region.rects();
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XRectangle* xr = new XRectangle[ rects.count() ];
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for( int i = 0;
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i < rects.count();
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++i )
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{
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xr[ i ].x = rects[ i ].x();
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xr[ i ].y = rects[ i ].y();
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xr[ i ].width = rects[ i ].width();
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xr[ i ].height = rects[ i ].height();
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}
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XserverRegion ret = XFixesCreateRegion( display(), xr, rects.count());
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delete[] xr;
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return ret;
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}
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//****************************************
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// SceneXrender::Window
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//****************************************
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SceneXrender::Window::Window( Toplevel* c )
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: Scene::Window( c )
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, _picture( None )
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, format( XRenderFindVisualFormat( display(), c->visual()))
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, alpha( None )
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{
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}
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void SceneXrender::Window::free()
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{
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discardPicture();
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discardAlpha();
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discardShape();
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}
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// Create XRender picture for the pixmap with the window contents.
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Picture SceneXrender::Window::picture()
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{
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if( !toplevel->damage().isEmpty() && _picture != None )
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{
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XRenderFreePicture( display(), _picture );
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_picture = None;
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}
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if( _picture == None && format != NULL )
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{
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// Get the pixmap with the window contents.
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Pixmap window_pix = toplevel->createWindowPixmap();
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Pixmap pix = window_pix;
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// HACK the same alpha clear hack like with opengl, see there
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Client* c = dynamic_cast< Client* >( toplevel );
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bool alpha_clear = c != NULL && c->hasAlpha() && !c->noBorder();
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#define ALPHA_CLEAR_COPY
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#ifdef ALPHA_CLEAR_COPY
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if( alpha_clear )
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{
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Pixmap p2 = XCreatePixmap( display(), pix, c->width(), c->height(), 32 );
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GC gc = XCreateGC( display(), pix, 0, NULL );
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XCopyArea( display(), pix, p2, gc, 0, 0, c->width(), c->height(), 0, 0 );
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pix = p2;
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XFreeGC( display(), gc );
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}
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#endif
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if( alpha_clear )
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{
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XGCValues gcv;
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gcv.foreground = 0xff000000;
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gcv.plane_mask = 0xff000000;
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GC gc = XCreateGC( display(), pix, GCPlaneMask | GCForeground, &gcv );
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XFillRectangle( display(), pix, gc, 0, 0, c->width(), c->clientPos().y());
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XFillRectangle( display(), pix, gc, 0, 0, c->clientPos().x(), c->height());
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int tw = c->clientPos().x() + c->clientSize().width();
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int th = c->clientPos().y() + c->clientSize().height();
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XFillRectangle( display(), pix, gc, 0, th, c->width(), c->height() - th );
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XFillRectangle( display(), pix, gc, tw, 0, c->width() - tw, c->height());
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XFreeGC( display(), gc );
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}
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_picture = XRenderCreatePicture( display(), pix, format, 0, 0 );
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XFreePixmap( display(), pix ); // the picture owns the pixmap
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#ifdef ALPHA_CLEAR_COPY
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if( alpha_clear )
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XFreePixmap( display(), window_pix );
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#endif
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toplevel->resetDamage( toplevel->rect());
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}
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return _picture;
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}
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void SceneXrender::Window::discardPicture()
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{
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if( _picture != None )
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XRenderFreePicture( display(), _picture );
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_picture = None;
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}
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void SceneXrender::Window::discardAlpha()
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{
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if( alpha != None )
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XRenderFreePicture( display(), alpha );
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alpha = None;
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}
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// Create XRender picture for the alpha mask.
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Picture SceneXrender::Window::alphaMask( double opacity )
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{
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if( isOpaque() && opacity == 1.0 )
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return None;
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if( alpha != None && alpha_cached_opacity != opacity )
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{
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if( alpha != None )
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XRenderFreePicture( display(), alpha );
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alpha = None;
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}
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if( alpha != None )
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return alpha;
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if( opacity == 1.0 )
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{ // no need to create alpha mask
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alpha_cached_opacity = 1.0;
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return None;
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}
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// Create a 1x1 8bpp pixmap containing the given opacity in the alpha channel.
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Pixmap pixmap = XCreatePixmap( display(), rootWindow(), 1, 1, 8 );
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XRenderPictFormat* format = XRenderFindStandardFormat( display(), PictStandardA8 );
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XRenderPictureAttributes pa;
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pa.repeat = True;
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alpha = XRenderCreatePicture( display(), pixmap, format, CPRepeat, &pa );
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XFreePixmap( display(), pixmap );
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XRenderColor col;
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col.alpha = int( opacity * 0xffff );
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alpha_cached_opacity = opacity;
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XRenderFillRectangle( display(), PictOpSrc, alpha, &col, 0, 0, 1, 1 );
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return alpha;
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}
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// paint the window
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void SceneXrender::Window::performPaint( int mask, QRegion region, WindowPaintData data )
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{
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// check if there is something to paint
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bool opaque = isOpaque() && data.opacity == 1.0;
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if( mask & ( PAINT_WINDOW_OPAQUE | PAINT_WINDOW_TRANSLUCENT ))
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{}
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else if( mask & PAINT_WINDOW_OPAQUE )
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{
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if( !opaque )
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return;
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}
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else if( mask & PAINT_WINDOW_TRANSLUCENT )
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{
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if( opaque )
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return;
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}
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if( region != infiniteRegion())
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{
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XserverRegion clip_region = toXserverRegion( region );
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XFixesSetPictureClipRegion( display(), buffer, 0, 0, clip_region );
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XFixesDestroyRegion( display(), clip_region );
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}
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Picture pic = picture(); // get XRender picture
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if( pic == None ) // The render format can be null for GL and/or Xv visuals
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return;
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// do required transformations
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int x = toplevel->x();
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int y = toplevel->y();
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int width = toplevel->width();
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int height = toplevel->height();
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double xscale = 1;
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double yscale = 1;
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if( mask & PAINT_WINDOW_TRANSFORMED )
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{
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xscale *= data.xScale;
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yscale *= data.yScale;
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x += data.xTranslate;
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y += data.yTranslate;
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}
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if( mask & PAINT_SCREEN_TRANSFORMED )
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{
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xscale *= screen_paint.xScale;
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yscale *= screen_paint.yScale;
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x = int( x * screen_paint.xScale );
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y = int( y * screen_paint.yScale );
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x += screen_paint.xTranslate;
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y += screen_paint.yTranslate;
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}
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if( yscale != 1 || xscale != 1 )
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{
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XTransform xform = {{
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{ XDoubleToFixed( 1 / xscale ), XDoubleToFixed( 0 ), XDoubleToFixed( 0 ) },
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{ XDoubleToFixed( 0 ), XDoubleToFixed( 1 / yscale ), XDoubleToFixed( 0 ) },
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{ XDoubleToFixed( 0 ), XDoubleToFixed( 0 ), XDoubleToFixed( 1 ) }
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}};
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XRenderSetPictureTransform( display(), pic, &xform );
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width = (int)(width * xscale);
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height = (int)(height * yscale);
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if( options->smoothScale == 1 ) // only when forced, it's slow
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XRenderSetPictureFilter( display(), pic, "good", NULL, 0 );
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}
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if( opaque )
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{
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XRenderComposite( display(), PictOpSrc, pic, None, buffer, 0, 0, 0, 0,
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x, y, width, height);
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}
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else
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{
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Picture alpha = alphaMask( data.opacity );
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XRenderComposite( display(), PictOpOver, pic, alpha, buffer, 0, 0, 0, 0,
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x, y, width, height);
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}
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if( xscale != 1 || yscale != 1 )
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{
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XTransform xform = {{
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{ XDoubleToFixed( 1 ), XDoubleToFixed( 0 ), XDoubleToFixed( 0 ) },
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{ XDoubleToFixed( 0 ), XDoubleToFixed( 1 ), XDoubleToFixed( 0 ) },
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{ XDoubleToFixed( 0 ), XDoubleToFixed( 0 ), XDoubleToFixed( 1 ) }
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}};
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XRenderSetPictureTransform( display(), pic, &xform );
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if( options->smoothScale == 1 )
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XRenderSetPictureFilter( display(), pic, "fast", NULL, 0 );
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}
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XFixesSetPictureClipRegion( display(), buffer, 0, 0, None );
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}
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} // namespace
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#endif
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