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Diffstat (limited to 'vcl/unx/generic/gdi/cairo_xlib_cairo.cxx')
| -rw-r--r-- | vcl/unx/generic/gdi/cairo_xlib_cairo.cxx | 307 |
1 files changed, 307 insertions, 0 deletions
diff --git a/vcl/unx/generic/gdi/cairo_xlib_cairo.cxx b/vcl/unx/generic/gdi/cairo_xlib_cairo.cxx new file mode 100644 index 000000000..17b34442b --- /dev/null +++ b/vcl/unx/generic/gdi/cairo_xlib_cairo.cxx @@ -0,0 +1,307 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + +#include <X11/Xlib.h> +#include <X11/extensions/Xrender.h> + +#include "cairo_xlib_cairo.hxx" + +#include <vcl/sysdata.hxx> +#include <vcl/bitmap.hxx> +#include <vcl/virdev.hxx> +#include <sal/log.hxx> + +#include <cairo-xlib.h> +#include <cairo-xlib-xrender.h> + +namespace +{ + Pixmap limitXCreatePixmap(Display *display, Drawable d, unsigned int width, unsigned int height, unsigned int depth) + { + // The X protocol request CreatePixmap puts an upper bound + // of 16 bit to the size. And in practice some drivers + // fall over with values close to the max. + + // see, e.g. moz#424333, fdo#48961, rhbz#1086714 + // we've a duplicate of this in vcl :-( + if (width > SAL_MAX_INT16-10 || height > SAL_MAX_INT16-10) + { + SAL_WARN("canvas", "overlarge pixmap: " << width << " x " << height); + return None; + } + return XCreatePixmap(display, d, width, height, depth); + } +} + +namespace cairo +{ + + X11SysData::X11SysData() : + pDisplay(nullptr), + hDrawable(0), + pVisual(nullptr), + nScreen(0), + pRenderFormat(nullptr) + {} + + X11SysData::X11SysData( const SystemGraphicsData& pSysDat ) : + pDisplay(pSysDat.pDisplay), + hDrawable(pSysDat.hDrawable), + pVisual(pSysDat.pVisual), + nScreen(pSysDat.nScreen), + pRenderFormat(pSysDat.pXRenderFormat) + {} + + X11SysData::X11SysData( const SystemEnvData& pSysDat, const SalFrame* pReference ) : + pDisplay(pSysDat.pDisplay), + hDrawable(pSysDat.GetWindowHandle(pReference)), + pVisual(pSysDat.pVisual), + nScreen(pSysDat.nScreen), + pRenderFormat(nullptr) + {} + + X11Pixmap::~X11Pixmap() + { + if( mpDisplay && mhDrawable ) + XFreePixmap( static_cast<Display*>(mpDisplay), mhDrawable ); + } + + /** + * Surface::Surface: Create Canvas surface with existing data + * @param pSysData Platform native system environment data (struct SystemEnvData in vcl/inc/sysdata.hxx) + * @param pSurface Cairo surface + * + * pSysData contains the platform native Drawable reference + * This constructor only stores data, it does no processing. + * It is used by e.g. Surface::getSimilar() + * + * Set the mpSurface as pSurface + **/ + X11Surface::X11Surface( const X11SysData& rSysData, + const X11PixmapSharedPtr& rPixmap, + const CairoSurfaceSharedPtr& pSurface ) : + maSysData(rSysData), + mpPixmap(rPixmap), + mpSurface(pSurface) + {} + + /** + * Surface::Surface: Create generic Canvas surface using given Cairo Surface + * + * @param pSurface Cairo Surface + * + * This constructor only stores data, it does no processing. + * It is used with e.g. cairo_image_surface_create_for_data() + * Unlike other constructors, mpSysData is set to NULL + * + * Set the mpSurface as pSurface + **/ + X11Surface::X11Surface( const CairoSurfaceSharedPtr& pSurface ) : + maSysData(), + mpSurface(pSurface) + {} + + /** + * Surface::Surface: Create Canvas surface from Window reference. + * @param pSysData Platform native system environment data (struct SystemEnvData in vcl/inc/sysdata.hxx) + * @param x horizontal location of the new surface + * @param y vertical location of the new surface + * @param width width of the new surface + * @param height height of the new surface + * + * pSysData contains the platform native Window reference. + * + * pSysData is used to create a surface on the Window + * + * Set the mpSurface to the new surface or NULL + **/ + X11Surface::X11Surface( const X11SysData& rSysData, int x, int y, int width, int height ) : + maSysData(rSysData), + mpSurface( + cairo_xlib_surface_create( static_cast<Display*>(rSysData.pDisplay), + rSysData.hDrawable, + static_cast<Visual*>(rSysData.pVisual), + width + x, height + y ), + &cairo_surface_destroy) + { + cairo_surface_set_device_offset(mpSurface.get(), x, y ); + } + + /** + * Surface::Surface: Create platform native Canvas surface from BitmapSystemData + * @param pSysData Platform native system environment data (struct SystemEnvData in vcl/inc/sysdata.hxx) + * @param pBmpData Platform native image data (struct BitmapSystemData in vcl/inc/bitmap.hxx) + * @param width width of the new surface + * @param height height of the new surface + * + * The pBmpData provides the imagedata that the created surface should contain. + * + * Set the mpSurface to the new surface or NULL + **/ + X11Surface::X11Surface( const X11SysData& rSysData, + const BitmapSystemData& rData ) : + maSysData( rSysData ), + mpSurface( + cairo_xlib_surface_create( static_cast<Display*>(rSysData.pDisplay), + reinterpret_cast<Drawable>(rData.aPixmap), + static_cast<Visual*>(rSysData.pVisual), + rData.mnWidth, rData.mnHeight ), + &cairo_surface_destroy) + { + } + + /** + * Surface::getCairo: Create Cairo (drawing object) for the Canvas surface + * + * @return new Cairo or NULL + **/ + CairoSharedPtr X11Surface::getCairo() const + { + return CairoSharedPtr( cairo_create(mpSurface.get()), + &cairo_destroy ); + } + + /** + * Surface::getSimilar: Create new similar Canvas surface + * @param cairo_content_type format of the new surface (cairo_content_t from cairo/src/cairo.h) + * @param width width of the new surface + * @param height height of the new surface + * + * Creates a new Canvas surface. This normally creates platform native surface, even though + * generic function is used. + * + * Cairo surface from cairo_content_type (cairo_content_t) + * + * @return new surface or NULL + **/ + SurfaceSharedPtr X11Surface::getSimilar(int cairo_content_type, int width, int height ) const + { + if( maSysData.pDisplay && maSysData.hDrawable ) + { + XRenderPictFormat* pFormat; + int nFormat; + + switch (cairo_content_type) + { + case CAIRO_CONTENT_ALPHA: + nFormat = PictStandardA8; + break; + case CAIRO_CONTENT_COLOR: + nFormat = PictStandardRGB24; + break; + case CAIRO_CONTENT_COLOR_ALPHA: + default: + nFormat = PictStandardARGB32; + break; + } + + pFormat = XRenderFindStandardFormat( static_cast<Display*>(maSysData.pDisplay), nFormat ); + Pixmap hPixmap = limitXCreatePixmap( static_cast<Display*>(maSysData.pDisplay), maSysData.hDrawable, + width > 0 ? width : 1, height > 0 ? height : 1, + pFormat->depth ); + + X11SysData aSysData(maSysData); + aSysData.pRenderFormat = pFormat; + return SurfaceSharedPtr( + new X11Surface( aSysData, + std::make_shared<X11Pixmap>(hPixmap, maSysData.pDisplay), + CairoSurfaceSharedPtr( + cairo_xlib_surface_create_with_xrender_format( + static_cast<Display*>(maSysData.pDisplay), + hPixmap, + ScreenOfDisplay(static_cast<Display *>(maSysData.pDisplay), maSysData.nScreen), + pFormat, width, height ), + &cairo_surface_destroy) )); + } + else + return SurfaceSharedPtr( + new X11Surface( maSysData, + X11PixmapSharedPtr(), + CairoSurfaceSharedPtr( + cairo_surface_create_similar( mpSurface.get(), + static_cast<cairo_content_t>(cairo_content_type), width, height ), + &cairo_surface_destroy ))); + } + + VclPtr<VirtualDevice> X11Surface::createVirtualDevice() const + { + SystemGraphicsData aSystemGraphicsData; + + cairo_surface_t* pSurface = mpSurface.get(); + + aSystemGraphicsData.nSize = sizeof(SystemGraphicsData); + aSystemGraphicsData.hDrawable = mpPixmap ? mpPixmap->mhDrawable : maSysData.hDrawable; + aSystemGraphicsData.pXRenderFormat = maSysData.pRenderFormat; + aSystemGraphicsData.pSurface = pSurface; + + int width = cairo_xlib_surface_get_width(pSurface); + int height = cairo_xlib_surface_get_height(pSurface); + + return VclPtr<VirtualDevice>::Create(aSystemGraphicsData, + Size(width, height), + getFormat()); + } + + /** + * Surface::Resize: Resizes the Canvas surface. + * @param width new width of the surface + * @param height new height of the surface + * + * Only used on X11. + * + * @return The new surface or NULL + **/ + bool X11Surface::Resize(int width, int height) + { + cairo_xlib_surface_set_size(mpSurface.get(), width, height); + return true; + } + + void X11Surface::flush() const + { + XSync( static_cast<Display*>(maSysData.pDisplay), false ); + } + + /** + * Surface::getDepth: Get the color depth of the Canvas surface. + * + * @return color depth + **/ + int X11Surface::getDepth() const + { + if (maSysData.pRenderFormat) + return static_cast<XRenderPictFormat*>(maSysData.pRenderFormat)->depth; + return -1; + } + + /** + * Surface::getFormat: Get the device format of the Canvas surface. + * + * @return color format + **/ + DeviceFormat X11Surface::getFormat() const + { + if (!maSysData.pRenderFormat) + return DeviceFormat::DEFAULT; + assert (static_cast<XRenderPictFormat*>(maSysData.pRenderFormat)->depth != 1 && "unsupported"); + return DeviceFormat::DEFAULT; + } +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |