101 lines
3.5 KiB
C++
101 lines
3.5 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#pragma once
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#include <sal/config.h>
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#include <osl/endian.h>
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#include <vcl/vclptr.hxx>
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#include <config_cairo_rgba.h>
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#include <memory>
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// Using formats that match cairo's formats.
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// SVP_24BIT_FORMAT is used to store 24-bit images in 3-byte pixels to conserve memory.
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/*
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For internal cairo we have the option --enable-cairo-rgba which is potentially
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useful for Android or Online to switch the rgb components. For Android cairo then
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matches the OpenGL GL_RGBA format so we can use it there where we don't have
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GL_BGRA support. Similarly for Online we can then use cairo's pixel data
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without needing to swizzle it for use as a canvas ImageData.
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*/
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#if ENABLE_CAIRO_RGBA
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#define SVP_24BIT_FORMAT (ScanlineFormat::N24BitTcRgb)
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#define SVP_CAIRO_FORMAT (ScanlineFormat::N32BitTcRgba)
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#define SVP_CAIRO_BLUE 1
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#define SVP_CAIRO_GREEN 2
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#define SVP_CAIRO_RED 0
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#define SVP_CAIRO_ALPHA 3
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#elif defined OSL_BIGENDIAN
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#define SVP_24BIT_FORMAT (ScanlineFormat::N24BitTcRgb)
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#define SVP_CAIRO_FORMAT (ScanlineFormat::N32BitTcArgb)
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#define SVP_CAIRO_BLUE 3
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#define SVP_CAIRO_GREEN 2
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#define SVP_CAIRO_RED 1
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#define SVP_CAIRO_ALPHA 0
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#else
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#define SVP_24BIT_FORMAT (ScanlineFormat::N24BitTcBgr)
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#define SVP_CAIRO_FORMAT (ScanlineFormat::N32BitTcBgra)
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#define SVP_CAIRO_BLUE 0
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#define SVP_CAIRO_GREEN 1
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#define SVP_CAIRO_RED 2
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#define SVP_CAIRO_ALPHA 3
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#endif
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typedef struct _cairo_surface cairo_surface_t;
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typedef struct _cairo cairo_t;
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class VirtualDevice;
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namespace cairo {
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typedef std::shared_ptr<cairo_surface_t> CairoSurfaceSharedPtr;
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typedef std::shared_ptr<cairo_t> CairoSharedPtr;
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struct Surface;
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typedef std::shared_ptr<Surface> SurfaceSharedPtr;
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/** Cairo surface interface
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For each cairo-supported platform, there's an implementation of
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this interface
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*/
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struct Surface
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{
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public:
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virtual ~Surface() {}
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// Query methods
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virtual CairoSharedPtr getCairo() const = 0;
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virtual CairoSurfaceSharedPtr getCairoSurface() const = 0;
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virtual SurfaceSharedPtr getSimilar(int cairo_content_type, int width, int height) const = 0;
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/// factory for VirDev on this surface
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virtual VclPtr<VirtualDevice> createVirtualDevice() const = 0;
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/// Resize the surface (possibly destroying content), only possible for X11 typically
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/// so on failure caller must create a new surface instead
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virtual bool Resize( int /*width*/, int /*height*/ ) { return false; }
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/// Flush all pending output to surface
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virtual void flush() const = 0;
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};
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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