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Diffstat (limited to 'vcl/inc/headless/CairoCommon.hxx')
| -rw-r--r-- | vcl/inc/headless/CairoCommon.hxx | 230 |
1 files changed, 230 insertions, 0 deletions
diff --git a/vcl/inc/headless/CairoCommon.hxx b/vcl/inc/headless/CairoCommon.hxx new file mode 100644 index 000000000..e8b1a4927 --- /dev/null +++ b/vcl/inc/headless/CairoCommon.hxx @@ -0,0 +1,230 @@ +/* -*- 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 . + */ + +#pragma once + +#include <sal/config.h> +#include <config_features.h> + +#include <cairo.h> + +#include <vcl/dllapi.h> +#include <vcl/region.hxx> +#include <vcl/salgtype.hxx> +#include <vcl/BitmapBuffer.hxx> + +#include <com/sun/star/drawing/LineCap.hpp> + +#include <basegfx/utils/systemdependentdata.hxx> +#include <basegfx/range/b2drange.hxx> +#include <basegfx/range/b2irange.hxx> +#include <basegfx/matrix/b2dhommatrix.hxx> +#include <basegfx/polygon/b2dpolypolygon.hxx> +#include <basegfx/polygon/b2dpolygon.hxx> + +#include <unordered_map> + +//Using formats that match cairo's formats. For android we patch cairo, +//which is internal in that case, to swap the rgb components so that +//cairo then matches the OpenGL GL_RGBA format so we can use it there +//where we don't have GL_BGRA support. +// SVP_24BIT_FORMAT is used to store 24-bit images in 3-byte pixels to conserve memory. +#if defined(ANDROID) && !HAVE_FEATURE_ANDROID_LOK +#define SVP_24BIT_FORMAT (ScanlineFormat::N24BitTcRgb | ScanlineFormat::TopDown) +#define SVP_CAIRO_FORMAT (ScanlineFormat::N32BitTcRgba | ScanlineFormat::TopDown) +#define SVP_CAIRO_BLUE 1 +#define SVP_CAIRO_GREEN 2 +#define SVP_CAIRO_RED 0 +#define SVP_CAIRO_ALPHA 3 +#elif defined OSL_BIGENDIAN +#define SVP_24BIT_FORMAT (ScanlineFormat::N24BitTcRgb | ScanlineFormat::TopDown) +#define SVP_CAIRO_FORMAT (ScanlineFormat::N32BitTcArgb | ScanlineFormat::TopDown) +#define SVP_CAIRO_BLUE 3 +#define SVP_CAIRO_GREEN 2 +#define SVP_CAIRO_RED 1 +#define SVP_CAIRO_ALPHA 0 +#else +#define SVP_24BIT_FORMAT (ScanlineFormat::N24BitTcBgr | ScanlineFormat::TopDown) +#define SVP_CAIRO_FORMAT (ScanlineFormat::N32BitTcBgra | ScanlineFormat::TopDown) +#define SVP_CAIRO_BLUE 0 +#define SVP_CAIRO_GREEN 1 +#define SVP_CAIRO_RED 2 +#define SVP_CAIRO_ALPHA 3 +#endif + +typedef struct _cairo cairo_t; +typedef struct _cairo_surface cairo_surface_t; +typedef struct _cairo_user_data_key cairo_user_data_key_t; + +VCL_DLLPUBLIC void dl_cairo_surface_set_device_scale(cairo_surface_t* surface, double x_scale, + double y_scale); +VCL_DLLPUBLIC void dl_cairo_surface_get_device_scale(cairo_surface_t* surface, double* x_scale, + double* y_scale); + +VCL_DLLPUBLIC basegfx::B2DRange getFillDamage(cairo_t* cr); +VCL_DLLPUBLIC basegfx::B2DRange getClipBox(cairo_t* cr); +VCL_DLLPUBLIC basegfx::B2DRange getClippedFillDamage(cairo_t* cr); +VCL_DLLPUBLIC basegfx::B2DRange getClippedStrokeDamage(cairo_t* cr); +VCL_DLLPUBLIC basegfx::B2DRange getStrokeDamage(cairo_t* cr); + +class SystemDependentData_CairoPath : public basegfx::SystemDependentData +{ +private: + // the path data itself + cairo_path_t* mpCairoPath; + + // all other values the path data is based on and + // need to be compared with to check for data validity + bool mbNoJoin; + bool mbAntiAlias; + std::vector<double> maStroke; + +public: + SystemDependentData_CairoPath(basegfx::SystemDependentDataManager& rSystemDependentDataManager, + size_t nSizeMeasure, cairo_t* cr, bool bNoJoin, bool bAntiAlias, + const std::vector<double>* pStroke); // MM01 + virtual ~SystemDependentData_CairoPath() override; + + // read access + cairo_path_t* getCairoPath() { return mpCairoPath; } + bool getNoJoin() const { return mbNoJoin; } + bool getAntiAlias() const { return mbAntiAlias; } + const std::vector<double>& getStroke() const { return maStroke; } + + virtual sal_Int64 estimateUsageInBytes() const override; +}; + +VCL_DLLPUBLIC size_t AddPolygonToPath(cairo_t* cr, const basegfx::B2DPolygon& rPolygon, + const basegfx::B2DHomMatrix& rObjectToDevice, bool bPixelSnap, + bool bPixelSnapHairline); + +VCL_DLLPUBLIC basegfx::B2DPoint impPixelSnap(const basegfx::B2DPolygon& rPolygon, + const basegfx::B2DHomMatrix& rObjectToDevice, + basegfx::B2DHomMatrix& rObjectToDeviceInv, + sal_uInt32 nIndex); + +VCL_DLLPUBLIC void add_polygon_path(cairo_t* cr, const basegfx::B2DPolyPolygon& rPolyPolygon, + const basegfx::B2DHomMatrix& rObjectToDevice, bool bPixelSnap); + +VCL_DLLPUBLIC cairo_format_t getCairoFormat(const BitmapBuffer& rBuffer); + +VCL_DLLPUBLIC std::unique_ptr<BitmapBuffer> +FastConvert24BitRgbTo32BitCairo(const BitmapBuffer* pSrc); + +VCL_DLLPUBLIC void Toggle1BitTransparency(const BitmapBuffer& rBuf); + +enum class PaintMode +{ + Over, + Xor +}; + +typedef void (*damageHandler)(void* handle, sal_Int32 nExtentsX, sal_Int32 nExtentsY, + sal_Int32 nExtentsWidth, sal_Int32 nExtentsHeight); + +struct VCL_DLLPUBLIC DamageHandler +{ + void* handle; + damageHandler damaged; +}; + +struct VCL_DLLPUBLIC CairoCommon +{ + cairo_surface_t* m_pSurface; + basegfx::B2IVector m_aFrameSize; + vcl::Region m_aClipRegion; + Color m_aLineColor; + Color m_aFillColor; + PaintMode m_ePaintMode; + double m_fScale; + + CairoCommon() + : m_pSurface(nullptr) + , m_aLineColor(Color(0x00, 0x00, 0x00)) + , m_aFillColor(Color(0xFF, 0xFF, 0XFF)) + , m_ePaintMode(PaintMode::Over) + , m_fScale(1.0) + { + } + + static cairo_user_data_key_t* getDamageKey(); + + cairo_surface_t* getSurface() const { return m_pSurface; } + + cairo_t* getCairoContext(bool bXorModeAllowed, bool bAntiAlias) const; + void releaseCairoContext(cairo_t* cr, bool bXorModeAllowed, + const basegfx::B2DRange& rExtents) const; + cairo_t* createTmpCompatibleCairoContext() const; + + void applyColor(cairo_t* cr, Color rColor, double fTransparency = 0.0); + void clipRegion(cairo_t* cr); + static void clipRegion(cairo_t* cr, const vcl::Region& rClipRegion); + + // need this static version of ::drawPolyLine for usage from + // vcl/unx/generic/gdi/salgdi.cxx. It gets wrapped by + // ::drawPolyLine with some added parameters (see there) + static bool drawPolyLine(cairo_t* cr, basegfx::B2DRange* pExtents, const Color& rLineColor, + bool bAntiAlias, const basegfx::B2DHomMatrix& rObjectToDevice, + const basegfx::B2DPolygon& rPolyLine, double fTransparency, + double fLineWidth, const std::vector<double>* pStroke, + basegfx::B2DLineJoin eLineJoin, css::drawing::LineCap eLineCap, + double fMiterMinimumAngle, bool bPixelSnapHairline); + + void copyWithOperator(const SalTwoRect& rTR, cairo_surface_t* source, cairo_operator_t eOp, + bool bAntiAlias); + + void copySource(const SalTwoRect& rTR, cairo_surface_t* source, bool bAntiAlias); + + static basegfx::B2DRange renderSource(cairo_t* cr, const SalTwoRect& rTR, + cairo_surface_t* source); + + void copyBitsCairo(const SalTwoRect& rTR, cairo_surface_t* pSourceSurface, bool bAntiAlias); + + void invert(const basegfx::B2DPolygon& rPoly, SalInvert nFlags, bool bAntiAlias); + + static cairo_surface_t* createCairoSurface(const BitmapBuffer* pBuffer); +}; + +class SurfaceHelper +{ +private: + cairo_surface_t* pSurface; + std::unordered_map<sal_uInt64, cairo_surface_t*> maDownscaled; + + SurfaceHelper(const SurfaceHelper&) = delete; + SurfaceHelper& operator=(const SurfaceHelper&) = delete; + + cairo_surface_t* implCreateOrReuseDownscale(unsigned long nTargetWidth, + unsigned long nTargetHeight); + +protected: + cairo_surface_t* implGetSurface() const { return pSurface; } + void implSetSurface(cairo_surface_t* pNew) { pSurface = pNew; } + + bool isTrivial() const; + +public: + explicit SurfaceHelper(); + ~SurfaceHelper(); + + cairo_surface_t* getSurface(unsigned long nTargetWidth = 0, + unsigned long nTargetHeight = 0) const; +}; + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |