74963f6547
since:
commit 4998de76ed
Date: Sun Jul 30 07:40:48 2023 +0000
tdf#156230: Drop freshly unused GenPspGfxBackend
Change-Id: I7fc2a068f807777ed392c5d58772d130bf7f51c8
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/155076
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolan.mcnamara@collabora.com>
441 lines
18 KiB
C++
441 lines
18 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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#ifndef INCLUDED_VCL_SKIA_GDIIMPL_HXX
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#define INCLUDED_VCL_SKIA_GDIIMPL_HXX
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#include <vcl/dllapi.h>
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#include <salgdiimpl.hxx>
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#include <salgeom.hxx>
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#include <skia/utils.hxx>
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#include <SkPaint.h>
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#include <SkBlendMode.h>
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#include <optional>
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class SkiaFlushIdle;
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class GenericSalLayout;
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class SkFont;
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class SkiaSalBitmap;
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class VCL_DLLPUBLIC SkiaSalGraphicsImpl : public SalGraphicsImpl
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{
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public:
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SkiaSalGraphicsImpl(SalGraphics& pParent, SalGeometryProvider* pProvider);
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virtual ~SkiaSalGraphicsImpl() override;
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virtual void Init() override;
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virtual void DeInit() override;
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virtual OUString getRenderBackendName() const override { return "skia"; }
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const vcl::Region& getClipRegion() const;
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virtual void setClipRegion(const vcl::Region&) override;
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//
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// get the depth of the device
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virtual sal_uInt16 GetBitCount() const override;
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// get the width of the device
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virtual tools::Long GetGraphicsWidth() const override;
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// set the clip region to empty
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virtual void ResetClipRegion() override;
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// set the line color to transparent (= don't draw lines)
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virtual void SetLineColor() override;
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// set the line color to a specific color
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virtual void SetLineColor(Color nColor) override;
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// set the fill color to transparent (= don't fill)
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virtual void SetFillColor() override;
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// set the fill color to a specific color, shapes will be
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// filled accordingly
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virtual void SetFillColor(Color nColor) override;
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// enable/disable XOR drawing
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virtual void SetXORMode(bool bSet, bool bInvertOnly) override;
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// set line color for raster operations
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virtual void SetROPLineColor(SalROPColor nROPColor) override;
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// set fill color for raster operations
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virtual void SetROPFillColor(SalROPColor nROPColor) override;
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// draw --> LineColor and FillColor and RasterOp and ClipRegion
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virtual void drawPixel(tools::Long nX, tools::Long nY) override;
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virtual void drawPixel(tools::Long nX, tools::Long nY, Color nColor) override;
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virtual void drawLine(tools::Long nX1, tools::Long nY1, tools::Long nX2,
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tools::Long nY2) override;
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virtual void drawRect(tools::Long nX, tools::Long nY, tools::Long nWidth,
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tools::Long nHeight) override;
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virtual void drawPolyLine(sal_uInt32 nPoints, const Point* pPtAry) override;
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virtual void drawPolygon(sal_uInt32 nPoints, const Point* pPtAry) override;
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virtual void drawPolyPolygon(sal_uInt32 nPoly, const sal_uInt32* pPoints,
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const Point** pPtAry) override;
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virtual void drawPolyPolygon(const basegfx::B2DHomMatrix& rObjectToDevice,
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const basegfx::B2DPolyPolygon&, double fTransparency) override;
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virtual bool drawPolyLine(const basegfx::B2DHomMatrix& rObjectToDevice,
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const basegfx::B2DPolygon&, double fTransparency, double fLineWidth,
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const std::vector<double>* pStroke, basegfx::B2DLineJoin,
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css::drawing::LineCap, double fMiterMinimumAngle,
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bool bPixelSnapHairline) override;
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virtual bool drawPolyLineBezier(sal_uInt32 nPoints, const Point* pPtAry,
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const PolyFlags* pFlgAry) override;
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virtual bool drawPolygonBezier(sal_uInt32 nPoints, const Point* pPtAry,
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const PolyFlags* pFlgAry) override;
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virtual bool drawPolyPolygonBezier(sal_uInt32 nPoly, const sal_uInt32* pPoints,
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const Point* const* pPtAry,
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const PolyFlags* const* pFlgAry) override;
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// CopyArea --> No RasterOp, but ClipRegion
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virtual void copyArea(tools::Long nDestX, tools::Long nDestY, tools::Long nSrcX,
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tools::Long nSrcY, tools::Long nSrcWidth, tools::Long nSrcHeight,
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bool bWindowInvalidate) override;
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virtual void copyBits(const SalTwoRect& rPosAry, SalGraphics* pSrcGraphics) override;
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virtual bool blendBitmap(const SalTwoRect&, const SalBitmap& rBitmap) override;
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virtual bool blendAlphaBitmap(const SalTwoRect&, const SalBitmap& rSrcBitmap,
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const SalBitmap& rMaskBitmap,
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const SalBitmap& rAlphaBitmap) override;
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virtual void drawBitmap(const SalTwoRect& rPosAry, const SalBitmap& rSalBitmap) override;
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virtual void drawBitmap(const SalTwoRect& rPosAry, const SalBitmap& rSalBitmap,
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const SalBitmap& rMaskBitmap) override;
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virtual void drawMask(const SalTwoRect& rPosAry, const SalBitmap& rSalBitmap,
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Color nMaskColor) override;
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virtual std::shared_ptr<SalBitmap> getBitmap(tools::Long nX, tools::Long nY, tools::Long nWidth,
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tools::Long nHeight) override;
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virtual Color getPixel(tools::Long nX, tools::Long nY) override;
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// invert --> ClipRegion (only Windows or VirDevs)
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virtual void invert(tools::Long nX, tools::Long nY, tools::Long nWidth, tools::Long nHeight,
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SalInvert nFlags) override;
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virtual void invert(sal_uInt32 nPoints, const Point* pPtAry, SalInvert nFlags) override;
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virtual bool drawEPS(tools::Long nX, tools::Long nY, tools::Long nWidth, tools::Long nHeight,
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void* pPtr, sal_uInt32 nSize) override;
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/** Render bitmap with alpha channel
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@param rSourceBitmap
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Source bitmap to blit
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@param rAlphaBitmap
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Alpha channel to use for blitting
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@return true, if the operation succeeded, and false
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otherwise. In this case, clients should try to emulate alpha
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compositing themselves
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*/
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virtual bool drawAlphaBitmap(const SalTwoRect&, const SalBitmap& rSourceBitmap,
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const SalBitmap& rAlphaBitmap) override;
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/** draw transformed bitmap (maybe with alpha) where Null, X, Y define the coordinate system */
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virtual bool drawTransformedBitmap(const basegfx::B2DPoint& rNull, const basegfx::B2DPoint& rX,
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const basegfx::B2DPoint& rY, const SalBitmap& rSourceBitmap,
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const SalBitmap* pAlphaBitmap, double fAlpha) override;
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virtual bool hasFastDrawTransformedBitmap() const override;
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/** Render solid rectangle with given transparency
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@param nX Top left coordinate of rectangle
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@param nY Bottom right coordinate of rectangle
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@param nWidth Width of rectangle
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@param nHeight Height of rectangle
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@param nTransparency Transparency value (0-255) to use. 0 blits and opaque, 255 a
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fully transparent rectangle
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@returns true if successfully drawn, false if not able to draw rectangle
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*/
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virtual bool drawAlphaRect(tools::Long nX, tools::Long nY, tools::Long nWidth,
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tools::Long nHeight, sal_uInt8 nTransparency) override;
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virtual bool drawGradient(const tools::PolyPolygon& rPolygon,
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const Gradient& rGradient) override;
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virtual bool implDrawGradient(const basegfx::B2DPolyPolygon& rPolyPolygon,
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const SalGradient& rGradient) override;
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virtual bool supportsOperation(OutDevSupportType eType) const override;
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// Dump contents to a file for debugging.
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void dump(const char* file) const;
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// Default blend mode for SkPaint is SkBlendMode::kSrcOver
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void drawBitmap(const SalTwoRect& rPosAry, const SkiaSalBitmap& bitmap,
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SkBlendMode blendMode = SkBlendMode::kSrcOver);
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void drawImage(const SalTwoRect& rPosAry, const sk_sp<SkImage>& aImage, int srcScaling = 1,
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SkBlendMode eBlendMode = SkBlendMode::kSrcOver);
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void drawShader(const SalTwoRect& rPosAry, const sk_sp<SkShader>& shader,
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SkBlendMode blendMode = SkBlendMode::kSrcOver);
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void drawGenericLayout(const GenericSalLayout& layout, Color textColor, const SkFont& font,
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const SkFont& verticalFont);
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protected:
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// To be called before any drawing.
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void preDraw();
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// To be called after any drawing.
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void postDraw();
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// The canvas to draw to.
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SkCanvas* getDrawCanvas() { return mSurface->getCanvas(); }
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// Call before makeImageSnapshot(), ensures the content is up to date.
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void flushDrawing();
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virtual void createSurface();
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// Call to ensure that mSurface is valid. If mSurface is going to be modified,
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// use preDraw() instead of this.
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void checkSurface();
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void destroySurface();
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// Reimplemented for X11.
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virtual bool avoidRecreateByResize() const;
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void createWindowSurface(bool forceRaster = false);
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virtual void createWindowSurfaceInternal(bool forceRaster = false) = 0;
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void createOffscreenSurface();
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virtual void flushSurfaceToWindowContext();
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void privateDrawAlphaRect(tools::Long nX, tools::Long nY, tools::Long nWidth,
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tools::Long nHeight, double nTransparency, bool blockAA = false);
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void privateCopyBits(const SalTwoRect& rPosAry, SkiaSalGraphicsImpl* src);
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void setProvider(SalGeometryProvider* provider) { mProvider = provider; }
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bool isOffscreen() const;
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bool isGPU() const { return mIsGPU; }
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void invert(basegfx::B2DPolygon const& rPoly, SalInvert eFlags);
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// Called by SkiaFlushIdle.
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void performFlush();
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void scheduleFlush();
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friend class SkiaFlushIdle;
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// get the width of the device
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int GetWidth() const { return mProvider ? mProvider->GetWidth() : 1; }
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// get the height of the device
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int GetHeight() const { return mProvider ? mProvider->GetHeight() : 1; }
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// Get the global HiDPI scaling factor.
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virtual int getWindowScaling() const;
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void addUpdateRegion(const SkRect& rect)
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{
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// Make slightly larger, just in case (rounding, antialiasing,...).
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SkIRect addedRect = rect.makeOutset(2, 2).round();
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// Using SkIRect should be enough, SkRegion would be too slow with many operations
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// and swapping to the screen is not _that_slow.
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mDirtyRect.join(addedRect);
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}
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void setCanvasScalingAndClipping();
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void resetCanvasScalingAndClipping();
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static void setCanvasClipRegion(SkCanvas* canvas, const vcl::Region& region);
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sk_sp<SkImage> mergeCacheBitmaps(const SkiaSalBitmap& bitmap, const SkiaSalBitmap* alphaBitmap,
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const Size& targetSize);
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using DirectImage = SkiaHelper::DirectImage;
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static OString makeCachedImageKey(const SkiaSalBitmap& bitmap, const SkiaSalBitmap* alphaBitmap,
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const Size& targetSize, DirectImage bitmapType,
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DirectImage alphaBitmapType);
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// Skia uses floating point coordinates, so when we use integer coordinates, sometimes
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// rounding results in off-by-one errors (down), especially when drawing using GPU,
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// see https://bugs.chromium.org/p/skia/issues/detail?id=9611 . Compensate for
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// it by using centers of pixels. Using 0.5 may sometimes round up, so go with 0.495 .
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static constexpr SkScalar toSkX(tools::Long x) { return x + 0.495; }
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static constexpr SkScalar toSkY(tools::Long y) { return y + 0.495; }
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// Value to add to be exactly in the middle of the pixel.
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static constexpr SkScalar toSkXYFix = SkScalar(0.005);
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// Perform any pending drawing such as delayed merging of polygons. Called by preDraw()
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// and anything that means the next operation cannot be another one in a series (e.g.
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// changing colors).
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void checkPendingDrawing();
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bool delayDrawPolyPolygon(const basegfx::B2DPolyPolygon& polygon, double transparency);
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void performDrawPolyPolygon(const basegfx::B2DPolyPolygon& polygon, double transparency,
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bool useAA);
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BmpScaleFlag goodScalingQuality() const { return SkiaHelper::goodScalingQuality(isGPU()); }
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SkSamplingOptions makeSamplingOptions(const SalTwoRect& rPosAry, int scalingFactor,
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int srcScalingFactor = 1)
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{
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return SkiaHelper::makeSamplingOptions(rPosAry, scalingFactor, srcScalingFactor, isGPU());
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}
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SkSamplingOptions makeSamplingOptions(const SkMatrix& matrix, int scalingFactor)
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{
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return SkiaHelper::makeSamplingOptions(goodScalingQuality(), matrix, scalingFactor);
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}
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// Create SkPaint to use when drawing to the surface. It is not to be used
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// when doing internal drawing such as when merging two bitmaps together.
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// This may apply some default settings to the paint as necessary.
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SkPaint makePaintInternal() const;
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// Create SkPaint set up for drawing lines (using mLineColor etc.).
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SkPaint makeLinePaint(double transparency = 0) const;
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// Create SkPaint set up for filling (using mFillColor etc.).
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SkPaint makeFillPaint(double transparency = 0) const;
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// Create SkPaint set up for bitmap drawing.
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SkPaint makeBitmapPaint() const;
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// Create SkPaint set up for gradient drawing.
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SkPaint makeGradientPaint() const;
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// Create SkPaint set up for text drawing.
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SkPaint makeTextPaint(std::optional<Color> color) const;
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// Create SkPaint for unspecified pixel drawing. Avoid if possible.
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SkPaint makePixelPaint(std::optional<Color> color) const;
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template <typename charT, typename traits>
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friend inline std::basic_ostream<charT, traits>&
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operator<<(std::basic_ostream<charT, traits>& stream, const SkiaSalGraphicsImpl* graphics)
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{
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if (graphics == nullptr)
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return stream << "(null)";
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// O - offscreen, G - GPU-based, R - raster
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stream << static_cast<const void*>(graphics) << " "
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<< Size(graphics->GetWidth(), graphics->GetHeight());
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if (graphics->mScaling != 1)
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stream << "*" << graphics->mScaling;
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stream << (graphics->isGPU() ? "G" : "R") << (graphics->isOffscreen() ? "O" : "");
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return stream;
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}
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void windowBackingPropertiesChanged();
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SalGraphics& mParent;
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/// Pointer to the SalFrame or SalVirtualDevice
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SalGeometryProvider* mProvider;
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// The Skia surface that is target of all the rendering.
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sk_sp<SkSurface> mSurface;
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// Note that mSurface may be a proxy surface and not the one from the window context.
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std::unique_ptr<sk_app::WindowContext> mWindowContext;
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bool mIsGPU; // whether the surface is GPU-backed
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// Note that we generally use VCL coordinates, which is not mSurface coordinates if mScaling!=1.
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SkIRect mDirtyRect; // The area that has been changed since the last performFlush().
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vcl::Region mClipRegion;
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std::optional<Color> moLineColor;
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std::optional<Color> moFillColor;
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enum class XorMode
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{
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None,
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Invert,
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Xor
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};
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XorMode mXorMode;
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std::unique_ptr<SkiaFlushIdle> mFlush;
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// Info about pending polygons to draw (we try to merge adjacent polygons into one).
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struct LastPolyPolygonInfo
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{
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basegfx::B2DPolyPolygonVector polygons;
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basegfx::B2DRange bounds;
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double transparency;
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};
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LastPolyPolygonInfo mLastPolyPolygonInfo;
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inline static int pendingOperationsToFlush = 0;
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int mScaling; // The scale factor for HiDPI screens.
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bool mInWindowBackingPropertiesChanged;
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};
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inline SkPaint SkiaSalGraphicsImpl::makePaintInternal() const
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{
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SkPaint paint;
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// Invert could be done using a blend mode like invert() does, but
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// intentionally use SkBlender to make sure it's not overwritten
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// by a blend mode set later (which would be probably a mistake),
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// and so that the drawing color does not actually matter.
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if (mXorMode == XorMode::Invert)
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SkiaHelper::setBlenderInvert(&paint);
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else if (mXorMode == XorMode::Xor)
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SkiaHelper::setBlenderXor(&paint);
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return paint;
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}
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inline SkPaint SkiaSalGraphicsImpl::makeLinePaint(double transparency) const
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{
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assert(moLineColor.has_value());
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SkPaint paint = makePaintInternal();
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paint.setColor(transparency == 0
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? SkiaHelper::toSkColor(*moLineColor)
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: SkiaHelper::toSkColorWithTransparency(*moLineColor, transparency));
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paint.setStyle(SkPaint::kStroke_Style);
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return paint;
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}
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inline SkPaint SkiaSalGraphicsImpl::makeFillPaint(double transparency) const
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{
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assert(moFillColor.has_value());
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SkPaint paint = makePaintInternal();
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paint.setColor(transparency == 0
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? SkiaHelper::toSkColor(*moFillColor)
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: SkiaHelper::toSkColorWithTransparency(*moFillColor, transparency));
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if (moLineColor == moFillColor)
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paint.setStyle(SkPaint::kStrokeAndFill_Style);
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else
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paint.setStyle(SkPaint::kFill_Style);
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return paint;
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}
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inline SkPaint SkiaSalGraphicsImpl::makeBitmapPaint() const { return makePaintInternal(); }
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inline SkPaint SkiaSalGraphicsImpl::makeGradientPaint() const { return makePaintInternal(); }
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inline SkPaint SkiaSalGraphicsImpl::makeTextPaint(std::optional<Color> color) const
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{
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assert(color.has_value());
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SkPaint paint = makePaintInternal();
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paint.setColor(SkiaHelper::toSkColor(*color));
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return paint;
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}
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inline SkPaint SkiaSalGraphicsImpl::makePixelPaint(std::optional<Color> color) const
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{
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assert(color.has_value());
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SkPaint paint = makePaintInternal();
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paint.setColor(SkiaHelper::toSkColor(*color));
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return paint;
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}
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#endif
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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