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+/* -*- 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 <skia/gdiimpl.hxx>
+
+#include <salgdi.hxx>
+#include <skia/salbmp.hxx>
+#include <vcl/idle.hxx>
+#include <vcl/svapp.hxx>
+#include <vcl/lazydelete.hxx>
+#include <vcl/gradient.hxx>
+#include <vcl/skia/SkiaHelper.hxx>
+#include <skia/utils.hxx>
+#include <skia/zone.hxx>
+
+#include <SkBitmap.h>
+#include <SkCanvas.h>
+#include <SkGradientShader.h>
+#include <SkPath.h>
+#include <SkRegion.h>
+#include <SkPathEffect.h>
+#include <SkDashPathEffect.h>
+#include <GrBackendSurface.h>
+#include <SkTextBlob.h>
+#include <SkRSXform.h>
+
+#include <numeric>
+#include <sstream>
+
+#include <basegfx/polygon/b2dpolygontools.hxx>
+#include <basegfx/polygon/b2dpolypolygontools.hxx>
+#include <basegfx/polygon/b2dpolypolygoncutter.hxx>
+#include <o3tl/sorted_vector.hxx>
+#include <rtl/math.hxx>
+
+using namespace SkiaHelper;
+
+namespace
+{
+// Create Skia Path from B2DPolygon
+// Note that polygons generally have the complication that when used
+// for area (fill) operations they usually miss the right-most and
+// bottom-most line of pixels of the bounding rectangle (see
+// https://lists.freedesktop.org/archives/libreoffice/2019-November/083709.html).
+// So be careful with rectangle->polygon conversions (generally avoid them).
+void addPolygonToPath(const basegfx::B2DPolygon& rPolygon, SkPath& rPath, sal_uInt32 nFirstIndex,
+ sal_uInt32 nLastIndex, const sal_uInt32 nPointCount, const bool bClosePath,
+ const bool bHasCurves, bool* hasOnlyOrthogonal = nullptr)
+{
+ assert(nFirstIndex < nPointCount);
+ assert(nLastIndex <= nPointCount);
+
+ if (nPointCount <= 1)
+ return;
+
+ bool bFirst = true;
+ sal_uInt32 nPreviousIndex = nFirstIndex == 0 ? nPointCount - 1 : nFirstIndex - 1;
+ basegfx::B2DPoint aPreviousPoint = rPolygon.getB2DPoint(nPreviousIndex);
+
+ for (sal_uInt32 nIndex = nFirstIndex; nIndex <= nLastIndex; nIndex++)
+ {
+ if (nIndex == nPointCount && !bClosePath)
+ continue;
+
+ // Make sure we loop the last point to first point
+ sal_uInt32 nCurrentIndex = nIndex % nPointCount;
+ basegfx::B2DPoint aCurrentPoint = rPolygon.getB2DPoint(nCurrentIndex);
+
+ if (bFirst)
+ {
+ rPath.moveTo(aCurrentPoint.getX(), aCurrentPoint.getY());
+ bFirst = false;
+ }
+ else if (!bHasCurves)
+ {
+ rPath.lineTo(aCurrentPoint.getX(), aCurrentPoint.getY());
+ // If asked for, check whether the polygon has a line that is not
+ // strictly horizontal or vertical.
+ if (hasOnlyOrthogonal != nullptr && aCurrentPoint.getX() != aPreviousPoint.getX()
+ && aCurrentPoint.getY() != aPreviousPoint.getY())
+ *hasOnlyOrthogonal = false;
+ }
+ else
+ {
+ basegfx::B2DPoint aPreviousControlPoint = rPolygon.getNextControlPoint(nPreviousIndex);
+ basegfx::B2DPoint aCurrentControlPoint = rPolygon.getPrevControlPoint(nCurrentIndex);
+
+ if (aPreviousControlPoint.equal(aPreviousPoint)
+ && aCurrentControlPoint.equal(aCurrentPoint))
+ {
+ rPath.lineTo(aCurrentPoint.getX(), aCurrentPoint.getY()); // a straight line
+ if (hasOnlyOrthogonal != nullptr && aCurrentPoint.getX() != aPreviousPoint.getX()
+ && aCurrentPoint.getY() != aPreviousPoint.getY())
+ *hasOnlyOrthogonal = false;
+ }
+ else
+ {
+ if (aPreviousControlPoint.equal(aPreviousPoint))
+ {
+ aPreviousControlPoint
+ = aPreviousPoint + ((aPreviousControlPoint - aCurrentPoint) * 0.0005);
+ }
+ if (aCurrentControlPoint.equal(aCurrentPoint))
+ {
+ aCurrentControlPoint
+ = aCurrentPoint + ((aCurrentControlPoint - aPreviousPoint) * 0.0005);
+ }
+ rPath.cubicTo(aPreviousControlPoint.getX(), aPreviousControlPoint.getY(),
+ aCurrentControlPoint.getX(), aCurrentControlPoint.getY(),
+ aCurrentPoint.getX(), aCurrentPoint.getY());
+ if (hasOnlyOrthogonal != nullptr)
+ *hasOnlyOrthogonal = false;
+ }
+ }
+ aPreviousPoint = aCurrentPoint;
+ nPreviousIndex = nCurrentIndex;
+ }
+ if (bClosePath && nFirstIndex == 0 && nLastIndex == nPointCount)
+ {
+ rPath.close();
+ }
+}
+
+void addPolygonToPath(const basegfx::B2DPolygon& rPolygon, SkPath& rPath,
+ bool* hasOnlyOrthogonal = nullptr)
+{
+ addPolygonToPath(rPolygon, rPath, 0, rPolygon.count(), rPolygon.count(), rPolygon.isClosed(),
+ rPolygon.areControlPointsUsed(), hasOnlyOrthogonal);
+}
+
+void addPolyPolygonToPath(const basegfx::B2DPolyPolygon& rPolyPolygon, SkPath& rPath,
+ bool* hasOnlyOrthogonal = nullptr)
+{
+ const sal_uInt32 nPolygonCount(rPolyPolygon.count());
+
+ if (nPolygonCount == 0)
+ return;
+
+ sal_uInt32 nPointCount = 0;
+ for (const auto& rPolygon : rPolyPolygon)
+ nPointCount += rPolygon.count() * 3; // because cubicTo is 3 elements
+ rPath.incReserve(nPointCount);
+
+ for (const auto& rPolygon : rPolyPolygon)
+ {
+ addPolygonToPath(rPolygon, rPath, hasOnlyOrthogonal);
+ }
+}
+
+// Check if the given polygon contains a straight line. If not, it consists
+// solely of curves.
+bool polygonContainsLine(const basegfx::B2DPolyPolygon& rPolyPolygon)
+{
+ if (!rPolyPolygon.areControlPointsUsed())
+ return true; // no curves at all
+ for (const auto& rPolygon : rPolyPolygon)
+ {
+ const sal_uInt32 nPointCount(rPolygon.count());
+ bool bFirst = true;
+
+ const bool bClosePath(rPolygon.isClosed());
+
+ sal_uInt32 nCurrentIndex = 0;
+ sal_uInt32 nPreviousIndex = nPointCount - 1;
+
+ basegfx::B2DPoint aCurrentPoint;
+ basegfx::B2DPoint aPreviousPoint;
+
+ for (sal_uInt32 nIndex = 0; nIndex <= nPointCount; nIndex++)
+ {
+ if (nIndex == nPointCount && !bClosePath)
+ continue;
+
+ // Make sure we loop the last point to first point
+ nCurrentIndex = nIndex % nPointCount;
+ if (bFirst)
+ bFirst = false;
+ else
+ {
+ basegfx::B2DPoint aPreviousControlPoint
+ = rPolygon.getNextControlPoint(nPreviousIndex);
+ basegfx::B2DPoint aCurrentControlPoint
+ = rPolygon.getPrevControlPoint(nCurrentIndex);
+
+ if (aPreviousControlPoint.equal(aPreviousPoint)
+ && aCurrentControlPoint.equal(aCurrentPoint))
+ {
+ return true; // found a straight line
+ }
+ }
+ aPreviousPoint = aCurrentPoint;
+ nPreviousIndex = nCurrentIndex;
+ }
+ }
+ return false; // no straight line found
+}
+
+// returns true if the source or destination rectangles are invalid
+bool checkInvalidSourceOrDestination(SalTwoRect const& rPosAry)
+{
+ return rPosAry.mnSrcWidth <= 0 || rPosAry.mnSrcHeight <= 0 || rPosAry.mnDestWidth <= 0
+ || rPosAry.mnDestHeight <= 0;
+}
+
+std::string dumpOptionalColor(const std::optional<Color>& c)
+{
+ std::ostringstream oss;
+ if (c)
+ oss << *c;
+ else
+ oss << "no color";
+
+ return std::move(oss).str(); // optimized in C++20
+}
+
+} // end anonymous namespace
+
+// Class that triggers flushing the backing buffer when idle.
+class SkiaFlushIdle : public Idle
+{
+ SkiaSalGraphicsImpl* mpGraphics;
+#ifndef NDEBUG
+ char* debugname;
+#endif
+
+public:
+ explicit SkiaFlushIdle(SkiaSalGraphicsImpl* pGraphics)
+ : Idle(get_debug_name(pGraphics))
+ , mpGraphics(pGraphics)
+ {
+ // We don't want to be swapping before we've painted.
+ SetPriority(TaskPriority::POST_PAINT);
+ }
+#ifndef NDEBUG
+ virtual ~SkiaFlushIdle() { free(debugname); }
+#endif
+ const char* get_debug_name(SkiaSalGraphicsImpl* pGraphics)
+ {
+#ifndef NDEBUG
+ // Idle keeps just a pointer, so we need to store the string
+ debugname = strdup(
+ OString("skia idle 0x" + OString::number(reinterpret_cast<sal_uIntPtr>(pGraphics), 16))
+ .getStr());
+ return debugname;
+#else
+ (void)pGraphics;
+ return "skia idle";
+#endif
+ }
+
+ virtual void Invoke() override
+ {
+ mpGraphics->performFlush();
+ Stop();
+ // tdf#157312 Don't change priority
+ // Instances of this class are constructed with
+ // TaskPriority::POST_PAINT, but then it was set to
+ // TaskPriority::HIGHEST when reused. Flushing
+ // seems to be expensive (at least with Skia/Metal) so keep the
+ // existing priority when reused.
+ SetPriority(TaskPriority::POST_PAINT);
+ }
+};
+
+SkiaSalGraphicsImpl::SkiaSalGraphicsImpl(SalGraphics& rParent, SalGeometryProvider* pProvider)
+ : mParent(rParent)
+ , mProvider(pProvider)
+ , mIsGPU(false)
+ , moLineColor(std::nullopt)
+ , moFillColor(std::nullopt)
+ , mXorMode(XorMode::None)
+ , mFlush(new SkiaFlushIdle(this))
+ , mScaling(1)
+ , mInWindowBackingPropertiesChanged(false)
+{
+}
+
+SkiaSalGraphicsImpl::~SkiaSalGraphicsImpl()
+{
+ assert(!mSurface);
+ assert(!mWindowContext);
+}
+
+void SkiaSalGraphicsImpl::Init() {}
+
+void SkiaSalGraphicsImpl::createSurface()
+{
+ SkiaZone zone;
+ if (isOffscreen())
+ createOffscreenSurface();
+ else
+ createWindowSurface();
+ mClipRegion = vcl::Region(tools::Rectangle(0, 0, GetWidth(), GetHeight()));
+ mDirtyRect = SkIRect::MakeWH(GetWidth(), GetHeight());
+ setCanvasScalingAndClipping();
+
+ // We don't want to be swapping before we've painted.
+ mFlush->Stop();
+ mFlush->SetPriority(TaskPriority::POST_PAINT);
+}
+
+void SkiaSalGraphicsImpl::createWindowSurface(bool forceRaster)
+{
+ SkiaZone zone;
+ assert(!isOffscreen());
+ assert(!mSurface);
+ createWindowSurfaceInternal(forceRaster);
+ if (!mSurface)
+ {
+ switch (forceRaster ? RenderRaster : renderMethodToUse())
+ {
+ case RenderVulkan:
+ SAL_WARN("vcl.skia",
+ "cannot create Vulkan GPU window surface, falling back to Raster");
+ destroySurface(); // destroys also WindowContext
+ return createWindowSurface(true); // try again
+ case RenderMetal:
+ SAL_WARN("vcl.skia",
+ "cannot create Metal GPU window surface, falling back to Raster");
+ destroySurface(); // destroys also WindowContext
+ return createWindowSurface(true); // try again
+ case RenderRaster:
+ abort(); // This should not really happen, do not even try to cope with it.
+ }
+ }
+ mIsGPU = mSurface->getCanvas()->recordingContext() != nullptr;
+#ifdef DBG_UTIL
+ prefillSurface(mSurface);
+#endif
+}
+
+bool SkiaSalGraphicsImpl::isOffscreen() const
+{
+ if (mProvider == nullptr || mProvider->IsOffScreen())
+ return true;
+ // HACK: Sometimes (tdf#131939, tdf#138022, tdf#140288) VCL passes us a zero-sized window,
+ // and zero size is invalid for Skia, so force offscreen surface, where we handle this.
+ if (GetWidth() <= 0 || GetHeight() <= 0)
+ return true;
+ return false;
+}
+
+void SkiaSalGraphicsImpl::createOffscreenSurface()
+{
+ SkiaZone zone;
+ assert(isOffscreen());
+ assert(!mSurface);
+ // HACK: See isOffscreen().
+ int width = std::max(1, GetWidth());
+ int height = std::max(1, GetHeight());
+ // We need to use window scaling even for offscreen surfaces, because the common usage is rendering something
+ // into an offscreen surface and then copy it to a window, so without scaling here the result would be originally
+ // drawn without scaling and only upscaled when drawing to a window.
+ mScaling = getWindowScaling();
+ mSurface = createSkSurface(width * mScaling, height * mScaling);
+ assert(mSurface);
+ mIsGPU = mSurface->getCanvas()->recordingContext() != nullptr;
+}
+
+void SkiaSalGraphicsImpl::destroySurface()
+{
+ SkiaZone zone;
+ if (mSurface)
+ {
+ // check setClipRegion() invariant
+ assert(mSurface->getCanvas()->getSaveCount() == 3);
+ // if this fails, something forgot to use SkAutoCanvasRestore
+ assert(mSurface->getCanvas()->getTotalMatrix() == SkMatrix::Scale(mScaling, mScaling));
+ }
+ mSurface.reset();
+ mWindowContext.reset();
+ mIsGPU = false;
+ mScaling = 1;
+}
+
+void SkiaSalGraphicsImpl::performFlush()
+{
+ SkiaZone zone;
+ flushDrawing();
+ if (mSurface)
+ {
+ // Related: tdf#152703 Eliminate flickering during live resizing of a window
+ // When in live resize, the SkiaSalGraphicsImpl class does not detect that
+ // the window size has changed until after the flush has been called so
+ // call checkSurface() to recreate the SkSurface if needed before flushing.
+ checkSurface();
+ if (mDirtyRect.intersect(SkIRect::MakeWH(GetWidth(), GetHeight())))
+ flushSurfaceToWindowContext();
+ mDirtyRect.setEmpty();
+ }
+}
+
+void SkiaSalGraphicsImpl::flushSurfaceToWindowContext()
+{
+ sk_sp<SkSurface> screenSurface = mWindowContext->getBackbufferSurface();
+ if (screenSurface != mSurface)
+ {
+ // GPU-based window contexts require calling getBackbufferSurface()
+ // for every swapBuffers(), for this reason mSurface is an offscreen surface
+ // where we keep the contents (LO does not do full redraws).
+ // So here blit the surface to the window context surface and then swap it.
+
+ // Raster should always draw directly to backbuffer to save copying
+ // except for small sizes - see renderMethodToUseForSize
+ assert(isGPU() || (mSurface->width() <= 32 && mSurface->height() <= 32));
+ SkPaint paint;
+ paint.setBlendMode(SkBlendMode::kSrc); // copy as is
+ // We ignore mDirtyRect here, and mSurface already is in screenSurface coordinates,
+ // so no transformation needed.
+ screenSurface->getCanvas()->drawImage(makeCheckedImageSnapshot(mSurface), 0, 0,
+ SkSamplingOptions(), &paint);
+ screenSurface->flushAndSubmit(); // Otherwise the window is not drawn sometimes.
+ mWindowContext->swapBuffers(nullptr); // Must swap the entire surface.
+ }
+ else
+ {
+ // For raster mode use directly the backbuffer surface, it's just a bitmap
+ // surface anyway, and for those there's no real requirement to call
+ // getBackbufferSurface() repeatedly. Using our own surface would duplicate
+ // memory and cost time copying pixels around.
+ assert(!isGPU());
+ SkIRect dirtyRect = mDirtyRect;
+ if (mScaling != 1) // Adjust to mSurface coordinates if needed.
+ dirtyRect = scaleRect(dirtyRect, mScaling);
+ mWindowContext->swapBuffers(&dirtyRect);
+ }
+}
+
+void SkiaSalGraphicsImpl::DeInit() { destroySurface(); }
+
+void SkiaSalGraphicsImpl::preDraw()
+{
+ assert(comphelper::SolarMutex::get()->IsCurrentThread());
+ SkiaZone::enter(); // matched in postDraw()
+ checkSurface();
+ checkPendingDrawing();
+}
+
+void SkiaSalGraphicsImpl::postDraw()
+{
+ scheduleFlush();
+ // Skia (at least when using Vulkan) queues drawing commands and executes them only later.
+ // But tdf#136369 leads to creating and queueing many tiny bitmaps, which makes
+ // Skia slow, and may make it even run out of memory. So force a flush if such
+ // a problematic operation has been performed too many times without a flush.
+ // Note that the counter is a static variable, as all drawing shares the same Skia drawing
+ // context (and so the flush here will also flush all drawing).
+ if (pendingOperationsToFlush > 1000)
+ {
+ mSurface->flushAndSubmit();
+ pendingOperationsToFlush = 0;
+ }
+ SkiaZone::leave(); // matched in preDraw()
+ // If there's a problem with the GPU context, abort.
+ if (GrDirectContext* context = GrAsDirectContext(mSurface->getCanvas()->recordingContext()))
+ {
+ // Running out of memory on the GPU technically could be possibly recoverable,
+ // but we don't know the exact status of the surface (and what has or has not been drawn to it),
+ // so in practice this is unrecoverable without possible data loss.
+ if (context->oomed())
+ {
+ SAL_WARN("vcl.skia", "GPU context has run out of memory, aborting.");
+ abort();
+ }
+ // Unrecoverable problem.
+ if (context->abandoned())
+ {
+ SAL_WARN("vcl.skia", "GPU context has been abandoned, aborting.");
+ abort();
+ }
+ }
+}
+
+void SkiaSalGraphicsImpl::scheduleFlush()
+{
+ if (!isOffscreen())
+ {
+ if (!Application::IsInExecute())
+ performFlush(); // otherwise nothing would trigger idle rendering
+ else if (!mFlush->IsActive())
+ mFlush->Start();
+ }
+}
+
+// VCL can sometimes resize us without telling us, update the surface if needed.
+// Also create the surface on demand if it has not been created yet (it is a waste
+// to create it in Init() if it gets recreated later anyway).
+void SkiaSalGraphicsImpl::checkSurface()
+{
+ if (!mSurface)
+ {
+ createSurface();
+ SAL_INFO("vcl.skia.trace",
+ "create(" << this << "): " << Size(mSurface->width(), mSurface->height()));
+ }
+ else if (mInWindowBackingPropertiesChanged || GetWidth() * mScaling != mSurface->width()
+ || GetHeight() * mScaling != mSurface->height())
+ {
+ if (!avoidRecreateByResize())
+ {
+ Size oldSize(mSurface->width(), mSurface->height());
+ // Recreating a surface means that the old SkSurface contents will be lost.
+ // But if a window has been resized the windowing system may send repaint events
+ // only for changed parts and VCL would not repaint the whole area, assuming
+ // that some parts have not changed (this is what seems to cause tdf#131952).
+ // So carry over the old contents for windows, even though generally everything
+ // will be usually repainted anyway.
+ sk_sp<SkImage> snapshot;
+ if (!isOffscreen())
+ {
+ flushDrawing();
+ snapshot = makeCheckedImageSnapshot(mSurface);
+ }
+
+ destroySurface();
+ createSurface();
+
+ if (snapshot)
+ {
+ SkPaint paint;
+ paint.setBlendMode(SkBlendMode::kSrc); // copy as is
+ // Scaling by current mScaling is active, undo that. We assume that the scaling
+ // does not change.
+ resetCanvasScalingAndClipping();
+ mSurface->getCanvas()->drawImage(snapshot, 0, 0, SkSamplingOptions(), &paint);
+ setCanvasScalingAndClipping();
+ }
+ SAL_INFO("vcl.skia.trace", "recreate(" << this << "): old " << oldSize << " new "
+ << Size(mSurface->width(), mSurface->height())
+ << " requested "
+ << Size(GetWidth(), GetHeight()));
+ }
+ }
+}
+
+bool SkiaSalGraphicsImpl::avoidRecreateByResize() const
+{
+ // Keep the old surface if VCL sends us a broken size (see isOffscreen()).
+ if (GetWidth() == 0 || GetHeight() == 0)
+ return true;
+ return false;
+}
+
+void SkiaSalGraphicsImpl::flushDrawing()
+{
+ if (!mSurface)
+ return;
+ checkPendingDrawing();
+ ++pendingOperationsToFlush;
+}
+
+void SkiaSalGraphicsImpl::setCanvasScalingAndClipping()
+{
+ SkCanvas* canvas = mSurface->getCanvas();
+ assert(canvas->getSaveCount() == 1);
+ // If HiDPI scaling is active, simply set a scaling matrix for the canvas. This means
+ // that all painting can use VCL coordinates and they'll be automatically translated to mSurface
+ // scaled coordinates. If that is not wanted, the scale() state needs to be temporarily unset.
+ // State such as mDirtyRect is not scaled, the scaling matrix applies to clipping too,
+ // and the rest needs to be handled explicitly.
+ // When reading mSurface contents there's no automatic scaling and it needs to be handled explicitly.
+ canvas->save(); // keep the original state without any scaling
+ canvas->scale(mScaling, mScaling);
+
+ // SkCanvas::clipRegion() can only further reduce the clip region,
+ // but we need to set the given region, which may extend it.
+ // So handle that by always having the full clip region saved on the stack
+ // and always go back to that. SkCanvas::restore() only affects the clip
+ // and the matrix.
+ canvas->save(); // keep scaled state without clipping
+ setCanvasClipRegion(canvas, mClipRegion);
+}
+
+void SkiaSalGraphicsImpl::resetCanvasScalingAndClipping()
+{
+ SkCanvas* canvas = mSurface->getCanvas();
+ assert(canvas->getSaveCount() == 3);
+ canvas->restore(); // undo clipping
+ canvas->restore(); // undo scaling
+}
+
+void SkiaSalGraphicsImpl::setClipRegion(const vcl::Region& region)
+{
+ if (mClipRegion == region)
+ return;
+ SkiaZone zone;
+ checkPendingDrawing();
+ checkSurface();
+ mClipRegion = region;
+ SAL_INFO("vcl.skia.trace", "setclipregion(" << this << "): " << region);
+ SkCanvas* canvas = mSurface->getCanvas();
+ assert(canvas->getSaveCount() == 3);
+ canvas->restore(); // undo previous clip state, see setCanvasScalingAndClipping()
+ canvas->save();
+ setCanvasClipRegion(canvas, region);
+}
+
+void SkiaSalGraphicsImpl::setCanvasClipRegion(SkCanvas* canvas, const vcl::Region& region)
+{
+ SkiaZone zone;
+ SkPath path;
+ // Always use region rectangles, regardless of what the region uses internally.
+ // That's what other VCL backends do, and trying to use addPolyPolygonToPath()
+ // in case a polygon is used leads to off-by-one errors such as tdf#133208.
+ RectangleVector rectangles;
+ region.GetRegionRectangles(rectangles);
+ path.incReserve(rectangles.size() + 1);
+ for (const tools::Rectangle& rectangle : rectangles)
+ path.addRect(SkRect::MakeXYWH(rectangle.getX(), rectangle.getY(), rectangle.GetWidth(),
+ rectangle.GetHeight()));
+ path.setFillType(SkPathFillType::kEvenOdd);
+ canvas->clipPath(path);
+}
+
+void SkiaSalGraphicsImpl::ResetClipRegion()
+{
+ setClipRegion(vcl::Region(tools::Rectangle(0, 0, GetWidth(), GetHeight())));
+}
+
+const vcl::Region& SkiaSalGraphicsImpl::getClipRegion() const { return mClipRegion; }
+
+sal_uInt16 SkiaSalGraphicsImpl::GetBitCount() const { return 32; }
+
+tools::Long SkiaSalGraphicsImpl::GetGraphicsWidth() const { return GetWidth(); }
+
+void SkiaSalGraphicsImpl::SetLineColor()
+{
+ checkPendingDrawing();
+ moLineColor = std::nullopt;
+}
+
+void SkiaSalGraphicsImpl::SetLineColor(Color nColor)
+{
+ checkPendingDrawing();
+ moLineColor = nColor;
+}
+
+void SkiaSalGraphicsImpl::SetFillColor()
+{
+ checkPendingDrawing();
+ moFillColor = std::nullopt;
+}
+
+void SkiaSalGraphicsImpl::SetFillColor(Color nColor)
+{
+ checkPendingDrawing();
+ moFillColor = nColor;
+}
+
+void SkiaSalGraphicsImpl::SetXORMode(bool set, bool invert)
+{
+ XorMode newMode = set ? (invert ? XorMode::Invert : XorMode::Xor) : XorMode::None;
+ if (newMode == mXorMode)
+ return;
+ checkPendingDrawing();
+ SAL_INFO("vcl.skia.trace", "setxormode(" << this << "): " << set << "/" << invert);
+ mXorMode = newMode;
+}
+
+void SkiaSalGraphicsImpl::SetROPLineColor(SalROPColor nROPColor)
+{
+ checkPendingDrawing();
+ switch (nROPColor)
+ {
+ case SalROPColor::N0:
+ moLineColor = Color(0, 0, 0);
+ break;
+ case SalROPColor::N1:
+ moLineColor = Color(0xff, 0xff, 0xff);
+ break;
+ case SalROPColor::Invert:
+ moLineColor = Color(0xff, 0xff, 0xff);
+ break;
+ }
+}
+
+void SkiaSalGraphicsImpl::SetROPFillColor(SalROPColor nROPColor)
+{
+ checkPendingDrawing();
+ switch (nROPColor)
+ {
+ case SalROPColor::N0:
+ moFillColor = Color(0, 0, 0);
+ break;
+ case SalROPColor::N1:
+ moFillColor = Color(0xff, 0xff, 0xff);
+ break;
+ case SalROPColor::Invert:
+ moFillColor = Color(0xff, 0xff, 0xff);
+ break;
+ }
+}
+
+void SkiaSalGraphicsImpl::drawPixel(tools::Long nX, tools::Long nY)
+{
+ drawPixel(nX, nY, *moLineColor);
+}
+
+void SkiaSalGraphicsImpl::drawPixel(tools::Long nX, tools::Long nY, Color nColor)
+{
+ preDraw();
+ SAL_INFO("vcl.skia.trace", "drawpixel(" << this << "): " << Point(nX, nY) << ":" << nColor);
+ addUpdateRegion(SkRect::MakeXYWH(nX, nY, 1, 1));
+ SkPaint paint = makePixelPaint(nColor);
+ // Apparently drawPixel() is actually expected to set the pixel and not draw it.
+ paint.setBlendMode(SkBlendMode::kSrc); // set as is, including alpha
+ if (mScaling != 1 && isUnitTestRunning())
+ {
+ // On HiDPI displays, draw a square on the entire non-hidpi "pixel" when running unittests,
+ // since tests often require precise pixel drawing.
+ paint.setStrokeWidth(1); // this will be scaled by mScaling
+ paint.setStrokeCap(SkPaint::kSquare_Cap);
+ }
+ getDrawCanvas()->drawPoint(toSkX(nX), toSkY(nY), paint);
+ postDraw();
+}
+
+void SkiaSalGraphicsImpl::drawLine(tools::Long nX1, tools::Long nY1, tools::Long nX2,
+ tools::Long nY2)
+{
+ if (!moLineColor)
+ return;
+ preDraw();
+ SAL_INFO("vcl.skia.trace", "drawline(" << this << "): " << Point(nX1, nY1) << "->"
+ << Point(nX2, nY2) << ":" << *moLineColor);
+ addUpdateRegion(SkRect::MakeLTRB(nX1, nY1, nX2, nY2).makeSorted());
+ SkPaint paint = makeLinePaint();
+ paint.setAntiAlias(mParent.getAntiAlias());
+ if (mScaling != 1 && isUnitTestRunning())
+ {
+ // On HiDPI displays, do not draw hairlines, draw 1-pixel wide lines in order to avoid
+ // smoothing that would confuse unittests.
+ paint.setStrokeWidth(1); // this will be scaled by mScaling
+ paint.setStrokeCap(SkPaint::kSquare_Cap);
+ }
+ getDrawCanvas()->drawLine(toSkX(nX1), toSkY(nY1), toSkX(nX2), toSkY(nY2), paint);
+ postDraw();
+}
+
+void SkiaSalGraphicsImpl::privateDrawAlphaRect(tools::Long nX, tools::Long nY, tools::Long nWidth,
+ tools::Long nHeight, double fTransparency,
+ bool blockAA)
+{
+ preDraw();
+ SAL_INFO("vcl.skia.trace", "privatedrawrect("
+ << this << "): " << SkIRect::MakeXYWH(nX, nY, nWidth, nHeight)
+ << ":" << dumpOptionalColor(moLineColor) << ":"
+ << dumpOptionalColor(moFillColor) << ":" << fTransparency);
+ addUpdateRegion(SkRect::MakeXYWH(nX, nY, nWidth, nHeight));
+ SkCanvas* canvas = getDrawCanvas();
+ if (moFillColor)
+ {
+ SkPaint paint = makeFillPaint(fTransparency);
+ paint.setAntiAlias(!blockAA && mParent.getAntiAlias());
+ // HACK: If the polygon is just a line, it still should be drawn. But when filling
+ // Skia doesn't draw empty polygons, so in that case ensure the line is drawn.
+ if (!moLineColor && SkSize::Make(nWidth, nHeight).isEmpty())
+ paint.setStyle(SkPaint::kStroke_Style);
+ canvas->drawIRect(SkIRect::MakeXYWH(nX, nY, nWidth, nHeight), paint);
+ }
+ if (moLineColor && moLineColor != moFillColor) // otherwise handled by fill
+ {
+ SkPaint paint = makeLinePaint(fTransparency);
+ paint.setAntiAlias(!blockAA && mParent.getAntiAlias());
+ if (mScaling != 1 && isUnitTestRunning())
+ {
+ // On HiDPI displays, do not draw just a hairline but instead a full-width "pixel" when running unittests,
+ // since tests often require precise pixel drawing.
+ paint.setStrokeWidth(1); // this will be scaled by mScaling
+ paint.setStrokeCap(SkPaint::kSquare_Cap);
+ }
+ // The obnoxious "-1 DrawRect()" hack that I don't understand the purpose of (and I'm not sure
+ // if anybody does), but without it some cases do not work. The max() is needed because Skia
+ // will not draw anything if width or height is 0.
+ canvas->drawRect(SkRect::MakeXYWH(toSkX(nX), toSkY(nY),
+ std::max(tools::Long(1), nWidth - 1),
+ std::max(tools::Long(1), nHeight - 1)),
+ paint);
+ }
+ postDraw();
+}
+
+void SkiaSalGraphicsImpl::drawRect(tools::Long nX, tools::Long nY, tools::Long nWidth,
+ tools::Long nHeight)
+{
+ privateDrawAlphaRect(nX, nY, nWidth, nHeight, 0.0, true);
+}
+
+void SkiaSalGraphicsImpl::drawPolyLine(sal_uInt32 nPoints, const Point* pPtAry)
+{
+ basegfx::B2DPolygon aPolygon;
+ aPolygon.append(basegfx::B2DPoint(pPtAry->getX(), pPtAry->getY()), nPoints);
+ for (sal_uInt32 i = 1; i < nPoints; ++i)
+ aPolygon.setB2DPoint(i, basegfx::B2DPoint(pPtAry[i].getX(), pPtAry[i].getY()));
+ aPolygon.setClosed(false);
+
+ drawPolyLine(basegfx::B2DHomMatrix(), aPolygon, 0.0, 1.0, nullptr, basegfx::B2DLineJoin::Miter,
+ css::drawing::LineCap_BUTT, basegfx::deg2rad(15.0) /*default*/, false);
+}
+
+void SkiaSalGraphicsImpl::drawPolygon(sal_uInt32 nPoints, const Point* pPtAry)
+{
+ basegfx::B2DPolygon aPolygon;
+ aPolygon.append(basegfx::B2DPoint(pPtAry->getX(), pPtAry->getY()), nPoints);
+ for (sal_uInt32 i = 1; i < nPoints; ++i)
+ aPolygon.setB2DPoint(i, basegfx::B2DPoint(pPtAry[i].getX(), pPtAry[i].getY()));
+
+ drawPolyPolygon(basegfx::B2DHomMatrix(), basegfx::B2DPolyPolygon(aPolygon), 0.0);
+}
+
+void SkiaSalGraphicsImpl::drawPolyPolygon(sal_uInt32 nPoly, const sal_uInt32* pPoints,
+ const Point** pPtAry)
+{
+ basegfx::B2DPolyPolygon aPolyPolygon;
+ for (sal_uInt32 nPolygon = 0; nPolygon < nPoly; ++nPolygon)
+ {
+ sal_uInt32 nPoints = pPoints[nPolygon];
+ if (nPoints)
+ {
+ const Point* pSubPoints = pPtAry[nPolygon];
+ basegfx::B2DPolygon aPolygon;
+ aPolygon.append(basegfx::B2DPoint(pSubPoints->getX(), pSubPoints->getY()), nPoints);
+ for (sal_uInt32 i = 1; i < nPoints; ++i)
+ aPolygon.setB2DPoint(i,
+ basegfx::B2DPoint(pSubPoints[i].getX(), pSubPoints[i].getY()));
+
+ aPolyPolygon.append(aPolygon);
+ }
+ }
+
+ drawPolyPolygon(basegfx::B2DHomMatrix(), aPolyPolygon, 0.0);
+}
+
+void SkiaSalGraphicsImpl::drawPolyPolygon(const basegfx::B2DHomMatrix& rObjectToDevice,
+ const basegfx::B2DPolyPolygon& rPolyPolygon,
+ double fTransparency)
+{
+ const bool bHasFill(moFillColor.has_value());
+ const bool bHasLine(moLineColor.has_value());
+
+ if (rPolyPolygon.count() == 0 || !(bHasFill || bHasLine) || fTransparency < 0.0
+ || fTransparency >= 1.0)
+ return;
+
+ basegfx::B2DPolyPolygon aPolyPolygon(rPolyPolygon);
+ aPolyPolygon.transform(rObjectToDevice);
+
+ SAL_INFO("vcl.skia.trace", "drawpolypolygon(" << this << "): " << aPolyPolygon << ":"
+ << dumpOptionalColor(moLineColor) << ":"
+ << dumpOptionalColor(moFillColor));
+
+ if (delayDrawPolyPolygon(aPolyPolygon, fTransparency))
+ {
+ scheduleFlush();
+ return;
+ }
+
+ performDrawPolyPolygon(aPolyPolygon, fTransparency, mParent.getAntiAlias());
+}
+
+void SkiaSalGraphicsImpl::performDrawPolyPolygon(const basegfx::B2DPolyPolygon& aPolyPolygon,
+ double fTransparency, bool useAA)
+{
+ preDraw();
+
+ SkPath polygonPath;
+ bool hasOnlyOrthogonal = true;
+ addPolyPolygonToPath(aPolyPolygon, polygonPath, &hasOnlyOrthogonal);
+ polygonPath.setFillType(SkPathFillType::kEvenOdd);
+ addUpdateRegion(polygonPath.getBounds());
+
+ // For lines we use toSkX()/toSkY() in order to pass centers of pixels to Skia,
+ // as that leads to better results with floating-point coordinates
+ // (e.g. https://bugs.chromium.org/p/skia/issues/detail?id=9611).
+ // But that means that we generally need to use it also for areas, so that they
+ // line up properly if used together (tdf#134346).
+ // On the other hand, with AA enabled and rectangular areas, this leads to fuzzy
+ // edges (tdf#137329). But since rectangular areas line up perfectly to pixels
+ // everywhere, it shouldn't be necessary to do this for them.
+ // So if AA is enabled, avoid this fixup for rectangular areas.
+ if (!useAA || !hasOnlyOrthogonal)
+ {
+ // We normally use pixel at their center positions, but slightly off (see toSkX/Y()).
+ // With AA lines that "slightly off" causes tiny changes of color, making some tests
+ // fail. Since moving AA-ed line slightly to a side doesn't cause any real visual
+ // difference, just place exactly at the center. tdf#134346
+ const SkScalar posFix = useAA ? toSkXYFix : 0;
+ polygonPath.offset(toSkX(0) + posFix, toSkY(0) + posFix, nullptr);
+ }
+ if (moFillColor)
+ {
+ SkPaint aPaint = makeFillPaint(fTransparency);
+ aPaint.setAntiAlias(useAA);
+ // HACK: If the polygon is just a line, it still should be drawn. But when filling
+ // Skia doesn't draw empty polygons, so in that case ensure the line is drawn.
+ if (!moLineColor && polygonPath.getBounds().isEmpty())
+ aPaint.setStyle(SkPaint::kStroke_Style);
+ getDrawCanvas()->drawPath(polygonPath, aPaint);
+ }
+ if (moLineColor && moLineColor != moFillColor) // otherwise handled by fill
+ {
+ SkPaint aPaint = makeLinePaint(fTransparency);
+ aPaint.setAntiAlias(useAA);
+ getDrawCanvas()->drawPath(polygonPath, aPaint);
+ }
+ postDraw();
+}
+
+namespace
+{
+struct LessThan
+{
+ bool operator()(const basegfx::B2DPoint& point1, const basegfx::B2DPoint& point2) const
+ {
+ if (basegfx::fTools::equal(point1.getX(), point2.getX()))
+ return basegfx::fTools::less(point1.getY(), point2.getY());
+ return basegfx::fTools::less(point1.getX(), point2.getX());
+ }
+};
+} // namespace
+
+bool SkiaSalGraphicsImpl::delayDrawPolyPolygon(const basegfx::B2DPolyPolygon& aPolyPolygon,
+ double fTransparency)
+{
+ // There is some code that needlessly subdivides areas into adjacent rectangles,
+ // but Skia doesn't line them up perfectly if AA is enabled (e.g. Cairo, Qt5 do,
+ // but Skia devs claim it's working as intended
+ // https://groups.google.com/d/msg/skia-discuss/NlKpD2X_5uc/Vuwd-kyYBwAJ).
+ // An example is tdf#133016, which triggers SvgStyleAttributes::add_stroke()
+ // implementing a line stroke as a bunch of polygons instead of just one, and
+ // SvgLinearAtomPrimitive2D::create2DDecomposition() creates a gradient
+ // as a series of polygons of gradually changing color. Those places should be
+ // changed, but try to merge those split polygons back into the original one,
+ // where the needlessly created edges causing problems will not exist.
+ // This means drawing of such polygons needs to be delayed, so that they can
+ // be possibly merged with the next one.
+ // Merge only polygons of the same properties (color, etc.), so the gradient problem
+ // actually isn't handled here.
+
+ // Only AA polygons need merging, because they do not line up well because of the AA of the edges.
+ if (!mParent.getAntiAlias())
+ return false;
+ // Only filled polygons without an outline are problematic.
+ if (!moFillColor || moLineColor)
+ return false;
+ // Merge only simple polygons, real polypolygons most likely aren't needlessly split,
+ // so they do not need joining.
+ if (aPolyPolygon.count() != 1)
+ return false;
+ // If the polygon is not closed, it doesn't mark an area to be filled.
+ if (!aPolyPolygon.isClosed())
+ return false;
+ // If a polygon does not contain a straight line, i.e. it's all curves, then do not merge.
+ // First of all that's even more expensive, and second it's very unlikely that it's a polygon
+ // split into more polygons.
+ if (!polygonContainsLine(aPolyPolygon))
+ return false;
+
+ if (mLastPolyPolygonInfo.polygons.size() != 0
+ && (mLastPolyPolygonInfo.transparency != fTransparency
+ || !mLastPolyPolygonInfo.bounds.overlaps(aPolyPolygon.getB2DRange())))
+ {
+ checkPendingDrawing(); // Cannot be parts of the same larger polygon, draw the last and reset.
+ }
+ if (!mLastPolyPolygonInfo.polygons.empty())
+ {
+ assert(aPolyPolygon.count() == 1);
+ assert(mLastPolyPolygonInfo.polygons.back().count() == 1);
+ // Check if the new and the previous polygon share at least one point. If not, then they
+ // cannot be adjacent polygons, so there's no point in trying to merge them.
+ bool sharePoint = false;
+ const basegfx::B2DPolygon& poly1 = aPolyPolygon.getB2DPolygon(0);
+ const basegfx::B2DPolygon& poly2 = mLastPolyPolygonInfo.polygons.back().getB2DPolygon(0);
+ o3tl::sorted_vector<basegfx::B2DPoint, LessThan> poly1Points; // for O(n log n)
+ poly1Points.reserve(poly1.count());
+ for (sal_uInt32 i = 0; i < poly1.count(); ++i)
+ poly1Points.insert(poly1.getB2DPoint(i));
+ for (sal_uInt32 i = 0; i < poly2.count(); ++i)
+ if (poly1Points.find(poly2.getB2DPoint(i)) != poly1Points.end())
+ {
+ sharePoint = true;
+ break;
+ }
+ if (!sharePoint)
+ checkPendingDrawing(); // Draw the previous one and reset.
+ }
+ // Collect the polygons that can be possibly merged. Do the merging only once at the end,
+ // because it's not a cheap operation.
+ mLastPolyPolygonInfo.polygons.push_back(aPolyPolygon);
+ mLastPolyPolygonInfo.bounds.expand(aPolyPolygon.getB2DRange());
+ mLastPolyPolygonInfo.transparency = fTransparency;
+ return true;
+}
+
+// Tdf#140848 - basegfx::utils::mergeToSinglePolyPolygon() seems to have rounding
+// errors that sometimes cause it to merge incorrectly.
+static void roundPolygonPoints(basegfx::B2DPolyPolygon& polyPolygon)
+{
+ for (basegfx::B2DPolygon& polygon : polyPolygon)
+ {
+ polygon.makeUnique();
+ for (sal_uInt32 i = 0; i < polygon.count(); ++i)
+ polygon.setB2DPoint(i, basegfx::B2DPoint(basegfx::fround(polygon.getB2DPoint(i))));
+ // Control points are saved as vectors relative to points, so hopefully
+ // there's no need to round those.
+ }
+}
+
+void SkiaSalGraphicsImpl::checkPendingDrawing()
+{
+ if (mLastPolyPolygonInfo.polygons.size() != 0)
+ { // Flush any pending polygon drawing.
+ basegfx::B2DPolyPolygonVector polygons;
+ std::swap(polygons, mLastPolyPolygonInfo.polygons);
+ double transparency = mLastPolyPolygonInfo.transparency;
+ mLastPolyPolygonInfo.bounds.reset();
+ if (polygons.size() == 1)
+ performDrawPolyPolygon(polygons.front(), transparency, true);
+ else
+ {
+ for (basegfx::B2DPolyPolygon& p : polygons)
+ roundPolygonPoints(p);
+ performDrawPolyPolygon(basegfx::utils::mergeToSinglePolyPolygon(polygons), transparency,
+ true);
+ }
+ }
+}
+
+bool SkiaSalGraphicsImpl::drawPolyLine(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)
+{
+ if (!rPolyLine.count() || fTransparency < 0.0 || fTransparency > 1.0 || !moLineColor)
+ {
+ return true;
+ }
+
+ preDraw();
+ SAL_INFO("vcl.skia.trace",
+ "drawpolyline(" << this << "): " << rPolyLine << ":" << *moLineColor);
+
+ // Adjust line width for object-to-device scale.
+ fLineWidth = (rObjectToDevice * basegfx::B2DVector(fLineWidth, 0)).getLength();
+ // On HiDPI displays, do not draw hairlines, draw 1-pixel wide lines in order to avoid
+ // smoothing that would confuse unittests.
+ if (fLineWidth == 0 && mScaling != 1 && isUnitTestRunning())
+ fLineWidth = 1; // this will be scaled by mScaling
+
+ // Transform to DeviceCoordinates, get DeviceLineWidth, execute PixelSnapHairline
+ basegfx::B2DPolygon aPolyLine(rPolyLine);
+ aPolyLine.transform(rObjectToDevice);
+ if (bPixelSnapHairline)
+ {
+ aPolyLine = basegfx::utils::snapPointsOfHorizontalOrVerticalEdges(aPolyLine);
+ }
+
+ SkPaint aPaint = makeLinePaint(fTransparency);
+
+ switch (eLineJoin)
+ {
+ case basegfx::B2DLineJoin::Bevel:
+ aPaint.setStrokeJoin(SkPaint::kBevel_Join);
+ break;
+ case basegfx::B2DLineJoin::Round:
+ aPaint.setStrokeJoin(SkPaint::kRound_Join);
+ break;
+ case basegfx::B2DLineJoin::NONE:
+ break;
+ case basegfx::B2DLineJoin::Miter:
+ aPaint.setStrokeJoin(SkPaint::kMiter_Join);
+ // convert miter minimum angle to miter limit
+ aPaint.setStrokeMiter(1.0 / std::sin(fMiterMinimumAngle / 2.0));
+ break;
+ }
+
+ switch (eLineCap)
+ {
+ case css::drawing::LineCap_ROUND:
+ aPaint.setStrokeCap(SkPaint::kRound_Cap);
+ break;
+ case css::drawing::LineCap_SQUARE:
+ aPaint.setStrokeCap(SkPaint::kSquare_Cap);
+ break;
+ default: // css::drawing::LineCap_BUTT:
+ aPaint.setStrokeCap(SkPaint::kButt_Cap);
+ break;
+ }
+
+ aPaint.setStrokeWidth(fLineWidth);
+ aPaint.setAntiAlias(mParent.getAntiAlias());
+ // See the tdf#134346 comment above.
+ const SkScalar posFix = mParent.getAntiAlias() ? toSkXYFix : 0;
+
+ if (pStroke && std::accumulate(pStroke->begin(), pStroke->end(), 0.0) != 0)
+ {
+ std::vector<SkScalar> intervals;
+ // Transform size by the matrix.
+ for (double stroke : *pStroke)
+ intervals.push_back((rObjectToDevice * basegfx::B2DVector(stroke, 0)).getLength());
+ aPaint.setPathEffect(SkDashPathEffect::Make(intervals.data(), intervals.size(), 0));
+ }
+
+ // Skia does not support basegfx::B2DLineJoin::NONE, so in that case batch only if lines
+ // are not wider than a pixel.
+ if (eLineJoin != basegfx::B2DLineJoin::NONE || fLineWidth <= 1.0)
+ {
+ SkPath aPath;
+ aPath.incReserve(aPolyLine.count() * 3); // because cubicTo is 3 elements
+ addPolygonToPath(aPolyLine, aPath);
+ aPath.offset(toSkX(0) + posFix, toSkY(0) + posFix, nullptr);
+ addUpdateRegion(aPath.getBounds());
+ getDrawCanvas()->drawPath(aPath, aPaint);
+ }
+ else
+ {
+ sal_uInt32 nPoints = aPolyLine.count();
+ bool bClosed = aPolyLine.isClosed();
+ bool bHasCurves = aPolyLine.areControlPointsUsed();
+ for (sal_uInt32 j = 0; j < nPoints; ++j)
+ {
+ SkPath aPath;
+ aPath.incReserve(2 * 3); // because cubicTo is 3 elements
+ addPolygonToPath(aPolyLine, aPath, j, j + 1, nPoints, bClosed, bHasCurves);
+ aPath.offset(toSkX(0) + posFix, toSkY(0) + posFix, nullptr);
+ addUpdateRegion(aPath.getBounds());
+ getDrawCanvas()->drawPath(aPath, aPaint);
+ }
+ }
+
+ postDraw();
+
+ return true;
+}
+
+bool SkiaSalGraphicsImpl::drawPolyLineBezier(sal_uInt32, const Point*, const PolyFlags*)
+{
+ return false;
+}
+
+bool SkiaSalGraphicsImpl::drawPolygonBezier(sal_uInt32, const Point*, const PolyFlags*)
+{
+ return false;
+}
+
+bool SkiaSalGraphicsImpl::drawPolyPolygonBezier(sal_uInt32, const sal_uInt32*, const Point* const*,
+ const PolyFlags* const*)
+{
+ return false;
+}
+
+void SkiaSalGraphicsImpl::copyArea(tools::Long nDestX, tools::Long nDestY, tools::Long nSrcX,
+ tools::Long nSrcY, tools::Long nSrcWidth, tools::Long nSrcHeight,
+ bool /*bWindowInvalidate*/)
+{
+ if (nDestX == nSrcX && nDestY == nSrcY)
+ return;
+ preDraw();
+ SAL_INFO("vcl.skia.trace", "copyarea("
+ << this << "): " << Point(nSrcX, nSrcY) << "->"
+ << SkIRect::MakeXYWH(nDestX, nDestY, nSrcWidth, nSrcHeight));
+ // Using SkSurface::draw() should be more efficient, but it's too buggy.
+ SalTwoRect rPosAry(nSrcX, nSrcY, nSrcWidth, nSrcHeight, nDestX, nDestY, nSrcWidth, nSrcHeight);
+ privateCopyBits(rPosAry, this);
+ postDraw();
+}
+
+void SkiaSalGraphicsImpl::copyBits(const SalTwoRect& rPosAry, SalGraphics* pSrcGraphics)
+{
+ preDraw();
+ SkiaSalGraphicsImpl* src;
+ if (pSrcGraphics)
+ {
+ assert(dynamic_cast<SkiaSalGraphicsImpl*>(pSrcGraphics->GetImpl()));
+ src = static_cast<SkiaSalGraphicsImpl*>(pSrcGraphics->GetImpl());
+ src->checkSurface();
+ src->flushDrawing();
+ }
+ else
+ {
+ src = this;
+ assert(mXorMode == XorMode::None);
+ }
+ auto srcDebug = [&]() -> std::string {
+ if (src == this)
+ return "(self)";
+ else
+ {
+ std::ostringstream stream;
+ stream << "(" << src << ")";
+ return stream.str();
+ }
+ };
+ SAL_INFO("vcl.skia.trace", "copybits(" << this << "): " << srcDebug() << ": " << rPosAry);
+ privateCopyBits(rPosAry, src);
+ postDraw();
+}
+
+void SkiaSalGraphicsImpl::privateCopyBits(const SalTwoRect& rPosAry, SkiaSalGraphicsImpl* src)
+{
+ assert(mXorMode == XorMode::None);
+ addUpdateRegion(SkRect::MakeXYWH(rPosAry.mnDestX, rPosAry.mnDestY, rPosAry.mnDestWidth,
+ rPosAry.mnDestHeight));
+ SkPaint paint;
+ paint.setBlendMode(SkBlendMode::kSrc); // copy as is, including alpha
+ SkIRect srcRect = SkIRect::MakeXYWH(rPosAry.mnSrcX, rPosAry.mnSrcY, rPosAry.mnSrcWidth,
+ rPosAry.mnSrcHeight);
+ SkRect destRect = SkRect::MakeXYWH(rPosAry.mnDestX, rPosAry.mnDestY, rPosAry.mnDestWidth,
+ rPosAry.mnDestHeight);
+
+ if (!SkIRect::Intersects(srcRect, SkIRect::MakeWH(src->GetWidth(), src->GetHeight()))
+ || !SkRect::Intersects(destRect, SkRect::MakeWH(GetWidth(), GetHeight())))
+ return;
+
+ if (src == this)
+ {
+ // Copy-to-self means that we'd take a snapshot, which would refcount the data,
+ // and then drawing would result in copy in write, copying the entire surface.
+ // Try to copy less by making a snapshot of only what is needed.
+ // A complication here is that drawImageRect() can handle coordinates outside
+ // of surface fine, but makeImageSnapshot() will crop to the surface area,
+ // so do that manually here in order to adjust also destination rectangle.
+ if (srcRect.x() < 0 || srcRect.y() < 0)
+ {
+ destRect.fLeft += -srcRect.x();
+ destRect.fTop += -srcRect.y();
+ srcRect.adjust(-srcRect.x(), -srcRect.y(), 0, 0);
+ }
+ // Note that right() and bottom() are not inclusive (are outside of the rect).
+ if (srcRect.right() - 1 > GetWidth() || srcRect.bottom() - 1 > GetHeight())
+ {
+ destRect.fRight += GetWidth() - srcRect.right();
+ destRect.fBottom += GetHeight() - srcRect.bottom();
+ srcRect.adjust(0, 0, GetWidth() - srcRect.right(), GetHeight() - srcRect.bottom());
+ }
+ // Scaling for source coordinates must be done manually.
+ if (src->mScaling != 1)
+ srcRect = scaleRect(srcRect, src->mScaling);
+ sk_sp<SkImage> image = makeCheckedImageSnapshot(src->mSurface, srcRect);
+ srcRect.offset(-srcRect.x(), -srcRect.y());
+ getDrawCanvas()->drawImageRect(image, SkRect::Make(srcRect), destRect,
+ makeSamplingOptions(rPosAry, mScaling, src->mScaling),
+ &paint, SkCanvas::kFast_SrcRectConstraint);
+ }
+ else
+ {
+ // Scaling for source coordinates must be done manually.
+ if (src->mScaling != 1)
+ srcRect = scaleRect(srcRect, src->mScaling);
+ // Do not use makeImageSnapshot(rect), as that one may make a needless data copy.
+ getDrawCanvas()->drawImageRect(makeCheckedImageSnapshot(src->mSurface),
+ SkRect::Make(srcRect), destRect,
+ makeSamplingOptions(rPosAry, mScaling, src->mScaling),
+ &paint, SkCanvas::kFast_SrcRectConstraint);
+ }
+}
+
+bool SkiaSalGraphicsImpl::blendBitmap(const SalTwoRect& rPosAry, const SalBitmap& rBitmap)
+{
+ if (checkInvalidSourceOrDestination(rPosAry))
+ return false;
+
+ assert(dynamic_cast<const SkiaSalBitmap*>(&rBitmap));
+ const SkiaSalBitmap& rSkiaBitmap = static_cast<const SkiaSalBitmap&>(rBitmap);
+ // This is used by VirtualDevice in the alpha mode for the "alpha" layer
+ // So the result is transparent only if both the inputs
+ // are transparent. Which seems to be what SkBlendMode::kModulate does,
+ // so use that.
+ // See also blendAlphaBitmap().
+ if (rSkiaBitmap.IsFullyOpaqueAsAlpha())
+ {
+ // Optimization. If the bitmap means fully opaque, it's all one's. In CPU
+ // mode it should be faster to just copy instead of SkBlendMode::kMultiply.
+ drawBitmap(rPosAry, rSkiaBitmap);
+ }
+ else
+ drawBitmap(rPosAry, rSkiaBitmap, SkBlendMode::kModulate);
+ return true;
+}
+
+bool SkiaSalGraphicsImpl::blendAlphaBitmap(const SalTwoRect& rPosAry,
+ const SalBitmap& rSourceBitmap,
+ const SalBitmap& rMaskBitmap,
+ const SalBitmap& rAlphaBitmap)
+{
+ // tdf#156361 use slow blending path if alpha mask blending is disabled
+ // SkiaSalGraphicsImpl::blendBitmap() fails unexpectedly in the following
+ // cases so return false and use the non-Skia alpha mask blending code:
+ // - Unexpected white areas when running a slideshow or printing:
+ // https://bugs.documentfoundation.org/attachment.cgi?id=188447
+ // - Unexpected scaling of bitmap and/or alpha mask when exporting to PDF:
+ // https://bugs.documentfoundation.org/attachment.cgi?id=188498
+ if (!SkiaHelper::isAlphaMaskBlendingEnabled())
+ return false;
+
+ if (checkInvalidSourceOrDestination(rPosAry))
+ return false;
+
+ assert(dynamic_cast<const SkiaSalBitmap*>(&rSourceBitmap));
+ assert(dynamic_cast<const SkiaSalBitmap*>(&rMaskBitmap));
+ assert(dynamic_cast<const SkiaSalBitmap*>(&rAlphaBitmap));
+ const SkiaSalBitmap& rSkiaSourceBitmap = static_cast<const SkiaSalBitmap&>(rSourceBitmap);
+ const SkiaSalBitmap& rSkiaMaskBitmap = static_cast<const SkiaSalBitmap&>(rMaskBitmap);
+ const SkiaSalBitmap& rSkiaAlphaBitmap = static_cast<const SkiaSalBitmap&>(rAlphaBitmap);
+
+ if (rSkiaMaskBitmap.IsFullyOpaqueAsAlpha())
+ {
+ // Optimization. If the mask of the bitmap to be blended means it's actually opaque,
+ // just draw the bitmap directly (that's what the math below will result in).
+ drawBitmap(rPosAry, rSkiaSourceBitmap);
+ return true;
+ }
+ // This was originally implemented for the OpenGL drawing method and it is poorly documented.
+ // The source and mask bitmaps are the usual data and alpha bitmaps, and 'alpha'
+ // is the "alpha" layer of the VirtualDevice (the alpha in VirtualDevice is also stored
+ // as a separate bitmap). Now if I understand it correctly these two alpha masks first need
+ // to be combined into the actual alpha mask to be used. The formula for TYPE_BLEND
+ // in opengl's combinedTextureFragmentShader.glsl is
+ // "result_alpha = 1.0 - (1.0 - floor(alpha)) * mask".
+ // See also blendBitmap().
+
+ SkSamplingOptions samplingOptions = makeSamplingOptions(rPosAry, mScaling);
+ // First do the "( 1 - alpha ) * mask"
+ // (no idea how to do "floor", but hopefully not needed in practice).
+ sk_sp<SkShader> shaderAlpha
+ = SkShaders::Blend(SkBlendMode::kDstIn, rSkiaMaskBitmap.GetAlphaSkShader(samplingOptions),
+ rSkiaAlphaBitmap.GetAlphaSkShader(samplingOptions));
+ // And now draw the bitmap with "1 - x", where x is the "( 1 - alpha ) * mask".
+ sk_sp<SkShader> shader = SkShaders::Blend(SkBlendMode::kSrcIn, shaderAlpha,
+ rSkiaSourceBitmap.GetSkShader(samplingOptions));
+ drawShader(rPosAry, shader);
+ return true;
+}
+
+void SkiaSalGraphicsImpl::drawBitmap(const SalTwoRect& rPosAry, const SalBitmap& rSalBitmap)
+{
+ if (checkInvalidSourceOrDestination(rPosAry))
+ return;
+
+ assert(dynamic_cast<const SkiaSalBitmap*>(&rSalBitmap));
+ const SkiaSalBitmap& rSkiaSourceBitmap = static_cast<const SkiaSalBitmap&>(rSalBitmap);
+
+ drawBitmap(rPosAry, rSkiaSourceBitmap);
+}
+
+void SkiaSalGraphicsImpl::drawBitmap(const SalTwoRect& rPosAry, const SalBitmap& rSalBitmap,
+ const SalBitmap& rMaskBitmap)
+{
+ drawAlphaBitmap(rPosAry, rSalBitmap, rMaskBitmap);
+}
+
+void SkiaSalGraphicsImpl::drawMask(const SalTwoRect& rPosAry, const SalBitmap& rSalBitmap,
+ Color nMaskColor)
+{
+ assert(dynamic_cast<const SkiaSalBitmap*>(&rSalBitmap));
+ const SkiaSalBitmap& skiaBitmap = static_cast<const SkiaSalBitmap&>(rSalBitmap);
+ // SkBlendMode::kDstOut must be used instead of SkBlendMode::kDstIn because
+ // the alpha channel of what is drawn appears to get inverted at some point
+ // after it is drawn
+ drawShader(
+ rPosAry,
+ SkShaders::Blend(SkBlendMode::kDstOut, // VCL alpha is alpha.
+ SkShaders::Color(toSkColor(nMaskColor)),
+ skiaBitmap.GetAlphaSkShader(makeSamplingOptions(rPosAry, mScaling))));
+}
+
+std::shared_ptr<SalBitmap> SkiaSalGraphicsImpl::getBitmap(tools::Long nX, tools::Long nY,
+ tools::Long nWidth, tools::Long nHeight)
+{
+ SkiaZone zone;
+ checkSurface();
+ SAL_INFO("vcl.skia.trace",
+ "getbitmap(" << this << "): " << SkIRect::MakeXYWH(nX, nY, nWidth, nHeight));
+ flushDrawing();
+ // TODO makeImageSnapshot(rect) may copy the data, which may be a waste if this is used
+ // e.g. for VirtualDevice's lame alpha blending, in which case the image will eventually end up
+ // in blendAlphaBitmap(), where we could simply use the proper rect of the image.
+ sk_sp<SkImage> image = makeCheckedImageSnapshot(
+ mSurface, scaleRect(SkIRect::MakeXYWH(nX, nY, nWidth, nHeight), mScaling));
+ std::shared_ptr<SkiaSalBitmap> bitmap = std::make_shared<SkiaSalBitmap>(image);
+ // If the surface is scaled for HiDPI, the bitmap needs to be scaled down, otherwise
+ // it would have incorrect size from the API point of view. The DirectImage::Yes handling
+ // in mergeCacheBitmaps() should access the original unscaled bitmap data to avoid
+ // pointless scaling back and forth.
+ if (mScaling != 1)
+ {
+ if (!isUnitTestRunning())
+ bitmap->Scale(1.0 / mScaling, 1.0 / mScaling, goodScalingQuality());
+ else
+ {
+ // Some tests require exact pixel values and would be confused by smooth-scaling.
+ // And some draw something smooth and not smooth-scaling there would break the checks.
+ if (isUnitTestRunning("BackendTest__testDrawHaflEllipseAAWithPolyLineB2D_")
+ || isUnitTestRunning("BackendTest__testDrawRectAAWithLine_")
+ || isUnitTestRunning("GraphicsRenderTest__testDrawRectAAWithLine"))
+ {
+ bitmap->Scale(1.0 / mScaling, 1.0 / mScaling, goodScalingQuality());
+ }
+ else
+ bitmap->Scale(1.0 / mScaling, 1.0 / mScaling, BmpScaleFlag::NearestNeighbor);
+ }
+ }
+ return bitmap;
+}
+
+Color SkiaSalGraphicsImpl::getPixel(tools::Long nX, tools::Long nY)
+{
+ SkiaZone zone;
+ checkSurface();
+ SAL_INFO("vcl.skia.trace", "getpixel(" << this << "): " << Point(nX, nY));
+ flushDrawing();
+ // This is presumably slow, but getPixel() should be generally used only by unit tests.
+ SkBitmap bitmap;
+ if (!bitmap.tryAllocN32Pixels(mSurface->width(), mSurface->height()))
+ abort();
+ if (!mSurface->readPixels(bitmap, 0, 0))
+ abort();
+ return fromSkColor(bitmap.getColor(nX * mScaling, nY * mScaling));
+}
+
+void SkiaSalGraphicsImpl::invert(basegfx::B2DPolygon const& rPoly, SalInvert eFlags)
+{
+ preDraw();
+ SAL_INFO("vcl.skia.trace", "invert(" << this << "): " << rPoly << ":" << int(eFlags));
+ assert(mXorMode == XorMode::None);
+ SkPath aPath;
+ aPath.incReserve(rPoly.count());
+ addPolygonToPath(rPoly, aPath);
+ aPath.setFillType(SkPathFillType::kEvenOdd);
+ addUpdateRegion(aPath.getBounds());
+ SkAutoCanvasRestore autoRestore(getDrawCanvas(), true);
+ SkPaint aPaint;
+ // There's no blend mode for inverting as such, but kExclusion is 's + d - 2*s*d',
+ // so with d = 1.0 (all channels) it becomes effectively '1 - s', i.e. inverted color.
+ aPaint.setBlendMode(SkBlendMode::kExclusion);
+ aPaint.setColor(SkColorSetARGB(255, 255, 255, 255));
+ // TrackFrame just inverts a dashed path around the polygon
+ if (eFlags == SalInvert::TrackFrame)
+ {
+ // TrackFrame is not supposed to paint outside of the polygon (usually rectangle),
+ // but wider stroke width usually results in that, so ensure the requirement
+ // by clipping.
+ getDrawCanvas()->clipRect(aPath.getBounds(), SkClipOp::kIntersect, false);
+ aPaint.setStrokeWidth(2);
+ constexpr float intervals[] = { 4.0f, 4.0f };
+ aPaint.setStyle(SkPaint::kStroke_Style);
+ aPaint.setPathEffect(SkDashPathEffect::Make(intervals, std::size(intervals), 0));
+ }
+ else
+ {
+ aPaint.setStyle(SkPaint::kFill_Style);
+
+ // N50 inverts in checker pattern
+ if (eFlags == SalInvert::N50)
+ {
+ // This creates 2x2 checker pattern bitmap
+ // TODO Use createSkSurface() and cache the image
+ SkBitmap aBitmap;
+ aBitmap.allocN32Pixels(2, 2);
+ const SkPMColor white = SkPreMultiplyARGB(0xFF, 0xFF, 0xFF, 0xFF);
+ const SkPMColor black = SkPreMultiplyARGB(0xFF, 0x00, 0x00, 0x00);
+ SkPMColor* scanline;
+ scanline = aBitmap.getAddr32(0, 0);
+ *scanline++ = white;
+ *scanline++ = black;
+ scanline = aBitmap.getAddr32(0, 1);
+ *scanline++ = black;
+ *scanline++ = white;
+ aBitmap.setImmutable();
+ // The bitmap is repeated in both directions the checker pattern is as big
+ // as the polygon (usually rectangle)
+ aPaint.setShader(
+ aBitmap.makeShader(SkTileMode::kRepeat, SkTileMode::kRepeat, SkSamplingOptions()));
+ }
+ }
+ getDrawCanvas()->drawPath(aPath, aPaint);
+ postDraw();
+}
+
+void SkiaSalGraphicsImpl::invert(tools::Long nX, tools::Long nY, tools::Long nWidth,
+ tools::Long nHeight, SalInvert eFlags)
+{
+ basegfx::B2DRectangle aRectangle(nX, nY, nX + nWidth, nY + nHeight);
+ auto aRect = basegfx::utils::createPolygonFromRect(aRectangle);
+ invert(aRect, eFlags);
+}
+
+void SkiaSalGraphicsImpl::invert(sal_uInt32 nPoints, const Point* pPointArray, SalInvert eFlags)
+{
+ basegfx::B2DPolygon aPolygon;
+ aPolygon.append(basegfx::B2DPoint(pPointArray[0].getX(), pPointArray[0].getY()), nPoints);
+ for (sal_uInt32 i = 1; i < nPoints; ++i)
+ {
+ aPolygon.setB2DPoint(i, basegfx::B2DPoint(pPointArray[i].getX(), pPointArray[i].getY()));
+ }
+ aPolygon.setClosed(true);
+
+ invert(aPolygon, eFlags);
+}
+
+bool SkiaSalGraphicsImpl::drawEPS(tools::Long, tools::Long, tools::Long, tools::Long, void*,
+ sal_uInt32)
+{
+ return false;
+}
+
+// Create SkImage from a bitmap and possibly an alpha mask (the usual VCL one-minus-alpha),
+// with the given target size. Result will be possibly cached, unless disabled.
+// Especially in raster mode scaling and alpha blending may be expensive if done repeatedly.
+sk_sp<SkImage> SkiaSalGraphicsImpl::mergeCacheBitmaps(const SkiaSalBitmap& bitmap,
+ const SkiaSalBitmap* alphaBitmap,
+ const Size& targetSize)
+{
+ if (alphaBitmap)
+ assert(bitmap.GetSize() == alphaBitmap->GetSize());
+
+ if (targetSize.IsEmpty())
+ return {};
+ if (alphaBitmap && alphaBitmap->IsFullyOpaqueAsAlpha())
+ alphaBitmap = nullptr; // the alpha can be ignored
+ if (bitmap.PreferSkShader() && (!alphaBitmap || alphaBitmap->PreferSkShader()))
+ return {};
+
+ // If the bitmap has SkImage that matches the required size, try to use it, even
+ // if it doesn't match bitmap.GetSize(). This can happen with delayed scaling.
+ // This will catch cases such as some code pre-scaling the bitmap, which would make GetSkImage()
+ // scale, changing GetImageKey() in the process so we'd have to re-cache, and then we'd need
+ // to scale again in this function.
+ bool bitmapReady = false;
+ bool alphaBitmapReady = false;
+ if (const sk_sp<SkImage>& image = bitmap.GetSkImage(DirectImage::Yes))
+ {
+ assert(!bitmap.PreferSkShader());
+ if (imageSize(image) == targetSize)
+ bitmapReady = true;
+ }
+ // If the image usable and there's no alpha, then it matches exactly what's wanted.
+ if (bitmapReady && !alphaBitmap)
+ return bitmap.GetSkImage(DirectImage::Yes);
+ if (alphaBitmap)
+ {
+ if (!alphaBitmap->GetAlphaSkImage(DirectImage::Yes)
+ && alphaBitmap->GetSkImage(DirectImage::Yes)
+ && imageSize(alphaBitmap->GetSkImage(DirectImage::Yes)) == targetSize)
+ {
+ // There's a usable non-alpha image, try to convert it to alpha.
+ assert(!alphaBitmap->PreferSkShader());
+ const_cast<SkiaSalBitmap*>(alphaBitmap)->TryDirectConvertToAlphaNoScaling();
+ }
+ if (const sk_sp<SkImage>& image = alphaBitmap->GetAlphaSkImage(DirectImage::Yes))
+ {
+ assert(!alphaBitmap->PreferSkShader());
+ if (imageSize(image) == targetSize)
+ alphaBitmapReady = true;
+ }
+ }
+
+ if (bitmapReady && (!alphaBitmap || alphaBitmapReady))
+ {
+ // Try to find a cached image based on the already existing images.
+ OString key = makeCachedImageKey(bitmap, alphaBitmap, targetSize, DirectImage::Yes,
+ DirectImage::Yes);
+ if (sk_sp<SkImage> image = findCachedImage(key))
+ {
+ assert(imageSize(image) == targetSize);
+ return image;
+ }
+ }
+
+ // Probably not much point in caching of just doing a copy.
+ if (alphaBitmap == nullptr && targetSize == bitmap.GetSize())
+ return {};
+ // Image too small to be worth caching if not scaling.
+ if (targetSize == bitmap.GetSize() && targetSize.Width() < 100 && targetSize.Height() < 100)
+ return {};
+ // GPU-accelerated drawing with SkShader should be fast enough to not need caching.
+ if (isGPU())
+ {
+ // tdf#140925: But if this is such an extensive downscaling that caching the result
+ // would noticeably reduce amount of data processed by the GPU on repeated usage, do it.
+ int reduceRatio = bitmap.GetSize().Width() * bitmap.GetSize().Height() / targetSize.Width()
+ / targetSize.Height();
+ if (reduceRatio < 10)
+ return {};
+ }
+ // Do not cache the result if it would take most of the cache and thus get evicted soon.
+ if (targetSize.Width() * targetSize.Height() * 4 > maxImageCacheSize() * 0.7)
+ return {};
+
+ // Use ready direct image if they are both available, now even the size doesn't matter
+ // (we'll scale as necessary and it's better to scale from the original). Require only
+ // that they are the same size, or that one prefers a shader or doesn't exist
+ // (i.e. avoid two images of different size).
+ bitmapReady = bitmap.GetSkImage(DirectImage::Yes) != nullptr;
+ alphaBitmapReady = alphaBitmap && alphaBitmap->GetAlphaSkImage(DirectImage::Yes) != nullptr;
+ if (bitmapReady && alphaBitmap && !alphaBitmapReady && !alphaBitmap->PreferSkShader())
+ bitmapReady = false;
+ if (alphaBitmapReady && !bitmapReady && bitmap.PreferSkShader())
+ alphaBitmapReady = false;
+
+ DirectImage bitmapType = bitmapReady ? DirectImage::Yes : DirectImage::No;
+ DirectImage alphaBitmapType = alphaBitmapReady ? DirectImage::Yes : DirectImage::No;
+
+ // Try to find a cached result, this time after possible delayed scaling.
+ OString key = makeCachedImageKey(bitmap, alphaBitmap, targetSize, bitmapType, alphaBitmapType);
+ if (sk_sp<SkImage> image = findCachedImage(key))
+ {
+ assert(imageSize(image) == targetSize);
+ return image;
+ }
+
+ // In some cases (tdf#134237) the target size may be very large. In that case it's
+ // better to rely on Skia to clip and draw only the necessary, rather than prepare
+ // a very large image only to not use most of it. Do this only after checking whether
+ // the image is already cached, since it might have been already cached in a previous
+ // call that had the draw area large enough to be seen as worth caching.
+ const Size drawAreaSize = mClipRegion.GetBoundRect().GetSize() * mScaling;
+ if (targetSize.Width() > drawAreaSize.Width() || targetSize.Height() > drawAreaSize.Height())
+ {
+ // This is a bit tricky. The condition above just checks that at least a part of the resulting
+ // image will not be used (it's larger then our drawing area). But this may often happen
+ // when just scrolling a document with a large image, where the caching may very well be worth it.
+ // Since the problem is mainly the cost of upscaling and then the size of the resulting bitmap,
+ // compute a ratio of how much this is going to be scaled up, how much this is larger than
+ // the drawing area, and then refuse to cache if it's too much.
+ const double upscaleRatio
+ = std::max(1.0, 1.0 * targetSize.Width() / bitmap.GetSize().Width()
+ * targetSize.Height() / bitmap.GetSize().Height());
+ const double oversizeRatio = 1.0 * targetSize.Width() / drawAreaSize.Width()
+ * targetSize.Height() / drawAreaSize.Height();
+ const double ratio = upscaleRatio * oversizeRatio;
+ if (ratio > 4)
+ {
+ SAL_INFO("vcl.skia.trace", "mergecachebitmaps("
+ << this << "): not caching, ratio:" << ratio << ", "
+ << bitmap.GetSize() << "->" << targetSize << " in "
+ << drawAreaSize);
+ return {};
+ }
+ }
+
+ Size sourceSize;
+ if (bitmapReady)
+ sourceSize = imageSize(bitmap.GetSkImage(DirectImage::Yes));
+ else if (alphaBitmapReady)
+ sourceSize = imageSize(alphaBitmap->GetAlphaSkImage(DirectImage::Yes));
+ else
+ sourceSize = bitmap.GetSize();
+
+ // Generate a new result and cache it.
+ sk_sp<SkSurface> tmpSurface
+ = createSkSurface(targetSize, alphaBitmap ? kPremul_SkAlphaType : bitmap.alphaType());
+ if (!tmpSurface)
+ return nullptr;
+ SkCanvas* canvas = tmpSurface->getCanvas();
+ SkAutoCanvasRestore autoRestore(canvas, true);
+ SkPaint paint;
+ SkSamplingOptions samplingOptions;
+ if (targetSize != sourceSize)
+ {
+ SkMatrix matrix;
+ matrix.set(SkMatrix::kMScaleX, 1.0 * targetSize.Width() / sourceSize.Width());
+ matrix.set(SkMatrix::kMScaleY, 1.0 * targetSize.Height() / sourceSize.Height());
+ canvas->concat(matrix);
+ if (!isUnitTestRunning()) // unittests want exact pixel values
+ samplingOptions = makeSamplingOptions(matrix, 1);
+ }
+ if (alphaBitmap != nullptr)
+ {
+ canvas->clear(SK_ColorTRANSPARENT);
+ paint.setShader(
+ SkShaders::Blend(SkBlendMode::kDstIn, bitmap.GetSkShader(samplingOptions, bitmapType),
+ alphaBitmap->GetAlphaSkShader(samplingOptions, alphaBitmapType)));
+ canvas->drawPaint(paint);
+ }
+ else if (bitmap.PreferSkShader())
+ {
+ paint.setShader(bitmap.GetSkShader(samplingOptions, bitmapType));
+ canvas->drawPaint(paint);
+ }
+ else
+ canvas->drawImage(bitmap.GetSkImage(bitmapType), 0, 0, samplingOptions, &paint);
+ if (isGPU())
+ SAL_INFO("vcl.skia.trace", "mergecachebitmaps(" << this << "): caching GPU downscaling:"
+ << bitmap.GetSize() << "->" << targetSize);
+ sk_sp<SkImage> image = makeCheckedImageSnapshot(tmpSurface);
+ addCachedImage(key, image);
+ return image;
+}
+
+OString SkiaSalGraphicsImpl::makeCachedImageKey(const SkiaSalBitmap& bitmap,
+ const SkiaSalBitmap* alphaBitmap,
+ const Size& targetSize, DirectImage bitmapType,
+ DirectImage alphaBitmapType)
+{
+ OString key = OString::number(targetSize.Width()) + "x" + OString::number(targetSize.Height())
+ + "_" + bitmap.GetImageKey(bitmapType);
+ if (alphaBitmap)
+ key += "_" + alphaBitmap->GetAlphaImageKey(alphaBitmapType);
+ return key;
+}
+
+bool SkiaSalGraphicsImpl::drawAlphaBitmap(const SalTwoRect& rPosAry, const SalBitmap& rSourceBitmap,
+ const SalBitmap& rAlphaBitmap)
+{
+ assert(dynamic_cast<const SkiaSalBitmap*>(&rSourceBitmap));
+ assert(dynamic_cast<const SkiaSalBitmap*>(&rAlphaBitmap));
+ const SkiaSalBitmap& rSkiaSourceBitmap = static_cast<const SkiaSalBitmap&>(rSourceBitmap);
+ const SkiaSalBitmap& rSkiaAlphaBitmap = static_cast<const SkiaSalBitmap&>(rAlphaBitmap);
+ // Use mergeCacheBitmaps(), which may decide to cache the result, avoiding repeated
+ // alpha blending or scaling.
+ SalTwoRect imagePosAry(rPosAry);
+ Size imageSize = rSourceBitmap.GetSize();
+ // If the bitmap will be scaled, prefer to do it in mergeCacheBitmaps(), if possible.
+ if ((rPosAry.mnSrcWidth != rPosAry.mnDestWidth || rPosAry.mnSrcHeight != rPosAry.mnDestHeight)
+ && rPosAry.mnSrcX == 0 && rPosAry.mnSrcY == 0
+ && rPosAry.mnSrcWidth == rSourceBitmap.GetSize().Width()
+ && rPosAry.mnSrcHeight == rSourceBitmap.GetSize().Height())
+ {
+ imagePosAry.mnSrcWidth = imagePosAry.mnDestWidth;
+ imagePosAry.mnSrcHeight = imagePosAry.mnDestHeight;
+ imageSize = Size(imagePosAry.mnSrcWidth, imagePosAry.mnSrcHeight);
+ }
+ sk_sp<SkImage> image
+ = mergeCacheBitmaps(rSkiaSourceBitmap, &rSkiaAlphaBitmap, imageSize * mScaling);
+ if (image)
+ drawImage(imagePosAry, image, mScaling);
+ else if (rSkiaAlphaBitmap.IsFullyOpaqueAsAlpha()
+ && !rSkiaSourceBitmap.PreferSkShader()) // alpha can be ignored
+ drawBitmap(rPosAry, rSkiaSourceBitmap);
+ else
+ drawShader(rPosAry,
+ SkShaders::Blend(
+ SkBlendMode::kDstIn,
+ rSkiaSourceBitmap.GetSkShader(makeSamplingOptions(rPosAry, mScaling)),
+ rSkiaAlphaBitmap.GetAlphaSkShader(makeSamplingOptions(rPosAry, mScaling))));
+ return true;
+}
+
+void SkiaSalGraphicsImpl::drawBitmap(const SalTwoRect& rPosAry, const SkiaSalBitmap& bitmap,
+ SkBlendMode blendMode)
+{
+ // Use mergeCacheBitmaps(), which may decide to cache the result, avoiding repeated
+ // scaling.
+ SalTwoRect imagePosAry(rPosAry);
+ Size imageSize = bitmap.GetSize();
+ // If the bitmap will be scaled, prefer to do it in mergeCacheBitmaps(), if possible.
+ if ((rPosAry.mnSrcWidth != rPosAry.mnDestWidth || rPosAry.mnSrcHeight != rPosAry.mnDestHeight)
+ && rPosAry.mnSrcX == 0 && rPosAry.mnSrcY == 0
+ && rPosAry.mnSrcWidth == bitmap.GetSize().Width()
+ && rPosAry.mnSrcHeight == bitmap.GetSize().Height())
+ {
+ imagePosAry.mnSrcWidth = imagePosAry.mnDestWidth;
+ imagePosAry.mnSrcHeight = imagePosAry.mnDestHeight;
+ imageSize = Size(imagePosAry.mnSrcWidth, imagePosAry.mnSrcHeight);
+ }
+ sk_sp<SkImage> image = mergeCacheBitmaps(bitmap, nullptr, imageSize * mScaling);
+ if (image)
+ drawImage(imagePosAry, image, mScaling, blendMode);
+ else if (bitmap.PreferSkShader())
+ drawShader(rPosAry, bitmap.GetSkShader(makeSamplingOptions(rPosAry, mScaling)), blendMode);
+ else
+ drawImage(rPosAry, bitmap.GetSkImage(), 1, blendMode);
+}
+
+void SkiaSalGraphicsImpl::drawImage(const SalTwoRect& rPosAry, const sk_sp<SkImage>& aImage,
+ int srcScaling, SkBlendMode eBlendMode)
+{
+ SkRect aSourceRect
+ = SkRect::MakeXYWH(rPosAry.mnSrcX, rPosAry.mnSrcY, rPosAry.mnSrcWidth, rPosAry.mnSrcHeight);
+ if (srcScaling != 1)
+ aSourceRect = scaleRect(aSourceRect, srcScaling);
+ SkRect aDestinationRect = SkRect::MakeXYWH(rPosAry.mnDestX, rPosAry.mnDestY,
+ rPosAry.mnDestWidth, rPosAry.mnDestHeight);
+
+ SkPaint aPaint = makeBitmapPaint();
+ aPaint.setBlendMode(eBlendMode);
+
+ preDraw();
+ SAL_INFO("vcl.skia.trace",
+ "drawimage(" << this << "): " << rPosAry << ":" << SkBlendMode_Name(eBlendMode));
+ addUpdateRegion(aDestinationRect);
+ getDrawCanvas()->drawImageRect(aImage, aSourceRect, aDestinationRect,
+ makeSamplingOptions(rPosAry, mScaling, srcScaling), &aPaint,
+ SkCanvas::kFast_SrcRectConstraint);
+ ++pendingOperationsToFlush; // tdf#136369
+ postDraw();
+}
+
+// SkShader can be used to merge multiple bitmaps with appropriate blend modes (e.g. when
+// merging a bitmap with its alpha mask).
+void SkiaSalGraphicsImpl::drawShader(const SalTwoRect& rPosAry, const sk_sp<SkShader>& shader,
+ SkBlendMode blendMode)
+{
+ preDraw();
+ SAL_INFO("vcl.skia.trace", "drawshader(" << this << "): " << rPosAry);
+ SkRect destinationRect = SkRect::MakeXYWH(rPosAry.mnDestX, rPosAry.mnDestY, rPosAry.mnDestWidth,
+ rPosAry.mnDestHeight);
+ addUpdateRegion(destinationRect);
+ SkPaint paint = makeBitmapPaint();
+ paint.setBlendMode(blendMode);
+ paint.setShader(shader);
+ SkCanvas* canvas = getDrawCanvas();
+ // Scaling needs to be done explicitly using a matrix.
+ SkAutoCanvasRestore autoRestore(canvas, true);
+ SkMatrix matrix = SkMatrix::Translate(rPosAry.mnDestX, rPosAry.mnDestY)
+ * SkMatrix::Scale(1.0 * rPosAry.mnDestWidth / rPosAry.mnSrcWidth,
+ 1.0 * rPosAry.mnDestHeight / rPosAry.mnSrcHeight)
+ * SkMatrix::Translate(-rPosAry.mnSrcX, -rPosAry.mnSrcY);
+#ifndef NDEBUG
+ // Handle floating point imprecisions, round p1 to 2 decimal places.
+ auto compareRounded = [](const SkPoint& p1, const SkPoint& p2) {
+ return rtl::math::round(p1.x(), 2) == p2.x() && rtl::math::round(p1.y(), 2) == p2.y();
+ };
+#endif
+ assert(compareRounded(matrix.mapXY(rPosAry.mnSrcX, rPosAry.mnSrcY),
+ SkPoint::Make(rPosAry.mnDestX, rPosAry.mnDestY)));
+ assert(compareRounded(
+ matrix.mapXY(rPosAry.mnSrcX + rPosAry.mnSrcWidth, rPosAry.mnSrcY + rPosAry.mnSrcHeight),
+ SkPoint::Make(rPosAry.mnDestX + rPosAry.mnDestWidth,
+ rPosAry.mnDestY + rPosAry.mnDestHeight)));
+ canvas->concat(matrix);
+ SkRect sourceRect
+ = SkRect::MakeXYWH(rPosAry.mnSrcX, rPosAry.mnSrcY, rPosAry.mnSrcWidth, rPosAry.mnSrcHeight);
+ canvas->drawRect(sourceRect, paint);
+ postDraw();
+}
+
+bool SkiaSalGraphicsImpl::hasFastDrawTransformedBitmap() const
+{
+ // Return true even in raster mode, even that way Skia is faster than e.g. GraphicObject
+ // trying to handle stuff manually.
+ return true;
+}
+
+// Whether applying matrix needs image smoothing for the transformation.
+static bool matrixNeedsHighQuality(const SkMatrix& matrix)
+{
+ if (matrix.isIdentity())
+ return false;
+ if (matrix.isScaleTranslate())
+ {
+ if (abs(matrix.getScaleX()) == 1 && abs(matrix.getScaleY()) == 1)
+ return false; // Only at most flipping and keeping the size.
+ return true;
+ }
+ assert(!matrix.hasPerspective()); // we do not use this
+ if (matrix.getScaleX() == 0 && matrix.getScaleY() == 0)
+ {
+ // Rotating 90 or 270 degrees while keeping the size.
+ if ((matrix.getSkewX() == 1 && matrix.getSkewY() == -1)
+ || (matrix.getSkewX() == -1 && matrix.getSkewY() == 1))
+ return false;
+ }
+ return true;
+}
+
+namespace SkiaTests
+{
+bool matrixNeedsHighQuality(const SkMatrix& matrix) { return ::matrixNeedsHighQuality(matrix); }
+}
+
+bool SkiaSalGraphicsImpl::drawTransformedBitmap(const basegfx::B2DPoint& rNull,
+ const basegfx::B2DPoint& rX,
+ const basegfx::B2DPoint& rY,
+ const SalBitmap& rSourceBitmap,
+ const SalBitmap* pAlphaBitmap, double fAlpha)
+{
+ assert(dynamic_cast<const SkiaSalBitmap*>(&rSourceBitmap));
+ assert(!pAlphaBitmap || dynamic_cast<const SkiaSalBitmap*>(pAlphaBitmap));
+
+ const SkiaSalBitmap& rSkiaBitmap = static_cast<const SkiaSalBitmap&>(rSourceBitmap);
+ const SkiaSalBitmap* pSkiaAlphaBitmap = static_cast<const SkiaSalBitmap*>(pAlphaBitmap);
+
+ if (pSkiaAlphaBitmap && pSkiaAlphaBitmap->IsFullyOpaqueAsAlpha())
+ pSkiaAlphaBitmap = nullptr; // the alpha can be ignored
+
+ // Setup the image transformation,
+ // using the rNull, rX, rY points as destinations for the (0,0), (Width,0), (0,Height) source points.
+ const basegfx::B2DVector aXRel = rX - rNull;
+ const basegfx::B2DVector aYRel = rY - rNull;
+
+ preDraw();
+ SAL_INFO("vcl.skia.trace", "drawtransformedbitmap(" << this << "): " << rSourceBitmap.GetSize()
+ << " " << rNull << ":" << rX << ":" << rY);
+
+ addUpdateRegion(SkRect::MakeWH(GetWidth(), GetHeight())); // can't tell, use whole area
+ // Use mergeCacheBitmaps(), which may decide to cache the result, avoiding repeated
+ // alpha blending or scaling.
+ // The extra fAlpha blending is not cached, with the assumption that it usually gradually changes
+ // for each invocation.
+ // Pass size * mScaling to mergeCacheBitmaps() so that it prepares the size that will be needed
+ // after the mScaling-scaling matrix, but otherwise calculate everything else using the VCL coordinates.
+ Size imageSize(round(aXRel.getLength()), round(aYRel.getLength()));
+ sk_sp<SkImage> imageToDraw
+ = mergeCacheBitmaps(rSkiaBitmap, pSkiaAlphaBitmap, imageSize * mScaling);
+ if (imageToDraw)
+ {
+ SkMatrix matrix;
+ // Round sizes for scaling, so that sub-pixel differences don't
+ // trigger unnecessary scaling. Image has already been scaled
+ // by mergeCacheBitmaps() and we shouldn't scale here again
+ // unless the drawing is also skewed.
+ matrix.set(SkMatrix::kMScaleX, round(aXRel.getX()) / imageSize.Width());
+ matrix.set(SkMatrix::kMScaleY, round(aYRel.getY()) / imageSize.Height());
+ matrix.set(SkMatrix::kMSkewY, aXRel.getY() / imageSize.Width());
+ matrix.set(SkMatrix::kMSkewX, aYRel.getX() / imageSize.Height());
+ matrix.set(SkMatrix::kMTransX, rNull.getX());
+ matrix.set(SkMatrix::kMTransY, rNull.getY());
+ SkCanvas* canvas = getDrawCanvas();
+ SkAutoCanvasRestore autoRestore(canvas, true);
+ canvas->concat(matrix);
+ SkSamplingOptions samplingOptions;
+ // If the matrix changes geometry, we need to smooth-scale. If there's mScaling,
+ // that's already been handled by mergeCacheBitmaps().
+ if (matrixNeedsHighQuality(matrix))
+ samplingOptions = makeSamplingOptions(matrix, 1);
+ if (fAlpha == 1.0)
+ {
+ // Specify sizes to scale the image size back if needed (because of mScaling).
+ SkRect dstRect = SkRect::MakeWH(imageSize.Width(), imageSize.Height());
+ SkRect srcRect = SkRect::MakeWH(imageToDraw->width(), imageToDraw->height());
+ SkPaint paint = makeBitmapPaint();
+ canvas->drawImageRect(imageToDraw, srcRect, dstRect, samplingOptions, &paint,
+ SkCanvas::kFast_SrcRectConstraint);
+ }
+ else
+ {
+ SkPaint paint = makeBitmapPaint();
+ // Scale the image size back if needed.
+ SkMatrix scale = SkMatrix::Scale(1.0 / mScaling, 1.0 / mScaling);
+ paint.setShader(SkShaders::Blend(
+ SkBlendMode::kDstIn, imageToDraw->makeShader(samplingOptions, &scale),
+ SkShaders::Color(SkColorSetARGB(fAlpha * 255, 0, 0, 0))));
+ canvas->drawRect(SkRect::MakeWH(imageSize.Width(), imageSize.Height()), paint);
+ }
+ }
+ else
+ {
+ SkMatrix matrix;
+ const Size aSize = rSourceBitmap.GetSize();
+ matrix.set(SkMatrix::kMScaleX, aXRel.getX() / aSize.Width());
+ matrix.set(SkMatrix::kMScaleY, aYRel.getY() / aSize.Height());
+ matrix.set(SkMatrix::kMSkewY, aXRel.getY() / aSize.Width());
+ matrix.set(SkMatrix::kMSkewX, aYRel.getX() / aSize.Height());
+ matrix.set(SkMatrix::kMTransX, rNull.getX());
+ matrix.set(SkMatrix::kMTransY, rNull.getY());
+ SkCanvas* canvas = getDrawCanvas();
+ SkAutoCanvasRestore autoRestore(canvas, true);
+ canvas->concat(matrix);
+ SkSamplingOptions samplingOptions;
+ if (matrixNeedsHighQuality(matrix) || (mScaling != 1 && !isUnitTestRunning()))
+ samplingOptions = makeSamplingOptions(matrix, mScaling);
+ if (pSkiaAlphaBitmap)
+ {
+ SkPaint paint = makeBitmapPaint();
+ paint.setShader(SkShaders::Blend(SkBlendMode::kDstIn,
+ rSkiaBitmap.GetSkShader(samplingOptions),
+ pSkiaAlphaBitmap->GetAlphaSkShader(samplingOptions)));
+ if (fAlpha != 1.0)
+ paint.setShader(
+ SkShaders::Blend(SkBlendMode::kDstIn, paint.refShader(),
+ SkShaders::Color(SkColorSetARGB(fAlpha * 255, 0, 0, 0))));
+ canvas->drawRect(SkRect::MakeWH(aSize.Width(), aSize.Height()), paint);
+ }
+ else if (rSkiaBitmap.PreferSkShader() || fAlpha != 1.0)
+ {
+ SkPaint paint = makeBitmapPaint();
+ paint.setShader(rSkiaBitmap.GetSkShader(samplingOptions));
+ if (fAlpha != 1.0)
+ paint.setShader(
+ SkShaders::Blend(SkBlendMode::kDstIn, paint.refShader(),
+ SkShaders::Color(SkColorSetARGB(fAlpha * 255, 0, 0, 0))));
+ canvas->drawRect(SkRect::MakeWH(aSize.Width(), aSize.Height()), paint);
+ }
+ else
+ {
+ SkPaint paint = makeBitmapPaint();
+ canvas->drawImage(rSkiaBitmap.GetSkImage(), 0, 0, samplingOptions, &paint);
+ }
+ }
+ postDraw();
+ return true;
+}
+
+bool SkiaSalGraphicsImpl::drawAlphaRect(tools::Long nX, tools::Long nY, tools::Long nWidth,
+ tools::Long nHeight, sal_uInt8 nTransparency)
+{
+ privateDrawAlphaRect(nX, nY, nWidth, nHeight, nTransparency / 100.0);
+ return true;
+}
+
+bool SkiaSalGraphicsImpl::drawGradient(const tools::PolyPolygon& rPolyPolygon,
+ const Gradient& rGradient)
+{
+ if (rGradient.GetStyle() != css::awt::GradientStyle_LINEAR
+ && rGradient.GetStyle() != css::awt::GradientStyle_AXIAL
+ && rGradient.GetStyle() != css::awt::GradientStyle_RADIAL)
+ return false; // unsupported
+ if (rGradient.GetSteps() != 0)
+ return false; // We can't tell Skia how many colors to use in the gradient.
+ preDraw();
+ SAL_INFO("vcl.skia.trace", "drawgradient(" << this << "): " << rPolyPolygon.getB2DPolyPolygon()
+ << ":" << static_cast<int>(rGradient.GetStyle()));
+ tools::Rectangle boundRect(rPolyPolygon.GetBoundRect());
+ if (boundRect.IsEmpty())
+ return true;
+ SkPath path;
+ if (rPolyPolygon.IsRect())
+ {
+ // Rect->Polygon conversion loses the right and bottom edge, fix that.
+ path.addRect(SkRect::MakeXYWH(boundRect.getX(), boundRect.getY(), boundRect.GetWidth(),
+ boundRect.GetHeight()));
+ boundRect.AdjustRight(1);
+ boundRect.AdjustBottom(1);
+ }
+ else
+ addPolyPolygonToPath(rPolyPolygon.getB2DPolyPolygon(), path);
+ path.setFillType(SkPathFillType::kEvenOdd);
+ addUpdateRegion(path.getBounds());
+
+ Gradient aGradient(rGradient);
+ tools::Rectangle aBoundRect;
+ Point aCenter;
+ aGradient.SetAngle(aGradient.GetAngle() + 2700_deg10);
+ aGradient.GetBoundRect(boundRect, aBoundRect, aCenter);
+
+ SkColor startColor
+ = toSkColorWithIntensity(rGradient.GetStartColor(), rGradient.GetStartIntensity());
+ SkColor endColor = toSkColorWithIntensity(rGradient.GetEndColor(), rGradient.GetEndIntensity());
+
+ sk_sp<SkShader> shader;
+ if (rGradient.GetStyle() == css::awt::GradientStyle_LINEAR)
+ {
+ tools::Polygon aPoly(aBoundRect);
+ aPoly.Rotate(aCenter, aGradient.GetAngle() % 3600_deg10);
+ SkPoint points[2] = { SkPoint::Make(toSkX(aPoly[0].X()), toSkY(aPoly[0].Y())),
+ SkPoint::Make(toSkX(aPoly[1].X()), toSkY(aPoly[1].Y())) };
+ SkColor colors[2] = { startColor, endColor };
+ SkScalar pos[2] = { SkDoubleToScalar(aGradient.GetBorder() / 100.0), 1.0 };
+ shader = SkGradientShader::MakeLinear(points, colors, pos, 2, SkTileMode::kClamp);
+ }
+ else if (rGradient.GetStyle() == css::awt::GradientStyle_AXIAL)
+ {
+ tools::Polygon aPoly(aBoundRect);
+ aPoly.Rotate(aCenter, aGradient.GetAngle() % 3600_deg10);
+ SkPoint points[2] = { SkPoint::Make(toSkX(aPoly[0].X()), toSkY(aPoly[0].Y())),
+ SkPoint::Make(toSkX(aPoly[1].X()), toSkY(aPoly[1].Y())) };
+ SkColor colors[3] = { endColor, startColor, endColor };
+ SkScalar border = SkDoubleToScalar(aGradient.GetBorder() / 100.0);
+ SkScalar pos[3] = { std::min<SkScalar>(border * 0.5f, 0.5f), 0.5f,
+ std::max<SkScalar>(1 - border * 0.5f, 0.5f) };
+ shader = SkGradientShader::MakeLinear(points, colors, pos, 3, SkTileMode::kClamp);
+ }
+ else
+ {
+ // Move the center by (-1,-1) (the default VCL algorithm is a bit off-center that way,
+ // Skia is the opposite way).
+ SkPoint center = SkPoint::Make(toSkX(aCenter.X()) - 1, toSkY(aCenter.Y()) - 1);
+ SkScalar radius = std::max(aBoundRect.GetWidth() / 2.0, aBoundRect.GetHeight() / 2.0);
+ SkColor colors[2] = { endColor, startColor };
+ SkScalar pos[2] = { SkDoubleToScalar(aGradient.GetBorder() / 100.0), 1.0 };
+ shader = SkGradientShader::MakeRadial(center, radius, colors, pos, 2, SkTileMode::kClamp);
+ }
+
+ SkPaint paint = makeGradientPaint();
+ paint.setAntiAlias(mParent.getAntiAlias());
+ paint.setShader(shader);
+ getDrawCanvas()->drawPath(path, paint);
+ postDraw();
+ return true;
+}
+
+bool SkiaSalGraphicsImpl::implDrawGradient(const basegfx::B2DPolyPolygon& rPolyPolygon,
+ const SalGradient& rGradient)
+{
+ preDraw();
+ SAL_INFO("vcl.skia.trace",
+ "impldrawgradient(" << this << "): " << rPolyPolygon << ":" << rGradient.maPoint1
+ << "->" << rGradient.maPoint2 << ":" << rGradient.maStops.size());
+
+ SkPath path;
+ addPolyPolygonToPath(rPolyPolygon, path);
+ path.setFillType(SkPathFillType::kEvenOdd);
+ addUpdateRegion(path.getBounds());
+
+ SkPoint points[2]
+ = { SkPoint::Make(toSkX(rGradient.maPoint1.getX()), toSkY(rGradient.maPoint1.getY())),
+ SkPoint::Make(toSkX(rGradient.maPoint2.getX()), toSkY(rGradient.maPoint2.getY())) };
+ std::vector<SkColor> colors;
+ std::vector<SkScalar> pos;
+ for (const SalGradientStop& stop : rGradient.maStops)
+ {
+ colors.emplace_back(toSkColor(stop.maColor));
+ pos.emplace_back(stop.mfOffset);
+ }
+ sk_sp<SkShader> shader = SkGradientShader::MakeLinear(points, colors.data(), pos.data(),
+ colors.size(), SkTileMode::kDecal);
+ SkPaint paint = makeGradientPaint();
+ paint.setAntiAlias(mParent.getAntiAlias());
+ paint.setShader(shader);
+ getDrawCanvas()->drawPath(path, paint);
+ postDraw();
+ return true;
+}
+
+static double toRadian(Degree10 degree10th) { return toRadians(3600_deg10 - degree10th); }
+static double toCos(Degree10 degree10th) { return SkScalarCos(toRadian(degree10th)); }
+static double toSin(Degree10 degree10th) { return SkScalarSin(toRadian(degree10th)); }
+
+void SkiaSalGraphicsImpl::drawGenericLayout(const GenericSalLayout& layout, Color textColor,
+ const SkFont& font, const SkFont& verticalFont)
+{
+ SkiaZone zone;
+ std::vector<SkGlyphID> glyphIds;
+ std::vector<SkRSXform> glyphForms;
+ std::vector<bool> verticals;
+ glyphIds.reserve(256);
+ glyphForms.reserve(256);
+ verticals.reserve(256);
+ basegfx::B2DPoint aPos;
+ const GlyphItem* pGlyph;
+ int nStart = 0;
+ while (layout.GetNextGlyph(&pGlyph, aPos, nStart))
+ {
+ glyphIds.push_back(pGlyph->glyphId());
+ Degree10 angle = layout.GetOrientation();
+ if (pGlyph->IsVertical())
+ angle += 900_deg10;
+ SkRSXform form = SkRSXform::Make(toCos(angle), toSin(angle), aPos.getX(), aPos.getY());
+ glyphForms.emplace_back(std::move(form));
+ verticals.emplace_back(pGlyph->IsVertical());
+ }
+ if (glyphIds.empty())
+ return;
+
+ preDraw();
+ auto getBoundRect = [&layout]() {
+ tools::Rectangle rect;
+ layout.GetBoundRect(rect);
+ return rect;
+ };
+ SAL_INFO("vcl.skia.trace", "drawtextblob(" << this << "): " << getBoundRect() << ", "
+ << glyphIds.size() << " glyphs, " << textColor);
+
+ // Vertical glyphs need a different font, so split drawing into runs that each
+ // draw only consecutive horizontal or vertical glyphs.
+ std::vector<bool>::const_iterator pos = verticals.cbegin();
+ std::vector<bool>::const_iterator end = verticals.cend();
+ while (pos != end)
+ {
+ bool verticalRun = *pos;
+ std::vector<bool>::const_iterator rangeEnd = std::find(pos + 1, end, !verticalRun);
+ size_t index = pos - verticals.cbegin();
+ size_t count = rangeEnd - pos;
+ sk_sp<SkTextBlob> textBlob = SkTextBlob::MakeFromRSXform(
+ glyphIds.data() + index, count * sizeof(SkGlyphID), glyphForms.data() + index,
+ verticalRun ? verticalFont : font, SkTextEncoding::kGlyphID);
+ addUpdateRegion(textBlob->bounds());
+ SkPaint paint = makeTextPaint(textColor);
+ getDrawCanvas()->drawTextBlob(textBlob, 0, 0, paint);
+ pos = rangeEnd;
+ }
+ postDraw();
+}
+
+bool SkiaSalGraphicsImpl::supportsOperation(OutDevSupportType eType) const
+{
+ switch (eType)
+ {
+ case OutDevSupportType::TransparentRect:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static int getScaling()
+{
+ // It makes sense to support the debugging flag on all platforms
+ // for unittests purpose, even if the actual windows cannot do it.
+ if (const char* env = getenv("SAL_FORCE_HIDPI_SCALING"))
+ return atoi(env);
+ return 1;
+}
+
+int SkiaSalGraphicsImpl::getWindowScaling() const
+{
+ static const int scaling = getScaling();
+ return scaling;
+}
+
+void SkiaSalGraphicsImpl::dump(const char* file) const
+{
+ assert(mSurface.get());
+ SkiaHelper::dump(mSurface, file);
+}
+
+void SkiaSalGraphicsImpl::windowBackingPropertiesChanged()
+{
+ if (mInWindowBackingPropertiesChanged || !isGPU())
+ return;
+
+ mInWindowBackingPropertiesChanged = true;
+ performFlush();
+ mInWindowBackingPropertiesChanged = false;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */