summaryrefslogtreecommitdiffstats
path: root/vcl/skia/salbmp.cxx
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 09:06:44 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 09:06:44 +0000
commited5640d8b587fbcfed7dd7967f3de04b37a76f26 (patch)
tree7a5f7c6c9d02226d7471cb3cc8fbbf631b415303 /vcl/skia/salbmp.cxx
parentInitial commit. (diff)
downloadlibreoffice-ed5640d8b587fbcfed7dd7967f3de04b37a76f26.tar.xz
libreoffice-ed5640d8b587fbcfed7dd7967f3de04b37a76f26.zip
Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r--vcl/skia/salbmp.cxx1406
1 files changed, 1406 insertions, 0 deletions
diff --git a/vcl/skia/salbmp.cxx b/vcl/skia/salbmp.cxx
new file mode 100644
index 000000000..df3536b4d
--- /dev/null
+++ b/vcl/skia/salbmp.cxx
@@ -0,0 +1,1406 @@
+/* -*- 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/salbmp.hxx>
+
+#include <o3tl/safeint.hxx>
+#include <tools/helpers.hxx>
+#include <boost/smart_ptr/make_shared.hpp>
+
+#include <salgdi.hxx>
+#include <salinst.hxx>
+#include <scanlinewriter.hxx>
+#include <svdata.hxx>
+#include <bitmap/bmpfast.hxx>
+#include <vcl/BitmapReadAccess.hxx>
+
+#include <skia/utils.hxx>
+#include <skia/zone.hxx>
+
+#include <SkCanvas.h>
+#include <SkImage.h>
+#include <SkPixelRef.h>
+#include <SkSurface.h>
+#include <SkSwizzle.h>
+#include <SkColorFilter.h>
+#include <SkColorMatrix.h>
+#include <skia_opts.hxx>
+
+#ifdef DBG_UTIL
+#include <fstream>
+#define CANARY "skia-canary"
+#endif
+
+using namespace SkiaHelper;
+
+// As constexpr here, evaluating it directly in code makes Clang warn about unreachable code.
+constexpr bool kN32_SkColorTypeIsBGRA = (kN32_SkColorType == kBGRA_8888_SkColorType);
+
+SkiaSalBitmap::SkiaSalBitmap() {}
+
+SkiaSalBitmap::~SkiaSalBitmap() {}
+
+SkiaSalBitmap::SkiaSalBitmap(const sk_sp<SkImage>& image)
+{
+ ResetAllData();
+ mImage = image;
+ mPalette = BitmapPalette();
+#if SKIA_USE_BITMAP32
+ mBitCount = 32;
+#else
+ mBitCount = 24;
+#endif
+ mSize = mPixelsSize = Size(image->width(), image->height());
+ ComputeScanlineSize();
+ mAnyAccessCount = 0;
+#ifdef DBG_UTIL
+ mWriteAccessCount = 0;
+#endif
+ SAL_INFO("vcl.skia.trace", "bitmapfromimage(" << this << ")");
+}
+
+bool SkiaSalBitmap::Create(const Size& rSize, vcl::PixelFormat ePixelFormat,
+ const BitmapPalette& rPal)
+{
+ assert(mAnyAccessCount == 0);
+ ResetAllData();
+ if (ePixelFormat == vcl::PixelFormat::INVALID)
+ return false;
+ mPalette = rPal;
+ mBitCount = vcl::pixelFormatBitCount(ePixelFormat);
+ mSize = rSize;
+ ResetPendingScaling();
+ if (!ComputeScanlineSize())
+ {
+ mBitCount = 0;
+ mSize = mPixelsSize = Size();
+ mScanlineSize = 0;
+ mPalette = BitmapPalette();
+ return false;
+ }
+ SAL_INFO("vcl.skia.trace", "create(" << this << ")");
+ return true;
+}
+
+bool SkiaSalBitmap::ComputeScanlineSize()
+{
+ int bitScanlineWidth;
+ if (o3tl::checked_multiply<int>(mPixelsSize.Width(), mBitCount, bitScanlineWidth))
+ {
+ SAL_WARN("vcl.skia", "checked multiply failed");
+ return false;
+ }
+ mScanlineSize = AlignedWidth4Bytes(bitScanlineWidth);
+ return true;
+}
+
+void SkiaSalBitmap::CreateBitmapData()
+{
+ assert(!mBuffer);
+ // Make sure code has not missed calling ComputeScanlineSize().
+ assert(mScanlineSize == int(AlignedWidth4Bytes(mPixelsSize.Width() * mBitCount)));
+ // The pixels could be stored in SkBitmap, but Skia only supports 8bit gray, 16bit and 32bit formats
+ // (e.g. 24bpp is actually stored as 32bpp). But some of our code accessing the bitmap assumes that
+ // when it asked for 24bpp, the format really will be 24bpp (e.g. the png loader), so we cannot use
+ // SkBitmap to store the data. And even 8bpp is problematic, since Skia does not support palettes
+ // and a VCL bitmap can change its grayscale status simply by changing the palette.
+ // Moreover creating SkImage from SkBitmap does a data copy unless the bitmap is immutable.
+ // So just always store pixels in our buffer and convert as necessary.
+ if (mScanlineSize == 0 || mPixelsSize.Height() == 0)
+ return;
+
+ size_t allocate = mScanlineSize * mPixelsSize.Height();
+#ifdef DBG_UTIL
+ allocate += sizeof(CANARY);
+#endif
+ mBuffer = boost::make_shared_noinit<sal_uInt8[]>(allocate);
+#ifdef DBG_UTIL
+ // fill with random garbage
+ sal_uInt8* buffer = mBuffer.get();
+ for (size_t i = 0; i < allocate; i++)
+ buffer[i] = (i & 0xFF);
+ memcpy(buffer + allocate - sizeof(CANARY), CANARY, sizeof(CANARY));
+#endif
+}
+
+bool SkiaSalBitmap::Create(const SalBitmap& rSalBmp)
+{
+ return Create(rSalBmp, vcl::bitDepthToPixelFormat(rSalBmp.GetBitCount()));
+}
+
+bool SkiaSalBitmap::Create(const SalBitmap& rSalBmp, SalGraphics* pGraphics)
+{
+ auto ePixelFormat = vcl::PixelFormat::INVALID;
+ if (pGraphics)
+ ePixelFormat = vcl::bitDepthToPixelFormat(pGraphics->GetBitCount());
+ else
+ ePixelFormat = vcl::bitDepthToPixelFormat(rSalBmp.GetBitCount());
+
+ return Create(rSalBmp, ePixelFormat);
+}
+
+bool SkiaSalBitmap::Create(const SalBitmap& rSalBmp, vcl::PixelFormat eNewPixelFormat)
+{
+ assert(mAnyAccessCount == 0);
+ assert(&rSalBmp != this);
+ ResetAllData();
+ const SkiaSalBitmap& src = static_cast<const SkiaSalBitmap&>(rSalBmp);
+ mImage = src.mImage;
+ mAlphaImage = src.mAlphaImage;
+ mBuffer = src.mBuffer;
+ mPalette = src.mPalette;
+ mBitCount = src.mBitCount;
+ mSize = src.mSize;
+ mPixelsSize = src.mPixelsSize;
+ mScanlineSize = src.mScanlineSize;
+ mScaleQuality = src.mScaleQuality;
+ mEraseColorSet = src.mEraseColorSet;
+ mEraseColor = src.mEraseColor;
+ if (vcl::pixelFormatBitCount(eNewPixelFormat) != src.GetBitCount())
+ {
+ // This appears to be unused(?). Implement this just in case, but be lazy
+ // about it and rely on EnsureBitmapData() doing the conversion from mImage
+ // if needed, even if that may need unnecessary to- and from- SkImage
+ // conversion.
+ ResetToSkImage(GetSkImage());
+ }
+ SAL_INFO("vcl.skia.trace", "create(" << this << "): (" << &src << ")");
+ return true;
+}
+
+bool SkiaSalBitmap::Create(const css::uno::Reference<css::rendering::XBitmapCanvas>&, Size&, bool)
+{
+ return false;
+}
+
+void SkiaSalBitmap::Destroy()
+{
+ SAL_INFO("vcl.skia.trace", "destroy(" << this << ")");
+#ifdef DBG_UTIL
+ assert(mWriteAccessCount == 0);
+#endif
+ assert(mAnyAccessCount == 0);
+ ResetAllData();
+}
+
+Size SkiaSalBitmap::GetSize() const { return mSize; }
+
+sal_uInt16 SkiaSalBitmap::GetBitCount() const { return mBitCount; }
+
+BitmapBuffer* SkiaSalBitmap::AcquireBuffer(BitmapAccessMode nMode)
+{
+ switch (nMode)
+ {
+ case BitmapAccessMode::Write:
+ EnsureBitmapUniqueData();
+ if (!mBuffer)
+ return nullptr;
+ assert(mPixelsSize == mSize);
+ assert(!mEraseColorSet);
+ break;
+ case BitmapAccessMode::Read:
+ EnsureBitmapData();
+ if (!mBuffer)
+ return nullptr;
+ assert(mPixelsSize == mSize);
+ assert(!mEraseColorSet);
+ break;
+ case BitmapAccessMode::Info:
+ break;
+ }
+#ifdef DBG_UTIL
+ // BitmapWriteAccess stores also a copy of the palette and it can
+ // be modified, so concurrent reading of it might result in inconsistencies.
+ assert(mWriteAccessCount == 0 || nMode == BitmapAccessMode::Write);
+#endif
+ BitmapBuffer* buffer = new BitmapBuffer;
+ buffer->mnWidth = mSize.Width();
+ buffer->mnHeight = mSize.Height();
+ buffer->mnBitCount = mBitCount;
+ buffer->maPalette = mPalette;
+ if (nMode != BitmapAccessMode::Info)
+ buffer->mpBits = mBuffer.get();
+ else
+ buffer->mpBits = nullptr;
+ if (mPixelsSize == mSize)
+ buffer->mnScanlineSize = mScanlineSize;
+ else
+ {
+ // The value of mScanlineSize is based on internal mPixelsSize, but the outside
+ // world cares about mSize, the size that the report as the size of the bitmap,
+ // regardless of any internal state. So report scanline size for that size.
+ Size savedPixelsSize = mPixelsSize;
+ mPixelsSize = mSize;
+ ComputeScanlineSize();
+ buffer->mnScanlineSize = mScanlineSize;
+ mPixelsSize = savedPixelsSize;
+ ComputeScanlineSize();
+ }
+ switch (mBitCount)
+ {
+ case 1:
+ buffer->mnFormat = ScanlineFormat::N1BitMsbPal;
+ break;
+ case 8:
+ buffer->mnFormat = ScanlineFormat::N8BitPal;
+ break;
+ case 24:
+ // Make the RGB/BGR format match the default Skia 32bpp format, to allow
+ // easy conversion later.
+ buffer->mnFormat = kN32_SkColorTypeIsBGRA ? ScanlineFormat::N24BitTcBgr
+ : ScanlineFormat::N24BitTcRgb;
+ break;
+ case 32:
+ buffer->mnFormat = kN32_SkColorTypeIsBGRA ? ScanlineFormat::N32BitTcBgra
+ : ScanlineFormat::N32BitTcRgba;
+ break;
+ default:
+ abort();
+ }
+ buffer->mnFormat |= ScanlineFormat::TopDown;
+ ++mAnyAccessCount;
+#ifdef DBG_UTIL
+ if (nMode == BitmapAccessMode::Write)
+ ++mWriteAccessCount;
+#endif
+ return buffer;
+}
+
+void SkiaSalBitmap::ReleaseBuffer(BitmapBuffer* pBuffer, BitmapAccessMode nMode)
+{
+ ReleaseBuffer(pBuffer, nMode, false);
+}
+
+void SkiaSalBitmap::ReleaseBuffer(BitmapBuffer* pBuffer, BitmapAccessMode nMode,
+ bool dontChangeToErase)
+{
+ if (nMode == BitmapAccessMode::Write)
+ {
+#ifdef DBG_UTIL
+ assert(mWriteAccessCount > 0);
+ --mWriteAccessCount;
+#endif
+ mPalette = pBuffer->maPalette;
+ ResetToBuffer();
+ DataChanged();
+ }
+ assert(mAnyAccessCount > 0);
+ --mAnyAccessCount;
+ // Are there any more ground movements underneath us ?
+ assert(pBuffer->mnWidth == mSize.Width());
+ assert(pBuffer->mnHeight == mSize.Height());
+ assert(pBuffer->mnBitCount == mBitCount);
+ assert(pBuffer->mpBits == mBuffer.get() || nMode == BitmapAccessMode::Info);
+ verify();
+ delete pBuffer;
+ if (nMode == BitmapAccessMode::Write && !dontChangeToErase)
+ {
+ // This saves memory and is also used by IsFullyOpaqueAsAlpha() to avoid unnecessary
+ // alpha blending.
+ if (IsAllBlack())
+ {
+ SAL_INFO("vcl.skia.trace", "releasebuffer(" << this << "): erasing to black");
+ EraseInternal(COL_BLACK);
+ }
+ }
+}
+
+static bool isAllZero(const sal_uInt8* data, size_t size)
+{ // For performance, check in larger data chunks.
+#ifdef UINT64_MAX
+ const int64_t* d = reinterpret_cast<const int64_t*>(data);
+#else
+ const int32_t* d = reinterpret_cast<const int32_t*>(data);
+#endif
+ constexpr size_t step = sizeof(*d) * 8;
+ for (size_t i = 0; i < size / step; ++i)
+ { // Unrolled loop.
+ if (d[0] != 0)
+ return false;
+ if (d[1] != 0)
+ return false;
+ if (d[2] != 0)
+ return false;
+ if (d[3] != 0)
+ return false;
+ if (d[4] != 0)
+ return false;
+ if (d[5] != 0)
+ return false;
+ if (d[6] != 0)
+ return false;
+ if (d[7] != 0)
+ return false;
+ d += 8;
+ }
+ for (size_t i = size / step * step; i < size; ++i)
+ if (data[i] != 0)
+ return false;
+ return true;
+}
+
+bool SkiaSalBitmap::IsAllBlack() const
+{
+ if (mBitCount % 8 != 0 || (!!mPalette && mPalette[0] != COL_BLACK))
+ return false; // Don't bother.
+ if (mSize.Width() * mBitCount / 8 == mScanlineSize)
+ return isAllZero(mBuffer.get(), mScanlineSize * mSize.Height());
+ for (tools::Long y = 0; y < mSize.Height(); ++y)
+ if (!isAllZero(mBuffer.get() + mScanlineSize * y, mSize.Width() * mBitCount / 8))
+ return false;
+ return true;
+}
+
+bool SkiaSalBitmap::GetSystemData(BitmapSystemData&)
+{
+#ifdef DBG_UTIL
+ assert(mWriteAccessCount == 0);
+#endif
+ return false;
+}
+
+bool SkiaSalBitmap::ScalingSupported() const { return true; }
+
+bool SkiaSalBitmap::Scale(const double& rScaleX, const double& rScaleY, BmpScaleFlag nScaleFlag)
+{
+ SkiaZone zone;
+#ifdef DBG_UTIL
+ assert(mWriteAccessCount == 0);
+#endif
+ Size newSize(FRound(mSize.Width() * rScaleX), FRound(mSize.Height() * rScaleY));
+ if (mSize == newSize)
+ return true;
+
+ SAL_INFO("vcl.skia.trace", "scale(" << this << "): " << mSize << "/" << mBitCount << "->"
+ << newSize << ":" << static_cast<int>(nScaleFlag));
+
+ if (mEraseColorSet)
+ { // Simple.
+ mSize = newSize;
+ ResetPendingScaling();
+ EraseInternal(mEraseColor);
+ return true;
+ }
+
+ if (mBitCount < 24 && !mPalette.IsGreyPalette8Bit())
+ {
+ // Scaling can introduce additional colors not present in the original
+ // bitmap (e.g. when smoothing). If the bitmap is indexed (has non-trivial palette),
+ // this would break the bitmap, because the actual scaling is done only somewhen later.
+ // Linear 8bit palette (grey) is ok, since there we use directly the values as colors.
+ SAL_INFO("vcl.skia.trace", "scale(" << this << "): indexed bitmap");
+ return false;
+ }
+ // The idea here is that the actual scaling will be delayed until the result
+ // is actually needed. Usually the scaled bitmap will be drawn somewhere,
+ // so delaying will mean the scaling can be done as a part of GetSkImage().
+ // That means it can be GPU-accelerated, while done here directly it would need
+ // to be either done by CPU, or with the CPU->GPU->CPU roundtrip required
+ // by GPU-accelerated scaling.
+ // Pending scaling is detected by 'mSize != mPixelsSize' for mBuffer,
+ // and 'imageSize(mImage) != mSize' for mImage. It is not intended to have 3 different
+ // sizes though, code below keeps only mBuffer or mImage. Note that imageSize(mImage)
+ // may or may not be equal to mPixelsSize, depending on whether mImage is set here
+ // (sizes will be equal) or whether it's set in GetSkImage() (will not be equal).
+ // Pending scaling is considered "done" by the time mBuffer is resized (or created).
+ // Resizing of mImage is somewhat independent of this, since mImage is primarily
+ // considered to be a cached object (although sometimes it's the only data available).
+
+ // If there is already one scale() pending, use the lowest quality of all requested.
+ switch (nScaleFlag)
+ {
+ case BmpScaleFlag::Fast:
+ mScaleQuality = nScaleFlag;
+ break;
+ case BmpScaleFlag::NearestNeighbor:
+ // We handle this the same way as Fast by mapping to Skia's nearest-neighbor,
+ // and it's needed for unittests (mScaling and testTdf132367()).
+ mScaleQuality = nScaleFlag;
+ break;
+ case BmpScaleFlag::Default:
+ if (mScaleQuality == BmpScaleFlag::BestQuality)
+ mScaleQuality = nScaleFlag;
+ break;
+ case BmpScaleFlag::BestQuality:
+ // Best is the maximum, set by default.
+ break;
+ default:
+ SAL_INFO("vcl.skia.trace", "scale(" << this << "): unsupported scale algorithm");
+ return false;
+ }
+ mSize = newSize;
+ // If we have both mBuffer and mImage, prefer mImage, since it likely will be drawn later.
+ // We could possibly try to keep the buffer as well, but that would complicate things
+ // with two different data structures to be scaled on-demand, and it's a question
+ // if that'd realistically help with anything.
+ if (mImage)
+ ResetToSkImage(mImage);
+ else
+ ResetToBuffer();
+ DataChanged();
+ // The rest will be handled when the scaled bitmap is actually needed,
+ // such as in EnsureBitmapData() or GetSkImage().
+ return true;
+}
+
+bool SkiaSalBitmap::Replace(const Color&, const Color&, sal_uInt8)
+{
+#ifdef DBG_UTIL
+ assert(mWriteAccessCount == 0);
+#endif
+ return false;
+}
+
+bool SkiaSalBitmap::ConvertToGreyscale()
+{
+#ifdef DBG_UTIL
+ assert(mWriteAccessCount == 0);
+#endif
+ // Normally this would need to convert contents of mBuffer for all possible formats,
+ // so just let the VCL algorithm do it.
+ // Avoid the costly SkImage->buffer->SkImage conversion.
+ if (!mBuffer && mImage && !mEraseColorSet)
+ {
+ if (mBitCount == 8 && mPalette.IsGreyPalette8Bit())
+ return true;
+ sk_sp<SkSurface> surface
+ = createSkSurface(imageSize(mImage), mImage->imageInfo().alphaType());
+ SkPaint paint;
+ paint.setBlendMode(SkBlendMode::kSrc); // set as is, including alpha
+ // VCL uses different coefficients for conversion to gray than Skia, so use the VCL
+ // values from Bitmap::ImplMakeGreyscales(). Do not use kGray_8_SkColorType,
+ // Skia would use its gray conversion formula.
+ // NOTE: The matrix is 4x5 organized as columns (i.e. each line is a column, not a row).
+ constexpr SkColorMatrix toGray(77 / 256.0, 151 / 256.0, 28 / 256.0, 0, 0, // R column
+ 77 / 256.0, 151 / 256.0, 28 / 256.0, 0, 0, // G column
+ 77 / 256.0, 151 / 256.0, 28 / 256.0, 0, 0, // B column
+ 0, 0, 0, 1, 0); // don't modify alpha
+ paint.setColorFilter(SkColorFilters::Matrix(toGray));
+ surface->getCanvas()->drawImage(mImage, 0, 0, SkSamplingOptions(), &paint);
+ mBitCount = 8;
+ ComputeScanlineSize();
+ mPalette = Bitmap::GetGreyPalette(256);
+ ResetToSkImage(makeCheckedImageSnapshot(surface));
+ DataChanged();
+ SAL_INFO("vcl.skia.trace", "converttogreyscale(" << this << ")");
+ return true;
+ }
+ return false;
+}
+
+bool SkiaSalBitmap::InterpretAs8Bit()
+{
+#ifdef DBG_UTIL
+ assert(mWriteAccessCount == 0);
+#endif
+ if (mBitCount == 8 && mPalette.IsGreyPalette8Bit())
+ return true;
+ if (mEraseColorSet)
+ {
+ mBitCount = 8;
+ ComputeScanlineSize();
+ mPalette = Bitmap::GetGreyPalette(256);
+ EraseInternal(mEraseColor);
+ SAL_INFO("vcl.skia.trace", "interpretas8bit(" << this << ") with erase color");
+ return true;
+ }
+ // This is usually used by AlphaMask, the point is just to treat
+ // the content as an alpha channel. This is often used
+ // by the horrible separate-alpha-outdev hack, where the bitmap comes
+ // from SkiaSalGraphicsImpl::GetBitmap(), so only mImage is set,
+ // and that is followed by a later call to GetAlphaSkImage().
+ // Avoid the costly SkImage->buffer->SkImage conversion and simply
+ // just treat the SkImage as being for 8bit bitmap. EnsureBitmapData()
+ // will do the conversion if needed, but the normal case will be
+ // GetAlphaSkImage() creating kAlpha_8_SkColorType SkImage from it.
+ if (mImage)
+ {
+ mBitCount = 8;
+ ComputeScanlineSize();
+ mPalette = Bitmap::GetGreyPalette(256);
+ ResetToSkImage(mImage); // keep mImage, it will be interpreted as 8bit if needed
+ DataChanged();
+ SAL_INFO("vcl.skia.trace", "interpretas8bit(" << this << ") with image");
+ return true;
+ }
+ SAL_INFO("vcl.skia.trace", "interpretas8bit(" << this << ") with pixel data, ignoring");
+ return false;
+}
+
+bool SkiaSalBitmap::Erase(const Color& color)
+{
+#ifdef DBG_UTIL
+ assert(mWriteAccessCount == 0);
+#endif
+ // Optimized variant, just remember the color and apply it when needed,
+ // which may save having to do format conversions (e.g. GetSkImage()
+ // may directly erase the SkImage).
+ EraseInternal(color);
+ SAL_INFO("vcl.skia.trace", "erase(" << this << ")");
+ return true;
+}
+
+void SkiaSalBitmap::EraseInternal(const Color& color)
+{
+ ResetAllData();
+ mEraseColorSet = true;
+ mEraseColor = color;
+}
+
+bool SkiaSalBitmap::AlphaBlendWith(const SalBitmap& rSalBmp)
+{
+#ifdef DBG_UTIL
+ assert(mWriteAccessCount == 0);
+#endif
+ const SkiaSalBitmap* otherBitmap = dynamic_cast<const SkiaSalBitmap*>(&rSalBmp);
+ if (!otherBitmap)
+ return false;
+ if (mSize != otherBitmap->mSize)
+ return false;
+ // We're called from AlphaMask, which should ensure 8bit.
+ assert(GetBitCount() == 8 && mPalette.IsGreyPalette8Bit());
+ // If neither bitmap have Skia images, then AlphaMask::BlendWith() will be faster,
+ // as it will operate on mBuffer pixel buffers, while for Skia we'd need to convert it.
+ // If one has and one doesn't, do it using Skia, under the assumption that after this
+ // the resulting Skia image will be needed for drawing.
+ if (!(mImage || mEraseColorSet) && !(otherBitmap->mImage || otherBitmap->mEraseColorSet))
+ return false;
+ // This is for AlphaMask, which actually stores the alpha as the pixel values.
+ // I.e. take value of the color channel (one of them, if >8bit, they should be the same).
+ if (mEraseColorSet && otherBitmap->mEraseColorSet)
+ {
+ const sal_uInt16 nGrey1 = mEraseColor.GetRed();
+ const sal_uInt16 nGrey2 = otherBitmap->mEraseColor.GetRed();
+ const sal_uInt8 nGrey = static_cast<sal_uInt8>(nGrey1 + nGrey2 - nGrey1 * nGrey2 / 255);
+ mEraseColor = Color(nGrey, nGrey, nGrey);
+ DataChanged();
+ SAL_INFO("vcl.skia.trace",
+ "alphablendwith(" << this << ") : with erase color " << otherBitmap);
+ return true;
+ }
+ std::unique_ptr<SkiaSalBitmap> otherBitmapAllocated;
+ if (otherBitmap->GetBitCount() != 8 || !otherBitmap->mPalette.IsGreyPalette8Bit())
+ { // Convert/interpret as 8bit if needed.
+ otherBitmapAllocated = std::make_unique<SkiaSalBitmap>();
+ if (!otherBitmapAllocated->Create(*otherBitmap) || !otherBitmapAllocated->InterpretAs8Bit())
+ return false;
+ otherBitmap = otherBitmapAllocated.get();
+ }
+ // This is 8-bit bitmap serving as mask, so the image itself needs no alpha.
+ sk_sp<SkSurface> surface = createSkSurface(mSize, kOpaque_SkAlphaType);
+ SkPaint paint;
+ paint.setBlendMode(SkBlendMode::kSrc); // set as is
+ surface->getCanvas()->drawImage(GetSkImage(), 0, 0, SkSamplingOptions(), &paint);
+ paint.setBlendMode(SkBlendMode::kScreen); // src+dest - src*dest/255 (in 0..1)
+ surface->getCanvas()->drawImage(otherBitmap->GetSkImage(), 0, 0, SkSamplingOptions(), &paint);
+ ResetToSkImage(makeCheckedImageSnapshot(surface));
+ DataChanged();
+ SAL_INFO("vcl.skia.trace", "alphablendwith(" << this << ") : with image " << otherBitmap);
+ return true;
+}
+
+SkBitmap SkiaSalBitmap::GetAsSkBitmap() const
+{
+#ifdef DBG_UTIL
+ assert(mWriteAccessCount == 0);
+#endif
+ EnsureBitmapData();
+ assert(mSize == mPixelsSize); // data has already been scaled if needed
+ SkiaZone zone;
+ SkBitmap bitmap;
+ if (mBuffer)
+ {
+ if (mBitCount == 32)
+ {
+ // Make a copy, the bitmap should be immutable (otherwise converting it
+ // to SkImage will make a copy anyway).
+ const size_t bytes = mPixelsSize.Height() * mScanlineSize;
+ std::unique_ptr<sal_uInt8[]> data(new sal_uInt8[bytes]);
+ memcpy(data.get(), mBuffer.get(), bytes);
+ if (!bitmap.installPixels(
+ SkImageInfo::MakeS32(mPixelsSize.Width(), mPixelsSize.Height(), alphaType()),
+ data.release(), mScanlineSize,
+ [](void* addr, void*) { delete[] static_cast<sal_uInt8*>(addr); }, nullptr))
+ abort();
+ }
+ else if (mBitCount == 24)
+ {
+ // Convert 24bpp RGB/BGR to 32bpp RGBA/BGRA.
+ std::unique_ptr<uint32_t[]> data(
+ new uint32_t[mPixelsSize.Height() * mPixelsSize.Width()]);
+ uint32_t* dest = data.get();
+ // SkConvertRGBToRGBA() also works as BGR to BGRA (the function extends 3 bytes to 4
+ // by adding 0xFF alpha, so position of B and R doesn't matter).
+ if (mPixelsSize.Width() * 3 == mScanlineSize)
+ SkConvertRGBToRGBA(dest, mBuffer.get(), mPixelsSize.Height() * mPixelsSize.Width());
+ else
+ {
+ for (tools::Long y = 0; y < mPixelsSize.Height(); ++y)
+ {
+ const sal_uInt8* src = mBuffer.get() + mScanlineSize * y;
+ SkConvertRGBToRGBA(dest, src, mPixelsSize.Width());
+ dest += mPixelsSize.Width();
+ }
+ }
+ if (!bitmap.installPixels(
+ SkImageInfo::MakeS32(mPixelsSize.Width(), mPixelsSize.Height(),
+ kOpaque_SkAlphaType),
+ data.release(), mPixelsSize.Width() * 4,
+ [](void* addr, void*) { delete[] static_cast<sal_uInt8*>(addr); }, nullptr))
+ abort();
+ }
+ else if (mBitCount == 8 && mPalette.IsGreyPalette8Bit())
+ {
+ // Convert 8bpp gray to 32bpp RGBA/BGRA.
+ // There's also kGray_8_SkColorType, but it's probably simpler to make
+ // GetAsSkBitmap() always return 32bpp SkBitmap and then assume mImage
+ // is always 32bpp too.
+ std::unique_ptr<uint32_t[]> data(
+ new uint32_t[mPixelsSize.Height() * mPixelsSize.Width()]);
+ uint32_t* dest = data.get();
+ if (mPixelsSize.Width() * 1 == mScanlineSize)
+ SkConvertGrayToRGBA(dest, mBuffer.get(),
+ mPixelsSize.Height() * mPixelsSize.Width());
+ else
+ {
+ for (tools::Long y = 0; y < mPixelsSize.Height(); ++y)
+ {
+ const sal_uInt8* src = mBuffer.get() + mScanlineSize * y;
+ SkConvertGrayToRGBA(dest, src, mPixelsSize.Width());
+ dest += mPixelsSize.Width();
+ }
+ }
+ if (!bitmap.installPixels(
+ SkImageInfo::MakeS32(mPixelsSize.Width(), mPixelsSize.Height(),
+ kOpaque_SkAlphaType),
+ data.release(), mPixelsSize.Width() * 4,
+ [](void* addr, void*) { delete[] static_cast<sal_uInt8*>(addr); }, nullptr))
+ abort();
+ }
+ else
+ {
+ std::unique_ptr<sal_uInt8[]> data = convertDataBitCount(
+ mBuffer.get(), mPixelsSize.Width(), mPixelsSize.Height(), mBitCount, mScanlineSize,
+ mPalette, kN32_SkColorTypeIsBGRA ? BitConvert::BGRA : BitConvert::RGBA);
+ if (!bitmap.installPixels(
+ SkImageInfo::MakeS32(mPixelsSize.Width(), mPixelsSize.Height(),
+ kOpaque_SkAlphaType),
+ data.release(), mPixelsSize.Width() * 4,
+ [](void* addr, void*) { delete[] static_cast<sal_uInt8*>(addr); }, nullptr))
+ abort();
+ }
+ }
+ bitmap.setImmutable();
+ return bitmap;
+}
+
+// If mEraseColor is set, this is the color to use when the bitmap is used as alpha bitmap.
+// E.g. COL_BLACK actually means fully opaque and COL_WHITE means fully transparent.
+// This is because the alpha value is set as the color itself, not the alpha of the color.
+// Additionally VCL actually uses transparency and not opacity, so we should use "255 - value",
+// but we account for this by doing SkBlendMode::kDstOut when using alpha images (which
+// basically does another "255 - alpha"), so do not do it here.
+static SkColor fromEraseColorToAlphaImageColor(Color color)
+{
+ return SkColorSetARGB(color.GetBlue(), 0, 0, 0);
+}
+
+// SkiaSalBitmap can store data in both the SkImage and our mBuffer, which with large
+// images can waste quite a lot of memory. Ideally we should store the data in Skia's
+// SkBitmap, but LO wants us to support data formats that Skia doesn't support.
+// So try to conserve memory by keeping the data only once in that was the most
+// recently wanted storage, and drop the other one. Usually the other one won't be needed
+// for a long time, and especially with raster the conversion is usually fast.
+// Do this only with raster, to avoid GPU->CPU transfer in GPU mode (exception is 32bit
+// builds, where memory is more important). Also don't do this with paletted bitmaps,
+// where EnsureBitmapData() would be expensive.
+// Ideally SalBitmap should be able to say which bitmap formats it supports
+// and VCL code should oblige, which would allow reusing the same data.
+bool SkiaSalBitmap::ConserveMemory() const
+{
+ static bool keepBitmapBuffer = getenv("SAL_SKIA_KEEP_BITMAP_BUFFER") != nullptr;
+ constexpr bool is32Bit = sizeof(void*) == 4;
+ // 16MiB bitmap data at least (set to 0 for easy testing).
+ constexpr tools::Long maxBufferSize = 2000 * 2000 * 4;
+ return !keepBitmapBuffer && (renderMethodToUse() == RenderRaster || is32Bit)
+ && mPixelsSize.Height() * mScanlineSize > maxBufferSize
+ && (mBitCount > 8 || (mBitCount == 8 && mPalette.IsGreyPalette8Bit()));
+}
+
+const sk_sp<SkImage>& SkiaSalBitmap::GetSkImage(DirectImage direct) const
+{
+#ifdef DBG_UTIL
+ assert(mWriteAccessCount == 0);
+#endif
+ if (direct == DirectImage::Yes)
+ return mImage;
+ if (mEraseColorSet)
+ {
+ if (mImage)
+ {
+ assert(imageSize(mImage) == mSize);
+ return mImage;
+ }
+ SkiaZone zone;
+ sk_sp<SkSurface> surface = createSkSurface(
+ mSize, mEraseColor.IsTransparent() ? kPremul_SkAlphaType : kOpaque_SkAlphaType);
+ assert(surface);
+ surface->getCanvas()->clear(toSkColor(mEraseColor));
+ SkiaSalBitmap* thisPtr = const_cast<SkiaSalBitmap*>(this);
+ thisPtr->mImage = makeCheckedImageSnapshot(surface);
+ SAL_INFO("vcl.skia.trace", "getskimage(" << this << ") from erase color " << mEraseColor);
+ return mImage;
+ }
+ if (mPixelsSize != mSize && !mImage && renderMethodToUse() != RenderRaster)
+ {
+ // The bitmap has a pending scaling, but no image. This function would below call GetAsSkBitmap(),
+ // which would do CPU-based pixel scaling, and then it would get converted to an image.
+ // Be more efficient, first convert to an image and then the block below will scale on the GPU.
+ SAL_INFO("vcl.skia.trace", "getskimage(" << this << "): shortcut image scaling "
+ << mPixelsSize << "->" << mSize);
+ SkiaSalBitmap* thisPtr = const_cast<SkiaSalBitmap*>(this);
+ Size savedSize = mSize;
+ thisPtr->mSize = mPixelsSize; // block scaling
+ SkiaZone zone;
+ sk_sp<SkImage> image = createSkImage(GetAsSkBitmap());
+ assert(image);
+ thisPtr->mSize = savedSize;
+ thisPtr->ResetToSkImage(image);
+ }
+ if (mImage)
+ {
+ if (imageSize(mImage) != mSize)
+ {
+ assert(!mBuffer); // This code should be only called if only mImage holds data.
+ SkiaZone zone;
+ sk_sp<SkSurface> surface = createSkSurface(mSize, mImage->imageInfo().alphaType());
+ assert(surface);
+ SkPaint paint;
+ paint.setBlendMode(SkBlendMode::kSrc); // set as is, including alpha
+ surface->getCanvas()->drawImageRect(
+ mImage, SkRect::MakeWH(mSize.Width(), mSize.Height()),
+ makeSamplingOptions(mScaleQuality, imageSize(mImage), mSize, 1), &paint);
+ SAL_INFO("vcl.skia.trace", "getskimage(" << this << "): image scaled "
+ << Size(mImage->width(), mImage->height())
+ << "->" << mSize << ":"
+ << static_cast<int>(mScaleQuality));
+ SkiaSalBitmap* thisPtr = const_cast<SkiaSalBitmap*>(this);
+ thisPtr->mImage = makeCheckedImageSnapshot(surface);
+ }
+ return mImage;
+ }
+ SkiaZone zone;
+ sk_sp<SkImage> image = createSkImage(GetAsSkBitmap());
+ assert(image);
+ SkiaSalBitmap* thisPtr = const_cast<SkiaSalBitmap*>(this);
+ thisPtr->mImage = image;
+ // The data is now stored both in the SkImage and in our mBuffer, so drop the buffer
+ // if conserving memory. It'll be converted back by EnsureBitmapData() if needed.
+ if (ConserveMemory() && mAnyAccessCount == 0)
+ {
+ SAL_INFO("vcl.skia.trace", "getskimage(" << this << "): dropping buffer");
+ thisPtr->ResetToSkImage(mImage);
+ }
+ SAL_INFO("vcl.skia.trace", "getskimage(" << this << ")");
+ return mImage;
+}
+
+const sk_sp<SkImage>& SkiaSalBitmap::GetAlphaSkImage(DirectImage direct) const
+{
+#ifdef DBG_UTIL
+ assert(mWriteAccessCount == 0);
+#endif
+ if (direct == DirectImage::Yes)
+ return mAlphaImage;
+ if (mEraseColorSet)
+ {
+ if (mAlphaImage)
+ {
+ assert(imageSize(mAlphaImage) == mSize);
+ return mAlphaImage;
+ }
+ SkiaZone zone;
+ sk_sp<SkSurface> surface = createSkSurface(mSize, kAlpha_8_SkColorType);
+ assert(surface);
+ surface->getCanvas()->clear(fromEraseColorToAlphaImageColor(mEraseColor));
+ SkiaSalBitmap* thisPtr = const_cast<SkiaSalBitmap*>(this);
+ thisPtr->mAlphaImage = makeCheckedImageSnapshot(surface);
+ SAL_INFO("vcl.skia.trace",
+ "getalphaskimage(" << this << ") from erase color " << mEraseColor);
+ return mAlphaImage;
+ }
+ if (mAlphaImage)
+ {
+ if (imageSize(mAlphaImage) == mSize)
+ return mAlphaImage;
+ }
+ if (mImage)
+ {
+ SkiaZone zone;
+ const bool scaling = imageSize(mImage) != mSize;
+ SkPixmap pixmap;
+ // Note: We cannot do this when 'scaling' because SkCanvas::drawImageRect()
+ // with kAlpha_8_SkColorType as source and destination would act as SkBlendMode::kSrcOver
+ // despite SkBlendMode::kSrc set (https://bugs.chromium.org/p/skia/issues/detail?id=9692).
+ if (mImage->peekPixels(&pixmap) && !scaling)
+ {
+ assert(pixmap.colorType() == kN32_SkColorType);
+ // In non-GPU mode, convert 32bit data to 8bit alpha, this is faster than
+ // the SkColorFilter below. Since this is the VCL alpha-vdev alpha, where
+ // all R,G,B are the same and in fact mean alpha, this means we simply take one
+ // 8bit channel from the input, and that's the output.
+ SkBitmap bitmap;
+ if (!bitmap.installPixels(pixmap))
+ abort();
+ SkBitmap alphaBitmap;
+ if (!alphaBitmap.tryAllocPixels(SkImageInfo::MakeA8(bitmap.width(), bitmap.height())))
+ abort();
+ if (int(bitmap.rowBytes()) == bitmap.width() * 4)
+ {
+ SkConvertRGBAToR(alphaBitmap.getAddr8(0, 0), bitmap.getAddr32(0, 0),
+ bitmap.width() * bitmap.height());
+ }
+ else
+ {
+ for (tools::Long y = 0; y < bitmap.height(); ++y)
+ SkConvertRGBAToR(alphaBitmap.getAddr8(0, y), bitmap.getAddr32(0, y),
+ bitmap.width());
+ }
+ alphaBitmap.setImmutable();
+ sk_sp<SkImage> alphaImage = createSkImage(alphaBitmap);
+ assert(alphaImage);
+ SAL_INFO("vcl.skia.trace", "getalphaskimage(" << this << ") from raster image");
+ // Don't bother here with ConserveMemory(), mImage -> mAlphaImage conversions should
+ // generally only happen with the separate-alpha-outdev hack, and those bitmaps should
+ // be temporary.
+ SkiaSalBitmap* thisPtr = const_cast<SkiaSalBitmap*>(this);
+ thisPtr->mAlphaImage = alphaImage;
+ return mAlphaImage;
+ }
+ // Move the R channel value to the alpha channel. This seems to be the only
+ // way to reinterpret data in SkImage as an alpha SkImage without accessing the pixels.
+ // NOTE: The matrix is 4x5 organized as columns (i.e. each line is a column, not a row).
+ constexpr SkColorMatrix redToAlpha(0, 0, 0, 0, 0, // R column
+ 0, 0, 0, 0, 0, // G column
+ 0, 0, 0, 0, 0, // B column
+ 1, 0, 0, 0, 0); // A column
+ SkPaint paint;
+ paint.setColorFilter(SkColorFilters::Matrix(redToAlpha));
+ if (scaling)
+ assert(!mBuffer); // This code should be only called if only mImage holds data.
+ sk_sp<SkSurface> surface = createSkSurface(mSize, kAlpha_8_SkColorType);
+ assert(surface);
+ paint.setBlendMode(SkBlendMode::kSrc); // set as is, including alpha
+ surface->getCanvas()->drawImageRect(
+ mImage, SkRect::MakeWH(mSize.Width(), mSize.Height()),
+ scaling ? makeSamplingOptions(mScaleQuality, imageSize(mImage), mSize, 1)
+ : SkSamplingOptions(),
+ &paint);
+ if (scaling)
+ SAL_INFO("vcl.skia.trace", "getalphaskimage(" << this << "): image scaled "
+ << Size(mImage->width(), mImage->height())
+ << "->" << mSize << ":"
+ << static_cast<int>(mScaleQuality));
+ else
+ SAL_INFO("vcl.skia.trace", "getalphaskimage(" << this << ") from image");
+ // Don't bother here with ConserveMemory(), mImage -> mAlphaImage conversions should
+ // generally only happen with the separate-alpha-outdev hack, and those bitmaps should
+ // be temporary.
+ SkiaSalBitmap* thisPtr = const_cast<SkiaSalBitmap*>(this);
+ thisPtr->mAlphaImage = makeCheckedImageSnapshot(surface);
+ return mAlphaImage;
+ }
+ SkiaZone zone;
+ EnsureBitmapData();
+ assert(mSize == mPixelsSize); // data has already been scaled if needed
+ SkBitmap alphaBitmap;
+ if (mBuffer && mBitCount <= 8)
+ {
+ assert(mBuffer.get());
+ verify();
+ std::unique_ptr<sal_uInt8[]> data
+ = convertDataBitCount(mBuffer.get(), mSize.Width(), mSize.Height(), mBitCount,
+ mScanlineSize, mPalette, BitConvert::A8);
+ if (!alphaBitmap.installPixels(
+ SkImageInfo::MakeA8(mSize.Width(), mSize.Height()), data.release(), mSize.Width(),
+ [](void* addr, void*) { delete[] static_cast<sal_uInt8*>(addr); }, nullptr))
+ abort();
+ alphaBitmap.setImmutable();
+ sk_sp<SkImage> image = createSkImage(alphaBitmap);
+ assert(image);
+ const_cast<sk_sp<SkImage>&>(mAlphaImage) = image;
+ }
+ else
+ {
+ sk_sp<SkSurface> surface = createSkSurface(mSize, kAlpha_8_SkColorType);
+ assert(surface);
+ SkPaint paint;
+ paint.setBlendMode(SkBlendMode::kSrc); // set as is, including alpha
+ // Move the R channel value to the alpha channel. This seems to be the only
+ // way to reinterpret data in SkImage as an alpha SkImage without accessing the pixels.
+ // NOTE: The matrix is 4x5 organized as columns (i.e. each line is a column, not a row).
+ constexpr SkColorMatrix redToAlpha(0, 0, 0, 0, 0, // R column
+ 0, 0, 0, 0, 0, // G column
+ 0, 0, 0, 0, 0, // B column
+ 1, 0, 0, 0, 0); // A column
+ paint.setColorFilter(SkColorFilters::Matrix(redToAlpha));
+ surface->getCanvas()->drawImage(GetAsSkBitmap().asImage(), 0, 0, SkSamplingOptions(),
+ &paint);
+ SkiaSalBitmap* thisPtr = const_cast<SkiaSalBitmap*>(this);
+ thisPtr->mAlphaImage = makeCheckedImageSnapshot(surface);
+ }
+ // The data is now stored both in the SkImage and in our mBuffer, so drop the buffer
+ // if conserving memory and the conversion back would be simple (it'll be converted back
+ // by EnsureBitmapData() if needed).
+ if (ConserveMemory() && mBitCount == 8 && mPalette.IsGreyPalette8Bit() && mAnyAccessCount == 0)
+ {
+ SAL_INFO("vcl.skia.trace", "getalphaskimage(" << this << "): dropping buffer");
+ SkiaSalBitmap* thisPtr = const_cast<SkiaSalBitmap*>(this);
+ thisPtr->mBuffer.reset();
+ }
+ SAL_INFO("vcl.skia.trace", "getalphaskimage(" << this << ")");
+ return mAlphaImage;
+}
+
+void SkiaSalBitmap::TryDirectConvertToAlphaNoScaling()
+{
+ // This is a bit of a hack. Because of the VCL alpha hack where alpha is stored
+ // separately, we often convert mImage to mAlphaImage to represent the alpha
+ // channel. If code finds out that there is mImage but no mAlphaImage,
+ // this will create it from it, without checking for delayed scaling (i.e.
+ // it is "direct").
+ assert(mImage);
+ assert(!mAlphaImage);
+ // Set wanted size, trigger conversion.
+ Size savedSize = mSize;
+ mSize = imageSize(mImage);
+ GetAlphaSkImage();
+ assert(mAlphaImage);
+ mSize = savedSize;
+}
+
+// If the bitmap is to be erased, SkShader with the color set is more efficient
+// than creating an image filled with the color.
+bool SkiaSalBitmap::PreferSkShader() const { return mEraseColorSet; }
+
+sk_sp<SkShader> SkiaSalBitmap::GetSkShader(const SkSamplingOptions& samplingOptions,
+ DirectImage direct) const
+{
+ if (mEraseColorSet)
+ return SkShaders::Color(toSkColor(mEraseColor));
+ return GetSkImage(direct)->makeShader(samplingOptions);
+}
+
+sk_sp<SkShader> SkiaSalBitmap::GetAlphaSkShader(const SkSamplingOptions& samplingOptions,
+ DirectImage direct) const
+{
+ if (mEraseColorSet)
+ return SkShaders::Color(fromEraseColorToAlphaImageColor(mEraseColor));
+ return GetAlphaSkImage(direct)->makeShader(samplingOptions);
+}
+
+bool SkiaSalBitmap::IsFullyOpaqueAsAlpha() const
+{
+ if (!mEraseColorSet) // Set from Erase() or ReleaseBuffer().
+ return false;
+ // If the erase color is set so that this bitmap used as alpha would
+ // mean a fully opaque alpha mask (= noop), we can skip using it.
+ // Note that for alpha bitmaps we use the VCL "transparency" convention,
+ // i.e. alpha 0 is opaque.
+ return SkColorGetA(fromEraseColorToAlphaImageColor(mEraseColor)) == 0;
+}
+
+SkAlphaType SkiaSalBitmap::alphaType() const
+{
+ if (mEraseColorSet)
+ return mEraseColor.IsTransparent() ? kPremul_SkAlphaType : kOpaque_SkAlphaType;
+#if SKIA_USE_BITMAP32
+ // The bitmap's alpha matters only if SKIA_USE_BITMAP32 is set, otherwise
+ // the alpha is in a separate bitmap.
+ if (mBitCount == 32)
+ return kPremul_SkAlphaType;
+#endif
+ return kOpaque_SkAlphaType;
+}
+
+void SkiaSalBitmap::PerformErase()
+{
+ if (mPixelsSize.IsEmpty())
+ return;
+ BitmapBuffer* bitmapBuffer = AcquireBuffer(BitmapAccessMode::Write);
+ if (bitmapBuffer == nullptr)
+ abort();
+ Color fastColor = mEraseColor;
+ if (!!mPalette)
+ fastColor = Color(ColorTransparency, mPalette.GetBestIndex(fastColor));
+ if (!ImplFastEraseBitmap(*bitmapBuffer, fastColor))
+ {
+ FncSetPixel setPixel = BitmapReadAccess::SetPixelFunction(bitmapBuffer->mnFormat);
+ assert(bitmapBuffer->mnFormat & ScanlineFormat::TopDown);
+ // Set first scanline, copy to others.
+ Scanline scanline = bitmapBuffer->mpBits;
+ for (tools::Long x = 0; x < bitmapBuffer->mnWidth; ++x)
+ setPixel(scanline, x, mEraseColor, bitmapBuffer->maColorMask);
+ for (tools::Long y = 1; y < bitmapBuffer->mnHeight; ++y)
+ memcpy(scanline + y * bitmapBuffer->mnScanlineSize, scanline,
+ bitmapBuffer->mnScanlineSize);
+ }
+ ReleaseBuffer(bitmapBuffer, BitmapAccessMode::Write, true);
+}
+
+void SkiaSalBitmap::EnsureBitmapData()
+{
+ if (mEraseColorSet)
+ {
+ SkiaZone zone;
+ assert(mPixelsSize == mSize);
+ assert(!mBuffer);
+ CreateBitmapData();
+ // Unset now, so that repeated call will return mBuffer.
+ mEraseColorSet = false;
+ PerformErase();
+ verify();
+ SAL_INFO("vcl.skia.trace",
+ "ensurebitmapdata(" << this << ") from erase color " << mEraseColor);
+ return;
+ }
+
+ if (mBuffer)
+ {
+ if (mSize == mPixelsSize)
+ return;
+ // Pending scaling. Create raster SkImage from the bitmap data
+ // at the pixel size and then the code below will scale at the correct
+ // bpp from the image.
+ SAL_INFO("vcl.skia.trace", "ensurebitmapdata(" << this << "): pixels to be scaled "
+ << mPixelsSize << "->" << mSize << ":"
+ << static_cast<int>(mScaleQuality));
+ Size savedSize = mSize;
+ mSize = mPixelsSize;
+ ResetToSkImage(SkImage::MakeFromBitmap(GetAsSkBitmap()));
+ mSize = savedSize;
+ }
+
+ // Convert from alpha image, if the conversion is simple.
+ if (mAlphaImage && imageSize(mAlphaImage) == mSize && mBitCount == 8
+ && mPalette.IsGreyPalette8Bit())
+ {
+ assert(mAlphaImage->colorType() == kAlpha_8_SkColorType);
+ SkiaZone zone;
+ SkBitmap bitmap;
+ SkPixmap pixmap;
+ if (mAlphaImage->peekPixels(&pixmap))
+ bitmap.installPixels(pixmap);
+ else
+ {
+ if (!bitmap.tryAllocPixels(SkImageInfo::MakeA8(mSize.Width(), mSize.Height())))
+ abort();
+ SkCanvas canvas(bitmap);
+ SkPaint paint;
+ paint.setBlendMode(SkBlendMode::kSrc); // set as is, including alpha
+ canvas.drawImage(mAlphaImage, 0, 0, SkSamplingOptions(), &paint);
+ canvas.flush();
+ }
+ bitmap.setImmutable();
+ ResetPendingScaling();
+ CreateBitmapData();
+ assert(mBuffer != nullptr);
+ assert(mPixelsSize == mSize);
+ if (int(bitmap.rowBytes()) == mScanlineSize)
+ memcpy(mBuffer.get(), bitmap.getPixels(), mSize.Height() * mScanlineSize);
+ else
+ {
+ for (tools::Long y = 0; y < mSize.Height(); ++y)
+ {
+ const uint8_t* src = static_cast<uint8_t*>(bitmap.getAddr(0, y));
+ sal_uInt8* dest = mBuffer.get() + mScanlineSize * y;
+ memcpy(dest, src, mScanlineSize);
+ }
+ }
+ verify();
+ // We've created the bitmap data from mAlphaImage, drop the image if conserving memory,
+ // it'll be converted back if needed.
+ if (ConserveMemory())
+ {
+ SAL_INFO("vcl.skia.trace", "ensurebitmapdata(" << this << "): dropping images");
+ ResetToBuffer();
+ }
+ SAL_INFO("vcl.skia.trace", "ensurebitmapdata(" << this << "): from alpha image");
+ return;
+ }
+
+ if (!mImage)
+ {
+ // No data at all, create uninitialized data.
+ CreateBitmapData();
+ SAL_INFO("vcl.skia.trace", "ensurebitmapdata(" << this << "): uninitialized");
+ return;
+ }
+ // Try to fill mBuffer from mImage.
+ assert(mImage->colorType() == kN32_SkColorType);
+ SkiaZone zone;
+ // If the source image has no alpha, then use no alpha (faster to convert), otherwise
+ // use kUnpremul_SkAlphaType to make Skia convert from premultiplied alpha when reading
+ // from the SkImage (the alpha will be ignored if converting to bpp<32 formats, but
+ // the color channels must be unpremultiplied. Unless bpp==32 and SKIA_USE_BITMAP32,
+ // in which case use kPremul_SkAlphaType, since SKIA_USE_BITMAP32 implies premultiplied alpha.
+ SkAlphaType alphaType = kUnpremul_SkAlphaType;
+ if (mImage->imageInfo().alphaType() == kOpaque_SkAlphaType)
+ alphaType = kOpaque_SkAlphaType;
+#if SKIA_USE_BITMAP32
+ if (mBitCount == 32)
+ alphaType = kPremul_SkAlphaType;
+#endif
+ SkBitmap bitmap;
+ SkPixmap pixmap;
+ if (imageSize(mImage) == mSize && mImage->imageInfo().alphaType() == alphaType
+ && mImage->peekPixels(&pixmap))
+ {
+ bitmap.installPixels(pixmap);
+ }
+ else
+ {
+ if (!bitmap.tryAllocPixels(SkImageInfo::MakeS32(mSize.Width(), mSize.Height(), alphaType)))
+ abort();
+ SkCanvas canvas(bitmap);
+ SkPaint paint;
+ paint.setBlendMode(SkBlendMode::kSrc); // set as is, including alpha
+ if (imageSize(mImage) != mSize) // pending scaling?
+ {
+ canvas.drawImageRect(mImage, SkRect::MakeWH(mSize.getWidth(), mSize.getHeight()),
+ makeSamplingOptions(mScaleQuality, imageSize(mImage), mSize, 1),
+ &paint);
+ SAL_INFO("vcl.skia.trace",
+ "ensurebitmapdata(" << this << "): image scaled " << imageSize(mImage) << "->"
+ << mSize << ":" << static_cast<int>(mScaleQuality));
+ }
+ else
+ canvas.drawImage(mImage, 0, 0, SkSamplingOptions(), &paint);
+ canvas.flush();
+ }
+ bitmap.setImmutable();
+ ResetPendingScaling();
+ CreateBitmapData();
+ assert(mBuffer != nullptr);
+ assert(mPixelsSize == mSize);
+ if (mBitCount == 32)
+ {
+ if (int(bitmap.rowBytes()) == mScanlineSize)
+ memcpy(mBuffer.get(), bitmap.getPixels(), mSize.Height() * mScanlineSize);
+ else
+ {
+ for (tools::Long y = 0; y < mSize.Height(); ++y)
+ {
+ const uint8_t* src = static_cast<uint8_t*>(bitmap.getAddr(0, y));
+ sal_uInt8* dest = mBuffer.get() + mScanlineSize * y;
+ memcpy(dest, src, mScanlineSize);
+ }
+ }
+ }
+ else if (mBitCount == 24) // non-paletted
+ {
+ if (int(bitmap.rowBytes()) == mSize.Width() * 4 && mSize.Width() * 3 == mScanlineSize)
+ {
+ SkConvertRGBAToRGB(mBuffer.get(), bitmap.getAddr32(0, 0),
+ mSize.Height() * mSize.Width());
+ }
+ else
+ {
+ for (tools::Long y = 0; y < mSize.Height(); ++y)
+ {
+ const uint32_t* src = bitmap.getAddr32(0, y);
+ sal_uInt8* dest = mBuffer.get() + mScanlineSize * y;
+ SkConvertRGBAToRGB(dest, src, mSize.Width());
+ }
+ }
+ }
+ else if (mBitCount == 8 && mPalette.IsGreyPalette8Bit())
+ { // no actual data conversion, use one color channel as the gray value
+ if (int(bitmap.rowBytes()) == mSize.Width() * 4 && mSize.Width() * 1 == mScanlineSize)
+ {
+ SkConvertRGBAToR(mBuffer.get(), bitmap.getAddr32(0, 0), mSize.Height() * mSize.Width());
+ }
+ else
+ {
+ for (tools::Long y = 0; y < mSize.Height(); ++y)
+ {
+ const uint32_t* src = bitmap.getAddr32(0, y);
+ sal_uInt8* dest = mBuffer.get() + mScanlineSize * y;
+ SkConvertRGBAToR(dest, src, mSize.Width());
+ }
+ }
+ }
+ else
+ {
+ std::unique_ptr<vcl::ScanlineWriter> pWriter
+ = vcl::ScanlineWriter::Create(mBitCount, mPalette);
+ for (tools::Long y = 0; y < mSize.Height(); ++y)
+ {
+ const uint8_t* src = static_cast<uint8_t*>(bitmap.getAddr(0, y));
+ sal_uInt8* dest = mBuffer.get() + mScanlineSize * y;
+ pWriter->nextLine(dest);
+ for (tools::Long x = 0; x < mSize.Width(); ++x)
+ {
+ sal_uInt8 r = *src++;
+ sal_uInt8 g = *src++;
+ sal_uInt8 b = *src++;
+ ++src; // skip alpha
+ pWriter->writeRGB(r, g, b);
+ }
+ }
+ }
+ verify();
+ // We've created the bitmap data from mImage, drop the image if conserving memory,
+ // it'll be converted back if needed.
+ if (ConserveMemory())
+ {
+ SAL_INFO("vcl.skia.trace", "ensurebitmapdata(" << this << "): dropping images");
+ ResetToBuffer();
+ }
+ SAL_INFO("vcl.skia.trace", "ensurebitmapdata(" << this << ")");
+}
+
+void SkiaSalBitmap::EnsureBitmapUniqueData()
+{
+#ifdef DBG_UTIL
+ assert(mWriteAccessCount == 0);
+#endif
+ EnsureBitmapData();
+ assert(mPixelsSize == mSize);
+ if (mBuffer.use_count() > 1)
+ {
+ sal_uInt32 allocate = mScanlineSize * mSize.Height();
+#ifdef DBG_UTIL
+ assert(memcmp(mBuffer.get() + allocate, CANARY, sizeof(CANARY)) == 0);
+ allocate += sizeof(CANARY);
+#endif
+ boost::shared_ptr<sal_uInt8[]> newBuffer = boost::make_shared_noinit<sal_uInt8[]>(allocate);
+ memcpy(newBuffer.get(), mBuffer.get(), allocate);
+ mBuffer = newBuffer;
+ }
+}
+
+void SkiaSalBitmap::ResetToBuffer()
+{
+ SkiaZone zone;
+ // This should never be called to drop mImage if that's the only data we have.
+ assert(mBuffer || !mImage);
+ mImage.reset();
+ mAlphaImage.reset();
+ mEraseColorSet = false;
+}
+
+void SkiaSalBitmap::ResetToSkImage(sk_sp<SkImage> image)
+{
+ assert(mAnyAccessCount == 0); // can't reset mBuffer if there's a read access pointing to it
+ SkiaZone zone;
+ mBuffer.reset();
+ mImage = image;
+ mAlphaImage.reset();
+ mEraseColorSet = false;
+}
+
+void SkiaSalBitmap::ResetAllData()
+{
+ assert(mAnyAccessCount == 0);
+ SkiaZone zone;
+ mBuffer.reset();
+ mImage.reset();
+ mAlphaImage.reset();
+ mEraseColorSet = false;
+ mPixelsSize = mSize;
+ ComputeScanlineSize();
+ DataChanged();
+}
+
+void SkiaSalBitmap::DataChanged() { InvalidateChecksum(); }
+
+void SkiaSalBitmap::ResetPendingScaling()
+{
+ if (mPixelsSize == mSize)
+ return;
+ SkiaZone zone;
+ mScaleQuality = BmpScaleFlag::BestQuality;
+ mPixelsSize = mSize;
+ ComputeScanlineSize();
+ // Information about the pending scaling has been discarded, so make sure we do not
+ // keep around any cached images that would still need scaling.
+ if (mImage && imageSize(mImage) != mSize)
+ mImage.reset();
+ if (mAlphaImage && imageSize(mAlphaImage) != mSize)
+ mAlphaImage.reset();
+}
+
+OString SkiaSalBitmap::GetImageKey(DirectImage direct) const
+{
+ if (mEraseColorSet)
+ {
+ std::stringstream ss;
+ ss << std::hex << std::setfill('0') << std::setw(6)
+ << static_cast<sal_uInt32>(mEraseColor.GetRGBColor()) << std::setw(2)
+ << static_cast<int>(mEraseColor.GetAlpha());
+ return OString::Concat("E") + ss.str().c_str();
+ }
+ assert(direct == DirectImage::No || mImage);
+ sk_sp<SkImage> image = GetSkImage(direct);
+ // In some cases drawing code may try to draw the same content but using
+ // different bitmaps (even underlying bitmaps), for example canvas apparently
+ // copies the same things around in tdf#146095. For pixel-based images
+ // it should be still cheaper to compute a checksum and avoid re-caching.
+ if (!image->isTextureBacked())
+ return OString::Concat("C") + OString::number(getSkImageChecksum(image));
+ return OString::Concat("I") + OString::number(image->uniqueID());
+}
+
+OString SkiaSalBitmap::GetAlphaImageKey(DirectImage direct) const
+{
+ if (mEraseColorSet)
+ {
+ std::stringstream ss;
+ ss << std::hex << std::setfill('0') << std::setw(2)
+ << static_cast<int>(255 - SkColorGetA(fromEraseColorToAlphaImageColor(mEraseColor)));
+ return OString::Concat("E") + ss.str().c_str();
+ }
+ assert(direct == DirectImage::No || mAlphaImage);
+ sk_sp<SkImage> image = GetAlphaSkImage(direct);
+ if (!image->isTextureBacked())
+ return OString::Concat("C") + OString::number(getSkImageChecksum(image));
+ return OString::Concat("I") + OString::number(image->uniqueID());
+}
+
+void SkiaSalBitmap::dump(const char* file) const
+{
+ // Use a copy, so that debugging doesn't affect this instance.
+ SkiaSalBitmap copy;
+ copy.Create(*this);
+ SkiaHelper::dump(copy.GetSkImage(), file);
+}
+
+#ifdef DBG_UTIL
+void SkiaSalBitmap::verify() const
+{
+ if (!mBuffer)
+ return;
+ // Use mPixelsSize, that describes the size of the actual data.
+ assert(memcmp(mBuffer.get() + mScanlineSize * mPixelsSize.Height(), CANARY, sizeof(CANARY))
+ == 0);
+}
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */