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office-gobmx/vcl/skia/salbmp.cxx
Tomaž Vajngerl e992f5c53a vcl: use PixelFormat enum in SalBitmap interface and backends 
This changes all backends to use PixelFormat as the input to
the SalBitmap::Create method (and all the backends). This is the
first part as we need to make sure to also limit the use of
GetBitCount method and also use of it in SalGraphics.

Change-Id: I8d2b6adfcb8fe3dd78010538411f338c9a1c3996
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/113603
Tested-by: Jenkins
Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>
2021-04-06 08:40:35 +02:00

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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/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 <SkCanvas.h>
#include <SkImage.h>
#include <SkPixelRef.h>
#include <SkSurface.h>
#include <SkSwizzle.h>
#include <SkColorFilter.h>
#include <SkColorMatrix.h>
#include <skia_opts.hxx>
#include <skia/utils.hxx>
#include <skia/zone.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();
mBitCount = 32;
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);
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();
InvalidateChecksum();
}
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::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();
// 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));
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
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);
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();
}
sk_sp<SkSurface> surface = createSkSurface(mSize);
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));
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;
}
static SkColor toSkColor(Color color)
{
return SkColorSetARGB(color.GetAlpha(), color.GetRed(), color.GetGreen(), color.GetBlue());
}
// 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() const
{
#ifdef DBG_UTIL
assert(mWriteAccessCount == 0);
#endif
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), &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() const
{
#ifdef DBG_UTIL
assert(mWriteAccessCount == 0);
#endif
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)
{
assert(mSize == mPixelsSize); // data has already been scaled if needed
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) : 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;
}
// 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) const
{
if (mEraseColorSet)
return SkShaders::Color(toSkColor(mEraseColor));
return GetSkImage()->makeShader(samplingOptions);
}
sk_sp<SkShader> SkiaSalBitmap::GetAlphaSkShader(const SkSamplingOptions& samplingOptions) const
{
if (mEraseColorSet)
return SkShaders::Color(fromEraseColorToAlphaImageColor(mEraseColor));
return GetAlphaSkImage()->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), &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;
}
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() 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 OStringLiteral("E") + ss.str().c_str();
}
return OStringLiteral("I") + OString::number(GetSkImage()->uniqueID());
}
OString SkiaSalBitmap::GetAlphaImageKey() const
{
if (mEraseColorSet)
{
std::stringstream ss;
ss << std::hex << std::setfill('0') << std::setw(2)
<< static_cast<int>(SkColorGetA(fromEraseColorToAlphaImageColor(mEraseColor)));
return OStringLiteral("E") + ss.str().c_str();
}
return OStringLiteral("I") + OString::number(GetAlphaSkImage()->uniqueID());
}
#ifdef DBG_UTIL
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);
}
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: */
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