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| -rw-r--r-- | vcl/inc/skia/salbmp.hxx | 222 |
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diff --git a/vcl/inc/skia/salbmp.hxx b/vcl/inc/skia/salbmp.hxx new file mode 100644 index 000000000..05e489643 --- /dev/null +++ b/vcl/inc/skia/salbmp.hxx @@ -0,0 +1,222 @@ +/* -*- 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 . + */ + +#ifndef INCLUDED_VCL_INC_SKIA_SALBMP_H +#define INCLUDED_VCL_INC_SKIA_SALBMP_H + +#include <salbmp.hxx> +#include <vcl/bitmap.hxx> + +#include <boost/shared_ptr.hpp> + +#include <skia/utils.hxx> + +#include <SkImage.h> + +class VCL_PLUGIN_PUBLIC SkiaSalBitmap final : public SalBitmap +{ +public: + SkiaSalBitmap(); + SkiaSalBitmap(const sk_sp<SkImage>& image); + virtual ~SkiaSalBitmap() override; + + // SalBitmap methods + virtual bool Create(const Size& rSize, vcl::PixelFormat ePixelFormat, + const BitmapPalette& rPal) override; + virtual bool Create(const SalBitmap& rSalBmp) override; + virtual bool Create(const SalBitmap& rSalBmp, SalGraphics* pGraphics) override; + virtual bool Create(const SalBitmap& rSalBmp, vcl::PixelFormat eNewPixelFormat) override; + virtual bool Create(const css::uno::Reference<css::rendering::XBitmapCanvas>& rBitmapCanvas, + Size& rSize, bool bMask = false) override; + + virtual void Destroy() final override; + + virtual Size GetSize() const override; + virtual sal_uInt16 GetBitCount() const override; + + virtual BitmapBuffer* AcquireBuffer(BitmapAccessMode nMode) override; + virtual void ReleaseBuffer(BitmapBuffer* pBuffer, BitmapAccessMode nMode) override; + + virtual bool GetSystemData(BitmapSystemData& rData) override; + + virtual bool ScalingSupported() const override; + virtual bool Scale(const double& rScaleX, const double& rScaleY, + BmpScaleFlag nScaleFlag) override; + virtual bool Replace(const Color& rSearchColor, const Color& rReplaceColor, + sal_uInt8 nTol) override; + virtual bool InterpretAs8Bit() override; + virtual bool ConvertToGreyscale() override; + virtual bool Erase(const Color& color) override; + virtual bool AlphaBlendWith(const SalBitmap& rSalBmp) override; + + const BitmapPalette& Palette() const { return mPalette; } + + // True if GetSkShader() should be preferred to GetSkImage() (or the Alpha variants). + bool PreferSkShader() const; + + // Direct image means direct access to the stored SkImage, without checking + // if its size is up to date. This should be used only in special cases with care. + using DirectImage = SkiaHelper::DirectImage; + // Returns the contents as SkImage (possibly GPU-backed). + const sk_sp<SkImage>& GetSkImage(DirectImage direct = DirectImage::No) const; + sk_sp<SkShader> GetSkShader(const SkSamplingOptions& samplingOptions, + DirectImage direct = DirectImage::No) const; + // Returns the contents as alpha SkImage (possibly GPU-backed) + const sk_sp<SkImage>& GetAlphaSkImage(DirectImage direct = DirectImage::No) const; + sk_sp<SkShader> GetAlphaSkShader(const SkSamplingOptions& samplingOptions, + DirectImage direct = DirectImage::No) const; + + // Key for caching/hashing. + OString GetImageKey(DirectImage direct = DirectImage::No) const; + OString GetAlphaImageKey(DirectImage direct = DirectImage::No) const; + + // Returns true if it is known that this bitmap can be ignored if it's to be used + // as an alpha bitmap. An optimization, not guaranteed to return true for all such cases. + bool IsFullyOpaqueAsAlpha() const; + // Alpha type best suitable for the content. + SkAlphaType alphaType() const; + + // Tries to create direct GetAlphaSkImage() from direct GetSkImage(). + void TryDirectConvertToAlphaNoScaling(); + + // Dump contents to a file for debugging. + void dump(const char* file) const; + + // These are to be used only by unittests. + bool unittestHasBuffer() const { return mBuffer.get(); } + bool unittestHasImage() const { return mImage.get(); } + bool unittestHasAlphaImage() const { return mAlphaImage.get(); } + bool unittestHasEraseColor() const { return mEraseColorSet; } + bool unittestHasPendingScale() const { return mSize != mPixelsSize; } + const sal_uInt8* unittestGetBuffer() const { return mBuffer.get(); } + const SkImage* unittestGetImage() const { return mImage.get(); } + const SkImage* unittestGetAlphaImage() const { return mAlphaImage.get(); } + void unittestResetToImage() { ResetToSkImage(GetSkImage()); } + +private: + // This should be called whenever the contents have (possibly) changed. + // It may reset some cached data such as the checksum. + void DataChanged(); + // Reset the state to pixel data (resets cached images allocated in GetSkImage()/GetAlphaSkImage()). + void ResetToBuffer(); + // Sets the data only as SkImage (will be converted as needed). + void ResetToSkImage(sk_sp<SkImage> image); + // Resets all data (buffer and images). + void ResetAllData(); + // Call to ensure mBuffer has data (will convert from mImage if necessary). + void EnsureBitmapData(); + void EnsureBitmapData() const { return const_cast<SkiaSalBitmap*>(this)->EnsureBitmapData(); } + // Like EnsureBitmapData(), but will also make any shared data unique. + // Call before changing the data. + void EnsureBitmapUniqueData(); + // Allocate mBuffer (with uninitialized contents). + void CreateBitmapData(); + // Should be called whenever mPixelsSize or mBitCount is set/changed. + bool ComputeScanlineSize(); + // Resets information about pending scaling. To be called when mBuffer is resized or created. + void ResetPendingScaling(); + // Sets bitmap to be erased on demand. + void EraseInternal(const Color& color); + // Sets pixels to the erase color. + void PerformErase(); + // Try to find out if the content is completely black. Used for optimizations, + // not guaranteed to always return true for such bitmaps. + bool IsAllBlack() const; + void ReleaseBuffer(BitmapBuffer* pBuffer, BitmapAccessMode nMode, bool dontChangeToErase); + SkBitmap GetAsSkBitmap() const; + bool ConserveMemory() const; + void verify() const +#ifdef DBG_UTIL + ; +#else + { + } +#endif + + template <typename charT, typename traits> + friend std::basic_ostream<charT, traits>& operator<<(std::basic_ostream<charT, traits>& stream, + const SkiaSalBitmap* bitmap) + { + if (bitmap == nullptr) + return stream << "(null)"; + // p - has (non-trivial) palette + // I/i - has SkImage (on GPU/CPU), + // A/a - has alpha SkImage (on GPU/CPU) + // E - has erase color + // B - has pixel buffer + // (wxh) - has pending scaling (after each item) + stream << static_cast<const void*>(bitmap) << " " << bitmap->GetSize() << "x" + << bitmap->GetBitCount(); + if (bitmap->GetBitCount() <= 8 && !bitmap->Palette().IsGreyPalette8Bit()) + stream << "p"; + stream << "/"; + if (bitmap->mImage) + { + stream << (bitmap->mImage->isTextureBacked() ? "I" : "i"); + if (SkiaHelper::imageSize(bitmap->mImage) != bitmap->mSize) + stream << "(" << SkiaHelper::imageSize(bitmap->mImage) << ")"; + } + if (bitmap->mAlphaImage) + { + stream << (bitmap->mAlphaImage->isTextureBacked() ? "A" : "a"); + if (SkiaHelper::imageSize(bitmap->mAlphaImage) != bitmap->mSize) + stream << "(" << SkiaHelper::imageSize(bitmap->mAlphaImage) << ")"; + } + if (bitmap->mEraseColorSet) + stream << "E" << bitmap->mEraseColor; + if (bitmap->mBuffer) + { + stream << "B"; + if (bitmap->mSize != bitmap->mPixelsSize) + stream << "(" << bitmap->mPixelsSize << ")"; + } + return stream; + } + + BitmapPalette mPalette; + int mBitCount = 0; // bpp + Size mSize; + // The contents of the bitmap may be stored in several different ways: + // As mBuffer buffer, which normally stores pixels in the given format. + // As SkImage, as cached GPU-backed data, but sometimes also a result of some operation. + // There is no "master" storage that the other would be derived from. The usual + // mode of operation is that mBuffer holds the data, mImage is created + // on demand as GPU-backed cached data by calling GetSkImage(), and the cached mImage + // is reset by ResetCachedImage(). But sometimes only mImage will be set and in that case + // mBuffer must be filled from it on demand if necessary by EnsureBitmapData(). + boost::shared_ptr<sal_uInt8[]> mBuffer; + int mScanlineSize; // size of one row in mBuffer (based on mPixelsSize) + sk_sp<SkImage> mImage; // possibly GPU-backed + sk_sp<SkImage> mAlphaImage; // cached contents as alpha image, possibly GPU-backed + // Actual scaling triggered by scale() is done on-demand. This is the size of the pixel + // data in mBuffer, if it differs from mSize, then there is a scaling operation pending. + Size mPixelsSize; + BmpScaleFlag mScaleQuality = BmpScaleFlag::BestQuality; // quality for on-demand scaling + // Erase() is delayed, just sets these two instead of filling the buffer. + bool mEraseColorSet = false; + Color mEraseColor; + int mAnyAccessCount = 0; // number of any kind of AcquireAccess() that have not been released +#ifdef DBG_UTIL + int mWriteAccessCount = 0; // number of write AcquireAccess() that have not been released +#endif +}; + +#endif // INCLUDED_VCL_INC_SKIA_SALBMP_H + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |