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883849ee32
This patch was automatically generated using the following script: function convert() { echo "Converting $1 to $2..." find . \ ! -wholename "*/.git*" \ ! -wholename "obj-ff-dbg*" \ -type f \ \( -iname "*.cpp" \ -o -iname "*.h" \ -o -iname "*.c" \ -o -iname "*.cc" \ -o -iname "*.idl" \ -o -iname "*.ipdl" \ -o -iname "*.ipdlh" \ -o -iname "*.mm" \) | \ xargs -n 1 sed -i -e "s/\b$1\b/$2/g" } convert MOZ_OVERRIDE override convert MOZ_FINAL final
413 lines
12 KiB
C++
413 lines
12 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "gfxBlur.h"
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#include "gfx2DGlue.h"
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#include "gfxContext.h"
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#include "gfxPlatform.h"
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#include "mozilla/gfx/2D.h"
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#include "mozilla/gfx/Blur.h"
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#include "mozilla/gfx/PathHelpers.h"
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#include "mozilla/UniquePtr.h"
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#include "nsExpirationTracker.h"
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#include "nsClassHashtable.h"
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using namespace mozilla;
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using namespace mozilla::gfx;
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gfxAlphaBoxBlur::gfxAlphaBoxBlur()
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{
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}
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gfxAlphaBoxBlur::~gfxAlphaBoxBlur()
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{
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mContext = nullptr;
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}
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gfxContext*
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gfxAlphaBoxBlur::Init(const gfxRect& aRect,
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const gfxIntSize& aSpreadRadius,
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const gfxIntSize& aBlurRadius,
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const gfxRect* aDirtyRect,
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const gfxRect* aSkipRect)
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{
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mozilla::gfx::Rect rect(Float(aRect.x), Float(aRect.y),
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Float(aRect.width), Float(aRect.height));
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IntSize spreadRadius(aSpreadRadius.width, aSpreadRadius.height);
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IntSize blurRadius(aBlurRadius.width, aBlurRadius.height);
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UniquePtr<Rect> dirtyRect;
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if (aDirtyRect) {
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dirtyRect = MakeUnique<Rect>(Float(aDirtyRect->x),
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Float(aDirtyRect->y),
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Float(aDirtyRect->width),
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Float(aDirtyRect->height));
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}
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UniquePtr<Rect> skipRect;
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if (aSkipRect) {
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skipRect = MakeUnique<Rect>(Float(aSkipRect->x),
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Float(aSkipRect->y),
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Float(aSkipRect->width),
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Float(aSkipRect->height));
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}
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mBlur = MakeUnique<AlphaBoxBlur>(rect, spreadRadius, blurRadius, dirtyRect.get(), skipRect.get());
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size_t blurDataSize = mBlur->GetSurfaceAllocationSize();
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if (blurDataSize == 0)
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return nullptr;
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IntSize size = mBlur->GetSize();
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// Make an alpha-only surface to draw on. We will play with the data after
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// everything is drawn to create a blur effect.
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mData = new (std::nothrow) unsigned char[blurDataSize];
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if (!mData) {
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return nullptr;
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}
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memset(mData, 0, blurDataSize);
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mozilla::RefPtr<DrawTarget> dt =
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gfxPlatform::GetPlatform()->CreateDrawTargetForData(mData, size,
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mBlur->GetStride(),
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SurfaceFormat::A8);
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if (!dt) {
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return nullptr;
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}
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IntRect irect = mBlur->GetRect();
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gfxPoint topleft(irect.TopLeft().x, irect.TopLeft().y);
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mContext = new gfxContext(dt);
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mContext->SetMatrix(gfxMatrix::Translation(-topleft));
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return mContext;
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}
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void
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DrawBlur(gfxContext* aDestinationCtx,
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SourceSurface* aBlur,
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const IntPoint& aTopLeft,
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const Rect* aDirtyRect)
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{
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DrawTarget *dest = aDestinationCtx->GetDrawTarget();
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nsRefPtr<gfxPattern> thebesPat = aDestinationCtx->GetPattern();
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Pattern* pat = thebesPat->GetPattern(dest, nullptr);
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Matrix oldTransform = dest->GetTransform();
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Matrix newTransform = oldTransform;
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newTransform.PreTranslate(aTopLeft.x, aTopLeft.y);
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// Avoid a semi-expensive clip operation if we can, otherwise
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// clip to the dirty rect
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if (aDirtyRect) {
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dest->PushClipRect(*aDirtyRect);
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}
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dest->SetTransform(newTransform);
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dest->MaskSurface(*pat, aBlur, Point(0, 0));
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dest->SetTransform(oldTransform);
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if (aDirtyRect) {
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dest->PopClip();
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}
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}
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TemporaryRef<SourceSurface>
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gfxAlphaBoxBlur::DoBlur(DrawTarget* aDT, IntPoint* aTopLeft)
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{
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mBlur->Blur(mData);
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*aTopLeft = mBlur->GetRect().TopLeft();
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return aDT->CreateSourceSurfaceFromData(mData,
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mBlur->GetSize(),
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mBlur->GetStride(),
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SurfaceFormat::A8);
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}
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void
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gfxAlphaBoxBlur::Paint(gfxContext* aDestinationCtx)
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{
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if (!mContext)
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return;
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DrawTarget *dest = aDestinationCtx->GetDrawTarget();
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if (!dest) {
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NS_WARNING("Blurring not supported for Thebes contexts!");
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return;
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}
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Rect* dirtyRect = mBlur->GetDirtyRect();
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IntPoint topLeft;
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RefPtr<SourceSurface> mask = DoBlur(dest, &topLeft);
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if (!mask) {
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NS_ERROR("Failed to create mask!");
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return;
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}
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DrawBlur(aDestinationCtx, mask, topLeft, dirtyRect);
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}
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gfxIntSize gfxAlphaBoxBlur::CalculateBlurRadius(const gfxPoint& aStd)
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{
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mozilla::gfx::Point std(Float(aStd.x), Float(aStd.y));
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IntSize size = AlphaBoxBlur::CalculateBlurRadius(std);
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return gfxIntSize(size.width, size.height);
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}
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struct BlurCacheKey : public PLDHashEntryHdr {
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typedef const BlurCacheKey& KeyType;
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typedef const BlurCacheKey* KeyTypePointer;
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enum { ALLOW_MEMMOVE = true };
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gfxRect mRect;
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gfxIntSize mBlurRadius;
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gfxRect mSkipRect;
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BackendType mBackend;
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BlurCacheKey(const gfxRect& aRect, const gfxIntSize &aBlurRadius, const gfxRect& aSkipRect, BackendType aBackend)
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: mRect(aRect)
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, mBlurRadius(aBlurRadius)
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, mSkipRect(aSkipRect)
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, mBackend(aBackend)
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{ }
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explicit BlurCacheKey(const BlurCacheKey* aOther)
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: mRect(aOther->mRect)
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, mBlurRadius(aOther->mBlurRadius)
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, mSkipRect(aOther->mSkipRect)
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, mBackend(aOther->mBackend)
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{ }
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static PLDHashNumber
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HashKey(const KeyTypePointer aKey)
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{
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PLDHashNumber hash = HashBytes(&aKey->mRect.x, 4 * sizeof(gfxFloat));
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hash = AddToHash(hash, aKey->mBlurRadius.width, aKey->mBlurRadius.height);
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hash = AddToHash(hash, HashBytes(&aKey->mSkipRect.x, 4 * sizeof(gfxFloat)));
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hash = AddToHash(hash, (uint32_t)aKey->mBackend);
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return hash;
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}
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bool KeyEquals(KeyTypePointer aKey) const
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{
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if (aKey->mRect.IsEqualInterior(mRect) &&
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aKey->mBlurRadius == mBlurRadius &&
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aKey->mSkipRect.IsEqualInterior(mSkipRect) &&
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aKey->mBackend == mBackend) {
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return true;
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}
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return false;
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}
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static KeyTypePointer KeyToPointer(KeyType aKey)
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{
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return &aKey;
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}
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};
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/**
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* This class is what is cached. It need to be allocated in an object separated
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* to the cache entry to be able to be tracked by the nsExpirationTracker.
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* */
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struct BlurCacheData {
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BlurCacheData(SourceSurface* aBlur, const IntPoint& aTopLeft, const gfxRect& aDirtyRect, const BlurCacheKey& aKey)
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: mBlur(aBlur)
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, mTopLeft(aTopLeft)
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, mDirtyRect(aDirtyRect)
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, mKey(aKey)
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{}
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BlurCacheData(const BlurCacheData& aOther)
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: mBlur(aOther.mBlur)
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, mTopLeft(aOther.mTopLeft)
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, mDirtyRect(aOther.mDirtyRect)
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, mKey(aOther.mKey)
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{ }
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nsExpirationState *GetExpirationState() {
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return &mExpirationState;
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}
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nsExpirationState mExpirationState;
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RefPtr<SourceSurface> mBlur;
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IntPoint mTopLeft;
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gfxRect mDirtyRect;
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BlurCacheKey mKey;
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};
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/**
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* This class implements a cache with no maximum size, that retains the
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* SourceSurfaces used to draw the blurs.
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*
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* An entry stays in the cache as long as it is used often.
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*/
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class BlurCache final : public nsExpirationTracker<BlurCacheData,4>
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{
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public:
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BlurCache()
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: nsExpirationTracker<BlurCacheData, 4>(GENERATION_MS)
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{
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}
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virtual void NotifyExpired(BlurCacheData* aObject)
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{
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RemoveObject(aObject);
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mHashEntries.Remove(aObject->mKey);
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}
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BlurCacheData* Lookup(const gfxRect& aRect,
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const gfxIntSize& aBlurRadius,
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const gfxRect& aSkipRect,
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BackendType aBackendType,
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const gfxRect* aDirtyRect)
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{
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BlurCacheData* blur =
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mHashEntries.Get(BlurCacheKey(aRect, aBlurRadius, aSkipRect, aBackendType));
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if (blur) {
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if (aDirtyRect && !blur->mDirtyRect.Contains(*aDirtyRect)) {
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return nullptr;
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}
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MarkUsed(blur);
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}
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return blur;
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}
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// Returns true if we successfully register the blur in the cache, false
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// otherwise.
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bool RegisterEntry(BlurCacheData* aValue)
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{
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nsresult rv = AddObject(aValue);
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if (NS_FAILED(rv)) {
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// We are OOM, and we cannot track this object. We don't want stall
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// entries in the hash table (since the expiration tracker is responsible
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// for removing the cache entries), so we avoid putting that entry in the
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// table, which is a good things considering we are short on memory
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// anyway, we probably don't want to retain things.
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return false;
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}
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mHashEntries.Put(aValue->mKey, aValue);
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return true;
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}
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protected:
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static const uint32_t GENERATION_MS = 1000;
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/**
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* FIXME use nsTHashtable to avoid duplicating the BlurCacheKey.
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* https://bugzilla.mozilla.org/show_bug.cgi?id=761393#c47
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*/
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nsClassHashtable<BlurCacheKey, BlurCacheData> mHashEntries;
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};
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static BlurCache* gBlurCache = nullptr;
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SourceSurface*
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GetCachedBlur(DrawTarget *aDT,
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const gfxRect& aRect,
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const gfxIntSize& aBlurRadius,
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const gfxRect& aSkipRect,
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const gfxRect& aDirtyRect,
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IntPoint* aTopLeft)
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{
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if (!gBlurCache) {
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gBlurCache = new BlurCache();
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}
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BlurCacheData* cached = gBlurCache->Lookup(aRect, aBlurRadius, aSkipRect,
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aDT->GetBackendType(),
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&aDirtyRect);
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if (cached) {
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*aTopLeft = cached->mTopLeft;
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return cached->mBlur;
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}
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return nullptr;
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}
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void
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CacheBlur(DrawTarget *aDT,
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const gfxRect& aRect,
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const gfxIntSize& aBlurRadius,
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const gfxRect& aSkipRect,
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SourceSurface* aBlur,
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const IntPoint& aTopLeft,
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const gfxRect& aDirtyRect)
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{
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// If we already had a cached value with this key, but an incorrect dirty region then just update
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// the existing entry
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if (BlurCacheData* cached = gBlurCache->Lookup(aRect, aBlurRadius, aSkipRect,
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aDT->GetBackendType(),
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nullptr)) {
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cached->mBlur = aBlur;
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cached->mTopLeft = aTopLeft;
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cached->mDirtyRect = aDirtyRect;
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return;
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}
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BlurCacheKey key(aRect, aBlurRadius, aSkipRect, aDT->GetBackendType());
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BlurCacheData* data = new BlurCacheData(aBlur, aTopLeft, aDirtyRect, key);
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if (!gBlurCache->RegisterEntry(data)) {
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delete data;
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}
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}
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void
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gfxAlphaBoxBlur::ShutdownBlurCache()
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{
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delete gBlurCache;
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gBlurCache = nullptr;
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}
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/* static */ void
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gfxAlphaBoxBlur::BlurRectangle(gfxContext *aDestinationCtx,
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const gfxRect& aRect,
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RectCornerRadii* aCornerRadii,
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const gfxPoint& aBlurStdDev,
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const gfxRGBA& aShadowColor,
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const gfxRect& aDirtyRect,
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const gfxRect& aSkipRect)
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{
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DrawTarget& aDrawTarget = *aDestinationCtx->GetDrawTarget();
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gfxIntSize blurRadius = CalculateBlurRadius(aBlurStdDev);
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IntPoint topLeft;
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RefPtr<SourceSurface> surface = GetCachedBlur(&aDrawTarget, aRect, blurRadius, aSkipRect, aDirtyRect, &topLeft);
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if (!surface) {
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// Create the temporary surface for blurring
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gfxAlphaBoxBlur blur;
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gfxContext* blurCtx = blur.Init(aRect, gfxIntSize(), blurRadius, &aDirtyRect, &aSkipRect);
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if (!blurCtx) {
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return;
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}
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DrawTarget* blurDT = blurCtx->GetDrawTarget();
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Rect shadowGfxRect = ToRect(aRect);
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shadowGfxRect.Round();
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ColorPattern black(Color(0.f, 0.f, 0.f, 1.f)); // For masking, so no ToDeviceColor!
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if (aCornerRadii) {
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RefPtr<Path> roundedRect = MakePathForRoundedRect(*blurDT,
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shadowGfxRect,
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*aCornerRadii);
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blurDT->Fill(roundedRect, black);
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} else {
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blurDT->FillRect(shadowGfxRect, black);
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}
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surface = blur.DoBlur(&aDrawTarget, &topLeft);
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if (!surface) {
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return;
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}
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CacheBlur(&aDrawTarget, aRect, blurRadius, aSkipRect, surface, topLeft, aDirtyRect);
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}
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aDestinationCtx->SetColor(aShadowColor);
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Rect dirtyRect(aDirtyRect.x, aDirtyRect.y, aDirtyRect.width, aDirtyRect.height);
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DrawBlur(aDestinationCtx, surface, topLeft, &dirtyRect);
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}
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