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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
commit26a029d407be480d791972afb5975cf62c9360a6 (patch)
treef435a8308119effd964b339f76abb83a57c29483 /gfx/2d/SourceSurfaceSkia.cpp
parentInitial commit. (diff)
downloadfirefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz
firefox-26a029d407be480d791972afb5975cf62c9360a6.zip
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'gfx/2d/SourceSurfaceSkia.cpp')
-rw-r--r--gfx/2d/SourceSurfaceSkia.cpp228
1 files changed, 228 insertions, 0 deletions
diff --git a/gfx/2d/SourceSurfaceSkia.cpp b/gfx/2d/SourceSurfaceSkia.cpp
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+++ b/gfx/2d/SourceSurfaceSkia.cpp
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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/. */
+
+#include "Logging.h"
+#include "SourceSurfaceSkia.h"
+#include "HelpersSkia.h"
+#include "DrawTargetSkia.h"
+#include "skia/include/core/SkData.h"
+#include "skia/include/core/SkImage.h"
+#include "skia/include/core/SkSurface.h"
+#include "skia/include/private/base/SkMalloc.h"
+#include "mozilla/CheckedInt.h"
+
+namespace mozilla::gfx {
+
+SourceSurfaceSkia::SourceSurfaceSkia()
+ : mFormat(SurfaceFormat::UNKNOWN),
+ mStride(0),
+ mDrawTarget(nullptr),
+ mChangeMutex("SourceSurfaceSkia::mChangeMutex"),
+ mIsMapped(false) {}
+
+SourceSurfaceSkia::~SourceSurfaceSkia() {
+ // if mIsMapped is true then mChangeMutex will be locked
+ // which will cause problems during destruction.
+ MOZ_RELEASE_ASSERT(!mIsMapped);
+}
+
+IntSize SourceSurfaceSkia::GetSize() const { return mSize; }
+
+SurfaceFormat SourceSurfaceSkia::GetFormat() const { return mFormat; }
+
+// This is only ever called by the DT destructor, which can only ever happen
+// from one place at a time. Therefore it doesn't need to hold the ChangeMutex
+// as mSurface is never read to directly and is just there to keep the object
+// alive, which itself is refcounted in a thread-safe manner.
+void SourceSurfaceSkia::GiveSurface(SkSurface* aSurface) {
+ mSurface.reset(aSurface);
+ mDrawTarget = nullptr;
+}
+
+sk_sp<SkImage> SourceSurfaceSkia::GetImage(Maybe<MutexAutoLock>* aLock) {
+ // If we were provided a lock object, we can let the caller access
+ // a shared SkImage and we know it won't go away while the lock is held.
+ // Otherwise we need to call DrawTargetWillChange to ensure we have our
+ // own SkImage.
+ if (aLock) {
+ MOZ_ASSERT(aLock->isNothing());
+ aLock->emplace(mChangeMutex);
+
+ // Now that we are locked, we can check mDrawTarget. If it's null, then
+ // we're not shared and we can unlock eagerly.
+ if (!mDrawTarget) {
+ aLock->reset();
+ }
+ } else {
+ DrawTargetWillChange();
+ }
+ sk_sp<SkImage> image = mImage;
+ return image;
+}
+
+static sk_sp<SkData> MakeSkData(void* aData, int32_t aHeight, size_t aStride) {
+ CheckedInt<size_t> size = aStride;
+ size *= aHeight;
+ if (size.isValid()) {
+ void* mem = sk_malloc_flags(size.value(), 0);
+ if (mem) {
+ if (aData) {
+ memcpy(mem, aData, size.value());
+ }
+ return SkData::MakeFromMalloc(mem, size.value());
+ }
+ }
+ return nullptr;
+}
+
+static sk_sp<SkImage> ReadSkImage(const sk_sp<SkImage>& aImage,
+ const SkImageInfo& aInfo, size_t aStride,
+ int aX = 0, int aY = 0) {
+ if (sk_sp<SkData> data = MakeSkData(nullptr, aInfo.height(), aStride)) {
+ if (aImage->readPixels(aInfo, data->writable_data(), aStride, aX, aY,
+ SkImage::kDisallow_CachingHint)) {
+ return SkImage::MakeRasterData(aInfo, data, aStride);
+ }
+ }
+ return nullptr;
+}
+
+bool SourceSurfaceSkia::InitFromData(unsigned char* aData, const IntSize& aSize,
+ int32_t aStride, SurfaceFormat aFormat) {
+ sk_sp<SkData> data = MakeSkData(aData, aSize.height, aStride);
+ if (!data) {
+ return false;
+ }
+
+ SkImageInfo info = MakeSkiaImageInfo(aSize, aFormat);
+ mImage = SkImage::MakeRasterData(info, data, aStride);
+ if (!mImage) {
+ return false;
+ }
+
+ mSize = aSize;
+ mFormat = aFormat;
+ mStride = aStride;
+ return true;
+}
+
+bool SourceSurfaceSkia::InitFromImage(const sk_sp<SkImage>& aImage,
+ SurfaceFormat aFormat,
+ DrawTargetSkia* aOwner) {
+ if (!aImage) {
+ return false;
+ }
+
+ mSize = IntSize(aImage->width(), aImage->height());
+
+ // For the raster image case, we want to use the format and stride
+ // information that the underlying raster image is using, which is
+ // reliable.
+ // For the GPU case (for which peekPixels is false), we can't easily
+ // figure this information out. It is better to report the originally
+ // intended format and stride that we will convert to if this GPU
+ // image is ever read back into a raster image.
+ SkPixmap pixmap;
+ if (aImage->peekPixels(&pixmap)) {
+ mFormat =
+ aFormat != SurfaceFormat::UNKNOWN
+ ? aFormat
+ : SkiaColorTypeToGfxFormat(pixmap.colorType(), pixmap.alphaType());
+ mStride = pixmap.rowBytes();
+ } else if (aFormat != SurfaceFormat::UNKNOWN) {
+ mFormat = aFormat;
+ SkImageInfo info = MakeSkiaImageInfo(mSize, mFormat);
+ mStride = GetAlignedStride<4>(info.width(), info.bytesPerPixel());
+ if (!mStride) {
+ return false;
+ }
+ } else {
+ return false;
+ }
+
+ mImage = aImage;
+
+ if (aOwner) {
+ mDrawTarget = aOwner;
+ }
+
+ return true;
+}
+
+already_AddRefed<SourceSurface> SourceSurfaceSkia::ExtractSubrect(
+ const IntRect& aRect) {
+ if (!mImage || aRect.IsEmpty() || !GetRect().Contains(aRect)) {
+ return nullptr;
+ }
+ SkImageInfo info = MakeSkiaImageInfo(aRect.Size(), mFormat);
+ size_t stride = GetAlignedStride<4>(info.width(), info.bytesPerPixel());
+ if (!stride) {
+ return nullptr;
+ }
+ sk_sp<SkImage> subImage = ReadSkImage(mImage, info, stride, aRect.x, aRect.y);
+ if (!subImage) {
+ return nullptr;
+ }
+ RefPtr<SourceSurfaceSkia> surface = new SourceSurfaceSkia;
+ if (!surface->InitFromImage(subImage)) {
+ return nullptr;
+ }
+ return surface.forget().downcast<SourceSurface>();
+}
+
+uint8_t* SourceSurfaceSkia::GetData() {
+ if (!mImage) {
+ return nullptr;
+ }
+ SkPixmap pixmap;
+ if (!mImage->peekPixels(&pixmap)) {
+ gfxCriticalError() << "Failed accessing pixels for Skia raster image";
+ }
+ return reinterpret_cast<uint8_t*>(pixmap.writable_addr());
+}
+
+bool SourceSurfaceSkia::Map(MapType, MappedSurface* aMappedSurface)
+ MOZ_NO_THREAD_SAFETY_ANALYSIS {
+ mChangeMutex.Lock();
+ aMappedSurface->mData = GetData();
+ aMappedSurface->mStride = Stride();
+ mIsMapped = !!aMappedSurface->mData;
+ bool isMapped = mIsMapped;
+ if (!mIsMapped) {
+ mChangeMutex.Unlock();
+ }
+ // Static analysis will warn due to a conditional Unlock
+ MOZ_PUSH_IGNORE_THREAD_SAFETY
+ return isMapped;
+ MOZ_POP_THREAD_SAFETY
+}
+
+void SourceSurfaceSkia::Unmap() MOZ_NO_THREAD_SAFETY_ANALYSIS {
+ mChangeMutex.AssertCurrentThreadOwns();
+ MOZ_ASSERT(mIsMapped);
+ mIsMapped = false;
+ mChangeMutex.Unlock();
+}
+
+void SourceSurfaceSkia::DrawTargetWillChange() {
+ MutexAutoLock lock(mChangeMutex);
+ if (mDrawTarget.exchange(nullptr)) {
+ // Raster snapshots do not use Skia's internal copy-on-write mechanism,
+ // so we need to do an explicit copy here.
+ // GPU snapshots, for which peekPixels is false, will already be dealt
+ // with automatically via the internal copy-on-write mechanism, so we
+ // don't need to do anything for them here.
+ SkPixmap pixmap;
+ if (mImage->peekPixels(&pixmap)) {
+ mImage = ReadSkImage(mImage, pixmap.info(), pixmap.rowBytes());
+ if (!mImage) {
+ gfxCriticalError() << "Failed copying Skia raster snapshot";
+ }
+ }
+ }
+}
+
+} // namespace mozilla::gfx