forked from mirrors/gecko-dev
9ddc42292b
This fixes a couple potential leaks (e.g., see the UPowerClient changes, we weren't freeing all the devices properly). Differential Revision: https://phabricator.services.mozilla.com/D141775
121 lines
3.9 KiB
C++
121 lines
3.9 KiB
C++
/* vim:set sw=2 sts=2 et cin: */
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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 <gdk-pixbuf/gdk-pixbuf.h>
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#include "nsImageToPixbuf.h"
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#include "imgIContainer.h"
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#include "mozilla/gfx/2D.h"
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#include "mozilla/RefPtr.h"
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#include "GRefPtr.h"
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#include "nsCOMPtr.h"
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using mozilla::gfx::DataSourceSurface;
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using mozilla::gfx::SurfaceFormat;
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inline unsigned char unpremultiply(unsigned char color, unsigned char alpha) {
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if (alpha == 0) return 0;
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// plus alpha/2 to round instead of truncate
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return (color * 255 + alpha / 2) / alpha;
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}
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already_AddRefed<GdkPixbuf> nsImageToPixbuf::ImageToPixbuf(
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imgIContainer* aImage, const mozilla::Maybe<nsIntSize>& aOverrideSize) {
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RefPtr<SourceSurface> surface;
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const uint32_t flags =
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imgIContainer::FLAG_SYNC_DECODE | imgIContainer::FLAG_ASYNC_NOTIFY;
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if (aOverrideSize) {
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surface = aImage->GetFrameAtSize(*aOverrideSize,
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imgIContainer::FRAME_CURRENT, flags);
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} else {
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surface = aImage->GetFrame(imgIContainer::FRAME_CURRENT, flags);
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}
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// If the last call failed, it was probably because our call stack originates
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// in an imgINotificationObserver event, meaning that we're not allowed
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// request a sync decode. Presumably the originating event is something
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// sensible like OnStopFrame(), so we can just retry the call without a sync
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// decode.
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if (!surface) {
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if (aOverrideSize) {
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surface =
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aImage->GetFrameAtSize(*aOverrideSize, imgIContainer::FRAME_CURRENT,
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imgIContainer::FLAG_NONE);
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} else {
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surface = aImage->GetFrame(imgIContainer::FRAME_CURRENT,
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imgIContainer::FLAG_NONE);
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}
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}
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NS_ENSURE_TRUE(surface, nullptr);
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return SourceSurfaceToPixbuf(surface, surface->GetSize().width,
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surface->GetSize().height);
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}
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already_AddRefed<GdkPixbuf> nsImageToPixbuf::SourceSurfaceToPixbuf(
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SourceSurface* aSurface, int32_t aWidth, int32_t aHeight) {
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MOZ_ASSERT(aWidth <= aSurface->GetSize().width &&
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aHeight <= aSurface->GetSize().height,
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"Requested rect is bigger than the supplied surface");
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RefPtr<GdkPixbuf> pixbuf =
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dont_AddRef(gdk_pixbuf_new(GDK_COLORSPACE_RGB, TRUE, 8, aWidth, aHeight));
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if (!pixbuf) {
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return nullptr;
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}
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uint32_t destStride = gdk_pixbuf_get_rowstride(pixbuf);
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guchar* destPixels = gdk_pixbuf_get_pixels(pixbuf);
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RefPtr<DataSourceSurface> dataSurface = aSurface->GetDataSurface();
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DataSourceSurface::MappedSurface map;
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if (!dataSurface->Map(DataSourceSurface::MapType::READ, &map)) {
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return nullptr;
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}
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uint8_t* srcData = map.mData;
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int32_t srcStride = map.mStride;
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SurfaceFormat format = dataSurface->GetFormat();
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for (int32_t row = 0; row < aHeight; ++row) {
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for (int32_t col = 0; col < aWidth; ++col) {
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guchar* destPixel = destPixels + row * destStride + 4 * col;
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uint32_t* srcPixel =
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reinterpret_cast<uint32_t*>((srcData + row * srcStride + 4 * col));
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if (format == SurfaceFormat::B8G8R8A8) {
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const uint8_t a = (*srcPixel >> 24) & 0xFF;
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const uint8_t r = unpremultiply((*srcPixel >> 16) & 0xFF, a);
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const uint8_t g = unpremultiply((*srcPixel >> 8) & 0xFF, a);
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const uint8_t b = unpremultiply((*srcPixel >> 0) & 0xFF, a);
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*destPixel++ = r;
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*destPixel++ = g;
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*destPixel++ = b;
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*destPixel++ = a;
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} else {
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MOZ_ASSERT(format == SurfaceFormat::B8G8R8X8);
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const uint8_t r = (*srcPixel >> 16) & 0xFF;
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const uint8_t g = (*srcPixel >> 8) & 0xFF;
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const uint8_t b = (*srcPixel >> 0) & 0xFF;
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*destPixel++ = r;
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*destPixel++ = g;
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*destPixel++ = b;
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*destPixel++ = 0xFF; // A
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}
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}
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}
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dataSurface->Unmap();
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return pixbuf.forget();
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}
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