gecko-dev/image/DynamicImage.cpp

348 lines
7.3 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "DynamicImage.h"
#include "gfxPlatform.h"
#include "gfxUtils.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/RefPtr.h"
#include "ImageRegion.h"
#include "Orientation.h"
#include "SVGImageContext.h"
#include "mozilla/MemoryReporting.h"
using namespace mozilla;
using namespace mozilla::gfx;
using mozilla::layers::LayerManager;
using mozilla::layers::ImageContainer;
namespace mozilla {
namespace image {
// Inherited methods from Image.
already_AddRefed<ProgressTracker>
DynamicImage::GetProgressTracker()
{
return nullptr;
}
size_t
DynamicImage::SizeOfSourceWithComputedFallback(MallocSizeOf aMallocSizeOf) const
{
return 0;
}
void
DynamicImage::CollectSizeOfSurfaces(nsTArray<SurfaceMemoryCounter>& aCounters,
MallocSizeOf aMallocSizeOf) const
{
// We can't report anything useful because gfxDrawable doesn't expose this
// information.
}
void
DynamicImage::IncrementAnimationConsumers()
{ }
void
DynamicImage::DecrementAnimationConsumers()
{ }
#ifdef DEBUG
uint32_t
DynamicImage::GetAnimationConsumers()
{
return 0;
}
#endif
nsresult
DynamicImage::OnImageDataAvailable(nsIRequest* aRequest,
nsISupports* aContext,
nsIInputStream* aInStr,
uint64_t aSourceOffset,
uint32_t aCount)
{
return NS_OK;
}
nsresult
DynamicImage::OnImageDataComplete(nsIRequest* aRequest,
nsISupports* aContext,
nsresult aStatus,
bool aLastPart)
{
return NS_OK;
}
void
DynamicImage::OnSurfaceDiscarded()
{ }
void
DynamicImage::SetInnerWindowID(uint64_t aInnerWindowId)
{ }
uint64_t
DynamicImage::InnerWindowID() const
{
return 0;
}
bool
DynamicImage::HasError()
{
return !mDrawable;
}
void
DynamicImage::SetHasError()
{ }
ImageURL*
DynamicImage::GetURI()
{
return nullptr;
}
// Methods inherited from XPCOM interfaces.
NS_IMPL_ISUPPORTS(DynamicImage, imgIContainer)
NS_IMETHODIMP
DynamicImage::GetWidth(int32_t* aWidth)
{
*aWidth = mDrawable->Size().width;
return NS_OK;
}
NS_IMETHODIMP
DynamicImage::GetHeight(int32_t* aHeight)
{
*aHeight = mDrawable->Size().height;
return NS_OK;
}
NS_IMETHODIMP
DynamicImage::GetIntrinsicSize(nsSize* aSize)
{
IntSize intSize(mDrawable->Size());
*aSize = nsSize(intSize.width, intSize.height);
return NS_OK;
}
NS_IMETHODIMP
DynamicImage::GetIntrinsicRatio(nsSize* aSize)
{
IntSize intSize(mDrawable->Size());
*aSize = nsSize(intSize.width, intSize.height);
return NS_OK;
}
NS_IMETHODIMP_(Orientation)
DynamicImage::GetOrientation()
{
return Orientation();
}
NS_IMETHODIMP
DynamicImage::GetType(uint16_t* aType)
{
*aType = imgIContainer::TYPE_RASTER;
return NS_OK;
}
NS_IMETHODIMP
DynamicImage::GetAnimated(bool* aAnimated)
{
*aAnimated = false;
return NS_OK;
}
NS_IMETHODIMP_(already_AddRefed<SourceSurface>)
DynamicImage::GetFrame(uint32_t aWhichFrame,
uint32_t aFlags)
{
IntSize size(mDrawable->Size());
return GetFrameAtSize(IntSize(size.width, size.height),
aWhichFrame,
aFlags);
}
NS_IMETHODIMP_(already_AddRefed<SourceSurface>)
DynamicImage::GetFrameAtSize(const IntSize& aSize,
uint32_t aWhichFrame,
uint32_t aFlags)
{
RefPtr<DrawTarget> dt = gfxPlatform::GetPlatform()->
CreateOffscreenContentDrawTarget(aSize, SurfaceFormat::B8G8R8A8);
if (!dt) {
gfxWarning() <<
"DynamicImage::GetFrame failed in CreateOffscreenContentDrawTarget";
return nullptr;
}
RefPtr<gfxContext> context = new gfxContext(dt);
auto result = Draw(context, aSize, ImageRegion::Create(aSize),
aWhichFrame, Filter::POINT, Nothing(), aFlags);
return result == DrawResult::SUCCESS ? dt->Snapshot() : nullptr;
}
NS_IMETHODIMP_(bool)
DynamicImage::IsOpaque()
{
// XXX(seth): For performance reasons it'd be better to return true here, but
// I'm not sure how we can guarantee it for an arbitrary gfxDrawable.
return false;
}
NS_IMETHODIMP_(bool)
DynamicImage::IsImageContainerAvailable(LayerManager* aManager, uint32_t aFlags)
{
return false;
}
NS_IMETHODIMP_(already_AddRefed<ImageContainer>)
DynamicImage::GetImageContainer(LayerManager* aManager, uint32_t aFlags)
{
return nullptr;
}
NS_IMETHODIMP_(DrawResult)
DynamicImage::Draw(gfxContext* aContext,
const nsIntSize& aSize,
const ImageRegion& aRegion,
uint32_t aWhichFrame,
Filter aFilter,
const Maybe<SVGImageContext>& aSVGContext,
uint32_t aFlags)
{
MOZ_ASSERT(!aSize.IsEmpty(), "Unexpected empty size");
IntSize drawableSize(mDrawable->Size());
if (aSize == drawableSize) {
gfxUtils::DrawPixelSnapped(aContext, mDrawable, drawableSize, aRegion,
SurfaceFormat::B8G8R8A8, aFilter);
return DrawResult::SUCCESS;
}
gfxSize scale(double(aSize.width) / drawableSize.width,
double(aSize.height) / drawableSize.height);
ImageRegion region(aRegion);
region.Scale(1.0 / scale.width, 1.0 / scale.height);
gfxContextMatrixAutoSaveRestore saveMatrix(aContext);
aContext->Multiply(gfxMatrix::Scaling(scale.width, scale.height));
gfxUtils::DrawPixelSnapped(aContext, mDrawable, drawableSize, region,
SurfaceFormat::B8G8R8A8, aFilter);
return DrawResult::SUCCESS;
}
NS_IMETHODIMP
DynamicImage::StartDecoding()
{
return NS_OK;
}
NS_IMETHODIMP
DynamicImage::RequestDecodeForSize(const nsIntSize& aSize, uint32_t aFlags)
{
return NS_OK;
}
NS_IMETHODIMP
DynamicImage::LockImage()
{
return NS_OK;
}
NS_IMETHODIMP
DynamicImage::UnlockImage()
{
return NS_OK;
}
NS_IMETHODIMP
DynamicImage::RequestDiscard()
{
return NS_OK;
}
NS_IMETHODIMP_(void)
DynamicImage::RequestRefresh(const mozilla::TimeStamp& aTime)
{ }
NS_IMETHODIMP
DynamicImage::GetAnimationMode(uint16_t* aAnimationMode)
{
*aAnimationMode = kNormalAnimMode;
return NS_OK;
}
NS_IMETHODIMP
DynamicImage::SetAnimationMode(uint16_t aAnimationMode)
{
return NS_OK;
}
NS_IMETHODIMP
DynamicImage::ResetAnimation()
{
return NS_OK;
}
NS_IMETHODIMP_(float)
DynamicImage::GetFrameIndex(uint32_t aWhichFrame)
{
return 0;
}
NS_IMETHODIMP_(int32_t)
DynamicImage::GetFirstFrameDelay()
{
return 0;
}
NS_IMETHODIMP_(void)
DynamicImage::SetAnimationStartTime(const mozilla::TimeStamp& aTime)
{ }
nsIntSize
DynamicImage::OptimalImageSizeForDest(const gfxSize& aDest,
uint32_t aWhichFrame,
Filter aFilter, uint32_t aFlags)
{
IntSize size(mDrawable->Size());
return nsIntSize(size.width, size.height);
}
NS_IMETHODIMP_(nsIntRect)
DynamicImage::GetImageSpaceInvalidationRect(const nsIntRect& aRect)
{
return aRect;
}
already_AddRefed<imgIContainer>
DynamicImage::Unwrap()
{
nsCOMPtr<imgIContainer> self(this);
return self.forget();
}
void
DynamicImage::PropagateUseCounters(nsIDocument*)
{
// No use counters.
}
} // namespace image
} // namespace mozilla