2010-08-23 02:30:45 +00:00
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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2012-05-21 11:12:37 +00:00
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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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2010-08-23 02:30:45 +00:00
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2015-05-15 03:52:05 +00:00
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#ifndef mozilla_image_Decoder_h
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#define mozilla_image_Decoder_h
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2010-08-23 02:30:45 +00:00
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2015-01-07 21:07:23 +00:00
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#include "FrameAnimator.h"
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2010-08-23 02:30:45 +00:00
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#include "RasterImage.h"
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2015-10-18 05:24:48 +00:00
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#include "mozilla/RefPtr.h"
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2014-11-19 02:17:17 +00:00
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#include "DecodePool.h"
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2015-08-15 00:56:44 +00:00
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#include "DecoderFlags.h"
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2015-09-19 23:21:08 +00:00
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#include "Downscaler.h"
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2012-12-20 16:49:25 +00:00
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#include "ImageMetadata.h"
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2013-08-25 07:19:42 +00:00
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#include "Orientation.h"
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2015-01-15 23:11:36 +00:00
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#include "SourceBuffer.h"
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2015-08-15 00:56:44 +00:00
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#include "SurfaceFlags.h"
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2010-08-23 02:30:45 +00:00
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namespace mozilla {
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2014-06-19 02:29:00 +00:00
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2015-02-03 15:05:49 +00:00
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namespace Telemetry {
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enum ID : uint32_t;
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2015-07-13 15:25:42 +00:00
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} // namespace Telemetry
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2015-02-03 15:05:49 +00:00
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2012-01-06 16:02:27 +00:00
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namespace image {
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2010-08-23 02:30:45 +00:00
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2015-01-15 23:11:36 +00:00
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class Decoder : public IResumable
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2010-08-23 02:30:45 +00:00
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{
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public:
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2015-01-15 23:11:35 +00:00
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explicit Decoder(RasterImage* aImage);
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2010-08-23 02:30:45 +00:00
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/**
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2010-08-23 02:30:46 +00:00
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* Initialize an image decoder. Decoders may not be re-initialized.
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2010-08-23 02:30:45 +00:00
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*/
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2011-09-27 16:24:03 +00:00
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void Init();
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2010-08-23 02:30:45 +00:00
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2015-01-11 19:43:32 +00:00
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/**
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2015-08-19 21:04:01 +00:00
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* Decodes, reading all data currently available in the SourceBuffer.
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*
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* If more data is needed, Decode() will schedule @aOnResume to be called when
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* more data is available. If @aOnResume is null or unspecified, the default
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* implementation resumes decoding on a DecodePool thread. Most callers should
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* use the default implementation.
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2010-08-23 02:30:45 +00:00
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*
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* Any errors are reported by setting the appropriate state on the decoder.
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*/
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2015-08-19 21:04:01 +00:00
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nsresult Decode(IResumable* aOnResume = nullptr);
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2015-01-12 09:20:23 +00:00
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2015-01-15 23:11:36 +00:00
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/**
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* Given a maximum number of bytes we're willing to decode, @aByteLimit,
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* returns true if we should attempt to run this decoder synchronously.
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2015-01-11 13:34:20 +00:00
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*/
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2015-01-15 23:11:36 +00:00
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bool ShouldSyncDecode(size_t aByteLimit);
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2015-01-11 13:34:20 +00:00
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2010-08-24 20:40:45 +00:00
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/**
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2014-11-10 20:37:35 +00:00
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* Gets the invalidation region accumulated by the decoder so far, and clears
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* the decoder's invalidation region. This means that each call to
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* TakeInvalidRect() returns only the invalidation region accumulated since
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* the last call to TakeInvalidRect().
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2010-08-24 20:40:45 +00:00
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*/
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2014-11-10 20:37:35 +00:00
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nsIntRect TakeInvalidRect()
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{
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nsIntRect invalidRect = mInvalidRect;
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mInvalidRect.SetEmpty();
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return invalidRect;
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}
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2010-08-24 20:40:45 +00:00
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2014-11-18 09:48:49 +00:00
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/**
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* Gets the progress changes accumulated by the decoder so far, and clears
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* them. This means that each call to TakeProgress() returns only the changes
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* accumulated since the last call to TakeProgress().
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*/
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Progress TakeProgress()
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{
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Progress progress = mProgress;
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mProgress = NoProgress;
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return progress;
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}
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2015-01-15 23:11:36 +00:00
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/**
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* Returns true if there's any progress to report.
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*/
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bool HasProgress() const
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{
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return mProgress != NoProgress || !mInvalidRect.IsEmpty();
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}
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2010-08-23 02:30:45 +00:00
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// We're not COM-y, so we don't get refcounts by default
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2015-03-21 16:28:04 +00:00
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NS_INLINE_DECL_THREADSAFE_REFCOUNTING(Decoder, override)
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2010-08-23 02:30:45 +00:00
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2015-01-15 23:11:36 +00:00
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// Implement IResumable.
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2015-03-21 16:28:04 +00:00
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virtual void Resume() override;
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2015-01-15 23:11:36 +00:00
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2010-08-23 02:30:46 +00:00
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/*
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* State.
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*/
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2015-07-23 05:39:54 +00:00
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/**
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* If we're doing a metadata decode, we only decode the image's headers, which
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* is enough to determine the image's intrinsic size. A metadata decode is
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* enabled by calling SetMetadataDecode() *before* calling Init().
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*/
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void SetMetadataDecode(bool aMetadataDecode)
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2010-08-23 02:30:46 +00:00
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{
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2015-01-15 23:11:36 +00:00
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MOZ_ASSERT(!mInitialized, "Shouldn't be initialized yet");
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2015-07-23 05:39:54 +00:00
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mMetadataDecode = aMetadataDecode;
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2010-08-23 02:30:46 +00:00
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}
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2015-07-31 14:29:15 +00:00
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bool IsMetadataDecode() const { return mMetadataDecode; }
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2010-08-23 02:30:46 +00:00
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2015-01-18 22:02:13 +00:00
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/**
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* If this decoder supports downscale-during-decode, sets the target size that
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* this image should be decoded to.
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*
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2015-09-19 23:21:08 +00:00
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* If the provided size is unacceptable, an error is returned.
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2015-01-18 22:02:13 +00:00
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*
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* Returning NS_OK from this method is a promise that the decoder will decode
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* the image to the requested target size unless it encounters an error.
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*
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* This must be called before Init() is called.
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*/
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2015-09-19 23:21:08 +00:00
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nsresult SetTargetSize(const nsIntSize& aSize);
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2015-01-18 22:02:13 +00:00
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2015-07-31 14:29:03 +00:00
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/**
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* Set the requested sample size for this decoder. Used to implement the
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* -moz-sample-size media fragment.
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*
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* XXX(seth): Support for -moz-sample-size will be removed in bug 1120056.
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*/
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virtual void SetSampleSize(int aSampleSize) { }
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2015-01-15 23:11:36 +00:00
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/**
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* Set an iterator to the SourceBuffer which will feed data to this decoder.
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*
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* This should be called for almost all decoders; the exceptions are the
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* contained decoders of an nsICODecoder, which will be fed manually via Write
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* instead.
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*
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* This must be called before Init() is called.
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*/
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void SetIterator(SourceBufferIterator&& aIterator)
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{
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MOZ_ASSERT(!mInitialized, "Shouldn't be initialized yet");
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mIterator.emplace(Move(aIterator));
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}
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/**
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2015-08-15 00:56:44 +00:00
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* Should this decoder send partial invalidations?
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2015-01-15 23:11:36 +00:00
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*/
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2015-08-15 00:56:44 +00:00
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bool ShouldSendPartialInvalidations() const
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2015-01-15 23:11:36 +00:00
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{
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2015-08-15 00:56:44 +00:00
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return !(mDecoderFlags & DecoderFlags::IS_REDECODE);
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2015-01-15 23:11:36 +00:00
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}
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2015-08-01 01:10:23 +00:00
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/**
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2015-08-15 00:56:44 +00:00
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* Should we stop decoding after the first frame?
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2015-08-01 01:10:23 +00:00
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*/
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2015-08-15 00:56:44 +00:00
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bool IsFirstFrameDecode() const
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2015-08-01 01:10:23 +00:00
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{
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2015-08-15 00:56:44 +00:00
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return bool(mDecoderFlags & DecoderFlags::FIRST_FRAME_ONLY);
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2015-08-01 01:10:23 +00:00
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}
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2014-10-15 20:52:20 +00:00
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size_t BytesDecoded() const { return mBytesDecoded; }
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2014-11-18 20:06:26 +00:00
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// The amount of time we've spent inside Write() so far for this decoder.
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TimeDuration DecodeTime() const { return mDecodeTime; }
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// The number of times Write() has been called so far for this decoder.
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uint32_t ChunkCount() const { return mChunkCount; }
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2010-08-23 02:30:46 +00:00
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// The number of frames we have, including anything in-progress. Thus, this
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// is only 0 if we haven't begun any frames.
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2012-08-22 15:56:38 +00:00
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uint32_t GetFrameCount() { return mFrameCount; }
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2010-08-23 02:30:46 +00:00
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2015-02-11 00:47:00 +00:00
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// The number of complete frames we have (ie, not including anything
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// in-progress).
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uint32_t GetCompleteFrameCount() {
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return mInFrame ? mFrameCount - 1 : mFrameCount;
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}
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2010-09-12 15:22:30 +00:00
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2015-07-31 14:29:15 +00:00
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// Did we discover that the image we're decoding is animated?
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2015-08-14 07:37:13 +00:00
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bool HasAnimation() const { return mImageMetadata.HasAnimation(); }
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2015-07-31 14:29:15 +00:00
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2010-09-12 15:22:27 +00:00
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// Error tracking
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2015-01-15 23:11:36 +00:00
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bool HasError() const { return HasDataError() || HasDecoderError(); }
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bool HasDataError() const { return mDataError; }
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bool HasDecoderError() const { return NS_FAILED(mFailCode); }
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2015-07-31 14:29:15 +00:00
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bool ShouldReportError() const { return mShouldReportError; }
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2015-01-15 23:11:36 +00:00
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nsresult GetDecoderError() const { return mFailCode; }
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2015-07-31 14:29:15 +00:00
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/// Did we finish decoding enough that calling Decode() again would be useless?
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2015-01-15 23:11:36 +00:00
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bool GetDecodeDone() const
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{
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2015-07-23 05:39:54 +00:00
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return mDecodeDone || (mMetadataDecode && HasSize()) ||
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HasError() || mDataDone;
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2011-08-25 20:09:01 +00:00
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}
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2010-09-12 15:22:27 +00:00
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2015-07-31 14:29:15 +00:00
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/// Are we in the middle of a frame right now? Used for assertions only.
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bool InFrame() const { return mInFrame; }
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2015-07-31 14:29:18 +00:00
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/// Should we store surfaces created by this decoder in the SurfaceCache?
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bool ShouldUseSurfaceCache() const { return bool(mImage); }
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2015-01-15 23:11:36 +00:00
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/**
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* Returns true if this decoder was aborted.
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*
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* This may happen due to a low-memory condition, or because another decoder
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* was racing with this one to decode the same frames with the same flags and
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* this decoder lost the race. Either way, this is not a permanent situation
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* and does not constitute an error, so we don't report any errors when this
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* happens.
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*/
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bool WasAborted() const { return mDecodeAborted; }
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2012-11-19 01:18:52 +00:00
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enum DecodeStyle {
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2015-02-11 00:47:00 +00:00
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PROGRESSIVE, // produce intermediate frames representing the partial
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// state of the image
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SEQUENTIAL // decode to final image immediately
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2012-11-19 01:18:52 +00:00
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};
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2015-08-15 00:56:44 +00:00
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/**
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* Get or set the DecoderFlags that influence the behavior of this decoder.
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*/
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void SetDecoderFlags(DecoderFlags aDecoderFlags)
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{
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MOZ_ASSERT(!mInitialized);
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mDecoderFlags = aDecoderFlags;
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}
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DecoderFlags GetDecoderFlags() const { return mDecoderFlags; }
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/**
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* Get or set the SurfaceFlags that select the kind of output this decoder
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* will produce.
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*/
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void SetSurfaceFlags(SurfaceFlags aSurfaceFlags)
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{
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MOZ_ASSERT(!mInitialized);
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mSurfaceFlags = aSurfaceFlags;
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}
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SurfaceFlags GetSurfaceFlags() const { return mSurfaceFlags; }
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2011-01-13 01:45:13 +00:00
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2013-02-27 19:23:08 +00:00
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bool HasSize() const { return mImageMetadata.HasSize(); }
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2015-01-18 22:02:13 +00:00
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nsIntSize GetSize() const
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{
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MOZ_ASSERT(HasSize());
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return mImageMetadata.GetSize();
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}
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2015-02-03 15:05:49 +00:00
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virtual Telemetry::ID SpeedHistogram();
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2011-09-22 20:25:56 +00:00
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2013-01-18 21:47:18 +00:00
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ImageMetadata& GetImageMetadata() { return mImageMetadata; }
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2015-01-15 23:11:35 +00:00
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/**
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* Returns a weak pointer to the image associated with this decoder.
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*/
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RasterImage* GetImage() const { MOZ_ASSERT(mImage); return mImage.get(); }
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2014-11-26 21:22:10 +00:00
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RawAccessFrameRef GetCurrentFrameRef()
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{
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2014-12-03 18:02:19 +00:00
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return mCurrentFrame ? mCurrentFrame->RawAccessRef()
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: RawAccessFrameRef();
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2014-11-26 21:22:10 +00:00
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}
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2015-01-15 23:11:36 +00:00
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/**
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* Writes data to the decoder. Only public for the benefit of nsICODecoder;
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* other callers should use Decode().
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*
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* @param aBuffer buffer containing the data to be written
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* @param aCount the number of bytes to write
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*
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* Any errors are reported by setting the appropriate state on the decoder.
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*/
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void Write(const char* aBuffer, uint32_t aCount);
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2010-08-23 02:30:45 +00:00
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protected:
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2015-07-11 02:26:15 +00:00
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friend class nsICODecoder;
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2014-09-10 02:47:02 +00:00
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virtual ~Decoder();
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2010-08-23 02:30:45 +00:00
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/*
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* Internal hooks. Decoder implementations may override these and
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* only these methods.
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*/
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2010-09-12 15:22:30 +00:00
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virtual void InitInternal();
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2015-07-23 05:39:56 +00:00
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virtual void WriteInternal(const char* aBuffer, uint32_t aCount) = 0;
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2010-09-12 15:22:30 +00:00
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virtual void FinishInternal();
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2015-07-11 02:26:15 +00:00
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virtual void FinishWithErrorInternal();
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2010-08-23 02:30:45 +00:00
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2010-08-23 02:30:46 +00:00
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/*
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* Progress notifications.
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*/
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// Called by decoders when they determine the size of the image. Informs
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// the image of its size and sends notifications.
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2013-08-25 07:19:42 +00:00
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void PostSize(int32_t aWidth,
|
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|
|
int32_t aHeight,
|
|
|
|
Orientation aOrientation = Orientation());
|
2010-08-23 02:30:46 +00:00
|
|
|
|
2014-11-17 19:16:45 +00:00
|
|
|
// Called by decoders if they determine that the image has transparency.
|
2014-11-25 07:42:43 +00:00
|
|
|
//
|
|
|
|
// This should be fired as early as possible to allow observers to do things
|
2014-11-25 08:00:00 +00:00
|
|
|
// that affect content, so it's necessarily pessimistic - if there's a
|
|
|
|
// possibility that the image has transparency, for example because its header
|
|
|
|
// specifies that it has an alpha channel, we fire PostHasTransparency
|
2015-01-07 21:07:23 +00:00
|
|
|
// immediately. PostFrameStop's aFrameOpacity argument, on the other hand, is
|
2014-11-25 08:00:00 +00:00
|
|
|
// only used internally to ImageLib. Because PostFrameStop isn't delivered
|
|
|
|
// until the entire frame has been decoded, decoders may take into account the
|
|
|
|
// actual contents of the frame and give a more accurate result.
|
2014-11-17 19:16:45 +00:00
|
|
|
void PostHasTransparency();
|
|
|
|
|
2015-08-14 07:37:13 +00:00
|
|
|
// Called by decoders if they determine that the image is animated.
|
|
|
|
//
|
|
|
|
// @param aTimeout The time for which the first frame should be shown before
|
|
|
|
// we advance to the next frame.
|
|
|
|
void PostIsAnimated(int32_t aFirstFrameTimeout);
|
2012-12-19 20:11:42 +00:00
|
|
|
|
|
|
|
// Called by decoders when they end a frame. Informs the image, sends
|
|
|
|
// notifications, and does internal book-keeping.
|
|
|
|
// Specify whether this frame is opaque as an optimization.
|
|
|
|
// For animated images, specify the disposal, blend method and timeout for
|
|
|
|
// this frame.
|
2015-01-07 21:07:23 +00:00
|
|
|
void PostFrameStop(Opacity aFrameOpacity = Opacity::SOME_TRANSPARENCY,
|
|
|
|
DisposalMethod aDisposalMethod = DisposalMethod::KEEP,
|
2012-12-19 20:11:42 +00:00
|
|
|
int32_t aTimeout = 0,
|
2015-01-07 21:07:23 +00:00
|
|
|
BlendMethod aBlendMethod = BlendMethod::OVER);
|
2010-08-23 02:30:46 +00:00
|
|
|
|
2015-01-18 22:02:13 +00:00
|
|
|
/**
|
|
|
|
* Called by the decoders when they have a region to invalidate. We may not
|
|
|
|
* actually pass these invalidations on right away.
|
|
|
|
*
|
|
|
|
* @param aRect The invalidation rect in the coordinate system of the unscaled
|
|
|
|
* image (that is, the image at its intrinsic size).
|
|
|
|
* @param aRectAtTargetSize If not Nothing(), the invalidation rect in the
|
|
|
|
* coordinate system of the scaled image (that is,
|
|
|
|
* the image at our target decoding size). This must
|
|
|
|
* be supplied if we're downscaling during decode.
|
|
|
|
*/
|
|
|
|
void PostInvalidation(const nsIntRect& aRect,
|
|
|
|
const Maybe<nsIntRect>& aRectAtTargetSize = Nothing());
|
2010-08-23 02:30:46 +00:00
|
|
|
|
2010-09-12 15:22:30 +00:00
|
|
|
// Called by the decoders when they have successfully decoded the image. This
|
|
|
|
// may occur as the result of the decoder getting to the appropriate point in
|
|
|
|
// the stream, or by us calling FinishInternal().
|
|
|
|
//
|
|
|
|
// May not be called mid-frame.
|
2012-12-19 20:11:42 +00:00
|
|
|
//
|
|
|
|
// For animated images, specify the loop count. -1 means loop forever, 0
|
|
|
|
// means a single iteration, stopping on the last frame.
|
|
|
|
void PostDecodeDone(int32_t aLoopCount = 0);
|
2010-09-12 15:22:30 +00:00
|
|
|
|
2010-09-12 15:22:27 +00:00
|
|
|
// Data errors are the fault of the source data, decoder errors are our fault
|
|
|
|
void PostDataError();
|
|
|
|
void PostDecoderError(nsresult aFailCode);
|
|
|
|
|
2015-01-27 06:53:20 +00:00
|
|
|
/**
|
|
|
|
* CompleteDecode() finishes up the decoding process after Decode() determines
|
|
|
|
* that we're finished. It records final progress and does all the cleanup
|
|
|
|
* that's possible off-main-thread.
|
|
|
|
*/
|
|
|
|
void CompleteDecode();
|
|
|
|
|
2015-01-11 13:34:20 +00:00
|
|
|
/**
|
2015-07-11 02:26:15 +00:00
|
|
|
* Allocates a new frame, making it our current frame if successful.
|
|
|
|
*
|
|
|
|
* The @aFrameNum parameter only exists as a sanity check; it's illegal to
|
|
|
|
* create a new frame anywhere but immediately after the existing frames.
|
2015-01-18 22:02:14 +00:00
|
|
|
*
|
2015-01-11 19:43:32 +00:00
|
|
|
* If a non-paletted frame is desired, pass 0 for aPaletteDepth.
|
2015-01-11 13:34:20 +00:00
|
|
|
*/
|
2015-07-11 02:26:15 +00:00
|
|
|
nsresult AllocateFrame(uint32_t aFrameNum,
|
|
|
|
const nsIntSize& aTargetSize,
|
|
|
|
const nsIntRect& aFrameRect,
|
|
|
|
gfx::SurfaceFormat aFormat,
|
|
|
|
uint8_t aPaletteDepth = 0);
|
|
|
|
|
|
|
|
/// Helper method for decoders which only have 'basic' frame allocation needs.
|
|
|
|
nsresult AllocateBasicFrame() {
|
|
|
|
nsIntSize size = GetSize();
|
|
|
|
return AllocateFrame(0, size, nsIntRect(nsIntPoint(), size),
|
|
|
|
gfx::SurfaceFormat::B8G8R8A8);
|
|
|
|
}
|
|
|
|
|
|
|
|
RawAccessFrameRef AllocateFrameInternal(uint32_t aFrameNum,
|
|
|
|
const nsIntSize& aTargetSize,
|
|
|
|
const nsIntRect& aFrameRect,
|
|
|
|
gfx::SurfaceFormat aFormat,
|
|
|
|
uint8_t aPaletteDepth,
|
|
|
|
imgFrame* aPreviousFrame);
|
2015-01-15 23:11:36 +00:00
|
|
|
|
2015-07-31 14:29:00 +00:00
|
|
|
protected:
|
2015-09-19 23:21:08 +00:00
|
|
|
Maybe<Downscaler> mDownscaler;
|
|
|
|
|
2015-07-31 14:29:00 +00:00
|
|
|
uint8_t* mImageData; // Pointer to image data in either Cairo or 8bit format
|
|
|
|
uint32_t mImageDataLength;
|
|
|
|
uint32_t* mColormap; // Current colormap to be used in Cairo format
|
|
|
|
uint32_t mColormapSize;
|
|
|
|
|
|
|
|
private:
|
2015-10-18 05:24:48 +00:00
|
|
|
RefPtr<RasterImage> mImage;
|
2015-01-15 23:11:36 +00:00
|
|
|
Maybe<SourceBufferIterator> mIterator;
|
2014-11-26 21:22:10 +00:00
|
|
|
RawAccessFrameRef mCurrentFrame;
|
2012-12-20 16:49:25 +00:00
|
|
|
ImageMetadata mImageMetadata;
|
2014-11-18 09:48:48 +00:00
|
|
|
nsIntRect mInvalidRect; // Tracks an invalidation region in the current frame.
|
2014-11-15 04:10:47 +00:00
|
|
|
Progress mProgress;
|
2010-09-12 15:22:30 +00:00
|
|
|
|
2015-07-31 14:29:00 +00:00
|
|
|
uint32_t mFrameCount; // Number of frames, including anything in-progress
|
|
|
|
|
|
|
|
nsresult mFailCode;
|
2013-01-28 17:26:36 +00:00
|
|
|
|
2014-11-18 20:06:26 +00:00
|
|
|
// Telemetry data for this decoder.
|
|
|
|
TimeDuration mDecodeTime;
|
|
|
|
uint32_t mChunkCount;
|
|
|
|
|
2015-08-15 00:56:44 +00:00
|
|
|
DecoderFlags mDecoderFlags;
|
|
|
|
SurfaceFlags mSurfaceFlags;
|
2014-10-15 20:52:20 +00:00
|
|
|
size_t mBytesDecoded;
|
2010-09-12 15:22:27 +00:00
|
|
|
|
2015-07-31 14:29:00 +00:00
|
|
|
bool mInitialized : 1;
|
|
|
|
bool mMetadataDecode : 1;
|
|
|
|
bool mInFrame : 1;
|
|
|
|
bool mDataDone : 1;
|
|
|
|
bool mDecodeDone : 1;
|
|
|
|
bool mDataError : 1;
|
|
|
|
bool mDecodeAborted : 1;
|
|
|
|
bool mShouldReportError : 1;
|
2013-11-21 01:21:51 +00:00
|
|
|
};
|
|
|
|
|
2012-01-06 16:02:27 +00:00
|
|
|
} // namespace image
|
2010-08-23 02:30:45 +00:00
|
|
|
} // namespace mozilla
|
|
|
|
|
2015-05-15 03:52:05 +00:00
|
|
|
#endif // mozilla_image_Decoder_h
|