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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 /image/decoders/nsIconDecoder.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 'image/decoders/nsIconDecoder.cpp')
-rw-r--r--image/decoders/nsIconDecoder.cpp125
1 files changed, 125 insertions, 0 deletions
diff --git a/image/decoders/nsIconDecoder.cpp b/image/decoders/nsIconDecoder.cpp
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+++ b/image/decoders/nsIconDecoder.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 "nsIconDecoder.h"
+#include "RasterImage.h"
+#include "SurfacePipeFactory.h"
+#include "gfxPlatform.h"
+
+using namespace mozilla::gfx;
+
+namespace mozilla {
+namespace image {
+
+static const uint32_t ICON_HEADER_SIZE = 4;
+
+nsIconDecoder::nsIconDecoder(RasterImage* aImage)
+ : Decoder(aImage),
+ mLexer(Transition::To(State::HEADER, ICON_HEADER_SIZE),
+ Transition::TerminateSuccess()),
+ mBytesPerRow() // set by ReadHeader()
+{
+ // Nothing to do
+}
+
+nsIconDecoder::~nsIconDecoder() {}
+
+LexerResult nsIconDecoder::DoDecode(SourceBufferIterator& aIterator,
+ IResumable* aOnResume) {
+ MOZ_ASSERT(!HasError(), "Shouldn't call DoDecode after error!");
+
+ return mLexer.Lex(aIterator, aOnResume,
+ [=](State aState, const char* aData, size_t aLength) {
+ switch (aState) {
+ case State::HEADER:
+ return ReadHeader(aData);
+ case State::ROW_OF_PIXELS:
+ return ReadRowOfPixels(aData, aLength);
+ case State::FINISH:
+ return Finish();
+ default:
+ MOZ_CRASH("Unknown State");
+ }
+ });
+}
+
+LexerTransition<nsIconDecoder::State> nsIconDecoder::ReadHeader(
+ const char* aData) {
+ // Grab the width and height.
+ uint8_t width = uint8_t(aData[0]);
+ uint8_t height = uint8_t(aData[1]);
+ SurfaceFormat format = SurfaceFormat(aData[2]);
+ bool transform = bool(aData[3]);
+
+ // FIXME(aosmond): On OSX we get the icon in device space and already
+ // premultiplied, so we can't support the surface flags with icons right now.
+ SurfacePipeFlags pipeFlags = SurfacePipeFlags();
+ if (transform) {
+ if (mCMSMode == CMSMode::All) {
+ mTransform = GetCMSsRGBTransform(format);
+ }
+
+ if (!(GetSurfaceFlags() & SurfaceFlags::NO_PREMULTIPLY_ALPHA)) {
+ pipeFlags |= SurfacePipeFlags::PREMULTIPLY_ALPHA;
+ }
+ }
+
+ // The input is 32bpp, so we expect 4 bytes of data per pixel.
+ mBytesPerRow = width * 4;
+
+ // Post our size to the superclass.
+ PostSize(width, height);
+
+ // Icons have alpha.
+ PostHasTransparency();
+
+ // If we're doing a metadata decode, we're done.
+ if (IsMetadataDecode()) {
+ return Transition::TerminateSuccess();
+ }
+
+ MOZ_ASSERT(!mImageData, "Already have a buffer allocated?");
+ Maybe<SurfacePipe> pipe = SurfacePipeFactory::CreateSurfacePipe(
+ this, Size(), OutputSize(), FullFrame(), format, SurfaceFormat::OS_RGBA,
+ /* aAnimParams */ Nothing(), mTransform, pipeFlags);
+ if (!pipe) {
+ return Transition::TerminateFailure();
+ }
+
+ mPipe = std::move(*pipe);
+
+ MOZ_ASSERT(mImageData, "Should have a buffer now");
+
+ return Transition::To(State::ROW_OF_PIXELS, mBytesPerRow);
+}
+
+LexerTransition<nsIconDecoder::State> nsIconDecoder::ReadRowOfPixels(
+ const char* aData, size_t aLength) {
+ MOZ_ASSERT(aLength % 4 == 0, "Rows should contain a multiple of four bytes");
+
+ auto result = mPipe.WriteBuffer(reinterpret_cast<const uint32_t*>(aData));
+ MOZ_ASSERT(result != WriteState::FAILURE);
+
+ Maybe<SurfaceInvalidRect> invalidRect = mPipe.TakeInvalidRect();
+ if (invalidRect) {
+ PostInvalidation(invalidRect->mInputSpaceRect,
+ Some(invalidRect->mOutputSpaceRect));
+ }
+
+ return result == WriteState::FINISHED
+ ? Transition::To(State::FINISH, 0)
+ : Transition::To(State::ROW_OF_PIXELS, mBytesPerRow);
+}
+
+LexerTransition<nsIconDecoder::State> nsIconDecoder::Finish() {
+ PostFrameStop();
+ PostDecodeDone();
+
+ return Transition::TerminateSuccess();
+}
+
+} // namespace image
+} // namespace mozilla