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-rw-r--r--include/codec/SkCodec.h23
-rw-r--r--resources/colorTables.gifbin2829 -> 2829 bytes
-rw-r--r--src/codec/SkCodecAnimation.h44
-rw-r--r--src/codec/SkGifCodec.cpp5
-rw-r--r--src/codec/SkGifCodec.h1
-rw-r--r--tests/CodecAnimTest.cpp32
-rw-r--r--third_party/gif/SkGifImageReader.cpp12
-rw-r--r--third_party/gif/SkGifImageReader.h13
8 files changed, 68 insertions, 62 deletions
diff --git a/include/codec/SkCodec.h b/include/codec/SkCodec.h
index c2519cb840..f2a717c716 100644
--- a/include/codec/SkCodec.h
+++ b/include/codec/SkCodec.h
@@ -607,8 +607,8 @@ public:
/**
* Return info about the frames in the image.
*
- * May require reading through the stream to determine the number of
- * frames.
+ * May require reading through the stream to determine info about the
+ * frames (including the count).
*
* As such, future decoding calls may require a rewind.
*
@@ -618,6 +618,21 @@ public:
return this->onGetFrameInfo();
}
+ static constexpr int kRepetitionCountInfinite = -1;
+
+ /**
+ * Return the number of times to repeat, if this image is animated.
+ *
+ * May require reading the stream to find the repetition count.
+ *
+ * As such, future decoding calls may require a rewind.
+ *
+ * For single-frame images, this will return 0.
+ */
+ int getRepetitionCount() {
+ return this->onGetRepetitionCount();
+ }
+
protected:
/**
* Takes ownership of SkStream*
@@ -766,6 +781,10 @@ protected:
return {};
}
+ virtual int onGetRepetitionCount() {
+ return 0;
+ }
+
/**
* Used for testing with qcms.
* FIXME: Remove this when we are done comparing with qcms.
diff --git a/resources/colorTables.gif b/resources/colorTables.gif
index f25d13cfaa..cefd4120dd 100644
--- a/resources/colorTables.gif
+++ b/resources/colorTables.gif
Binary files differ
diff --git a/src/codec/SkCodecAnimation.h b/src/codec/SkCodecAnimation.h
index d3fc553514..b0495b89ee 100644
--- a/src/codec/SkCodecAnimation.h
+++ b/src/codec/SkCodecAnimation.h
@@ -5,31 +5,6 @@
* found in the LICENSE file.
*/
-/*
- * Copyright (C) 2015 Google Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
#ifndef SkCodecAnimation_DEFINED
#define SkCodecAnimation_DEFINED
@@ -38,25 +13,6 @@
class SkCodecAnimation {
public:
-
- // GIF and WebP support animation. The explanation below is in terms of GIF,
- // but the same constants are used for WebP, too.
- // GIFs have an optional 16-bit unsigned loop count that describes how an
- // animated GIF should be cycled. If the loop count is absent, the animation
- // cycles once; if it is 0, the animation cycles infinitely; otherwise the
- // animation plays n + 1 cycles (where n is the specified loop count). If the
- // GIF decoder defaults to kAnimationLoopOnce in the absence of any loop count
- // and translates an explicit "0" loop count to kAnimationLoopInfinite, then we
- // get a couple of nice side effects:
- // * By making kAnimationLoopOnce be 0, we allow the animation cycling code to
- // avoid special-casing it, and simply treat all non-negative loop counts
- // identically.
- // * By making the other two constants negative, we avoid conflicts with any
- // real loop count values.
- static const int kAnimationLoopOnce = 0;
- static const int kAnimationLoopInfinite = -1;
- static const int kAnimationNone = -2;
-
/**
* This specifies how the next frame is based on this frame.
*
diff --git a/src/codec/SkGifCodec.cpp b/src/codec/SkGifCodec.cpp
index 13223960c8..277da03191 100644
--- a/src/codec/SkGifCodec.cpp
+++ b/src/codec/SkGifCodec.cpp
@@ -139,6 +139,11 @@ std::vector<SkCodec::FrameInfo> SkGifCodec::onGetFrameInfo() {
return result;
}
+int SkGifCodec::onGetRepetitionCount() {
+ fReader->parse(SkGifImageReader::SkGIFLoopCountQuery);
+ return fReader->loopCount();
+}
+
void SkGifCodec::initializeColorTable(const SkImageInfo& dstInfo, size_t frameIndex) {
fCurrColorTable = fReader->getColorTable(dstInfo.colorType(), frameIndex);
fCurrColorTableIsReal = fCurrColorTable;
diff --git a/src/codec/SkGifCodec.h b/src/codec/SkGifCodec.h
index 9d8e0e46bf..5793766204 100644
--- a/src/codec/SkGifCodec.h
+++ b/src/codec/SkGifCodec.h
@@ -49,6 +49,7 @@ protected:
uint64_t onGetFillValue(const SkImageInfo&) const override;
std::vector<FrameInfo> onGetFrameInfo() override;
+ int onGetRepetitionCount() override;
Result onStartIncrementalDecode(const SkImageInfo& /*dstInfo*/, void*, size_t,
const SkCodec::Options&, SkPMColor*, int*) override;
diff --git a/tests/CodecAnimTest.cpp b/tests/CodecAnimTest.cpp
index de36ce65d0..762cd477a7 100644
--- a/tests/CodecAnimTest.cpp
+++ b/tests/CodecAnimTest.cpp
@@ -25,21 +25,23 @@ DEF_TEST(Codec_frames, r) {
// The size of this one should match fFrameCount for animated, empty
// otherwise.
std::vector<size_t> fDurations;
+ int fRepetitionCount;
} gRecs[] = {
- { "box.gif", 1, {}, {} },
- { "color_wheel.gif", 1, {}, {} },
- { "test640x479.gif", 4, { 0, 1, 2 }, { 200, 200, 200, 200 } },
- { "colorTables.gif", 2, { 0 }, { 1000, 1000 } },
-
- { "arrow.png", 1, {}, {} },
- { "google_chrome.ico", 1, {}, {} },
- { "brickwork-texture.jpg", 1, {}, {} },
+ { "box.gif", 1, {}, {}, 0 },
+ { "color_wheel.gif", 1, {}, {}, 0 },
+ { "test640x479.gif", 4, { 0, 1, 2 }, { 200, 200, 200, 200 },
+ SkCodec::kRepetitionCountInfinite },
+ { "colorTables.gif", 2, { 0 }, { 1000, 1000 }, 5 },
+
+ { "arrow.png", 1, {}, {}, 0 },
+ { "google_chrome.ico", 1, {}, {}, 0 },
+ { "brickwork-texture.jpg", 1, {}, {}, 0 },
#if defined(SK_CODEC_DECODES_RAW) && (!defined(_WIN32))
- { "dng_with_preview.dng", 1, {}, {} },
+ { "dng_with_preview.dng", 1, {}, {}, 0 },
#endif
- { "mandrill.wbmp", 1, {}, {} },
- { "randPixels.bmp", 1, {}, {} },
- { "yellow_rose.webp", 1, {}, {} },
+ { "mandrill.wbmp", 1, {}, {}, 0 },
+ { "randPixels.bmp", 1, {}, {}, 0 },
+ { "yellow_rose.webp", 1, {}, {}, 0 },
};
for (auto rec : gRecs) {
@@ -57,6 +59,12 @@ DEF_TEST(Codec_frames, r) {
continue;
}
+ const int repetitionCount = codec->getRepetitionCount();
+ if (repetitionCount != rec.fRepetitionCount) {
+ ERRORF(r, "%s repetition count does not match! expected: %i\tactual: %i",
+ rec.fName, rec.fRepetitionCount, repetitionCount);
+ }
+
const size_t expected = rec.fFrameCount;
const auto frameInfos = codec->getFrameInfo();
// getFrameInfo returns empty set for non-animated.
diff --git a/third_party/gif/SkGifImageReader.cpp b/third_party/gif/SkGifImageReader.cpp
index bbf5f9a2f0..0ffc7ca72a 100644
--- a/third_party/gif/SkGifImageReader.cpp
+++ b/third_party/gif/SkGifImageReader.cpp
@@ -415,6 +415,11 @@ bool SkGifImageReader::parse(SkGifImageReader::SkGIFParseQuery query)
return true;
}
+ if (SkGIFLoopCountQuery == query && m_loopCount != cLoopCountNotSeen) {
+ // Loop count has already been parsed.
+ return true;
+ }
+
// SkGIFSizeQuery and SkGIFFrameCountQuery are negative, so this is only meaningful when >= 0.
const int lastFrameToParse = (int) query;
if (lastFrameToParse >= 0 && (int) m_frames.size() > lastFrameToParse
@@ -664,9 +669,14 @@ bool SkGifImageReader::parse(SkGifImageReader::SkGIFParseQuery query)
// Zero loop count is infinite animation loop request.
if (!m_loopCount)
- m_loopCount = SkCodecAnimation::kAnimationLoopInfinite;
+ m_loopCount = SkCodec::kRepetitionCountInfinite;
GETN(1, SkGIFNetscapeExtensionBlock);
+
+ if (SkGIFLoopCountQuery == query) {
+ m_streamBuffer.flush();
+ return true;
+ }
} else if (netscapeExtension == 2) {
// Wait for specified # of bytes to enter buffer.
diff --git a/third_party/gif/SkGifImageReader.h b/third_party/gif/SkGifImageReader.h
index 5936350681..2b1b2d9423 100644
--- a/third_party/gif/SkGifImageReader.h
+++ b/third_party/gif/SkGifImageReader.h
@@ -298,8 +298,6 @@ public:
{
}
- static constexpr int cLoopCountNotSeen = -2;
-
~SkGifImageReader()
{
}
@@ -317,6 +315,8 @@ public:
SkGIFSizeQuery = -1,
// Parse to the end, so we know about all frames.
SkGIFFrameCountQuery = -2,
+ // Parse until we see the loop count.
+ SkGIFLoopCountQuery = -3,
};
// Parse incoming GIF data stream into internal data structures.
@@ -340,7 +340,12 @@ public:
// FIXME: This extra complexity is not necessary and we should just report m_frames.size().
return m_frames.back()->isHeaderDefined() ? m_frames.size() : m_frames.size() - 1;
}
- int loopCount() const { return m_loopCount; }
+ int loopCount() const {
+ if (cLoopCountNotSeen == m_loopCount) {
+ return 0;
+ }
+ return m_loopCount;
+ }
const SkGIFColorMap& globalColorMap() const
{
@@ -389,6 +394,8 @@ private:
unsigned m_screenWidth; // Logical screen width & height.
unsigned m_screenHeight;
SkGIFColorMap m_globalColorMap;
+
+ static constexpr int cLoopCountNotSeen = -2;
int m_loopCount; // Netscape specific extension block to control the number of animation loops a GIF renders.
std::vector<std::unique_ptr<SkGIFFrameContext>> m_frames;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-04 15:38:47 +0000