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* Remove SkAutoTDelete.Gravatar Ben Wagner2016-11-03
| | | | | | | | | Replace with std::unique_ptr. Change-Id: I5806cfbb30515fcb20e5e66ce13fb5f3b8728176 Reviewed-on: https://skia-review.googlesource.com/4381 Commit-Queue: Ben Wagner <bungeman@google.com> Reviewed-by: Mike Klein <mtklein@chromium.org>
* Add support for multiple frames in SkCodecGravatar scroggo2016-10-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add an interface to decode frames beyond the first in SkCodec, and add an implementation for SkGifCodec. Add getFrameData to SkCodec. This method reads ahead in the stream to return a vector containing meta data about each frame in the image. This is not required in order to decode frames beyond the first, but it allows a client to learn extra information: - how long the frame should be displayed - whether a frame should be blended with a prior frame, allowing the client to provide the prior frame to speed up decoding Add a new fields to SkCodec::Options: - fFrameIndex - fHasPriorFrame The API is designed so that SkCodec never caches frames. If a client wants a frame beyond the first, they specify the frame in Options.fFrameIndex. If the client does not have the frame's required frame (the frame that this frame must be blended on top of) cached, they pass false for Options.fHasPriorFrame. Unless the frame is independent, the codec will then recursively decode all frames necessary to decode fFrameIndex. If the client has the required frame cached, they can put it in the dst they pass to the codec, and the codec will only draw fFrameIndex onto it. Replace SkGifCodec's scanline decoding support with progressive decoding, and update the tests accordingly. Implement new APIs in SkGifCodec. Instead of using gif_lib, use GIFImageReader, imported from Chromium (along with its copyright headers) with the following changes: - SkGifCodec is now the client - Replace blink types - Combine GIFColorMap::buildTable and ::getTable into a method that creates and returns an SkColorTable - Input comes from an SkStream, instead of a SegmentReader. Add SkStreamBuffer, which buffers the (potentially partial) stream in order to decode progressively. (FIXME: This requires copying data that previously was read directly from the SegmentReader. Does this hurt performance? If so, can we fix it?) - Remove UMA code - Instead of reporting screen width and height to the client, allow the client to query for it - Fail earlier if the first frame AND screen have size of zero - Compute required previous frame when adding a new one - Move GIFParseQuery from GIFImageDecoder to GIFImageReader - Allow parsing up to a specific frame (to skip parsing the rest of the stream if a client only wants the first frame) - Compute whether the first frame has alpha and supports index 8, to create the SkImageInfo. This happens before reporting that the size has been decoded. Add GIFImageDecoder::haveDecodedRow to SkGifCodec, imported from Chromium (along with its copyright header), with the following changes: - Add support for sampling - Use the swizzler - Keep track of the rows decoded - Do *not* keep track of whether we've seen alpha Remove SkCodec::kOutOfOrder_SkScanlineOrder, which was only used by GIF scanline decoding. Call onRewind even if there is no stream (SkGifCodec needs to clear its decoded state so it will decode from the beginning). Add a method to SkSwizzler to access the offset into the dst, taking subsetting into account. Add a GM that animates a GIF. Add tests for the new APIs. *** Behavior changes: * Previously, we reported that an image with a subset frame and no transparent index was opaque and used the background index (if present) to fill the background. This is necessary in order to support index 8, but it does not match viewers/browsers I have seen. Examples: - Chromium and Gimp render the background transparent - Firefox, Safari, Linux Image Viewer, Safari Preview clip to the frame (for a single frame image) This CL matches Chromium's behavior and renders the background transparent. This allows us to have consistent behavior across products and simplifies the code (relative to what we would have to do to continue the old behavior on Android). It also means that we will no longer support index 8 for some GIFs. * Stop checking for GIFSTAMP - all GIFs should be either 89a or 87a. This matches Chromium. I suspect that bugs would have been reported if valid GIFs started with "GIFVER" instead of "GIF89a" or "GIF87a" (but did not decode in Chromium). *** Future work not included in this CL: * Move some checks out of haveDecodedRow, since they are the same for the entire frame e.g. - intersecting the frameRect with the full image size - whether there is a color table * Change when we write transparent pixels - In some cases, Chromium deemed this unnecessary, but I suspect it is slower than the fallback case. There will continue to be cases where we should *not* write them, but for e.g. the first pass where we have already cleared to transparent (which we may also be able to skip) writing the transparent pixels will not make anything incorrect. * Report color type and alpha type per frame - Depending on alpha values, disposal methods, frame rects, etc, subsequent frames may have different properties than the first. * Skip copies of the encoded data - We copy the encoded data in case the stream is one that cannot be rewound, so we can parse and then decode (possibly not immediately). For some input streams, this is unnecessary. - I was concerned this cause a performance regression, but on average the new code is faster than the old for the images I tested [1]. - It may cause a performance regression for Chromium, though, where we can always move back in the stream, so this should be addressed. Design doc: https://docs.google.com/a/google.com/document/d/12Qhf9T92MWfdWujQwCIjhCO3sw6pTJB5pJBwDM1T7Kc/ [1] https://docs.google.com/a/google.com/spreadsheets/d/19V-t9BfbFw5eiwBTKA1qOBkZbchjlTC5EIz6HFy-6RI/ GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=2045293002 Review-Url: https://codereview.chromium.org/2045293002
* detach -> releaseGravatar mtklein2016-03-16
| | | | | | | | | | | | | The C++ standard library uses the name "release" for the operation we call "detach". Rewriting each "detach(" to "release(" brings us a step closer to using standard library types directly (e.g. std::unique_ptr instead of SkAutoTDelete). This was a fairly blind transformation. There may have been unintentional conversions in here, but it's probably for the best to have everything uniformly say "release". BUG=skia: GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1809733002 Review URL: https://codereview.chromium.org/1809733002
* Fix bug in SkGifCodec / Switch SkImageDec tests to use CodecGravatar msarett2016-03-01
| | | | | | | | | | | | SkImageDecoder is still used throughout tests, tools, gms etc. Deleting it from tests is an easy first step. Bonus is that we add tests of SkCodec. BUG=skia: GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1733863003 Review URL: https://codereview.chromium.org/1733863003
* Add a test for decoding a gif with sampleSize 4.Gravatar scroggo2015-05-14
| | | | | | | | | | | | | Prior to https://codereview.chromium.org/1085253002/, this would crash. Only happens with interlaced gif images with an odd height. (Maybe there are more restrictions?) Test image provided by zoran.jovanovic@sonymobile.com for checking in. Add include before includes. Review URL: https://codereview.chromium.org/1091053002
* Cleanup: Sanitize the order of includes under tests/Gravatar tfarina@chromium.org2014-01-24
| | | | | | | | | | | | | | | | Initially this was to make sure Test.h appeared after the Sk*.h includes. Patch generated by the following command line: $ ~/chromium/src/tools/sort-headers.py tests/*.cpp BUG=None TEST=tests R=robertphillips@google.com Review URL: https://codereview.chromium.org/145313004 git-svn-id: http://skia.googlecode.com/svn/trunk@13177 2bbb7eff-a529-9590-31e7-b0007b416f81
* Remove unnamed namespace usage from tests/Gravatar tfarina@chromium.org2014-01-21
| | | | | | | | | | | | | Skia preference is to use 'static' keyword rather than use unnamed namespace. BUG=None TEST=tests R=robertphillips@google.com, bsalomon@google.com Review URL: https://codereview.chromium.org/132403008 git-svn-id: http://skia.googlecode.com/svn/trunk@13138 2bbb7eff-a529-9590-31e7-b0007b416f81
* Move macros from TestClassDef.h to Test.hGravatar commit-bot@chromium.org2014-01-14
| | | | | | | | | | | | | | Motivation: those macros don't make any sense without the definitions in Test.h. BUG= R=mtklein@google.com Author: halcanary@google.com Review URL: https://codereview.chromium.org/138563004 git-svn-id: http://skia.googlecode.com/svn/trunk@13074 2bbb7eff-a529-9590-31e7-b0007b416f81
* Use DEFINE_TESTCLASS_SHORT macro in tests.Gravatar tfarina@chromium.org2013-12-12
| | | | | | | | | | | | | The three version of DEFINE_TESTCLASS macro is deprecated and thus just use the simple, short one. BUG=None TEST=out/Debug/tests R=mtklein@google.com, bsalomon@google.com, robertphillips@google.com Review URL: https://codereview.chromium.org/100113004 git-svn-id: http://skia.googlecode.com/svn/trunk@12653 2bbb7eff-a529-9590-31e7-b0007b416f81
* GIF decode: optional error messages and fault tolerance.Gravatar halcanary@google.com2013-10-11
Add new runtime configuration variable, images.gif.suppressDecoderWarnings, which suppresses warning and errors from the GIF library. It defaults to "true", which is current behavior. (This setting can be changed by setting the environment variable skia_images_gif_suppressDecoderWarnings="false".) Some conditions which were errors before are now warnings: - If the image width or height is greater than the GIF screen width or height (respectively) we expand the screen to hold the image. - If the offset of the image inside the screen would place the image outside of the screen, we shift the image to fix this. - If the image lacks a color table, we create a default color table. - If the image is truncated, then the rest of the image is filled with the fill color. In all four cases, if images.gif.suppressDecoderWarnings is set to false, then a warning message is printed via SkDebugf. In the event of another kind of error, SkGIFImageDecoder::onDecode() will still return false. But with this change, if images.gif.suppressDecoderWarnings is set to false, a description of the error is printed via SkDebugf. Also, added a new unit test GifTest, which tests the deconing of both good GIf files and corrupted files that should now work with this change. This unit test is disabled on Win32, iOS, and Mac. BUG=skia:1689 R=scroggo@google.com Review URL: https://codereview.chromium.org/26743002 git-svn-id: http://skia.googlecode.com/svn/trunk@11734 2bbb7eff-a529-9590-31e7-b0007b416f81
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