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  9. 05 Dec, 2013 1 commit
    • halcanary@google.com's avatar
      Big Cleanup: SkBitmapFactory, SkLazyPixelRef, SkImageCache · 2c7c7ee4
      halcanary@google.com authored 
      Removed SkBitmapFactory since no clients were using it.  New cache
selection mechanism can simply pass a SkDiscardableMemory::Factory
into the SkDiscardablePixelRef if non-default SkDiscardableMemory
should be used.  Removed BitmapFactoryTest.

SkDiscardableMemory::Factory interface.  Android will need this
functionality in the future inside their BitmapFactory.

Removed SkLazyPixelRef, since it's functionality is now subsumed into
SkDiscardablePixelRef.  Removed LazyPixelRef test.

Modified SkDiscardablePixelRef to optionally allow it to use a
SkDiscardableMemory::Factory.  This tiny change makes it a replacement
for SkLazyPixelRef.  This functioanlity is also necessary for moving
Android over to SkDiscardablePixelRef from SkImageRef in a later CL.
Added a test for this.

SkDecodingImageGenerator::Install can optionally pass a factory in to
SkDiscardablePixelRef.

Removed SkImageCache, SkLruImageCache, and SkPurgeableImageCache.
This functionality can be handled much more cleanly by
SkDiscardableMemory.

New SkDiscardableMemoryPool class to replace SkLruImageCache.  In a
later CL, we will replace SkImageRef_GlobalPool (used by android) as
well.  This is a concrete implementation of
SkDiscardableMemory::Factory.  Added a test for this.

modified gm/factory.cpp to remove dependnce on SkBitmapFactory +
SkLruImageCache.  Now uses SkDecodingImageGenerator +
SkDiscardablePixelRef + SkDiscardableMemoryPool.

SkImageDecoder::Target replaces SkBitmapFactory::Target.  The
DecodeMemoryToTarget function may disappear in the future.

Moved SkLazyCachingPixelRef::DecodeProc replaces
SkBitmapFactory::DecodeProc.  This is a short term change, since
another CL changes SkLazyCachingPixelRef to use SkImageGenerator
instead of DecodeProc.

Modified DrawBitmapRectTest to use SkDiscardablePixelRef instead of
SkLazyPixelRef.

tools/LazyDecodeBitmap.cpp now uses SkDecodingImageGenerator +
SkDiscardablePixelRef instead of a SkBitmapFactory.

bench_pictures uses the Global SkDiscardableMemoryPool instead of a
global gLruImageCache.

R=reed@google.com, scroggo@google.com

Review URL: https://codereview.chromium.org/103033002

git-svn-id: http://skia.googlecode.com/svn/trunk@12515 2bbb7eff-a529-9590-31e7-b0007b416f81
      2c7c7ee4
  11. 02 Dec, 2013 1 commit
  13. 12 Nov, 2013 1 commit
  15. 04 Oct, 2013 1 commit
    • halcanary@google.com's avatar
      Make image decoding more fault resistant, less verbose. · fed30372
      halcanary@google.com authored 
      This change address what happens when a jpeg is partially downloaded
before failing.  Many browsers will render it anyway: we want Skia to
do the same.  The JpegTest takes a perfectly cromulent jpeg file and
only passes into the ImageDecoder the first half of the image.  We
then verify that the image decoder returns a valid bitmap of the
correct dimensions.

We also fixed some png library errors, including issue 1691.

Also, suppressed the majority of warnings from using libpng and
libjpeg.  By default, most warnings are *not* suppressed in debug mode.
If you have a debug binary and wish to suppress warnings, set the
following environment variables to true
    skia_images_png_suppressDecoderWarnings
    skia_images_jpeg_suppressDecoderWarnings
or from within a program that links to Skia:
    #if defined(SK_DEBUG)
    #include "SkRTConf.h"
    SK_CONF_SET("images.jpeg.suppressDecoderWarnings", true);
    SK_CONF_SET("images.png.suppressDecoderWarnings", true);
    #endif

I tested this, before (control) and after these changes (test), on
364,295 skps from the cluster telemetry.
-   number of errors+warnings in control = 2804
-   number of errors+warnings fixed = 2283
-   number of PNG verbosity fixed =  2152
-   number of PNG error fixed = 4
-   number of PNG segfault fixed = 3
-   number of PNG errors changed to warnings = 62
-   number of JPG verbosity fixed =  26
-   number of JPG error fixed = 91
Not all errors and warning have been fixed.

These numbers were generated using the find_bad_images_in_skps.py
program.  This program may be useful going forward for testing
image-decoding libraries on skp files from the cluster telemetry.
find_bad_images_in_skps.py depends on the test_image_decoder program,
which simply executes the SkImageDecoder::DecodeFile function and uses
its exit status to report success or failure.

BUG=skia:1649
BUG=skia:1691
BUG=skia:1680
R=scroggo@google.com

Review URL: https://codereview.chromium.org/24449003

git-svn-id: http://skia.googlecode.com/svn/trunk@11597 2bbb7eff-a529-9590-31e7-b0007b416f81
      fed30372
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