Earlier, all lossless images were assumed to contain alpha.
Now, we use the 'alpha_is_used' bit from the VP8L bitstream to determine
the
same.
Detecting an absence of alpha can sometimes lead to much more efficient
rendering, especially for animated images.
Related: refine mux code to read width/height/has_alpha information only
once
per frame/fragment. This avoid frequent calls to VP8(L)GetInfo().
Change-Id: I4e0eef4db7d94425396c7dff6ca5599d5bca8297
This is to ensure that the output WebP image is consistent with original
GIF when displayed against any background color.
Change-Id: I14218848153eb40358aa4ce331b2543d2fc2e86c
from x86_64-w64-mingw32-gcc
examples/wicdec.c: In function ‘ExtractICCP’:
examples/wicdec.c:131:21: warning: format ‘%u’ expects argument of type
‘unsigned int’, but argument 4 has type ‘size_t’ [-Wformat]
Change-Id: I6642dae62265a2276ae9ac96dd8ce6f1e2d37ca5
rather than symlink the webm/vpx terms, use the same header as libvpx to
reference in-tree files
based on the discussion in:
https://codereview.chromium.org/12771026/
Change-Id: Ia3067ecddefaa7ee01550136e00f7b3f086d4af4
They went out of sync some time ago, and are
no longer really required since we have them
buildable from makefile.unix
Change-Id: Ica2dcf5c55f44365598f832f55204d123d7aa601
new option: -blend_alpha 0xrrggbb
also: don't force picture.use_argb value for lossless. Instead,
delay the YUVA<->ARGB conversion till WebPEncode() is called.
This make the blending more accurate when source is ARGB
and lossy compression is used (YUVA).
This has an effect on cropping/rescaling. E.g. for PNG, these
are now done in ARGB colorspace instead of YUV when lossy compression
is used.
Change-Id: I18571f1b1179881737a8dbd23ad0aa8cddae3c6b
When transparent color index and background color index are same,
we should set background color to 0x00ffffff (transparent).
For this, we delay setting the background color until we have read the
first frame.
Change-Id: I443609b9c7697a2b94a66992460cff8465b3c127
buffer the last frame's details to perform DISPOSE_BACKGROUND on the
image's area, rather than the entire canvas.
also fixes transparent backgrounds with animated images
Change-Id: I53e4d70c441e1eeb136f1d01e7c88de4f9ecff53
this would require a PRIuS or similar macro for proper platform
compatibility (Visual Studio for instance would be variants of %lu)
Change-Id: I1af530c7c358c91b845acde1d8c12ef46c2ef746
METADATA_ICCP was renamed to METADATA_ICC in
d8dc72a examples: normalize icc related program arguments
but was merged without rebasing after
0bc4268 cwebp: output metadata statistics
Change-Id: Ie317208488cc851d5d21300591c91cebf5abd4a7
