this results in flickering with animated webp + alpha. disabling the
option is a workaround to restore the behavior to the previous release.
BUG=webp:365
Change-Id: Iac7fcc0d483837e76cc54ad3f26c4e0e5511e31d
it actually disables the disposal / blending method
and just displays the raw delta values.
Useful for debugging.
TODO: Outline the refreshed area with a drawn rectangle?
Change-Id: I6f8cddd0aad8b953cff78a693ae7e8c31def010c
quiets a -Wimplicit-function-declaration with some configurations of gcc
(-std=c99).
_POSIX_C_SOURCE is preferred over _BSD_SOURCE with newer versions of
glibc
Change-Id: I378bffb13ba52ff5c4bad1433090dcc387e5d507
The image is scaled to fit the whole viewport.
Avoid some oddities with offsets, etc.
removes some TODO.
Change-Id: I52fae9ca80a2feed234f32261c7f6358d7594e21
decoding and file i/o have been split to imageio, all that remains is
some string routines used for parameter parsing in the examples
Change-Id: I77386cd8aa39124b9e14c95fdbaa17ea4ab5bb24
when the previous frame does not specify dispose to background only the
current frame's rectangle should be cleared
related to bug #245
Change-Id: I2fc4f5be99057e0bf87d8fedec57b06859b070bd
this is in line with the recommendation in the spec, cf.,
5603947 webp-container-spec: clarify background clear on loop
Change-Id: Id3910395b05a1a1f2804be841b61f97bd4bac593
previously the first frame would be redisplayed, which might be
unexpected if the final frame was meant to be a composite, for example.
Change-Id: I4da795623c71501e2fa426e8fba8fb2ffcbab58a
new options:
dwebp -alpha_dither
vwebp -noalphadither
When the source was marked as quantized, we use a threshold-averaging
filter to smooth the decoded alpha plane.
Note: this option forces the decoding of alpha data in one pass, and
might slow the decoding a bit.
The new field in WebPDecoderOptions struct is 'alpha_dithering_strength'
(0 by default, means: off). Max strength value is '100'.
Change-Id: I218e21af96360d4781587fede95f8ea4e2b7287a
this change has the side-effect of using directory names in the
include, silencing a lint warning.
Change-Id: Ib91cf63a90534e32fadfa5c2372bfdb29f854d02
Even at high quality setting, the U/V quantizer step is limited
to 4 which can lead to banding on gradient.
This option allows to selectively apply some randomness to
potentially flattened-out U/V blocks and attenuate the banding.
This option is off by default in 'dwebp', but set to -dither 50
by default in 'vwebp'.
Note: depending on the number of blocks selectively dithered,
we can have up to a 10% slow-down in decoding speed it seems.
Change-Id: Icc2446007f33ddacb60b3a80a9e63f2d5ad162de
...and make gif2webp and vwebp compile without them.
Makefile.vc still to be updated...
Meanwhile the CL environment variable can be supplemented with
set CL=/DWEBP_HAVE_GL /IC:\opt\freeglut\include
Change-Id: I37a60b8c32aafd125bffa98b6cc9f57c022ebbd0
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
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
- Separate out mux.h and demux.h
- muxtypes.h: new header for data types common to mux/demux
- Move some misc read/write utilities to utils/utils.h
- Remove some duplicate methods.
- Separate out mux/demux libraries
Change-Id: If9b9569b10d55d922ad9317ef51710544315d6de
* fix gif2webp to handle disposal method and odd offset correctly
+ remove -scale and -crop option from vwebp, since it'll be broken
with offsets and fragments. Needs a revisit.
+ remove a warning in gif2web
Change-Id: If04c6d085806e32540f2f15a37244c4407b719b3
- Also, use the term 'fragments' instead of 'tiling' in code
- This makes code consistent with the spec.
Change-Id: Ibeccffc35db23bbedb88cc5e18e29e51621931f8
