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
some multiplies here and there needed some extra checks
and error reporting. Even if width * height is guaranteed
to be < 2**32, we were multiplying by num_channels and
triggering a 32b overflow.
Some multiplies were not using size_t or uint64_t, additionally.
Change-Id: If2a35b94c8af204135f4b88a7fd63850aa381bbf
Change it from transparent white to transparent black, which matches
the transparent color assumed in Webp dispose-to-background method.
Also pre-multiply background colors before comparison in anim_diff,
just as what is done with regular pixel values.
Change-Id: I5a790522df21619c666ce499f73e42294ed276f2
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
convert the assert() to an error check to avoid crashing when reading
malformed files.
BUG=webp:302
Change-Id: I25eed9cab5c0a439bd3411beacc83f3a27af2bbf
-> WebPImageReader
Introduce a variant of image-guessing function that returns a reader
directly: WebPGuessImageReader()
Change-Id: I5ddc53024fcf941e33d997b2be6aa1a963d939ab
adds a generic examples/image_dec.[ch] entry point too.
WebPGuessImageType() can be used to infer image type.
Change-Id: I8337e7b6ad91863c9cf118e4791668d2d175079b
After the introduction of lossy frame rectangles
we need equivalent option in anim_diff for merging similar frames.
Change-Id: I1d03acace396ec4cb0212586c6e8b8ec5b0b0bfc
If value is '2', it means the buffer is a 'slow' one, like GPU-mapped memory.
This change is backward compatible (setting is_external_memory to 2
will be a no-op in previous libraries)
dwebp: add flags to force a particular colorspace format
new flags is:
-pixel_format {RGB,RGBA,BGR,BGRA,ARGB,RGBA_4444,RGB_565,
rgbA,bgrA,Argb,rgbA_4444,YUV,YUVA}
and also,external_memory {0,1,2}
These flags are mostly for debuggging purpose, and hence are not documented.
Change-Id: Iac88ce1e10b35163dd7af57f9660f062f5d8ed5e
This is to prevent users shooting in the foot using -psnr or
-size alone and not getting the expected result.
Change-Id: I67a3289e4ec0a2a813c98807f2ec5e600f52dc63
though visible WebPCopyPlane & WebPCopyPixels are not part of the public
api; avoid using a private header within this public module.
Change-Id: I5c8615fcc07090ffaa8933b00af418d8431936eb
we map the input file into memory, even in the non-stdin case.
This is less efficient than letting the png/jpeg/... decoding libraries
use fread()'s, but more general.
Change-Id: I4501cb9a1daf69593eb8e3326c115cd8cbdf92fd
-> read is a bit slower (memory allocation and such) than reading directly from disk.
-> we're not yet ready to accept stdin as input (-- -) because we still need to guess
the file type with GetImageType(). And since we can't rewind on stdin, this will need
a bit more work before being able to read from stdin.
Change-Id: I6491fac4b07d28d1854518325ead88669656ddbf
Rename the flag to exact instead of the opposite cleanup_alpha. Add the flag to
WebPConfig. Do the cleanup in the webp encoder library rather than the cwebp
binary, this will be needed for the next stage: smarter alpha cleanup for
better compression which cannot be done as a preprocessing due to depending on
predictor choices in the encoder.
Change-Id: I2fbf57f918a35f2da6186ef0b5d85e5fd0020eef
We now get error string instead of printing it.
The verbose option is now only used to print info and warnings.
Change-Id: I985c5acd427a9d1973068e7b7a8af5dd0d6d2585
