update ChangeLog

Change-Id: I794a5d58005bb0934ce0de06483567e8ed6bd8eb

Android.mk

@@ -10,8 +10,6 @@ ifeq ($(APP_OPTIM),release)
   endif
 endif
 
-include $(CLEAR_VARS)
-
 ifneq ($(findstring armeabi-v7a, $(TARGET_ARCH_ABI)),)
   # Setting LOCAL_ARM_NEON will enable -mfpu=neon which may cause illegal
   # instructions to be generated for armv7a code. Instead target the neon code
@@ -21,7 +19,7 @@ else
   NEON := c
 endif
 
-LOCAL_SRC_FILES := \
+dec_srcs := \
     src/dec/alpha.c \
     src/dec/buffer.c \
     src/dec/frame.c \
@@ -32,6 +30,11 @@ LOCAL_SRC_FILES := \
     src/dec/vp8.c \
     src/dec/vp8l.c \
     src/dec/webp.c \
+
+demux_srcs := \
+    src/demux/demux.c \
+
+dsp_dec_srcs := \
     src/dsp/alpha_processing.c \
     src/dsp/alpha_processing_sse2.c \
     src/dsp/cpu.c \
@@ -40,11 +43,6 @@ LOCAL_SRC_FILES := \
     src/dsp/dec_mips32.c \
     src/dsp/dec_neon.$(NEON) \
     src/dsp/dec_sse2.c \
-    src/dsp/enc.c \
-    src/dsp/enc_avx2.c \
-    src/dsp/enc_mips32.c \
-    src/dsp/enc_neon.$(NEON) \
-    src/dsp/enc_sse2.c \
     src/dsp/lossless.c \
     src/dsp/lossless_mips32.c \
     src/dsp/lossless_neon.$(NEON) \
@@ -55,6 +53,15 @@ LOCAL_SRC_FILES := \
     src/dsp/yuv.c \
     src/dsp/yuv_mips32.c \
     src/dsp/yuv_sse2.c \
+
+dsp_enc_srcs := \
+    src/dsp/enc.c \
+    src/dsp/enc_avx2.c \
+    src/dsp/enc_mips32.c \
+    src/dsp/enc_neon.$(NEON) \
+    src/dsp/enc_sse2.c \
+
+enc_srcs := \
     src/enc/alpha.c \
     src/enc/analysis.c \
     src/enc/backward_references.c \
@@ -75,19 +82,38 @@ LOCAL_SRC_FILES := \
     src/enc/tree.c \
     src/enc/vp8l.c \
     src/enc/webpenc.c \
+
+mux_srcs := \
+    src/mux/muxedit.c \
+    src/mux/muxinternal.c \
+    src/mux/muxread.c \
+
+utils_dec_srcs := \
     src/utils/bit_reader.c \
-    src/utils/bit_writer.c \
     src/utils/color_cache.c \
     src/utils/filters.c \
     src/utils/huffman.c \
-    src/utils/huffman_encode.c \
-    src/utils/quant_levels.c \
     src/utils/quant_levels_dec.c \
     src/utils/random.c \
     src/utils/rescaler.c \
     src/utils/thread.c \
     src/utils/utils.c \
 
+utils_enc_srcs := \
+    src/utils/bit_writer.c \
+    src/utils/huffman_encode.c \
+    src/utils/quant_levels.c \
+
+################################################################################
+# libwebpdecoder
+
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES := \
+    $(dec_srcs) \
+    $(dsp_dec_srcs) \
+    $(utils_dec_srcs) \
+
 LOCAL_CFLAGS := $(WEBP_CFLAGS)
 LOCAL_C_INCLUDES += $(LOCAL_PATH)/src
 
@@ -96,6 +122,38 @@ LOCAL_ARM_MODE := arm
 
 LOCAL_STATIC_LIBRARIES := cpufeatures
 
+LOCAL_MODULE := webpdecoder_static
+
+include $(BUILD_STATIC_LIBRARY)
+
+ifeq ($(ENABLE_SHARED),1)
+include $(CLEAR_VARS)
+
+LOCAL_WHOLE_STATIC_LIBRARIES := webpdecoder_static
+
+LOCAL_MODULE := webpdecoder
+
+include $(BUILD_SHARED_LIBRARY)
+endif  # ENABLE_SHARED=1
+
+################################################################################
+# libwebp
+
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES := \
+    $(dsp_enc_srcs) \
+    $(enc_srcs) \
+    $(utils_enc_srcs) \
+
+LOCAL_CFLAGS := $(WEBP_CFLAGS)
+LOCAL_C_INCLUDES += $(LOCAL_PATH)/src
+
+# prefer arm over thumb mode for performance gains
+LOCAL_ARM_MODE := arm
+
+LOCAL_WHOLE_STATIC_LIBRARIES := webpdecoder_static
+
 LOCAL_MODULE := webp
 
 ifeq ($(ENABLE_SHARED),1)
@@ -104,6 +162,54 @@ else
   include $(BUILD_STATIC_LIBRARY)
 endif
 
+################################################################################
+# libwebpdemux
+
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES := $(demux_srcs)
+
+LOCAL_CFLAGS := $(WEBP_CFLAGS)
+LOCAL_C_INCLUDES += $(LOCAL_PATH)/src
+
+# prefer arm over thumb mode for performance gains
+LOCAL_ARM_MODE := arm
+
+LOCAL_MODULE := webpdemux
+
+ifeq ($(ENABLE_SHARED),1)
+  LOCAL_SHARED_LIBRARIES := webp
+  include $(BUILD_SHARED_LIBRARY)
+else
+  LOCAL_STATIC_LIBRARIES := webp
+  include $(BUILD_STATIC_LIBRARY)
+endif
+
+################################################################################
+# libwebpmux
+
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES := $(mux_srcs)
+
+LOCAL_CFLAGS := $(WEBP_CFLAGS)
+LOCAL_C_INCLUDES += $(LOCAL_PATH)/src
+
+# prefer arm over thumb mode for performance gains
+LOCAL_ARM_MODE := arm
+
+LOCAL_MODULE := webpmux
+
+ifeq ($(ENABLE_SHARED),1)
+  LOCAL_SHARED_LIBRARIES := webp
+  include $(BUILD_SHARED_LIBRARY)
+else
+  LOCAL_STATIC_LIBRARIES := webp
+  include $(BUILD_STATIC_LIBRARY)
+endif
+
+################################################################################
+
 include $(LOCAL_PATH)/examples/Android.mk
 
 $(call import-module,android/cpufeatures)

ChangeLog

@@ -1,3 +1,50 @@
+a661e50 Disable NEON code on Native Client
+fcd94e9 update ChangeLog (tag: v0.4.3-rc1)
+569fe57 update NEWS
+bd852f5 bump version to 0.4.3
+2d58b64 WebPPictureRescale: add a note about 0 width/height
+a0d8ca5 examples/Android.mk: add webpmux_example target
+34b1d29 Android.mk: add webpmux target
+7561988 Android.mk: add webpdemux target
+a987576 Android.mk: add webpdecoder{,_static} targets
+a6d4859 Android.mk: split source lists per-directory
+77544d5 fix iOS arm64 build with Xcode 6.3
+6dea157 doc/webp-container-spec: note MSB order for chunk diagrams
+f7cd57b doc/webp-container-spec: cosmetics
+1d6b250 vwebp: clear canvas at the beginning of each loop
+f97b3f8 webp-container-spec: clarify background clear on loop
+4ba83c1 vwebp: remove unnecessary static Help() prototype
+d34e8e3 vwebp/animation: display last frame on end-of-loop
+bbbc524 dec/vp8: clear 'dither_' on skipped blocks
+0339fa2 lossless_neon: enable subtract green for aarch64
+5a0c220 Regression fix for lossless decoding
+6e3a31d wicdec: (msvs) quiet some /analyze warnings
+b49a578 dwebp/WritePNG: mark png variables volatile
+0a4391a dwebp: include setjmp.h w/WEBP_HAVE_PNG
+90f1ec5 dwebp: correct sign in format strings
+b61ce86 VP8LEncodeStream: add an assert
+df1081b dsp/cpu: (msvs) add include for __cpuidex
+39aa055 dsp/cpu: (msvs) avoid immintrin.h on _M_ARM
+f814f42 dsp/cpu: add include for _xgetbv() w/MSVS
+8508ab9 cpu: fix AVX2 detection for gcc/clang targets
+5769623 fix handling of zero-sized partition #0 corner case
+b2e71a9 make the 'last_cpuinfo_used' variable names unique
+1273e84 add -Wformat-nonliteral and -Wformat-security
+3ae78eb multi-thread fix: lock each entry points with a static var
+5c1eeda webp-container-spec: remove references to fragments
+c5ceea4 enc_neon: fix building with non-Xcode clang (iOS)
+d0859d6 iosbuild: add x64_64 simulator support
+046732c WebPEncode: Support encoding same pic twice (even if modified)
+4426f50 webp/types.h: use inline for clang++/-std=c++11
+e297fc7 gif2webp: Use the default hint instead of WEBP_HINT_GRAPH.
+855fe43 Makefile.vc: add a 'legacy' RTLIBCFG option
+b7eb6d5 gif2webp: Support GIF_DISPOSE_RESTORE_PREVIOUS
+5691bdd gif2webp: Handle frames with odd offsets + disposal to background.
+8301da1 stopwatch.h: fix includes
+6a2209a update ChangeLog (tag: v0.4.2, origin/0.4.2, 0.4.2)
+36cad6a bit_reader.h: cosmetics: fix a typo
+e2ecae6 enc_mips32: workaround gcc-4.9 bug
+243e68d update ChangeLog (tag: v0.4.2-rc2)
 eec5f5f enc/vp8enci.h: update version number
 0c1b98d update NEWS
 69b0fc9 update AUTHORS
@@ -51,7 +98,7 @@ fc3c175 dsp: detect mips64 & disable mips32 code
 c1a7955 cwebp.1: restore quality description
 57a7e73 correct alpha_dithering_strength ABI check
 6c83157 correct WebPMemoryWriterClear ABI check
-8af2771 update ChangeLog (tag: v0.4.1, 0.4.1)
+8af2771 update ChangeLog (tag: v0.4.1, origin/0.4.1, 0.4.1)
 f59c0b4 iosbuild.sh: specify optimization flags
 8d34ea3 update ChangeLog (tag: v0.4.1-rc1)
 dbc3da6 makefile.unix: add vwebp.1 to the dist target
@@ -71,7 +118,7 @@ c2fc52e restore encode API compatibility
 793368e restore decode API compatibility
 b8984f3 gif2webp: fix compile with giflib 5.1.0
 222f9b1 gif2webp: simplify giflib version checking
-d2cc61b Extend MakeARGB32() to accept Alpha channel. (master)
+d2cc61b Extend MakeARGB32() to accept Alpha channel.
 4595b62 Merge "use explicit size of kErrorMessages[] arrays"
 157de01 Merge "Actuate memory stats for PRINT_MEMORY_INFO"
 fbda2f4 JPEG decoder: delay conversion to YUV to WebPEncode() call

Makefile.vc

@@ -27,7 +27,7 @@ PLATFORM_LDFLAGS = /SAFESEH
 NOLOGO     = /nologo
 CCNODBG    = cl.exe $(NOLOGO) /O2 /DNDEBUG
 CCDEBUG    = cl.exe $(NOLOGO) /Od /Gm /Zi /D_DEBUG /RTC1
-CFLAGS     = /Isrc $(NOLOGO) /W3 /EHsc /c /GS
+CFLAGS     = /Isrc $(NOLOGO) /W3 /EHsc /c
 CFLAGS     = $(CFLAGS) /DWIN32 /D_CRT_SECURE_NO_WARNINGS /DWIN32_LEAN_AND_MEAN
 CFLAGS     = $(CFLAGS) /DHAVE_WINCODEC_H /DWEBP_USE_THREAD
 LDFLAGS    = /LARGEADDRESSAWARE /MANIFEST /NXCOMPAT /DYNAMICBASE
@@ -54,6 +54,11 @@ AVX2_FLAGS = /arch:AVX2
 !IF "$(RTLIBCFG)" == "static"
 RTLIB  = /MT
 RTLIBD = /MTd
+!ELSE IF "$(RTLIBCFG)" == "legacy"
+RTLIBCFG = static
+RTLIB  = /MT
+RTLIBD = /MTd
+CFLAGS = $(CFLAGS) /GS- /arch:IA32
 !ELSE
 RTLIB   = /MD
 RTLIBD  = /MDd
@@ -139,6 +144,7 @@ CFGSET = TRUE
 !MESSAGE - all                            - build (de)mux-based targets for CFG
 !MESSAGE
 !MESSAGE RTLIBCFG controls the runtime library linkage - 'static' or 'dynamic'.
+!MESSAGE   'legacy' will produce a Windows 2000 compatible library.
 !MESSAGE OBJDIR is the path where you like to build (obj, bins, etc.),
 !MESSAGE   defaults to ..\obj
 

NEWS

@@ -1,3 +1,10 @@
+- 3/3/15: version 0.4.3
+  This is a binary compatible release.
+  * Android / gcc / iOS / MSVS build fixes and improvements
+  * lossless decode fix (issue #239 -- since 0.4.0)
+  * documentation / vwebp updates for animation
+  * multi-threading fix (issue #234)
+
 - 10/13/14: version 0.4.2
   This is a binary compatible release.
   * Android / gcc build fixes

README

@@ -4,7 +4,7 @@
           \__\__/\____/\_____/__/ ____  ___
                 / _/ /    \    \ /  _ \/ _/
                /  \_/   / /   \ \   __/  \__
-               \____/____/\_____/_____/____/v0.4.2
+               \____/____/\_____/_____/____/v0.4.3
 
 Description:
 ============

configure.ac

@@ -1,4 +1,4 @@
-AC_INIT([libwebp], [0.4.2],
+AC_INIT([libwebp], [0.4.3],
         [http://code.google.com/p/webp/issues],,
         [http://developers.google.com/speed/webp])
 AC_CANONICAL_HOST
@@ -54,6 +54,7 @@ AC_DEFUN([TEST_AND_ADD_CFLAGS],
 TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wall])
 TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wdeclaration-after-statement])
 TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wextra])
+TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wformat-nonliteral])
 TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wformat-security])
 TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wmissing-declarations])
 TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wmissing-prototypes])

doc/webp-container-spec.txt

@@ -46,25 +46,16 @@ for:
   * **Animation.** An image may have multiple frames with pauses between them,
     making it an animation.
 
-  * **Image Fragmentation.** A single bitstream in WebP has an inherent
-    limitation for width or height of 2^14 pixels, and, when using VP8, a 512
-    KiB limit on the size of the first compressed partition. To support larger
-    images, the format supports images that are composed of multiple fragments,
-    each encoded as a separate bitstream. All fragments logically form a single
-    image: they have common metadata, color profile, etc. Image fragmentation
-    may also improve efficiency for larger images, e.g., grass can be encoded
-    differently than sky.
-
 The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
 "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
 document are to be interpreted as described in [RFC 2119][].
 
+Bit numbering in chunk diagrams starts at `0` for the most significant bit
+('MSB 0') as described in [RFC 1166][].
+
 **Note:** Out of the features mentioned above, lossy compression, lossless
 compression, transparency, metadata, color profile and animation are finalized
-and are to be considered stable. On the other hand, image fragmentation is
+and are to be considered stable.
-experimental as of now, and is open to discussion, feedback and comments.
-The same is indicated using annotation "_status: experimental_" in the relevant
-sections of this document.
 
 Terminology & Basics
 ------------------------
@@ -79,7 +70,7 @@ Below are additional terms used throughout this document:
 _Reader/Writer_
 
 : Code that reads WebP files is referred to as a _reader_, while code that
-writes them is referred to as a _writer_.
+  writes them is referred to as a _writer_.
 
 _uint16_
 
@@ -101,10 +92,12 @@ _FourCC_
 _1-based_
 
 : An unsigned integer field storing values offset by `-1`. e.g., Such a field
-would store value _25_ as _24_.
+  would store value _25_ as _24_.
 
-RIFF file format
+
+RIFF File Format
 ----------------
+
 The WebP file format is based on the RIFF (resource interchange file format)
 document format.
 
@@ -144,7 +137,8 @@ _ChunkHeader('ABCD')_
 chunks that apply to any RIFF file format, while FourCCs specific to a file
 format are all lowercase. WebP does not follow this convention.
 
-WebP file header
+
+WebP File Header
 ----------------
 
      0                   1                   2                   3
@@ -164,8 +158,8 @@ WebP file header
 File Size: 32 bits (_uint32_)
 
 : The size of the file in bytes starting at offset 8. The maximum value of
-this field is 2^32 minus 10 bytes and thus the size of the whole file is at
+  this field is 2^32 minus 10 bytes and thus the size of the whole file is at
-most 4GiB minus 2 bytes.
+  most 4GiB minus 2 bytes.
 
 'WEBP': 32 bits
 
@@ -177,7 +171,8 @@ the 'WEBP' FourCC. The file SHOULD NOT contain anything after it. As the size
 of any chunk is even, the size given by the RIFF header is also even. The
 contents of individual chunks will be described in the following sections.
 
-Simple file format (lossy)
+
+Simple File Format (Lossy)
 --------------------------
 
 This layout SHOULD be used if the image requires _lossy_ encoding and does not
@@ -215,7 +210,8 @@ width and height. That is assumed to be the width and height of the canvas.
 The VP8 specification describes how to decode the image into Y'CbCr
 format. To convert to RGB, Rec. 601 SHOULD be used.
 
-Simple file format (lossless)
+
+Simple File Format (Lossless)
 -----------------------------
 
 **Note:** Older readers may not support files using the lossless format.
@@ -253,7 +249,8 @@ The current specification of the VP8L bitstream can be found at
 contains the VP8L image width and height. That is assumed to be the width
 and height of the canvas.
 
-Extended file format
+
+Extended File Format
 --------------------
 
 **Note:** Older readers may not support files using the extended format.
@@ -278,10 +275,6 @@ For a _still image_, the _image data_ consists of a single frame, whereas for
 an _animated image_, it consists of multiple frames. More details about frames
 can be found in the [Animation](#animation) section.
 
-Moreover, each frame can be fragmented or non-fragmented, as will be described
-in the [Extended WebP file header](#extended_header) section. More details about
-fragments can be found in the [Fragments](#fragments) section.
-
 All chunks SHOULD be placed in the same order as listed above. If a chunk
 appears in the wrong place, the file is invalid, but readers MAY parse the
 file, ignoring the chunks that come too late.
@@ -302,7 +295,7 @@ Extended WebP file header:
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |                      ChunkHeader('VP8X')                      |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-    |Rsv|I|L|E|X|A|F|                   Reserved                    |
+    |Rsv|I|L|E|X|A|R|                   Reserved                    |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |          Canvas Width Minus One               |             ...
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
@@ -320,7 +313,7 @@ ICC profile (I): 1 bit
 Alpha (L): 1 bit
 
 : Set if any of the frames of the image contain transparency information
-("alpha").
+  ("alpha").
 
 EXIF metadata (E): 1 bit
 
@@ -333,11 +326,11 @@ XMP metadata (X): 1 bit
 Animation (A): 1 bit
 
 : Set if this is an animated image. Data in 'ANIM' and 'ANMF' chunks should be
-used to control the animation.
+  used to control the animation.
 
-Image Fragmentation (F): 1 bit _\[status: experimental\]_
+Reserved (R): 1 bit
 
-: Set if any of the frames in the image are represented by fragments.
+: SHOULD be `0`.
 
 Reserved: 24 bits
 
@@ -382,9 +375,9 @@ animation.
 Background Color: 32 bits (_uint32_)
 
 : The default background color of the canvas in \[Blue, Green, Red, Alpha\]
-byte order. This color MAY be used to fill the unused space on the canvas around
+  byte order. This color MAY be used to fill the unused space on the canvas
-the frames, as well as the transparent pixels of the first frame. Background
+  around the frames, as well as the transparent pixels of the first frame.
-color is also used when disposal method is `1`.
+  Background color is also used when disposal method is `1`.
 
 **Note**:
 
@@ -394,6 +387,9 @@ color is also used when disposal method is `1`.
   * Viewer applications SHOULD treat the background color value as a hint, and
     are not required to use it.
 
+  * The canvas is cleared at the start of each loop. The background color MAY be
+    used to achieve this.
+
 Loop Count: 16 bits (_uint16_)
 
 : The number of times to loop the animation. `0` means infinitely.
@@ -402,7 +398,6 @@ This chunk MUST appear if the _Animation_ flag in the VP8X chunk is set.
 If the _Animation_ flag is not set and this chunk is present, it
 SHOULD be ignored.
 
-
 ANMF chunk:
 
 For animated images, this chunk contains information about a _single_ frame.
@@ -445,8 +440,8 @@ Frame Height Minus One: 24 bits (_uint24_)
 Frame Duration: 24 bits (_uint24_)
 
 : The time to wait before displaying the next frame, in 1 millisecond units.
-In particular, frame duration of 0 is useful when one wants to update multiple
+  In particular, frame duration of 0 is useful when one wants to update
-areas of the canvas at once during the animation.
+  multiple areas of the canvas at once during the animation.
 
 Reserved: 6 bits
 
@@ -454,13 +449,13 @@ Reserved: 6 bits
 
 Blending method (B): 1 bit
 
-: Indicates how transparent pixels of _the current frame_ are to be blended with
+: Indicates how transparent pixels of _the current frame_ are to be blended
-corresponding pixels of the previous canvas:
+  with corresponding pixels of the previous canvas:
 
     * `0`: Use alpha blending. After disposing of the previous frame, render the
-    current frame on the canvas using [alpha-blending](#alpha-blending). If the
+      current frame on the canvas using [alpha-blending](#alpha-blending). If
-    current frame does not have an alpha channel, assume alpha value of 255,
+      the current frame does not have an alpha channel, assume alpha value of
-    effectively replacing the rectangle.
+      255, effectively replacing the rectangle.
 
     * `1`: Do not blend. After disposing of the previous frame, render the
       current frame on the canvas by overwriting the rectangle covered by the
@@ -468,13 +463,13 @@ corresponding pixels of the previous canvas:
 
 Disposal method (D): 1 bit
 
-: Indicates how _the current frame_ is to be treated after it has been displayed
+: Indicates how _the current frame_ is to be treated after it has been
-(before rendering the next frame) on the canvas:
+  displayed (before rendering the next frame) on the canvas:
 
     * `0`: Do not dispose. Leave the canvas as is.
 
-  * `1`: Dispose to background color. Fill the _rectangle_ on the canvas covered
+    * `1`: Dispose to background color. Fill the _rectangle_ on the canvas
-    by the _current frame_ with background color specified in the
+      covered by the _current frame_ with background color specified in the
       [ANIM chunk](#anim_chunk).
 
 **Notes**:
@@ -506,9 +501,7 @@ Disposal method (D): 1 bit
 
 Frame Data: _Chunk Size_ - `16` bytes
 
-: For a fragmented frame, it consists of multiple [fragment chunks](#fragments).
+: Consists of:
-
-: For a non-fragmented frame, it consists of:
 
   * An optional [alpha subchunk](#alpha) for the frame.
 
@@ -519,49 +512,6 @@ Frame Data: _Chunk Size_ - `16` bytes
 **Note**: The 'ANMF' payload, _Frame Data_ above, consists of individual
 _padded_ chunks as described by the [RIFF file format](#riff-file-format).
 
-#### Fragments _\[status: experimental\]_
-
-For images that are represented by fragments, this chunk contains data for
-a single fragment. If the _Image Fragmentation Flag_ is not set, then this chunk
-SHOULD NOT be present.
-
-     0                   1                   2                   3
-     0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-    |                      ChunkHeader('FRGM')                      |
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-    |                  Fragment X                   |             ...
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-    ...       Fragment Y            |         Fragment Data         |
-    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-
-Fragment X: 24 bits (_uint24_)
-
-: The X coordinate of the upper left corner of the fragment is `Fragment X * 2`
-
-Fragment Y: 24 bits (_uint24_)
-
-: The Y coordinate of the upper left corner of the fragment is `Fragment Y * 2`
-
-Fragment Data: _Chunk Size_ - `6` bytes
-
-: It contains:
-
-  * An optional [alpha subchunk](#alpha) for the fragment.
-  * The [bitstream subchunk](#bitstream-vp8vp8l) for the fragment.
-  * An optional list of [unknown chunks](#unknown-chunks).
-
-Note: The width and height of the fragment is obtained from the bitstream
-subchunk.
-
-The fragments of a frame SHOULD have the following properties:
-
-  * They collectively cover the whole frame.
-
-  * No pair of fragments have any overlapping region on the frame.
-
-  * No portion of any fragment should be located outside of the canvas.
-
 #### Alpha
 
      0                   1                   2                   3
@@ -579,8 +529,8 @@ Reserved (Rsv): 2 bits
 Pre-processing (P): 2 bits
 
 : These INFORMATIVE bits are used to signal the pre-processing that has
-been performed during compression. The decoder can use this information to
+  been performed during compression. The decoder can use this information to
-e.g. dither the values or smooth the gradients prior to display.
+  e.g. dither the values or smooth the gradients prior to display.
 
     * `0`: no pre-processing
     * `1`: level reduction
@@ -643,8 +593,8 @@ Alpha bitstream: _Chunk Size_ - `1` bytes
 
 : Encoded alpha bitstream.
 
-This optional chunk contains encoded alpha data for this frame/fragment. A
+This optional chunk contains encoded alpha data for this frame. A frame
-frame/fragment containing a 'VP8L' chunk SHOULD NOT contain this chunk.
+containing a 'VP8L' chunk SHOULD NOT contain this chunk.
 
 **Rationale**: The transparency information is already part of the 'VP8L'
 chunk.
@@ -675,15 +625,15 @@ compression method is '0') or compressed using the lossless format
 
 #### Bitstream (VP8/VP8L)
 
-This chunk contains compressed bitstream data for a single frame/fragment.
+This chunk contains compressed bitstream data for a single frame.
 
 A bitstream chunk may be either (i) a VP8 chunk, using "VP8 " (note the
 significant fourth-character space) as its tag _or_ (ii) a VP8L chunk, using
 "VP8L" as its tag.
 
 The formats of VP8 and VP8L chunks are as described in sections
-[Simple file format (lossy)](#simple-file-format-lossy)
+[Simple File Format (Lossy)](#simple-file-format-lossy)
-and [Simple file format (lossless)](#simple-file-format-lossless) respectively.
+and [Simple File Format (Lossless)](#simple-file-format-lossless) respectively.
 
 #### Color profile
 
@@ -731,7 +681,6 @@ EXIF Metadata: _Chunk Size_ bytes
 
 : image metadata in EXIF format.
 
-
 XMP chunk:
 
      0                   1                   2                   3
@@ -762,47 +711,17 @@ A file MAY contain unknown chunks:
 
   * At the end of the file as described in [Extended WebP file
     header](#extended_header) section.
-  * At the end of FRGM and ANMF chunks as described in [Fragments](#fragments)
+  * At the end of ANMF chunks as described in the
-    and [Animation](#animation) sections.
+    [Animation](#animation) section.
 
 Readers SHOULD ignore these chunks. Writers SHOULD preserve them in their
 original order (unless they specifically intend to modify these chunks).
 
-### Assembling the Canvas from fragments/frames
+### Assembling the Canvas from frames
 
-Here we provide an overview of how a reader should assemble a canvas in case
+Here we provide an overview of how a reader should assemble a canvas in the
-of a fragmented-image and in case of an animated image. The notation
+case of an animated image. The notation _VP8X.field_ means the field in the
-_VP8X.field_ means the field in the 'VP8X' chunk with the same description.
+'VP8X' chunk with the same description.
-
-Displaying a _fragmented image_ canvas MUST be equivalent to the following
-pseudocode: _\[status: experimental\]_
-
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-assert VP8X.flags.hasFragments
-canvas ← new black image of size VP8X.canvasWidth x VP8X.canvasHeight.
-frgm_params ← nil
-for chunk in image_data:
-    assert chunk.tag is "FRGM"
-    frgm_params.fragmentX = Fragment X
-    frgm_params.fragmentY = Fragment Y
-    for subchunk in 'Fragment Data':
-        if subchunk.tag == "ALPH":
-            assert alpha subchunks not found in 'Fragment Data' earlier
-            frgm_params.alpha = alpha_data
-        else if subchunk.tag == "VP8 " OR subchunk.tag == "VP8L":
-            assert bitstream subchunks not found in 'Fragment Data' earlier
-            frgm_params.bitstream = bitstream_data
-    frgm_params.fragmentWidth = Width extracted from bitstream subchunk
-    frgm_params.fragmentHeight = Height extracted from bitstream subchunk
-    assert VP8X.canvasWidth >=
-        frgm_params.fragmentX + frgm_params.fragmentWidth
-    assert VP8X.canvasHeight >=
-        frgm_params.fragmentY + frgm_params.fragmentHeight
-    assert fragment has the properties mentioned in "Image Fragments" section.
-    render fragment with frame_params.alpha and frame_params.bitstream on canvas
-    with top-left corner in (frgm_params.fragmentX, frgm_params.fragmentY).
-canvas contains the decoded canvas.
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 Displaying an _animated image_ canvas MUST be equivalent to the following
 pseudocode:
@@ -810,28 +729,25 @@ pseudocode:
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 assert VP8X.flags.hasAnimation
 canvas ← new image of size VP8X.canvasWidth x VP8X.canvasHeight with
-background color ANIM.background_color.
+         background color ANIM.background_color.
 loop_count ← ANIM.loopCount
 dispose_method ← ANIM.disposeMethod
 if loop_count == 0:
     loop_count = ∞
 frame_params ← nil
-for loop = 0, ..., loop_count - 1
+assert next chunk in image_data is ANMF
-    assert next chunk in image_data is ANMF
+for loop = 0..loop_count - 1
+    clear canvas to ANIM.background_color or application defined color
+    until eof or non-ANMF chunk
         frame_params.frameX = Frame X
         frame_params.frameY = Frame Y
         frame_params.frameWidth = Frame Width Minus One + 1
         frame_params.frameHeight = Frame Height Minus One + 1
         frame_params.frameDuration = Frame Duration
-    assert VP8X.canvasWidth >= frame_params.frameX + frame_params.frameWidth
+        frame_right = frame_params.frameX + frame_params.frameWidth
-    assert VP8X.canvasHeight >= frame_params.frameY + frame_params.frameHeight
+        frame_bottom = frame_params.frameY + frame_params.frameHeight
-    if VP8X.flags.hasFragments and first subchunk in 'Frame Data' is FRGM
+        assert VP8X.canvasWidth >= frame_right
-        // Fragmented frame.
+        assert VP8X.canvasHeight >= frame_bottom
-        frame_params.{bitstream,alpha} = canvas decoded from subchunks in
-                                         'Frame Data' as per the pseudocode for
-                                         _fragmented image_ above.
-    else
-        // Non-fragmented frame.
         for subchunk in 'Frame Data':
             if subchunk.tag == "ALPH":
                 assert alpha subchunks not found in 'Frame Data' earlier
@@ -839,14 +755,15 @@ for loop = 0, ..., loop_count - 1
             else if subchunk.tag == "VP8 " OR subchunk.tag == "VP8L":
                 assert bitstream subchunks not found in 'Frame Data' earlier
                 frame_params.bitstream = bitstream_data
-    render frame with frame_params.alpha and frame_params.bitstream on canvas
+        render frame with frame_params.alpha and frame_params.bitstream on
-    with top-left corner in (frame_params.frameX, frame_params.frameY), using
+            canvas with top-left corner at (frame_params.frameX,
-    dispose method dispose_method.
+            frame_params.frameY), using dispose method dispose_method.
-    Show the contents of the image for frame_params.frameDuration * 1ms.
+        canvas contains the decoded image.
-canvas contains the decoded canvas.
+        Show the contents of the canvas for frame_params.frameDuration * 1ms.
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-Example file layouts
+
+Example File Layouts
 --------------------
 
 A lossy encoded image with alpha may look as follows:
@@ -878,17 +795,6 @@ RIFF/WEBP
 +- XMP  (metadata)
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-A fragmented image may look as follows:
-
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-RIFF/WEBP
-+- VP8X (descriptions of features used)
-+- FRGM (fragment1 parameters + data)
-+- FRGM (fragment2 parameters + data)
-+- FRGM (fragment3 parameters + data)
-+- FRGM (fragment4 parameters + data)
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
 An animated image with EXIF metadata may look as follows:
 
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -906,4 +812,5 @@ RIFF/WEBP
 [webpllspec]: https://gerrit.chromium.org/gerrit/gitweb?p=webm/libwebp.git;a=blob;f=doc/webp-lossless-bitstream-spec.txt;hb=master
 [iccspec]: http://www.color.org/icc_specs2.xalter
 [metadata]: http://www.metadataworkinggroup.org/pdf/mwg_guidance.pdf
+[rfc 1166]: http://tools.ietf.org/html/rfc1166
 [rfc 2119]: http://tools.ietf.org/html/rfc2119

examples/Android.mk

@@ -1,5 +1,8 @@
 LOCAL_PATH := $(call my-dir)
 
+################################################################################
+# libexample_util
+
 include $(CLEAR_VARS)
 
 LOCAL_SRC_FILES := \
@@ -12,6 +15,9 @@ LOCAL_MODULE := example_util
 
 include $(BUILD_STATIC_LIBRARY)
 
+################################################################################
+# cwebp
+
 include $(CLEAR_VARS)
 
 # Note: to enable jpeg/png encoding the sources from AOSP can be used with
@@ -32,6 +38,9 @@ LOCAL_MODULE := cwebp
 
 include $(BUILD_EXECUTABLE)
 
+################################################################################
+# dwebp
+
 include $(CLEAR_VARS)
 
 LOCAL_SRC_FILES := \
@@ -44,3 +53,19 @@ LOCAL_STATIC_LIBRARIES := example_util webp
 LOCAL_MODULE := dwebp
 
 include $(BUILD_EXECUTABLE)
+
+################################################################################
+# webpmux
+
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES := \
+    webpmux.c \
+
+LOCAL_CFLAGS := $(WEBP_CFLAGS)
+LOCAL_C_INCLUDES := $(LOCAL_PATH)/../src
+LOCAL_STATIC_LIBRARIES := example_util webpmux webp
+
+LOCAL_MODULE := webpmux_example
+
+include $(BUILD_EXECUTABLE)

examples/dwebp.c

@@ -22,6 +22,7 @@
 
 #ifdef WEBP_HAVE_PNG
 #include <png.h>
+#include <setjmp.h>   // note: this must be included *after* png.h
 #endif
 
 #ifdef HAVE_WINCODEC_H
@@ -192,8 +193,8 @@ static int WritePNG(FILE* out_file, const WebPDecBuffer* const buffer) {
   uint8_t* const rgb = buffer->u.RGBA.rgba;
   const int stride = buffer->u.RGBA.stride;
   const int has_alpha = (buffer->colorspace == MODE_RGBA);
-  png_structp png;
+  volatile png_structp png;
-  png_infop info;
+  volatile png_infop info;
   png_uint_32 y;
 
   png = png_create_write_struct(PNG_LIBPNG_VER_STRING,
@@ -203,11 +204,11 @@ static int WritePNG(FILE* out_file, const WebPDecBuffer* const buffer) {
   }
   info = png_create_info_struct(png);
   if (info == NULL) {
-    png_destroy_write_struct(&png, NULL);
+    png_destroy_write_struct((png_structpp)&png, NULL);
     return 0;
   }
   if (setjmp(png_jmpbuf(png))) {
-    png_destroy_write_struct(&png, &info);
+    png_destroy_write_struct((png_structpp)&png, (png_infopp)&info);
     return 0;
   }
   png_init_io(png, out_file);
@@ -221,7 +222,7 @@ static int WritePNG(FILE* out_file, const WebPDecBuffer* const buffer) {
     png_write_rows(png, &row, 1);
   }
   png_write_end(png, info);
-  png_destroy_write_struct(&png, &info);
+  png_destroy_write_struct((png_structpp)&png, (png_infopp)&info);
   return 1;
 }
 #else    // !HAVE_WINCODEC_H && !WEBP_HAVE_PNG
@@ -244,10 +245,10 @@ static int WritePPM(FILE* fout, const WebPDecBuffer* const buffer, int alpha) {
   uint32_t y;
 
   if (alpha) {
-    fprintf(fout, "P7\nWIDTH %d\nHEIGHT %d\nDEPTH 4\nMAXVAL 255\n"
+    fprintf(fout, "P7\nWIDTH %u\nHEIGHT %u\nDEPTH 4\nMAXVAL 255\n"
                   "TUPLTYPE RGB_ALPHA\nENDHDR\n", width, height);
   } else {
-    fprintf(fout, "P6\n%d %d\n255\n", width, height);
+    fprintf(fout, "P6\n%u %u\n255\n", width, height);
   }
   for (y = 0; y < height; ++y) {
     if (fwrite(rgb + y * stride, width, bytes_per_px, fout) != bytes_per_px) {
@@ -404,7 +405,7 @@ static int WriteAlphaPlane(FILE* fout, const WebPDecBuffer* const buffer) {
   const int a_stride = buffer->u.YUVA.a_stride;
   uint32_t y;
   assert(a != NULL);
-  fprintf(fout, "P5\n%d %d\n255\n", width, height);
+  fprintf(fout, "P5\n%u %u\n255\n", width, height);
   for (y = 0; y < height; ++y) {
     if (fwrite(a + y * a_stride, width, 1, fout) != 1) {
       return 0;

examples/gif2webp.c

@@ -46,18 +46,7 @@
 
 //------------------------------------------------------------------------------
 
-static int transparent_index;  // Index of transparent color in the map.
+static int transparent_index = -1;  // Opaque frame by default.
-
-static void ResetFrameInfo(WebPMuxFrameInfo* const info) {
-  WebPDataInit(&info->bitstream);
-  info->x_offset = 0;
-  info->y_offset = 0;
-  info->duration = 0;
-  info->id = WEBP_CHUNK_ANMF;
-  info->dispose_method = WEBP_MUX_DISPOSE_NONE;
-  info->blend_method = WEBP_MUX_BLEND;
-  transparent_index = -1;  // Opaque frame by default.
-}
 
 static void SanitizeKeyFrameIntervals(size_t* const kmin_ptr,
                                       size_t* const kmax_ptr) {
@@ -270,7 +259,8 @@ int main(int argc, const char *argv[]) {
   GifFileType* gif = NULL;
   WebPConfig config;
   WebPPicture frame;
-  WebPMuxFrameInfo info;
+  int duration = 0;
+  FrameDisposeMethod orig_dispose = FRAME_DISPOSE_NONE;
   WebPMuxAnimParams anim = { WHITE_COLOR, 0 };
   WebPFrameCache* cache = NULL;
 
@@ -290,14 +280,11 @@ int main(int argc, const char *argv[]) {
   size_t kmax = 0;
   int allow_mixed = 0;   // If true, each frame can be lossy or lossless.
 
-  ResetFrameInfo(&info);
-
   if (!WebPConfigInit(&config) || !WebPPictureInit(&frame)) {
     fprintf(stderr, "Error! Version mismatch!\n");
     return -1;
   }
   config.lossless = 1;  // Use lossless compression by default.
-  config.image_hint = WEBP_HINT_GRAPH;   // always low-color
 
   if (argc == 1) {
     Help();
@@ -499,7 +486,8 @@ int main(int argc, const char *argv[]) {
           goto End;
         }
 
-        if (!WebPFrameCacheAddFrame(cache, &config, &gif_rect, &frame, &info)) {
+        if (!WebPFrameCacheAddFrame(cache, &config, &gif_rect, orig_dispose,
+                                    duration, &frame)) {
           fprintf(stderr, "Error! Cannot encode frame as WebP\n");
           fprintf(stderr, "Error code: %d\n", frame.error_code);
         }
@@ -515,7 +503,9 @@ int main(int argc, const char *argv[]) {
         // In GIF, graphic control extensions are optional for a frame, so we
         // may not get one before reading the next frame. To handle this case,
         // we reset frame properties to reasonable defaults for the next frame.
-        ResetFrameInfo(&info);
+        orig_dispose = FRAME_DISPOSE_NONE;
+        duration = 0;
+        transparent_index = -1;  // Opaque frame by default.
         break;
       }
       case EXTENSION_RECORD_TYPE: {
@@ -533,20 +523,19 @@ int main(int argc, const char *argv[]) {
             const int dispose = (flags >> GIF_DISPOSE_SHIFT) & GIF_DISPOSE_MASK;
             const int delay = data[2] | (data[3] << 8);  // In 10 ms units.
             if (data[0] != 4) goto End;
-            info.duration = delay * 10;  // Duration is in 1 ms units for WebP.
+            duration = delay * 10;  // Duration is in 1 ms units for WebP.
-            if (dispose == 3) {
+            switch (dispose) {
-              static int warning_printed = 0;
+              case 3:
-              if (!warning_printed) {
+                orig_dispose = FRAME_DISPOSE_RESTORE_PREVIOUS;
-                fprintf(stderr, "WARNING: GIF_DISPOSE_RESTORE unsupported.\n");
+                break;
-                warning_printed = 1;
+              case 2:
-              }
+                orig_dispose = FRAME_DISPOSE_BACKGROUND;
-              // failsafe. TODO(urvang): emulate the correct behaviour by
+                break;
-              // recoding the whole frame.
+              case 1:
-              info.dispose_method = WEBP_MUX_DISPOSE_BACKGROUND;
+              case 0:
-            } else {
+              default:
-              info.dispose_method =
+                orig_dispose = FRAME_DISPOSE_NONE;
-                  (dispose == 2) ? WEBP_MUX_DISPOSE_BACKGROUND
+                break;
-                                 : WEBP_MUX_DISPOSE_NONE;
             }
             transparent_index = (flags & GIF_TRANSPARENT_MASK) ? data[4] : -1;
             break;

examples/gif2webp_util.h

@@ -29,6 +29,13 @@ extern "C" {
 
 struct WebPPicture;
 
+// Includes all disposal methods, even the ones not supported by WebP bitstream.
+typedef enum FrameDisposeMethod {
+  FRAME_DISPOSE_NONE,
+  FRAME_DISPOSE_BACKGROUND,
+  FRAME_DISPOSE_RESTORE_PREVIOUS
+} FrameDisposeMethod;
+
 typedef struct {
   int x_offset, y_offset, width, height;
 } WebPFrameRect;
@@ -53,15 +60,15 @@ WebPFrameCache* WebPFrameCacheNew(int width, int height,
 // Release all the frame data from 'cache' and free 'cache'.
 void WebPFrameCacheDelete(WebPFrameCache* const cache);
 
-// Given an image described by 'frame', 'info' and 'orig_rect', optimize it for
+// Given an image described by 'frame', 'rect', 'dispose_method' and 'duration',
-// WebP, encode it and add it to 'cache'. 'orig_rect' can be NULL.
+// optimize it for WebP, encode it and add it to 'cache'. 'rect' can be NULL.
-// This takes care of frame disposal too, according to 'info->dispose_method'.
+// This takes care of frame disposal too, according to 'dispose_method'.
 // Returns false in case of error (and sets frame->error_code accordingly).
 int WebPFrameCacheAddFrame(WebPFrameCache* const cache,
                            const WebPConfig* const config,
-                           const WebPFrameRect* const orig_rect,
+                           const WebPFrameRect* const rect,
-                           WebPPicture* const frame,
+                           FrameDisposeMethod dispose_method, int duration,
-                           WebPMuxFrameInfo* const info);
+                           WebPPicture* const frame);
 
 // Flush the *ready* frames from cache and add them to 'mux'. If 'verbose' is
 // true, prints the information about these frames.

examples/stopwatch.h

@@ -14,6 +14,8 @@
 #ifndef WEBP_EXAMPLES_STOPWATCH_H_
 #define WEBP_EXAMPLES_STOPWATCH_H_
 
+#include "webp/types.h"
+
 #if defined _WIN32 && !defined __GNUC__
 #include <windows.h>
 
@@ -37,6 +39,7 @@ static WEBP_INLINE double StopwatchReadAndReset(Stopwatch* watch) {
 
 
 #else    /* !_WIN32 */
+#include <string.h>  // memcpy
 #include <sys/time.h>
 
 typedef struct timeval Stopwatch;

examples/vwebp.c

@@ -42,8 +42,6 @@
 #define snprintf _snprintf
 #endif
 
-static void Help(void);
-
 // Unfortunate global variables. Gathered into a struct for comfort.
 static struct {
   int has_animation;
@@ -82,6 +80,16 @@ static void ClearParams(void) {
   kParams.dmux = NULL;
 }
 
+// Sets the previous frame to the dimensions of the canvas and has it dispose
+// to background to cause the canvas to be cleared.
+static void ClearPreviousFrame(void) {
+  WebPIterator* const prev = &kParams.prev_frame;
+  prev->width = kParams.canvas_width;
+  prev->height = kParams.canvas_height;
+  prev->x_offset = prev->y_offset = 0;
+  prev->dispose_method = WEBP_MUX_DISPOSE_BACKGROUND;
+}
+
 // -----------------------------------------------------------------------------
 // Color profile handling
 static int ApplyColorProfile(const WebPData* const profile,
@@ -181,6 +189,8 @@ static void decode_callback(int what) {
         if (WebPDemuxGetFrame(kParams.dmux, 1, curr)) {
           --kParams.loop_count;
           kParams.done = (kParams.loop_count == 0);
+          if (kParams.done) return;
+          ClearPreviousFrame();
         } else {
           kParams.decoding_error = 1;
           kParams.done = 1;
@@ -395,7 +405,6 @@ int main(int argc, char *argv[]) {
   int c;
   WebPDecoderConfig* const config = &kParams.config;
   WebPIterator* const curr = &kParams.curr_frame;
-  WebPIterator* const prev = &kParams.prev_frame;
 
   if (!WebPInitDecoderConfig(config)) {
     fprintf(stderr, "Library version mismatch!\n");
@@ -486,10 +495,7 @@ int main(int argc, char *argv[]) {
     printf("Canvas: %d x %d\n", kParams.canvas_width, kParams.canvas_height);
   }
 
-  prev->width = kParams.canvas_width;
+  ClearPreviousFrame();
-  prev->height = kParams.canvas_height;
-  prev->x_offset = prev->y_offset = 0;
-  prev->dispose_method = WEBP_MUX_DISPOSE_BACKGROUND;
 
   memset(&kParams.iccp, 0, sizeof(kParams.iccp));
   kParams.has_color_profile =

examples/wicdec.c

@@ -15,6 +15,7 @@
 #include "webp/config.h"
 #endif
 
+#include <assert.h>
 #include <stdio.h>
 
 #ifdef HAVE_WINCODEC_H
@@ -109,6 +110,7 @@ static HRESULT ExtractICCP(IWICImagingFactory* const factory,
     IFS(IWICBitmapFrameDecode_GetColorContexts(frame,
                                                count, color_contexts,
                                                &num_color_contexts));
+    assert(FAILED(hr) || num_color_contexts <= count);
     for (i = 0; SUCCEEDED(hr) && i < num_color_contexts; ++i) {
       WICColorContextType type;
       IFS(IWICColorContext_GetType(color_contexts[i], &type));
@@ -116,7 +118,7 @@ static HRESULT ExtractICCP(IWICImagingFactory* const factory,
         UINT size;
         IFS(IWICColorContext_GetProfileBytes(color_contexts[i],
                                              0, NULL, &size));
-        if (size > 0) {
+        if (SUCCEEDED(hr) && size > 0) {
           iccp->bytes = (uint8_t*)malloc(size);
           if (iccp->bytes == NULL) {
             hr = E_OUTOFMEMORY;
@@ -261,7 +263,7 @@ int ReadPictureWithWIC(const char* const filename,
   IFS(IWICBitmapFrameDecode_GetPixelFormat(frame, &src_pixel_format));
   IFS(IWICBitmapDecoder_GetContainerFormat(decoder, &src_container_format));
 
-  if (keep_alpha) {
+  if (SUCCEEDED(hr) && keep_alpha) {
     const GUID** guid;
     for (guid = kAlphaContainers; *guid != NULL; ++guid) {
       if (IsEqualGUID(MAKE_REFGUID(src_container_format),

iosbuild.sh

@@ -26,7 +26,9 @@ readonly OLDPATH=${PATH}
 
 # Add iPhoneOS-V6 to the list of platforms below if you need armv6 support.
 # Note that iPhoneOS-V6 support is not available with the iOS6 SDK.
-readonly PLATFORMS="iPhoneSimulator iPhoneOS-V7 iPhoneOS-V7s iPhoneOS-V7-arm64"
+PLATFORMS="iPhoneSimulator iPhoneSimulator64"
+PLATFORMS+=" iPhoneOS-V7 iPhoneOS-V7s iPhoneOS-V7-arm64"
+readonly PLATFORMS
 readonly SRCDIR=$(dirname $0)
 readonly TOPDIR=$(pwd)
 readonly BUILDDIR="${TOPDIR}/iosbuild"
@@ -78,6 +80,9 @@ for PLATFORM in ${PLATFORMS}; do
   elif [[ "${PLATFORM}" == "iPhoneOS-V6" ]]; then
     PLATFORM="iPhoneOS"
     ARCH="armv6"
+  elif [[ "${PLATFORM}" == "iPhoneSimulator64" ]]; then
+    PLATFORM="iPhoneSimulator"
+    ARCH="x86_64"
   else
     ARCH="i386"
   fi

makefile.unix

@@ -67,6 +67,8 @@ EXTRA_FLAGS += -Wmissing-prototypes
 EXTRA_FLAGS += -Wmissing-declarations
 EXTRA_FLAGS += -Wdeclaration-after-statement
 EXTRA_FLAGS += -Wshadow
+EXTRA_FLAGS += -Wformat-security -Wformat-nonliteral
+
 # EXTRA_FLAGS += -Wvla
 
 # AVX2-specific flags:

src/Makefile.am

@@ -35,7 +35,7 @@ libwebp_la_LIBADD += utils/libwebputils.la
 # other than the ones listed on the command line, i.e., after linking, it will
 # not have unresolved symbols. Some platforms (Windows among them) require all
 # symbols in shared libraries to be resolved at library creation.
-libwebp_la_LDFLAGS = -no-undefined -version-info 5:2:0
+libwebp_la_LDFLAGS = -no-undefined -version-info 5:3:0
 libwebpincludedir = $(includedir)/webp
 pkgconfig_DATA = libwebp.pc
 
@@ -47,7 +47,7 @@ if BUILD_LIBWEBPDECODER
   libwebpdecoder_la_LIBADD += dsp/libwebpdspdecode.la
   libwebpdecoder_la_LIBADD += utils/libwebputilsdecode.la
 
-  libwebpdecoder_la_LDFLAGS = -no-undefined -version-info 1:2:0
+  libwebpdecoder_la_LDFLAGS = -no-undefined -version-info 1:3:0
   pkgconfig_DATA += libwebpdecoder.pc
 endif
 

src/dec/idec.c

@@ -357,30 +357,33 @@ static VP8StatusCode DecodeVP8FrameHeader(WebPIDecoder* const idec) {
 }
 
 // Partition #0
-static int CopyParts0Data(WebPIDecoder* const idec) {
+static VP8StatusCode CopyParts0Data(WebPIDecoder* const idec) {
   VP8Decoder* const dec = (VP8Decoder*)idec->dec_;
   VP8BitReader* const br = &dec->br_;
-  const size_t psize = br->buf_end_ - br->buf_;
+  const size_t part_size = br->buf_end_ - br->buf_;
   MemBuffer* const mem = &idec->mem_;
   assert(!idec->is_lossless_);
   assert(mem->part0_buf_ == NULL);
-  assert(psize > 0);
+  // the following is a format limitation, no need for runtime check:
-  assert(psize <= mem->part0_size_);  // Format limit: no need for runtime check
+  assert(part_size <= mem->part0_size_);
+  if (part_size == 0) {   // can't have zero-size partition #0
+    return VP8_STATUS_BITSTREAM_ERROR;
+  }
   if (mem->mode_ == MEM_MODE_APPEND) {
     // We copy and grab ownership of the partition #0 data.
-    uint8_t* const part0_buf = (uint8_t*)WebPSafeMalloc(1ULL, psize);
+    uint8_t* const part0_buf = (uint8_t*)WebPSafeMalloc(1ULL, part_size);
     if (part0_buf == NULL) {
-      return 0;
+      return VP8_STATUS_OUT_OF_MEMORY;
     }
-    memcpy(part0_buf, br->buf_, psize);
+    memcpy(part0_buf, br->buf_, part_size);
     mem->part0_buf_ = part0_buf;
     br->buf_ = part0_buf;
-    br->buf_end_ = part0_buf + psize;
+    br->buf_end_ = part0_buf + part_size;
   } else {
     // Else: just keep pointers to the partition #0's data in dec_->br_.
   }
-  mem->start_ += psize;
+  mem->start_ += part_size;
-  return 1;
+  return VP8_STATUS_OK;
 }
 
 static VP8StatusCode DecodePartition0(WebPIDecoder* const idec) {
@@ -414,8 +417,10 @@ static VP8StatusCode DecodePartition0(WebPIDecoder* const idec) {
   dec->mt_method_ = VP8GetThreadMethod(params->options, NULL,
                                        io->width, io->height);
   VP8InitDithering(params->options, dec);
-  if (!CopyParts0Data(idec)) {
+
-    return IDecError(idec, VP8_STATUS_OUT_OF_MEMORY);
+  dec->status_ = CopyParts0Data(idec);
+  if (dec->status_ != VP8_STATUS_OK) {
+    return IDecError(idec, dec->status_);
   }
 
   // Finish setting up the decoding parameters. Will call io->setup().

src/dec/vp8.c

@@ -562,6 +562,7 @@ int VP8DecodeMB(VP8Decoder* const dec, VP8BitReader* const token_br) {
     }
     block->non_zero_y_ = 0;
     block->non_zero_uv_ = 0;
+    block->dither_ = 0;
   }
 
   if (dec->filter_type_ > 0) {  // store filter info

src/dec/vp8i.h

@@ -31,7 +31,7 @@ extern "C" {
 // version numbers
 #define DEC_MAJ_VERSION 0
 #define DEC_MIN_VERSION 4
-#define DEC_REV_VERSION 2
+#define DEC_REV_VERSION 3
 
 // intra prediction modes
 enum { B_DC_PRED = 0,   // 4x4 modes

src/dec/vp8l.c

@@ -900,7 +900,7 @@ static int DecodeImageData(VP8LDecoder* const dec, uint32_t* const data,
           process_func(dec, row);
         }
       }
-      if (src < src_last) {
+      if (src < src_end) {
         if (col & mask) htree_group = GetHtreeGroupForPos(hdr, col, row);
         if (color_cache != NULL) {
           while (last_cached < src) {

src/dsp/alpha_processing.c

@@ -311,7 +311,12 @@ int (*WebPExtractAlpha)(const uint8_t*, int, int, int, uint8_t*, int);
 
 extern void WebPInitAlphaProcessingSSE2(void);
 
+static volatile VP8CPUInfo alpha_processing_last_cpuinfo_used =
+    (VP8CPUInfo)&alpha_processing_last_cpuinfo_used;
+
 void WebPInitAlphaProcessing(void) {
+  if (alpha_processing_last_cpuinfo_used == VP8GetCPUInfo) return;
+
   WebPMultARGBRow = MultARGBRow;
   WebPMultRow = MultRow;
   WebPApplyAlphaMultiply = ApplyAlphaMultiply;
@@ -326,4 +331,5 @@ void WebPInitAlphaProcessing(void) {
     }
 #endif
   }
+  alpha_processing_last_cpuinfo_used = VP8GetCPUInfo;
 }

src/dsp/cpu.c

@@ -29,16 +29,18 @@ static WEBP_INLINE void GetCPUInfo(int cpu_info[4], int info_type) {
     "cpuid\n"
     "xchg %%edi, %%ebx\n"
     : "=a"(cpu_info[0]), "=D"(cpu_info[1]), "=c"(cpu_info[2]), "=d"(cpu_info[3])
-    : "a"(info_type));
+    : "a"(info_type), "c"(0));
 }
 #elif defined(__i386__) || defined(__x86_64__)
 static WEBP_INLINE void GetCPUInfo(int cpu_info[4], int info_type) {
   __asm__ volatile (
     "cpuid\n"
     : "=a"(cpu_info[0]), "=b"(cpu_info[1]), "=c"(cpu_info[2]), "=d"(cpu_info[3])
-    : "a"(info_type));
+    : "a"(info_type), "c"(0));
 }
-#elif defined(_MSC_FULL_VER) && _MSC_FULL_VER >= 150030729  // >= VS2008 SP1
+#elif (defined(_M_X64) || defined(_M_IX86)) && \
+      defined(_MSC_FULL_VER) && _MSC_FULL_VER >= 150030729  // >= VS2008 SP1
+#include <intrin.h>
 #define GetCPUInfo(info, type) __cpuidex(info, type, 0)  // set ecx=0
 #elif defined(WEBP_MSC_SSE2)
 #define GetCPUInfo __cpuid
@@ -55,7 +57,9 @@ static WEBP_INLINE uint64_t xgetbv(void) {
     : "=a"(eax), "=d"(edx) : "c" (ecx));
   return ((uint64_t)edx << 32) | eax;
 }
-#elif defined(_MSC_FULL_VER) && _MSC_FULL_VER >= 160040219  // >= VS2010 SP1
+#elif (defined(_M_X64) || defined(_M_IX86)) && \
+      defined(_MSC_FULL_VER) && _MSC_FULL_VER >= 160040219  // >= VS2010 SP1
+#include <immintrin.h>
 #define xgetbv() _xgetbv(0)
 #elif defined(_MSC_VER) && defined(_M_IX86)
 static WEBP_INLINE uint64_t xgetbv(void) {

src/dsp/dec.c

@@ -688,7 +688,12 @@ extern void VP8DspInitSSE2(void);
 extern void VP8DspInitNEON(void);
 extern void VP8DspInitMIPS32(void);
 
+static volatile VP8CPUInfo dec_last_cpuinfo_used =
+    (VP8CPUInfo)&dec_last_cpuinfo_used;
+
 void VP8DspInit(void) {
+  if (dec_last_cpuinfo_used == VP8GetCPUInfo) return;
+
   VP8InitClipTables();
 
   VP8TransformWHT = TransformWHT;
@@ -727,5 +732,5 @@ void VP8DspInit(void) {
     }
 #endif
   }
+  dec_last_cpuinfo_used = VP8GetCPUInfo;
 }
-

src/dsp/dsp.h

@@ -66,7 +66,10 @@ extern "C" {
 #define WEBP_ANDROID_NEON  // Android targets that might support NEON
 #endif
 
-#if defined(__ARM_NEON__) || defined(WEBP_ANDROID_NEON) || defined(__aarch64__)
+// The intrinsics currently cause compiler errors with arm-nacl-gcc and the
+// inline assembly would need to be modified for use with Native Client.
+#if (defined(__ARM_NEON__) || defined(WEBP_ANDROID_NEON) || \
+     defined(__aarch64__)) && !defined(__native_client__)
 #define WEBP_USE_NEON
 #endif
 

src/dsp/enc.c

@@ -692,7 +692,12 @@ extern void VP8EncDspInitAVX2(void);
 extern void VP8EncDspInitNEON(void);
 extern void VP8EncDspInitMIPS32(void);
 
+static volatile VP8CPUInfo enc_last_cpuinfo_used =
+    (VP8CPUInfo)&enc_last_cpuinfo_used;
+
 void VP8EncDspInit(void) {
+  if (enc_last_cpuinfo_used == VP8GetCPUInfo) return;
+
   VP8DspInit();  // common inverse transforms
   InitTables();
 
@@ -737,5 +742,6 @@ void VP8EncDspInit(void) {
     }
 #endif
   }
+  enc_last_cpuinfo_used = VP8GetCPUInfo;
 }
 

src/dsp/enc_mips32.c

@@ -20,6 +20,10 @@
 #include "../enc/vp8enci.h"
 #include "../enc/cost.h"
 
+#if defined(__GNUC__) && defined(__ANDROID__) && LOCAL_GCC_VERSION == 0x409
+#define WORK_AROUND_GCC
+#endif
+
 static const int kC1 = 20091 + (1 << 16);
 static const int kC2 = 35468;
 
@@ -641,6 +645,7 @@ int VP8GetResidualCostMIPS32(int ctx0, const VP8Residual* const res) {
   GET_SSE_INNER(C, C + 1, C + 2, C + 3)   \
   GET_SSE_INNER(D, D + 1, D + 2, D + 3)
 
+#if !defined(WORK_AROUND_GCC)
 static int SSE16x16(const uint8_t* a, const uint8_t* b) {
   int count;
   int temp0, temp1, temp2, temp3, temp4, temp5, temp6, temp7;
@@ -742,6 +747,8 @@ static int SSE4x4(const uint8_t* a, const uint8_t* b) {
   return count;
 }
 
+#endif  // WORK_AROUND_GCC
+
 #undef GET_SSE_MIPS32
 #undef GET_SSE_MIPS32_INNER
 
@@ -759,9 +766,11 @@ void VP8EncDspInitMIPS32(void) {
   VP8TDisto4x4 = Disto4x4;
   VP8TDisto16x16 = Disto16x16;
   VP8FTransform = FTransform;
+#if !defined(WORK_AROUND_GCC)
   VP8SSE16x16 = SSE16x16;
   VP8SSE8x8 = SSE8x8;
   VP8SSE16x8 = SSE16x8;
   VP8SSE4x4 = SSE4x4;
+#endif
 #endif  // WEBP_USE_MIPS32
 }

src/dsp/enc_neon.c

@@ -1012,8 +1012,10 @@ static int QuantizeBlock(int16_t in[16], int16_t out[16],
   const int16x8_t out0 = Quantize(in, mtx, 0);
   const int16x8_t out1 = Quantize(in, mtx, 8);
   uint8x8x4_t shuffles;
-  // vtbl4_u8 is marked unavailable for iOS arm64, use wider versions there.
+  // vtbl?_u8 are marked unavailable for iOS arm64 with Xcode < 6.3, use
-#if defined(__APPLE__) && defined(__aarch64__)
+  // non-standard versions there.
+#if defined(__APPLE__) && defined(__aarch64__) && \
+    defined(__apple_build_version__) && (__apple_build_version__< 6020037)
   uint8x16x2_t all_out;
   INIT_VECTOR2(all_out, vreinterpretq_u8_s16(out0), vreinterpretq_u8_s16(out1));
   INIT_VECTOR4(shuffles,

src/dsp/lossless.c

@@ -1590,7 +1590,12 @@ extern void VP8LDspInitSSE2(void);
 extern void VP8LDspInitNEON(void);
 extern void VP8LDspInitMIPS32(void);
 
+static volatile VP8CPUInfo lossless_last_cpuinfo_used =
+    (VP8CPUInfo)&lossless_last_cpuinfo_used;
+
 void VP8LDspInit(void) {
+  if (lossless_last_cpuinfo_used == VP8GetCPUInfo) return;
+
   memcpy(VP8LPredictors, kPredictorsC, sizeof(VP8LPredictors));
 
   VP8LSubtractGreenFromBlueAndRed = VP8LSubtractGreenFromBlueAndRed_C;
@@ -1634,6 +1639,7 @@ void VP8LDspInit(void) {
     }
 #endif
   }
+  lossless_last_cpuinfo_used = VP8GetCPUInfo;
 }
 
 //------------------------------------------------------------------------------

src/dsp/lossless_neon.c

@@ -259,20 +259,45 @@ static uint32_t Predictor13(uint32_t left, const uint32_t* const top) {
 //------------------------------------------------------------------------------
 // Subtract-Green Transform
 
-// vtbl? are unavailable in iOS/arm64 builds.
+// vtbl?_u8 are marked unavailable for iOS arm64 with Xcode < 6.3, use
-#if !defined(__aarch64__)
+// non-standard versions there.
+#if defined(__APPLE__) && defined(__aarch64__) && \
+    defined(__apple_build_version__) && (__apple_build_version__< 6020037)
+#define USE_VTBLQ
+#endif
 
-// 255 = byte will be zero'd
+#ifdef USE_VTBLQ
+// 255 = byte will be zeroed
+static const uint8_t kGreenShuffle[16] = {
+  1, 255, 1, 255, 5, 255, 5, 255, 9, 255, 9, 255, 13, 255, 13, 255
+};
+
+static WEBP_INLINE uint8x16_t DoGreenShuffle(const uint8x16_t argb,
+                                             const uint8x16_t shuffle) {
+  return vcombine_u8(vtbl1q_u8(argb, vget_low_u8(shuffle)),
+                     vtbl1q_u8(argb, vget_high_u8(shuffle)));
+}
+#else  // !USE_VTBLQ
+// 255 = byte will be zeroed
 static const uint8_t kGreenShuffle[8] = { 1, 255, 1, 255, 5, 255, 5, 255  };
 
+static WEBP_INLINE uint8x16_t DoGreenShuffle(const uint8x16_t argb,
+                                             const uint8x8_t shuffle) {
+  return vcombine_u8(vtbl1_u8(vget_low_u8(argb), shuffle),
+                     vtbl1_u8(vget_high_u8(argb), shuffle));
+}
+#endif  // USE_VTBLQ
+
 static void SubtractGreenFromBlueAndRed(uint32_t* argb_data, int num_pixels) {
   const uint32_t* const end = argb_data + (num_pixels & ~3);
+#ifdef USE_VTBLQ
+  const uint8x16_t shuffle = vld1q_u8(kGreenShuffle);
+#else
   const uint8x8_t shuffle = vld1_u8(kGreenShuffle);
+#endif
   for (; argb_data < end; argb_data += 4) {
     const uint8x16_t argb = vld1q_u8((uint8_t*)argb_data);
-    const uint8x16_t greens =
+    const uint8x16_t greens = DoGreenShuffle(argb, shuffle);
-        vcombine_u8(vtbl1_u8(vget_low_u8(argb), shuffle),
-                    vtbl1_u8(vget_high_u8(argb), shuffle));
     vst1q_u8((uint8_t*)argb_data, vsubq_u8(argb, greens));
   }
   // fallthrough and finish off with plain-C
@@ -281,19 +306,21 @@ static void SubtractGreenFromBlueAndRed(uint32_t* argb_data, int num_pixels) {
 
 static void AddGreenToBlueAndRed(uint32_t* argb_data, int num_pixels) {
   const uint32_t* const end = argb_data + (num_pixels & ~3);
+#ifdef USE_VTBLQ
+  const uint8x16_t shuffle = vld1q_u8(kGreenShuffle);
+#else
   const uint8x8_t shuffle = vld1_u8(kGreenShuffle);
+#endif
   for (; argb_data < end; argb_data += 4) {
     const uint8x16_t argb = vld1q_u8((uint8_t*)argb_data);
-    const uint8x16_t greens =
+    const uint8x16_t greens = DoGreenShuffle(argb, shuffle);
-        vcombine_u8(vtbl1_u8(vget_low_u8(argb), shuffle),
-                    vtbl1_u8(vget_high_u8(argb), shuffle));
     vst1q_u8((uint8_t*)argb_data, vaddq_u8(argb, greens));
   }
   // fallthrough and finish off with plain-C
   VP8LAddGreenToBlueAndRed_C(argb_data, num_pixels & 3);
 }
 
-#endif   // !__aarch64__
+#undef USE_VTBLQ
 
 #endif   // USE_INTRINSICS
 
@@ -320,11 +347,9 @@ void VP8LDspInitNEON(void) {
   VP8LPredictors[12] = Predictor12;
   VP8LPredictors[13] = Predictor13;
 
-#if !defined(__aarch64__)
   VP8LSubtractGreenFromBlueAndRed = SubtractGreenFromBlueAndRed;
   VP8LAddGreenToBlueAndRed = AddGreenToBlueAndRed;
 #endif
-#endif
 
 #endif   // WEBP_USE_NEON
 }

src/dsp/upsampling.c

@@ -189,7 +189,12 @@ const WebPYUV444Converter WebPYUV444Converters[MODE_LAST] = {
 extern void WebPInitUpsamplersSSE2(void);
 extern void WebPInitUpsamplersNEON(void);
 
+static volatile VP8CPUInfo upsampling_last_cpuinfo_used2 =
+    (VP8CPUInfo)&upsampling_last_cpuinfo_used2;
+
 void WebPInitUpsamplers(void) {
+  if (upsampling_last_cpuinfo_used2 == VP8GetCPUInfo) return;
+
 #ifdef FANCY_UPSAMPLING
   WebPUpsamplers[MODE_RGB]       = UpsampleRgbLinePair;
   WebPUpsamplers[MODE_RGBA]      = UpsampleRgbaLinePair;
@@ -217,6 +222,7 @@ void WebPInitUpsamplers(void) {
 #endif
   }
 #endif  // FANCY_UPSAMPLING
+  upsampling_last_cpuinfo_used2 = VP8GetCPUInfo;
 }
 
 //------------------------------------------------------------------------------

src/dsp/yuv.c

@@ -123,7 +123,12 @@ WebPSamplerRowFunc WebPSamplers[MODE_LAST];
 extern void WebPInitSamplersSSE2(void);
 extern void WebPInitSamplersMIPS32(void);
 
+static volatile VP8CPUInfo yuv_last_cpuinfo_used =
+    (VP8CPUInfo)&yuv_last_cpuinfo_used;
+
 void WebPInitSamplers(void) {
+  if (yuv_last_cpuinfo_used == VP8GetCPUInfo) return;
+
   WebPSamplers[MODE_RGB]       = YuvToRgbRow;
   WebPSamplers[MODE_RGBA]      = YuvToRgbaRow;
   WebPSamplers[MODE_BGR]       = YuvToBgrRow;
@@ -149,6 +154,7 @@ void WebPInitSamplers(void) {
     }
 #endif  // WEBP_USE_MIPS32
   }
+  yuv_last_cpuinfo_used = VP8GetCPUInfo;
 }
 
 //-----------------------------------------------------------------------------

src/enc/vp8enci.h

@@ -30,7 +30,7 @@ extern "C" {
 // version numbers
 #define ENC_MAJ_VERSION 0
 #define ENC_MIN_VERSION 4
-#define ENC_REV_VERSION 2
+#define ENC_REV_VERSION 3
 
 // intra prediction modes
 enum { B_DC_PRED = 0,   // 4x4 modes

src/enc/vp8l.c

@@ -1081,6 +1081,7 @@ WebPEncodingError VP8LEncodeStream(const WebPConfig* const config,
     int y;
     err = AllocateTransformBuffer(enc, width, height);
     if (err != VP8_ENC_OK) goto Error;
+    assert(enc->argb_ != NULL);
     for (y = 0; y < height; ++y) {
       memcpy(enc->argb_ + y * width,
              picture->argb + y * picture->argb_stride,

src/enc/webpenc.c

@@ -326,7 +326,7 @@ int WebPEncode(const WebPConfig* config, WebPPicture* pic) {
 
   if (!config->lossless) {
     VP8Encoder* enc = NULL;
-    if (pic->y == NULL || pic->u == NULL || pic->v == NULL) {
+    if (pic->use_argb || pic->y == NULL || pic->u == NULL || pic->v == NULL) {
       // Make sure we have YUVA samples.
       if (config->preprocessing & 4) {
 #if WEBP_ENCODER_ABI_VERSION > 0x0204

src/utils/bit_reader.h

@@ -156,7 +156,7 @@ static WEBP_INLINE void VP8LSetBitPos(VP8LBitReader* const br, int val) {
 }
 
 // Advances the read buffer by 4 bytes to make room for reading next 32 bits.
-// Speed critical, but infrequent part of the code can be non-inligned.
+// Speed critical, but infrequent part of the code can be non-inlined.
 extern void VP8LDoFillBitWindow(VP8LBitReader* const br);
 static WEBP_INLINE void VP8LFillBitWindow(VP8LBitReader* const br) {
   if (br->bit_pos_ >= VP8L_WBITS) VP8LDoFillBitWindow(br);

src/webp/encode.h

@@ -419,7 +419,9 @@ WEBP_EXTERN(int) WebPPictureView(const WebPPicture* src,
 WEBP_EXTERN(int) WebPPictureIsView(const WebPPicture* picture);
 
 // Rescale a picture to new dimension width x height.
-// Now gamma correction is applied.
+// If either 'width' or 'height' (but not both) is 0 the corresponding
+// dimension will be calculated preserving the aspect ratio.
+// No gamma correction is applied.
 // Returns false in case of error (invalid parameter or insufficient memory).
 WEBP_EXTERN(int) WebPPictureRescale(WebPPicture* pic, int width, int height);
 

src/webp/types.h

@@ -18,10 +18,11 @@
 
 #ifndef _MSC_VER
 #include <inttypes.h>
-#ifdef __STRICT_ANSI__
+#if defined(__cplusplus) || !defined(__STRICT_ANSI__) || \
-#define WEBP_INLINE
+    (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L)
-#else  /* __STRICT_ANSI__ */
 #define WEBP_INLINE inline
+#else
+#define WEBP_INLINE
 #endif
 #else
 typedef signed   char int8_t;