dany/libwebp
1
0
Fork 0
mirror of https://github.com/webmproject/libwebp.git synced 2025-07-12 22:14:29 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity

move examples/{example_util,image_dec} to imageio/

Browse Source 
Change-Id: I2508c786a095a2a75bebf766210c64e2af88f9b6
This commit is contained in:
James Zern
2016-07-19 16:02:55 -07:00
parent ad497fbce3
commit c379b55a93
33 changed files with 158 additions and 143 deletions
Download Patch File Download Diff File Expand all files Collapse all files

38
examples/Android.mk
View File

@ -1,41 +1,5 @@
LOCAL_PATH := $(call my-dir)
################################################################################
# libexample_util
include $(CLEAR_VARS)
LOCAL_SRC_FILES := \
example_util.c \
LOCAL_CFLAGS := $(WEBP_CFLAGS)
LOCAL_C_INCLUDES := $(LOCAL_PATH)/../src
LOCAL_MODULE := example_util
include $(BUILD_STATIC_LIBRARY)
################################################################################
# libexample_dec
include $(CLEAR_VARS)
LOCAL_SRC_FILES := \
image_dec.c \
jpegdec.c \
metadata.c \
pngdec.c \
tiffdec.c \
webpdec.c \
LOCAL_CFLAGS := $(WEBP_CFLAGS)
LOCAL_C_INCLUDES := $(LOCAL_PATH)/../src
LOCAL_MODULE := example_dec
include $(BUILD_STATIC_LIBRARY)
################################################################################
# cwebp
@ -48,7 +12,7 @@ LOCAL_SRC_FILES := \
LOCAL_CFLAGS := $(WEBP_CFLAGS)
LOCAL_C_INCLUDES := $(LOCAL_PATH)/../src
LOCAL_STATIC_LIBRARIES := example_util example_dec webp
LOCAL_STATIC_LIBRARIES := example_util imagedec webp
LOCAL_MODULE := cwebp

32
examples/Makefile.am
View File

@ -12,20 +12,6 @@ if BUILD_GIF2WEBP
bin_PROGRAMS += gif2webp
endif
noinst_LTLIBRARIES = libexampleutil.la libexampledec.la
libexampleutil_la_SOURCES = example_util.c example_util.h stopwatch.h
libexampledec_la_SOURCES = image_dec.c image_dec.h
libexampledec_la_SOURCES += jpegdec.c jpegdec.h
libexampledec_la_SOURCES += metadata.c metadata.h
libexampledec_la_SOURCES += pngdec.c pngdec.h
libexampledec_la_SOURCES += tiffdec.c tiffdec.h
libexampledec_la_SOURCES += webpdec.c webpdec.h
libexampledec_la_SOURCES += wicdec.c wicdec.h
libexampledec_la_CPPFLAGS = $(JPEG_INCLUDES) $(PNG_INCLUDES) $(TIFF_INCLUDES)
libexampledec_la_CPPFLAGS += $(AM_CPPFLAGS) $(USE_EXPERIMENTAL_CODE)
if BUILD_ANIMDIFF
noinst_PROGRAMS = anim_diff
endif
@ -33,31 +19,33 @@ endif
anim_diff_SOURCES = anim_diff.c anim_util.c anim_util.h
anim_diff_CPPFLAGS = $(AM_CPPFLAGS) $(USE_EXPERIMENTAL_CODE) $(GIF_INCLUDES)
anim_diff_LDADD = ../src/demux/libwebpdemux.la
anim_diff_LDADD += libexampleutil.la
anim_diff_LDADD += ../imageio/libexample_util.la
anim_diff_LDADD += $(GIF_LIBS) -lm
dwebp_SOURCES = dwebp.c stopwatch.h
dwebp_CPPFLAGS = $(AM_CPPFLAGS) $(USE_EXPERIMENTAL_CODE)
dwebp_CPPFLAGS += $(JPEG_INCLUDES) $(PNG_INCLUDES)
dwebp_LDADD = libexampleutil.la $(PNG_LIBS) $(JPEG_LIBS)
dwebp_LDADD = ../imageio/libexample_util.la $(PNG_LIBS) $(JPEG_LIBS)
cwebp_SOURCES = cwebp.c stopwatch.h
cwebp_CPPFLAGS = $(AM_CPPFLAGS) $(USE_EXPERIMENTAL_CODE)
cwebp_LDADD = libexampleutil.la libexampledec.la ../src/libwebp.la
cwebp_LDADD += $(JPEG_LIBS) $(PNG_LIBS) $(TIFF_LIBS)
cwebp_LDADD = ../imageio/libexample_util.la ../imageio/libimagedec.la
cwebp_LDADD += ../src/libwebp.la $(JPEG_LIBS) $(PNG_LIBS) $(TIFF_LIBS)
gif2webp_SOURCES = gif2webp.c gifdec.c gifdec.h
gif2webp_CPPFLAGS = $(AM_CPPFLAGS) $(USE_EXPERIMENTAL_CODE) $(GIF_INCLUDES)
gif2webp_LDADD = libexampleutil.la ../src/mux/libwebpmux.la ../src/libwebp.la
gif2webp_LDADD += $(GIF_LIBS)
gif2webp_LDADD = ../imageio/libexample_util.la ../src/mux/libwebpmux.la
gif2webp_LDADD += ../src/libwebp.la $(GIF_LIBS)
webpmux_SOURCES = webpmux.c
webpmux_CPPFLAGS = $(AM_CPPFLAGS) $(USE_EXPERIMENTAL_CODE)
webpmux_LDADD = libexampleutil.la ../src/mux/libwebpmux.la ../src/libwebp.la
webpmux_LDADD = ../imageio/libexample_util.la ../src/mux/libwebpmux.la
webpmux_LDADD += ../src/libwebp.la
vwebp_SOURCES = vwebp.c
vwebp_CPPFLAGS = $(AM_CPPFLAGS) $(USE_EXPERIMENTAL_CODE) $(GL_INCLUDES)
vwebp_LDADD = libexampleutil.la ../src/demux/libwebpdemux.la $(GL_LIBS)
vwebp_LDADD = ../imageio/libexample_util.la ../src/demux/libwebpdemux.la
vwebp_LDADD += $(GL_LIBS)
if BUILD_LIBWEBPDECODER
anim_diff_LDADD += ../src/libwebpdecoder.la

2
examples/anim_util.c
View File

@ -22,7 +22,7 @@
#include "webp/format_constants.h"
#include "webp/decode.h"
#include "webp/demux.h"
#include "./example_util.h"
#include "../imageio/example_util.h"
#if defined(_MSC_VER) && _MSC_VER < 1900
#define snprintf _snprintf

4
examples/cwebp.c
View File

@ -20,8 +20,8 @@
#include "webp/config.h"
#endif
#include "./example_util.h"
#include "./image_dec.h"
#include "../imageio/example_util.h"
#include "../imageio/image_dec.h"
#include "./stopwatch.h"
#include "webp/encode.h"

2
examples/dwebp.c
View File

@ -40,7 +40,7 @@
#endif
#include "webp/decode.h"
#include "./example_util.h"
#include "../imageio/example_util.h"
#include "./stopwatch.h"
static int verbose = 0;

281
examples/example_util.c
View File

@ -1,281 +0,0 @@
// Copyright 2012 Google Inc. All Rights Reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the COPYING file in the root of the source
// tree. An additional intellectual property rights grant can be found
// in the file PATENTS. All contributing project authors may
// be found in the AUTHORS file in the root of the source tree.
// -----------------------------------------------------------------------------
//
// Utility functions used by the example programs.
//
#include "./example_util.h"
#if defined(_WIN32)
#include <fcntl.h> // for _O_BINARY
#include <io.h> // for _setmode()
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "webp/decode.h"
#include "./stopwatch.h"
//------------------------------------------------------------------------------
// String parsing
uint32_t ExUtilGetUInt(const char* const v, int base, int* const error) {
char* end = NULL;
const uint32_t n = (v != NULL) ? (uint32_t)strtoul(v, &end, base) : 0u;
if (end == v && error != NULL && !*error) {
*error = 1;
fprintf(stderr, "Error! '%s' is not an integer.\n",
(v != NULL) ? v : "(null)");
}
return n;
}
int ExUtilGetInt(const char* const v, int base, int* const error) {
return (int)ExUtilGetUInt(v, base, error);
}
float ExUtilGetFloat(const char* const v, int* const error) {
char* end = NULL;
const float f = (v != NULL) ? (float)strtod(v, &end) : 0.f;
if (end == v && error != NULL && !*error) {
*error = 1;
fprintf(stderr, "Error! '%s' is not a floating point number.\n",
(v != NULL) ? v : "(null)");
}
return f;
}
// -----------------------------------------------------------------------------
// File I/O
FILE* ExUtilSetBinaryMode(FILE* file) {
#if defined(_WIN32)
if (_setmode(_fileno(file), _O_BINARY) == -1) {
fprintf(stderr, "Failed to reopen file in O_BINARY mode.\n");
return NULL;
}
#endif
return file;
}
int ExUtilReadFromStdin(const uint8_t** data, size_t* data_size) {
static const size_t kBlockSize = 16384; // default initial size
size_t max_size = 0;
size_t size = 0;
uint8_t* input = NULL;
if (data == NULL || data_size == NULL) return 0;
*data = NULL;
*data_size = 0;
if (!ExUtilSetBinaryMode(stdin)) return 0;
while (!feof(stdin)) {
// We double the buffer size each time and read as much as possible.
const size_t extra_size = (max_size == 0) ? kBlockSize : max_size;
void* const new_data = realloc(input, max_size + extra_size);
if (new_data == NULL) goto Error;
input = (uint8_t*)new_data;
max_size += extra_size;
size += fread(input + size, 1, extra_size, stdin);
if (size < max_size) break;
}
if (ferror(stdin)) goto Error;
*data = input;
*data_size = size;
return 1;
Error:
free(input);
fprintf(stderr, "Could not read from stdin\n");
return 0;
}
int ExUtilReadFile(const char* const file_name,
const uint8_t** data, size_t* data_size) {
int ok;
void* file_data;
size_t file_size;
FILE* in;
const int from_stdin = (file_name == NULL) || !strcmp(file_name, "-");
if (from_stdin) return ExUtilReadFromStdin(data, data_size);
if (data == NULL || data_size == NULL) return 0;
*data = NULL;
*data_size = 0;
in = fopen(file_name, "rb");
if (in == NULL) {
fprintf(stderr, "cannot open input file '%s'\n", file_name);
return 0;
}
fseek(in, 0, SEEK_END);
file_size = ftell(in);
fseek(in, 0, SEEK_SET);
file_data = malloc(file_size);
if (file_data == NULL) return 0;
ok = (fread(file_data, file_size, 1, in) == 1);
fclose(in);
if (!ok) {
fprintf(stderr, "Could not read %d bytes of data from file %s\n",
(int)file_size, file_name);
free(file_data);
return 0;
}
*data = (uint8_t*)file_data;
*data_size = file_size;
return 1;
}
int ExUtilWriteFile(const char* const file_name,
const uint8_t* data, size_t data_size) {
int ok;
FILE* out;
const int to_stdout = (file_name == NULL) || !strcmp(file_name, "-");
if (data == NULL) {
return 0;
}
out = to_stdout ? stdout : fopen(file_name, "wb");
if (out == NULL) {
fprintf(stderr, "Error! Cannot open output file '%s'\n", file_name);
return 0;
}
ok = (fwrite(data, data_size, 1, out) == 1);
if (out != stdout) fclose(out);
return ok;
}
//------------------------------------------------------------------------------
// WebP decoding
static const char* const kStatusMessages[VP8_STATUS_NOT_ENOUGH_DATA + 1] = {
"OK", "OUT_OF_MEMORY", "INVALID_PARAM", "BITSTREAM_ERROR",
"UNSUPPORTED_FEATURE", "SUSPENDED", "USER_ABORT", "NOT_ENOUGH_DATA"
};
static void PrintAnimationWarning(const WebPDecoderConfig* const config) {
if (config->input.has_animation) {
fprintf(stderr,
"Error! Decoding of an animated WebP file is not supported.\n"
" Use webpmux to extract the individual frames or\n"
" vwebp to view this image.\n");
}
}
void ExUtilPrintWebPError(const char* const in_file, int status) {
fprintf(stderr, "Decoding of %s failed.\n", in_file);
fprintf(stderr, "Status: %d", status);
if (status >= VP8_STATUS_OK && status <= VP8_STATUS_NOT_ENOUGH_DATA) {
fprintf(stderr, "(%s)", kStatusMessages[status]);
}
fprintf(stderr, "\n");
}
int ExUtilLoadWebP(const char* const in_file,
const uint8_t** data, size_t* data_size,
WebPBitstreamFeatures* bitstream) {
VP8StatusCode status;
WebPBitstreamFeatures local_features;
if (!ExUtilReadFile(in_file, data, data_size)) return 0;
if (bitstream == NULL) {
bitstream = &local_features;
}
status = WebPGetFeatures(*data, *data_size, bitstream);
if (status != VP8_STATUS_OK) {
free((void*)*data);
*data = NULL;
*data_size = 0;
ExUtilPrintWebPError(in_file, status);
return 0;
}
return 1;
}
//------------------------------------------------------------------------------
VP8StatusCode ExUtilDecodeWebP(const uint8_t* const data, size_t data_size,
int verbose, WebPDecoderConfig* const config) {
Stopwatch stop_watch;
VP8StatusCode status = VP8_STATUS_OK;
if (config == NULL) return VP8_STATUS_INVALID_PARAM;
PrintAnimationWarning(config);
StopwatchReset(&stop_watch);
// Decoding call.
status = WebPDecode(data, data_size, config);
if (verbose) {
const double decode_time = StopwatchReadAndReset(&stop_watch);
fprintf(stderr, "Time to decode picture: %.3fs\n", decode_time);
}
return status;
}
VP8StatusCode ExUtilDecodeWebPIncremental(
const uint8_t* const data, size_t data_size,
int verbose, WebPDecoderConfig* const config) {
Stopwatch stop_watch;
VP8StatusCode status = VP8_STATUS_OK;
if (config == NULL) return VP8_STATUS_INVALID_PARAM;
PrintAnimationWarning(config);
StopwatchReset(&stop_watch);
// Decoding call.
{
WebPIDecoder* const idec = WebPIDecode(data, data_size, config);
if (idec == NULL) {
fprintf(stderr, "Failed during WebPINewDecoder().\n");
return VP8_STATUS_OUT_OF_MEMORY;
} else {
#ifdef WEBP_EXPERIMENTAL_FEATURES
size_t size = 0;
const size_t incr = 2 + (data_size / 20);
while (size < data_size) {
size_t next_size = size + (rand() % incr);
if (next_size > data_size) next_size = data_size;
status = WebPIUpdate(idec, data, next_size);
if (status != VP8_STATUS_OK && status != VP8_STATUS_SUSPENDED) break;
size = next_size;
}
#else
status = WebPIUpdate(idec, data, data_size);
#endif
WebPIDelete(idec);
}
}
if (verbose) {
const double decode_time = StopwatchReadAndReset(&stop_watch);
fprintf(stderr, "Time to decode picture: %.3fs\n", decode_time);
}
return status;
}
// -----------------------------------------------------------------------------
void ExUtilCopyPlane(const uint8_t* src, int src_stride,
uint8_t* dst, int dst_stride, int width, int height) {
while (height-- > 0) {
memcpy(dst, src, width * sizeof(*dst));
src += src_stride;
dst += dst_stride;
}
}
// -----------------------------------------------------------------------------

95
examples/example_util.h
View File

@ -1,95 +0,0 @@
// Copyright 2012 Google Inc. All Rights Reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the COPYING file in the root of the source
// tree. An additional intellectual property rights grant can be found
// in the file PATENTS. All contributing project authors may
// be found in the AUTHORS file in the root of the source tree.
// -----------------------------------------------------------------------------
//
// Utility functions used by the example programs.
//
#ifndef WEBP_EXAMPLES_EXAMPLE_UTIL_H_
#define WEBP_EXAMPLES_EXAMPLE_UTIL_H_
#include <stdio.h>
#include "webp/decode.h"
#ifdef __cplusplus
extern "C" {
#endif
//------------------------------------------------------------------------------
// String parsing
// Parses 'v' using strto(ul|l|d)(). If error is non-NULL, '*error' is set to
// true on failure while on success it is left unmodified to allow chaining of
// calls. An error is only printed on the first occurrence.
uint32_t ExUtilGetUInt(const char* const v, int base, int* const error);
int ExUtilGetInt(const char* const v, int base, int* const error);
float ExUtilGetFloat(const char* const v, int* const error);
//------------------------------------------------------------------------------
// File I/O
// Reopen file in binary (O_BINARY) mode.
// Returns 'file' on success, NULL otherwise.
FILE* ExUtilSetBinaryMode(FILE* file);
// Allocates storage for entire file 'file_name' and returns contents and size
// in 'data' and 'data_size'. Returns 1 on success, 0 otherwise. '*data' should
// be deleted using free().
// If 'file_name' is NULL or equal to "-", input is read from stdin by calling
// the function ExUtilReadFromStdin().
int ExUtilReadFile(const char* const file_name,
const uint8_t** data, size_t* data_size);
// Same as ExUtilReadFile(), but reads until EOF from stdin instead.
int ExUtilReadFromStdin(const uint8_t** data, size_t* data_size);
// Write a data segment into a file named 'file_name'. Returns true if ok.
// If 'file_name' is NULL or equal to "-", output is written to stdout.
int ExUtilWriteFile(const char* const file_name,
const uint8_t* data, size_t data_size);
//------------------------------------------------------------------------------
// Copy width x height pixels from 'src' to 'dst' honoring the strides.
void ExUtilCopyPlane(const uint8_t* src, int src_stride,
uint8_t* dst, int dst_stride, int width, int height);
//------------------------------------------------------------------------------
// WebP decoding
// Prints an informative error message regarding decode failure of 'in_file'.
// 'status' is treated as a VP8StatusCode and if valid will be printed as a
// text string.
void ExUtilPrintWebPError(const char* const in_file, int status);
// Reads a WebP from 'in_file', returning the contents and size in 'data' and
// 'data_size'. If not NULL, 'bitstream' is populated using WebPGetFeatures().
// Returns true on success.
int ExUtilLoadWebP(const char* const in_file,
const uint8_t** data, size_t* data_size,
WebPBitstreamFeatures* bitstream);
// Decodes the WebP contained in 'data'.
// 'config' is a structure previously initialized by WebPInitDecoderConfig().
// 'config->output' should have the desired colorspace selected. 'verbose' will
// cause decode timing to be reported.
// Returns the decoder status. On success 'config->output' will contain the
// decoded picture.
VP8StatusCode ExUtilDecodeWebP(const uint8_t* const data, size_t data_size,
int verbose, WebPDecoderConfig* const config);
// Same as ExUtilDecodeWebP(), but using the incremental decoder.
VP8StatusCode ExUtilDecodeWebPIncremental(
const uint8_t* const data, size_t data_size,
int verbose, WebPDecoderConfig* const config);
#ifdef __cplusplus
} // extern "C"
#endif
#endif // WEBP_EXAMPLES_EXAMPLE_UTIL_H_

2
examples/gif2webp.c
View File

@ -26,7 +26,7 @@
#include <gif_lib.h>
#include "webp/encode.h"
#include "webp/mux.h"
#include "./example_util.h"
#include "../imageio/example_util.h"
#include "./gifdec.h"
//------------------------------------------------------------------------------

46
examples/image_dec.c
View File

@ -1,46 +0,0 @@
// Copyright 2016 Google Inc. All Rights Reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the COPYING file in the root of the source
// tree. An additional intellectual property rights grant can be found
// in the file PATENTS. All contributing project authors may
// be found in the AUTHORS file in the root of the source tree.
// -----------------------------------------------------------------------------
//
// Generic image-type guessing.
#include "./image_dec.h"
static WEBP_INLINE uint32_t GetBE32(const uint8_t buf[]) {
return ((uint32_t)buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
}
WebPInputFileFormat WebPGuessImageType(const uint8_t* const data,
size_t data_size) {
WebPInputFileFormat format = WEBP_UNSUPPORTED_FORMAT;
if (data != NULL && data_size >= 12) {
const uint32_t magic1 = GetBE32(data + 0);
const uint32_t magic2 = GetBE32(data + 8);
if (magic1 == 0x89504E47U) {
format = WEBP_PNG_FORMAT;
} else if (magic1 >= 0xFFD8FF00U && magic1 <= 0xFFD8FFFFU) {
format = WEBP_JPEG_FORMAT;
} else if (magic1 == 0x49492A00 || magic1 == 0x4D4D002A) {
format = WEBP_TIFF_FORMAT;
} else if (magic1 == 0x52494646 && magic2 == 0x57454250) {
format = WEBP_WEBP_FORMAT;
}
}
return format;
}
WebPImageReader WebPGuessImageReader(const uint8_t* const data,
size_t data_size) {
switch (WebPGuessImageType(data, data_size)) {
case WEBP_PNG_FORMAT: return ReadPNG;
case WEBP_JPEG_FORMAT: return ReadJPEG;
case WEBP_TIFF_FORMAT: return ReadTIFF;
case WEBP_WEBP_FORMAT: return ReadWebP;
default: return NULL;
}
}

61
examples/image_dec.h
View File

@ -1,61 +0,0 @@
// Copyright 2016 Google Inc. All Rights Reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the COPYING file in the root of the source
// tree. An additional intellectual property rights grant can be found
// in the file PATENTS. All contributing project authors may
// be found in the AUTHORS file in the root of the source tree.
// -----------------------------------------------------------------------------
//
// All-in-one library to decode PNG/JPEG/WebP/TIFF/WIC input images.
//
// Author: Skal (pascal.massimino@gmail.com)
#ifndef WEBP_EXAMPLES_IMAGE_DEC_H_
#define WEBP_EXAMPLES_IMAGE_DEC_H_
#include "webp/types.h"
#ifdef HAVE_CONFIG_H
#include "webp/config.h"
#endif
#include "./metadata.h"
#include "./jpegdec.h"
#include "./pngdec.h"
#include "./tiffdec.h"
#include "./webpdec.h"
#include "./wicdec.h"
#ifdef __cplusplus
extern "C" {
#endif
typedef enum {
WEBP_PNG_FORMAT = 0,
WEBP_JPEG_FORMAT,
WEBP_TIFF_FORMAT,
WEBP_WEBP_FORMAT,
WEBP_UNSUPPORTED_FORMAT
} WebPInputFileFormat;
// Try to infer the image format. 'data_size' should be larger than 12.
// Returns WEBP_UNSUPPORTED_FORMAT if format can't be guess safely.
WebPInputFileFormat WebPGuessImageType(const uint8_t* const data,
size_t data_size);
// Signature for common image-reading functions (ReadPNG, ReadJPEG, ...)
typedef int (*WebPImageReader)(const uint8_t* const data, size_t data_size,
struct WebPPicture* const pic,
int keep_alpha, struct Metadata* const metadata);
// This function is similar to WebPGuessImageType(), but returns a
// suitable reader function. Or NULL if the image can't be guessed.
WebPImageReader WebPGuessImageReader(const uint8_t* const data,
size_t data_size);
#ifdef __cplusplus
} // extern "C"
#endif
#endif // WEBP_EXAMPLES_IMAGE_DEC_H_

351
examples/jpegdec.c
View File

@ -1,351 +0,0 @@
// Copyright 2012 Google Inc. All Rights Reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the COPYING file in the root of the source
// tree. An additional intellectual property rights grant can be found
// in the file PATENTS. All contributing project authors may
// be found in the AUTHORS file in the root of the source tree.
// -----------------------------------------------------------------------------
//
// JPEG decode.
#include "./jpegdec.h"
#ifdef HAVE_CONFIG_H
#include "webp/config.h"
#endif
#include <stdio.h>
#ifdef WEBP_HAVE_JPEG
#include <jpeglib.h>
#include <jerror.h>
#include <setjmp.h>
#include <stdlib.h>
#include <string.h>
#include "webp/encode.h"
#include "./example_util.h"
#include "./metadata.h"
// -----------------------------------------------------------------------------
// Metadata processing
#ifndef JPEG_APP1
# define JPEG_APP1 (JPEG_APP0 + 1)
#endif
#ifndef JPEG_APP2
# define JPEG_APP2 (JPEG_APP0 + 2)
#endif
typedef struct {
const uint8_t* data;
size_t data_length;
int seq; // this segment's sequence number [1, 255] for use in reassembly.
} ICCPSegment;
static void SaveMetadataMarkers(j_decompress_ptr dinfo) {
const unsigned int max_marker_length = 0xffff;
jpeg_save_markers(dinfo, JPEG_APP1, max_marker_length); // Exif/XMP
jpeg_save_markers(dinfo, JPEG_APP2, max_marker_length); // ICC profile
}
static int CompareICCPSegments(const void* a, const void* b) {
const ICCPSegment* s1 = (const ICCPSegment*)a;
const ICCPSegment* s2 = (const ICCPSegment*)b;
return s1->seq - s2->seq;
}
// Extract ICC profile segments from the marker list in 'dinfo', reassembling
// and storing them in 'iccp'.
// Returns true on success and false for memory errors and corrupt profiles.
static int StoreICCP(j_decompress_ptr dinfo, MetadataPayload* const iccp) {
// ICC.1:2010-12 (4.3.0.0) Annex B.4 Embedding ICC Profiles in JPEG files
static const char kICCPSignature[] = "ICC_PROFILE";
static const size_t kICCPSignatureLength = 12; // signature includes '\0'
static const size_t kICCPSkipLength = 14; // signature + seq & count
int expected_count = 0;
int actual_count = 0;
int seq_max = 0;
size_t total_size = 0;
ICCPSegment iccp_segments[255];
jpeg_saved_marker_ptr marker;
memset(iccp_segments, 0, sizeof(iccp_segments));
for (marker = dinfo->marker_list; marker != NULL; marker = marker->next) {
if (marker->marker == JPEG_APP2 &&
marker->data_length > kICCPSkipLength &&
!memcmp(marker->data, kICCPSignature, kICCPSignatureLength)) {
// ICC_PROFILE\0<seq><count>; 'seq' starts at 1.
const int seq = marker->data[kICCPSignatureLength];
const int count = marker->data[kICCPSignatureLength + 1];
const size_t segment_size = marker->data_length - kICCPSkipLength;
ICCPSegment* segment;
if (segment_size == 0 || count == 0 || seq == 0) {
fprintf(stderr, "[ICCP] size (%d) / count (%d) / sequence number (%d)"
" cannot be 0!\n",
(int)segment_size, seq, count);
return 0;
}
if (expected_count == 0) {
expected_count = count;
} else if (expected_count != count) {
fprintf(stderr, "[ICCP] Inconsistent segment count (%d / %d)!\n",
expected_count, count);
return 0;
}
segment = iccp_segments + seq - 1;
if (segment->data_length != 0) {
fprintf(stderr, "[ICCP] Duplicate segment number (%d)!\n" , seq);
return 0;
}
segment->data = marker->data + kICCPSkipLength;
segment->data_length = segment_size;
segment->seq = seq;
total_size += segment_size;
if (seq > seq_max) seq_max = seq;
++actual_count;
}
}
if (actual_count == 0) return 1;
if (seq_max != actual_count) {
fprintf(stderr, "[ICCP] Discontinuous segments, expected: %d actual: %d!\n",
actual_count, seq_max);
return 0;
}
if (expected_count != actual_count) {
fprintf(stderr, "[ICCP] Segment count: %d does not match expected: %d!\n",
actual_count, expected_count);
return 0;
}
// The segments may appear out of order in the file, sort them based on
// sequence number before assembling the payload.
qsort(iccp_segments, actual_count, sizeof(*iccp_segments),
CompareICCPSegments);
iccp->bytes = (uint8_t*)malloc(total_size);
if (iccp->bytes == NULL) return 0;
iccp->size = total_size;
{
int i;
size_t offset = 0;
for (i = 0; i < seq_max; ++i) {
memcpy(iccp->bytes + offset,
iccp_segments[i].data, iccp_segments[i].data_length);
offset += iccp_segments[i].data_length;
}
}
return 1;
}
// Returns true on success and false for memory errors and corrupt profiles.
// The caller must use MetadataFree() on 'metadata' in all cases.
static int ExtractMetadataFromJPEG(j_decompress_ptr dinfo,
Metadata* const metadata) {
static const struct {
int marker;
const char* signature;
size_t signature_length;
size_t storage_offset;
} kJPEGMetadataMap[] = {
// Exif 2.2 Section 4.7.2 Interoperability Structure of APP1 ...
{ JPEG_APP1, "Exif\0", 6, METADATA_OFFSET(exif) },
// XMP Specification Part 3 Section 3 Embedding XMP Metadata ... #JPEG
// TODO(jzern) Add support for 'ExtendedXMP'
{ JPEG_APP1, "http://ns.adobe.com/xap/1.0/", 29, METADATA_OFFSET(xmp) },
{ 0, NULL, 0, 0 },
};
jpeg_saved_marker_ptr marker;
// Treat ICC profiles separately as they may be segmented and out of order.
if (!StoreICCP(dinfo, &metadata->iccp)) return 0;
for (marker = dinfo->marker_list; marker != NULL; marker = marker->next) {
int i;
for (i = 0; kJPEGMetadataMap[i].marker != 0; ++i) {
if (marker->marker == kJPEGMetadataMap[i].marker &&
marker->data_length > kJPEGMetadataMap[i].signature_length &&
!memcmp(marker->data, kJPEGMetadataMap[i].signature,
kJPEGMetadataMap[i].signature_length)) {
MetadataPayload* const payload =
(MetadataPayload*)((uint8_t*)metadata +
kJPEGMetadataMap[i].storage_offset);
if (payload->bytes == NULL) {
const char* marker_data = (const char*)marker->data +
kJPEGMetadataMap[i].signature_length;
const size_t marker_data_length =
marker->data_length - kJPEGMetadataMap[i].signature_length;
if (!MetadataCopy(marker_data, marker_data_length, payload)) return 0;
} else {
fprintf(stderr, "Ignoring additional '%s' marker\n",
kJPEGMetadataMap[i].signature);
}
}
}
}
return 1;
}
#undef JPEG_APP1
#undef JPEG_APP2
// -----------------------------------------------------------------------------
// JPEG decoding
struct my_error_mgr {
struct jpeg_error_mgr pub;
jmp_buf setjmp_buffer;
};
static void my_error_exit(j_common_ptr dinfo) {
struct my_error_mgr* myerr = (struct my_error_mgr*)dinfo->err;
dinfo->err->output_message(dinfo);
longjmp(myerr->setjmp_buffer, 1);
}
typedef struct {
struct jpeg_source_mgr pub;
const uint8_t* data;
size_t data_size;
} JPEGReadContext;
static void ContextInit(j_decompress_ptr cinfo) {
JPEGReadContext* const ctx = (JPEGReadContext*)cinfo->src;
ctx->pub.next_input_byte = ctx->data;
ctx->pub.bytes_in_buffer = ctx->data_size;
}
static int ContextFill(j_decompress_ptr cinfo) {
// we shouldn't get here.
ERREXIT(cinfo, JERR_FILE_READ);
return 0;
}
static void ContextSkip(j_decompress_ptr cinfo, long jump_size) {
JPEGReadContext* const ctx = (JPEGReadContext*)cinfo->src;
size_t jump = (size_t)jump_size;
if (jump > ctx->pub.bytes_in_buffer) { // Don't overflow the buffer.
jump = ctx->pub.bytes_in_buffer;
}
ctx->pub.bytes_in_buffer -= jump;
ctx->pub.next_input_byte += jump;
}
static void ContextTerm(j_decompress_ptr cinfo) {
(void)cinfo;
}
static void ContextSetup(volatile struct jpeg_decompress_struct* const cinfo,
JPEGReadContext* const ctx) {
cinfo->src = (struct jpeg_source_mgr*)ctx;
ctx->pub.init_source = ContextInit;
ctx->pub.fill_input_buffer = ContextFill;
ctx->pub.skip_input_data = ContextSkip;
ctx->pub.resync_to_restart = jpeg_resync_to_restart;
ctx->pub.term_source = ContextTerm;
ctx->pub.bytes_in_buffer = 0;
ctx->pub.next_input_byte = NULL;
}
int ReadJPEG(const uint8_t* const data, size_t data_size,
WebPPicture* const pic, int keep_alpha,
Metadata* const metadata) {
volatile int ok = 0;
int stride, width, height;
volatile struct jpeg_decompress_struct dinfo;
struct my_error_mgr jerr;
uint8_t* volatile rgb = NULL;
JSAMPROW buffer[1];
JPEGReadContext ctx;
(void)keep_alpha;
memset(&ctx, 0, sizeof(ctx));
ctx.data = data;
ctx.data_size = data_size;
memset((j_decompress_ptr)&dinfo, 0, sizeof(dinfo)); // for setjmp sanity
dinfo.err = jpeg_std_error(&jerr.pub);
jerr.pub.error_exit = my_error_exit;
if (setjmp(jerr.setjmp_buffer)) {
Error:
MetadataFree(metadata);
jpeg_destroy_decompress((j_decompress_ptr)&dinfo);
goto End;
}
jpeg_create_decompress((j_decompress_ptr)&dinfo);
ContextSetup(&dinfo, &ctx);
if (metadata != NULL) SaveMetadataMarkers((j_decompress_ptr)&dinfo);
jpeg_read_header((j_decompress_ptr)&dinfo, TRUE);
dinfo.out_color_space = JCS_RGB;
dinfo.do_fancy_upsampling = TRUE;
jpeg_start_decompress((j_decompress_ptr)&dinfo);
if (dinfo.output_components != 3) {
goto Error;
}
width = dinfo.output_width;
height = dinfo.output_height;
stride = dinfo.output_width * dinfo.output_components * sizeof(*rgb);
rgb = (uint8_t*)malloc(stride * height);
if (rgb == NULL) {
goto End;
}
buffer[0] = (JSAMPLE*)rgb;
while (dinfo.output_scanline < dinfo.output_height) {
if (jpeg_read_scanlines((j_decompress_ptr)&dinfo, buffer, 1) != 1) {
goto End;
}
buffer[0] += stride;
}
if (metadata != NULL) {
ok = ExtractMetadataFromJPEG((j_decompress_ptr)&dinfo, metadata);
if (!ok) {
fprintf(stderr, "Error extracting JPEG metadata!\n");
goto Error;
}
}
jpeg_finish_decompress((j_decompress_ptr)&dinfo);
jpeg_destroy_decompress((j_decompress_ptr)&dinfo);
// WebP conversion.
pic->width = width;
pic->height = height;
ok = WebPPictureImportRGB(pic, rgb, stride);
if (!ok) goto Error;
End:
free(rgb);
return ok;
}
#else // !WEBP_HAVE_JPEG
int ReadJPEG(const uint8_t* const data, size_t data_size,
struct WebPPicture* const pic, int keep_alpha,
struct Metadata* const metadata) {
(void)data;
(void)data_size;
(void)pic;
(void)keep_alpha;
(void)metadata;
fprintf(stderr, "JPEG support not compiled. Please install the libjpeg "
"development package before building.\n");
return 0;
}
#endif // WEBP_HAVE_JPEG
// -----------------------------------------------------------------------------

38
examples/jpegdec.h
View File

@ -1,38 +0,0 @@
// Copyright 2012 Google Inc. All Rights Reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the COPYING file in the root of the source
// tree. An additional intellectual property rights grant can be found
// in the file PATENTS. All contributing project authors may
// be found in the AUTHORS file in the root of the source tree.
// -----------------------------------------------------------------------------
//
// JPEG decode.
#ifndef WEBP_EXAMPLES_JPEGDEC_H_
#define WEBP_EXAMPLES_JPEGDEC_H_
#include <stdio.h>
#include "webp/types.h"
#ifdef __cplusplus
extern "C" {
#endif
struct Metadata;
struct WebPPicture;
// Reads a JPEG from 'data', returning the decoded output in 'pic'.
// The output is RGB or YUV depending on pic->use_argb value.
// Returns true on success.
// 'keep_alpha' has no effect, but is kept for coherence with other signatures
// for image readers.
int ReadJPEG(const uint8_t* const data, size_t data_size,
struct WebPPicture* const pic, int keep_alpha,
struct Metadata* const metadata);
#ifdef __cplusplus
} // extern "C"
#endif
#endif // WEBP_EXAMPLES_JPEGDEC_H_

49
examples/metadata.c
View File

@ -1,49 +0,0 @@
// Copyright 2012 Google Inc. All Rights Reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the COPYING file in the root of the source
// tree. An additional intellectual property rights grant can be found
// in the file PATENTS. All contributing project authors may
// be found in the AUTHORS file in the root of the source tree.
// -----------------------------------------------------------------------------
//
// Metadata types and functions.
//
#include "./metadata.h"
#include <stdlib.h>
#include <string.h>
#include "webp/types.h"
void MetadataInit(Metadata* const metadata) {
if (metadata == NULL) return;
memset(metadata, 0, sizeof(*metadata));
}
void MetadataPayloadDelete(MetadataPayload* const payload) {
if (payload == NULL) return;
free(payload->bytes);
payload->bytes = NULL;
payload->size = 0;
}
void MetadataFree(Metadata* const metadata) {
if (metadata == NULL) return;
MetadataPayloadDelete(&metadata->exif);
MetadataPayloadDelete(&metadata->iccp);
MetadataPayloadDelete(&metadata->xmp);
}
int MetadataCopy(const char* metadata, size_t metadata_len,
MetadataPayload* const payload) {
if (metadata == NULL || metadata_len == 0 || payload == NULL) return 0;
payload->bytes = (uint8_t*)malloc(metadata_len);
if (payload->bytes == NULL) return 0;
payload->size = metadata_len;
memcpy(payload->bytes, metadata, metadata_len);
return 1;
}
// -----------------------------------------------------------------------------

47
examples/metadata.h
View File

@ -1,47 +0,0 @@
// Copyright 2012 Google Inc. All Rights Reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the COPYING file in the root of the source
// tree. An additional intellectual property rights grant can be found
// in the file PATENTS. All contributing project authors may
// be found in the AUTHORS file in the root of the source tree.
// -----------------------------------------------------------------------------
//
// Metadata types and functions.
//
#ifndef WEBP_EXAMPLES_METADATA_H_
#define WEBP_EXAMPLES_METADATA_H_
#include "webp/types.h"
#ifdef __cplusplus
extern "C" {
#endif
typedef struct MetadataPayload {
uint8_t* bytes;
size_t size;
} MetadataPayload;
typedef struct Metadata {
MetadataPayload exif;
MetadataPayload iccp;
MetadataPayload xmp;
} Metadata;
#define METADATA_OFFSET(x) offsetof(Metadata, x)
void MetadataInit(Metadata* const metadata);
void MetadataPayloadDelete(MetadataPayload* const payload);
void MetadataFree(Metadata* const metadata);
// Stores 'metadata' to 'payload->bytes', returns false on allocation error.
int MetadataCopy(const char* metadata, size_t metadata_len,
MetadataPayload* const payload);
#ifdef __cplusplus
} // extern "C"
#endif
#endif // WEBP_EXAMPLES_METADATA_H_

322
examples/pngdec.c
View File

@ -1,322 +0,0 @@
// Copyright 2012 Google Inc. All Rights Reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the COPYING file in the root of the source
// tree. An additional intellectual property rights grant can be found
// in the file PATENTS. All contributing project authors may
// be found in the AUTHORS file in the root of the source tree.
// -----------------------------------------------------------------------------
//
// PNG decode.
#include "./pngdec.h"
#ifdef HAVE_CONFIG_H
#include "webp/config.h"
#endif
#include <stdio.h>
#ifdef WEBP_HAVE_PNG
#include <png.h>
#include <setjmp.h> // note: this must be included *after* png.h
#include <stdlib.h>
#include <string.h>
#include "webp/encode.h"
#include "./example_util.h"
#include "./metadata.h"
static void PNGAPI error_function(png_structp png, png_const_charp error) {
if (error != NULL) fprintf(stderr, "libpng error: %s\n", error);
longjmp(png_jmpbuf(png), 1);
}
// Converts the NULL terminated 'hexstring' which contains 2-byte character
// representations of hex values to raw data.
// 'hexstring' may contain values consisting of [A-F][a-f][0-9] in pairs,
// e.g., 7af2..., separated by any number of newlines.
// 'expected_length' is the anticipated processed size.
// On success the raw buffer is returned with its length equivalent to
// 'expected_length'. NULL is returned if the processed length is less than
// 'expected_length' or any character aside from those above is encountered.
// The returned buffer must be freed by the caller.
static uint8_t* HexStringToBytes(const char* hexstring,
size_t expected_length) {
const char* src = hexstring;
size_t actual_length = 0;
uint8_t* const raw_data = (uint8_t*)malloc(expected_length);
uint8_t* dst;
if (raw_data == NULL) return NULL;
for (dst = raw_data; actual_length < expected_length && *src != '\0'; ++src) {
char* end;
char val[3];
if (*src == '\n') continue;
val[0] = *src++;
val[1] = *src;
val[2] = '\0';
*dst++ = (uint8_t)strtol(val, &end, 16);
if (end != val + 2) break;
++actual_length;
}
if (actual_length != expected_length) {
free(raw_data);
return NULL;
}
return raw_data;
}
static int ProcessRawProfile(const char* profile, size_t profile_len,
MetadataPayload* const payload) {
const char* src = profile;
char* end;
int expected_length;
if (profile == NULL || profile_len == 0) return 0;
// ImageMagick formats 'raw profiles' as
// '\n<name>\n<length>(%8lu)\n<hex payload>\n'.
if (*src != '\n') {
fprintf(stderr, "Malformed raw profile, expected '\\n' got '\\x%.2X'\n",
*src);
return 0;
}
++src;
// skip the profile name and extract the length.
while (*src != '\0' && *src++ != '\n') {}
expected_length = (int)strtol(src, &end, 10);
if (*end != '\n') {
fprintf(stderr, "Malformed raw profile, expected '\\n' got '\\x%.2X'\n",
*end);
return 0;
}
++end;
// 'end' now points to the profile payload.
payload->bytes = HexStringToBytes(end, expected_length);
if (payload->bytes == NULL) return 0;
payload->size = expected_length;
return 1;
}
static const struct {
const char* name;
int (*process)(const char* profile, size_t profile_len,
MetadataPayload* const payload);
size_t storage_offset;
} kPNGMetadataMap[] = {
// http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/PNG.html#TextualData
// See also: ExifTool on CPAN.
{ "Raw profile type exif", ProcessRawProfile, METADATA_OFFSET(exif) },
{ "Raw profile type xmp", ProcessRawProfile, METADATA_OFFSET(xmp) },
// Exiftool puts exif data in APP1 chunk, too.
{ "Raw profile type APP1", ProcessRawProfile, METADATA_OFFSET(exif) },
// XMP Specification Part 3, Section 3 #PNG
{ "XML:com.adobe.xmp", MetadataCopy, METADATA_OFFSET(xmp) },
{ NULL, NULL, 0 },
};
// Looks for metadata at both the beginning and end of the PNG file, giving
// preference to the head.
// Returns true on success. The caller must use MetadataFree() on 'metadata' in
// all cases.
static int ExtractMetadataFromPNG(png_structp png,
png_infop const head_info,
png_infop const end_info,
Metadata* const metadata) {
int p;
for (p = 0; p < 2; ++p) {
png_infop const info = (p == 0) ? head_info : end_info;
png_textp text = NULL;
const png_uint_32 num = png_get_text(png, info, &text, NULL);
png_uint_32 i;
// Look for EXIF / XMP metadata.
for (i = 0; i < num; ++i, ++text) {
int j;
for (j = 0; kPNGMetadataMap[j].name != NULL; ++j) {
if (!strcmp(text->key, kPNGMetadataMap[j].name)) {
MetadataPayload* const payload =
(MetadataPayload*)((uint8_t*)metadata +
kPNGMetadataMap[j].storage_offset);
png_size_t text_length;
switch (text->compression) {
#ifdef PNG_iTXt_SUPPORTED
case PNG_ITXT_COMPRESSION_NONE:
case PNG_ITXT_COMPRESSION_zTXt:
text_length = text->itxt_length;
break;
#endif
case PNG_TEXT_COMPRESSION_NONE:
case PNG_TEXT_COMPRESSION_zTXt:
default:
text_length = text->text_length;
break;
}
if (payload->bytes != NULL) {
fprintf(stderr, "Ignoring additional '%s'\n", text->key);
} else if (!kPNGMetadataMap[j].process(text->text, text_length,
payload)) {
fprintf(stderr, "Failed to process: '%s'\n", text->key);
return 0;
}
break;
}
}
}
// Look for an ICC profile.
{
png_charp name;
int comp_type;
#if ((PNG_LIBPNG_VER_MAJOR << 8) | PNG_LIBPNG_VER_MINOR << 0) < \
((1 << 8) | (5 << 0))
png_charp profile;
#else // >= libpng 1.5.0
png_bytep profile;
#endif
png_uint_32 len;
if (png_get_iCCP(png, info,
&name, &comp_type, &profile, &len) == PNG_INFO_iCCP) {
if (!MetadataCopy((const char*)profile, len, &metadata->iccp)) return 0;
}
}
}
return 1;
}
typedef struct {
const uint8_t* data;
size_t data_size;
png_size_t offset;
} PNGReadContext;
static void ReadFunc(png_structp png_ptr, png_bytep data, png_size_t length) {
PNGReadContext* const ctx = (PNGReadContext*)png_get_io_ptr(png_ptr);
if (ctx->data_size - ctx->offset < length) {
png_error(png_ptr, "ReadFunc: invalid read length (overflow)!");
}
memcpy(data, ctx->data + ctx->offset, length);
ctx->offset += length;
}
int ReadPNG(const uint8_t* const data, size_t data_size,
struct WebPPicture* const pic,
int keep_alpha, struct Metadata* const metadata) {
volatile png_structp png = NULL;
volatile png_infop info = NULL;
volatile png_infop end_info = NULL;
PNGReadContext context = { NULL, 0, 0 };
int color_type, bit_depth, interlaced;
int has_alpha;
int num_passes;
int p;
volatile int ok = 0;
png_uint_32 width, height, y;
png_uint_32 stride;
uint8_t* volatile rgb = NULL;
context.data = data;
context.data_size = data_size;
png = png_create_read_struct(PNG_LIBPNG_VER_STRING, 0, 0, 0);
if (png == NULL) goto End;
png_set_error_fn(png, 0, error_function, NULL);
if (setjmp(png_jmpbuf(png))) {
Error:
MetadataFree(metadata);
goto End;
}
info = png_create_info_struct(png);
if (info == NULL) goto Error;
end_info = png_create_info_struct(png);
if (end_info == NULL) goto Error;
png_set_read_fn(png, &context, ReadFunc);
png_read_info(png, info);
if (!png_get_IHDR(png, info,
&width, &height, &bit_depth, &color_type, &interlaced,
NULL, NULL)) goto Error;
png_set_strip_16(png);
png_set_packing(png);
if (color_type == PNG_COLOR_TYPE_PALETTE) {
png_set_palette_to_rgb(png);
}
if (color_type == PNG_COLOR_TYPE_GRAY ||
color_type == PNG_COLOR_TYPE_GRAY_ALPHA) {
if (bit_depth < 8) {
png_set_expand_gray_1_2_4_to_8(png);
}
png_set_gray_to_rgb(png);
}
if (png_get_valid(png, info, PNG_INFO_tRNS)) {
png_set_tRNS_to_alpha(png);
has_alpha = 1;
} else {
has_alpha = !!(color_type & PNG_COLOR_MASK_ALPHA);
}
if (!keep_alpha) {
png_set_strip_alpha(png);
has_alpha = 0;
}
num_passes = png_set_interlace_handling(png);
png_read_update_info(png, info);
stride = (has_alpha ? 4 : 3) * width * sizeof(*rgb);
rgb = (uint8_t*)malloc(stride * height);
if (rgb == NULL) goto Error;
for (p = 0; p < num_passes; ++p) {
for (y = 0; y < height; ++y) {
png_bytep row = (png_bytep)(rgb + y * stride);
png_read_rows(png, &row, NULL, 1);
}
}
png_read_end(png, end_info);
if (metadata != NULL &&
!ExtractMetadataFromPNG(png, info, end_info, metadata)) {
fprintf(stderr, "Error extracting PNG metadata!\n");
goto Error;
}
pic->width = (int)width;
pic->height = (int)height;
ok = has_alpha ? WebPPictureImportRGBA(pic, rgb, (int)stride)
: WebPPictureImportRGB(pic, rgb, (int)stride);
if (!ok) {
goto Error;
}
End:
if (png != NULL) {
png_destroy_read_struct((png_structpp)&png,
(png_infopp)&info, (png_infopp)&end_info);
}
free(rgb);
return ok;
}
#else // !WEBP_HAVE_PNG
int ReadPNG(const uint8_t* const data, size_t data_size,
struct WebPPicture* const pic,
int keep_alpha, struct Metadata* const metadata) {
(void)data;
(void)data_size;
(void)pic;
(void)keep_alpha;
(void)metadata;
fprintf(stderr, "PNG support not compiled. Please install the libpng "
"development package before building.\n");
return 0;
}
#endif // WEBP_HAVE_PNG
// -----------------------------------------------------------------------------

37
examples/pngdec.h
View File

@ -1,37 +0,0 @@
// Copyright 2012 Google Inc. All Rights Reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the COPYING file in the root of the source
// tree. An additional intellectual property rights grant can be found
// in the file PATENTS. All contributing project authors may
// be found in the AUTHORS file in the root of the source tree.
// -----------------------------------------------------------------------------
//
// PNG decode.
#ifndef WEBP_EXAMPLES_PNGDEC_H_
#define WEBP_EXAMPLES_PNGDEC_H_
#include "webp/types.h"
#ifdef __cplusplus
extern "C" {
#endif
struct Metadata;
struct WebPPicture;
// Reads a PNG from 'data', returning the decoded output in 'pic'.
// Output is RGBA or YUVA, depending on pic->use_argb value.
// If 'keep_alpha' is true and the PNG has an alpha channel, the output is RGBA
// or YUVA. Otherwise, alpha channel is dropped and output is RGB or YUV.
// Returns true on success.
int ReadPNG(const uint8_t* const data, size_t data_size,
struct WebPPicture* const pic,
int keep_alpha, struct Metadata* const metadata);
#ifdef __cplusplus
} // extern "C"
#endif
#endif // WEBP_EXAMPLES_PNGDEC_H_

196
examples/tiffdec.c
View File

@ -1,196 +0,0 @@
// Copyright 2012 Google Inc. All Rights Reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the COPYING file in the root of the source
// tree. An additional intellectual property rights grant can be found
// in the file PATENTS. All contributing project authors may
// be found in the AUTHORS file in the root of the source tree.
// -----------------------------------------------------------------------------
//
// TIFF decode.
#include "./tiffdec.h"
#ifdef HAVE_CONFIG_H
#include "webp/config.h"
#endif
#include <stdio.h>
#include <string.h>
#ifdef WEBP_HAVE_TIFF
#include <tiffio.h>
#include "webp/encode.h"
#include "./metadata.h"
static const struct {
ttag_t tag;
size_t storage_offset;
} kTIFFMetadataMap[] = {
{ TIFFTAG_ICCPROFILE, METADATA_OFFSET(iccp) },
{ TIFFTAG_XMLPACKET, METADATA_OFFSET(xmp) },
{ 0, 0 },
};
// Returns true on success. The caller must use MetadataFree() on 'metadata' in
// all cases.
static int ExtractMetadataFromTIFF(TIFF* const tif, Metadata* const metadata) {
int i;
toff_t exif_ifd_offset;
for (i = 0; kTIFFMetadataMap[i].tag != 0; ++i) {
MetadataPayload* const payload =
(MetadataPayload*)((uint8_t*)metadata +
kTIFFMetadataMap[i].storage_offset);
void* tag_data;
uint32 tag_data_len;
if (TIFFGetField(tif, kTIFFMetadataMap[i].tag, &tag_data_len, &tag_data) &&
!MetadataCopy((const char*)tag_data, tag_data_len, payload)) {
return 0;
}
}
// TODO(jzern): To extract the raw EXIF directory some parsing of it would be
// necessary to determine the overall size. In addition, value offsets in
// individual directory entries may need to be updated as, depending on the
// type, they are file based.
// Exif 2.2 Section 4.6.2 Tag Structure
// TIFF Revision 6.0 Part 1 Section 2 TIFF Structure #Image File Directory
if (TIFFGetField(tif, TIFFTAG_EXIFIFD, &exif_ifd_offset)) {
fprintf(stderr, "Warning: EXIF extraction from TIFF is unsupported.\n");
}
return 1;
}
// Ad-hoc structure to supply read-from-memory functionalities.
typedef struct {
const uint8_t* data;
toff_t size;
toff_t pos;
} MyData;
static int MyClose(thandle_t opaque) {
(void)opaque;
return 0;
}
static toff_t MySize(thandle_t opaque) {
const MyData* const my_data = (MyData*)opaque;
return my_data->size;
}
static toff_t MySeek(thandle_t opaque, toff_t offset, int whence) {
MyData* const my_data = (MyData*)opaque;
offset += (whence == SEEK_CUR) ? my_data->pos
: (whence == SEEK_SET) ? 0
: my_data->size;
if (offset > my_data->size) return (toff_t)-1;
my_data->pos = offset;
return offset;
}
static int MyMapFile(thandle_t opaque, void** base, toff_t* size) {
(void)opaque;
(void)base;
(void)size;
return 0;
}
static void MyUnmapFile(thandle_t opaque, void* base, toff_t size) {
(void)opaque;
(void)base;
(void)size;
}
static tsize_t MyRead(thandle_t opaque, void* dst, tsize_t size) {
MyData* const my_data = (MyData*)opaque;
if (my_data->pos + size > my_data->size) {
size = my_data->size - my_data->pos;
}
if (size > 0) {
memcpy(dst, my_data->data + my_data->pos, size);
my_data->pos += size;
}
return size;
}
int ReadTIFF(const uint8_t* const data, size_t data_size,
WebPPicture* const pic, int keep_alpha,
Metadata* const metadata) {
MyData my_data = { data, (toff_t)data_size, 0 };
TIFF* const tif = TIFFClientOpen("Memory", "r", &my_data,
MyRead, MyRead, MySeek, MyClose,
MySize, MyMapFile, MyUnmapFile);
uint32 width, height;
uint32* raster;
int ok = 0;
tdir_t dircount;
if (tif == NULL) {
fprintf(stderr, "Error! Cannot parse TIFF file\n");
return 0;
}
dircount = TIFFNumberOfDirectories(tif);
if (dircount > 1) {
fprintf(stderr, "Warning: multi-directory TIFF files are not supported.\n"
"Only the first will be used, %d will be ignored.\n",
dircount - 1);
}
if (!(TIFFGetField(tif, TIFFTAG_IMAGEWIDTH, &width) &&
TIFFGetField(tif, TIFFTAG_IMAGELENGTH, &height))) {
fprintf(stderr, "Error! Cannot retrieve TIFF image dimensions.\n");
goto End;
}
raster = (uint32*)_TIFFmalloc(width * height * sizeof(*raster));
if (raster != NULL) {
if (TIFFReadRGBAImageOriented(tif, width, height, raster,
ORIENTATION_TOPLEFT, 1)) {
const int stride = width * sizeof(*raster);
pic->width = width;
pic->height = height;
// TIFF data is ABGR
#ifdef WORDS_BIGENDIAN
TIFFSwabArrayOfLong(raster, width * height);
#endif
ok = keep_alpha
? WebPPictureImportRGBA(pic, (const uint8_t*)raster, stride)
: WebPPictureImportRGBX(pic, (const uint8_t*)raster, stride);
}
_TIFFfree(raster);
} else {
fprintf(stderr, "Error allocating TIFF RGBA memory!\n");
}
if (ok) {
if (metadata != NULL) {
ok = ExtractMetadataFromTIFF(tif, metadata);
if (!ok) {
fprintf(stderr, "Error extracting TIFF metadata!\n");
MetadataFree(metadata);
WebPPictureFree(pic);
}
}
}
End:
TIFFClose(tif);
return ok;
}
#else // !WEBP_HAVE_TIFF
int ReadTIFF(const uint8_t* const data, size_t data_size,
struct WebPPicture* const pic, int keep_alpha,
struct Metadata* const metadata) {
(void)data;
(void)data_size;
(void)pic;
(void)keep_alpha;
(void)metadata;
fprintf(stderr, "TIFF support not compiled. Please install the libtiff "
"development package before building.\n");
return 0;
}
#endif // WEBP_HAVE_TIFF
// -----------------------------------------------------------------------------

37
examples/tiffdec.h
View File

@ -1,37 +0,0 @@
// Copyright 2012 Google Inc. All Rights Reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the COPYING file in the root of the source
// tree. An additional intellectual property rights grant can be found
// in the file PATENTS. All contributing project authors may
// be found in the AUTHORS file in the root of the source tree.
// -----------------------------------------------------------------------------
//
// TIFF decode.
#ifndef WEBP_EXAMPLES_TIFFDEC_H_
#define WEBP_EXAMPLES_TIFFDEC_H_
#include "webp/types.h"
#ifdef __cplusplus
extern "C" {
#endif
struct Metadata;
struct WebPPicture;
// Reads a TIFF from 'data', returning the decoded output in 'pic'.
// Output is RGBA or YUVA, depending on pic->use_argb value.
// If 'keep_alpha' is true and the TIFF has an alpha channel, the output is RGBA
// or YUVA. Otherwise, alpha channel is dropped and output is RGB or YUV.
// Returns true on success.
int ReadTIFF(const uint8_t* const data, size_t data_size,
struct WebPPicture* const pic, int keep_alpha,
struct Metadata* const metadata);
#ifdef __cplusplus
} // extern "C"
#endif
#endif // WEBP_EXAMPLES_TIFFDEC_H_

2
examples/vwebp.c
View File

@ -36,7 +36,7 @@
#include "webp/decode.h"
#include "webp/demux.h"
#include "./example_util.h"
#include "../imageio/example_util.h"
#if defined(_MSC_VER) && _MSC_VER < 1900
#define snprintf _snprintf

95
examples/webpdec.c
View File

@ -1,95 +0,0 @@
// Copyright 2014 Google Inc. All Rights Reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the COPYING file in the root of the source
// tree. An additional intellectual property rights grant can be found
// in the file PATENTS. All contributing project authors may
// be found in the AUTHORS file in the root of the source tree.
// -----------------------------------------------------------------------------
//
// WebP decode.
#include "./webpdec.h"
#include <stdio.h>
#include <stdlib.h>
#include "webp/decode.h"
#include "webp/encode.h"
#include "./example_util.h"
#include "./metadata.h"
int ReadWebP(const uint8_t* const data, size_t data_size,
WebPPicture* const pic,
int keep_alpha, Metadata* const metadata) {
int ok = 0;
VP8StatusCode status = VP8_STATUS_OK;
WebPDecoderConfig config;
WebPDecBuffer* const output_buffer = &config.output;
WebPBitstreamFeatures* const bitstream = &config.input;
// TODO(jzern): add Exif/XMP/ICC extraction.
if (metadata != NULL) {
fprintf(stderr, "Warning: metadata extraction from WebP is unsupported.\n");
}
if (!WebPInitDecoderConfig(&config)) {
fprintf(stderr, "Library version mismatch!\n");
return 0;
}
status = WebPGetFeatures(data, data_size, bitstream);
if (status != VP8_STATUS_OK) {
ExUtilPrintWebPError("input data", status);
return 0;
}
{
const int has_alpha = keep_alpha && bitstream->has_alpha;
if (pic->use_argb) {
output_buffer->colorspace = has_alpha ? MODE_RGBA : MODE_RGB;
} else {
output_buffer->colorspace = has_alpha ? MODE_YUVA : MODE_YUV;
}
status = ExUtilDecodeWebP(data, data_size, 0, &config);
if (status == VP8_STATUS_OK) {
pic->width = output_buffer->width;
pic->height = output_buffer->height;
if (pic->use_argb) {
const uint8_t* const rgba = output_buffer->u.RGBA.rgba;
const int stride = output_buffer->u.RGBA.stride;
ok = has_alpha ? WebPPictureImportRGBA(pic, rgba, stride)
: WebPPictureImportRGB(pic, rgba, stride);
} else {
pic->colorspace = has_alpha ? WEBP_YUV420A : WEBP_YUV420;
ok = WebPPictureAlloc(pic);
if (!ok) {
status = VP8_STATUS_OUT_OF_MEMORY;
} else {
const WebPYUVABuffer* const yuva = &output_buffer->u.YUVA;
const int uv_width = (pic->width + 1) >> 1;
const int uv_height = (pic->height + 1) >> 1;
ExUtilCopyPlane(yuva->y, yuva->y_stride,
pic->y, pic->y_stride, pic->width, pic->height);
ExUtilCopyPlane(yuva->u, yuva->u_stride,
pic->u, pic->uv_stride, uv_width, uv_height);
ExUtilCopyPlane(yuva->v, yuva->v_stride,
pic->v, pic->uv_stride, uv_width, uv_height);
if (has_alpha) {
ExUtilCopyPlane(yuva->a, yuva->a_stride,
pic->a, pic->a_stride, pic->width, pic->height);
}
}
}
}
}
if (status != VP8_STATUS_OK) {
ExUtilPrintWebPError("input data", status);
}
WebPFreeDecBuffer(output_buffer);
return ok;
}
// -----------------------------------------------------------------------------

37
examples/webpdec.h
View File

@ -1,37 +0,0 @@
// Copyright 2014 Google Inc. All Rights Reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the COPYING file in the root of the source
// tree. An additional intellectual property rights grant can be found
// in the file PATENTS. All contributing project authors may
// be found in the AUTHORS file in the root of the source tree.
// -----------------------------------------------------------------------------
//
// WebP decode.
#ifndef WEBP_EXAMPLES_WEBPDEC_H_
#define WEBP_EXAMPLES_WEBPDEC_H_
#include "webp/types.h"
#ifdef __cplusplus
extern "C" {
#endif
struct Metadata;
struct WebPPicture;
// Reads a WebP from 'in_file', returning the decoded output in 'pic'.
// Output is RGBA or YUVA, depending on pic->use_argb value.
// If 'keep_alpha' is true and the WebP has an alpha channel, the output is RGBA
// or YUVA. Otherwise, alpha channel is dropped and output is RGB or YUV.
// Returns true on success.
int ReadWebP(const uint8_t* const data, size_t data_size,
struct WebPPicture* const pic,
int keep_alpha, struct Metadata* const metadata);
#ifdef __cplusplus
} // extern "C"
#endif
#endif // WEBP_EXAMPLES_WEBPDEC_H_

2
examples/webpmux.c
View File

@ -55,7 +55,7 @@
#include <string.h>
#include "webp/decode.h"
#include "webp/mux.h"
#include "./example_util.h"
#include "../imageio/example_util.h"
//------------------------------------------------------------------------------
// Config object to parse command-line arguments.

389
examples/wicdec.c
View File

@ -1,389 +0,0 @@
// Copyright 2013 Google Inc. All Rights Reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the COPYING file in the root of the source
// tree. An additional intellectual property rights grant can be found
// in the file PATENTS. All contributing project authors may
// be found in the AUTHORS file in the root of the source tree.
// -----------------------------------------------------------------------------
//
// Windows Imaging Component (WIC) decode.
#include "./wicdec.h"
#ifdef HAVE_CONFIG_H
#include "webp/config.h"
#endif
#include <assert.h>
#include <stdio.h>
#include <string.h>
#ifdef HAVE_WINCODEC_H
#ifdef __MINGW32__
#define INITGUID // Without this GUIDs are declared extern and fail to link
#endif
#define CINTERFACE
#define COBJMACROS
#define _WIN32_IE 0x500 // Workaround bug in shlwapi.h when compiling C++
// code with COBJMACROS.
#include <ole2.h> // CreateStreamOnHGlobal()
#include <shlwapi.h>
#include <windows.h>
#include <wincodec.h>
#include "webp/encode.h"
#include "./example_util.h"
#include "./metadata.h"
#define IFS(fn) \
do { \
if (SUCCEEDED(hr)) { \
hr = (fn); \
if (FAILED(hr)) fprintf(stderr, #fn " failed %08lx\n", hr); \
} \
} while (0)
// modified version of DEFINE_GUID from guiddef.h.
#define WEBP_DEFINE_GUID(name, l, w1, w2, b1, b2, b3, b4, b5, b6, b7, b8) \
static const GUID name = \
{ l, w1, w2, { b1, b2, b3, b4, b5, b6, b7, b8 } }
#ifdef __cplusplus
#define MAKE_REFGUID(x) (x)
#else
#define MAKE_REFGUID(x) &(x)
#endif
typedef struct WICFormatImporter {
const GUID* pixel_format;
int bytes_per_pixel;
int (*import)(WebPPicture* const, const uint8_t* const, int);
} WICFormatImporter;
// From Microsoft SDK 7.0a -- wincodec.h
// Create local copies for compatibility when building against earlier
// versions of the SDK.
WEBP_DEFINE_GUID(GUID_WICPixelFormat24bppBGR_,
0x6fddc324, 0x4e03, 0x4bfe,
0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x0c);
WEBP_DEFINE_GUID(GUID_WICPixelFormat24bppRGB_,
0x6fddc324, 0x4e03, 0x4bfe,
0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x0d);
WEBP_DEFINE_GUID(GUID_WICPixelFormat32bppBGRA_,
0x6fddc324, 0x4e03, 0x4bfe,
0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x0f);
WEBP_DEFINE_GUID(GUID_WICPixelFormat32bppRGBA_,
0xf5c7ad2d, 0x6a8d, 0x43dd,
0xa7, 0xa8, 0xa2, 0x99, 0x35, 0x26, 0x1a, 0xe9);
WEBP_DEFINE_GUID(GUID_WICPixelFormat64bppBGRA_,
0x1562ff7c, 0xd352, 0x46f9,
0x97, 0x9e, 0x42, 0x97, 0x6b, 0x79, 0x22, 0x46);
WEBP_DEFINE_GUID(GUID_WICPixelFormat64bppRGBA_,
0x6fddc324, 0x4e03, 0x4bfe,
0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x16);
static HRESULT OpenInputStream(const char* filename, IStream** stream) {
HRESULT hr = S_OK;
if (!strcmp(filename, "-")) {
const uint8_t* data = NULL;
size_t data_size = 0;
const int ok = ExUtilReadFile(filename, &data, &data_size);
if (ok) {
HGLOBAL image = GlobalAlloc(GMEM_MOVEABLE, data_size);
if (image != NULL) {
void* const image_mem = GlobalLock(image);
if (image_mem != NULL) {
memcpy(image_mem, data, data_size);
GlobalUnlock(image);
IFS(CreateStreamOnHGlobal(image, TRUE, stream));
} else {
hr = E_FAIL;
}
} else {
hr = E_OUTOFMEMORY;
}
free((void*)data);
} else {
hr = E_FAIL;
}
} else {
IFS(SHCreateStreamOnFileA(filename, STGM_READ, stream));
}
if (FAILED(hr)) {
fprintf(stderr, "Error opening input file %s (%08lx)\n", filename, hr);
}
return hr;
}
// -----------------------------------------------------------------------------
// Metadata processing
// Stores the first non-zero sized color profile from 'frame' to 'iccp'.
// Returns an HRESULT to indicate success or failure. The caller is responsible
// for freeing 'iccp->bytes' in either case.
static HRESULT ExtractICCP(IWICImagingFactory* const factory,
IWICBitmapFrameDecode* const frame,
MetadataPayload* const iccp) {
HRESULT hr = S_OK;
UINT i, count;
IWICColorContext** color_contexts;
IFS(IWICBitmapFrameDecode_GetColorContexts(frame, 0, NULL, &count));
if (FAILED(hr) || count == 0) return hr;
color_contexts = (IWICColorContext**)calloc(count, sizeof(*color_contexts));
if (color_contexts == NULL) return E_OUTOFMEMORY;
for (i = 0; SUCCEEDED(hr) && i < count; ++i) {
IFS(IWICImagingFactory_CreateColorContext(factory, &color_contexts[i]));
}
if (SUCCEEDED(hr)) {
UINT num_color_contexts;
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));
if (SUCCEEDED(hr) && type == WICColorContextProfile) {
UINT size;
IFS(IWICColorContext_GetProfileBytes(color_contexts[i],
0, NULL, &size));
if (SUCCEEDED(hr) && size > 0) {
iccp->bytes = (uint8_t*)malloc(size);
if (iccp->bytes == NULL) {
hr = E_OUTOFMEMORY;
break;
}
iccp->size = size;
IFS(IWICColorContext_GetProfileBytes(color_contexts[i],
(UINT)iccp->size, iccp->bytes,
&size));
if (SUCCEEDED(hr) && size != iccp->size) {
fprintf(stderr, "Warning! ICC profile size (%u) != expected (%u)\n",
size, (uint32_t)iccp->size);
iccp->size = size;
}
break;
}
}
}
}
for (i = 0; i < count; ++i) {
if (color_contexts[i] != NULL) IUnknown_Release(color_contexts[i]);
}
free(color_contexts);
return hr;
}
static HRESULT ExtractMetadata(IWICImagingFactory* const factory,
IWICBitmapFrameDecode* const frame,
Metadata* const metadata) {
// TODO(jzern): add XMP/EXIF extraction.
const HRESULT hr = ExtractICCP(factory, frame, &metadata->iccp);
if (FAILED(hr)) MetadataFree(metadata);
return hr;
}
// -----------------------------------------------------------------------------
static int HasPalette(GUID pixel_format) {
return (IsEqualGUID(MAKE_REFGUID(pixel_format),
MAKE_REFGUID(GUID_WICPixelFormat1bppIndexed)) ||
IsEqualGUID(MAKE_REFGUID(pixel_format),
MAKE_REFGUID(GUID_WICPixelFormat2bppIndexed)) ||
IsEqualGUID(MAKE_REFGUID(pixel_format),
MAKE_REFGUID(GUID_WICPixelFormat4bppIndexed)) ||
IsEqualGUID(MAKE_REFGUID(pixel_format),
MAKE_REFGUID(GUID_WICPixelFormat8bppIndexed)));
}
static int HasAlpha(IWICImagingFactory* const factory,
IWICBitmapDecoder* const decoder,
IWICBitmapFrameDecode* const frame,
GUID pixel_format) {
int has_alpha;
if (HasPalette(pixel_format)) {
IWICPalette* frame_palette = NULL;
IWICPalette* global_palette = NULL;
BOOL frame_palette_has_alpha = FALSE;
BOOL global_palette_has_alpha = FALSE;
// A palette may exist at the frame or container level,
// check IWICPalette::HasAlpha() for both if present.
if (SUCCEEDED(IWICImagingFactory_CreatePalette(factory, &frame_palette)) &&
SUCCEEDED(IWICBitmapFrameDecode_CopyPalette(frame, frame_palette))) {
IWICPalette_HasAlpha(frame_palette, &frame_palette_has_alpha);
}
if (SUCCEEDED(IWICImagingFactory_CreatePalette(factory, &global_palette)) &&
SUCCEEDED(IWICBitmapDecoder_CopyPalette(decoder, global_palette))) {
IWICPalette_HasAlpha(global_palette, &global_palette_has_alpha);
}
has_alpha = frame_palette_has_alpha || global_palette_has_alpha;
if (frame_palette != NULL) IUnknown_Release(frame_palette);
if (global_palette != NULL) IUnknown_Release(global_palette);
} else {
has_alpha = IsEqualGUID(MAKE_REFGUID(pixel_format),
MAKE_REFGUID(GUID_WICPixelFormat32bppRGBA_)) ||
IsEqualGUID(MAKE_REFGUID(pixel_format),
MAKE_REFGUID(GUID_WICPixelFormat32bppBGRA_)) ||
IsEqualGUID(MAKE_REFGUID(pixel_format),
MAKE_REFGUID(GUID_WICPixelFormat64bppRGBA_)) ||
IsEqualGUID(MAKE_REFGUID(pixel_format),
MAKE_REFGUID(GUID_WICPixelFormat64bppBGRA_));
}
return has_alpha;
}
int ReadPictureWithWIC(const char* const filename,
WebPPicture* const pic, int keep_alpha,
Metadata* const metadata) {
// From Microsoft SDK 6.0a -- ks.h
// Define a local copy to avoid link errors under mingw.
WEBP_DEFINE_GUID(GUID_NULL_, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
static const WICFormatImporter kAlphaFormatImporters[] = {
{ &GUID_WICPixelFormat32bppBGRA_, 4, WebPPictureImportBGRA },
{ &GUID_WICPixelFormat32bppRGBA_, 4, WebPPictureImportRGBA },
{ NULL, 0, NULL },
};
static const WICFormatImporter kNonAlphaFormatImporters[] = {
{ &GUID_WICPixelFormat24bppBGR_, 3, WebPPictureImportBGR },
{ &GUID_WICPixelFormat24bppRGB_, 3, WebPPictureImportRGB },
{ NULL, 0, NULL },
};
HRESULT hr = S_OK;
IWICBitmapFrameDecode* frame = NULL;
IWICFormatConverter* converter = NULL;
IWICImagingFactory* factory = NULL;
IWICBitmapDecoder* decoder = NULL;
IStream* stream = NULL;
UINT frame_count = 0;
UINT width = 0, height = 0;
BYTE* rgb = NULL;
WICPixelFormatGUID src_pixel_format = GUID_WICPixelFormatUndefined;
const WICFormatImporter* importer = NULL;
GUID src_container_format = GUID_NULL_;
static const GUID* kAlphaContainers[] = {
&GUID_ContainerFormatBmp,
&GUID_ContainerFormatPng,
&GUID_ContainerFormatTiff,
NULL
};
int has_alpha = 0;
int stride;
IFS(CoInitialize(NULL));
IFS(CoCreateInstance(MAKE_REFGUID(CLSID_WICImagingFactory), NULL,
CLSCTX_INPROC_SERVER,
MAKE_REFGUID(IID_IWICImagingFactory),
(LPVOID*)&factory));
if (hr == REGDB_E_CLASSNOTREG) {
fprintf(stderr,
"Couldn't access Windows Imaging Component (are you running "
"Windows XP SP3 or newer?). Most formats not available. "
"Use -s for the available YUV input.\n");
}
// Prepare for image decoding.
IFS(OpenInputStream(filename, &stream));
IFS(IWICImagingFactory_CreateDecoderFromStream(
factory, stream, NULL,
WICDecodeMetadataCacheOnDemand, &decoder));
IFS(IWICBitmapDecoder_GetFrameCount(decoder, &frame_count));
if (SUCCEEDED(hr) && frame_count == 0) {
fprintf(stderr, "No frame found in input file.\n");
hr = E_FAIL;
}
IFS(IWICBitmapDecoder_GetFrame(decoder, 0, &frame));
IFS(IWICBitmapFrameDecode_GetPixelFormat(frame, &src_pixel_format));
IFS(IWICBitmapDecoder_GetContainerFormat(decoder, &src_container_format));
if (SUCCEEDED(hr) && keep_alpha) {
const GUID** guid;
for (guid = kAlphaContainers; *guid != NULL; ++guid) {
if (IsEqualGUID(MAKE_REFGUID(src_container_format),
MAKE_REFGUID(**guid))) {
has_alpha = HasAlpha(factory, decoder, frame, src_pixel_format);
break;
}
}
}
// Prepare for pixel format conversion (if necessary).
IFS(IWICImagingFactory_CreateFormatConverter(factory, &converter));
for (importer = has_alpha ? kAlphaFormatImporters : kNonAlphaFormatImporters;
hr == S_OK && importer->import != NULL; ++importer) {
BOOL can_convert;
const HRESULT cchr = IWICFormatConverter_CanConvert(
converter,
MAKE_REFGUID(src_pixel_format),
MAKE_REFGUID(*importer->pixel_format),
&can_convert);
if (SUCCEEDED(cchr) && can_convert) break;
}
if (importer->import == NULL) hr = E_FAIL;
IFS(IWICFormatConverter_Initialize(converter, (IWICBitmapSource*)frame,
importer->pixel_format,
WICBitmapDitherTypeNone,
NULL, 0.0, WICBitmapPaletteTypeCustom));
// Decode.
IFS(IWICFormatConverter_GetSize(converter, &width, &height));
stride = importer->bytes_per_pixel * width * sizeof(*rgb);
if (SUCCEEDED(hr)) {
rgb = (BYTE*)malloc(stride * height);
if (rgb == NULL)
hr = E_OUTOFMEMORY;
}
IFS(IWICFormatConverter_CopyPixels(converter, NULL,
stride, stride * height, rgb));
// WebP conversion.
if (SUCCEEDED(hr)) {
int ok;
pic->width = width;
pic->height = height;
pic->use_argb = 1; // For WIC, we always force to argb
ok = importer->import(pic, rgb, stride);
if (!ok) hr = E_FAIL;
}
if (SUCCEEDED(hr)) {
if (metadata != NULL) {
hr = ExtractMetadata(factory, frame, metadata);
if (FAILED(hr)) {
fprintf(stderr, "Error extracting image metadata using WIC!\n");
}
}
}
// Cleanup.
if (converter != NULL) IUnknown_Release(converter);
if (frame != NULL) IUnknown_Release(frame);
if (decoder != NULL) IUnknown_Release(decoder);
if (factory != NULL) IUnknown_Release(factory);
if (stream != NULL) IUnknown_Release(stream);
free(rgb);
return SUCCEEDED(hr);
}
#else // !HAVE_WINCODEC_H
int ReadPictureWithWIC(const char* const filename,
struct WebPPicture* const pic, int keep_alpha,
struct Metadata* const metadata) {
(void)filename;
(void)pic;
(void)keep_alpha;
(void)metadata;
fprintf(stderr, "Windows Imaging Component (WIC) support not compiled. "
"Visual Studio and mingw-w64 builds support WIC. Make sure "
"wincodec.h detection is working correctly if using autoconf "
"and HAVE_WINCODEC_H is defined before building.\n");
return 0;
}
#endif // HAVE_WINCODEC_H
// -----------------------------------------------------------------------------

34
examples/wicdec.h
View File

@ -1,34 +0,0 @@
// Copyright 2013 Google Inc. All Rights Reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the COPYING file in the root of the source
// tree. An additional intellectual property rights grant can be found
// in the file PATENTS. All contributing project authors may
// be found in the AUTHORS file in the root of the source tree.
// -----------------------------------------------------------------------------
//
// Windows Imaging Component (WIC) decode.
#ifndef WEBP_EXAMPLES_WICDEC_H_
#define WEBP_EXAMPLES_WICDEC_H_
#ifdef __cplusplus
extern "C" {
#endif
struct Metadata;
struct WebPPicture;
// Reads an image from 'filename', returning the decoded output in 'pic'.
// If 'keep_alpha' is true and the image has an alpha channel, the output is
// RGBA otherwise it will be RGB. pic->use_argb is always forced to true.
// Returns true on success.
int ReadPictureWithWIC(const char* const filename,
struct WebPPicture* const pic, int keep_alpha,
struct Metadata* const metadata);
#ifdef __cplusplus
} // extern "C"
#endif
#endif // WEBP_EXAMPLES_WICDEC_H_