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libimageenc.a: extract image-saving code from dwebp

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BUG=webp:277
Change-Id: I2c0e1df7b13b1f77474b5478048fef022e90f77a
This commit is contained in:
Pascal Massimino
2016-09-06 22:46:31 -07:00
committed by James Zern
parent 9e478f808e
commit af1ad3e2dd
11 changed files with 736 additions and 507 deletions
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14
CMakeLists.txt
View File

@@ -128,6 +128,14 @@ if(WEBP_BUILD_CWEBP OR WEBP_BUILD_DWEBP)
add_library(imagedec ${imagedec_SRCS})
target_link_libraries(imagedec webp ${WEBP_DEP_LIBRARIES}
${WEBP_DEP_IMG_LIBRARIES})
# Image-encoding utility library.
set(imageenc_SRCS
${CMAKE_CURRENT_SOURCE_DIR}/imageio/image_enc.c
${CMAKE_CURRENT_SOURCE_DIR}/imageio/image_enc.h)
add_library(imageenc ${imageenc_SRCS})
target_link_libraries(imageenc webp imageioutil
${WEBP_DEP_LIBRARIES} ${WEBP_DEP_IMG_LIBRARIES})
endif()
if(WEBP_BUILD_DWEBP)
@@ -135,9 +143,9 @@ if(WEBP_BUILD_DWEBP)
include_directories(${WEBP_DEP_IMG_INCLUDE_DIRS})
add_executable(dwebp
${CMAKE_CURRENT_SOURCE_DIR}/examples/dwebp.c
${CMAKE_CURRENT_SOURCE_DIR}/examples/stopwatch.h
)
target_link_libraries(dwebp imagedec webp exampleutil imageioutil
${CMAKE_CURRENT_SOURCE_DIR}/examples/stopwatch.h)
target_link_libraries(dwebp imagedec imageenc webp
exampleutil imageioutil
${WEBP_DEP_LIBRARIES} ${WEBP_DEP_IMG_LIBRARIES}
)
endif()

13
Makefile.vc
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@@ -251,7 +251,7 @@ DSP_ENC_OBJS = \
EX_ANIM_UTIL_OBJS = \
$(DIROBJ)\examples\anim_util.obj \
EX_FORMAT_DEC_OBJS = \
IMAGEIO_DEC_OBJS = \
$(DIROBJ)\imageio\image_dec.obj \
$(DIROBJ)\imageio\jpegdec.obj \
$(DIROBJ)\imageio\metadata.obj \
@@ -260,6 +260,9 @@ EX_FORMAT_DEC_OBJS = \
$(DIROBJ)\imageio\webpdec.obj \
$(DIROBJ)\imageio\wicdec.obj \
IMAGEIO_ENC_OBJS = \
$(DIROBJ)\imageio\image_enc.obj \
EX_GIF_DEC_OBJS = \
$(DIROBJ)\examples\gifdec.obj \
@@ -339,9 +342,10 @@ anim_diff: $(DIRBIN)\anim_diff.exe
$(DIRBIN)\anim_diff.exe: $(DIROBJ)\examples\anim_diff.obj $(EX_ANIM_UTIL_OBJS)
$(DIRBIN)\anim_diff.exe: $(EX_UTIL_OBJS) $(IMAGEIO_UTIL_OBJS)
$(DIRBIN)\anim_diff.exe: $(EX_GIF_DEC_OBJS) $(LIBWEBPDEMUX) $(LIBWEBP)
$(DIRBIN)\cwebp.exe: $(DIROBJ)\examples\cwebp.obj $(EX_FORMAT_DEC_OBJS)
$(DIRBIN)\cwebp.exe: $(DIROBJ)\examples\cwebp.obj $(IMAGEIO_DEC_OBJS)
$(DIRBIN)\cwebp.exe: $(IMAGEIO_UTIL_OBJS)
$(DIRBIN)\dwebp.exe: $(DIROBJ)\examples\dwebp.obj $(EX_FORMAT_DEC_OBJS)
$(DIRBIN)\dwebp.exe: $(DIROBJ)\examples\dwebp.obj $(IMAGEIO_DEC_OBJS)
$(DIRBIN)\dwebp.exe: $(IMAGEIO_ENC_OBJS)
$(DIRBIN)\dwebp.exe: $(IMAGEIO_UTIL_OBJS)
$(DIRBIN)\gif2webp.exe: $(DIROBJ)\examples\gif2webp.obj $(EX_GIF_DEC_OBJS)
$(DIRBIN)\gif2webp.exe: $(EX_UTIL_OBJS) $(IMAGEIO_UTIL_OBJS) $(LIBWEBPMUX)
@@ -351,7 +355,8 @@ $(DIRBIN)\vwebp.exe: $(IMAGEIO_UTIL_OBJS) $(LIBWEBPDEMUX) $(LIBWEBP)
$(DIRBIN)\webpmux.exe: $(DIROBJ)\examples\webpmux.obj $(LIBWEBPMUX)
$(DIRBIN)\webpmux.exe: $(EX_UTIL_OBJS) $(IMAGEIO_UTIL_OBJS) $(LIBWEBP)
$(OUT_EXAMPLES): $(EX_UTIL_OBJS) $(LIBWEBP)
$(EX_UTIL_OBJS) $(EX_FORMAT_DEC_OBJS) $(IMAGEIO_UTIL_OBJS): $(OUTPUT_DIRS)
$(EX_UTIL_OBJS) $(IMAGEIO_UTIL_OBJS): $(OUTPUT_DIRS)
$(IMAGEIO_DEC_OBJS) $(IMAGEIO_ENC_OBJS): $(OUTPUT_DIRS)
!ENDIF # ARCH == ARM
experimental:

19
build.gradle
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@@ -292,6 +292,24 @@ model {
}
}
}
imageenc(NativeLibrarySpec) {
binaries {
all {
lib library: "webp", linkage: "static"
lib library: "imageio_util", linkage: "static"
}
}
sources {
c {
source {
srcDir "./imageio"
include "image_enc.c"
}
}
}
}
cwebp(NativeExecutableSpec) {
binaries {
all {
@@ -316,6 +334,7 @@ model {
all {
lib library: "example_util", linkage: "static"
lib library: "imagedec", linkage: "static"
lib library: "imageenc", linkage: "static"
lib library: "imageio_util", linkage: "static"
lib library: "webp"
}

2
examples/Android.mk
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@@ -43,7 +43,7 @@ LOCAL_SRC_FILES := \
LOCAL_CFLAGS := $(WEBP_CFLAGS)
LOCAL_C_INCLUDES := $(LOCAL_PATH)/../src
LOCAL_STATIC_LIBRARIES := example_util imageio_util imagedec webp
LOCAL_STATIC_LIBRARIES := example_util imageio_util imagedec imageenc webp
LOCAL_MODULE := dwebp

7
examples/Makefile.am
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@@ -34,8 +34,11 @@ cwebp_LDADD += $(JPEG_LIBS) $(PNG_LIBS) $(TIFF_LIBS)
dwebp_SOURCES = dwebp.c stopwatch.h
dwebp_CPPFLAGS = $(AM_CPPFLAGS) $(USE_EXPERIMENTAL_CODE)
dwebp_CPPFLAGS += $(JPEG_INCLUDES) $(PNG_INCLUDES)
dwebp_LDADD = libexample_util.la ../imageio/libimageio_util.la
dwebp_LDADD += ../imageio/libimagedec.la ../src/libwebp.la
dwebp_LDADD = libexample_util.la
dwebp_LDADD += ../imageio/libimagedec.la
dwebp_LDADD += ../imageio/libimageenc.la
dwebp_LDADD += ../imageio/libimageio_util.la
dwebp_LDADD += ../src/libwebp.la
dwebp_LDADD +=$(PNG_LIBS) $(JPEG_LIBS)
gif2webp_SOURCES = gif2webp.c gifdec.c gifdec.h

500
examples/dwebp.c
View File

@@ -20,28 +20,8 @@
#include "webp/config.h"
#endif
#ifdef WEBP_HAVE_PNG
#include <png.h>
#include <setjmp.h> // note: this must be included *after* png.h
#endif
#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>
#endif
#include "webp/decode.h"
#include "../examples/example_util.h"
#include "../imageio/imageio_util.h"
#include "../imageio/image_enc.h"
#include "../imageio/webpdec.h"
#include "./stopwatch.h"
@@ -59,486 +39,18 @@ extern void* VP8GetCPUInfo; // opaque forward declaration.
#endif
#endif // WEBP_DLL
//------------------------------------------------------------------------------
// Output types
typedef enum {
PNG = 0,
PAM,
PPM,
PGM,
BMP,
TIFF,
RAW_YUV,
ALPHA_PLANE_ONLY, // this is for experimenting only
// forced colorspace output (for testing, mostly)
RGB, RGBA, BGR, BGRA, ARGB,
RGBA_4444, RGB_565,
rgbA, bgrA, Argb, rgbA_4444,
YUV, YUVA
} OutputFileFormat;
#ifdef HAVE_WINCODEC_H
#define IFS(fn) \
do { \
if (SUCCEEDED(hr)) { \
hr = (fn); \
if (FAILED(hr)) fprintf(stderr, #fn " failed %08lx\n", hr); \
} \
} while (0)
#ifdef __cplusplus
#define MAKE_REFGUID(x) (x)
#else
#define MAKE_REFGUID(x) &(x)
#endif
static HRESULT CreateOutputStream(const char* out_file_name,
int write_to_mem, IStream** stream) {
HRESULT hr = S_OK;
if (write_to_mem) {
// Output to a memory buffer. This is freed when 'stream' is released.
IFS(CreateStreamOnHGlobal(NULL, TRUE, stream));
} else {
IFS(SHCreateStreamOnFileA(out_file_name, STGM_WRITE | STGM_CREATE, stream));
}
if (FAILED(hr)) {
fprintf(stderr, "Error opening output file %s (%08lx)\n",
out_file_name, hr);
}
return hr;
}
static HRESULT WriteUsingWIC(const char* out_file_name, int use_stdout,
REFGUID container_guid,
uint8_t* rgb, int stride,
uint32_t width, uint32_t height, int has_alpha) {
HRESULT hr = S_OK;
IWICImagingFactory* factory = NULL;
IWICBitmapFrameEncode* frame = NULL;
IWICBitmapEncoder* encoder = NULL;
IStream* stream = NULL;
WICPixelFormatGUID pixel_format = has_alpha ? GUID_WICPixelFormat32bppBGRA
: GUID_WICPixelFormat24bppBGR;
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?). PNG support not available. "
"Use -ppm or -pgm for available PPM and PGM formats.\n");
}
IFS(CreateOutputStream(out_file_name, use_stdout, &stream));
IFS(IWICImagingFactory_CreateEncoder(factory, container_guid, NULL,
&encoder));
IFS(IWICBitmapEncoder_Initialize(encoder, stream,
WICBitmapEncoderNoCache));
IFS(IWICBitmapEncoder_CreateNewFrame(encoder, &frame, NULL));
IFS(IWICBitmapFrameEncode_Initialize(frame, NULL));
IFS(IWICBitmapFrameEncode_SetSize(frame, width, height));
IFS(IWICBitmapFrameEncode_SetPixelFormat(frame, &pixel_format));
IFS(IWICBitmapFrameEncode_WritePixels(frame, height, stride,
height * stride, rgb));
IFS(IWICBitmapFrameEncode_Commit(frame));
IFS(IWICBitmapEncoder_Commit(encoder));
if (SUCCEEDED(hr) && use_stdout) {
HGLOBAL image;
IFS(GetHGlobalFromStream(stream, &image));
if (SUCCEEDED(hr)) {
HANDLE std_output = GetStdHandle(STD_OUTPUT_HANDLE);
DWORD mode;
const BOOL update_mode = GetConsoleMode(std_output, &mode);
const void* const image_mem = GlobalLock(image);
DWORD bytes_written = 0;
// Clear output processing if necessary, then output the image.
if (update_mode) SetConsoleMode(std_output, 0);
if (!WriteFile(std_output, image_mem, (DWORD)GlobalSize(image),
&bytes_written, NULL) ||
bytes_written != GlobalSize(image)) {
hr = E_FAIL;
}
if (update_mode) SetConsoleMode(std_output, mode);
GlobalUnlock(image);
}
}
if (frame != NULL) IUnknown_Release(frame);
if (encoder != NULL) IUnknown_Release(encoder);
if (factory != NULL) IUnknown_Release(factory);
if (stream != NULL) IUnknown_Release(stream);
return hr;
}
static int WritePNG(const char* out_file_name, int use_stdout,
const WebPDecBuffer* const buffer) {
const uint32_t width = buffer->width;
const uint32_t height = buffer->height;
uint8_t* const rgb = buffer->u.RGBA.rgba;
const int stride = buffer->u.RGBA.stride;
const int has_alpha = WebPIsAlphaMode(buffer->colorspace);
return SUCCEEDED(WriteUsingWIC(out_file_name, use_stdout,
MAKE_REFGUID(GUID_ContainerFormatPng),
rgb, stride, width, height, has_alpha));
}
#elif defined(WEBP_HAVE_PNG) // !HAVE_WINCODEC_H
static void PNGAPI PNGErrorFunction(png_structp png, png_const_charp dummy) {
(void)dummy; // remove variable-unused warning
longjmp(png_jmpbuf(png), 1);
}
static int WritePNG(FILE* out_file, const WebPDecBuffer* const buffer) {
const uint32_t width = buffer->width;
const uint32_t height = buffer->height;
uint8_t* const rgb = buffer->u.RGBA.rgba;
const int stride = buffer->u.RGBA.stride;
const int has_alpha = WebPIsAlphaMode(buffer->colorspace);
volatile png_structp png;
volatile png_infop info;
png_uint_32 y;
png = png_create_write_struct(PNG_LIBPNG_VER_STRING,
NULL, PNGErrorFunction, NULL);
if (png == NULL) {
return 0;
}
info = png_create_info_struct(png);
if (info == NULL) {
png_destroy_write_struct((png_structpp)&png, NULL);
return 0;
}
if (setjmp(png_jmpbuf(png))) {
png_destroy_write_struct((png_structpp)&png, (png_infopp)&info);
return 0;
}
png_init_io(png, out_file);
png_set_IHDR(png, info, width, height, 8,
has_alpha ? PNG_COLOR_TYPE_RGBA : PNG_COLOR_TYPE_RGB,
PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT,
PNG_FILTER_TYPE_DEFAULT);
png_write_info(png, info);
for (y = 0; y < height; ++y) {
png_bytep row = rgb + y * stride;
png_write_rows(png, &row, 1);
}
png_write_end(png, info);
png_destroy_write_struct((png_structpp)&png, (png_infopp)&info);
return 1;
}
#else // !HAVE_WINCODEC_H && !WEBP_HAVE_PNG
static int WritePNG(FILE* out_file, const WebPDecBuffer* const buffer) {
(void)out_file;
(void)buffer;
fprintf(stderr, "PNG support not compiled. Please install the libpng "
"development package before building.\n");
fprintf(stderr, "You can run with -ppm flag to decode in PPM format.\n");
return 0;
}
#endif
static int WritePPM(FILE* fout, const WebPDecBuffer* const buffer, int alpha) {
const uint32_t width = buffer->width;
const uint32_t height = buffer->height;
const uint8_t* const rgb = buffer->u.RGBA.rgba;
const int stride = buffer->u.RGBA.stride;
const size_t bytes_per_px = alpha ? 4 : 3;
uint32_t y;
if (alpha) {
fprintf(fout, "P7\nWIDTH %u\nHEIGHT %u\nDEPTH 4\nMAXVAL 255\n"
"TUPLTYPE RGB_ALPHA\nENDHDR\n", width, height);
} else {
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) {
return 0;
}
}
return 1;
}
// Save 16b mode (RGBA4444, RGB565, ...) for debugging purpose.
static int Write16bAsPGM(FILE* fout, const WebPDecBuffer* const buffer) {
const uint32_t width = buffer->width;
const uint32_t height = buffer->height;
const uint8_t* const rgba = buffer->u.RGBA.rgba;
const int stride = buffer->u.RGBA.stride;
const uint32_t bytes_per_px = 2;
uint32_t y;
fprintf(fout, "P5\n%u %u\n255\n", width * bytes_per_px, height);
for (y = 0; y < height; ++y) {
if (fwrite(rgba + y * stride, width, bytes_per_px, fout) != bytes_per_px) {
return 0;
}
}
return 1;
}
static void PutLE16(uint8_t* const dst, uint32_t value) {
dst[0] = (value >> 0) & 0xff;
dst[1] = (value >> 8) & 0xff;
}
static void PutLE32(uint8_t* const dst, uint32_t value) {
PutLE16(dst + 0, (value >> 0) & 0xffff);
PutLE16(dst + 2, (value >> 16) & 0xffff);
}
#define BMP_HEADER_SIZE 54
static int WriteBMP(FILE* fout, const WebPDecBuffer* const buffer) {
const int has_alpha = WebPIsAlphaMode(buffer->colorspace);
const uint32_t width = buffer->width;
const uint32_t height = buffer->height;
const uint8_t* const rgba = buffer->u.RGBA.rgba;
const int stride = buffer->u.RGBA.stride;
const uint32_t bytes_per_px = has_alpha ? 4 : 3;
uint32_t y;
const uint32_t line_size = bytes_per_px * width;
const uint32_t bmp_stride = (line_size + 3) & ~3; // pad to 4
const uint32_t total_size = bmp_stride * height + BMP_HEADER_SIZE;
uint8_t bmp_header[BMP_HEADER_SIZE] = { 0 };
// bitmap file header
PutLE16(bmp_header + 0, 0x4d42); // signature 'BM'
PutLE32(bmp_header + 2, total_size); // size including header
PutLE32(bmp_header + 6, 0); // reserved
PutLE32(bmp_header + 10, BMP_HEADER_SIZE); // offset to pixel array
// bitmap info header
PutLE32(bmp_header + 14, 40); // DIB header size
PutLE32(bmp_header + 18, width); // dimensions
PutLE32(bmp_header + 22, -(int)height); // vertical flip!
PutLE16(bmp_header + 26, 1); // number of planes
PutLE16(bmp_header + 28, bytes_per_px * 8); // bits per pixel
PutLE32(bmp_header + 30, 0); // no compression (BI_RGB)
PutLE32(bmp_header + 34, 0); // image size (dummy)
PutLE32(bmp_header + 38, 2400); // x pixels/meter
PutLE32(bmp_header + 42, 2400); // y pixels/meter
PutLE32(bmp_header + 46, 0); // number of palette colors
PutLE32(bmp_header + 50, 0); // important color count
// TODO(skal): color profile
// write header
if (fwrite(bmp_header, sizeof(bmp_header), 1, fout) != 1) {
return 0;
}
// write pixel array
for (y = 0; y < height; ++y) {
if (fwrite(rgba + y * stride, line_size, 1, fout) != 1) {
return 0;
}
// write padding zeroes
if (bmp_stride != line_size) {
const uint8_t zeroes[3] = { 0 };
if (fwrite(zeroes, bmp_stride - line_size, 1, fout) != 1) {
return 0;
}
}
}
return 1;
}
#undef BMP_HEADER_SIZE
#define NUM_IFD_ENTRIES 15
#define EXTRA_DATA_SIZE 16
// 10b for signature/header + n * 12b entries + 4b for IFD terminator:
#define EXTRA_DATA_OFFSET (10 + 12 * NUM_IFD_ENTRIES + 4)
#define TIFF_HEADER_SIZE (EXTRA_DATA_OFFSET + EXTRA_DATA_SIZE)
static int WriteTIFF(FILE* fout, const WebPDecBuffer* const buffer) {
const int has_alpha = WebPIsAlphaMode(buffer->colorspace);
const uint32_t width = buffer->width;
const uint32_t height = buffer->height;
const uint8_t* const rgba = buffer->u.RGBA.rgba;
const int stride = buffer->u.RGBA.stride;
const uint8_t bytes_per_px = has_alpha ? 4 : 3;
// For non-alpha case, we omit tag 0x152 (ExtraSamples).
const uint8_t num_ifd_entries = has_alpha ? NUM_IFD_ENTRIES
: NUM_IFD_ENTRIES - 1;
uint8_t tiff_header[TIFF_HEADER_SIZE] = {
0x49, 0x49, 0x2a, 0x00, // little endian signature
8, 0, 0, 0, // offset to the unique IFD that follows
// IFD (offset = 8). Entries must be written in increasing tag order.
num_ifd_entries, 0, // Number of entries in the IFD (12 bytes each).
0x00, 0x01, 3, 0, 1, 0, 0, 0, 0, 0, 0, 0, // 10: Width (TBD)
0x01, 0x01, 3, 0, 1, 0, 0, 0, 0, 0, 0, 0, // 22: Height (TBD)
0x02, 0x01, 3, 0, bytes_per_px, 0, 0, 0, // 34: BitsPerSample: 8888
EXTRA_DATA_OFFSET + 0, 0, 0, 0,
0x03, 0x01, 3, 0, 1, 0, 0, 0, 1, 0, 0, 0, // 46: Compression: none
0x06, 0x01, 3, 0, 1, 0, 0, 0, 2, 0, 0, 0, // 58: Photometric: RGB
0x11, 0x01, 4, 0, 1, 0, 0, 0, // 70: Strips offset:
TIFF_HEADER_SIZE, 0, 0, 0, // data follows header
0x12, 0x01, 3, 0, 1, 0, 0, 0, 1, 0, 0, 0, // 82: Orientation: topleft
0x15, 0x01, 3, 0, 1, 0, 0, 0, // 94: SamplesPerPixels
bytes_per_px, 0, 0, 0,
0x16, 0x01, 3, 0, 1, 0, 0, 0, 0, 0, 0, 0, // 106: Rows per strip (TBD)
0x17, 0x01, 4, 0, 1, 0, 0, 0, 0, 0, 0, 0, // 118: StripByteCount (TBD)
0x1a, 0x01, 5, 0, 1, 0, 0, 0, // 130: X-resolution
EXTRA_DATA_OFFSET + 8, 0, 0, 0,
0x1b, 0x01, 5, 0, 1, 0, 0, 0, // 142: Y-resolution
EXTRA_DATA_OFFSET + 8, 0, 0, 0,
0x1c, 0x01, 3, 0, 1, 0, 0, 0, 1, 0, 0, 0, // 154: PlanarConfiguration
0x28, 0x01, 3, 0, 1, 0, 0, 0, 2, 0, 0, 0, // 166: ResolutionUnit (inch)
0x52, 0x01, 3, 0, 1, 0, 0, 0, 1, 0, 0, 0, // 178: ExtraSamples: rgbA
0, 0, 0, 0, // 190: IFD terminator
// EXTRA_DATA_OFFSET:
8, 0, 8, 0, 8, 0, 8, 0, // BitsPerSample
72, 0, 0, 0, 1, 0, 0, 0 // 72 pixels/inch, for X/Y-resolution
};
uint32_t y;
// Fill placeholders in IFD:
PutLE32(tiff_header + 10 + 8, width);
PutLE32(tiff_header + 22 + 8, height);
PutLE32(tiff_header + 106 + 8, height);
PutLE32(tiff_header + 118 + 8, width * bytes_per_px * height);
if (!has_alpha) PutLE32(tiff_header + 178, 0); // IFD terminator
// write header
if (fwrite(tiff_header, sizeof(tiff_header), 1, fout) != 1) {
return 0;
}
// write pixel values
for (y = 0; y < height; ++y) {
if (fwrite(rgba + y * stride, bytes_per_px, width, fout) != width) {
return 0;
}
}
return 1;
}
#undef TIFF_HEADER_SIZE
#undef EXTRA_DATA_OFFSET
#undef EXTRA_DATA_SIZE
#undef NUM_IFD_ENTRIES
static int WriteAlphaPlane(FILE* fout, const WebPDecBuffer* const buffer) {
const uint32_t width = buffer->width;
const uint32_t height = buffer->height;
const uint8_t* const a = buffer->u.YUVA.a;
const int a_stride = buffer->u.YUVA.a_stride;
uint32_t y;
assert(a != NULL);
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;
}
}
return 1;
}
// format=PGM: save a grayscale PGM file using the IMC4 layout
// (http://www.fourcc.org/yuv.php#IMC4). This is a very convenient format for
// viewing the samples, esp. for odd dimensions.
// format=RAW_YUV: just save the Y/U/V/A planes sequentially without header.
static int WritePGMOrYUV(FILE* fout, const WebPDecBuffer* const buffer,
OutputFileFormat format) {
const int width = buffer->width;
const int height = buffer->height;
const WebPYUVABuffer* const yuv = &buffer->u.YUVA;
int ok = 1;
int y;
const int pad = (format == RAW_YUV) ? 0 : 1;
const int uv_width = (width + 1) / 2;
const int uv_height = (height + 1) / 2;
const int out_stride = (width + pad) & ~pad;
const int a_height = yuv->a ? height : 0;
if (format == PGM) {
fprintf(fout, "P5\n%d %d\n255\n",
out_stride, height + uv_height + a_height);
}
for (y = 0; ok && y < height; ++y) {
ok &= (fwrite(yuv->y + y * yuv->y_stride, width, 1, fout) == 1);
if (format == PGM) {
if (width & 1) fputc(0, fout); // padding byte
}
}
if (format == PGM) { // IMC4 layout
for (y = 0; ok && y < uv_height; ++y) {
ok &= (fwrite(yuv->u + y * yuv->u_stride, uv_width, 1, fout) == 1);
ok &= (fwrite(yuv->v + y * yuv->v_stride, uv_width, 1, fout) == 1);
}
} else {
for (y = 0; ok && y < uv_height; ++y) {
ok &= (fwrite(yuv->u + y * yuv->u_stride, uv_width, 1, fout) == 1);
}
for (y = 0; ok && y < uv_height; ++y) {
ok &= (fwrite(yuv->v + y * yuv->v_stride, uv_width, 1, fout) == 1);
}
}
for (y = 0; ok && y < a_height; ++y) {
ok &= (fwrite(yuv->a + y * yuv->a_stride, width, 1, fout) == 1);
if (format == PGM) {
if (width & 1) fputc(0, fout); // padding byte
}
}
return ok;
}
static int SaveOutput(const WebPDecBuffer* const buffer,
OutputFileFormat format, const char* const out_file) {
FILE* fout = NULL;
int needs_open_file = 1;
const int use_stdout = !strcmp(out_file, "-");
WebPOutputFileFormat format, const char* const out_file) {
const int use_stdout = (out_file != NULL) && !strcmp(out_file, "-");
int ok = 1;
Stopwatch stop_watch;
if (verbose) {
StopwatchReset(&stop_watch);
}
ok = WebPSaveImage(buffer, format, out_file);
#ifdef HAVE_WINCODEC_H
needs_open_file = (format != PNG);
#endif
if (needs_open_file) {
fout = use_stdout ? ImgIoUtilSetBinaryMode(stdout) : fopen(out_file, "wb");
if (fout == NULL) {
fprintf(stderr, "Error opening output file %s\n", out_file);
return 0;
}
}
if (format == PNG ||
format == RGBA || format == BGRA || format == ARGB ||
format == rgbA || format == bgrA || format == Argb) {
#ifdef HAVE_WINCODEC_H
ok &= WritePNG(out_file, use_stdout, buffer);
#else
ok &= WritePNG(fout, buffer);
#endif
} else if (format == PAM) {
ok &= WritePPM(fout, buffer, 1);
} else if (format == PPM || format == RGB || format == BGR) {
ok &= WritePPM(fout, buffer, 0);
} else if (format == RGBA_4444 || format == RGB_565 || format == rgbA_4444) {
ok &= Write16bAsPGM(fout, buffer);
} else if (format == BMP) {
ok &= WriteBMP(fout, buffer);
} else if (format == TIFF) {
ok &= WriteTIFF(fout, buffer);
} else if (format == PGM || format == RAW_YUV ||
format == YUV || format == YUVA) {
ok &= WritePGMOrYUV(fout, buffer, format == RAW_YUV ? RAW_YUV : PGM);
} else if (format == ALPHA_PLANE_ONLY) {
ok &= WriteAlphaPlane(fout, buffer);
}
if (fout != NULL && fout != stdout) {
fclose(fout);
}
if (ok) {
if (!quiet) {
if (use_stdout) {
@@ -600,7 +112,7 @@ static const char* const kFormatType[] = {
};
static uint8_t* AllocateExternalBuffer(WebPDecoderConfig* config,
OutputFileFormat format,
WebPOutputFileFormat format,
int use_external_memory) {
uint8_t* external_buffer = NULL;
WebPDecBuffer* const output_buffer = &config->output;
@@ -671,7 +183,7 @@ int main(int argc, const char *argv[]) {
WebPDecoderConfig config;
WebPDecBuffer* const output_buffer = &config.output;
WebPBitstreamFeatures* const bitstream = &config.input;
OutputFileFormat format = PNG;
WebPOutputFileFormat format = PNG;
uint8_t* external_buffer = NULL;
int use_external_memory = 0;
const uint8_t* data = NULL;

16
imageio/Android.mk
View File

@@ -34,3 +34,19 @@ LOCAL_C_INCLUDES := $(LOCAL_PATH)/../src
LOCAL_MODULE := imagedec
include $(BUILD_STATIC_LIBRARY)
################################################################################
# libimageenc
include $(CLEAR_VARS)
LOCAL_SRC_FILES := \
image_enc.c \
LOCAL_CFLAGS := $(WEBP_CFLAGS)
LOCAL_C_INCLUDES := $(LOCAL_PATH)/../src
LOCAL_STATIC_LIBRARIES := imageio_util
LOCAL_MODULE := imageenc
include $(BUILD_STATIC_LIBRARY)

6
imageio/Makefile.am
View File

@@ -1,5 +1,5 @@
AM_CPPFLAGS += -I$(top_builddir)/src -I$(top_srcdir)/src
noinst_LTLIBRARIES = libimageio_util.la libimagedec.la
noinst_LTLIBRARIES = libimageio_util.la libimagedec.la libimageenc.la
noinst_HEADERS =
noinst_HEADERS += ../src/webp/decode.h
@@ -17,3 +17,7 @@ libimagedec_la_SOURCES += webpdec.c webpdec.h
libimagedec_la_SOURCES += wicdec.c wicdec.h
libimagedec_la_CPPFLAGS = $(JPEG_INCLUDES) $(PNG_INCLUDES) $(TIFF_INCLUDES)
libimagedec_la_CPPFLAGS += $(AM_CPPFLAGS) $(USE_EXPERIMENTAL_CODE)
libimageenc_la_SOURCES = image_enc.c image_enc.h
libimageenc_la_CPPFLAGS = $(JPEG_INCLUDES) $(PNG_INCLUDES) $(TIFF_INCLUDES)
libimageenc_la_CPPFLAGS += $(AM_CPPFLAGS) $(USE_EXPERIMENTAL_CODE)

558
imageio/image_enc.c Normal file
View File

@@ -0,0 +1,558 @@
// 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.
// -----------------------------------------------------------------------------
//
// Save image
#include "./image_enc.h"
#include <assert.h>
#include <string.h>
#ifdef WEBP_HAVE_PNG
#include <png.h>
#include <setjmp.h> // note: this must be included *after* png.h
#endif
#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>
#endif
#include "./imageio_util.h"
//------------------------------------------------------------------------------
// PNG
#ifdef HAVE_WINCODEC_H
#define IFS(fn) \
do { \
if (SUCCEEDED(hr)) { \
hr = (fn); \
if (FAILED(hr)) fprintf(stderr, #fn " failed %08lx\n", hr); \
} \
} while (0)
#ifdef __cplusplus
#define MAKE_REFGUID(x) (x)
#else
#define MAKE_REFGUID(x) &(x)
#endif
static HRESULT CreateOutputStream(const char* out_file_name,
int write_to_mem, IStream** stream) {
HRESULT hr = S_OK;
if (write_to_mem) {
// Output to a memory buffer. This is freed when 'stream' is released.
IFS(CreateStreamOnHGlobal(NULL, TRUE, stream));
} else {
IFS(SHCreateStreamOnFileA(out_file_name, STGM_WRITE | STGM_CREATE, stream));
}
if (FAILED(hr)) {
fprintf(stderr, "Error opening output file %s (%08lx)\n",
out_file_name, hr);
}
return hr;
}
static HRESULT WriteUsingWIC(const char* out_file_name, int use_stdout,
REFGUID container_guid,
uint8_t* rgb, int stride,
uint32_t width, uint32_t height, int has_alpha) {
HRESULT hr = S_OK;
IWICImagingFactory* factory = NULL;
IWICBitmapFrameEncode* frame = NULL;
IWICBitmapEncoder* encoder = NULL;
IStream* stream = NULL;
WICPixelFormatGUID pixel_format = has_alpha ? GUID_WICPixelFormat32bppBGRA
: GUID_WICPixelFormat24bppBGR;
if (out_file_name == NULL || rgb == NULL) return E_INVALIDARG;
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?). PNG support not available. "
"Use -ppm or -pgm for available PPM and PGM formats.\n");
}
IFS(CreateOutputStream(out_file_name, use_stdout, &stream));
IFS(IWICImagingFactory_CreateEncoder(factory, container_guid, NULL,
&encoder));
IFS(IWICBitmapEncoder_Initialize(encoder, stream,
WICBitmapEncoderNoCache));
IFS(IWICBitmapEncoder_CreateNewFrame(encoder, &frame, NULL));
IFS(IWICBitmapFrameEncode_Initialize(frame, NULL));
IFS(IWICBitmapFrameEncode_SetSize(frame, width, height));
IFS(IWICBitmapFrameEncode_SetPixelFormat(frame, &pixel_format));
IFS(IWICBitmapFrameEncode_WritePixels(frame, height, stride,
height * stride, rgb));
IFS(IWICBitmapFrameEncode_Commit(frame));
IFS(IWICBitmapEncoder_Commit(encoder));
if (SUCCEEDED(hr) && use_stdout) {
HGLOBAL image;
IFS(GetHGlobalFromStream(stream, &image));
if (SUCCEEDED(hr)) {
HANDLE std_output = GetStdHandle(STD_OUTPUT_HANDLE);
DWORD mode;
const BOOL update_mode = GetConsoleMode(std_output, &mode);
const void* const image_mem = GlobalLock(image);
DWORD bytes_written = 0;
// Clear output processing if necessary, then output the image.
if (update_mode) SetConsoleMode(std_output, 0);
if (!WriteFile(std_output, image_mem, (DWORD)GlobalSize(image),
&bytes_written, NULL) ||
bytes_written != GlobalSize(image)) {
hr = E_FAIL;
}
if (update_mode) SetConsoleMode(std_output, mode);
GlobalUnlock(image);
}
}
if (frame != NULL) IUnknown_Release(frame);
if (encoder != NULL) IUnknown_Release(encoder);
if (factory != NULL) IUnknown_Release(factory);
if (stream != NULL) IUnknown_Release(stream);
return hr;
}
int WebPWritePNG(const char* out_file_name, int use_stdout,
const WebPDecBuffer* const buffer) {
const uint32_t width = buffer->width;
const uint32_t height = buffer->height;
uint8_t* const rgb = buffer->u.RGBA.rgba;
const int stride = buffer->u.RGBA.stride;
const int has_alpha = WebPIsAlphaMode(buffer->colorspace);
return SUCCEEDED(WriteUsingWIC(out_file_name, use_stdout,
MAKE_REFGUID(GUID_ContainerFormatPng),
rgb, stride, width, height, has_alpha));
}
#elif defined(WEBP_HAVE_PNG) // !HAVE_WINCODEC_H
static void PNGAPI PNGErrorFunction(png_structp png, png_const_charp dummy) {
(void)dummy; // remove variable-unused warning
longjmp(png_jmpbuf(png), 1);
}
int WebPWritePNG(FILE* out_file, const WebPDecBuffer* const buffer) {
const uint32_t width = buffer->width;
const uint32_t height = buffer->height;
uint8_t* const rgb = buffer->u.RGBA.rgba;
const int stride = buffer->u.RGBA.stride;
const int has_alpha = WebPIsAlphaMode(buffer->colorspace);
volatile png_structp png;
volatile png_infop info;
png_uint_32 y;
if (out_file == NULL || buffer == NULL) return 0;
png = png_create_write_struct(PNG_LIBPNG_VER_STRING,
NULL, PNGErrorFunction, NULL);
if (png == NULL) {
return 0;
}
info = png_create_info_struct(png);
if (info == NULL) {
png_destroy_write_struct((png_structpp)&png, NULL);
return 0;
}
if (setjmp(png_jmpbuf(png))) {
png_destroy_write_struct((png_structpp)&png, (png_infopp)&info);
return 0;
}
png_init_io(png, out_file);
png_set_IHDR(png, info, width, height, 8,
has_alpha ? PNG_COLOR_TYPE_RGBA : PNG_COLOR_TYPE_RGB,
PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT,
PNG_FILTER_TYPE_DEFAULT);
png_write_info(png, info);
for (y = 0; y < height; ++y) {
png_bytep row = rgb + y * stride;
png_write_rows(png, &row, 1);
}
png_write_end(png, info);
png_destroy_write_struct((png_structpp)&png, (png_infopp)&info);
return 1;
}
#else // !HAVE_WINCODEC_H && !WEBP_HAVE_PNG
int WebPWritePNG(FILE* fout, const WebPDecBuffer* const buffer) {
if (fout == NULL || buffer == NULL) return 0;
fprintf(stderr, "PNG support not compiled. Please install the libpng "
"development package before building.\n");
fprintf(stderr, "You can run with -ppm flag to decode in PPM format.\n");
return 0;
}
#endif
//------------------------------------------------------------------------------
// PPM / PAM
static int WritePPMPAM(FILE* fout, const WebPDecBuffer* const buffer,
int alpha) {
const uint32_t width = buffer->width;
const uint32_t height = buffer->height;
const uint8_t* const rgb = buffer->u.RGBA.rgba;
const int stride = buffer->u.RGBA.stride;
const size_t bytes_per_px = alpha ? 4 : 3;
uint32_t y;
if (fout == NULL || buffer == NULL || rgb == NULL) return 0;
if (alpha) {
fprintf(fout, "P7\nWIDTH %u\nHEIGHT %u\nDEPTH 4\nMAXVAL 255\n"
"TUPLTYPE RGB_ALPHA\nENDHDR\n", width, height);
} else {
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) {
return 0;
}
}
return 1;
}
int WebPWritePPM(FILE* fout, const WebPDecBuffer* const buffer) {
return WritePPMPAM(fout, buffer, 0);
}
int WebPWritePAM(FILE* fout, const WebPDecBuffer* const buffer) {
return WritePPMPAM(fout, buffer, 1);
}
//------------------------------------------------------------------------------
// Raw PGM
// Save 16b mode (RGBA4444, RGB565, ...) for debugging purpose.
int WebPWrite16bAsPGM(FILE* fout, const WebPDecBuffer* const buffer) {
const uint32_t width = buffer->width;
const uint32_t height = buffer->height;
const uint8_t* const rgba = buffer->u.RGBA.rgba;
const int stride = buffer->u.RGBA.stride;
const uint32_t bytes_per_px = 2;
uint32_t y;
if (fout == NULL || buffer == NULL || rgba == NULL) return 0;
fprintf(fout, "P5\n%u %u\n255\n", width * bytes_per_px, height);
for (y = 0; y < height; ++y) {
if (fwrite(rgba + y * stride, width, bytes_per_px, fout) != bytes_per_px) {
return 0;
}
}
return 1;
}
//------------------------------------------------------------------------------
// BMP
static void PutLE16(uint8_t* const dst, uint32_t value) {
dst[0] = (value >> 0) & 0xff;
dst[1] = (value >> 8) & 0xff;
}
static void PutLE32(uint8_t* const dst, uint32_t value) {
PutLE16(dst + 0, (value >> 0) & 0xffff);
PutLE16(dst + 2, (value >> 16) & 0xffff);
}
#define BMP_HEADER_SIZE 54
int WebPWriteBMP(FILE* fout, const WebPDecBuffer* const buffer) {
const int has_alpha = WebPIsAlphaMode(buffer->colorspace);
const uint32_t width = buffer->width;
const uint32_t height = buffer->height;
const uint8_t* const rgba = buffer->u.RGBA.rgba;
const int stride = buffer->u.RGBA.stride;
const uint32_t bytes_per_px = has_alpha ? 4 : 3;
uint32_t y;
const uint32_t line_size = bytes_per_px * width;
const uint32_t bmp_stride = (line_size + 3) & ~3; // pad to 4
const uint32_t total_size = bmp_stride * height + BMP_HEADER_SIZE;
uint8_t bmp_header[BMP_HEADER_SIZE] = { 0 };
if (fout == NULL || buffer == NULL || rgba == NULL) return 0;
// bitmap file header
PutLE16(bmp_header + 0, 0x4d42); // signature 'BM'
PutLE32(bmp_header + 2, total_size); // size including header
PutLE32(bmp_header + 6, 0); // reserved
PutLE32(bmp_header + 10, BMP_HEADER_SIZE); // offset to pixel array
// bitmap info header
PutLE32(bmp_header + 14, 40); // DIB header size
PutLE32(bmp_header + 18, width); // dimensions
PutLE32(bmp_header + 22, -(int)height); // vertical flip!
PutLE16(bmp_header + 26, 1); // number of planes
PutLE16(bmp_header + 28, bytes_per_px * 8); // bits per pixel
PutLE32(bmp_header + 30, 0); // no compression (BI_RGB)
PutLE32(bmp_header + 34, 0); // image size (dummy)
PutLE32(bmp_header + 38, 2400); // x pixels/meter
PutLE32(bmp_header + 42, 2400); // y pixels/meter
PutLE32(bmp_header + 46, 0); // number of palette colors
PutLE32(bmp_header + 50, 0); // important color count
// TODO(skal): color profile
// write header
if (fwrite(bmp_header, sizeof(bmp_header), 1, fout) != 1) {
return 0;
}
// write pixel array
for (y = 0; y < height; ++y) {
if (fwrite(rgba + y * stride, line_size, 1, fout) != 1) {
return 0;
}
// write padding zeroes
if (bmp_stride != line_size) {
const uint8_t zeroes[3] = { 0 };
if (fwrite(zeroes, bmp_stride - line_size, 1, fout) != 1) {
return 0;
}
}
}
return 1;
}
#undef BMP_HEADER_SIZE
//------------------------------------------------------------------------------
// TIFF
#define NUM_IFD_ENTRIES 15
#define EXTRA_DATA_SIZE 16
// 10b for signature/header + n * 12b entries + 4b for IFD terminator:
#define EXTRA_DATA_OFFSET (10 + 12 * NUM_IFD_ENTRIES + 4)
#define TIFF_HEADER_SIZE (EXTRA_DATA_OFFSET + EXTRA_DATA_SIZE)
int WebPWriteTIFF(FILE* fout, const WebPDecBuffer* const buffer) {
const int has_alpha = WebPIsAlphaMode(buffer->colorspace);
const uint32_t width = buffer->width;
const uint32_t height = buffer->height;
const uint8_t* const rgba = buffer->u.RGBA.rgba;
const int stride = buffer->u.RGBA.stride;
const uint8_t bytes_per_px = has_alpha ? 4 : 3;
// For non-alpha case, we omit tag 0x152 (ExtraSamples).
const uint8_t num_ifd_entries = has_alpha ? NUM_IFD_ENTRIES
: NUM_IFD_ENTRIES - 1;
uint8_t tiff_header[TIFF_HEADER_SIZE] = {
0x49, 0x49, 0x2a, 0x00, // little endian signature
8, 0, 0, 0, // offset to the unique IFD that follows
// IFD (offset = 8). Entries must be written in increasing tag order.
num_ifd_entries, 0, // Number of entries in the IFD (12 bytes each).
0x00, 0x01, 3, 0, 1, 0, 0, 0, 0, 0, 0, 0, // 10: Width (TBD)
0x01, 0x01, 3, 0, 1, 0, 0, 0, 0, 0, 0, 0, // 22: Height (TBD)
0x02, 0x01, 3, 0, bytes_per_px, 0, 0, 0, // 34: BitsPerSample: 8888
EXTRA_DATA_OFFSET + 0, 0, 0, 0,
0x03, 0x01, 3, 0, 1, 0, 0, 0, 1, 0, 0, 0, // 46: Compression: none
0x06, 0x01, 3, 0, 1, 0, 0, 0, 2, 0, 0, 0, // 58: Photometric: RGB
0x11, 0x01, 4, 0, 1, 0, 0, 0, // 70: Strips offset:
TIFF_HEADER_SIZE, 0, 0, 0, // data follows header
0x12, 0x01, 3, 0, 1, 0, 0, 0, 1, 0, 0, 0, // 82: Orientation: topleft
0x15, 0x01, 3, 0, 1, 0, 0, 0, // 94: SamplesPerPixels
bytes_per_px, 0, 0, 0,
0x16, 0x01, 3, 0, 1, 0, 0, 0, 0, 0, 0, 0, // 106: Rows per strip (TBD)
0x17, 0x01, 4, 0, 1, 0, 0, 0, 0, 0, 0, 0, // 118: StripByteCount (TBD)
0x1a, 0x01, 5, 0, 1, 0, 0, 0, // 130: X-resolution
EXTRA_DATA_OFFSET + 8, 0, 0, 0,
0x1b, 0x01, 5, 0, 1, 0, 0, 0, // 142: Y-resolution
EXTRA_DATA_OFFSET + 8, 0, 0, 0,
0x1c, 0x01, 3, 0, 1, 0, 0, 0, 1, 0, 0, 0, // 154: PlanarConfiguration
0x28, 0x01, 3, 0, 1, 0, 0, 0, 2, 0, 0, 0, // 166: ResolutionUnit (inch)
0x52, 0x01, 3, 0, 1, 0, 0, 0, 1, 0, 0, 0, // 178: ExtraSamples: rgbA
0, 0, 0, 0, // 190: IFD terminator
// EXTRA_DATA_OFFSET:
8, 0, 8, 0, 8, 0, 8, 0, // BitsPerSample
72, 0, 0, 0, 1, 0, 0, 0 // 72 pixels/inch, for X/Y-resolution
};
uint32_t y;
if (fout == NULL || buffer == NULL || rgba == NULL) return 0;
// Fill placeholders in IFD:
PutLE32(tiff_header + 10 + 8, width);
PutLE32(tiff_header + 22 + 8, height);
PutLE32(tiff_header + 106 + 8, height);
PutLE32(tiff_header + 118 + 8, width * bytes_per_px * height);
if (!has_alpha) PutLE32(tiff_header + 178, 0); // IFD terminator
// write header
if (fwrite(tiff_header, sizeof(tiff_header), 1, fout) != 1) {
return 0;
}
// write pixel values
for (y = 0; y < height; ++y) {
if (fwrite(rgba + y * stride, bytes_per_px, width, fout) != width) {
return 0;
}
}
return 1;
}
#undef TIFF_HEADER_SIZE
#undef EXTRA_DATA_OFFSET
#undef EXTRA_DATA_SIZE
#undef NUM_IFD_ENTRIES
//------------------------------------------------------------------------------
// Raw Alpha
int WebPWriteAlphaPlane(FILE* fout, const WebPDecBuffer* const buffer) {
const uint32_t width = buffer->width;
const uint32_t height = buffer->height;
const uint8_t* const a = buffer->u.YUVA.a;
const int a_stride = buffer->u.YUVA.a_stride;
uint32_t y;
if (fout == NULL || buffer == NULL || a == NULL) return 0;
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;
}
}
return 1;
}
//------------------------------------------------------------------------------
// PGM with IMC4 layout
int WebPWritePGM(FILE* fout, const WebPDecBuffer* const buffer) {
const int width = buffer->width;
const int height = buffer->height;
const WebPYUVABuffer* const yuv = &buffer->u.YUVA;
const int uv_width = (width + 1) / 2;
const int uv_height = (height + 1) / 2;
const int a_height = (yuv->a != NULL) ? height : 0;
int ok = 1;
int y;
if (fout == NULL || buffer == NULL) return 0;
if (yuv->y == NULL || yuv->u == NULL || yuv->v == NULL) return 0;
fprintf(fout, "P5\n%d %d\n255\n",
(width + 1) & ~1, height + uv_height + a_height);
for (y = 0; ok && y < height; ++y) {
ok &= (fwrite(yuv->y + y * yuv->y_stride, width, 1, fout) == 1);
if (width & 1) fputc(0, fout); // padding byte
}
for (y = 0; ok && y < uv_height; ++y) {
ok &= (fwrite(yuv->u + y * yuv->u_stride, uv_width, 1, fout) == 1);
ok &= (fwrite(yuv->v + y * yuv->v_stride, uv_width, 1, fout) == 1);
}
for (y = 0; ok && y < a_height; ++y) {
ok &= (fwrite(yuv->a + y * yuv->a_stride, width, 1, fout) == 1);
if (width & 1) fputc(0, fout); // padding byte
}
return ok;
}
//------------------------------------------------------------------------------
// Raw YUV(A) planes
int WebPWriteYUV(FILE* fout, const WebPDecBuffer* const buffer) {
const int width = buffer->width;
const int height = buffer->height;
const WebPYUVABuffer* const yuv = &buffer->u.YUVA;
const int uv_width = (width + 1) / 2;
const int uv_height = (height + 1) / 2;
const int a_height = (yuv->a != NULL) ? height : 0;
int ok = 1;
int y;
if (fout == NULL || buffer == NULL) return 0;
if (yuv->y == NULL || yuv->u == NULL || yuv->v == NULL) return 0;
for (y = 0; ok && y < height; ++y) {
ok &= (fwrite(yuv->y + y * yuv->y_stride, width, 1, fout) == 1);
}
for (y = 0; ok && y < uv_height; ++y) {
ok &= (fwrite(yuv->u + y * yuv->u_stride, uv_width, 1, fout) == 1);
}
for (y = 0; ok && y < uv_height; ++y) {
ok &= (fwrite(yuv->v + y * yuv->v_stride, uv_width, 1, fout) == 1);
}
for (y = 0; ok && y < a_height; ++y) {
ok &= (fwrite(yuv->a + y * yuv->a_stride, width, 1, fout) == 1);
}
return ok;
}
//------------------------------------------------------------------------------
// Generic top-level call
int WebPSaveImage(const WebPDecBuffer* const buffer,
WebPOutputFileFormat format, const char* const out_file) {
FILE* fout = NULL;
int needs_open_file = 1;
const int use_stdout = (out_file != NULL) && !strcmp(out_file, "-");
int ok = 1;
if (buffer == NULL || out_file == NULL) return 0;
#ifdef HAVE_WINCODEC_H
needs_open_file = (format != PNG);
#endif
if (needs_open_file) {
fout = use_stdout ? ImgIoUtilSetBinaryMode(stdout) : fopen(out_file, "wb");
if (fout == NULL) {
fprintf(stderr, "Error opening output file %s\n", out_file);
return 0;
}
}
if (format == PNG ||
format == RGBA || format == BGRA || format == ARGB ||
format == rgbA || format == bgrA || format == Argb) {
#ifdef HAVE_WINCODEC_H
ok &= WebPWritePNG(out_file, use_stdout, buffer);
#else
ok &= WebPWritePNG(fout, buffer);
#endif
} else if (format == PAM) {
ok &= WebPWritePAM(fout, buffer);
} else if (format == PPM || format == RGB || format == BGR) {
ok &= WebPWritePPM(fout, buffer);
} else if (format == RGBA_4444 || format == RGB_565 || format == rgbA_4444) {
ok &= WebPWrite16bAsPGM(fout, buffer);
} else if (format == BMP) {
ok &= WebPWriteBMP(fout, buffer);
} else if (format == TIFF) {
ok &= WebPWriteTIFF(fout, buffer);
} else if (format == RAW_YUV) {
ok &= WebPWriteYUV(fout, buffer);
} else if (format == PGM || format == YUV || format == YUVA) {
ok &= WebPWritePGM(fout, buffer);
} else if (format == ALPHA_PLANE_ONLY) {
ok &= WebPWriteAlphaPlane(fout, buffer);
}
if (fout != NULL && fout != stdout) {
fclose(fout);
}
return ok;
}

96
imageio/image_enc.h Normal file
View File

@@ -0,0 +1,96 @@
// 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 save PNG/JPEG/WebP/TIFF/WIC images.
//
// Author: Skal (pascal.massimino@gmail.com)
#ifndef WEBP_IMAGEIO_IMAGE_ENC_H_
#define WEBP_IMAGEIO_IMAGE_ENC_H_
#include <stdio.h>
#ifdef HAVE_CONFIG_H
#include "webp/config.h"
#endif
#include "webp/types.h"
#include "webp/decode.h"
#ifdef __cplusplus
extern "C" {
#endif
// Output types
typedef enum {
PNG = 0,
PAM,
PPM,
PGM,
BMP,
TIFF,
RAW_YUV,
ALPHA_PLANE_ONLY, // this is for experimenting only
// forced colorspace output (for testing, mostly)
RGB, RGBA, BGR, BGRA, ARGB,
RGBA_4444, RGB_565,
rgbA, bgrA, Argb, rgbA_4444,
YUV, YUVA
} WebPOutputFileFormat;
// General all-purpose call.
// Most formats expect a 'buffer' containing RGBA-like samples, except
// RAW_YUV, YUV and YUVA formats.
// If 'out_file_name' is "-", data is saved to stdout.
// Returns false if an error occurred, true otherwise.
int WebPSaveImage(const WebPDecBuffer* const buffer,
WebPOutputFileFormat format, const char* const out_file_name);
// Save to PNG.
#ifdef HAVE_WINCODEC_H
int WebPWritePNG(const char* out_file_name, int use_stdout,
const struct WebPDecBuffer* const buffer);
#else
int WebPWritePNG(FILE* out_file, const WebPDecBuffer* const buffer);
#endif
// Save to PPM format (RGB, no alpha)
int WebPWritePPM(FILE* fout, const struct WebPDecBuffer* const buffer);
// Save to PAM format (= PPM + alpha)
int WebPWritePAM(FILE* fout, const struct WebPDecBuffer* const buffer);
// Save 16b mode (RGBA4444, RGB565, ...) for debugging purposes.
int WebPWrite16bAsPGM(FILE* fout, const struct WebPDecBuffer* const buffer);
// Save as BMP
int WebPWriteBMP(FILE* fout, const struct WebPDecBuffer* const buffer);
// Save as TIFF
int WebPWriteTIFF(FILE* fout, const struct WebPDecBuffer* const buffer);
// Save the ALPHA plane (only) as a PGM
int WebPWriteAlphaPlane(FILE* fout, const struct WebPDecBuffer* const buffer);
// Save as YUV samples as PGM format (using IMC4 layout).
// See: http://www.fourcc.org/yuv.php#IMC4.
// (very convenient format for viewing the samples, esp. for odd dimensions).
int WebPWritePGM(FILE* fout, const struct WebPDecBuffer* const buffer);
// Save YUV(A) planes sequentially (raw dump)
int WebPWriteYUV(FILE* fout, const struct WebPDecBuffer* const buffer);
// Save 16b mode (RGBA4444, RGB565, ...) as PGM format, for debugging purposes.
int WebPWrite16bAsPGM(FILE* fout, const struct WebPDecBuffer* const buffer);
#ifdef __cplusplus
} // extern "C"
#endif
#endif // WEBP_IMAGEIO_IMAGE_ENC_H_

12
makefile.unix
View File

@@ -223,6 +223,9 @@ EX_FORMAT_DEC_OBJS = \
imageio/tiffdec.o \
imageio/webpdec.o \
EX_FORMAT_ENC_OBJS = \
imageio/image_enc.o \
EX_UTIL_OBJS = \
examples/example_util.o \
@@ -311,8 +314,11 @@ HDRS = \
src/webp/format_constants.h \
$(HDRS_INSTALLED) \
OUT_LIBS = examples/libexample_util.a imageio/libimageio_util.a
OUT_LIBS += imageio/libimagedec.a src/libwebpdecoder.a
OUT_LIBS = examples/libexample_util.a
OUT_LIBS += imageio/libimageio_util.a
OUT_LIBS += imageio/libimagedec.a
OUT_LIBS += imageio/libimageenc.a
OUT_LIBS += src/libwebpdecoder.a
OUT_LIBS += src/libwebp.a
EXTRA_LIB = extras/libwebpextras.a
OUT_EXAMPLES = examples/cwebp examples/dwebp
@@ -349,6 +355,7 @@ examples/libexample_util.a: $(EX_UTIL_OBJS)
examples/libgifdec.a: $(GIFDEC_OBJS)
extras/libwebpextras.a: $(LIBWEBPEXTRA_OBJS)
imageio/libimagedec.a: $(EX_FORMAT_DEC_OBJS)
imageio/libimageenc.a: $(EX_FORMAT_ENC_OBJS)
imageio/libimageio_util.a: $(IMAGE_UTIL_OBJS)
src/libwebpdecoder.a: $(LIBWEBPDECODER_OBJS)
src/libwebp.a: $(LIBWEBP_OBJS)
@@ -377,6 +384,7 @@ examples/cwebp: src/libwebp.a
examples/cwebp: EXTRA_LIBS += $(CWEBP_LIBS)
examples/dwebp: examples/libexample_util.a
examples/dwebp: imageio/libimagedec.a
examples/dwebp: imageio/libimageenc.a
examples/dwebp: imageio/libimageio_util.a
examples/dwebp: src/libwebp.a
examples/dwebp: EXTRA_LIBS += $(DWEBP_LIBS)