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cwebp: add basic TIFF support

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Change-Id: I29f354e1ef9cf8f23002cf2e15814a53a94b4ed5
This commit is contained in:
James Zern 2012-07-01 17:55:21 -07:00
parent 4c3975792b
commit 6f76d246ba
2 changed files with 76 additions and 2 deletions
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72
examples/cwebp.c
View File

@ -27,6 +27,10 @@
#include <jpeglib.h>
#endif
#ifdef WEBP_HAVE_TIFF
#include <tiffio.h>
#endif
#ifdef HAVE_WINCODEC_H
#ifdef __MINGW32__
#define INITGUID // Without this GUIDs are declared extern and fail to link
@ -449,9 +453,73 @@ static int ReadPNG(FILE* in_file, WebPPicture* const pic, int keep_alpha) {
}
#endif
#ifdef WEBP_HAVE_TIFF
static int ReadTIFF(const char* const filename,
WebPPicture* const pic, int keep_alpha) {
TIFF* const tif = TIFFOpen(filename, "r");
uint32 width, height;
uint32* raster;
int ok = 0;
int dircount = 1;
if (tif == NULL) {
fprintf(stderr, "Error! Cannot open TIFF file '%s'\n", filename);
return 0;
}
while (TIFFReadDirectory(tif)) ++dircount;
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);
}
TIFFGetField(tif, TIFFTAG_IMAGEWIDTH, &width);
TIFFGetField(tif, TIFFTAG_IMAGELENGTH, &height);
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 __BIG_ENDIAN__
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 && keep_alpha == 2) {
WebPCleanupTransparentArea(pic);
}
TIFFClose(tif);
return ok;
}
#else
static int ReadTIFF(const char* const filename,
WebPPicture* const pic, int keep_alpha) {
(void)filename;
(void)pic;
(void)keep_alpha;
fprintf(stderr, "TIFF support not compiled. Please install the libtiff "
"development package before building.\n");
return 0;
}
#endif
typedef enum {
PNG = 0,
JPEG,
TIFF_, // 'TIFF' clashes with libtiff
UNSUPPORTED
} InputFileFormat;
@ -470,6 +538,8 @@ static InputFileFormat GetImageType(FILE* in_file) {
format = PNG;
} else if (magic >= 0xFFD8FF00U && magic <= 0xFFD8FFFFU) {
format = JPEG;
} else if (magic == 0x49492A00 || magic == 0x4D4D002A) {
format = TIFF_;
}
return format;
}
@ -490,6 +560,8 @@ static int ReadPicture(const char* const filename, WebPPicture* const pic,
ok = ReadPNG(in_file, pic, keep_alpha);
} else if (format == JPEG) {
ok = ReadJPEG(in_file, pic);
} else if (format == TIFF_) {
ok = ReadTIFF(filename, pic, keep_alpha);
}
} else {
// If image size is specified, infer it as YUV format.

6
makefile.unix
View File

@ -12,8 +12,8 @@
# These flag assume you have libpng and libjpeg installed. If not, either
# follow below install instructions or just comment out the next lines.
EXTRA_FLAGS= -DWEBP_HAVE_PNG -DWEBP_HAVE_JPEG
EXTRA_LIBS= -lpng -ljpeg -lz
EXTRA_FLAGS= -DWEBP_HAVE_PNG -DWEBP_HAVE_JPEG -DWEBP_HAVE_TIFF
EXTRA_LIBS= -lpng -ltiff -ljpeg -lz
ifeq ($(strip $(shell uname)), Darwin)
# Work around a problem linking tables marked as common symbols,
# cf., src/enc/yuv.[hc]
@ -30,10 +30,12 @@ endif
# 1. Install MacPorts (http://www.macports.org/install.php)
# 2. Run "sudo port install jpeg"
# 3. Run "sudo port install libpng"
# 4. Run "sudo port install tiff"
# To install libraries on Linux:
# 1. Run "sudo apt-get install libjpeg62-dev"
# 2. Run "sudo apt-get install libpng12-dev"
# 3. Run "sudo apt-get install libtiff4-dev"
# Uncomment for build for 32bit platform
# Alternatively, you can just use the command