third-party/leptonica/prog/convertformat.c
/*====================================================================*
- Copyright (C) 2001 Leptonica. All rights reserved.
-
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions
- are met:
- 1. Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
- 2. Redistributions in binary form must reproduce the above
- copyright notice, this list of conditions and the following
- disclaimer in the documentation and/or other materials
- provided with the distribution.
-
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ANY
- CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*====================================================================*/
/*
* convertformat.c
*
* Converts an image file from one format to another.
*
* Syntax: convertformat filein fileout [format]
*
* where format is one of these:
*
* BMP
* JPEG (only applicable for 8 bpp or rgb; transcode instead to png)
* PNG
* TIFF
* TIFF_G4 (only applicable for 1 bpp; transcode instead to png)
* PNM
* GIF
* WEBP
*
* The output format can be chosen either explicitly with the @format
* arg, or implicitly using the extension of @fileout:
*
* BMP .bmp
* JPEG .jpg
* PNG .png
* TIFF .tif
* TIFF_G4 .tif
* PNM .pnm
* GIF .gif
* WEBP .webp
*/
#include <string.h>
#include "allheaders.h"
int main(int argc,
char **argv)
{
PIX *pixs;
char *filein, *fileout, *base, *ext;
const char *formatstr;
l_int32 format;
l_int32 d;
static char mainName[] = "convertformat";
if (argc != 3 && argc != 4) {
fprintf(stderr, "Syntax: convertformat filein fileout [format]\n"
"If you don't specify a format, the output file\n"
"needs one of these seven extensions:\n"
" bmp, jpg, png, tif, pnm, gif, webp\n");
return 1;
}
filein = argv[1];
fileout = argv[2];
if (argc == 3) {
splitPathAtExtension(fileout, NULL, &ext);
if (!strcmp(ext, ".bmp"))
format = IFF_BMP;
else if (!strcmp(ext, ".jpg"))
format = IFF_JFIF_JPEG;
else if (!strcmp(ext, ".png"))
format = IFF_PNG;
else if (!strcmp(ext, ".tif")) /* requesting g4-tiff binary comp */
format = IFF_TIFF_G4;
else if (!strcmp(ext, ".pnm"))
format = IFF_PNM;
else if (!strcmp(ext, ".gif"))
format = IFF_GIF;
else if (!strcmp(ext, ".webp"))
format = IFF_WEBP;
else {
return ERROR_INT(
"Valid extensions: bmp, jpg, png, tif, pnm, gif, webp",
mainName, 1);
}
lept_free(ext);
}
else {
formatstr = argv[3];
if (!strcmp(formatstr, "BMP"))
format = IFF_BMP;
else if (!strcmp(formatstr, "JPEG"))
format = IFF_JFIF_JPEG;
else if (!strcmp(formatstr, "PNG"))
format = IFF_PNG;
else if (!strcmp(formatstr, "TIFF"))
format = IFF_TIFF_G4;
else if (!strcmp(formatstr, "PNM"))
format = IFF_PNM;
else if (!strcmp(formatstr, "GIF"))
format = IFF_GIF;
else if (!strcmp(formatstr, "WEBP"))
format = IFF_WEBP;
else {
return ERROR_INT(
"Valid formats: BMP, JPEG, PNG, TIFF, PNM, GIF, WEBP",
mainName, 1);
}
}
if ((pixs = pixRead(filein)) == NULL) {
L_ERROR("read fail for %s\n", mainName, filein);
return 1;
}
d = pixGetDepth(pixs);
if (d != 1 && format == IFF_TIFF_G4) {
L_WARNING("can't convert to tiff_g4; converting to png\n", mainName);
format = IFF_PNG;
}
if (d < 8 && format == IFF_JFIF_JPEG) {
L_WARNING("can't convert to jpeg; converting to png\n", mainName);
splitPathAtExtension(fileout, &base, &ext);
fileout = stringJoin(base, ".png");
format = IFF_PNG;
}
if (d < 8 && format == IFF_WEBP) {
L_WARNING("can't convert to webp; converting to png\n", mainName);
splitPathAtExtension(fileout, &base, &ext);
fileout = stringJoin(base, ".png");
format = IFF_PNG;
}
pixWrite(fileout, pixs, format);
return 0;
}