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gif2webp: add support for reading from stdin

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output to stdout is already supported; this matches [cd]webp

BUG=webp:371

Change-Id: Ib1ce1661b16ea792943bca2980f779584e90cc86
This commit is contained in:
James Zern
2018-01-25 23:22:54 -08:00
committed by Pascal Massimino
parent cf1c5054c7
commit cbde5728c8
2 changed files with 28 additions and 5 deletions
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23
examples/gif2webp.c
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@ -23,6 +23,10 @@
#ifdef WEBP_HAVE_GIF
#if defined(HAVE_UNISTD_H) && HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <gif_lib.h>
#include "webp/encode.h"
#include "webp/mux.h"
@ -30,6 +34,10 @@
#include "../imageio/imageio_util.h"
#include "./gifdec.h"
#if !defined(STDIN_FILENO)
#define STDIN_FILENO 0
#endif
//------------------------------------------------------------------------------
static int transparent_index = GIF_INDEX_INVALID; // Opaque by default.
@ -263,9 +271,11 @@ int main(int argc, const char *argv[]) {
// Start the decoder object
#if LOCAL_GIF_PREREQ(5,0)
gif = DGifOpenFileName(in_file, &gif_error);
gif = !strcmp(in_file, "-") ? DGifOpenFileHandle(STDIN_FILENO, &gif_error)
: DGifOpenFileName(in_file, &gif_error);
#else
gif = DGifOpenFileName(in_file);
gif = !strcmp(in_file, "-") ? DGifOpenFileHandle(STDIN_FILENO)
: DGifOpenFileName(in_file);
#endif
if (gif == NULL) goto End;
@ -532,8 +542,13 @@ int main(int argc, const char *argv[]) {
goto End;
}
if (!quiet) {
fprintf(stderr, "Saved output file (%d bytes): %s\n",
(int)webp_data.size, out_file);
if (!strcmp(out_file, "-")) {
fprintf(stderr, "Saved %d bytes to STDIO\n",
(int)webp_data.size);
} else {
fprintf(stderr, "Saved output file (%d bytes): %s\n",
(int)webp_data.size, out_file);
}
}
} else {
if (!quiet) {