1 // Copyright 2017 Google Inc. All Rights Reserved.
2 //
3 // Use of this source code is governed by a BSD-style license
4 // that can be found in the COPYING file in the root of the source
5 // tree. An additional intellectual property rights grant can be found
6 // in the file PATENTS. All contributing project authors may
7 // be found in the AUTHORS file in the root of the source tree.
8 // -----------------------------------------------------------------------------
9 //
10 // Simple SDL-based WebP file viewer.
11 // Does not support animation, just static images.
12 //
13 // Press 'q' to exit.
14 //
15 // Author: James Zern (jzern@google.com)
16
17 #include <stdio.h>
18 #include <stdlib.h>
19
20 #ifdef HAVE_CONFIG_H
21 #include "webp/config.h"
22 #endif
23
24 #if defined(WEBP_HAVE_SDL)
25
26 #include "webp_to_sdl.h"
27 #include "webp/decode.h"
28 #include "imageio/imageio_util.h"
29 #include "../examples/unicode.h"
30
31 #if defined(WEBP_HAVE_JUST_SDL_H)
32 #include <SDL.h>
33 #else
34 #include <SDL2/SDL.h>
35 #endif
36
ProcessEvents(void)37 static void ProcessEvents(void) {
38 int done = 0;
39 SDL_Event event;
40 while (!done && SDL_WaitEvent(&event)) {
41 switch (event.type) {
42 case SDL_KEYUP:
43 switch (event.key.keysym.sym) {
44 case SDLK_q: done = 1; break;
45 default: break;
46 }
47 break;
48 default: break;
49 }
50 }
51 }
52
53 // Returns EXIT_SUCCESS on success, EXIT_FAILURE on failure.
main(int argc,char * argv[])54 int main(int argc, char* argv[]) {
55 int c;
56 int ok = 0;
57
58 INIT_WARGV(argc, argv);
59
60 if (argc == 1) {
61 fprintf(stderr, "Usage: %s [-h] image.webp [more_files.webp...]\n",
62 argv[0]);
63 goto Error;
64 }
65
66 for (c = 1; c < argc; ++c) {
67 const char* file = NULL;
68 const uint8_t* webp = NULL;
69 size_t webp_size = 0;
70 if (!strcmp(argv[c], "-h")) {
71 printf("Usage: %s [-h] image.webp [more_files.webp...]\n", argv[0]);
72 FREE_WARGV_AND_RETURN(EXIT_SUCCESS);
73 } else {
74 file = (const char*)GET_WARGV(argv, c);
75 }
76 if (file == NULL) continue;
77 if (!ImgIoUtilReadFile(file, &webp, &webp_size)) {
78 WFPRINTF(stderr, "Error opening file: %s\n", (const W_CHAR*)file);
79 goto Error;
80 }
81 if (webp_size != (size_t)(int)webp_size) {
82 free((void*)webp);
83 fprintf(stderr, "File too large.\n");
84 goto Error;
85 }
86 ok = WebPToSDL((const char*)webp, (int)webp_size);
87 free((void*)webp);
88 if (!ok) {
89 WFPRINTF(stderr, "Error decoding file %s\n", (const W_CHAR*)file);
90 goto Error;
91 }
92 ProcessEvents();
93 }
94 ok = 1;
95
96 Error:
97 SDL_Quit();
98 FREE_WARGV_AND_RETURN(ok ? EXIT_SUCCESS : EXIT_FAILURE);
99 }
100
101 #else // !WEBP_HAVE_SDL
102
main(int argc,const char * argv[])103 int main(int argc, const char* argv[]) {
104 fprintf(stderr, "SDL support not enabled in %s.\n", argv[0]);
105 (void)argc;
106 return 0;
107 }
108
109 #endif
110