view release on metacpan or  search on metacpan

webp-src/examples/vwebp.c  view on Meta::CPAN

               (GLvoid*)pic->u.RGBA.rgba);
  if (kParams.print_info) {
    char tmp[32];

    glColor4f(0.90f, 0.0f, 0.90f, 1.0f);
    glRasterPos2f(-0.95f, 0.90f);
    PrintString(kParams.file_name);

    snprintf(tmp, sizeof(tmp), "Dimension:%d x %d", pic->width, pic->height);
    glColor4f(0.90f, 0.0f, 0.90f, 1.0f);
    glRasterPos2f(-0.95f, 0.80f);
    PrintString(tmp);
    if (iter->x_offset != 0 || iter->y_offset != 0) {
      snprintf(tmp, sizeof(tmp), " (offset:%d,%d)",
               iter->x_offset, iter->y_offset);
      glRasterPos2f(-0.95f, 0.70f);
      PrintString(tmp);
    }
  }
  glPopMatrix();
  glFlush();
}

static void StartDisplay(void) {
  const int width = kParams.canvas_width;
  const int height = kParams.canvas_height;
  glutInitDisplayMode(GLUT_RGBA);
  glutInitWindowSize(width, height);
  glutCreateWindow("WebP viewer");
  glutDisplayFunc(HandleDisplay);
  glutIdleFunc(NULL);
  glutKeyboardFunc(HandleKey);
  glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
  glEnable(GL_BLEND);
  glClearColor(GetColorf(kParams.bg_color, 0),
               GetColorf(kParams.bg_color, 8),
               GetColorf(kParams.bg_color, 16),
               GetColorf(kParams.bg_color, 24));
  HandleReshape(width, height);
  glClear(GL_COLOR_BUFFER_BIT);
  DrawCheckerBoard();
}

//------------------------------------------------------------------------------
// Main

static void Help(void) {
  printf("Usage: vwebp in_file [options]\n\n"
         "Decodes the WebP image file and visualize it using OpenGL\n"
         "Options are:\n"
         "  -version  .... print version number and exit.\n"
         "  -noicc ....... don't use the icc profile if present.\n"
         "  -nofancy ..... don't use the fancy YUV420 upscaler.\n"
         "  -nofilter .... disable in-loop filtering.\n"
         "  -mt .......... use multi-threading.\n"
         "  -info ........ print info.\n"
         "  -h     ....... this help message.\n"
         "\n"
         "Keyboard shortcuts:\n"
         "  'c' ................ toggle use of color profile.\n"
         "  'i' ................ overlay file information.\n"
         "  'q' / 'Q' / ESC .... quit.\n"
        );
}

int main(int argc, char *argv[]) {
  WebPDecoderConfig config;
  int c;

  if (!WebPInitDecoderConfig(&config)) {
    fprintf(stderr, "Library version mismatch!\n");
    return -1;
  }
  kParams.config = &config;
  kParams.use_color_profile = 1;

  for (c = 1; c < argc; ++c) {
    if (!strcmp(argv[c], "-h") || !strcmp(argv[c], "-help")) {
      Help();
      return 0;
    } else if (!strcmp(argv[c], "-noicc")) {
      kParams.use_color_profile = 0;
    } else if (!strcmp(argv[c], "-nofancy")) {
      config.options.no_fancy_upsampling = 1;
    } else if (!strcmp(argv[c], "-nofilter")) {
      config.options.bypass_filtering = 1;
    } else if (!strcmp(argv[c], "-info")) {
      kParams.print_info = 1;
    } else if (!strcmp(argv[c], "-version")) {
      const int dec_version = WebPGetDecoderVersion();
      const int dmux_version = WebPGetDemuxVersion();
      printf("WebP Decoder version: %d.%d.%d\nWebP Demux version: %d.%d.%d\n",
             (dec_version >> 16) & 0xff, (dec_version >> 8) & 0xff,
             dec_version & 0xff, (dmux_version >> 16) & 0xff,
             (dmux_version >> 8) & 0xff, dmux_version & 0xff);
      return 0;
    } else if (!strcmp(argv[c], "-mt")) {
      config.options.use_threads = 1;
    } else if (argv[c][0] == '-') {
      printf("Unknown option '%s'\n", argv[c]);
      Help();
      return -1;
    } else {
      kParams.file_name = argv[c];
    }
  }

  if (kParams.file_name == NULL) {
    printf("missing input file!!\n");
    Help();
    return 0;
  }

  if (!ExUtilReadFile(kParams.file_name,
                      &kParams.data.bytes, &kParams.data.size)) {
    goto Error;
  }

  kParams.dmux = WebPDemux(&kParams.data);
  if (kParams.dmux == NULL) {
    fprintf(stderr, "Could not create demuxing object!\n");