static int ReadPicture(const char* const filename, WebPPicture* const pic,
int keep_alpha, Metadata* const metadata) {
int ok = 0;
FILE* in_file = fopen(filename, "rb");
if (in_file == NULL) {
fprintf(stderr, "Error! Cannot open input file '%s'\n", filename);
return ok;
}
if (pic->width == 0 || pic->height == 0) {
// If no size specified, try to decode it as PNG/JPEG (as appropriate).
const InputFileFormat format = GetImageType(in_file);
if (format == PNG_) {
ok = ReadPNG(in_file, pic, keep_alpha, metadata);
} else if (format == JPEG_) {
ok = ReadJPEG(in_file, pic, metadata);
} else if (format == TIFF_) {
ok = ReadTIFF(filename, pic, keep_alpha, metadata);
} else if (format == WEBP_) {
ok = ReadWebP(filename, pic, keep_alpha, metadata);
}
} else {
// If image size is specified, infer it as YUV format.
ok = ReadYUV(in_file, pic);
}
if (!ok) {
fprintf(stderr, "Error! Could not process file %s\n", filename);
}
fclose(in_file);
return ok;
}
static int ReadPicture(const char* const filename, WebPPicture* const pic,
int keep_alpha, Metadata* const metadata) {
int ok;
if (pic->width != 0 && pic->height != 0) {
// If image size is specified, infer it as YUV format.
FILE* in_file = fopen(filename, "rb");
if (in_file == NULL) {
fprintf(stderr, "Error! Cannot open input file '%s'\n", filename);
return 0;
}
ok = ReadYUV(in_file, pic);
fclose(in_file);
} else {
// If no size specified, try to decode it using WIC.
ok = ReadPictureWithWIC(filename, pic, keep_alpha, metadata);
}
if (!ok) {
fprintf(stderr, "Error! Could not process file %s\n", filename);
}
return ok;
}