static WebPMuxError DisplayInfo(const WebPMux* mux) { int width, height; uint32_t flag; WebPMuxError err = WebPMuxGetCanvasSize(mux, &width, &height); assert(err == WEBP_MUX_OK); // As WebPMuxCreate() was successful earlier. printf("Canvas size: %d x %d\n", width, height); err = WebPMuxGetFeatures(mux, &flag); if (flag & FRAGMENTS_FLAG) err = WEBP_MUX_INVALID_ARGUMENT; RETURN_IF_ERROR("Failed to retrieve features\n"); if (flag == 0) { fprintf(stderr, "No features present.\n"); return err; } // Print the features present. printf("Features present:"); if (flag & ANIMATION_FLAG) printf(" animation"); if (flag & FRAGMENTS_FLAG) printf(" image fragments"); if (flag & ICCP_FLAG) printf(" ICC profile"); if (flag & EXIF_FLAG) printf(" EXIF metadata"); if (flag & XMP_FLAG) printf(" XMP metadata"); if (flag & ALPHA_FLAG) printf(" transparency"); printf("\n"); if ((flag & ANIMATION_FLAG) || (flag & FRAGMENTS_FLAG)) { const int is_anim = !!(flag & ANIMATION_FLAG); const WebPChunkId id = is_anim ? WEBP_CHUNK_ANMF : WEBP_CHUNK_FRGM; const char* const type_str = is_anim ? "frame" : "fragment"; int nFrames; if (is_anim) { WebPMuxAnimParams params; err = WebPMuxGetAnimationParams(mux, ¶ms); assert(err == WEBP_MUX_OK); printf("Background color : 0x%.8X Loop Count : %d\n", params.bgcolor, params.loop_count); } err = WebPMuxNumChunks(mux, id, &nFrames); assert(err == WEBP_MUX_OK); printf("Number of %ss: %d\n", type_str, nFrames); if (nFrames > 0) { int i; printf("No.: width height alpha x_offset y_offset "); if (is_anim) printf("duration dispose blend "); printf("image_size\n"); for (i = 1; i <= nFrames; i++) { WebPMuxFrameInfo frame; err = WebPMuxGetFrame(mux, i, &frame); if (err == WEBP_MUX_OK) { WebPBitstreamFeatures features; const VP8StatusCode status = WebPGetFeatures( frame.bitstream.bytes, frame.bitstream.size, &features); assert(status == VP8_STATUS_OK); // Checked by WebPMuxCreate(). (void)status; printf("%3d: %5d %5d %5s %8d %8d ", i, features.width, features.height, features.has_alpha ? "yes" : "no", frame.x_offset, frame.y_offset); if (is_anim) { const char* const dispose = (frame.dispose_method == WEBP_MUX_DISPOSE_NONE) ? "none" : "background"; const char* const blend = (frame.blend_method == WEBP_MUX_BLEND) ? "yes" : "no"; printf("%8d %10s %5s ", frame.duration, dispose, blend); } printf("%10d\n", (int)frame.bitstream.size); } WebPDataClear(&frame.bitstream); RETURN_IF_ERROR3("Failed to retrieve %s#%d\n", type_str, i); } } } if (flag & ICCP_FLAG) { WebPData icc_profile; err = WebPMuxGetChunk(mux, "ICCP", &icc_profile); assert(err == WEBP_MUX_OK); printf("Size of the ICC profile data: %d\n", (int)icc_profile.size); } if (flag & EXIF_FLAG) { WebPData exif; err = WebPMuxGetChunk(mux, "EXIF", &exif); assert(err == WEBP_MUX_OK); printf("Size of the EXIF metadata: %d\n", (int)exif.size); } if (flag & XMP_FLAG) { WebPData xmp; err = WebPMuxGetChunk(mux, "XMP ", &xmp); assert(err == WEBP_MUX_OK); printf("Size of the XMP metadata: %d\n", (int)xmp.size); } if ((flag & ALPHA_FLAG) && !(flag & (ANIMATION_FLAG | FRAGMENTS_FLAG))) { WebPMuxFrameInfo image; err = WebPMuxGetFrame(mux, 1, &image); if (err == WEBP_MUX_OK) { printf("Size of the image (with alpha): %d\n", (int)image.bitstream.size); } WebPDataClear(&image.bitstream); RETURN_IF_ERROR("Failed to retrieve the image\n"); } return WEBP_MUX_OK; }
static WebPMuxError DisplayInfo(const WebPMux* mux) { uint32_t flag; WebPMuxError err = WebPMuxGetFeatures(mux, &flag); #ifndef WEBP_EXPERIMENTAL_FEATURES if (flag & FRAGMENTS_FLAG) err = WEBP_MUX_INVALID_ARGUMENT; #endif RETURN_IF_ERROR("Failed to retrieve features\n"); if (flag == 0) { fprintf(stderr, "No features present.\n"); return err; } // Print the features present. printf("Features present:"); if (flag & ANIMATION_FLAG) printf(" animation"); if (flag & FRAGMENTS_FLAG) printf(" image fragments"); if (flag & ICCP_FLAG) printf(" ICC profile"); if (flag & EXIF_FLAG) printf(" EXIF metadata"); if (flag & XMP_FLAG) printf(" XMP metadata"); if (flag & ALPHA_FLAG) printf(" transparency"); printf("\n"); if ((flag & ANIMATION_FLAG) || (flag & FRAGMENTS_FLAG)) { const int is_anim = !!(flag & ANIMATION_FLAG); const WebPChunkId id = is_anim ? WEBP_CHUNK_ANMF : WEBP_CHUNK_FRGM; const char* const type_str = is_anim ? "frame" : "fragment"; int nFrames; if (is_anim) { WebPMuxAnimParams params; err = WebPMuxGetAnimationParams(mux, ¶ms); RETURN_IF_ERROR("Failed to retrieve animation parameters\n"); printf("Background color : 0x%.8X Loop Count : %d\n", params.bgcolor, params.loop_count); } err = WebPMuxNumChunks(mux, id, &nFrames); RETURN_IF_ERROR2("Failed to retrieve number of %ss\n", type_str); printf("Number of %ss: %d\n", type_str, nFrames); if (nFrames > 0) { int i; printf("No.: x_offset y_offset "); if (is_anim) printf("duration dispose "); printf("image_size\n"); for (i = 1; i <= nFrames; i++) { WebPMuxFrameInfo frame; err = WebPMuxGetFrame(mux, i, &frame); if (err == WEBP_MUX_OK) { printf("%3d: %8d %8d ", i, frame.x_offset, frame.y_offset); if (is_anim) printf("%8d %7d ", frame.duration, frame.dispose_method); printf("%10d\n", (int)frame.bitstream.size); } WebPDataClear(&frame.bitstream); RETURN_IF_ERROR3("Failed to retrieve %s#%d\n", type_str, i); } } } if (flag & ICCP_FLAG) { WebPData icc_profile; err = WebPMuxGetChunk(mux, "ICCP", &icc_profile); RETURN_IF_ERROR("Failed to retrieve the ICC profile\n"); printf("Size of the ICC profile data: %d\n", (int)icc_profile.size); } if (flag & EXIF_FLAG) { WebPData exif; err = WebPMuxGetChunk(mux, "EXIF", &exif); RETURN_IF_ERROR("Failed to retrieve the EXIF metadata\n"); printf("Size of the EXIF metadata: %d\n", (int)exif.size); } if (flag & XMP_FLAG) { WebPData xmp; err = WebPMuxGetChunk(mux, "XMP ", &xmp); RETURN_IF_ERROR("Failed to retrieve the XMP metadata\n"); printf("Size of the XMP metadata: %d\n", (int)xmp.size); } if ((flag & ALPHA_FLAG) && !(flag & (ANIMATION_FLAG | FRAGMENTS_FLAG))) { WebPMuxFrameInfo image; err = WebPMuxGetFrame(mux, 1, &image); if (err == WEBP_MUX_OK) { printf("Size of the image (with alpha): %d\n", (int)image.bitstream.size); } WebPDataClear(&image.bitstream); RETURN_IF_ERROR("Failed to retrieve the image\n"); } return WEBP_MUX_OK; }