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https://github.com/webmproject/libwebp.git
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44257cb826
(Debian clang-format version 19.1.7 (3+build4)) with `--style=Google`. Manual changes: * clang-format disabled around macros with stringification (mostly assembly) * some inline assembly strings were adjusted to avoid awkward line breaks * trailing commas, `//` or suffixes (`ull`) added to help array formatting * thread_utils.c: parameter comments were changed to the more common /*...=*/ style to improve formatting The automatically generated code under swig/ was skipped. Bug: 433996651 Change-Id: Iea3f24160d78d2a2653971cdf13fa932e47ff1b3
97 lines
2.7 KiB
C
97 lines
2.7 KiB
C
// Copyright 2017 Google Inc. All Rights Reserved.
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//
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// Use of this source code is governed by a BSD-style license
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// that can be found in the COPYING file in the root of the source
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// tree. An additional intellectual property rights grant can be found
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// in the file PATENTS. All contributing project authors may
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// be found in the AUTHORS file in the root of the source tree.
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// -----------------------------------------------------------------------------
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//
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// Simple WebP-to-SDL wrapper. Useful for emscripten.
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//
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// Author: James Zern (jzern@google.com)
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#ifdef HAVE_CONFIG_H
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#include "src/webp/config.h"
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#endif
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#if defined(WEBP_HAVE_SDL)
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#include <stdio.h>
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#include "src/webp/decode.h"
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#include "webp_to_sdl.h"
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#if defined(WEBP_HAVE_JUST_SDL_H)
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#include <SDL.h>
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#else
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#include <SDL2/SDL.h>
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#endif
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static int init_ok = 0;
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int WebPToSDL(const char* data, unsigned int data_size) {
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int ok = 0;
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VP8StatusCode status;
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WebPBitstreamFeatures input;
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uint8_t* output = NULL;
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SDL_Window* window = NULL;
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SDL_Renderer* renderer = NULL;
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SDL_Texture* texture = NULL;
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int width, height;
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if (!init_ok) {
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SDL_Init(SDL_INIT_VIDEO);
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init_ok = 1;
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}
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status = WebPGetFeatures((uint8_t*)data, (size_t)data_size, &input);
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if (status != VP8_STATUS_OK) goto Error;
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width = input.width;
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height = input.height;
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SDL_CreateWindowAndRenderer(width, height, 0, &window, &renderer);
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if (window == NULL || renderer == NULL) {
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fprintf(stderr, "Unable to create window or renderer!\n");
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goto Error;
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}
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SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY,
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"linear"); // make the scaled rendering look smoother.
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SDL_RenderSetLogicalSize(renderer, width, height);
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texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_ABGR8888,
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SDL_TEXTUREACCESS_STREAMING, width, height);
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if (texture == NULL) {
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fprintf(stderr, "Unable to create %dx%d RGBA texture!\n", width, height);
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goto Error;
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}
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#if SDL_BYTEORDER == SDL_BIG_ENDIAN
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output =
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WebPDecodeBGRA((const uint8_t*)data, (size_t)data_size, &width, &height);
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#else
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output =
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WebPDecodeRGBA((const uint8_t*)data, (size_t)data_size, &width, &height);
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#endif
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if (output == NULL) {
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fprintf(stderr, "Error decoding image (%d)\n", status);
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goto Error;
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}
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SDL_UpdateTexture(texture, NULL, output, width * sizeof(uint32_t));
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SDL_RenderClear(renderer);
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SDL_RenderCopy(renderer, texture, NULL, NULL);
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SDL_RenderPresent(renderer);
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ok = 1;
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Error:
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// We should call SDL_DestroyWindow(window) but that makes .js fail.
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SDL_DestroyRenderer(renderer);
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SDL_DestroyTexture(texture);
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WebPFree(output);
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return ok;
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}
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//------------------------------------------------------------------------------
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#endif // WEBP_HAVE_SDL
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