dany/libwebp
1
0
Fork 0
mirror of https://github.com/webmproject/libwebp.git synced 2025-07-12 22:14:29 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity

Switch code to SDL2.

Browse Source 
Also simplify wasm html (now that it is suppported by all browsers).

Change-Id: I352b08594b93d3dd7d44832d4328b3546ccc1b90
This commit is contained in:
Vincent Rabaud
2023-09-28 10:18:23 +02:00
parent a429c0de64
commit 24d7f9cb6e
7 changed files with 83 additions and 120 deletions
Download Patch File Download Diff File Expand all files Collapse all files

81
extras/webp_to_sdl.c
View File

@ -20,88 +20,75 @@
#include "webp_to_sdl.h"
#include <stdio.h>
#include "src/webp/decode.h"
#if defined(WEBP_HAVE_JUST_SDL_H)
#include <SDL.h>
#else
#include <SDL/SDL.h>
#include <SDL2/SDL.h>
#endif
static int init_ok = 0;
int WebPToSDL(const char* data, unsigned int data_size) {
int ok = 0;
VP8StatusCode status;
WebPDecoderConfig config;
WebPBitstreamFeatures* const input = &config.input;
WebPDecBuffer* const output = &config.output;
SDL_Surface* screen = NULL;
SDL_Surface* surface = NULL;
if (!WebPInitDecoderConfig(&config)) {
fprintf(stderr, "Library version mismatch!\n");
return 0;
}
WebPBitstreamFeatures input;
uint8_t* output = NULL;
SDL_Window* window = NULL;
SDL_Renderer* renderer = NULL;
SDL_Texture* texture = NULL;
int width, height;
if (!init_ok) {
SDL_Init(SDL_INIT_VIDEO);
init_ok = 1;
}
status = WebPGetFeatures((uint8_t*)data, (size_t)data_size, &config.input);
status = WebPGetFeatures((uint8_t*)data, (size_t)data_size, &input);
if (status != VP8_STATUS_OK) goto Error;
width = input.width;
height = input.height;
screen = SDL_SetVideoMode(input->width, input->height, 32, SDL_SWSURFACE);
if (screen == NULL) {
fprintf(stderr, "Unable to set video mode (32bpp %dx%d)!\n",
input->width, input->height);
SDL_CreateWindowAndRenderer(width, height, 0, &window, &renderer);
if (window == NULL || renderer == NULL) {
fprintf(stderr, "Unable to create window or renderer!\n");
goto Error;
}
SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY,
"linear"); // make the scaled rendering look smoother.
SDL_RenderSetLogicalSize(renderer, width, height);
surface = SDL_CreateRGBSurface(SDL_SWSURFACE,
input->width, input->height, 32,
0x000000ffu, // R mask
0x0000ff00u, // G mask
0x00ff0000u, // B mask
0xff000000u); // A mask
if (surface == NULL) {
fprintf(stderr, "Unable to create %dx%d RGBA surface!\n",
input->width, input->height);
texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_ABGR8888,
SDL_TEXTUREACCESS_STREAMING, width, height);
if (texture == NULL) {
fprintf(stderr, "Unable to create %dx%d RGBA texture!\n", width, height);
goto Error;
}
if (SDL_MUSTLOCK(surface)) SDL_LockSurface(surface);
#if SDL_BYTEORDER == SDL_BIG_ENDIAN
output->colorspace = MODE_BGRA;
output = WebPDecodeBGRA((const uint8_t*)data, (size_t)data_size, &width,
&height);
#else
output->colorspace = MODE_RGBA;
output = WebPDecodeRGBA((const uint8_t*)data, (size_t)data_size, &width,
&height);
#endif
output->width = surface->w;
output->height = surface->h;
output->u.RGBA.rgba = surface->pixels;
output->u.RGBA.stride = surface->pitch;
output->u.RGBA.size = surface->pitch * surface->h;
output->is_external_memory = 1;
status = WebPDecode((const uint8_t*)data, (size_t)data_size, &config);
if (status != VP8_STATUS_OK) {
if (output == NULL) {
fprintf(stderr, "Error decoding image (%d)\n", status);
goto Error;
}
if (SDL_MUSTLOCK(surface)) SDL_UnlockSurface(surface);
if (SDL_BlitSurface(surface, NULL, screen, NULL) ||
SDL_Flip(screen)) {
goto Error;
}
SDL_UpdateTexture(texture, NULL, output, width * sizeof(uint32_t));
SDL_RenderClear(renderer);
SDL_RenderCopy(renderer, texture, NULL, NULL);
SDL_RenderPresent(renderer);
ok = 1;
Error:
SDL_FreeSurface(surface);
SDL_FreeSurface(screen);
WebPFreeDecBuffer(output);
// We should call SDL_DestroyWindow(window) but that makes .js fail.
SDL_DestroyRenderer(renderer);
SDL_DestroyTexture(texture);
WebPFree(output);
return ok;
}