73 строки
1.9 KiB
C++
73 строки
1.9 KiB
C++
#include <SDL.h>
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#include <emscripten.h>
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static void sdlError(const char *str)
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{
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fprintf(stderr, "Error at %s: %s\n", str, SDL_GetError());
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emscripten_force_exit(1);
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}
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void draw(SDL_Window *window, SDL_Surface *surface) {
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int x, y;
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if (SDL_MUSTLOCK(surface)) {
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if (SDL_LockSurface(surface) != 0) sdlError("SDL_LockSurface");
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}
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for (y = 0; y < 256; y++) {
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Uint32 *p = (Uint32 *)(((Uint8 *)surface->pixels) +
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surface->pitch * y);
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for (x = 0; x < 256; x++) {
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*(p++) = SDL_MapRGB(surface->format, x, x ^ y, y);
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}
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}
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if (SDL_MUSTLOCK(surface)) SDL_UnlockSurface(surface);
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if (SDL_UpdateWindowSurface(window) != 0)
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sdlError("SDL_UpdateWindowSurface");
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}
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int verify(void) {
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int res = EM_ASM_INT_V({
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var ctx = Module['canvas'].getContext('2d');
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var data = ctx.getImageData(0, 0, 256, 256).data;
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var idx = 0;
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for (var y = 0; y < 256; y++) {
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for (var x = 0; x < 256; x++) {
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if (data[idx ] !== x ||
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data[idx + 1] !== (x ^ y) ||
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data[idx + 2] !== y ||
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data[idx + 3] !== 255) {
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return 1;
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}
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idx += 4;
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}
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}
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return 0;
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});
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printf("%s\n", res ? "FAIL" : "PASS");
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return res;
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}
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int main(void) {
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SDL_Window *window;
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SDL_Surface *surface;
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if (SDL_Init(SDL_INIT_VIDEO) != 0) sdlError("SDL_Init");
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window = SDL_CreateWindow("SDL 2 test",
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0, 0,
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256, 256,
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SDL_WINDOW_SHOWN);
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if (window == NULL) sdlError("SDL_CreateWindow");
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surface = SDL_GetWindowSurface(window);
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if (surface == NULL) sdlError("SDL_GetWindowSurface");
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draw(window, surface);
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int result = verify();
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REPORT_RESULT();
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}
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