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// Copyright 2015 The Emscripten Authors. All rights reserved.
// Emscripten is available under two separate licenses, the MIT license and the
// University of Illinois/NCSA Open Source License. Both these licenses can be
// found in the LICENSE file.
#include <SDL.h>
#include <emscripten.h>
static void sdlError(const char *str)
{
fprintf(stderr, "Error at %s: %s\n", str, SDL_GetError());
emscripten_force_exit(1);
}
void draw(SDL_Window *window, SDL_Surface *surface) {
int x, y;
if (SDL_MUSTLOCK(surface)) {
if (SDL_LockSurface(surface) != 0) sdlError("SDL_LockSurface");
}
for (y = 0; y < 256; y++) {
Uint32 *p = (Uint32 *)(((Uint8 *)surface->pixels) +
surface->pitch * y);
for (x = 0; x < 256; x++) {
*(p++) = SDL_MapRGB(surface->format, x, x ^ y, y);
}
}
if (SDL_MUSTLOCK(surface)) SDL_UnlockSurface(surface);
if (SDL_UpdateWindowSurface(window) != 0)
sdlError("SDL_UpdateWindowSurface");
}
int verify(void) {
int res = EM_ASM_INT({
var ctx = Module['canvas'].getContext('2d');
var data = ctx.getImageData(0, 0, 256, 256).data;
var idx = 0;
for (var y = 0; y < 256; y++) {
for (var x = 0; x < 256; x++) {
if (data[idx ] !== x ||
data[idx + 1] !== (x ^ y) ||
data[idx + 2] !== y ||
data[idx + 3] !== 255) {
return 1;
}
idx += 4;
}
}
return 0;
});
printf("%s\n", res ? "FAIL" : "PASS");
return res;
}
int main(void) {
SDL_Window *window;
SDL_Surface *surface;
if (SDL_Init(SDL_INIT_VIDEO) != 0) sdlError("SDL_Init");
window = SDL_CreateWindow("SDL 2 test",
0, 0,
256, 256,
SDL_WINDOW_SHOWN);
if (window == NULL) sdlError("SDL_CreateWindow");
surface = SDL_GetWindowSurface(window);
if (surface == NULL) sdlError("SDL_GetWindowSurface");
draw(window, surface);
int result = verify();
REPORT_RESULT(result);
}
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