blob: f4874999ac213243f2b5485f0b4a63b0c1256daf [file] [log] [blame]
// Copyright 2011 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 <stdio.h>
#include <SDL/SDL.h>
#ifdef __EMSCRIPTEN__
#include <emscripten.h>
extern "C" int main(int argc, char** argv) {
printf("hello, world!\n");
SDL_Surface *screen = SDL_SetVideoMode(256, 256, 32, SDL_SWSURFACE);
EM_ASM("SDL.defaults.copyOnLock = false; SDL.defaults.discardOnLock = true; SDL.defaults.opaqueFrontBuffer = false;");
if (SDL_MUSTLOCK(screen)) SDL_LockSurface(screen);
for (int i = 0; i < 256; i++) {
for (int j = 0; j < 256; j++) {
// Alpha behaves like in the browser, so write proper opaque pixels.
int alpha = 255;
// To emulate native behavior with blitting to screen, alpha component is ignored. Test that it is so by outputting
// data (and testing that it does get discarded)
int alpha = (i+j) % 255;
*((Uint32*)screen->pixels + i * 256 + j) = SDL_MapRGBA(screen->format, i, j, 255-i, alpha);
if (SDL_MUSTLOCK(screen)) SDL_UnlockSurface(screen);
printf("you should see a smoothly-colored square - no sharp lines but the square borders!\n");
printf("and here is some text that should be HTML-friendly: amp: |&| double-quote: |\"| quote: |'| less-than, greater-than, html-like tags: |<cheez></cheez>|\nanother line.\n");
return 0;