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/*
* Copyright 2014 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>
#include <assert.h>
#include <stdint.h>
#define width 600
#define height 450
int main() {
uint8_t pixels[width * height * 4];
uint8_t *end = pixels + width * height * 4;
uint8_t *pixel = pixels;
SDL_Rect rect = {0, 0, width, height};
while (pixel != end) {
*pixel = (pixel - pixels) * 256 / (width * height * 4);
pixel++;
}
SDL_Init(SDL_INIT_VIDEO);
SDL_Surface *screen = SDL_SetVideoMode(width, height, 32, SDL_HWSURFACE);
SDL_Surface *image = SDL_CreateRGBSurfaceFrom(pixels, width, height, 32, width * 4,
0x000000ff,
0x0000ff00,
0x00ff0000,
0xff000000);
SDL_FillRect(screen, &rect, SDL_MapRGB(screen->format, 255, 0, 0));
SDL_BlitSurface(image, &rect, screen, &rect);
SDL_UpdateRect(screen, 0, 0, width, height);
printf("There should be a red to white gradient\n");
SDL_Quit();
return 0;
}
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