view Xcode-iPhoneOS/Template/SDL Application/main.c @ 3469:8c5fb2a3b11d

RenderReadPixels and RenderWritePixels functions work with back buffer now and all asynchronous operations are flushed before reading or writing to backbuffer. Thanks Sam for clarification of this.
author Mike Gorchak <lestat@i.com.ua>
date Sat, 21 Nov 2009 06:17:50 +0000
parents 20326ba2bda2
children b6c7a6b07ebf
line wrap: on
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/*
 *	rectangles.c
 *	written by Holmes Futrell
 *	use however you want
 */

#include "SDL.h"
#include <time.h>

#define SCREEN_WIDTH 320
#define SCREEN_HEIGHT 480

int
randomInt(int min, int max)
{
    return min + rand() % (max - min + 1);
}

void
render(void)
{

    Uint8 r, g, b;
    /*  Come up with a random rectangle */
    SDL_Rect rect;
    rect.w = randomInt(64, 128);
    rect.h = randomInt(64, 128);
    rect.x = randomInt(0, SCREEN_WIDTH);
    rect.y = randomInt(0, SCREEN_HEIGHT);

    /* Come up with a random color */
    r = randomInt(50, 255);
    g = randomInt(50, 255);
    b = randomInt(50, 255);

    /*  Fill the rectangle in the color */
    SDL_RenderFill(r, g, b, 255, &rect);

    /* update screen */
    SDL_RenderPresent();

}

int
main(int argc, char *argv[])
{

    SDL_WindowID windowID;
    int done;
    SDL_Event event;

    /* initialize SDL */
    if (SDL_Init(SDL_INIT_VIDEO) < 0) {
        printf("Could not initialize SDL\n");
    }

    /* seed random number generator */
    srand(time(NULL));

    /* create window and renderer */
    windowID =
        SDL_CreateWindow(NULL, 0, 0, SCREEN_WIDTH, SCREEN_HEIGHT,
                         SDL_WINDOW_OPENGL | SDL_WINDOW_SHOWN);
    if (windowID == 0) {
        printf("Could not initialize Window\n");
    }
    if (SDL_CreateRenderer(windowID, -1, 0) != 0) {
        printf("Could not create renderer\n");
    }

    /* Fill screen with black */
    SDL_RenderFill(0, 0, 0, 0, NULL);

    /* Enter render loop, waiting for user to quit */
    done = 0;
    while (!done) {
        while (SDL_PollEvent(&event)) {
            if (event.type == SDL_QUIT) {
                done = 1;
            }
        }
        render();
        SDL_Delay(1);
    }

    /* shutdown SDL */
    SDL_Quit();

    return 0;
}