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https://github.com/Ryujinx/SDL.git
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b72938c861
An existing hint lets apps that don't need the timer resolution changed avoid this, to save battery, etc, but this fixes several problems in timing, audio callbacks not firing fast enough, etc. Fixes Bugzilla #2944.
99 lines
2.0 KiB
C
99 lines
2.0 KiB
C
/*
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* rectangles.c
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* written by Holmes Futrell
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* use however you want
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*/
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#include "SDL.h"
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#include <time.h>
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#define SCREEN_WIDTH 320
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#define SCREEN_HEIGHT 480
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int
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randomInt(int min, int max)
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{
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return min + rand() % (max - min + 1);
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}
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void
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render(SDL_Renderer *renderer)
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{
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Uint8 r, g, b;
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/* Clear the screen */
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SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
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SDL_RenderClear(renderer);
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/* Come up with a random rectangle */
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SDL_Rect rect;
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rect.w = randomInt(64, 128);
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rect.h = randomInt(64, 128);
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rect.x = randomInt(0, SCREEN_WIDTH);
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rect.y = randomInt(0, SCREEN_HEIGHT);
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/* Come up with a random color */
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r = randomInt(50, 255);
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g = randomInt(50, 255);
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b = randomInt(50, 255);
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SDL_SetRenderDrawColor(renderer, r, g, b, 255);
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/* Fill the rectangle in the color */
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SDL_RenderFillRect(renderer, &rect);
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/* update screen */
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SDL_RenderPresent(renderer);
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}
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int
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main(int argc, char *argv[])
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{
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SDL_Window *window;
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SDL_Renderer *renderer;
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int done;
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SDL_Event event;
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/* initialize SDL */
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if (SDL_Init(SDL_INIT_VIDEO) < 0) {
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printf("Could not initialize SDL\n");
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return 1;
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}
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/* seed random number generator */
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srand(time(NULL));
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/* create window and renderer */
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window =
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SDL_CreateWindow(NULL, 0, 0, SCREEN_WIDTH, SCREEN_HEIGHT,
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SDL_WINDOW_OPENGL);
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if (!window) {
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printf("Could not initialize Window\n");
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return 1;
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}
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renderer = SDL_CreateRenderer(window, -1, 0);
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if (!renderer) {
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printf("Could not create renderer\n");
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return 1;
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}
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/* Enter render loop, waiting for user to quit */
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done = 0;
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while (!done) {
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while (SDL_PollEvent(&event)) {
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if (event.type == SDL_QUIT) {
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done = 1;
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}
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}
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render(renderer);
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SDL_Delay(1);
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}
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/* shutdown SDL */
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SDL_Quit();
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return 0;
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}
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