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https://github.com/libretro/cpp-cheat.git
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46 lines
1.2 KiB
C
46 lines
1.2 KiB
C
/*
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Draw a rectangle with points.
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Bad idea, because the GPU can make that operation faster for quads,
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and SDL_rect uses that power by default.
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So just to see how bad the naive method is.
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*/
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#include "common.h"
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#define WINDOW_WIDTH 500
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#define WINDOW_HEIGHT WINDOW_WIDTH
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int main(void) {
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SDL_Event event;
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SDL_Renderer *renderer;
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SDL_Window *window;
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int x, y;
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SDL_Init(SDL_INIT_VIDEO);
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SDL_CreateWindowAndRenderer(WINDOW_WIDTH, WINDOW_WIDTH, 0, &window, &renderer);
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SDL_RenderPresent(renderer);
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common_fps_init();
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while (1) {
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if (SDL_PollEvent(&event) && event.type == SDL_QUIT)
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break;
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SDL_SetRenderDrawColor(renderer, 0, 0, 0, 0);
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SDL_RenderClear(renderer);
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for (x = 0; x < WINDOW_WIDTH; ++x) {
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for (y = 0; y < WINDOW_HEIGHT; ++y) {
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if ((x + y) & 1) {
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SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);
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SDL_RenderDrawPoint(renderer, x, y);
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}
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}
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}
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SDL_RenderPresent(renderer);
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common_fps_update_and_print();
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}
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SDL_DestroyRenderer(renderer);
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SDL_DestroyWindow(window);
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SDL_Quit();
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return EXIT_SUCCESS;
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}
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