mirror of
https://github.com/zserge/fenster.git
synced 2025-04-20 00:18:57 +03:00
75 lines
1.8 KiB
C
75 lines
1.8 KiB
C
#include "fenster.h"
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#include "fenster_audio.h"
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#define W 320
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#define H 240
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/* ============================================================
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* A very minimal example of a Fenster app:
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* - Opens a window
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* - Starts a loop
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* - Changes pixel colours based on some "shader" formula
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* - Sleeps if needed to maintain a frame rate of 60 FPS
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* - Closes a window
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* ============================================================ */
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static int run() {
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uint32_t buf[W * H];
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struct fenster f = {
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.title = "hello",
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.width = W,
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.height = H,
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.buf = buf,
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};
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struct fenster_audio fa = {0};
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fenster_open(&f);
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fenster_audio_open(&fa);
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uint32_t t, u = 0;
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float audio[FENSTER_AUDIO_BUFSZ];
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int64_t now = fenster_time();
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while (fenster_loop(&f) == 0) {
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t++;
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int n = fenster_audio_available(&fa);
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if (n > 0) {
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for (int i = 0; i < n; i++) {
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u++;
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/*audio[i] = (rand() & 0xff)/256.f;*/
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int x = u * 80/441;
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audio[i] = ((((x >> 10) & 42) * x)&0xff)/256.f;
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}
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fenster_audio_write(&fa, audio, n);
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}
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if (f.keys[27]) break;
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for (int i = 0; i < 320; i++) {
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for (int j = 0; j < 240; j++) {
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/* White noise: */
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/* fenster_pixel(&f, i, j) = (rand() << 16) ^ (rand() << 8) ^ rand(); */
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/* Colourful and moving: */
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/* fenster_pixel(&f, i, j) = i * j * t; */
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/* Munching squares: */
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fenster_pixel(&f, i, j) = i ^ j ^ t;
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}
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}
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int64_t time = fenster_time();
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if (time - now < 1000 / 60) {
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fenster_sleep(time - now);
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}
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now = time;
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}
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fenster_audio_close(&fa);
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fenster_close(&f);
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return 0;
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}
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#if defined(_WIN32)
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int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR pCmdLine,
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int nCmdShow) {
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(void)hInstance, (void)hPrevInstance, (void)pCmdLine, (void)nCmdShow;
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return run();
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}
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#else
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int main() { return run(); }
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#endif
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