drinkingtea/nostalgia
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[nostalgia/core/glfw] Put wait for event in main loop to prevent processor waste

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This commit is contained in:
Gary Talent 2022-02-10 21:31:00 -06:00
parent f9d3521fe7
commit 8847b2b2ed
2 changed files with 13 additions and 7 deletions
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10
src/nostalgia/core/glfw/core.cpp
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@ -30,19 +30,25 @@ ox::Result<ox::UniquePtr<Context>> init(ox::UniquePtr<ox::FileSystem> fs, const
ox::Error run(Context *ctx) noexcept { ox::Error run(Context *ctx) noexcept {
const auto id = ctx->windowerData<GlfwImplData>(); const auto id = ctx->windowerData<GlfwImplData>();
int sleepTime = 0;
while (!glfwWindowShouldClose(id->window)) { while (!glfwWindowShouldClose(id->window)) {
glfwPollEvents(); glfwPollEvents();
const auto ticks = ticksMs(ctx); const auto ticks = ticksMs(ctx);
if (id->wakeupTime <= ticks && id->eventHandler) { if (id->eventHandler) {
auto sleepTime = id->eventHandler(ctx); if (id->wakeupTime <= ticks) {
sleepTime = id->eventHandler(ctx);
if (sleepTime >= 0) { if (sleepTime >= 0) {
id->wakeupTime = ticks + static_cast<unsigned>(sleepTime); id->wakeupTime = ticks + static_cast<unsigned>(sleepTime);
} else { } else {
id->wakeupTime = ~uint64_t(0); id->wakeupTime = ~uint64_t(0);
} }
} }
} else {
sleepTime = 2;
}
draw(ctx); draw(ctx);
glfwSwapBuffers(id->window); glfwSwapBuffers(id->window);
glfwWaitEventsTimeout(sleepTime);
} }
// destroy GLFW window // destroy GLFW window
renderer::shutdown(ctx, ctx->rendererData<void>()); renderer::shutdown(ctx, ctx->rendererData<void>());