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Added fractional representation of refresh rate to SDL_DisplayMode

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This commit is contained in:
Sam Lantinga 2024-07-12 17:55:04 -07:00
parent 1162a1cb8e
commit 730d5cf2f8
14 changed files with 81 additions and 68 deletions
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11
src/render/SDL_render.c
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@ -918,21 +918,20 @@ static void SDL_CalculateSimulatedVSyncInterval(SDL_Renderer *renderer, SDL_Wind
{
SDL_DisplayID displayID = SDL_GetDisplayForWindow(window);
const SDL_DisplayMode *mode;
float refresh_rate;
int num, den;
if (displayID == 0) {
displayID = SDL_GetPrimaryDisplay();
}
mode = SDL_GetDesktopDisplayMode(displayID);
if (mode && mode->refresh_rate > 0.0f) {
refresh_rate = mode->refresh_rate;
if (mode && mode->refresh_rate_numerator > 0) {
num = mode->refresh_rate_numerator;
den = mode->refresh_rate_denominator;
} else {
/* Pick a good default refresh rate */
refresh_rate = 60.0f;
num = 60;
den = 1;
}
num = 100;
den = (int)(100 * refresh_rate);
renderer->simulate_vsync_interval_ns = (SDL_NS_PER_SECOND * num) / den;
}