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Add support for floating point main callback rates

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This commit is contained in:
nightmareci
2025-07-01 09:12:18 -07:00
committed by Ryan C. Gordon
parent 06cfea6a03
commit 9e6a6c01e4
2 changed files with 7 additions and 3 deletions
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4
include/SDL3/SDL_hints.h
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@@ -2500,6 +2500,10 @@ extern "C" {
* This defaults to 0, and specifying NULL for the hint's value will restore
* the default.
*
* This doesn't have to be an integer value. For example, "59.94" won't be
* rounded to an integer rate; the digits after the decimal are actually
* respected.
*
* This hint can be set anytime.
*
* \since This hint is available since SDL 3.2.0.

6
src/main/generic/SDL_sysmain_callbacks.c
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@@ -34,9 +34,9 @@ static void SDLCALL MainCallbackRateHintChanged(void *userdata, const char *name
if (iterate_after_waitevent) {
callback_rate_increment = 0;
} else {
const int callback_rate = newValue ? SDL_atoi(newValue) : 0;
if (callback_rate > 0) {
callback_rate_increment = ((Uint64) 1000000000) / ((Uint64) callback_rate);
const double callback_rate = newValue ? SDL_atof(newValue) : 0.0;
if (callback_rate > 0.0) {
callback_rate_increment = (Uint64) ((double) SDL_NS_PER_SECOND / callback_rate);
} else {
callback_rate_increment = 0;
}