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MOHAWK: RIVEN: Delay less for slower systems

Some systems may take longer to process the game loop
than others so we delay by a variable amount so faster
and slower system execute the game loop the same number
of times per second (the fps is capped at 100).

Slower systems that take longer than 10ms to process the game
loop won't have any delay.
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dafioram committed Aug 8, 2018
1 parent 663a643 commit 9891838593d6dcf5d71f7348288efaedcd20a3f4
Showing with 5 additions and 1 deletion.
  1. +4 −1 engines/mohawk/riven.cpp
  2. +1 −0 engines/mohawk/riven.h
@@ -209,6 +209,7 @@ Common::Error MohawkEngine_Riven::run() {

void MohawkEngine_Riven::doFrame() {
// Update background running things
uint32 loopStart = _system->getMillis();
_sound->updateSLST();
_video->updateMovies();

@@ -234,9 +235,11 @@ void MohawkEngine_Riven::doFrame() {

// Update the screen once per frame
_system->updateScreen();
uint32 loopElapsed = _system->getMillis() - loopStart;

// Cut down on CPU usage
_system->delayMillis(10);
if (loopElapsed < 10)
_system->delayMillis(10 - loopElapsed);
}

void MohawkEngine_Riven::processInput() {
@@ -106,6 +106,7 @@ class MohawkEngine_Riven : public MohawkEngine {
bool hasFeature(EngineFeature f) const override;

void doFrame();
void processInput();

private:
// Datafiles

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