minetest/irrlicht
1
0
Fork 0
mirror of https://github.com/minetest/irrlicht.git synced 2025-06-30 23:30:27 +02:00
Code Issues Projects Releases Wiki Activity

Drop gamma ramp code

Browse Source 
We definitely won't be wanting to set the gamma for the entire display in the future.
This commit is contained in:
sfan5
2022-07-18 21:19:30 +02:00
parent abebac8bd4
commit 538c9e5cde
11 changed files with 1 additions and 258 deletions
Download Patch File Download Diff File Expand all files Collapse all files

54
source/Irrlicht/CIrrDeviceStub.cpp
View File

@ -363,60 +363,6 @@ bool CIrrDeviceStub::isDeviceMotionAvailable()
return false;
}
/*!
*/
void CIrrDeviceStub::calculateGammaRamp ( u16 *ramp, f32 gamma, f32 relativebrightness, f32 relativecontrast )
{
s32 i;
s32 value;
s32 rbright = (s32) ( relativebrightness * (65535.f / 4 ) );
f32 rcontrast = 1.f / (255.f - ( relativecontrast * 127.5f ) );
gamma = gamma > 0.f ? 1.0f / gamma : 0.f;
for ( i = 0; i < 256; ++i )
{
value = (s32)(pow( rcontrast * i, gamma)*65535.f + 0.5f );
ramp[i] = (u16) core::s32_clamp ( value + rbright, 0, 65535 );
}
}
void CIrrDeviceStub::calculateGammaFromRamp ( f32 &gamma, const u16 *ramp )
{
/* The following is adapted from a post by Garrett Bass on OpenGL
Gamedev list, March 4, 2000.
*/
f32 sum = 0.0;
s32 i, count = 0;
gamma = 1.0;
for ( i = 1; i < 256; ++i ) {
if ( (ramp[i] != 0) && (ramp[i] != 65535) ) {
f32 B = (f32)i / 256.f;
f32 A = ramp[i] / 65535.f;
sum += (f32) ( logf(A) / logf(B) );
count++;
}
}
if ( count && sum ) {
gamma = 1.0f / (sum / count);
}
}
//! Set the current Gamma Value for the Display
bool CIrrDeviceStub::setGammaRamp( f32 red, f32 green, f32 blue, f32 brightness, f32 contrast )
{
return false;
}
//! Get the current Gamma Value for the Display
bool CIrrDeviceStub::getGammaRamp( f32 &red, f32 &green, f32 &blue, f32 &brightness, f32 &contrast )
{
return false;
}
//! Set the maximal elapsed time between 2 clicks to generate doubleclicks for the mouse. It also affects tripleclick behavior.
void CIrrDeviceStub::setDoubleClickTime( u32 timeMs )
{