mirror of
https://github.com/dolphin-emu/dolphin.git
synced 2024-12-27 23:34:35 +01:00
94 lines
2.1 KiB
GLSL
94 lines
2.1 KiB
GLSL
/*
|
|
[configuration]
|
|
|
|
[OptionRangeFloat]
|
|
GUIName = Distortion amount
|
|
OptionName = DISTORTION_FACTOR
|
|
MinValue = 1.0
|
|
MaxValue = 10.0
|
|
StepAmount = 0.5
|
|
DefaultValue = 4.0
|
|
|
|
[OptionRangeFloat]
|
|
GUIName = Eye Distance Offset
|
|
OptionName = EYE_OFFSET
|
|
MinValue = 0.0
|
|
MaxValue = 10.0
|
|
StepAmount = 0.25
|
|
DefaultValue = 5.0
|
|
|
|
[OptionRangeFloat]
|
|
GUIName = Zoom adjustment
|
|
OptionName = SIZE_ADJUST
|
|
MinValue = 0.0
|
|
MaxValue = 1.0
|
|
StepAmount = 0.025
|
|
DefaultValue = 0.5
|
|
|
|
[OptionRangeFloat]
|
|
GUIName = Aspect Ratio adjustment
|
|
OptionName = ASPECT_ADJUST
|
|
MinValue = 0.0
|
|
MaxValue = 1.0
|
|
StepAmount = 0.025
|
|
DefaultValue = 0.5
|
|
|
|
[/configuration]
|
|
*/
|
|
|
|
|
|
void main()
|
|
{
|
|
// Base Cardboard distortion parameters
|
|
float factor = GetOption(DISTORTION_FACTOR) * 0.01f;
|
|
float ka = factor * 3.0f;
|
|
float kb = factor * 5.0f;
|
|
|
|
// size and aspect adjustment
|
|
float sizeAdjust = 1.0f - GetOption(SIZE_ADJUST) + 0.5f;
|
|
float aspectAdjustment = 1.25f - GetOption(ASPECT_ADJUST);
|
|
|
|
// offset centering per eye
|
|
float stereoOffset = GetOption(EYE_OFFSET) * 0.01f;
|
|
float offsetAdd;
|
|
|
|
// layer0 = left eye, layer1 = right eye
|
|
if (src_layer == 1)
|
|
{
|
|
offsetAdd = stereoOffset;
|
|
}
|
|
else
|
|
{
|
|
offsetAdd = 0.0 - stereoOffset;
|
|
}
|
|
|
|
// convert coordinates to NDC space
|
|
float2 fragPos = (GetCoordinates() - 0.5f - float2(offsetAdd, 0.0f)) * 2.0f;
|
|
|
|
// Calculate the source location "radius" (distance from the centre of the viewport)
|
|
float destR = length(fragPos);
|
|
|
|
// find the radius multiplier
|
|
float srcR = destR * sizeAdjust + ( ka * pow(destR, 2.0) + kb * pow(destR, 4.0));
|
|
|
|
// Calculate the source vector (radial)
|
|
float2 correctedRadial = normalize(fragPos) * srcR;
|
|
|
|
// fix aspect ratio
|
|
float2 widenedRadial = correctedRadial * float2(aspectAdjustment, 1.0f);
|
|
|
|
// Transform the coordinates (from [-1,1]^2 to [0, 1]^2)
|
|
float2 uv = (widenedRadial/2.0f) + float2(0.5f, 0.5f) + float2(offsetAdd, 0.0f);
|
|
|
|
// Sample the texture at the source location
|
|
if (clamp(uv, 0.0, 1.0) != uv)
|
|
{
|
|
// black if beyond bounds
|
|
SetOutput(float4(0.0, 0.0, 0.0, 0.0));
|
|
}
|
|
else
|
|
{
|
|
SetOutput(SampleLocation(uv));
|
|
}
|
|
}
|