public float4[,] ApplyBrightnessContrastGamma( float4[,] _Source, float _Brightness, float _Contrast, float _Gamma )
{
int W = _Source.GetLength( 0 );
int H = _Source.GetLength( 1 );
float4[,] Result = new float4[W,H];
for ( int Y=0; Y < H; Y++ )
for ( int X=0; X < W; X++ ) {
float4 RGBA = _Source[X,Y];
RGBA.x = ApplyBrightnessContrastGamma( RGBA.x, _Brightness, _Contrast, _Gamma );
RGBA.y = ApplyBrightnessContrastGamma( RGBA.y, _Brightness, _Contrast, _Gamma );
RGBA.z = ApplyBrightnessContrastGamma( RGBA.z, _Brightness, _Contrast, _Gamma );
Result[X,Y] = RGBA;
}
return Result;
}
float4 BilinearSample( float4[,] _Source, float _X, float _Y ) {
int X = (int) Math.Floor( _X );
float x = _X - X;
int Y = (int) Math.Floor( _Y );
float y = _Y - Y;
int W = _Source.GetLength( 0 );
int H = _Source.GetLength( 1 );
float4 V00 = X >= 0 && Y >= 0 && X < W && Y < H ? _Source[X,Y] : float4.Zero;
X++;
float4 V01 = X >= 0 && Y >= 0 && X < W && Y < H ? _Source[X,Y] : float4.Zero;
Y++;
float4 V11 = X >= 0 && Y >= 0 && X < W && Y < H ? _Source[X,Y] : float4.Zero;
X--;
float4 V10 = X >= 0 && Y >= 0 && X < W && Y < H ? _Source[X,Y] : float4.Zero;
float4 V0 = (1.0f - x) * V00 + x * V01;
float4 V1 = (1.0f - x) * V10 + x * V11;
float4 Result = (1.0f - y) * V0 + y * V1;
return Result;
}
