3. HueRotation.dctl

#line 2 "3. HueRotation.dctl"
#include "_2500.h"

// Rotate hue flight
// mainly rotate red primary, to the right is warmer/orange, and to the left colder/magenta
DEFINE_UI_PARAMS(rot_r, Overall Rotate Hue R -, DCTLUI_SLIDER_FLOAT, 0.05, -0.5, 0.5, 0.1)
// mainly rotate green primary, to the right is warmer/yellow, and to the left colder/cyan
DEFINE_UI_PARAMS(rot_g, G |, DCTLUI_SLIDER_FLOAT, 0.05, -0.5, 0.5, 0.1)
// mainly rotate blue primary, to the right is colder/cyan, and to the left is warmer/magenta
DEFINE_UI_PARAMS(rot_b, B |, DCTLUI_SLIDER_FLOAT, 0.23, -0.5, 0.5, 0.1)

// Highligh rotation direction is the same as the overall hue rotate, but it mainly affect bright values
DEFINE_UI_PARAMS(rot_rh, Highlight Rotate Hue R -, DCTLUI_SLIDER_FLOAT, 0.0, -0.5, 0.5, 0.1)
DEFINE_UI_PARAMS(rot_gh, G |, DCTLUI_SLIDER_FLOAT, 0.3, -0.5, 0.5, 0.1)
DEFINE_UI_PARAMS(rot_bh, B |, DCTLUI_SLIDER_FLOAT, -0.02, -0.5, 0.5, 0.1)

__DEVICE__ float3 transform(int p_Width, int p_Height, int p_X, int p_Y, float p_R, float p_G, float p_B) {   
        float3 rgb = make_float3(p_R, p_G, p_B);
        // TODO: Need to figure out what to do about these weights that are hardcoded Rec709
        float3 weights = avgweights(matrix_rec709_to_xyz);
        float lum = lumMask(rgb, weights.x, weights.y, weights.z);
        // Calculate two hue matrices, these matrices can't create negatives as this would break things later one, one will be applied as it
        // is and the other one will use the mask apply it
        float3x3 M1 = simpleHueMatrix(rot_rh, rot_gh, rot_bh);
        float3x3 M2 = simpleHueMatrix(rot_r, rot_g, rot_b);

        // apply the "highlight" hue matrix
        // mix the pre-highlight matrix and the post-matrix using the lum
        float3 m = _mix(rgb, vdot(M1,rgb), lum);

        // apply the overall  hue matrix
        float3 hue = vdot(M2,m);
        float3 ec = EnergyCorrection(rgb, hue, matrix_rec709_to_xyz);
        float3 out = maxf3(0, ec);
        return out;
}