Camera Raw curves as Photoshop's: the fitted parametric curve, the tone curve on each channel, one drag in the graph (13.18)

kernels/AdjustPixels.h

@@ -48,12 +48,12 @@ void adjust_camera_raw(uint8_t *rgba, size_t width, size_t height, size_t stride
 // the radii match a full-size render. Grain is applied separately. Alpha is kept.
 // Blue over clipped shadows and red over clipped highlights, on top of the grade. Preview only.
 void adjust_camera_raw_clip_overlay(uint8_t *rgba, size_t width, size_t height, size_t stride, int shadows, int highlights);
-// Curve, Color Mixer, and Color Grading after the basic grade. `lumaLut` and the channel LUTs are 256
+// Curve, Color Mixer, and Color Grading after the basic grade. `toneLut` and the channel LUTs are 256
 // entries. `mixer` is 24 floats: hue, saturation, luminance for eight families, −1…1. Each point color is
 // 9 floats (hue, saturation, luminance, three shifts −1…1, three range half-widths). `grade` is four wheels
 // of hue turns, saturation 0…1, and luminance −1…1. `visualize` darkens pixels outside that point color.
 void adjust_camera_raw_curve_color(uint8_t *rgba, size_t width, size_t height, size_t stride,
-                                   const float *lumaLut, const float *redLut, const float *greenLut, const float *blueLut,
+                                   const float *toneLut, const float *redLut, const float *greenLut, const float *blueLut,
                                    double refineSaturation, const float *mixer, int pointCount, const float *points,
                                    const float *grade, double blending, double balance, int visualize);
 void adjust_camera_raw_effects(uint8_t *rgba, size_t width, size_t height, size_t stride,