Crop ratios and selection start, Vignette on empty layers, text colour previews (12.10c); mutation runs use 12 cores

kernels/AdjustPixels.h

@@ -64,7 +64,10 @@ void adjust_camera_raw_effects(uint8_t *rgba, size_t width, size_t height, size_
                                double scale);
 // Standalone Vignette: blends straight sRGB toward the selected edge color using Camera Raw's
 // falloff shape and Highlight Priority. Preserves the source alpha and premultiplied storage.
+// The vignette is shaped to the frame (in the image's pixels). With fillsClear it paints transparent pixels too;
+// without, it recolors only the pixels that are there.
 void adjust_colored_vignette(uint8_t *rgba, size_t width, size_t height, size_t stride,
+                             double frameX, double frameY, double frameWidth, double frameHeight, int fillsClear,
                              double amount, double midpoint, double roundness, double feather,
                              double highlights, double red, double green, double blue);
 // Local luminance contrast with independent shadow, midtone, and highlight gains.