morph

commit 92ca84cdf5c13181a2d54b3514d021d090cbc39e
parent 0672eddc1d4c16fff3d63e7f6e30b8a71029c2f8
Author: Pollux <pollux@pollux.codes>
Date:   Sat, 19 Jul 2025 16:31:35 -0500

feat: Generate larger palette

Signed-off-by: Pollux <pollux@pollux.codes>

Diffstat:
M
morph.c
 | 
36
+++++++++++++++++++++++++++++++++---

1 file changed, 33 insertions(+), 3 deletions(-)
diff --git a/morph.c b/morph.c
@@ -8,6 +8,8 @@
 
 #include <Imlib2.h>
 
+#define PRIMARY_COLOR_COUNT 32
+
 #define min(a, b) ((a) < (b) ? (a) : (b))
 #define max(a, b) ((a) > (b) ? (a) : (b))
 
@@ -283,6 +285,21 @@ cluster_image_colors(col_lab_t *colors, int color_count, int cluster_count) {
 	return cluster_colors;
 }
 
+col_lab_t
+hue_shift(col_lab_t in, float angle) {
+
+	col_lab_t       out;
+
+	float           cos = cosf(angle);
+	float           sin = sinf(angle);
+
+	out.l = in.l;
+	out.a = cos * in.a - sin * in.b;
+	out.b = sin * in.a + cos * in.b;
+
+	return out;
+}
+
 int
 main(int argc, char **argv) {
 
@@ -300,9 +317,22 @@ main(int argc, char **argv) {
 	}
 
 	col_lab_t      *primary_colors =
-	        cluster_image_colors(image_pixels_lab, pixel_count, 128);
-
-	// TODO: Combine primary colors with copies rotated in hue.
+	        cluster_image_colors(image_pixels_lab, pixel_count,
+	                             PRIMARY_COLOR_COUNT);
+
+	col_lab_t       palette[PRIMARY_COLOR_COUNT * 4];
+	float           palette_weights[PRIMARY_COLOR_COUNT * 4];
+
+	for(int c = 0; c < PRIMARY_COLOR_COUNT; c++) {
+		palette[4 * c] = primary_colors[c];
+		palette_weights[4 * c] = 1;
+		palette[4 * c + 1] = hue_shift(primary_colors[c], M_PI);
+		palette_weights[4 * c] = 0.5;
+		palette[4 * c + 2] = hue_shift(primary_colors[c], M_PI / 6);
+		palette_weights[4 * c] = 0.3;
+		palette[4 * c + 3] = hue_shift(primary_colors[c], -M_PI / 6);
+		palette_weights[4 * c] = 0.3;
+	}
 
 	// TODO: Match colors with target colors