Add initial wimmel program

1 files changed, 58 insertions, 0 deletions

diff --git a/util.h b/util.h
new file mode 100644
index 0000000..e0833cf
--- /dev/null
+++ b/util.h
@@ -0,0 +1,58 @@
+#ifndef _UTIL_H_
+#define _UTIL_H_
+
+#include <glib.h>
+#include <gtk/gtk.h>
+
+#include <string.h>
+
+typedef struct _point {
+	gint16 x, y;
+} point_t;
+#define POINT(_x, _y) ((point_t){.x=(_x), .y=(_y)})
+
+/* a vector is the same as a point */
+typedef point_t vector_t;
+#define VECTOR(_x, _y) POINT(_x, _y)
+
+static inline vector_t vector(point_t p1, point_t p2) {
+	return VECTOR(p2.x - p1.x, p2.y - p1.y); 
+}
+
+typedef struct _color {
+	guint8 r, g, b, a;
+} color_t;
+#define COLOR(_r, _g, _b, _a) ((color_t){.r=(_r), .g=(_g), .b=(_b), .a=(_a)})
+#define COL_MAX G_MAXUINT8
+
+typedef struct _color32 {
+	gint32 r, g, b;
+} color32_t;
+
+#define COLOR32(_r, _g, _b) ((color32_t){.r=(_r), .g=(_g), .b=(_b)})
+#define COL32_MAX G_MAXINT32
+
+color32_t color32_add(color32_t, color32_t);
+color32_t color32_mult(color32_t, gint);
+color32_t to_color32(color_t);
+
+typedef struct _colord {
+	gdouble r, g, b, a;
+} colord_t;
+colord_t colord_add(colord_t, colord_t);
+colord_t colord_mult(colord_t, gdouble);
+colord_t to_colord(color_t);
+#define COLORD(_r, _g, _b, _a) ((colord_t){.r=(_r), .g=(_g), .b=(_b), .a=(_a)})
+#define COLORD_MAX G_MAXDOUBLE
+
+void put_pixel(GdkPixbuf *pixbuf, point_t point, color_t color);
+
+color_t get_pixel(GdkPixbuf *pixbuf, point_t point);
+
+void color_to_yiq(color_t color, guint8 *y, guint8 *i, guint8 *q);
+
+color_t tint(color_t src, color_t tint_color);
+
+void ring_shift(void *_pntr, gint num, size_t size);
+
+#endif /* _UTIL_H_ */