feat: add rasterization primitives

src/core/raster.h

@@ -0,0 +1,40 @@
+#ifndef RASTER_H_
+#define RASTER_H_
+
+#include "primitives.h"
+#include "stddef.h"
+#include "vector.h"
+
+typedef struct {
+  V2 p1;
+  V2 p2;
+  int winding;
+} Edge;
+
+typedef struct {
+  Edge *edges;
+  size_t count;
+  size_t capacity;
+} EdgeBuffer;
+
+void add_edge(EdgeBuffer *edges, Edge edge);
+
+void flatten_line(EdgeBuffer *edges, Line line);
+void flatten_polyline(EdgeBuffer *edges, Polyline *line);
+void flatten_polygon(EdgeBuffer *buffer, Polygon *line);
+
+typedef struct {
+  unsigned int width;
+  unsigned int height;
+  unsigned char *pixels; // Flat RGB8 array
+} Framebuffer;
+
+Framebuffer mk_framebuffer(unsigned int width, unsigned int height);
+
+void put_pixel(Framebuffer *fb, int x, int y, unsigned char r, unsigned char g,
+               unsigned char b);
+
+void draw_line(Framebuffer *fb, V2 a, V2 b, unsigned char r, unsigned char g,
+               unsigned char bl);
+
+#endif // RASTER_H_