Gfx

src/draw.c

+#include "../utils/gfx/gfx.h"
+#include "field.h"
+/*
+(50, 50) → (75, 50)1 , (50, 50) → (72, 62), (50, 50) → (62, 72)
+(50, 50) → (50, 75), (50, 50) → (38, 72), (50, 50) → (28, 62)
+(50, 50) → (25, 50), (50, 50) → (28, 38), (50, 50) → (37, 28)
+(50, 50) → (50, 25), (50, 50) → (62, 28), (50, 50) → (72, 37)
+*/
+
+void gfx_draw_line(struct gfx_context_t *ctxt, coordinates_t p0, coordinates_t p1, uint32_t color) {
+    int dx = abs(p1.column - p0.column);
+    int sx = p0.column < p1.column ? 1 : -1;
+    int dy = -abs(p1.row - p0.row);
+    int sy = p0.row < p1.row ? 1 : -1;
+    int error = dx + dy;
+
+    while (true) {
+        gfx_putpixel(ctxt, p0.column, p0.row, color);
+
+        if (p0.column == p1.column && p0.row == p1.row)
+            break;
+
+        int e2 = 2 * error;
+
+        if (e2 >= dy) {
+            if (p0.column == p1.column)
+                break;
+            error = error + dy;
+            p0.column = p0.column + sx;
+        }
+
+        if (e2 <= dx) {
+            if (p0.row == p1.row)
+                break;
+            error = error + dx;
+            p0.row = p0.row + sy;
+        }
+    }
+}
+
+void gfx_draw_circle(struct gfx_context_t *ctxt, coordinates c, uint32_t r, uint32_t color) {
+    int x = 0;
+    int y = r;
+    int d = r - 1;
+    while(y >= x){ 
+        gfx_putpixel(ctxt, c.row + x, c.column + y, color);
+        gfx_putpixel(ctxt, c.row + y, c.column + x, color);
+        gfx_putpixel(ctxt, c.row - x, c.column + y, color);
+        gfx_putpixel(ctxt, c.row - y, c.column + x, color);
+        gfx_putpixel(ctxt, c.row + x, c.column - y, color);
+        gfx_putpixel(ctxt, c.row + y, c.column - x, color);
+        gfx_putpixel(ctxt, c.row - x, c.column - y, color);
+        gfx_putpixel(ctxt, c.row - y, c.column - x, color);
+        if(d >= 2*x){ 
+            d = d-2*x-1;
+            x++;
+        }else if(d < 2 * (r-y)){
+            d = d + 2*y-1;
+            y--;	
+        }else {
+            d = d + 2 * (y-x-1);
+            y--;
+            x++;
+        }
+    }
+}