1 files changed, 56 insertions, 0 deletions
diff --git a/src/line.c b/src/line.c
new file mode 100644
index 0000000..6f0f749
--- /dev/null
+++ b/src/line.c
@@ -0,0 +1,56 @@
+/*
+** line.c for  in /home/gayot_o/prog/lib/sdl-digit
+** 
+** Made by olivier gayot
+** Login   <gayot_o@epitech.net>
+** 
+** Started on  Mon Apr 23 08:07:45 2012 olivier gayot
+** Last update Mon Apr 23 08:07:45 2012 olivier gayot
+*/
+
+#include	"sdl_digit.h"
+
+static void	perform_draw_line(SDL_Surface *, SDL_Rect, SDL_Rect, t_vect, Uint32);
+
+void		draw_line(SDL_Surface *surf, SDL_Rect r1, SDL_Rect r2, Uint32 color) {
+  t_vect	vect;
+  SDL_Rect	begin, end;
+
+  if (ABS(r2.x - r1.x) > ABS(r2.y - r1.y)) {
+    if (r1.x < r2.x) {
+      begin = r1;
+      end = r2;
+    }
+    else {
+      begin = r2;
+      end = r1;
+    }
+    vect.x = 1;
+    vect.y = (float)(end.y - begin.y) / (float)(end.x - begin.x);
+  }
+  else {
+    if (r1.y < r2.y) {
+      begin = r1;
+      end = r2;
+    }
+    else {
+      begin = r2;
+      end = r1;
+    }
+    vect.y = 1;
+    vect.x = (float)(end.x - begin.x) / (float)(end.y - begin.y);
+  }
+  perform_draw_line(surf, begin, end, vect, color);
+}
+
+static void	perform_draw_line(SDL_Surface *surf, SDL_Rect begin,
+    SDL_Rect end, t_vect vect, Uint32 color) {
+  float		x = (float)begin.x;
+  float		y = (float)begin.y;
+
+  while (x != (float)end.x || y != (float)end.y) {
+    set_pixel_color(surf, (int)x, (int)y, color);
+    x += vect.x;
+    y += vect.y;
+  }
+}