Add pixel scaling.

1 files changed, 21 insertions, 0 deletions

diff --git a/gfx-iso/src/isogfx.c b/gfx-iso/src/isogfx.c
index 17b88b2..ee33cad 100644
--- a/gfx-iso/src/isogfx.c
+++ b/gfx-iso/src/isogfx.c
@@ -603,6 +603,27 @@ void isogfx_draw_tile(IsoGfx* iso, int x, int y, Tile tile) {
   draw_tile(iso, so, tile);
 }
 
+bool isogfx_resize(IsoGfx* iso, int screen_width, int screen_height) {
+  assert(iso);
+  assert(iso->screen);
+
+  const int current_size = iso->screen_width * iso->screen_height;
+  const int new_size     = screen_width * screen_height;
+
+  if (new_size > current_size) {
+    Pixel* new_screen = calloc(new_size, sizeof(Pixel));
+    if (new_screen) {
+      free(iso->screen);
+      iso->screen = new_screen;
+    } else {
+      return false;
+    }
+  }
+  iso->screen_width  = screen_width;
+  iso->screen_height = screen_height;
+  return true;
+}
+
 const Pixel* isogfx_get_screen_buffer(const IsoGfx* iso) {
   assert(iso);
   return iso->screen;