yet another api rework, removal of integer types in public api, optionals at the end, some cleaning

src/rendering/twn_draw.c

@@ -36,8 +36,8 @@ void render_queue_clear(void) {
 }
 
 
-void draw_nine_slice(const char *texture_path, int texture_w, int texture_h, int border_thickness, Rect rect, Color color) {
-    const float bt = (float)border_thickness; /* i know! */
+void draw_nine_slice(const char *texture, Vec2 corners, Rect rect, float border_thickness, Color color) {
+    const float bt = border_thickness;
     const float bt2 = bt * 2; /* combined size of the two borders in an axis */
 
 
@@ -49,7 +49,7 @@ void draw_nine_slice(const char *texture_path, int texture_w, int texture_h, int
     };
 
     m_sprite(
-        m_set(path, texture_path),
+        m_set(texture, texture),
         m_set(rect, top_left),
         m_opt(texture_region, ((Rect) { 0, 0, bt, bt })),
         m_opt(color, color),
@@ -64,9 +64,9 @@ void draw_nine_slice(const char *texture_path, int texture_w, int texture_h, int
     };
 
     m_sprite(
-        m_set(path, texture_path),
+        m_set(texture, texture),
         m_set(rect, top_center),
-        m_opt(texture_region, ((Rect) { bt, 0, (float)texture_w - bt2, bt })),
+        m_opt(texture_region, ((Rect) { bt, 0, corners.x - bt2, bt })),
         m_opt(color, color),
     );
 
@@ -79,9 +79,9 @@ void draw_nine_slice(const char *texture_path, int texture_w, int texture_h, int
     };
 
     m_sprite(
-        m_set(path, texture_path),
+        m_set(texture, texture),
         m_set(rect, top_right),
-        m_opt(texture_region, ((Rect) { (float)texture_w - bt, 0, bt, bt })),
+        m_opt(texture_region, ((Rect) { corners.x - bt, 0, bt, bt })),
         m_opt(color, color),
     );
 
@@ -94,9 +94,9 @@ void draw_nine_slice(const char *texture_path, int texture_w, int texture_h, int
     };
 
     m_sprite(
-        m_set(path, texture_path),
+        m_set(texture, texture),
         m_set(rect, center_left),
-        m_opt(texture_region, ((Rect) { 0, bt, bt, (float)texture_h - bt2 })),
+        m_opt(texture_region, ((Rect) { 0, bt, bt, corners.y - bt2 })),
         m_opt(color, color),
     );
 
@@ -109,9 +109,9 @@ void draw_nine_slice(const char *texture_path, int texture_w, int texture_h, int
     };
 
     m_sprite(
-        m_set(path, texture_path),
+        m_set(texture, texture),
         m_set(rect, center_right),
-        m_opt(texture_region, ((Rect) { (float)texture_w - bt, bt, bt, (float)texture_h - bt2 })),
+        m_opt(texture_region, ((Rect) { corners.x - bt, bt, bt, corners.y - bt2 })),
         m_opt(color, color),
     );
 
@@ -124,9 +124,9 @@ void draw_nine_slice(const char *texture_path, int texture_w, int texture_h, int
     };
 
     m_sprite(
-        m_set(path, texture_path),
+        m_set(texture, texture),
         m_set(rect, bottom_left),
-        m_opt(texture_region, ((Rect) { 0, (float)texture_h - bt, bt, bt })),
+        m_opt(texture_region, ((Rect) { 0, corners.y - bt, bt, bt })),
         m_opt(color, color),
     );
 
@@ -139,9 +139,9 @@ void draw_nine_slice(const char *texture_path, int texture_w, int texture_h, int
     };
 
     m_sprite(
-        m_set(path, texture_path),
+        m_set(texture, texture),
         m_set(rect, bottom_center),
-        m_opt(texture_region, ((Rect) { bt, (float)texture_h - bt, (float)texture_w - bt2, bt })),
+        m_opt(texture_region, ((Rect) { bt, corners.y - bt, corners.x - bt2, bt })),
         m_opt(color, color),
     );
 
@@ -154,9 +154,9 @@ void draw_nine_slice(const char *texture_path, int texture_w, int texture_h, int
     };
 
     m_sprite(
-        m_set(path, texture_path),
+        m_set(texture, texture),
         m_set(rect, bottom_right),
-        m_opt(texture_region, ((Rect) { (float)texture_w - bt, (float)texture_h - bt, bt, bt })),
+        m_opt(texture_region, ((Rect) { corners.x - bt, corners.y - bt, bt, bt })),
         m_opt(color, color),
     );
 
@@ -169,9 +169,9 @@ void draw_nine_slice(const char *texture_path, int texture_w, int texture_h, int
     };
 
     m_sprite(
-        m_set(path, texture_path),
+        m_set(texture, texture),
         m_set(rect, center),
-        m_opt(texture_region, ((Rect) { bt, bt, (float)texture_w - bt2, (float)texture_h - bt2 })),
+        m_opt(texture_region, ((Rect) { bt, bt, corners.x - bt2, corners.y - bt2 })),
         m_opt(color, color),
     );
 }
@@ -358,18 +358,18 @@ void render(void) {
             float ratio = (float)ctx.window_dims.y / (float)ctx.base_render_height;
             int w = (int)((float)ctx.base_render_width * ratio);
             setup_viewport(
-                ctx.window_dims.x / 2 - w / 2,
+                (int)ctx.window_dims.x / 2 - w / 2,
                 0,
                 w,
-                ctx.window_dims.y
+                (int)ctx.window_dims.y
             );
         } else {
             float ratio = (float)ctx.window_dims.x / (float)ctx.base_render_width;
             int h = (int)((float)ctx.base_render_height * ratio);
             setup_viewport(
                 0,
-                ctx.window_dims.y / 2 - h / 2,
-                ctx.window_dims.x,
+                (int)ctx.window_dims.y / 2 - h / 2,
+                (int)ctx.window_dims.x,
                 h
             );
         }