REVIEWED: DrawRectanglePro(), support TRIANGLES drawing

src/rshapes.c

@@ -662,8 +662,6 @@ void DrawRectangleRec(Rectangle rec, Color color)
 // Draw a color-filled rectangle with pro parameters
 void DrawRectanglePro(Rectangle rec, Vector2 origin, float rotation, Color color)
 {
-    rlCheckRenderBatchLimit(4);
-
     Vector2 topLeft = { 0 };
     Vector2 topRight = { 0 };
     Vector2 bottomLeft = { 0 };
@@ -701,7 +699,11 @@ void DrawRectanglePro(Rectangle rec, Vector2 origin, float rotation, Color color
         bottomRight.y = y + (dx + rec.width)*sinRotation + (dy + rec.height)*cosRotation;
     }
 
+#if defined(SUPPORT_QUADS_DRAW_MODE)
+    rlCheckRenderBatchLimit(4);
+
     rlSetTexture(texShapes.id);
+    
     rlBegin(RL_QUADS);
 
         rlNormal3f(0.0f, 0.0f, 1.0f);
@@ -720,7 +722,25 @@ void DrawRectanglePro(Rectangle rec, Vector2 origin, float rotation, Color color
         rlVertex2f(topRight.x, topRight.y);
 
     rlEnd();
+    
     rlSetTexture(0);
+#else
+    rlCheckRenderBatchLimit(6);
+
+    rlBegin(RL_TRIANGLES);
+        
+        rlColor4ub(color.r, color.g, color.b, color.a);
+
+        rlVertex2f(topLeft.x, topLeft.y);
+        rlVertex2f(bottomLeft.x, bottomLeft.y);
+        rlVertex2f(topRight.x, topRight.y);
+
+        rlVertex2f(topRight.x, topRight.y);
+        rlVertex2f(bottomLeft.x, bottomLeft.y);
+        rlVertex2f(bottomRight.x, bottomRight.y);
+
+    rlEnd();
+#endif
 }
 
 // Draw a vertical-gradient-filled rectangle