ability to customize max render elements

should close #1339

drivers/gles2/rasterizer_gles2.cpp

@@ -10047,10 +10047,19 @@ RasterizerGLES2* RasterizerGLES2::get_singleton() {
 	return _singleton;
 };
 
+int RasterizerGLES2::RenderList::max_elements=RenderList::DEFAULT_MAX_ELEMENTS;
+
 RasterizerGLES2::RasterizerGLES2(bool p_compress_arrays,bool p_keep_ram_copy,bool p_default_fragment_lighting,bool p_use_reload_hooks) {
 
 	_singleton = this;
 
+	RenderList::max_elements=GLOBAL_DEF("rasterizer/max_render_elements",(int)RenderList::DEFAULT_MAX_ELEMENTS);
+	if (RenderList::max_elements>64000)
+		RenderList::max_elements=64000;
+	if (RenderList::max_elements<1024)
+		RenderList::max_elements=1024;
+	opaque_render_list.init();
+	alpha_render_list.init();
 	keep_copies=p_keep_ram_copy;
 	use_reload_hooks=p_use_reload_hooks;
 	pack_arrays=p_compress_arrays;

drivers/gles2/rasterizer_gles2.h

@@ -827,15 +827,18 @@ class RasterizerGLES2 : public Rasterizer {
 	GLuint gui_quad_buffer;
 
 
+
 	struct RenderList {
 
 		enum {
-			MAX_ELEMENTS=4096,
+			DEFAULT_MAX_ELEMENTS=4096,
 			MAX_LIGHTS=4,
 			SORT_FLAG_SKELETON=1,
 			SORT_FLAG_INSTANCING=2,
 		};
 
+		static int max_elements;
+
 		struct Element {
 
 
@@ -868,8 +871,8 @@ class RasterizerGLES2 : public Rasterizer {
 		};
 
 
-		Element _elements[MAX_ELEMENTS];
-		Element *elements[MAX_ELEMENTS];
+		Element *_elements;
+		Element **elements;
 		int element_count;
 
 		void clear() {
@@ -1004,17 +1007,28 @@ class RasterizerGLES2 : public Rasterizer {
 		}
 		_FORCE_INLINE_ Element* add_element() {
 
-			if (element_count>MAX_ELEMENTS)
+			if (element_count>=max_elements)
 				return NULL;
 			elements[element_count]=&_elements[element_count];
 			return elements[element_count++];
 		}
 
-		RenderList() {
+		void init() {
 
 			element_count = 0;
-			for (int i=0;i<MAX_ELEMENTS;i++)
+			elements=memnew_arr(Element*,max_elements);
+			_elements=memnew_arr(Element,max_elements);
+			for (int i=0;i<max_elements;i++)
 				elements[i]=&_elements[i]; // assign elements
+
+		}
+
+		RenderList() {
+
+		}
+		~RenderList() {
+			memdelete_arr(elements);
+			memdelete_arr(_elements);
 		}
 	};