Use 32bit instead of 64bit 3D render buffer on mobile

servers/rendering/renderer_rd/forward_mobile/render_forward_mobile.cpp

@@ -65,9 +65,13 @@ void RenderForwardMobile::RenderBufferDataForwardMobile::configure(RID p_color_b
 	color = p_color_buffer;
 	depth = p_depth_buffer;
 
-	// re-introduce setting up msaa? For now we ignore this...
+	RD::DataFormat color_format = RenderForwardMobile::singleton->_render_buffers_get_color_format();
 
 	if (p_msaa == RS::VIEWPORT_MSAA_DISABLED) {
+		if (color_format == RD::DATA_FORMAT_B10G11R11_UFLOAT_PACK32) {
+			// @TODO add a second color buffer for alpha as this format is RGB only
+		}
+
 		Vector<RID> fb;
 		fb.push_back(p_color_buffer);
 		fb.push_back(depth);
@@ -80,7 +84,7 @@ void RenderForwardMobile::RenderBufferDataForwardMobile::configure(RID p_color_b
 		} else {
 			tf.texture_type = RD::TEXTURE_TYPE_2D;
 		}
-		tf.format = RD::DATA_FORMAT_R16G16B16A16_SFLOAT;
+		tf.format = color_format;
 		tf.width = p_width;
 		tf.height = p_height;
 		tf.array_layers = view_count; // create a layer for every view
@@ -131,6 +135,13 @@ bool RenderForwardMobile::free(RID p_rid) {
 
 /* Render functions */
 
+RD::DataFormat RenderForwardMobile::_render_buffers_get_color_format() {
+	// Using 32bit buffers enables AFBC on mobile devices which should have a definate performance improvement (MALI G710 and newer support this on 64bit RTs)
+	// NO ALPHA and unsigned float.
+	// @TODO No alpha is an issue, recommendation here is to add a second RT for alpha
+	return RD::DATA_FORMAT_B10G11R11_UFLOAT_PACK32;
+}
+
 RID RenderForwardMobile::_setup_render_pass_uniform_set(RenderListType p_render_list, const RenderDataRD *p_render_data, RID p_radiance_texture, bool p_use_directional_shadow_atlas, int p_index) {
 	//there should always be enough uniform buffers for render passes, otherwise bugs
 	ERR_FAIL_INDEX_V(p_index, (int)scene_state.uniform_buffers.size(), RID());

servers/rendering/renderer_rd/forward_mobile/render_forward_mobile.h

@@ -151,6 +151,8 @@ protected:
 		}
 	};
 
+	virtual RD::DataFormat _render_buffers_get_color_format() override;
+
 	RID _setup_render_pass_uniform_set(RenderListType p_render_list, const RenderDataRD *p_render_data, RID p_radiance_texture, bool p_use_directional_shadow_atlas = false, int p_index = 0);
 	virtual void _render_scene(RenderDataRD *p_render_data, const Color &p_default_bg_color) override;
 

servers/rendering/renderer_rd/renderer_scene_render_rd.cpp

@@ -654,7 +654,7 @@ bool RendererSceneRenderRD::reflection_probe_instance_begin_render(RID p_instanc
 			//reflection atlas was unused, create:
 			RD::TextureFormat tf;
 			tf.array_layers = 6 * atlas->count;
-			tf.format = RD::DATA_FORMAT_R16G16B16A16_SFLOAT;
+			tf.format = _render_buffers_get_color_format();
 			tf.texture_type = RD::TEXTURE_TYPE_CUBE_ARRAY;
 			tf.mipmaps = mipmaps;
 			tf.width = atlas->size;
@@ -2118,6 +2118,10 @@ float RendererSceneRenderRD::render_buffers_get_volumetric_fog_detail_spread(RID
 	return rb->volumetric_fog->spread;
 }
 
+RD::DataFormat RendererSceneRenderRD::_render_buffers_get_color_format() {
+	return RD::DATA_FORMAT_R16G16B16A16_SFLOAT;
+}
+
 void RendererSceneRenderRD::render_buffers_configure(RID p_render_buffers, RID p_render_target, int p_width, int p_height, RS::ViewportMSAA p_msaa, RenderingServer::ViewportScreenSpaceAA p_screen_space_aa, bool p_use_debanding, uint32_t p_view_count) {
 	ERR_FAIL_COND_MSG(p_view_count == 0, "Must have atleast 1 view");
 
@@ -2144,7 +2148,7 @@ void RendererSceneRenderRD::render_buffers_configure(RID p_render_buffers, RID p
 		if (rb->view_count > 1) {
 			tf.texture_type = RD::TEXTURE_TYPE_2D_ARRAY;
 		}
-		tf.format = RD::DATA_FORMAT_R16G16B16A16_SFLOAT;
+		tf.format = _render_buffers_get_color_format();
 		tf.width = rb->width;
 		tf.height = rb->height;
 		tf.array_layers = rb->view_count; // create a layer for every view

servers/rendering/renderer_rd/renderer_scene_render_rd.h

@@ -1129,6 +1129,7 @@ public:
 
 	/* render buffers */
 
+	virtual RD::DataFormat _render_buffers_get_color_format();
 	virtual RID render_buffers_create() override;
 	virtual void render_buffers_configure(RID p_render_buffers, RID p_render_target, int p_width, int p_height, RS::ViewportMSAA p_msaa, RS::ViewportScreenSpaceAA p_screen_space_aa, bool p_use_debanding, uint32_t p_view_count) override;
 	virtual void gi_set_use_half_resolution(bool p_enable) override;