Implement CanvasGroup and CanvasItem clipping

-Allows merging several 2D objects into a single draw operation
-Use current node to clip children nodes
-Further fixes to Vulkan barriers
-Changed font texture generation to white, fixes dark eges when blurred
-Other small misc fixes to backbuffer code.

1 files changed, 4 insertions, 1 deletions

diff --git a/servers/rendering/rasterizer_rd/rasterizer_canvas_rd.h b/servers/rendering/rasterizer_rd/rasterizer_canvas_rd.h
index 5791efa4e5..4a79134c24 100644
--- a/servers/rendering/rasterizer_rd/rasterizer_canvas_rd.h
+++ b/servers/rendering/rasterizer_rd/rasterizer_canvas_rd.h
@@ -391,6 +391,9 @@ class RasterizerCanvasRD : public RasterizerCanvas {
 
 	RID default_canvas_texture;
 
+	RID default_canvas_group_shader;
+	RID default_canvas_group_material;
+
 	RS::CanvasItemTextureFilter default_filter = RS::CANVAS_ITEM_TEXTURE_FILTER_LINEAR;
 	RS::CanvasItemTextureRepeat default_repeat = RS::CANVAS_ITEM_TEXTURE_REPEAT_DISABLED;
 
@@ -398,7 +401,7 @@ class RasterizerCanvasRD : public RasterizerCanvas {
 
 	inline void _bind_canvas_texture(RD::DrawListID p_draw_list, RID p_texture, RS::CanvasItemTextureFilter p_base_filter, RS::CanvasItemTextureRepeat p_base_repeat, RID &r_last_texture, PushConstant &push_constant, Size2 &r_texpixel_size); //recursive, so regular inline used instead.
 	void _render_item(RenderingDevice::DrawListID p_draw_list, const Item *p_item, RenderingDevice::FramebufferFormatID p_framebuffer_format, const Transform2D &p_canvas_transform_inverse, Item *&current_clip, Light *p_lights, PipelineVariants *p_pipeline_variants);
-	void _render_items(RID p_to_render_target, int p_item_count, const Transform2D &p_canvas_transform_inverse, Light *p_lights);
+	void _render_items(RID p_to_render_target, int p_item_count, const Transform2D &p_canvas_transform_inverse, Light *p_lights, bool p_to_backbuffer = false);
 
 	_FORCE_INLINE_ void _update_transform_2d_to_mat2x4(const Transform2D &p_transform, float *p_mat2x4);
 	_FORCE_INLINE_ void _update_transform_2d_to_mat2x3(const Transform2D &p_transform, float *p_mat2x3);