Adding Variable Rate Shading support to Godot

Improve GI renderer and add VRS support
Implement render device has_feature and move subgroup settings to limit_get

1 files changed, 51 insertions, 2 deletions

diff --git a/servers/rendering/renderer_rd/storage_rd/texture_storage.cpp b/servers/rendering/renderer_rd/storage_rd/texture_storage.cpp
index 1109357a74..762ad685e8 100644
--- a/servers/rendering/renderer_rd/storage_rd/texture_storage.cpp
+++ b/servers/rendering/renderer_rd/storage_rd/texture_storage.cpp
@@ -349,7 +349,6 @@ TextureStorage::TextureStorage() {
 
 		Vector<uint8_t> pv;
 		pv.resize(16 * 4);
-
 		for (int i = 0; i < 16; i++) {
 			pv.set(i * 4 + 0, 0);
 			pv.set(i * 4 + 1, 0);
@@ -358,7 +357,6 @@ TextureStorage::TextureStorage() {
 		}
 
 		{
-			//take the chance and initialize decal atlas to something
 			Vector<Vector<uint8_t>> vpv;
 			vpv.push_back(pv);
 			decal_atlas.texture = RD::get_singleton()->texture_create(tformat, RD::TextureView(), vpv);
@@ -366,6 +364,29 @@ TextureStorage::TextureStorage() {
 		}
 	}
 
+	{ //create default VRS
+
+		RD::TextureFormat tformat;
+		tformat.format = RD::DATA_FORMAT_R8_UINT;
+		tformat.width = 4;
+		tformat.height = 4;
+		tformat.array_layers = 1;
+		tformat.usage_bits = RD::TEXTURE_USAGE_COLOR_ATTACHMENT_BIT | RD::TEXTURE_USAGE_VRS_ATTACHMENT_BIT | RD::TEXTURE_USAGE_SAMPLING_BIT | RD::TEXTURE_USAGE_STORAGE_BIT | RD::TEXTURE_USAGE_CAN_UPDATE_BIT;
+		tformat.texture_type = RD::TEXTURE_TYPE_2D_ARRAY;
+
+		Vector<uint8_t> pv;
+		pv.resize(4 * 4);
+		for (int i = 0; i < 4 * 4; i++) {
+			pv.set(i, 0);
+		}
+
+		{
+			Vector<Vector<uint8_t>> vpv;
+			vpv.push_back(pv);
+			default_rd_textures[DEFAULT_RD_TEXTURE_VRS] = RD::get_singleton()->texture_create(tformat, RD::TextureView(), vpv);
+		}
+	}
+
 	{
 		Vector<String> sdf_modes;
 		sdf_modes.push_back("\n#define MODE_LOAD\n");
@@ -2751,3 +2772,31 @@ void TextureStorage::render_target_set_backbuffer_uniform_set(RID p_render_targe
 	ERR_FAIL_COND(!rt);
 	rt->backbuffer_uniform_set = p_uniform_set;
 }
+
+void TextureStorage::render_target_set_vrs_mode(RID p_render_target, RS::ViewportVRSMode p_mode) {
+	RenderTarget *rt = render_target_owner.get_or_null(p_render_target);
+	ERR_FAIL_COND(!rt);
+
+	rt->vrs_mode = p_mode;
+}
+
+void TextureStorage::render_target_set_vrs_texture(RID p_render_target, RID p_texture) {
+	RenderTarget *rt = render_target_owner.get_or_null(p_render_target);
+	ERR_FAIL_COND(!rt);
+
+	rt->vrs_texture = p_texture;
+}
+
+RS::ViewportVRSMode TextureStorage::render_target_get_vrs_mode(RID p_render_target) const {
+	RenderTarget *rt = render_target_owner.get_or_null(p_render_target);
+	ERR_FAIL_COND_V(!rt, RS::VIEWPORT_VRS_DISABLED);
+
+	return rt->vrs_mode;
+}
+
+RID TextureStorage::render_target_get_vrs_texture(RID p_render_target) const {
+	RenderTarget *rt = render_target_owner.get_or_null(p_render_target);
+	ERR_FAIL_COND_V(!rt, RID());
+
+	return rt->vrs_texture;
+}