Improvements to VRS/Foveated rendering

5 files changed, 15 insertions, 1 deletions

diff --git a/drivers/d3d12/rendering_device_driver_d3d12.cpp b/drivers/d3d12/rendering_device_driver_d3d12.cpp
index fc7aa62aae..9407826ebf 100644
--- a/drivers/d3d12/rendering_device_driver_d3d12.cpp
+++ b/drivers/d3d12/rendering_device_driver_d3d12.cpp
@@ -5912,6 +5912,9 @@ uint64_t RenderingDeviceDriverD3D12::limit_get(Limit p_limit) {
 		case LIMIT_VRS_TEXEL_WIDTH:
 		case LIMIT_VRS_TEXEL_HEIGHT:
 			return vrs_capabilities.ss_image_tile_size;
+		case LIMIT_VRS_MAX_FRAGMENT_WIDTH:
+		case LIMIT_VRS_MAX_FRAGMENT_HEIGHT:
+			return vrs_capabilities.ss_max_fragment_size;
 		default: {
 #ifdef DEV_ENABLED
 			WARN_PRINT("Returning maximum value for unknown limit " + itos(p_limit) + ".");
@@ -6218,6 +6221,7 @@ Error RenderingDeviceDriverD3D12::_check_capabilities() {
 				vrs_capabilities.primitive_in_multiviewport = options6.PerPrimitiveShadingRateSupportedWithViewportIndexing;
 				vrs_capabilities.ss_image_supported = true;
 				vrs_capabilities.ss_image_tile_size = options6.ShadingRateImageTileSize;
+				vrs_capabilities.ss_max_fragment_size = 8; // TODO figure out if this is supplied and/or needed
 				vrs_capabilities.additional_rates_supported = options6.AdditionalShadingRatesSupported;
 			}
 		}
diff --git a/drivers/d3d12/rendering_device_driver_d3d12.h b/drivers/d3d12/rendering_device_driver_d3d12.h
index 61da9a5169..8e1223bdaa 100644
--- a/drivers/d3d12/rendering_device_driver_d3d12.h
+++ b/drivers/d3d12/rendering_device_driver_d3d12.h
@@ -105,6 +105,7 @@ class RenderingDeviceDriverD3D12 : public RenderingDeviceDriver {
 		bool primitive_in_multiviewport = false;
 		bool ss_image_supported = false; // We can provide a density map attachment on our framebuffer.
 		uint32_t ss_image_tile_size = 0;
+		uint32_t ss_max_fragment_size = 0;
 		bool additional_rates_supported = false;
 	};
 
diff --git a/drivers/gles3/storage/texture_storage.h b/drivers/gles3/storage/texture_storage.h
index ef310262c7..8a03d72b9b 100644
--- a/drivers/gles3/storage/texture_storage.h
+++ b/drivers/gles3/storage/texture_storage.h
@@ -672,6 +672,8 @@ public:
 
 	virtual void render_target_set_vrs_mode(RID p_render_target, RS::ViewportVRSMode p_mode) override {}
 	virtual RS::ViewportVRSMode render_target_get_vrs_mode(RID p_render_target) const override { return RS::VIEWPORT_VRS_DISABLED; }
+	virtual void render_target_set_vrs_update_mode(RID p_render_target, RS::ViewportVRSUpdateMode p_mode) override {}
+	virtual RS::ViewportVRSUpdateMode render_target_get_vrs_update_mode(RID p_render_target) const override { return RS::VIEWPORT_VRS_UPDATE_DISABLED; }
 	virtual void render_target_set_vrs_texture(RID p_render_target, RID p_texture) override {}
 	virtual RID render_target_get_vrs_texture(RID p_render_target) const override { return RID(); }
 
diff --git a/drivers/vulkan/rendering_device_driver_vulkan.cpp b/drivers/vulkan/rendering_device_driver_vulkan.cpp
index 803555cb07..339d0782bf 100644
--- a/drivers/vulkan/rendering_device_driver_vulkan.cpp
+++ b/drivers/vulkan/rendering_device_driver_vulkan.cpp
@@ -758,11 +758,13 @@ Error RenderingDeviceDriverVulkan::_check_device_capabilities() {
 				vrs_capabilities.min_texel_size.y = vrs_properties.minFragmentShadingRateAttachmentTexelSize.height;
 				vrs_capabilities.max_texel_size.x = vrs_properties.maxFragmentShadingRateAttachmentTexelSize.width;
 				vrs_capabilities.max_texel_size.y = vrs_properties.maxFragmentShadingRateAttachmentTexelSize.height;
+				vrs_capabilities.max_fragment_size.x = vrs_properties.maxFragmentSize.width; // either 4 or 8
+				vrs_capabilities.max_fragment_size.y = vrs_properties.maxFragmentSize.height; // generally the same as width
 
 				// We'll attempt to default to a texel size of 16x16.
 				vrs_capabilities.texel_size = Vector2i(16, 16).clamp(vrs_capabilities.min_texel_size, vrs_capabilities.max_texel_size);
 
-				print_verbose(String("  Attachment fragment shading rate") + String(", min texel size: (") + itos(vrs_capabilities.min_texel_size.x) + String(", ") + itos(vrs_capabilities.min_texel_size.y) + String(")") + String(", max texel size: (") + itos(vrs_capabilities.max_texel_size.x) + String(", ") + itos(vrs_capabilities.max_texel_size.y) + String(")"));
+				print_verbose(String("  Attachment fragment shading rate") + String(", min texel size: (") + itos(vrs_capabilities.min_texel_size.x) + String(", ") + itos(vrs_capabilities.min_texel_size.y) + String(")") + String(", max texel size: (") + itos(vrs_capabilities.max_texel_size.x) + String(", ") + itos(vrs_capabilities.max_texel_size.y) + String(")") + String(", max fragment size: (") + itos(vrs_capabilities.max_fragment_size.x) + String(", ") + itos(vrs_capabilities.max_fragment_size.y) + String(")"));
 			}
 
 		} else {
@@ -4887,6 +4889,10 @@ uint64_t RenderingDeviceDriverVulkan::limit_get(Limit p_limit) {
 			return vrs_capabilities.texel_size.x;
 		case LIMIT_VRS_TEXEL_HEIGHT:
 			return vrs_capabilities.texel_size.y;
+		case LIMIT_VRS_MAX_FRAGMENT_WIDTH:
+			return vrs_capabilities.max_fragment_size.x;
+		case LIMIT_VRS_MAX_FRAGMENT_HEIGHT:
+			return vrs_capabilities.max_fragment_size.y;
 		default:
 			ERR_FAIL_V(0);
 	}
diff --git a/drivers/vulkan/rendering_device_driver_vulkan.h b/drivers/vulkan/rendering_device_driver_vulkan.h
index 70c4cebba5..e70019962a 100644
--- a/drivers/vulkan/rendering_device_driver_vulkan.h
+++ b/drivers/vulkan/rendering_device_driver_vulkan.h
@@ -87,6 +87,7 @@ class RenderingDeviceDriverVulkan : public RenderingDeviceDriver {
 
 		Size2i min_texel_size;
 		Size2i max_texel_size;
+		Size2i max_fragment_size;
 
 		Size2i texel_size; // The texel size we'll use
 	};