init

shaders/debug_utils/hlsl/gbuffer.frag.hlsl

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+/* Copyright (c) 2024, Sascha Willems
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 the "License";
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+Texture2D textureEnvMap : register(t1);
+SamplerState samplerEnvMap : register(s1);
+
+struct VSOutput
+{
+float4 Pos : SV_POSITION;
+[[vk::location(0)]] float2 UV : TEXCOORD0;
+[[vk::location(1)]] float3 Normal : NORMAL0;
+[[vk::location(2)]] float3 ViewVec : TEXCOORD1;
+[[vk::location(3)]] float3 LightVec : TEXCOORD2;
+};
+
+struct FSOutput
+{
+	float4 Color0 : SV_TARGET0;
+	float4 Color1 : SV_TARGET1;
+};
+
+struct PushConstants
+{
+	float4 offset;
+	float4 color;
+	int object_type;
+};
+[[vk::push_constant]] PushConstants push_constants;
+
+FSOutput main(VSOutput input)
+{
+	FSOutput output = (FSOutput)0;
+	float4 color;
+
+	switch (push_constants.object_type) {
+		case 0: // Skysphere
+			{
+				color = textureEnvMap.Sample(samplerEnvMap, float2(input.UV.x, 1.0 - input.UV.y));
+			}
+			break;
+
+		case 1: // Phong shading
+			{
+				float3 ambient = push_constants.color.rgb * 0.5;
+				float3 N = normalize(input.Normal);
+				float3 L = normalize(input.LightVec);
+				float3 V = normalize(input.ViewVec);
+				float3 R = reflect(-L, N);
+				float3 diffuse = max(dot(N, L), 0.0).xxx * push_constants.color.rgb;
+				float3 specular = (pow(max(dot(R, V), 0.0), 8.0)).xxx;
+				color = float4(ambient + diffuse + specular, 1.0);
+			}
+			break;
+	}
+
+	// Base color into attachment 0
+	output.Color0 = float4(color.rgb, 1.0);
+
+	// Bright parts for bloom into attachment 1
+	float l = dot(output.Color0.rgb, float3(0.2126, 0.7152, 0.0722));
+	float threshold = 0.75;
+	output.Color1.rgb = (l > threshold) ? output.Color0.rgb : float3(0.0, 0.0, 0.0);
+	output.Color1.a = 1.0;
+	return output;
+}