cleanup and refactoring

raytracer/nvpro_core/nvvkhl/shaders/tonemapper.comp

@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2022, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * 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.
+ *
+ * SPDX-FileCopyrightText: Copyright (c) 2014-2021 NVIDIA CORPORATION
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+
+#version 450
+
+#extension GL_GOOGLE_include_directive : enable
+
+#include "dh_tonemap.h"
+#include "dh_comp.h"
+
+
+layout(set = 0, binding = eTonemapperInput) uniform sampler2D g_image;
+layout(set = 0, binding = eTonemapperOutput) writeonly uniform image2D g_out_image;
+
+layout(push_constant) uniform shaderInformation
+{
+  Tonemapper tm;
+};
+
+layout(local_size_x = WORKGROUP_SIZE, local_size_y = WORKGROUP_SIZE, local_size_z = 1) in;
+
+
+void main()
+{
+  if(gl_GlobalInvocationID.xy != clamp(gl_GlobalInvocationID.xy, vec2(0.0F), imageSize(g_out_image)))
+    return;
+
+  const vec2 pixel_center = vec2(gl_GlobalInvocationID.xy) + vec2(0.5F);
+  const vec2 i_uv         = pixel_center / vec2(imageSize(g_out_image));
+
+  vec4 R = texture(g_image, i_uv);
+
+  if(tm.isActive == 1)
+    R.xyz = applyTonemap(tm, R.xyz, i_uv);
+  R.a = 1.0F;  // No alpha, or it will blend with ImGui black viewport
+
+  imageStore(g_out_image, ivec2(gl_GlobalInvocationID.xy), R);
+}