add tools/Vulkan-Tools

1 files changed, 54 insertions, 0 deletions

diff --git a/tools/Vulkan-Tools/cube/cube.frag b/tools/Vulkan-Tools/cube/cube.frag
new file mode 100644
index 00000000..c68b9854
--- /dev/null
+++ b/tools/Vulkan-Tools/cube/cube.frag
@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2015-2016 The Khronos Group Inc.
+ * Copyright (c) 2015-2016 Valve Corporation
+ * Copyright (c) 2015-2016 LunarG, Inc.
+ *
+ * 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.
+ */
+/*
+ * Fragment shader for cube demo
+ */
+#version 400
+#extension GL_ARB_separate_shader_objects : enable
+#extension GL_ARB_shading_language_420pack : enable
+layout (binding = 1) uniform sampler2D tex;
+
+layout (location = 0) in vec4 texcoord;
+layout (location = 1) in vec3 frag_pos;
+layout (location = 0) out vec4 uFragColor;
+
+const vec3 lightDir= vec3(0.424, 0.566, 0.707);
+
+float linearToSrgb(float linear) {
+   if (linear <= 0.0031308) {
+      return linear * 12.92;
+   } else {
+      return (1.055 * pow(linear, 1.0/2.4)) - 0.055;
+   }
+}
+
+vec3 linearToSrgb(vec3 linear) {
+   return vec3(linearToSrgb(linear.r), linearToSrgb(linear.g), linearToSrgb(linear.b));
+}
+
+vec4 linearToSrgb(vec4 linear) {
+   return vec4(linearToSrgb(linear.rgb), linear.a);
+}
+
+void main() {
+   vec3 dX = dFdx(frag_pos);
+   vec3 dY = dFdy(frag_pos);
+   vec3 normal = normalize(cross(dX,dY));
+   float light = max(0.0, dot(lightDir, normal));
+   uFragColor = linearToSrgb(light * texture(tex, texcoord.xy));
+}