From c55004711c02e52b571e7234bd9b743111b9e593 Mon Sep 17 00:00:00 2001
From: Ioannis Tsakpinis <iotsakp@gmail.com>
Date: Fri, 3 Jun 2016 13:22:41 +0300
Subject: [PATCH] Add the AMD_gcn_shader Vulkan extension

---
 .../lwjgl/vulkan/templates/AMD_gcn_shader.kt  | 72 +++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100644 modules/templates/src/main/kotlin/org/lwjgl/vulkan/templates/AMD_gcn_shader.kt

diff --git a/modules/templates/src/main/kotlin/org/lwjgl/vulkan/templates/AMD_gcn_shader.kt b/modules/templates/src/main/kotlin/org/lwjgl/vulkan/templates/AMD_gcn_shader.kt
new file mode 100644
index 0000000000..978e82db87
--- /dev/null
+++ b/modules/templates/src/main/kotlin/org/lwjgl/vulkan/templates/AMD_gcn_shader.kt
@@ -0,0 +1,72 @@
+/*
+ * Copyright LWJGL. All rights reserved.
+ * License terms: http://lwjgl.org/license.php
+ */
+package org.lwjgl.vulkan.templates
+
+import org.lwjgl.generator.*
+import org.lwjgl.vulkan.*
+
+val AMD_gcn_shader = "AMDGCNShader".nativeClassVK("AMD_gcn_shader", postfix = AMD) {
+	documentation =
+		"""
+		This extension adds support for the {@code SPV_AMD_gcn_shader} SPIR-V extension in Vulkan.
+
+		This extension is written to provide the functionality of the {@code GL_AMD_gcn_shader}, OpenGL Shading Language Specification extension, for SPIR-V.
+
+		This extension exposes miscellaneous features of the AMD "Graphics Core Next" shader architecture. This includes cube map query functions and a
+		functionality to query the elapsed shader core time.
+
+		This extension adds the following extended instructions:
+
+		<h3>CubeFaceCoordAMD</h3>
+
+		The function {@code CubeFaceCoordAMD} returns a two-component floating point vector that represents the 2D texture coordinates that would be used for accessing
+		the selected cube map face for the given cube map texture coordinates given as parameter P.
+
+		The operand {@code P} must be a pointer to a 3-component 32-bit floating-point vector.
+
+		This instruction is only valid in Fragment, Geometry, GLCompute, TessellationControl, TessellationEvaluation and Vertex execution models.
+
+		<h3>CubeFaceIndexAMD</h3>
+
+		The function {@code CubeFaceIndexAMD} returns a single floating point value that represents the index of the cube map face that would be accessed by
+		texture lookup functions for the cube map texture coordinates given as parameter. The returned value correspond to cube map faces as follows:
+		${ul(
+			"0.0 for the cube map face facing the positive X direction",
+			"1.0 for the cube map face facing the negative X direction",
+			"2.0 for the cube map face facing the positive Y direction",
+			"3.0 for the cube map face facing the negative Y direction",
+			"4.0 for the cube map face facing the positive Z direction",
+			"5.0 for the cube map face facing the negative Z direction"
+		)}
+
+		The operand {@code P} must be a 3-component 32-bit floating-point vector.
+
+		This instruction is only valid in Fragment, Geometry, GLCompute, TessellationControl, TessellationEvaluation and Vertex execution models.
+
+		<h3>TimeAMD</h3>
+
+		The {@code TimeAMD} function returns a 64-bit value representing the current execution clock as seen by the shader processor. Time monotonically
+		increments as the processor executes instructions. The returned time will wrap after it exceeds the maximum value representable in 64 bits. The units
+		of time are not defined and need not be constant. Time is not dynamically uniform. That is, shader invocations executing as part of a single draw or
+		dispatch will not necessarily see the same value of time. Time is also not guaranteed to be consistent across shader stages. For example, there is no
+		requirement that time sampled inside a fragment shader invocation will be greater than the time sampled in the vertex that lead to its execution.
+
+		This instruction is only valid in Fragment, Geometry, GLCompute, TessellationControl, TessellationEvaluation and Vertex execution models.
+
+		Use of this instruction requires declaration of the {@code Int64} capability.
+		"""
+
+	IntConstant(
+		"The extension specification version.",
+
+		"AMD_GCN_SHADER_SPEC_VERSION".."1"
+	)
+
+	StringConstant(
+		"The extension name.",
+
+		"AMD_GCN_SHADER_EXTENSION_NAME".."VK_AMD_gcn_shader"
+	)
+}
\ No newline at end of file