Add ktx

2026-06-14 19:09:18 +01:00
parent 14bd1a9271
commit 13fa90a0e9
3958 changed files with 999286 additions and 4 deletions
@@ -0,0 +1,111 @@
+/* -*- tab-width: 4; -*- */
+/* vi: set sw=2 ts=4 expandtab: */
+
+/*
+ * Copyright 2017-2020 Mark Callow.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/**
+ * @internal
+ * @class Texture3d
+ * @~English
+ *
+ * @brief Definition of test sample for loading and displaying the slices of a 3d texture.
+ *
+ * @author Mark Callow, github.com/MarkCallow.
+ *
+ * @par Acknowledgement
+ * Thanks to Sascha Willems' - www.saschawillems.de - for the concept,
+ * the VulkanTextOverlay class and the shaders used by this test.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include <algorithm>
+#include <time.h> 
+#include <vector>
+
+#include "Texture3d.h"
+#include "ltexceptions.h"
+
+VulkanLoadTestSample*
+Texture3d::create(VulkanContext& vkctx,
+                 uint32_t width, uint32_t height,
+                 const char* const szArgs, const std::string sBasePath)
+{
+    return new Texture3d(vkctx, width, height, szArgs, sBasePath);
+}
+
+#define INSTANCE_COUNT_CONST_ID 1
+#define INSTANCES_DECLARED_IN_SHADER 30
+
+Texture3d::Texture3d(VulkanContext& vkctx,
+                 uint32_t width, uint32_t height,
+                 const char* const szArgs, const std::string sBasePath)
+        : InstancedSampleBase(vkctx, width, height, szArgs, sBasePath)
+{
+    zoom = -15.0f;
+
+    if (texture.depth == 1) {
+        std::stringstream message;
+
+        message << "Texture3d requires a 3d texture.";
+        throw std::runtime_error(message.str());
+    }
+
+    try {
+        prepare("instancing3d.frag.spv", "instancing3d.vert.spv",
+                INSTANCE_COUNT_CONST_ID, texture.depth,
+                INSTANCES_DECLARED_IN_SHADER);
+    } catch (std::exception& e) {
+        (void)e; // To quiet unused variable warnings from some compilers.
+        //cleanup(); // See explanation in TextureMipmap.cpp
+        throw;
+    }
+}
+
+#if 0
+// Addition of extra uniform buffer for the instance count is to work around
+// MoltenVK issue #issue 1421:
+//     https://github.com/KhronosGroup/MoltenVK/issues/1421.
+void
+Texture3d::addSubclassDescriptors(DescriptorBindings& descriptorBindings)
+{
+    descriptorBindings.push_back(vk::DescriptorSetLayoutBinding(
+      2, // Binding 2 : uniform buffer for instanceCount value.
+      vk::DescriptorType::eUniformBuffer,
+      1,
+      vk::ShaderStageFlagBits::eVertex
+    ));
+}
+#endif
+
+// Providing instanceCount via a push constant is a workaround for
+// MoltenVK issue #1421:
+//     https://github.com/KhronosGroup/MoltenVK/issues/1421.
+void
+Texture3d::addSubclassPushConstantRanges(PushConstantRanges& ranges)
+{
+    ranges.push_back(vk::PushConstantRange(
+      vk::ShaderStageFlagBits::eVertex,
+      0, // offset
+      sizeof(instanceCount)
+    ));
+}
+
+void
+Texture3d::setSubclassPushConstants(uint32_t bufferIndex)
+{
+    vkCmdPushConstants(
+        vkctx.drawCmdBuffers[bufferIndex],
+        pipelineLayout,
+        VK_SHADER_STAGE_VERTEX_BIT,
+        0,
+        sizeof(instanceCount),
+        &instanceCount
+    );
+}
+