Add ktx

ktx/tests/loadtests/vkloadtests/TextureMipmap.cpp

@@ -0,0 +1,77 @@
+/* -*- tab-width: 4; -*- */
+/* vi: set sw=2 ts=4 expandtab: */
+
+/*
+ * Copyright 2017-2020 Mark Callow.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/**
+ * @internal
+ * @class TextureMipmap
+ * @~English
+ *
+ * @brief Definition of test sample for loading and displaying all the levels of a 2D mipmapped 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 <assert.h>
+#include <algorithm>
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <vector>
+
+#include "TextureMipmap.h"
+#include "ltexceptions.h"
+
+#include <ktxvulkan.h>
+
+VulkanLoadTestSample*
+TextureMipmap::create(VulkanContext& vkctx,
+                 uint32_t width, uint32_t height,
+                 const char* const szArgs, const std::string sBasePath)
+{
+    return new TextureMipmap(vkctx, width, height, szArgs, sBasePath);
+}
+
+#define INSTANCE_COUNT_CONST_ID 1
+#define INSTANCES_DECLARED_IN_SHADER 16
+
+TextureMipmap::TextureMipmap(VulkanContext& vkctx,
+                 uint32_t width, uint32_t height,
+                 const char* const szArgs, const std::string sBasePath)
+        : InstancedSampleBase(vkctx, width, height, szArgs, sBasePath)
+{
+    zoom = -18.0f;
+
+    if (texture.levelCount == 1) {
+        std::stringstream message;
+
+        message << "TextureMipmap requires a mipmapped texture.";
+        throw std::runtime_error(message.str());
+    }
+
+    try {
+        prepare("instancinglod.frag.spv", "instancinglod.vert.spv",
+                INSTANCE_COUNT_CONST_ID, texture.levelCount,
+                INSTANCES_DECLARED_IN_SHADER);
+
+    } catch (std::exception& e) {
+        (void)e; // To quiet unused variable warnings from some compilers.
+        // For reasons I don't understand ~InstancedSampleBase is called
+        // during the throw before the exception is caught. ~InstancedSampleBase
+        // also calls cleanup(). In Texture, an identically structured class
+        // which does not have a base class between it and LoadTestSample, the
+        // destructor is not called during throw.
+        //cleanup();
+        throw;
+    }
+}