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