101 lines
2.6 KiB
C++
101 lines
2.6 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 2018-2020 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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* @file
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* @~English
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*
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* @brief Definition of test sample for loading and displaying the layers of a 2D array texture.
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*
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* @author Mark Callow, github.com/MarkCallow.
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*/
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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 <assert.h>
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#include <algorithm>
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#include <time.h>
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#include <sstream>
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#include <vector>
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#include <ktx.h>
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#include "argparser.h"
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#include "TextureArray.h"
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#include "ltexceptions.h"
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#define member_size(type, member) sizeof(((type *)0)->member)
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const GLchar* pszFsArraySamplerDeclaration =
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"uniform mediump sampler2DArray uSampler;\n\n";
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const GLchar* pszArrayVsMain =
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"void main()\n"
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"{\n"
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" UVW = vec3(inUV, gl_InstanceID);\n"
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" mat4 modelView = ubo.view * ubo.instance[gl_InstanceID].model;\n"
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" gl_Position = ubo.projection * modelView * inPos;\n"
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"}";
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/* ------------------------------------------------------------------------- */
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LoadTestSample*
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TextureArray::create(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 TextureArray(width, height, szArgs, sBasePath);
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}
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/**
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* @internal
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* @class TextureArray
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* @~English
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*
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* @brief Test loading of 2D texture arrays.
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*/
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TextureArray::TextureArray(uint32_t width, uint32_t height,
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const char* const szArgs,
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const std::string sBasePath)
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: InstancedSampleBase(width, height, szArgs, sBasePath)
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{
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zoom = -15.0f;
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if (texTarget != GL_TEXTURE_2D_ARRAY) {
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std::stringstream message;
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message << "TextureArray requires an array texture.";
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throw std::runtime_error(message.str());
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}
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// Checking if KVData contains keys of interest would go here.
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instanceCount = textureInfo.numLayers;
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InstancedSampleBase::ShaderSource fs;
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InstancedSampleBase::ShaderSource vs;
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fs.push_back(pszInstancingFsDeclarations);
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fs.push_back(pszFsArraySamplerDeclaration);
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if (framebufferColorEncoding() == GL_LINEAR) {
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fs.push_back(pszSrgbEncodeFunc);
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fs.push_back(pszInstancingSrgbEncodeFsMain);
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} else {
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fs.push_back(pszInstancingFsMain);;
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}
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vs.push_back(pszInstancingVsDeclarations);
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vs.push_back(pszArrayVsMain);
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try {
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prepare(fs, vs);
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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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cleanup();
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throw;
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}
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bInitialized = true;
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}
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