122 lines
2.9 KiB
C++
122 lines
2.9 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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#ifndef _INSTANCE_SAMPLE_BASE_H_
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#define _INSTANCE_SAMPLE_BASE_H_
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#include <vector>
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#include "GL3LoadTestSample.h"
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#include <glm/gtc/matrix_transform.hpp>
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#define VERTEX_BUFFER_BIND_ID 0
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#define ENABLE_VALIDATION false
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class InstancedSampleBase : public GL3LoadTestSample
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{
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public:
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InstancedSampleBase(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();
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virtual void resize(uint32_t width, uint32_t height);
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virtual void run(uint32_t msTicks);
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//virtual void getOverlayText(VulkanTextOverlay *textOverlay);
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protected:
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using ShaderSource = GL3LoadTestSample::ShaderSource;
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const GLuint texUnit;
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const GLuint uniformBufferBindId;
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GLenum texTarget;
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GLuint gnTexture;
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GLuint gnInstancingProg;
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GLuint gnUbo;
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ktx_transcode_fmt_e transcodeTarget;
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bool bInitialized;
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bool bIsMipmapped;
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struct textureInfo {
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uint32_t numLayers;
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uint32_t numLevels;
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uint32_t baseDepth;
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} textureInfo;
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uint32_t instanceCount;
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// Vertex layout for this example
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struct TAVertex {
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float pos[3];
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float uv[2];
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};
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struct MeshBuffer {
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uint32_t indexCount;
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glm::vec3 dim;
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GLuint gnVao;
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GLuint gnVbo[2];
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GLsizeiptr verticesOffset;
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GLsizeiptr indicesOffset;
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};
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MeshBuffer quad;
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struct UboInstanceData {
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// Model matrix
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glm::mat4 model;
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};
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struct {
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// Global matrices
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struct {
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glm::mat4 projection;
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glm::mat4 view;
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} matrices;
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// N.B. The UBO structure declared in the shader has the array of
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// instance data inside the structure rather than pointed at from the
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// structure. The start of the array will be aligned on a 16-byte
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// boundary as it starts with a matrix.
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//
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// Separate data for each instance
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UboInstanceData *instance;
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} uboVS;
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GLint uProgramUniforms;
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GLint uSampler;
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static const GLchar* pszInstancingFsDeclarations;
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static const GLchar* pszSrgbEncodeFunc;
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static const GLchar* pszInstancingFsMain;
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static const GLchar* pszInstancingSrgbEncodeFsMain;
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static const GLchar* pszInstancingVsDeclarations;
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void cleanup();
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// Setup vertices for a single uv-mapped quad
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void generateQuad();
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void prepareUniformBuffers();
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void updateUniformBufferMatrices();
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void prepareSampler();
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void prepareProgram(ShaderSource& fs, ShaderSource& vs);
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void prepare(ShaderSource& fs, ShaderSource& vs);
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void processArgs(std::string sArgs);
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virtual void viewChanged()
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{
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updateUniformBufferMatrices();
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}
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};
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#endif /* _INSTANCE_SAMPLE_BASE_H_ */
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