generated from Persson-dev/OpenGLComputeShader
82 lines
1.9 KiB
C++
82 lines
1.9 KiB
C++
#include "Shader.h"
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#include <iostream>
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#include <fstream>
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#include <glad/gl.h>
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uint32_t CreateComputeShader(const std::filesystem::path& path)
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{
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std::ifstream file(path);
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if (!file.is_open())
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{
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std::cerr << "Failed to open file: " << path.string() << std::endl;
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return -1;
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}
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std::ostringstream contentStream;
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contentStream << file.rdbuf();
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std::string shaderSource = contentStream.str();
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GLuint shaderHandle = glCreateShader(GL_COMPUTE_SHADER);
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const GLchar* source = (const GLchar*)shaderSource.c_str();
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glShaderSource(shaderHandle, 1, &source, 0);
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glCompileShader(shaderHandle);
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GLint isCompiled = 0;
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glGetShaderiv(shaderHandle, GL_COMPILE_STATUS, &isCompiled);
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if (isCompiled == GL_FALSE)
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{
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GLint maxLength = 0;
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glGetShaderiv(shaderHandle, GL_INFO_LOG_LENGTH, &maxLength);
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std::vector<GLchar> infoLog(maxLength);
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glGetShaderInfoLog(shaderHandle, maxLength, &maxLength, &infoLog[0]);
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std::cerr << infoLog.data() << std::endl;
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glDeleteShader(shaderHandle);
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return -1;
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}
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GLuint program = glCreateProgram();
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glAttachShader(program, shaderHandle);
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glLinkProgram(program);
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GLint isLinked = 0;
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glGetProgramiv(program, GL_LINK_STATUS, (int*)&isLinked);
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if (isLinked == GL_FALSE)
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{
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GLint maxLength = 0;
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glGetProgramiv(program, GL_INFO_LOG_LENGTH, &maxLength);
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std::vector<GLchar> infoLog(maxLength);
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glGetProgramInfoLog(program, maxLength, &maxLength, &infoLog[0]);
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std::cerr << infoLog.data() << std::endl;
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glDeleteProgram(program);
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glDeleteShader(shaderHandle);
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return -1;
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}
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glDetachShader(program, shaderHandle);
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return program;
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}
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uint32_t ReloadComputeShader(uint32_t shaderHandle, const std::filesystem::path& path)
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{
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uint32_t newShaderHandle = CreateComputeShader(path);
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// Return old shader if compilation failed
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if (newShaderHandle == -1)
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return shaderHandle;
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glDeleteProgram(shaderHandle);
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return newShaderHandle;
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}
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