82 lines
1.8 KiB
C++
82 lines
1.8 KiB
C++
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#include <Dengine\Shader.h>
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#include <fstream>
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#include <iostream>
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namespace Dengine
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{
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INTERNAL std::string stringFromFile(const std::string &filename)
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{
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std::ifstream file;
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file.open(filename.c_str(), std::ios::in | std::ios::binary);
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std::string output;
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std::string line;
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if (!file.is_open())
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{
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std::runtime_error(std::string("Failed to open file: ") + filename);
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}
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else
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{
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while (file.good())
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{
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std::getline(file, line);
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output.append(line + "\n");
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}
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}
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file.close();
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return output;
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}
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INTERNAL GLuint createShaderFromPath(std::string path, GLuint shadertype)
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{
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std::string shaderSource = stringFromFile(path);
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const GLchar *source = shaderSource.c_str();
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GLuint result = glCreateShader(shadertype);
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glShaderSource(result, 1, &source, NULL);
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glCompileShader(result);
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GLint success;
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GLchar infoLog[512];
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glGetShaderiv(result, GL_COMPILE_STATUS, &success);
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if (!success)
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{
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glGetShaderInfoLog(result, 512, NULL, infoLog);
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std::cout << "glCompileShader failed: " << infoLog << std::endl;
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}
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return result;
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}
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Shader::Shader(std::string vertexPath, std::string fragmentPath)
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{
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GLuint vertexShader = createShaderFromPath(vertexPath, GL_VERTEX_SHADER);
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GLuint fragmentShader =
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createShaderFromPath(fragmentPath, GL_FRAGMENT_SHADER);
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mProgram = glCreateProgram();
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glAttachShader(mProgram, vertexShader);
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glAttachShader(mProgram, fragmentShader);
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glLinkProgram(mProgram);
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GLint success;
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GLchar infoLog[512];
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glGetProgramiv(mProgram, GL_LINK_STATUS, &success);
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if (!success)
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{
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glGetProgramInfoLog(mProgram, 512, NULL, infoLog);
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std::cout << "glLinkProgram failed: " << infoLog << std::endl;
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}
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glDeleteShader(fragmentShader);
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glDeleteShader(vertexShader);
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}
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Shader::~Shader() {}
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void Shader::use() { glUseProgram(mProgram); }
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}
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