96 lines
2.6 KiB
C++
96 lines
2.6 KiB
C++
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#include "Shader.h"
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#include <fstream>
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#include <sstream>
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#include <iostream>
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Shader::~Shader()
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{
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if (m_ProgramID)
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glDeleteProgram(m_ProgramID);
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}
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bool Shader::Load(const std::string& vertexPath, const std::string& fragmentPath)
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{
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// 1) Create shader objects
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GLuint vertexShader = glCreateShader(GL_VERTEX_SHADER);
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GLuint fragmentShader = glCreateShader(GL_FRAGMENT_SHADER);
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// 2) Load sources
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std::string vertSource = LoadSourceFromFile(vertexPath);
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std::string fragSource = LoadSourceFromFile(fragmentPath);
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if (vertSource.empty() || fragSource.empty())
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{
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std::cerr << "[Shader] Failed to read shader files." << std::endl;
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return false;
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}
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// 3) Compile vertex shader
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{
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const char* src = vertSource.c_str();
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glShaderSource(vertexShader, 1, &src, nullptr);
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glCompileShader(vertexShader);
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if (!CompileShader(vertexShader, vertexPath))
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return false;
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}
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// 4) Compile fragment shader
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{
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const char* src = fragSource.c_str();
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glShaderSource(fragmentShader, 1, &src, nullptr);
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glCompileShader(fragmentShader);
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if (!CompileShader(fragmentShader, fragmentPath))
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return false;
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}
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// 5) Create program and link
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m_ProgramID = glCreateProgram();
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glAttachShader(m_ProgramID, vertexShader);
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glAttachShader(m_ProgramID, fragmentShader);
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glLinkProgram(m_ProgramID);
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// Check link status
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GLint success;
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glGetProgramiv(m_ProgramID, GL_LINK_STATUS, &success);
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if (!success)
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{
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char infoLog[1024];
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glGetProgramInfoLog(m_ProgramID, 1024, nullptr, infoLog);
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std::cerr << "[Shader] Program linking failed:\n" << infoLog << std::endl;
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return false;
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}
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// Cleanup shader objects after linking
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glDeleteShader(vertexShader);
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glDeleteShader(fragmentShader);
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return true;
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}
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bool Shader::CompileShader(GLuint shaderID, const std::string& filePath)
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{
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GLint success;
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glGetShaderiv(shaderID, GL_COMPILE_STATUS, &success);
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if (!success)
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{
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char infoLog[1024];
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glGetShaderInfoLog(shaderID, 1024, nullptr, infoLog);
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std::cerr << "[Shader] Compilation error in " << filePath << ":\n"
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<< infoLog << std::endl;
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return false;
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}
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return true;
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}
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std::string Shader::LoadSourceFromFile(const std::string& filePath)
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{
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std::ifstream file(filePath);
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if (!file.is_open())
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{
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std::cerr << "[Shader] Could not open file: " << filePath << std::endl;
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return "";
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}
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std::stringstream buffer;
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buffer << file.rdbuf();
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return buffer.str();
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}
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