135 lines
3.1 KiB
C++
135 lines
3.1 KiB
C++
#include <glbinding/gl/gl.h>
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#include "shaders.hh"
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using namespace gl;
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ShaderException::ShaderException(std::string const& msg)
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: GLException(glGetError()), _msg(msg)
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{
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}
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Shader::Shader(std::string const& program, GLenum type)
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: _shaderID(glCreateShader(type))
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{
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const char* const arr[] = {program.c_str()};
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glShaderSource(_shaderID, 1, arr, NULL);
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glCompileShader(_shaderID);
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int state;
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glGetShaderiv(_shaderID, GL_COMPILE_STATUS, &state);
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if (state == 0) {
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int logLength;
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glGetShaderiv(_shaderID, GL_INFO_LOG_LENGTH, &logLength);
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char *log = new char[logLength];
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glGetShaderInfoLog(_shaderID, logLength, NULL, log);
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std::string msg(log);
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delete[] log;
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glDeleteShader(_shaderID);
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throw ShaderException(msg);
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}
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}
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Shader::~Shader()
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{
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glDeleteShader(_shaderID);
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}
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Program::Program(VertexShader& vertex, FragmentShader& frag)
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: _geom(nullptr), _vertex(vertex), _frag(frag), _progID(glCreateProgram())
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{
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glAttachShader(_progID, _vertex.getID());
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glAttachShader(_progID, _frag.getID());
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glLinkProgram(_progID);
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int state;
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glGetProgramiv(_progID, GL_LINK_STATUS, &state);
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if (state == 0) {
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int logLength;
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glGetProgramiv(_progID, GL_INFO_LOG_LENGTH, &logLength);
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char *log = new char[logLength];
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glGetProgramInfoLog(_progID, logLength, NULL, log);
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std::string msg(log);
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delete[] log;
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glDeleteProgram(_progID);
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throw ShaderException(msg);
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}
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glDetachShader(_progID, _vertex.getID());
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glDetachShader(_progID, _frag.getID());
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}
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Program::Program(GeometryShader& geom, VertexShader& vertex, FragmentShader& frag)
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: _geom(&geom), _vertex(vertex), _frag(frag), _progID(glCreateProgram())
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{
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glAttachShader(_progID, _geom->getID());
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glAttachShader(_progID, _vertex.getID());
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glAttachShader(_progID, _frag.getID());
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glLinkProgram(_progID);
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int state;
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glGetProgramiv(_progID, GL_LINK_STATUS, &state);
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if (!state) {
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int logLength;
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glGetProgramiv(_progID, GL_INFO_LOG_LENGTH, &logLength);
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char *log = new char[logLength];
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glGetProgramInfoLog(_progID, logLength, NULL, log);
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std::string msg(log);
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delete[] log;
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glDeleteProgram(_progID);
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throw ShaderException(msg);
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}
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glDetachShader(_progID, _geom->getID());
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glDetachShader(_progID, _vertex.getID());
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glDetachShader(_progID, _frag.getID());
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}
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Program::~Program()
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{
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glDeleteProgram(_progID);
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}
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void Program::use() const
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{
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glUseProgram(_progID);
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}
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GLint Program::getUniformLocation(std::string const& name) const
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{
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auto search = _uniformLocCache.find(name);
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if (search != _uniformLocCache.end())
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return search->second;
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GLint ret = glGetUniformLocation(_progID, name.c_str());
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if (ret != -1)
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_uniformLocCache.emplace(name, ret);
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return ret;
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}
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GLint Program::getAttribLocation(std::string const& name) const
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{
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auto search = _attribLocCache.find(name);
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if (search != _attribLocCache.end())
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return search->second;
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GLint ret = glGetAttribLocation(_progID, name.c_str());
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if (ret != -1)
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_attribLocCache.emplace(name, ret);
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return ret;
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}
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