miri-frr-visibility/ShaderProgram.cpp at master · guillempd/miri-frr-visibility · GitHub

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#include "ShaderProgram.h"
#include <glm/gtc/type_ptr.hpp>

ShaderProgram::ShaderProgram()
{
    programId = 0;
    linked = false;
}

void ShaderProgram::init()
{
    programId = glCreateProgram();
}

void ShaderProgram::addShader(const Shader &shader)
{
    glAttachShader(programId, shader.getId());
}

void ShaderProgram::bindFragmentOutput(const std::string &outputName)
{
    glBindAttribLocation(programId, 0, outputName.c_str());
}

GLint ShaderProgram::bindVertexAttribute(const std::string &attribName, GLint size, GLsizei stride, GLvoid *firstPointer)
{
    GLint attribPos;

    attribPos = glGetAttribLocation(programId, attribName.c_str());
    glVertexAttribPointer(attribPos, size, GL_FLOAT, GL_FALSE, stride, firstPointer);

    return attribPos;
}

void ShaderProgram::link()
{
    GLint status;
    char buffer[512];

    glLinkProgram(programId);
    glGetProgramiv(programId, GL_LINK_STATUS, &status);
    linked = (status == GL_TRUE);
    glGetProgramInfoLog(programId, 512, NULL, buffer);
    errorLog.assign(buffer);
}

void ShaderProgram::free()
{
    glDeleteProgram(programId);
}

void ShaderProgram::use()
{
    glUseProgram(programId);
}

bool ShaderProgram::isLinked()
{
    return linked;
}

const std::string &ShaderProgram::log() const
{
    return errorLog;
}

void ShaderProgram::setUniform1i(const std::string &uniformName, int v)
{
    GLint location = glGetUniformLocation(programId, uniformName.c_str());

    if (location != -1)
        glUniform1i(location, v);
}

void ShaderProgram::setUniform2f(const std::string &uniformName, float v0, float v1)
{
    GLint location = glGetUniformLocation(programId, uniformName.c_str());

    if (location != -1)
        glUniform2f(location, v0, v1);
}

void ShaderProgram::setUniform3f(const std::string &uniformName, float v0, float v1, float v2)
{
    GLint location = glGetUniformLocation(programId, uniformName.c_str());

    if (location != -1)
        glUniform3f(location, v0, v1, v2);
}

void ShaderProgram::setUniform4f(const std::string &uniformName, float v0, float v1, float v2, float v3)
{
    GLint location = glGetUniformLocation(programId, uniformName.c_str());

    if (location != -1)
        glUniform4f(location, v0, v1, v2, v3);
}

void ShaderProgram::setUniformMatrix3f(const std::string &uniformName, const glm::mat3 &mat)
{
    GLint location = glGetUniformLocation(programId, uniformName.c_str());

    if (location != -1)
        glUniformMatrix3fv(location, 1, GL_FALSE, glm::value_ptr(mat));
}

void ShaderProgram::setUniformMatrix4f(const std::string &uniformName, const glm::mat4 &mat)
{
    GLint location = glGetUniformLocation(programId, uniformName.c_str());

    if (location != -1)
        glUniformMatrix4fv(location, 1, GL_FALSE, glm::value_ptr(mat));
}