Texture.cpp

#include "Texture.h"
#include "stb_image.h"

Texture::Texture(const std::string &path) : 
m_RendererID(0), m_FilePath(path), 
m_LocalBuffer(nullptr), m_Width(0), m_Height(0), m_BPP(0)
{
    stbi_set_flip_vertically_on_load(1);
    m_LocalBuffer = stbi_load(path.c_str(), &m_Width, &m_Height, &m_BPP, 4);

    glGenTextures(1, &m_RendererID);
    glBindTexture(GL_TEXTURE_2D, m_RendererID);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);

    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, m_Width, m_Height, 0, GL_RGBA, GL_UNSIGNED_BYTE, m_LocalBuffer);
    glBindTexture(GL_TEXTURE_2D, 0);

    if(m_LocalBuffer)
        stbi_image_free(m_LocalBuffer);
}

Texture::~Texture()
{
    glDeleteTextures(1, &m_RendererID);
}

void Texture::Bind(unsigned int slot) const
{
    glActiveTexture(GL_TEXTURE0 + slot);
    glBindTexture(GL_TEXTURE_2D, m_RendererID);
}

void Texture::Unbind() const
{
     glBindTexture(GL_TEXTURE_2D, 0);
}