Texture.cpp

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#include "Texture.h"
#define STB_IMAGE_IMPLEMENTATION
#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);
    if (m_LocalBuffer == NULL)
    {
        std::cout << stbi_failure_reason();
    }
    GLCall(glGenTextures(1, &m_RendererID));
    GLCall(glBindTexture(GL_TEXTURE_2D, m_RendererID));
 
    GLCall(glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, m_Width, m_Height, 0, GL_RGBA, GL_UNSIGNED_BYTE, m_LocalBuffer));
    GLCall(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR));
    GLCall(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR));
    GLCall(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE));
    GLCall(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE));
 
    GLCall(glBindTexture(GL_TEXTURE_2D, 0));
 
    if (m_LocalBuffer)
        stbi_image_free(m_LocalBuffer);
    stbi_set_flip_vertically_on_load(0);
}
 
Texture::~Texture()
{
    GLCall(glDeleteTextures(1, &m_RendererID));
}
 
unsigned int Texture::GetRendererID()
{
    return m_RendererID;
}
 
void Texture::SetFilePath(const std::string& path)
{
    m_FilePath = path;
}
 
void Texture::Bind(unsigned int slot /*= 0*/) const
{
 
    GLCall(glActiveTexture(GL_TEXTURE0 + slot));
    GLCall(glBindTexture(GL_TEXTURE_2D, m_RendererID));
}
 
void Texture::Unbind() const
{
    GLCall(glBindTexture(GL_TEXTURE_2D, 0));
}