MCDV/Texture.hpp

   1 #pragma once
   2 #include <string>
   3 #include <iostream>
   4 #include <string>
   5
   6 #include <glad\glad.h>
   7 #include <GLFW\glfw3.h>
   8
   9 #define STB_IMAGE_IMPLEMENTATION
  10 #include "stb_image.h"
  11
  12 class Texture
  13 {
  14 public:
  15         unsigned int texture_id;
  16         Texture(std::string filepath);
  17
  18         void bind();
  19
  20         ~Texture();
  21 };
  22
  23
  24
  25 bool USE_DEBUG2 = false;
  26
  27
  28 Texture::Texture(std::string filepath)
  29 {
  30         //stbi_set_flip_vertically_on_load(true);
  31
  32         glGenTextures(1, &this->texture_id);
  33
  34         //Load texture using stb_image
  35         int width, height, nrChannels;
  36         unsigned char* data = stbi_load(filepath.c_str(), &width, &height, &nrChannels, 0);
  37         if (data)
  38         {
  39                 GLenum format;
  40                 if (nrChannels == 1)
  41                         format = GL_RED;
  42                 else if (nrChannels == 3)
  43                         format = GL_RGB;
  44                 else if (nrChannels == 4)
  45                         format = GL_RGBA;
  46
  47                 glBindTexture(GL_TEXTURE_2D, this->texture_id);
  48                 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, format, GL_UNSIGNED_BYTE, data);
  49                 glGenerateMipmap(GL_TEXTURE_2D);
  50
  51                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
  52                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
  53                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
  54                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
  55
  56                 stbi_image_free(data);
  57
  58                 if (USE_DEBUG2)
  59                 {
  60                         std::cout << "Texture loaded, info:" << std::endl;
  61                         std::cout << filepath << std::endl;
  62                         std::cout << "width: " << width << std::endl;
  63                         std::cout << "height: " << height << std::endl;
  64                 }
  65                 else
  66                 {
  67                         std::cout << "Loading texture: " << filepath << std::endl;
  68                 }
  69         }
  70         else
  71         {
  72                 std::cout << "ERROR::IMAGE::LOAD_FAILED" << std::endl;
  73         }
  74 }
  75
  76 Texture::~Texture()
  77 {
  78 }
  79
  80 void Texture::bind()
  81 {
  82         glBindTexture(GL_TEXTURE_2D, this->texture_id);
  83 }