terravisor/source/load_texture.cpp

#include "load_texture.h"

#include <iostream>
#include <FreeImage.h>

namespace Texture {
    GLuint LoadTexture(const char* filePath) {
        FIBITMAP* bitmap = FreeImage_Load(FIF_TIFF, filePath, TIFF_DEFAULT);

        if(!bitmap) {
            std::cerr << "Failed to load TIFF image: " << filePath << std::endl;
        }

        FIBITMAP* bitmap32 = FreeImage_ConvertTo32Bits(bitmap);
        FreeImage_Unload(bitmap);

        int width = FreeImage_GetWidth(bitmap32);
        int height = FreeImage_GetHeight(bitmap32);
        BYTE* pixels = FreeImage_GetBits(bitmap32);

        GLuint textureID;
        glGenTextures(1, &textureID);
        glBindTexture(GL_TEXTURE_2D, textureID);

        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_BGRA, GL_UNSIGNED_BYTE, pixels);

        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_REPEAT);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);

        glBindTexture(GL_TEXTURE_2D, 0);

        FreeImage_Unload(bitmap32);

        return textureID;
    }
}