Method Texture2D

ZEngine/src/Texture2D.cpp:23–63

namespace ZEngine::Rendering::Textures {

    Texture2D::Texture2D(const char* path) : Texture(path) {
        int width = 0, height = 0, channel = 0;
        stbi_set_flip_vertically_on_load(1);
        stbi_uc* image_data = stbi_load(path, &width, &height, &channel, 0);

        if (image_data != nullptr) {

            m_internal_format = (channel == 3) ? GL_RGB8 : GL_RGBA8;
            m_data_format     = (channel == 3) ? GL_RGB : GL_RGBA;

#ifdef _WIN32
            glCreateTextures(GL_TEXTURE_2D, 1, &m_texture_id);
            glTextureStorage2D(m_texture_id, 1, m_internal_format, width, height);

            glTextureParameterf(m_texture_id, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
            glTextureParameterf(m_texture_id, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

            glTextureParameteri(m_texture_id, GL_TEXTURE_WRAP_S, GL_REPEAT);
            glTextureParameteri(m_texture_id, GL_TEXTURE_WRAP_T, GL_REPEAT);
#else
            glGenTextures(1, &m_texture_id);
            glBindTexture(GL_TEXTURE_2D, m_texture_id);

            glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
            glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
#endif
            m_width  = width;
            m_height = height;

#ifdef _WIN32
            glTextureSubImage2D(m_texture_id, 0, 0, 0, width, height, m_data_format, GL_UNSIGNED_BYTE, (const void*) (image_data));
#else
            glTexImage2D(GL_TEXTURE_2D, 0, m_internal_format, width, height, 0, m_data_format, GL_UNSIGNED_BYTE, (const void*) (image_data));
#endif
        }

        stbi_image_free(image_data);
    }

    Texture2D::Texture2D(unsigned int width, unsigned int height) : Texture(width, height) {
        m_internal_format = GL_RGBA8;