CTexture::CTexture(const std::string& filename)
: texture(GL_TEXTURE_2D)
{
Log::msg("loading texture from ", filename);
Magick::Image img;
Magick::Blob blob;
img.read(std::string("aersy-res/") + filename);
mHasAlpha = !img.isOpaque();
img.write(&blob, mHasAlpha ? "RGBA" : "RGB");
bind();
const GLenum format = mHasAlpha ? GL_RGBA : GL_RGB;
glTexImage2D(GL_TEXTURE_2D, 0, format, img.columns(), img.rows(), 0, format, GL_UNSIGNED_BYTE, blob.data());
glGenerateMipmap(_target);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
unbind();
}
