OpenGL texture from SDL Surface in Go-CodePudding

I'm using go-sdl2 and go-gl and I'm trying to create a gl texture from sdl surface. In C I would do that by calling glTexImage2D with surface->pixels as the last argument. In go-sdl, however, pixels is a private field and Pixels() (that I'm supposed to use to access it) returns []byte, which is incompatible with gl.TexImage2D that expects the last argument to be an unsafe.Pointer.

image, err := img.Load("img.png")
if err != nil {
    //...
}
var texture uint32
gl.GenTextures(1, &texture)
gl.BindTexture(gl.TEXTURE_2D, texture)
gl.TexImage2D(gl.TEXTURE_2D, 0, gl.RGBA, image.W, image.H, 0, gl.RGBA, gl.UNSIGNED_BYTE, image.Pixels())

cannot use image.Pixels() (value of type []byte) as type unsafe.Pointer in argument to gl.TexImage2D

So what would be the proper way of creating gl texture from sdl surface in go?

CodePudding user response：

It turns out that there is Surface.Data function that returns the actual pointer.

gl.TexImage2D(gl.TEXTURE_2D, 0, gl.RGBA, image.W, image.H, 0, gl.RGBA, gl.UNSIGNED_BYTE, image.Data())