func checkForErrors() error {
err := OpenGLError{make([]gl.Enum, 0)}
for errNumb := gl.GetError(); errNumb != gl.NO_ERROR; {
err.ErrorCodes = append(err.ErrorCodes, errNumb)
if len(err.ErrorCodes) >= 10 {
err.ErrorCodes = append(err.ErrorCodes, 255)
for errNumb := gl.GetError(); errNumb != gl.NO_ERROR; {
}
break
}
}
if len(err.ErrorCodes) == 0 {
return nil
}
return err
}
func reuploadTexture(tex *gl.Uint, w, h int, data []byte) {
if *tex > 0 {
gl.BindTexture(gl.TEXTURE_2D, *tex)
gl.TexImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.Sizei(w), gl.Sizei(h), 0,
gl.RGBA, gl.UNSIGNED_BYTE, gl.Pointer(&data[0]))
if gl.GetError() != gl.NO_ERROR {
gl.DeleteTextures(1, tex)
panic("Failed to reupload texture")
}
return
}
*tex = uploadTexture_RGBA32(w, h, data)
}
func uploadTexture_RGBA32(w, h int, data []byte) gl.Uint {
var id gl.Uint
gl.GenTextures(1, &id)
gl.BindTexture(gl.TEXTURE_2D, id)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_R, gl.CLAMP_TO_EDGE)
gl.TexImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.Sizei(w), gl.Sizei(h), 0, gl.RGBA,
gl.UNSIGNED_BYTE, gl.Pointer(&data[0]))
if gl.GetError() != gl.NO_ERROR {
gl.DeleteTextures(1, &id)
panic("Failed to load a texture")
}
return id
}