func LoadTexture(texture gl.Texture, filename string) error {
file, err := os.Open(filename)
if err != nil {
return err
}
defer file.Close()
img, _, err := image.Decode(file)
if err != nil {
return err
}
width, height, format, channelType, pixels := ImageData(img)
gl.BindTexture(gl.TEXTURE_2D, texture)
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.TexImage2D(
gl.TEXTURE_2D, 0, /* target, level of detail */
gl.RGB8, /* internal format */
width, height, 0, /* width, height, border */
format, channelType, /* external format, type */
pixels, /* pixels */
)
return nil
}
func AttachTexture(location gl.UniformLocation, textureEnum gl.Enum, target gl.Enum, texture gl.Texture) {
gl.ActiveTexture(textureEnum)
gl.BindTexture(target, texture)
gl.Uniform1i(location, gl.Int(textureEnum-gl.TEXTURE0))
}