func loadGraphic(filename string) *sdl.Texture {
var err error
image, err = img.Load(filename)
if err != nil {
fmt.Print("Failed to load PNG: ")
fmt.Println(err)
panic(err)
}
defer image.Free()
var graphic *sdl.Texture
graphic, err = renderer.CreateTextureFromSurface(image)
if err != nil {
fmt.Print("Failed to create texture: ")
fmt.Println(err)
panic(err)
}
return graphic
}
// LoadGraphic loads a graphic from disk or panics trying. The image can be in
// BMP, GIF, JPEG, LBM, PCX, PNG, PNM, TGA, TIFF, WEBP, XCF, XPM, or XV format.
// The user must supply the filename of the graphic file to load, in the
// parameter filename.
//
// If the function succeeds then a variable of type Graphic will be returned
// back to the calling function. It is the programmers responsibility to
// store this in a variable of type Graphic.
//
// If the function fails it will panic and crash the program.
// The reasons for a panic are:
//
// 1. The toolbox has not been initalised
//
// 2. The filename does not exist, or is otherwise inaccessable. The specific
// reason will be contained in the panic message itself. This message will
// be prefixed with "Failed to load file: ".
//
// 3. The file could not be converted into a Graphic type. Again the specific
// reason will be contained in the panic message itself. This message will be
// prefixed with "Failed to create Graphic: "
func LoadGraphic(filename string) Graphic {
if !initialised {
// this stops execution here, so ne need for an else after the if
panic(notInitialisedMessage)
}
var err error
var image *sdl.Surface
image, err = img.Load(filename)
if err != nil {
fmt.Print("Failed to load file: ")
fmt.Println(err)
panic(err)
}
defer image.Free()
var graphic *sdl.Texture
graphic, err = renderer.CreateTextureFromSurface(image)
if err != nil {
fmt.Print("Failed to create Graphic: ")
fmt.Println(err)
panic(err)
}
return Graphic(graphic)
}