zntg/allg5/graphics.go

package allg5

// #include <allegro5/allegro.h>
import "C"

// BitmapFlag is extra information provided for creating a bitmap
type BitmapFlag int

const (
  // BitmapFlagLinearScaleDown enables linear scaling when scaling down. Gives better results when combined with BitmapFlagMipMap 
  BitmapFlagLinearScaleDown BitmapFlag = C.ALLEGRO_MIN_LINEAR
  // BitmapFlagLinearScaleUp enables linear scaling when scaling up.
  BitmapFlagLinearScaleUp = C.ALLEGRO_MAG_LINEAR
  // BitmapFlagMipMap enables mipmaps for drawing a scaled down version. Bitmap must square and its sides must be a power of two.
  BitmapFlagMipMap = C.ALLEGRO_MIPMAP
)

// ClearToColor clears the target bitmap to the color
func ClearToColor(c Color) {
  C.al_clear_to_color(c.color)
}

// SetNewBitmapFlags sets the default bitmap flags for a newly created bitmap
func SetNewBitmapFlags(flags BitmapFlag) {
  C.al_set_new_bitmap_flags(C.int(flags))
}