ml
74 lines
2.5 KiB
Go
74 lines
2.5 KiB
Go
package object
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// Bitmap3D describes how a bitmap object should be represented in 3D world.
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type Bitmap3D uint16
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const (
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bitmap3DBitmapNumberLowMask uint16 = 0x03FF
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bitmap3DBitmapNumberHighMask uint16 = 0x8000
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bitmap3DBitmapNumberMask = bitmap3DBitmapNumberLowMask | bitmap3DBitmapNumberHighMask
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bitmap3DAnimationMask uint16 = 0x0400
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bitmap3DRepeatMask uint16 = 0x0800
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bitmap3DFrameNumberMask uint16 = 0x7000
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// Bitmap3DBitmapNumberLimit is the maximum amount of bitmaps.
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Bitmap3DBitmapNumberLimit uint16 = 0x07FF
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// Bitmap3DFrameNumberLimit is the maximum amount of frames.
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Bitmap3DFrameNumberLimit uint16 = 0x0007
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)
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// WithBitmapNumber returns a Bitmap3D with the given value.
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func (bmp Bitmap3D) WithBitmapNumber(value uint16) Bitmap3D {
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bitmapValue := value & bitmap3DBitmapNumberLowMask
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if value >= Bitmap3DBitmapNumberLimit {
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bitmapValue = bitmap3DBitmapNumberMask
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} else if value > bitmap3DBitmapNumberLowMask {
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bitmapValue |= bitmap3DBitmapNumberHighMask
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}
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return Bitmap3D((uint16(bmp) & ^bitmap3DBitmapNumberMask) | bitmapValue)
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}
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// BitmapNumber returns the number of bitmaps.
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func (bmp Bitmap3D) BitmapNumber() uint16 {
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return ((uint16(bmp) & bitmap3DBitmapNumberHighMask) >> 5) | (uint16(bmp) & bitmap3DBitmapNumberLowMask)
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}
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// WithFrameNumber returns a Bitmap3D with the given value.
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func (bmp Bitmap3D) WithFrameNumber(value uint16) Bitmap3D {
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frameValue := (value % (Bitmap3DFrameNumberLimit + 1)) << 12
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return Bitmap3D((uint16(bmp) & ^bitmap3DFrameNumberMask) | frameValue)
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}
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// FrameNumber returns the frame number.
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func (bmp Bitmap3D) FrameNumber() uint16 {
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return (uint16(bmp) & bitmap3DFrameNumberMask) >> 12
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}
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// WithAnimation returns a Bitmap3D with the given value.
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func (bmp Bitmap3D) WithAnimation(value bool) Bitmap3D {
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animationValue := uint16(0)
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if value {
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animationValue = bitmap3DAnimationMask
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}
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return Bitmap3D((uint16(bmp) & ^bitmap3DAnimationMask) | animationValue)
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}
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// Animation returns whether this object is animated.
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func (bmp Bitmap3D) Animation() bool {
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return (uint16(bmp) & bitmap3DAnimationMask) != 0
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}
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// WithRepeat returns a Bitmap3D with the given value.
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func (bmp Bitmap3D) WithRepeat(value bool) Bitmap3D {
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repeatValue := uint16(0)
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if value {
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repeatValue = bitmap3DRepeatMask
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}
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return Bitmap3D((uint16(bmp) & ^bitmap3DRepeatMask) | repeatValue)
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}
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// Repeat returns whether this object repeats its animation.
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func (bmp Bitmap3D) Repeat() bool {
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return (uint16(bmp) & bitmap3DRepeatMask) != 0
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}
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