bmp

package

v0.0.0-...-cd2df2e Latest Latest Go to latest Published: Apr 17, 2023 License: AGPL-3.0 Imports: 6 Imported by: 0

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Repository

github.com/OmegaRogue/weylus-desktop

Documentation ¶

Index ¶

Variables
type BGRADecoder
- func NewBGRADecoder() *BGRADecoder
- func (dec *BGRADecoder) Decode(src []byte, dst *NBGRA) (*NBGRA, error)
type Config
- func DecodeConfig(r io.Reader) (Config, error)
type NBGRA
- func NewNBGRA(r image.Rectangle) *NBGRA

Constants ¶

This section is empty.

Variables ¶

View Source

var ErrUnsupported = errors.New("bmp: unsupported BMP image")

ErrUnsupported means that the input BMP image uses a valid but unsupported feature.

Functions ¶

This section is empty.

Types ¶

type BGRADecoder ¶

type BGRADecoder struct {
	// contains filtered or unexported fields
}

BGRADecoder is used to decode an BGRA BMP image of the same size as the one used for construction.

func NewBGRADecoder ¶

func NewBGRADecoder() *BGRADecoder

NewBGRADecoder returns a new BGRADecoder.

func (*BGRADecoder) Decode ¶

func (dec *BGRADecoder) Decode(src []byte, dst *NBGRA) (*NBGRA, error)

Decode reads an BGRA BMP image from r and write it to dst (if not nil). If dst is nil, then a new one is allocated. If topDown is false, the image rows will be read bottom-up.

type Config ¶

type Config struct {
	image.Config
	BPP        int
	TopDown    bool
	AllowAlpha bool
}

Config extends image.Config to add BMP image config.

func DecodeConfig ¶

func DecodeConfig(r io.Reader) (Config, error)

DecodeConfig returns the color model and dimensions of a BMP image without decoding the entire image. Limitation: The file must be 8, 24 or 32 bits per pixel.

type NBGRA ¶

type NBGRA struct {
	Pix    []uint8
	Stride int
	Rect   image.Rectangle
}

NBGRA holds an alpha-premultiplied 32-bit BGRA image.

func NewNBGRA ¶

func NewNBGRA(r image.Rectangle) *NBGRA

NewNBGRA returns a new NBGRA image with the given bounds.

Source Files ¶

View all Source files

bmp.go

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