graphicsdriver

Documentation

Index

• Constants
• Variables
• type Address
• type ColorM
• type CompositeMode
  • func (c CompositeMode) Operations() (src Operation, dst Operation)
• type Filter
• type Graphics
• type Image
• type ImageID
• type Operation
• type Region
• type ReplacePixelsArgs
• type Shader
• type ShaderID
• type YDirection

Constants

const (
	InvalidImageID  = 0
	InvalidShaderID = 0
)

Variables

var GraphicsNotReady = errors.New("graphics not ready")

GraphicsNotReady represents that the graphics driver is not ready for recovering from the context lost.

Types

type Address

type Address int

const (
	AddressUnsafe Address = iota
	AddressClampToZero
	AddressRepeat
)

type ColorM

type ColorM interface {
	IsIdentity() bool
	At(i, j int) float32
	Elements(body *[16]float32, translate *[4]float32)
}

type CompositeMode

type CompositeMode int

const (
	CompositeModeUnknown    CompositeMode = iota - 1
	CompositeModeSourceOver               // This value must be 0 (= initial value)
	CompositeModeClear
	CompositeModeCopy
	CompositeModeDestination
	CompositeModeDestinationOver
	CompositeModeSourceIn
	CompositeModeDestinationIn
	CompositeModeSourceOut
	CompositeModeDestinationOut
	CompositeModeSourceAtop
	CompositeModeDestinationAtop
	CompositeModeXor
	CompositeModeLighter
	CompositeModeMultiply

	CompositeModeMax = CompositeModeMultiply
)

func (CompositeMode) Operations

func (c CompositeMode) Operations() (src Operation, dst Operation)

type Filter

type Filter int

const (
	FilterNearest Filter = iota
	FilterLinear
	FilterScreen
)

type Graphics

type Graphics interface {
	Initialize() error
	Begin() error
	End(present bool) error
	SetTransparent(transparent bool)
	SetVertices(vertices []float32, indices []uint16) error
	NewImage(width, height int) (Image, error)
	NewScreenFramebufferImage(width, height int) (Image, error)
	SetVsyncEnabled(enabled bool)
	SetFullscreen(fullscreen bool)
	FramebufferYDirection() YDirection
	NeedsRestoring() bool
	NeedsClearingScreen() bool
	IsGL() bool
	IsDirectX() bool
	MaxImageSize() int

	NewShader(program *shaderir.Program) (Shader, error)

	// DrawTriangles draws an image onto another image with the given parameters.
	DrawTriangles(dst ImageID, srcs [graphics.ShaderImageNum]ImageID, offsets [graphics.ShaderImageNum - 1][2]float32, shader ShaderID, indexLen int, indexOffset int, mode CompositeMode, colorM ColorM, filter Filter, address Address, dstRegion, srcRegion Region, uniforms [][]float32, evenOdd bool) error
}

type Image

type Image interface {
	ID() ImageID
	Dispose()
	IsInvalidated() bool
	ReadPixels(buf []byte) error
	ReplacePixels(args []*ReplacePixelsArgs) error
}

type ImageID

type ImageID int

type Operation

type Operation int

const (
	Zero Operation = iota
	One
	SrcAlpha
	DstAlpha
	OneMinusSrcAlpha
	OneMinusDstAlpha
	DstColor
)

type Region

type Region struct {
	X      float32
	Y      float32
	Width  float32
	Height float32
}

type ReplacePixelsArgs

type ReplacePixelsArgs struct {
	Pixels []byte
	Mask   []byte
	X      int
	Y      int
	Width  int
	Height int
}

type Shader

type Shader interface {
	ID() ShaderID
	Dispose()
}

type ShaderID

type ShaderID int

type YDirection

type YDirection int

const (
	Upward YDirection = iota
	Downward
)