graphics

package

v1.6.2 Latest Latest Go to latest Published: Mar 21, 2018 License: Apache-2.0 Imports: 11 Imported by: 0

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Package graphics represents a low layer for graphics using OpenGL.

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const MaxImageSize = defaultViewportSize

MaxImageSize is the maximum of width/height of an image.

This section is empty.

func FlushCommands() error

FlushCommands flushes the command queue.

func QuadVertexSizeInBytes() int

QuadVertexSizeInBytes returns the size in bytes of vertices for a quadrangle.

func ResetGLState() error

ResetGLState resets or initializes the current OpenGL state.

type Filter int

const (
	FilterNone Filter = iota
	FilterNearest
	FilterLinear
)

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

Image represents an image that is implemented with OpenGL.

func NewImage(width, height int, filter Filter) *Image

func NewImageFromImage(img *image.RGBA, width, height int, filter Filter) *Image

func NewScreenFramebufferImage(width, height int, offsetX, offsetY float64) *Image

func (i *Image) Dispose()

func (i *Image) DrawImage(src *Image, vertices []float32, clr *affine.ColorM, mode opengl.CompositeMode)

func (i *Image) Fill(r, g, b, a uint8)

func (i *Image) IsInvalidated() bool

func (i *Image) Pixels() ([]byte, error)

func (i *Image) ReplacePixels(p []byte)

func (i *Image) Size() (int, int)