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document pixelgl.Frame

This commit is contained in:
faiface 2017-01-22 01:49:09 +01:00
parent d905c04479
commit 192c455b16
1 changed files with 9 additions and 0 deletions
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9
pixelgl/frame.go
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@ -8,12 +8,14 @@ import (
"github.com/go-gl/gl/v3.3-core/gl" "github.com/go-gl/gl/v3.3-core/gl"
) )
// Frame is a fixed resolution texture that you can draw on.
type Frame struct { type Frame struct {
fb binder fb binder
tex *Texture tex *Texture
width, height int width, height int
} }
// NewFrame creates a new fully transparent Frame with given dimensions.
func NewFrame(width, height int, smooth bool) *Frame { func NewFrame(width, height int, smooth bool) *Frame {
f := &Frame{ f := &Frame{
fb: binder{ fb: binder{
@ -46,22 +48,29 @@ func (f *Frame) delete() {
}) })
} }
// Width returns the width of the Frame in pixels.
func (f *Frame) Width() int { func (f *Frame) Width() int {
return f.width return f.width
} }
// Height returns the height of the Frame in pixels.
func (f *Frame) Height() int { func (f *Frame) Height() int {
return f.height return f.height
} }
// Begin binds the Frame. All draw operations will target this Frame until End is called.
func (f *Frame) Begin() { func (f *Frame) Begin() {
f.fb.bind() f.fb.bind()
} }
// End unbinds the Frame. All draw operations will go to whatever was bound before this Frame.
func (f *Frame) End() { func (f *Frame) End() {
f.fb.restore() f.fb.restore()
} }
// Texture returns the Texture that this Frame draws to. The Texture changes as you use the Frame.
//
// The Texture pointer returned from this method is always the same.
func (f *Frame) Texture() *Texture { func (f *Frame) Texture() *Texture {
return f.tex return f.tex
} }