mth/ebiten
1
0
Fork 0
mirror of https://github.com/hajimehoshi/ebiten.git synced 2024-12-25 11:18:54 +01:00
Code Issues Packages Projects Releases Wiki Activity

graphics: Replace emptyImage with dummyImage (not initialized)

Browse Source
This commit is contained in:
Hajime Hoshi 2018-04-06 00:49:49 +09:00
parent abdfb3b713
commit 87daa82ad9
2 changed files with 9 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
graphicscontext.go
View File

@ -102,11 +102,12 @@ func (c *graphicsContext) Update(afterFrameUpdate func()) error {
// TODO: This clear is needed only when the screen size is changed.
if c.offsetX > 0 || c.offsetY > 0 {
op := &DrawImageOptions{}
w, h := emptyImage.Size()
w, h := dummyImage.Size()
s := float64(graphics.MaxImageSize())
op.GeoM.Scale(s/float64(w), s/float64(h))
op.ColorM.Scale(0, 0, 0, 0)
op.CompositeMode = CompositeModeCopy
c.screen.DrawImage(emptyImage, op)
c.screen.DrawImage(dummyImage, op)
}
dw, dh := c.screen.Size()

21
image.go
View File

@ -26,20 +26,10 @@ import (
"github.com/hajimehoshi/ebiten/internal/shareable"
)
// emptyImage is an empty image used for filling other images with a uniform color.
// dummyImage is an empty image used for filling other images with a uniform color.
//
// Do not call Fill or Clear on emptyImage or the program causes infinite recursion.
var emptyImage *Image
func init() {
const (
w = 16
h = 16
)
emptyImage = newImageWithoutInit(w, h)
pix := make([]uint8, w*h*4)
_ = emptyImage.ReplacePixels(pix)
}
// Do not call Fill or Clear on dummyImage or the program causes infinite recursion.
var dummyImage = newImageWithoutInit(16, 16)
// Image represents a rectangle set of pixels.
// The pixel format is alpha-premultiplied RGBA.
@ -92,11 +82,12 @@ func (i *Image) Fill(clr color.Color) error {
func (i *Image) fill(r, g, b, a uint8) {
wd, hd := i.Size()
ws, hs := emptyImage.Size()
ws, hs := dummyImage.Size()
sw := float64(wd) / float64(ws)
sh := float64(hd) / float64(hs)
op := &DrawImageOptions{}
op.GeoM.Scale(sw, sh)
op.ColorM.Scale(0, 0, 0, 0)
if a > 0 {
rf := float64(r) / float64(a)
gf := float64(g) / float64(a)
@ -106,7 +97,7 @@ func (i *Image) fill(r, g, b, a uint8) {
}
op.CompositeMode = CompositeModeCopy
op.Filter = FilterNearest
_ = i.DrawImage(emptyImage, op)
_ = i.DrawImage(dummyImage, op)
}
func (i *Image) isDisposed() bool {