graphics: Use 1x1 image for empty images

This change leaves some empty images for DrawTriangles.
jgoc · Jul 30, 2019 · fc42af2 · fc42af2
1 parent b210339
commit fc42af2
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Showing 3 changed files with 4 additions and 8 deletions.
diff --git a/ebitenutil/shapes.go b/ebitenutil/shapes.go
@@ -26,7 +26,7 @@ var (
 )
 
 func init() {
-	emptyImage, _ = ebiten.NewImage(16, 16, ebiten.FilterDefault)
+	emptyImage, _ = ebiten.NewImage(1, 1, ebiten.FilterDefault)
 	_ = emptyImage.Fill(color.White)
 }
 

diff --git a/image.go b/image.go
@@ -81,13 +81,8 @@ func (i *Image) Clear() error {
 var emptyImage *Image
 
 func init() {
-	const w, h = 16, 16
-	emptyImage, _ = NewImage(w, h, FilterDefault)
-	pix := make([]byte, 4*w*h)
-	for i := range pix {
-		pix[i] = 0xff
-	}
-	emptyImage.ReplacePixels(pix)
+	emptyImage, _ = NewImage(1, 1, FilterDefault)
+	emptyImage.ReplacePixels([]byte{0xff, 0xff, 0xff, 0xff})
 }
 
 // Fill fills the image with a solid color.

diff --git a/vector/path.go b/vector/path.go
@@ -33,6 +33,7 @@ func init() {
 	for i := range pix {
 		pix[i] = 0xff
 	}
+	// (*Image).Fill uses emptyImage, then Fill cannot be called here.
 	emptyImage.ReplacePixels(pix)
 }