internal/graphicsdriver: add FillRule and replace boolean values with this

Updates #2782

image.go

@@ -262,7 +262,7 @@ func (i *Image) DrawImage(img *Image, options *DrawImageOptions) {
 		})
 	}
 
-	i.image.DrawTriangles(srcs, vs, is, blend, i.adjustedBounds(), [graphics.ShaderImageCount]image.Rectangle{img.adjustedBounds()}, shader.shader, i.tmpUniforms, false, canSkipMipmap(geoM, filter), false)
+	i.image.DrawTriangles(srcs, vs, is, blend, i.adjustedBounds(), [graphics.ShaderImageCount]image.Rectangle{img.adjustedBounds()}, shader.shader, i.tmpUniforms, graphicsdriver.FillAll, canSkipMipmap(geoM, filter), false)
 }
 
 // Vertex represents a vertex passed to DrawTriangles.
@@ -312,11 +312,11 @@ type FillRule int
 
 const (
 	// FillAll indicates all the triangles are rendered regardless of overlaps.
-	FillAll FillRule = iota
+	FillAll FillRule = FillRule(graphicsdriver.FillAll)
 
 	// EvenOdd means that triangles are rendered based on the even-odd rule.
 	// If and only if the number of overlaps is odd, the region is rendered.
-	EvenOdd
+	EvenOdd FillRule = FillRule(graphicsdriver.EvenOdd)
 )
 
 // ColorScaleMode is the mode of color scales in vertices.
@@ -511,7 +511,7 @@ func (i *Image) DrawTriangles(vertices []Vertex, indices []uint16, img *Image, o
 		})
 	}
 
-	i.image.DrawTriangles(srcs, vs, is, blend, i.adjustedBounds(), [graphics.ShaderImageCount]image.Rectangle{img.adjustedBounds()}, shader.shader, i.tmpUniforms, options.FillRule == EvenOdd, filter != builtinshader.FilterLinear, options.AntiAlias)
+	i.image.DrawTriangles(srcs, vs, is, blend, i.adjustedBounds(), [graphics.ShaderImageCount]image.Rectangle{img.adjustedBounds()}, shader.shader, i.tmpUniforms, graphicsdriver.FillRule(options.FillRule), filter != builtinshader.FilterLinear, options.AntiAlias)
 }
 
 // DrawTrianglesShaderOptions represents options for DrawTrianglesShader.
@@ -676,7 +676,7 @@ func (i *Image) DrawTrianglesShader(vertices []Vertex, indices []uint16, shader
 	i.tmpUniforms = i.tmpUniforms[:0]
 	i.tmpUniforms = shader.appendUniforms(i.tmpUniforms, options.Uniforms)
 
-	i.image.DrawTriangles(imgs, vs, is, blend, i.adjustedBounds(), srcRegions, shader.shader, i.tmpUniforms, options.FillRule == EvenOdd, true, options.AntiAlias)
+	i.image.DrawTriangles(imgs, vs, is, blend, i.adjustedBounds(), srcRegions, shader.shader, i.tmpUniforms, graphicsdriver.FillRule(options.FillRule), true, options.AntiAlias)
 }
 
 // DrawRectShaderOptions represents options for DrawRectShader.
@@ -806,7 +806,7 @@ func (i *Image) DrawRectShader(width, height int, shader *Shader, options *DrawR
 	i.tmpUniforms = i.tmpUniforms[:0]
 	i.tmpUniforms = shader.appendUniforms(i.tmpUniforms, options.Uniforms)
 
-	i.image.DrawTriangles(imgs, vs, is, blend, i.adjustedBounds(), srcRegions, shader.shader, i.tmpUniforms, false, true, false)
+	i.image.DrawTriangles(imgs, vs, is, blend, i.adjustedBounds(), srcRegions, shader.shader, i.tmpUniforms, graphicsdriver.FillAll, true, false)
 }
 
 // SubImage returns an image representing the portion of the image p visible through r.

internal/atlas/image.go

@@ -251,7 +251,7 @@ func (i *Image) ensureIsolatedFromSource(backends []*backend) {
 	is := graphics.QuadIndices()
 	dr := image.Rect(0, 0, i.width, i.height)
 
-	newI.drawTriangles([graphics.ShaderImageCount]*Image{i}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, NearestFilterShader, nil, false)
+	newI.drawTriangles([graphics.ShaderImageCount]*Image{i}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, NearestFilterShader, nil, graphicsdriver.FillAll)
 	newI.moveTo(i)
 }
 
@@ -281,7 +281,7 @@ func (i *Image) putOnSourceBackend(graphicsDriver graphicsdriver.Graphics) {
 	graphics.QuadVertices(vs, 0, 0, w, h, 1, 0, 0, 1, 0, 0, 1, 1, 1, 1)
 	is := graphics.QuadIndices()
 	dr := image.Rect(0, 0, i.width, i.height)
-	newI.drawTriangles([graphics.ShaderImageCount]*Image{i}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, NearestFilterShader, nil, false)
+	newI.drawTriangles([graphics.ShaderImageCount]*Image{i}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, NearestFilterShader, nil, graphicsdriver.FillAll)
 
 	newI.moveTo(i)
 	i.usedAsSourceCount = 0
@@ -313,7 +313,7 @@ func (i *Image) regionWithPadding() image.Rectangle {
 //	5: Color G
 //	6: Color B
 //	7: Color Y
-func (i *Image) DrawTriangles(srcs [graphics.ShaderImageCount]*Image, vertices []float32, indices []uint32, blend graphicsdriver.Blend, dstRegion image.Rectangle, srcRegions [graphics.ShaderImageCount]image.Rectangle, shader *Shader, uniforms []uint32, evenOdd bool) {
+func (i *Image) DrawTriangles(srcs [graphics.ShaderImageCount]*Image, vertices []float32, indices []uint32, blend graphicsdriver.Blend, dstRegion image.Rectangle, srcRegions [graphics.ShaderImageCount]image.Rectangle, shader *Shader, uniforms []uint32, fillRule graphicsdriver.FillRule) {
 	backendsM.Lock()
 	defer backendsM.Unlock()
 
@@ -326,15 +326,15 @@ func (i *Image) DrawTriangles(srcs [graphics.ShaderImageCount]*Image, vertices [
 		copy(us, uniforms)
 
 		appendDeferred(func() {
-			i.drawTriangles(srcs, vs, is, blend, dstRegion, srcRegions, shader, us, evenOdd)
+			i.drawTriangles(srcs, vs, is, blend, dstRegion, srcRegions, shader, us, fillRule)
 		})
 		return
 	}
 
-	i.drawTriangles(srcs, vertices, indices, blend, dstRegion, srcRegions, shader, uniforms, evenOdd)
+	i.drawTriangles(srcs, vertices, indices, blend, dstRegion, srcRegions, shader, uniforms, fillRule)
 }
 
-func (i *Image) drawTriangles(srcs [graphics.ShaderImageCount]*Image, vertices []float32, indices []uint32, blend graphicsdriver.Blend, dstRegion image.Rectangle, srcRegions [graphics.ShaderImageCount]image.Rectangle, shader *Shader, uniforms []uint32, evenOdd bool) {
+func (i *Image) drawTriangles(srcs [graphics.ShaderImageCount]*Image, vertices []float32, indices []uint32, blend graphicsdriver.Blend, dstRegion image.Rectangle, srcRegions [graphics.ShaderImageCount]image.Rectangle, shader *Shader, uniforms []uint32, fillRule graphicsdriver.FillRule) {
 	backends := make([]*backend, 0, len(srcs))
 	for _, src := range srcs {
 		if src == nil {
@@ -415,7 +415,7 @@ func (i *Image) drawTriangles(srcs [graphics.ShaderImageCount]*Image, vertices [
 		imgs[i] = src.backend.restorable
 	}
 
-	i.backend.restorable.DrawTriangles(imgs, vertices, indices, blend, dstRegion, srcRegions, shader.ensureShader(), uniforms, evenOdd)
+	i.backend.restorable.DrawTriangles(imgs, vertices, indices, blend, dstRegion, srcRegions, shader.ensureShader(), uniforms, fillRule)
 
 	for _, src := range srcs {
 		if src == nil {

internal/atlas/image_test.go

@@ -103,7 +103,7 @@ func TestEnsureIsolatedFromSourceBackend(t *testing.T) {
 	vs := quadVertices(size/2, size/2, size/4, size/4, 1)
 	is := graphics.QuadIndices()
 	dr := image.Rect(0, 0, size, size)
-	img4.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{img3}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, false)
+	img4.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{img3}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, graphicsdriver.FillAll)
 	if got, want := img4.IsOnSourceBackendForTesting(), false; got != want {
 		t.Errorf("got: %v, want: %v", got, want)
 	}
@@ -111,7 +111,7 @@ func TestEnsureIsolatedFromSourceBackend(t *testing.T) {
 	// img5 is not allocated now, but is allocated at DrawTriangles.
 	vs = quadVertices(0, 0, size/2, size/2, 1)
 	dr = image.Rect(0, 0, size/2, size/2)
-	img3.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{img5}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, false)
+	img3.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{img5}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, graphicsdriver.FillAll)
 	if got, want := img3.IsOnSourceBackendForTesting(), false; got != want {
 		t.Errorf("got: %v, want: %v", got, want)
 	}
@@ -141,7 +141,7 @@ func TestEnsureIsolatedFromSourceBackend(t *testing.T) {
 	// Check further drawing doesn't cause panic.
 	// This bug was fixed by 03dcd948.
 	vs = quadVertices(0, 0, size/2, size/2, 1)
-	img4.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{img3}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, false)
+	img4.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{img3}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, graphicsdriver.FillAll)
 }
 
 func TestReputOnSourceBackend(t *testing.T) {
@@ -185,7 +185,7 @@ func TestReputOnSourceBackend(t *testing.T) {
 	// Render onto img1. The count should not matter.
 	for i := 0; i < 5; i++ {
 		vs := quadVertices(size, size, 0, 0, 1)
-		img1.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{img2}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, false)
+		img1.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{img2}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, graphicsdriver.FillAll)
 		if got, want := img1.IsOnSourceBackendForTesting(), false; got != want {
 			t.Errorf("got: %v, want: %v", got, want)
 		}
@@ -197,7 +197,7 @@ func TestReputOnSourceBackend(t *testing.T) {
 	for i := 0; i < atlas.BaseCountToPutOnSourceBackend*2; i++ {
 		atlas.PutImagesOnSourceBackendForTesting(ui.Get().GraphicsDriverForTesting())
 		vs := quadVertices(size, size, 0, 0, 1)
-		img0.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{img1}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, false)
+		img0.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{img1}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, graphicsdriver.FillAll)
 		if got, want := img1.IsOnSourceBackendForTesting(), false; got != want {
 			t.Errorf("got: %v, want: %v", got, want)
 		}
@@ -205,7 +205,7 @@ func TestReputOnSourceBackend(t *testing.T) {
 	// Finally, img1 is on a source backend.
 	atlas.PutImagesOnSourceBackendForTesting(ui.Get().GraphicsDriverForTesting())
 	vs := quadVertices(size, size, 0, 0, 1)
-	img0.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{img1}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, false)
+	img0.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{img1}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, graphicsdriver.FillAll)
 	if got, want := img1.IsOnSourceBackendForTesting(), true; got != want {
 		t.Errorf("got: %v, want: %v", got, want)
 	}
@@ -230,7 +230,7 @@ func TestReputOnSourceBackend(t *testing.T) {
 	}
 
 	vs = quadVertices(size, size, 0, 0, 1)
-	img0.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{img1}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, false)
+	img0.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{img1}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, graphicsdriver.FillAll)
 	if got, want := img1.IsOnSourceBackendForTesting(), true; got != want {
 		t.Errorf("got: %v, want: %v", got, want)
 	}
@@ -256,7 +256,7 @@ func TestReputOnSourceBackend(t *testing.T) {
 	// Use img1 as a render target again. The count should not matter.
 	for i := 0; i < 5; i++ {
 		vs := quadVertices(size, size, 0, 0, 1)
-		img1.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{img2}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, false)
+		img1.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{img2}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, graphicsdriver.FillAll)
 		if got, want := img1.IsOnSourceBackendForTesting(), false; got != want {
 			t.Errorf("got: %v, want: %v", got, want)
 		}
@@ -268,7 +268,7 @@ func TestReputOnSourceBackend(t *testing.T) {
 		atlas.PutImagesOnSourceBackendForTesting(ui.Get().GraphicsDriverForTesting())
 		img1.WritePixels(make([]byte, 4*size*size), image.Rect(0, 0, size, size))
 		vs := quadVertices(size, size, 0, 0, 1)
-		img0.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{img1}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, false)
+		img0.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{img1}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, graphicsdriver.FillAll)
 		if got, want := img1.IsOnSourceBackendForTesting(), false; got != want {
 			t.Errorf("got: %v, want: %v", got, want)
 		}
@@ -277,7 +277,7 @@ func TestReputOnSourceBackend(t *testing.T) {
 
 	// img1 is not on an atlas due to WritePixels.
 	vs = quadVertices(size, size, 0, 0, 1)
-	img0.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{img1}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, false)
+	img0.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{img1}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, graphicsdriver.FillAll)
 	if got, want := img1.IsOnSourceBackendForTesting(), false; got != want {
 		t.Errorf("got: %v, want: %v", got, want)
 	}
@@ -286,7 +286,7 @@ func TestReputOnSourceBackend(t *testing.T) {
 	for i := 0; i < atlas.BaseCountToPutOnSourceBackend*2; i++ {
 		atlas.PutImagesOnSourceBackendForTesting(ui.Get().GraphicsDriverForTesting())
 		vs := quadVertices(size, size, 0, 0, 1)
-		img0.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{img3}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, false)
+		img0.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{img3}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, graphicsdriver.FillAll)
 		if got, want := img3.IsOnSourceBackendForTesting(), false; got != want {
 			t.Errorf("got: %v, want: %v", got, want)
 		}
@@ -381,7 +381,7 @@ func TestWritePixelsAfterDrawTriangles(t *testing.T) {
 	vs := quadVertices(w, h, 0, 0, 1)
 	is := graphics.QuadIndices()
 	dr := image.Rect(0, 0, w, h)
-	dst.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{src}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, false)
+	dst.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{src}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, graphicsdriver.FillAll)
 	dst.WritePixels(pix, image.Rect(0, 0, w, h))
 
 	pix = make([]byte, 4*w*h)
@@ -424,7 +424,7 @@ func TestSmallImages(t *testing.T) {
 	vs := quadVertices(w, h, 0, 0, 1)
 	is := graphics.QuadIndices()
 	dr := image.Rect(0, 0, w, h)
-	dst.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{src}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, false)
+	dst.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{src}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, graphicsdriver.FillAll)
 
 	pix = make([]byte, 4*w*h)
 	if err := dst.ReadPixels(ui.Get().GraphicsDriverForTesting(), pix, image.Rect(0, 0, w, h)); err != nil {
@@ -467,7 +467,7 @@ func TestLongImages(t *testing.T) {
 	vs := quadVertices(w, h, 0, 0, scale)
 	is := graphics.QuadIndices()
 	dr := image.Rect(0, 0, dstW, dstH)
-	dst.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{src}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, false)
+	dst.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{src}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, graphicsdriver.FillAll)
 
 	pix = make([]byte, 4*dstW*dstH)
 	if err := dst.ReadPixels(ui.Get().GraphicsDriverForTesting(), pix, image.Rect(0, 0, dstW, dstH)); err != nil {
@@ -579,7 +579,7 @@ func TestDeallocatedAndReputOnSourceBackend(t *testing.T) {
 	vs := quadVertices(size, size, 0, 0, 1)
 	is := graphics.QuadIndices()
 	dr := image.Rect(0, 0, size, size)
-	src.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{src2}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, false)
+	src.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{src2}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, graphicsdriver.FillAll)
 	if got, want := src.IsOnSourceBackendForTesting(), false; got != want {
 		t.Errorf("got: %v, want: %v", got, want)
 	}
@@ -588,7 +588,7 @@ func TestDeallocatedAndReputOnSourceBackend(t *testing.T) {
 	for i := 0; i < atlas.BaseCountToPutOnSourceBackend/2; i++ {
 		atlas.PutImagesOnSourceBackendForTesting(ui.Get().GraphicsDriverForTesting())
 		vs := quadVertices(size, size, 0, 0, 1)
-		dst.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{src}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, false)
+		dst.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{src}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, graphicsdriver.FillAll)
 		if got, want := src.IsOnSourceBackendForTesting(), false; got != want {
 			t.Errorf("got: %v, want: %v", got, want)
 		}
@@ -622,7 +622,7 @@ func TestImageIsNotReputOnSourceBackendWithoutUsingAsSource(t *testing.T) {
 	// Call DrawTriangles multiple times.
 	// The number of DrawTriangles doesn't matter as long as these are called in one frame.
 	for i := 0; i < 2; i++ {
-		src2.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{src}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, false)
+		src2.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{src}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, graphicsdriver.FillAll)
 	}
 	if got, want := src2.IsOnSourceBackendForTesting(), false; got != want {
 		t.Errorf("got: %v, want: %v", got, want)
@@ -641,7 +641,7 @@ func TestImageIsNotReputOnSourceBackendWithoutUsingAsSource(t *testing.T) {
 	for i := 0; i < atlas.BaseCountToPutOnSourceBackend; i++ {
 		atlas.PutImagesOnSourceBackendForTesting(ui.Get().GraphicsDriverForTesting())
 		vs := quadVertices(size, size, 0, 0, 1)
-		dst.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{src2}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, false)
+		dst.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{src2}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, graphicsdriver.FillAll)
 		if got, want := src2.IsOnSourceBackendForTesting(), false; got != want {
 			t.Errorf("got: %v, want: %v", got, want)
 		}
@@ -763,14 +763,14 @@ func TestDestinationCountOverflow(t *testing.T) {
 
 	// Use dst0 as a destination for a while.
 	for i := 0; i < 31; i++ {
-		dst0.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{src}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, false)
+		dst0.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{src}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, graphicsdriver.FillAll)
 		atlas.PutImagesOnSourceBackendForTesting(ui.Get().GraphicsDriverForTesting())
 	}
 
 	// Use dst0 as a source for a while.
 	// As dst0 is used as a destination too many times (31 is a maximum), dst0's backend should never be a source backend.
 	for i := 0; i < 100; i++ {
-		dst1.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{dst0}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, false)
+		dst1.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{dst0}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, graphicsdriver.FillAll)
 		atlas.PutImagesOnSourceBackendForTesting(ui.Get().GraphicsDriverForTesting())
 		if dst0.IsOnSourceBackendForTesting() {
 			t.Errorf("dst0 cannot be on a source backend: %d", i)
@@ -796,7 +796,7 @@ func TestIteratingImagesToPutOnSourceBackend(t *testing.T) {
 	is := graphics.QuadIndices()
 	dr := image.Rect(0, 0, w, h)
 	for _, img := range srcs {
-		img.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{src}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, false)
+		img.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{src}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, graphicsdriver.FillAll)
 	}
 	atlas.PutImagesOnSourceBackendForTesting(ui.Get().GraphicsDriverForTesting())
 
@@ -804,7 +804,7 @@ func TestIteratingImagesToPutOnSourceBackend(t *testing.T) {
 	// Check iterating the registered image works correctly.
 	for i := 0; i < 100; i++ {
 		for _, src := range srcs {
-			dst.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{src}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, false)
+			dst.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{src}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, graphicsdriver.FillAll)
 		}
 		atlas.PutImagesOnSourceBackendForTesting(ui.Get().GraphicsDriverForTesting())
 	}

internal/atlas/shader_test.go

@@ -36,12 +36,12 @@ func TestShaderFillTwice(t *testing.T) {
 	dr := image.Rect(0, 0, w, h)
 	g := ui.Get().GraphicsDriverForTesting()
 	s0 := atlas.NewShader(etesting.ShaderProgramFill(0xff, 0xff, 0xff, 0xff))
-	dst.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, s0, nil, false)
+	dst.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, s0, nil, graphicsdriver.FillAll)
 
 	// Vertices must be recreated (#1755)
 	vs = quadVertices(w, h, 0, 0, 1)
 	s1 := atlas.NewShader(etesting.ShaderProgramFill(0x80, 0x80, 0x80, 0xff))
-	dst.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, s1, nil, false)
+	dst.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, s1, nil, graphicsdriver.FillAll)
 
 	pix := make([]byte, 4*w*h)
 	if err := dst.ReadPixels(g, pix, image.Rect(0, 0, w, h)); err != nil {
@@ -64,11 +64,11 @@ func TestImageDrawTwice(t *testing.T) {
 	vs := quadVertices(w, h, 0, 0, 1)
 	is := graphics.QuadIndices()
 	dr := image.Rect(0, 0, w, h)
-	dst.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{src0}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, false)
+	dst.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{src0}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, graphicsdriver.FillAll)
 
 	// Vertices must be recreated (#1755)
 	vs = quadVertices(w, h, 0, 0, 1)
-	dst.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{src1}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, false)
+	dst.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{src1}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, atlas.NearestFilterShader, nil, graphicsdriver.FillAll)
 
 	pix := make([]byte, 4*w*h)
 	if err := dst.ReadPixels(ui.Get().GraphicsDriverForTesting(), pix, image.Rect(0, 0, w, h)); err != nil {

internal/buffered/image.go

@@ -92,7 +92,7 @@ func (i *Image) WritePixels(pix []byte, region image.Rectangle) {
 // DrawTriangles draws the src image with the given vertices.
 //
 // Copying vertices and indices is the caller's responsibility.
-func (i *Image) DrawTriangles(srcs [graphics.ShaderImageCount]*Image, vertices []float32, indices []uint32, blend graphicsdriver.Blend, dstRegion image.Rectangle, srcRegions [graphics.ShaderImageCount]image.Rectangle, shader *atlas.Shader, uniforms []uint32, evenOdd bool) {
+func (i *Image) DrawTriangles(srcs [graphics.ShaderImageCount]*Image, vertices []float32, indices []uint32, blend graphicsdriver.Blend, dstRegion image.Rectangle, srcRegions [graphics.ShaderImageCount]image.Rectangle, shader *atlas.Shader, uniforms []uint32, fillRule graphicsdriver.FillRule) {
 	for _, src := range srcs {
 		if i == src {
 			panic("buffered: Image.DrawTriangles: source images must be different from the receiver")
@@ -108,5 +108,5 @@ func (i *Image) DrawTriangles(srcs [graphics.ShaderImageCount]*Image, vertices [
 		imgs[i] = img.img
 	}
 
-	i.img.DrawTriangles(imgs, vertices, indices, blend, dstRegion, srcRegions, shader, uniforms, evenOdd)
+	i.img.DrawTriangles(imgs, vertices, indices, blend, dstRegion, srcRegions, shader, uniforms, fillRule)
 }

internal/graphicscommand/command.go

@@ -68,7 +68,7 @@ type drawTrianglesCommand struct {
 	dstRegions []graphicsdriver.DstRegion
 	shader     *Shader
 	uniforms   []uint32
-	evenOdd    bool
+	fillRule   graphicsdriver.FillRule
 }
 
 func (c *drawTrianglesCommand) String() string {
@@ -98,7 +98,7 @@ func (c *drawTrianglesCommand) String() string {
 		}
 	}
 
-	return fmt.Sprintf("draw-triangles: dst: %s <- src: [%s], num of dst regions: %d, num of indices: %d, blend: %s, even-odd: %t", dst, strings.Join(srcstrs[:], ", "), len(c.dstRegions), c.numIndices(), blend, c.evenOdd)
+	return fmt.Sprintf("draw-triangles: dst: %s <- src: [%s], num of dst regions: %d, num of indices: %d, blend: %s, fill rule: %s", dst, strings.Join(srcstrs[:], ", "), len(c.dstRegions), c.numIndices(), blend, c.fillRule)
 }
 
 // Exec executes the drawTrianglesCommand.
@@ -117,7 +117,7 @@ func (c *drawTrianglesCommand) Exec(commandQueue *commandQueue, graphicsDriver g
 		imgs[i] = src.image.ID()
 	}
 
-	return graphicsDriver.DrawTriangles(c.dst.image.ID(), imgs, c.shader.shader.ID(), c.dstRegions, indexOffset, c.blend, c.uniforms, c.evenOdd)
+	return graphicsDriver.DrawTriangles(c.dst.image.ID(), imgs, c.shader.shader.ID(), c.dstRegions, indexOffset, c.blend, c.uniforms, c.fillRule)
 }
 
 func (c *drawTrianglesCommand) NeedsSync() bool {
@@ -142,7 +142,7 @@ func (c *drawTrianglesCommand) setVertices(vertices []float32) {
 
 // CanMergeWithDrawTrianglesCommand returns a boolean value indicating whether the other drawTrianglesCommand can be merged
 // with the drawTrianglesCommand c.
-func (c *drawTrianglesCommand) CanMergeWithDrawTrianglesCommand(dst *Image, srcs [graphics.ShaderImageCount]*Image, vertices []float32, blend graphicsdriver.Blend, shader *Shader, uniforms []uint32, evenOdd bool) bool {
+func (c *drawTrianglesCommand) CanMergeWithDrawTrianglesCommand(dst *Image, srcs [graphics.ShaderImageCount]*Image, vertices []float32, blend graphicsdriver.Blend, shader *Shader, uniforms []uint32, fillRule graphicsdriver.FillRule) bool {
 	if c.shader != shader {
 		return false
 	}
@@ -163,10 +163,10 @@ func (c *drawTrianglesCommand) CanMergeWithDrawTrianglesCommand(dst *Image, srcs
 	if c.blend != blend {
 		return false
 	}
-	if c.evenOdd != evenOdd {
+	if c.fillRule != fillRule {
 		return false
 	}
-	if c.evenOdd && mightOverlapDstRegions(c.vertices, vertices) {
+	if c.fillRule == graphicsdriver.EvenOdd && mightOverlapDstRegions(c.vertices, vertices) {
 		return false
 	}
 	return true

internal/graphicscommand/commandqueue.go

@@ -101,7 +101,7 @@ func mustUseDifferentVertexBuffer(nextNumVertexFloats int) bool {
 }
 
 // EnqueueDrawTrianglesCommand enqueues a drawing-image command.
-func (q *commandQueue) EnqueueDrawTrianglesCommand(dst *Image, srcs [graphics.ShaderImageCount]*Image, vertices []float32, indices []uint32, blend graphicsdriver.Blend, dstRegion image.Rectangle, srcRegions [graphics.ShaderImageCount]image.Rectangle, shader *Shader, uniforms []uint32, evenOdd bool) {
+func (q *commandQueue) EnqueueDrawTrianglesCommand(dst *Image, srcs [graphics.ShaderImageCount]*Image, vertices []float32, indices []uint32, blend graphicsdriver.Blend, dstRegion image.Rectangle, srcRegions [graphics.ShaderImageCount]image.Rectangle, shader *Shader, uniforms []uint32, fillRule graphicsdriver.FillRule) {
 	if len(vertices) > maxVertexFloatCount {
 		panic(fmt.Sprintf("graphicscommand: len(vertices) must equal to or less than %d but was %d", maxVertexFloatCount, len(vertices)))
 	}
@@ -129,7 +129,7 @@ func (q *commandQueue) EnqueueDrawTrianglesCommand(dst *Image, srcs [graphics.Sh
 	// TODO: If dst is the screen, reorder the command to be the last.
 	if !split && 0 < len(q.commands) {
 		if last, ok := q.commands[len(q.commands)-1].(*drawTrianglesCommand); ok {
-			if last.CanMergeWithDrawTrianglesCommand(dst, srcs, vertices, blend, shader, uniforms, evenOdd) {
+			if last.CanMergeWithDrawTrianglesCommand(dst, srcs, vertices, blend, shader, uniforms, fillRule) {
 				last.setVertices(q.lastVertices(len(vertices) + last.numVertices()))
 				if last.dstRegions[len(last.dstRegions)-1].Region == dstRegion {
 					last.dstRegions[len(last.dstRegions)-1].IndexCount += len(indices)
@@ -157,7 +157,7 @@ func (q *commandQueue) EnqueueDrawTrianglesCommand(dst *Image, srcs [graphics.Sh
 	}
 	c.shader = shader
 	c.uniforms = uniforms
-	c.evenOdd = evenOdd
+	c.fillRule = fillRule
 	q.commands = append(q.commands, c)
 }
 
@@ -493,11 +493,11 @@ func (c *commandQueueManager) putCommandQueue(commandQueue *commandQueue) {
 	c.pool.put(commandQueue)
 }
 
-func (c *commandQueueManager) enqueueDrawTrianglesCommand(dst *Image, srcs [graphics.ShaderImageCount]*Image, vertices []float32, indices []uint32, blend graphicsdriver.Blend, dstRegion image.Rectangle, srcRegions [graphics.ShaderImageCount]image.Rectangle, shader *Shader, uniforms []uint32, evenOdd bool) {
+func (c *commandQueueManager) enqueueDrawTrianglesCommand(dst *Image, srcs [graphics.ShaderImageCount]*Image, vertices []float32, indices []uint32, blend graphicsdriver.Blend, dstRegion image.Rectangle, srcRegions [graphics.ShaderImageCount]image.Rectangle, shader *Shader, uniforms []uint32, fillRule graphicsdriver.FillRule) {
 	if c.current == nil {
 		c.current, _ = c.pool.get()
 	}
-	c.current.EnqueueDrawTrianglesCommand(dst, srcs, vertices, indices, blend, dstRegion, srcRegions, shader, uniforms, evenOdd)
+	c.current.EnqueueDrawTrianglesCommand(dst, srcs, vertices, indices, blend, dstRegion, srcRegions, shader, uniforms, fillRule)
 }
 
 func (c *commandQueueManager) flush(graphicsDriver graphicsdriver.Graphics, endFrame bool, swapBuffersForGL func()) error {

internal/graphicscommand/image.go

@@ -130,7 +130,7 @@ func (i *Image) InternalSize() (int, int) {
 //
 // If the source image is not specified, i.e., src is nil and there is no image in the uniform variables, the
 // elements for the source image are not used.
-func (i *Image) DrawTriangles(srcs [graphics.ShaderImageCount]*Image, vertices []float32, indices []uint32, blend graphicsdriver.Blend, dstRegion image.Rectangle, srcRegions [graphics.ShaderImageCount]image.Rectangle, shader *Shader, uniforms []uint32, evenOdd bool) {
+func (i *Image) DrawTriangles(srcs [graphics.ShaderImageCount]*Image, vertices []float32, indices []uint32, blend graphicsdriver.Blend, dstRegion image.Rectangle, srcRegions [graphics.ShaderImageCount]image.Rectangle, shader *Shader, uniforms []uint32, fillRule graphicsdriver.FillRule) {
 	for _, src := range srcs {
 		if src == nil {
 			continue
@@ -142,7 +142,7 @@ func (i *Image) DrawTriangles(srcs [graphics.ShaderImageCount]*Image, vertices [
 	}
 	i.flushBufferedWritePixels()
 
-	theCommandQueueManager.enqueueDrawTrianglesCommand(i, srcs, vertices, indices, blend, dstRegion, srcRegions, shader, uniforms, evenOdd)
+	theCommandQueueManager.enqueueDrawTrianglesCommand(i, srcs, vertices, indices, blend, dstRegion, srcRegions, shader, uniforms, fillRule)
 }
 
 // ReadPixels reads the image's pixels.

internal/graphicscommand/image_test.go

@@ -59,7 +59,7 @@ func TestClear(t *testing.T) {
 	vs := quadVertices(w/2, h/2)
 	is := graphics.QuadIndices()
 	dr := image.Rect(0, 0, w, h)
-	dst.DrawTriangles([graphics.ShaderImageCount]*graphicscommand.Image{src}, vs, is, graphicsdriver.BlendClear, dr, [graphics.ShaderImageCount]image.Rectangle{}, nearestFilterShader, nil, false)
+	dst.DrawTriangles([graphics.ShaderImageCount]*graphicscommand.Image{src}, vs, is, graphicsdriver.BlendClear, dr, [graphics.ShaderImageCount]image.Rectangle{}, nearestFilterShader, nil, graphicsdriver.FillAll)
 
 	pix := make([]byte, 4*w*h)
 	if err := dst.ReadPixels(ui.Get().GraphicsDriverForTesting(), []graphicsdriver.PixelsArgs{
@@ -90,8 +90,8 @@ func TestWritePixelsPartAfterDrawTriangles(t *testing.T) {
 	vs := quadVertices(w/2, h/2)
 	is := graphics.QuadIndices()
 	dr := image.Rect(0, 0, w, h)
-	dst.DrawTriangles([graphics.ShaderImageCount]*graphicscommand.Image{clr}, vs, is, graphicsdriver.BlendClear, dr, [graphics.ShaderImageCount]image.Rectangle{}, nearestFilterShader, nil, false)
+	dst.DrawTriangles([graphics.ShaderImageCount]*graphicscommand.Image{clr}, vs, is, graphicsdriver.BlendClear, dr, [graphics.ShaderImageCount]image.Rectangle{}, nearestFilterShader, nil, graphicsdriver.FillAll)
-	dst.DrawTriangles([graphics.ShaderImageCount]*graphicscommand.Image{src}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, nearestFilterShader, nil, false)
+	dst.DrawTriangles([graphics.ShaderImageCount]*graphicscommand.Image{src}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, nearestFilterShader, nil, graphicsdriver.FillAll)
 	bs := graphics.NewManagedBytes(4, func(bs []byte) {
 		for i := range bs {
 			bs[i] = 0
@@ -109,11 +109,11 @@ func TestShader(t *testing.T) {
 	vs := quadVertices(w, h)
 	is := graphics.QuadIndices()
 	dr := image.Rect(0, 0, w, h)
-	dst.DrawTriangles([graphics.ShaderImageCount]*graphicscommand.Image{clr}, vs, is, graphicsdriver.BlendClear, dr, [graphics.ShaderImageCount]image.Rectangle{}, nearestFilterShader, nil, false)
+	dst.DrawTriangles([graphics.ShaderImageCount]*graphicscommand.Image{clr}, vs, is, graphicsdriver.BlendClear, dr, [graphics.ShaderImageCount]image.Rectangle{}, nearestFilterShader, nil, graphicsdriver.FillAll)
 
 	g := ui.Get().GraphicsDriverForTesting()
 	s := graphicscommand.NewShader(etesting.ShaderProgramFill(0xff, 0, 0, 0xff))
-	dst.DrawTriangles([graphics.ShaderImageCount]*graphicscommand.Image{}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, s, nil, false)
+	dst.DrawTriangles([graphics.ShaderImageCount]*graphicscommand.Image{}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, s, nil, graphicsdriver.FillAll)
 
 	pix := make([]byte, 4*w*h)
 	if err := dst.ReadPixels(g, []graphicsdriver.PixelsArgs{

internal/graphicsdriver/graphics.go

@@ -15,6 +15,7 @@
 package graphicsdriver
 
 import (
+	"fmt"
 	"image"
 
 	"github.com/hajimehoshi/ebiten/v2/internal/graphics"
@@ -26,6 +27,24 @@ type DstRegion struct {
 	IndexCount int
 }
 
+type FillRule int
+
+const (
+	FillAll FillRule = iota
+	EvenOdd
+)
+
+func (f FillRule) String() string {
+	switch f {
+	case FillAll:
+		return "FillAll"
+	case EvenOdd:
+		return "EvenOdd"
+	default:
+		return fmt.Sprintf("FillRule(%d)", f)
+	}
+}
+
 const (
 	InvalidImageID  = 0
 	InvalidShaderID = 0
@@ -47,7 +66,7 @@ type Graphics interface {
 	NewShader(program *shaderir.Program) (Shader, error)
 
 	// DrawTriangles draws an image onto another image with the given parameters.
-	DrawTriangles(dst ImageID, srcs [graphics.ShaderImageCount]ImageID, shader ShaderID, dstRegions []DstRegion, indexOffset int, blend Blend, uniforms []uint32, evenOdd bool) error
+	DrawTriangles(dst ImageID, srcs [graphics.ShaderImageCount]ImageID, shader ShaderID, dstRegions []DstRegion, indexOffset int, blend Blend, uniforms []uint32, fillRule FillRule) error
 }
 
 type Resetter interface {

internal/graphicsdriver/metal/graphics_darwin.go

@@ -46,8 +46,8 @@ type Graphics struct {
 	buffers       map[mtl.CommandBuffer][]mtl.Buffer
 	unusedBuffers map[mtl.Buffer]struct{}
 
-	lastDst     *Image
+	lastDst      *Image
-	lastEvenOdd bool
+	lastFillRule graphicsdriver.FillRule
 
 	vb mtl.Buffer
 	ib mtl.Buffer
@@ -468,15 +468,15 @@ func (g *Graphics) flushRenderCommandEncoderIfNeeded() {
 	g.lastDst = nil
 }
 
-func (g *Graphics) draw(dst *Image, dstRegions []graphicsdriver.DstRegion, srcs [graphics.ShaderImageCount]*Image, indexOffset int, shader *Shader, uniforms [][]uint32, blend graphicsdriver.Blend, evenOdd bool) error {
+func (g *Graphics) draw(dst *Image, dstRegions []graphicsdriver.DstRegion, srcs [graphics.ShaderImageCount]*Image, indexOffset int, shader *Shader, uniforms [][]uint32, blend graphicsdriver.Blend, fillRule graphicsdriver.FillRule) error {
 	// When preparing a stencil buffer, flush the current render command encoder
 	// to make sure the stencil buffer is cleared when loading.
 	// TODO: What about clearing the stencil buffer by vertices?
-	if g.lastDst != dst || g.lastEvenOdd != evenOdd || evenOdd {
+	if g.lastDst != dst || g.lastFillRule != fillRule || fillRule == graphicsdriver.EvenOdd {
 		g.flushRenderCommandEncoderIfNeeded()
 	}
 	g.lastDst = dst
-	g.lastEvenOdd = evenOdd
+	g.lastFillRule = fillRule
 
 	if g.rce == (mtl.RenderCommandEncoder{}) {
 		rpd := mtl.RenderPassDescriptor{}
@@ -498,7 +498,7 @@ func (g *Graphics) draw(dst *Image, dstRegions []graphicsdriver.DstRegion, srcs
 		rpd.ColorAttachments[0].Texture = t
 		rpd.ColorAttachments[0].ClearColor = mtl.ClearColor{}
 
-		if evenOdd {
+		if fillRule == graphicsdriver.EvenOdd {
 			dst.ensureStencil()
 			rpd.StencilAttachment.LoadAction = mtl.LoadActionClear
 			rpd.StencilAttachment.StoreAction = mtl.StoreActionDontCare
@@ -543,7 +543,14 @@ func (g *Graphics) draw(dst *Image, dstRegions []graphicsdriver.DstRegion, srcs
 		drawWithStencilRpss mtl.RenderPipelineState
 		noStencilRpss       mtl.RenderPipelineState
 	)
-	if evenOdd {
+	switch fillRule {
+	case graphicsdriver.FillAll:
+		s, err := shader.RenderPipelineState(&g.view, blend, noStencil, dst.screen)
+		if err != nil {
+			return err
+		}
+		noStencilRpss = s
+	case graphicsdriver.EvenOdd:
 		s, err := shader.RenderPipelineState(&g.view, blend, prepareStencil, dst.screen)
 		if err != nil {
 			return err
@@ -555,12 +562,6 @@ func (g *Graphics) draw(dst *Image, dstRegions []graphicsdriver.DstRegion, srcs
 			return err
 		}
 		drawWithStencilRpss = s
-	} else {
-		s, err := shader.RenderPipelineState(&g.view, blend, noStencil, dst.screen)
-		if err != nil {
-			return err
-		}
-		noStencilRpss = s
 	}
 
 	for _, dstRegion := range dstRegions {
@@ -571,7 +572,12 @@ func (g *Graphics) draw(dst *Image, dstRegions []graphicsdriver.DstRegion, srcs
 			Height: dstRegion.Region.Dy(),
 		})
 
-		if evenOdd {
+		switch fillRule {
+		case graphicsdriver.FillAll:
+			g.rce.SetDepthStencilState(g.dsss[noStencil])
+			g.rce.SetRenderPipelineState(noStencilRpss)
+			g.rce.DrawIndexedPrimitives(mtl.PrimitiveTypeTriangle, dstRegion.IndexCount, mtl.IndexTypeUInt32, g.ib, indexOffset*int(unsafe.Sizeof(uint32(0))))
+		case graphicsdriver.EvenOdd:
 			g.rce.SetDepthStencilState(g.dsss[prepareStencil])
 			g.rce.SetRenderPipelineState(prepareStencilRpss)
 			g.rce.DrawIndexedPrimitives(mtl.PrimitiveTypeTriangle, dstRegion.IndexCount, mtl.IndexTypeUInt32, g.ib, indexOffset*int(unsafe.Sizeof(uint32(0))))
@@ -579,10 +585,6 @@ func (g *Graphics) draw(dst *Image, dstRegions []graphicsdriver.DstRegion, srcs
 			g.rce.SetDepthStencilState(g.dsss[drawWithStencil])
 			g.rce.SetRenderPipelineState(drawWithStencilRpss)
 			g.rce.DrawIndexedPrimitives(mtl.PrimitiveTypeTriangle, dstRegion.IndexCount, mtl.IndexTypeUInt32, g.ib, indexOffset*int(unsafe.Sizeof(uint32(0))))
-		} else {
-			g.rce.SetDepthStencilState(g.dsss[noStencil])
-			g.rce.SetRenderPipelineState(noStencilRpss)
-			g.rce.DrawIndexedPrimitives(mtl.PrimitiveTypeTriangle, dstRegion.IndexCount, mtl.IndexTypeUInt32, g.ib, indexOffset*int(unsafe.Sizeof(uint32(0))))
 		}
 
 		indexOffset += dstRegion.IndexCount
@@ -591,7 +593,7 @@ func (g *Graphics) draw(dst *Image, dstRegions []graphicsdriver.DstRegion, srcs
 	return nil
 }
 
-func (g *Graphics) DrawTriangles(dstID graphicsdriver.ImageID, srcIDs [graphics.ShaderImageCount]graphicsdriver.ImageID, shaderID graphicsdriver.ShaderID, dstRegions []graphicsdriver.DstRegion, indexOffset int, blend graphicsdriver.Blend, uniforms []uint32, evenOdd bool) error {
+func (g *Graphics) DrawTriangles(dstID graphicsdriver.ImageID, srcIDs [graphics.ShaderImageCount]graphicsdriver.ImageID, shaderID graphicsdriver.ShaderID, dstRegions []graphicsdriver.DstRegion, indexOffset int, blend graphicsdriver.Blend, uniforms []uint32, fillRule graphicsdriver.FillRule) error {
 	if shaderID == graphicsdriver.InvalidShaderID {
 		return fmt.Errorf("metal: shader ID is invalid")
 	}
@@ -667,7 +669,7 @@ func (g *Graphics) DrawTriangles(dstID graphicsdriver.ImageID, srcIDs [graphics.
 		idx += n
 	}
 
-	if err := g.draw(dst, dstRegions, srcs, indexOffset, g.shaders[shaderID], uniformVars, blend, evenOdd); err != nil {
+	if err := g.draw(dst, dstRegions, srcs, indexOffset, g.shaders[shaderID], uniformVars, blend, fillRule); err != nil {
 		return err
 	}
 

internal/graphicsdriver/opengl/graphics.go

@@ -182,7 +182,7 @@ func (g *Graphics) uniformVariableName(idx int) string {
 	return name
 }
 
-func (g *Graphics) DrawTriangles(dstID graphicsdriver.ImageID, srcIDs [graphics.ShaderImageCount]graphicsdriver.ImageID, shaderID graphicsdriver.ShaderID, dstRegions []graphicsdriver.DstRegion, indexOffset int, blend graphicsdriver.Blend, uniforms []uint32, evenOdd bool) error {
+func (g *Graphics) DrawTriangles(dstID graphicsdriver.ImageID, srcIDs [graphics.ShaderImageCount]graphicsdriver.ImageID, shaderID graphicsdriver.ShaderID, dstRegions []graphicsdriver.DstRegion, indexOffset int, blend graphicsdriver.Blend, uniforms []uint32, fillRule graphicsdriver.FillRule) error {
 	if shaderID == graphicsdriver.InvalidShaderID {
 		return fmt.Errorf("opengl: shader ID is invalid")
 	}
@@ -243,7 +243,7 @@ func (g *Graphics) DrawTriangles(dstID graphicsdriver.ImageID, srcIDs [graphics.
 	}
 	g.uniformVars = g.uniformVars[:0]
 
-	if evenOdd {
+	if fillRule == graphicsdriver.EvenOdd {
 		if err := destination.ensureStencilBuffer(); err != nil {
 			return err
 		}
@@ -257,7 +257,7 @@ func (g *Graphics) DrawTriangles(dstID graphicsdriver.ImageID, srcIDs [graphics.
 			int32(dstRegion.Region.Dx()),
 			int32(dstRegion.Region.Dy()),
 		)
-		if evenOdd {
+		if fillRule == graphicsdriver.EvenOdd {
 			g.context.ctx.Clear(gl.STENCIL_BUFFER_BIT)
 			g.context.ctx.StencilFunc(gl.ALWAYS, 0x00, 0xff)
 			g.context.ctx.StencilOp(gl.KEEP, gl.KEEP, gl.INVERT)
@@ -273,7 +273,7 @@ func (g *Graphics) DrawTriangles(dstID graphicsdriver.ImageID, srcIDs [graphics.
 		indexOffset += dstRegion.IndexCount
 	}
 
-	if evenOdd {
+	if fillRule == graphicsdriver.EvenOdd {
 		g.context.ctx.Disable(gl.STENCIL_TEST)
 	}
 

internal/mipmap/mipmap.go

@@ -65,7 +65,7 @@ func (m *Mipmap) ReadPixels(graphicsDriver graphicsdriver.Graphics, pixels []byt
 	return m.orig.ReadPixels(graphicsDriver, pixels, region)
 }
 
-func (m *Mipmap) DrawTriangles(srcs [graphics.ShaderImageCount]*Mipmap, vertices []float32, indices []uint32, blend graphicsdriver.Blend, dstRegion image.Rectangle, srcRegions [graphics.ShaderImageCount]image.Rectangle, shader *atlas.Shader, uniforms []uint32, evenOdd bool, canSkipMipmap bool) {
+func (m *Mipmap) DrawTriangles(srcs [graphics.ShaderImageCount]*Mipmap, vertices []float32, indices []uint32, blend graphicsdriver.Blend, dstRegion image.Rectangle, srcRegions [graphics.ShaderImageCount]image.Rectangle, shader *atlas.Shader, uniforms []uint32, fillRule graphicsdriver.FillRule, canSkipMipmap bool) {
 	if len(indices) == 0 {
 		return
 	}
@@ -123,7 +123,7 @@ func (m *Mipmap) DrawTriangles(srcs [graphics.ShaderImageCount]*Mipmap, vertices
 		imgs[i] = src.orig
 	}
 
-	m.orig.DrawTriangles(imgs, vertices, indices, blend, dstRegion, srcRegions, shader, uniforms, evenOdd)
+	m.orig.DrawTriangles(imgs, vertices, indices, blend, dstRegion, srcRegions, shader, uniforms, fillRule)
 	m.deallocateMipmaps()
 }
 
@@ -187,7 +187,7 @@ func (m *Mipmap) level(level int) *buffered.Image {
 	s := buffered.NewImage(w2, h2, m.imageType)
 
 	dstRegion := image.Rect(0, 0, w2, h2)
-	s.DrawTriangles([graphics.ShaderImageCount]*buffered.Image{src}, vs, is, graphicsdriver.BlendCopy, dstRegion, [graphics.ShaderImageCount]image.Rectangle{}, shader, nil, false)
+	s.DrawTriangles([graphics.ShaderImageCount]*buffered.Image{src}, vs, is, graphicsdriver.BlendCopy, dstRegion, [graphics.ShaderImageCount]image.Rectangle{}, shader, nil, graphicsdriver.FillAll)
 	m.setImg(level, s)
 
 	return m.imgs[level]

internal/restorable/image.go

@@ -87,7 +87,7 @@ type drawTrianglesHistoryItem struct {
 	srcRegions [graphics.ShaderImageCount]image.Rectangle
 	shader     *Shader
 	uniforms   []uint32
-	evenOdd    bool
+	fillRule   graphicsdriver.FillRule
 }
 
 type ImageType int
@@ -187,7 +187,7 @@ func (i *Image) Extend(width, height int) *Image {
 	vs := quadVertices(0, 0, float32(sw), float32(sh), 0, 0, float32(sw), float32(sh), 1, 1, 1, 1)
 	is := graphics.QuadIndices()
 	dr := image.Rect(0, 0, sw, sh)
-	newImg.DrawTriangles(srcs, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, NearestFilterShader, nil, false)
+	newImg.DrawTriangles(srcs, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, NearestFilterShader, nil, graphicsdriver.FillAll)
 	i.Dispose()
 
 	return newImg
@@ -206,7 +206,7 @@ func quadVertices(dx0, dy0, dx1, dy1, sx0, sy0, sx1, sy1, cr, cg, cb, ca float32
 func clearImage(i *graphicscommand.Image, region image.Rectangle) {
 	vs := quadVertices(float32(region.Min.X), float32(region.Min.Y), float32(region.Max.X), float32(region.Max.Y), 0, 0, 0, 0, 0, 0, 0, 0)
 	is := graphics.QuadIndices()
-	i.DrawTriangles([graphics.ShaderImageCount]*graphicscommand.Image{}, vs, is, graphicsdriver.BlendClear, region, [graphics.ShaderImageCount]image.Rectangle{}, clearShader.shader, nil, false)
+	i.DrawTriangles([graphics.ShaderImageCount]*graphicscommand.Image{}, vs, is, graphicsdriver.BlendClear, region, [graphics.ShaderImageCount]image.Rectangle{}, clearShader.shader, nil, graphicsdriver.FillAll)
 }
 
 // BasePixelsForTesting returns the image's basePixels for testing.
@@ -322,7 +322,7 @@ func (i *Image) WritePixels(pixels *graphics.ManagedBytes, region image.Rectangl
 //	5: Color G
 //	6: Color B
 //	7: Color Y
-func (i *Image) DrawTriangles(srcs [graphics.ShaderImageCount]*Image, vertices []float32, indices []uint32, blend graphicsdriver.Blend, dstRegion image.Rectangle, srcRegions [graphics.ShaderImageCount]image.Rectangle, shader *Shader, uniforms []uint32, evenOdd bool) {
+func (i *Image) DrawTriangles(srcs [graphics.ShaderImageCount]*Image, vertices []float32, indices []uint32, blend graphicsdriver.Blend, dstRegion image.Rectangle, srcRegions [graphics.ShaderImageCount]image.Rectangle, shader *Shader, uniforms []uint32, fillRule graphicsdriver.FillRule) {
 	if len(vertices) == 0 {
 		return
 	}
@@ -344,7 +344,7 @@ func (i *Image) DrawTriangles(srcs [graphics.ShaderImageCount]*Image, vertices [
 	if srcstale || !needsRestoring() || !i.needsRestoring() || i.stale {
 		i.makeStale(dstRegion)
 	} else {
-		i.appendDrawTrianglesHistory(srcs, vertices, indices, blend, dstRegion, srcRegions, shader, uniforms, evenOdd)
+		i.appendDrawTrianglesHistory(srcs, vertices, indices, blend, dstRegion, srcRegions, shader, uniforms, fillRule)
 	}
 
 	var imgs [graphics.ShaderImageCount]*graphicscommand.Image
@@ -354,11 +354,11 @@ func (i *Image) DrawTriangles(srcs [graphics.ShaderImageCount]*Image, vertices [
 		}
 		imgs[i] = src.image
 	}
-	i.image.DrawTriangles(imgs, vertices, indices, blend, dstRegion, srcRegions, shader.shader, uniforms, evenOdd)
+	i.image.DrawTriangles(imgs, vertices, indices, blend, dstRegion, srcRegions, shader.shader, uniforms, fillRule)
 }
 
 // appendDrawTrianglesHistory appends a draw-image history item to the image.
-func (i *Image) appendDrawTrianglesHistory(srcs [graphics.ShaderImageCount]*Image, vertices []float32, indices []uint32, blend graphicsdriver.Blend, dstRegion image.Rectangle, srcRegions [graphics.ShaderImageCount]image.Rectangle, shader *Shader, uniforms []uint32, evenOdd bool) {
+func (i *Image) appendDrawTrianglesHistory(srcs [graphics.ShaderImageCount]*Image, vertices []float32, indices []uint32, blend graphicsdriver.Blend, dstRegion image.Rectangle, srcRegions [graphics.ShaderImageCount]image.Rectangle, shader *Shader, uniforms []uint32, fillRule graphicsdriver.FillRule) {
 	if i.stale || !i.needsRestoring() {
 		panic("restorable: an image must not be stale or need restoring at appendDrawTrianglesHistory")
 	}
@@ -393,7 +393,7 @@ func (i *Image) appendDrawTrianglesHistory(srcs [graphics.ShaderImageCount]*Imag
 		srcRegions: srcRegions,
 		shader:     shader,
 		uniforms:   us,
-		evenOdd:    evenOdd,
+		fillRule:   fillRule,
 	}
 	i.drawTrianglesHistory = append(i.drawTrianglesHistory, item)
 }
@@ -610,7 +610,7 @@ func (i *Image) restore(graphicsDriver graphicsdriver.Graphics) error {
 			}
 			imgs[i] = img.image
 		}
-		gimg.DrawTriangles(imgs, c.vertices, c.indices, c.blend, c.dstRegion, c.srcRegions, c.shader.shader, c.uniforms, c.evenOdd)
+		gimg.DrawTriangles(imgs, c.vertices, c.indices, c.blend, c.dstRegion, c.srcRegions, c.shader.shader, c.uniforms, c.fillRule)
 	}
 
 	// In order to clear the draw-triangles history, read pixels from GPU.

internal/restorable/images_test.go

@@ -143,7 +143,7 @@ func TestRestoreChain(t *testing.T) {
 		vs := quadVertices(1, 1, 0, 0)
 		is := graphics.QuadIndices()
 		dr := image.Rect(0, 0, 1, 1)
-		imgs[i+1].DrawTriangles([graphics.ShaderImageCount]*restorable.Image{imgs[i]}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
+		imgs[i+1].DrawTriangles([graphics.ShaderImageCount]*restorable.Image{imgs[i]}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, graphicsdriver.FillAll)
 	}
 	if err := restorable.ResolveStaleImages(ui.Get().GraphicsDriverForTesting()); err != nil {
 		t.Fatal(err)
@@ -186,10 +186,10 @@ func TestRestoreChain2(t *testing.T) {
 
 	is := graphics.QuadIndices()
 	dr := image.Rect(0, 0, w, h)
-	imgs[8].DrawTriangles([graphics.ShaderImageCount]*restorable.Image{imgs[7]}, quadVertices(w, h, 0, 0), is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
+	imgs[8].DrawTriangles([graphics.ShaderImageCount]*restorable.Image{imgs[7]}, quadVertices(w, h, 0, 0), is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, graphicsdriver.FillAll)
-	imgs[9].DrawTriangles([graphics.ShaderImageCount]*restorable.Image{imgs[8]}, quadVertices(w, h, 0, 0), is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
+	imgs[9].DrawTriangles([graphics.ShaderImageCount]*restorable.Image{imgs[8]}, quadVertices(w, h, 0, 0), is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, graphicsdriver.FillAll)
 	for i := 0; i < 7; i++ {
-		imgs[i+1].DrawTriangles([graphics.ShaderImageCount]*restorable.Image{imgs[i]}, quadVertices(w, h, 0, 0), is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
+		imgs[i+1].DrawTriangles([graphics.ShaderImageCount]*restorable.Image{imgs[i]}, quadVertices(w, h, 0, 0), is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, graphicsdriver.FillAll)
 	}
 
 	if err := restorable.ResolveStaleImages(ui.Get().GraphicsDriverForTesting()); err != nil {
@@ -230,10 +230,10 @@ func TestRestoreOverrideSource(t *testing.T) {
 	img1.WritePixels(bytesToManagedBytes([]byte{clr0.R, clr0.G, clr0.B, clr0.A}), image.Rect(0, 0, w, h))
 	is := graphics.QuadIndices()
 	dr := image.Rect(0, 0, w, h)
-	img2.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img1}, quadVertices(w, h, 0, 0), is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
+	img2.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img1}, quadVertices(w, h, 0, 0), is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, graphicsdriver.FillAll)
-	img3.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img2}, quadVertices(w, h, 0, 0), is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
+	img3.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img2}, quadVertices(w, h, 0, 0), is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, graphicsdriver.FillAll)
 	img0.WritePixels(bytesToManagedBytes([]byte{clr1.R, clr1.G, clr1.B, clr1.A}), image.Rect(0, 0, w, h))
-	img1.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img0}, quadVertices(w, h, 0, 0), is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
+	img1.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img0}, quadVertices(w, h, 0, 0), is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, graphicsdriver.FillAll)
 	if err := restorable.ResolveStaleImages(ui.Get().GraphicsDriverForTesting()); err != nil {
 		t.Fatal(err)
 	}
@@ -313,23 +313,23 @@ func TestRestoreComplexGraph(t *testing.T) {
 	is := graphics.QuadIndices()
 	dr := image.Rect(0, 0, w, h)
 	vs := quadVertices(w, h, 0, 0)
-	img3.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img0}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
+	img3.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img0}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, graphicsdriver.FillAll)
 	vs = quadVertices(w, h, 1, 0)
-	img3.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img1}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
+	img3.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img1}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, graphicsdriver.FillAll)
 	vs = quadVertices(w, h, 1, 0)
-	img4.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img1}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
+	img4.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img1}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, graphicsdriver.FillAll)
 	vs = quadVertices(w, h, 2, 0)
-	img4.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img2}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
+	img4.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img2}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, graphicsdriver.FillAll)
 	vs = quadVertices(w, h, 0, 0)
-	img5.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img3}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
+	img5.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img3}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, graphicsdriver.FillAll)
 	vs = quadVertices(w, h, 0, 0)
-	img6.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img3}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
+	img6.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img3}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, graphicsdriver.FillAll)
 	vs = quadVertices(w, h, 1, 0)
-	img6.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img4}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
+	img6.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img4}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, graphicsdriver.FillAll)
 	vs = quadVertices(w, h, 0, 0)
-	img7.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img2}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
+	img7.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img2}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, graphicsdriver.FillAll)
 	vs = quadVertices(w, h, 2, 0)
-	img7.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img3}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
+	img7.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img3}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, graphicsdriver.FillAll)
 	if err := restorable.ResolveStaleImages(ui.Get().GraphicsDriverForTesting()); err != nil {
 		t.Fatal(err)
 	}
@@ -422,8 +422,8 @@ func TestRestoreRecursive(t *testing.T) {
 	}()
 	is := graphics.QuadIndices()
 	dr := image.Rect(0, 0, w, h)
-	img1.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img0}, quadVertices(w, h, 1, 0), is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
+	img1.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img0}, quadVertices(w, h, 1, 0), is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, graphicsdriver.FillAll)
-	img0.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img1}, quadVertices(w, h, 1, 0), is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
+	img0.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img1}, quadVertices(w, h, 1, 0), is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, graphicsdriver.FillAll)
 	if err := restorable.ResolveStaleImages(ui.Get().GraphicsDriverForTesting()); err != nil {
 		t.Fatal(err)
 	}
@@ -522,7 +522,7 @@ func TestDrawTrianglesAndWritePixels(t *testing.T) {
 	vs := quadVertices(1, 1, 0, 0)
 	is := graphics.QuadIndices()
 	dr := image.Rect(0, 0, 2, 1)
-	img1.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img0}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
+	img1.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img0}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, graphicsdriver.FillAll)
 	img1.WritePixels(bytesToManagedBytes([]byte{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff}), image.Rect(0, 0, 2, 1))
 
 	if err := restorable.ResolveStaleImages(ui.Get().GraphicsDriverForTesting()); err != nil {
@@ -560,8 +560,8 @@ func TestDispose(t *testing.T) {
 
 	is := graphics.QuadIndices()
 	dr := image.Rect(0, 0, 1, 1)
-	img1.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img2}, quadVertices(1, 1, 0, 0), is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
+	img1.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img2}, quadVertices(1, 1, 0, 0), is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, graphicsdriver.FillAll)
-	img0.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img1}, quadVertices(1, 1, 0, 0), is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
+	img0.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img1}, quadVertices(1, 1, 0, 0), is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, graphicsdriver.FillAll)
 	img1.Dispose()
 
 	if err := restorable.ResolveStaleImages(ui.Get().GraphicsDriverForTesting()); err != nil {
@@ -670,7 +670,7 @@ func TestWritePixelsOnly(t *testing.T) {
 	vs := quadVertices(1, 1, 0, 0)
 	is := graphics.QuadIndices()
 	dr := image.Rect(0, 0, 1, 1)
-	img1.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img0}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
+	img1.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img0}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, graphicsdriver.FillAll)
 	img0.WritePixels(bytesToManagedBytes([]byte{5, 6, 7, 8}), image.Rect(0, 0, 1, 1))
 
 	// BasePixelsForTesting is available without GPU accessing.
@@ -724,7 +724,7 @@ func TestReadPixelsFromVolatileImage(t *testing.T) {
 	vs := quadVertices(1, 1, 0, 0)
 	is := graphics.QuadIndices()
 	dr := image.Rect(0, 0, w, h)
-	dst.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{src}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
+	dst.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{src}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, graphicsdriver.FillAll)
 
 	// Read the pixels. If the implementation is correct, dst tries to read its pixels from GPU due to being
 	// stale.
@@ -748,7 +748,7 @@ func TestAllowWritePixelsAfterDrawTriangles(t *testing.T) {
 	vs := quadVertices(w, h, 0, 0)
 	is := graphics.QuadIndices()
 	dr := image.Rect(0, 0, w, h)
-	dst.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{src}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
+	dst.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{src}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, graphicsdriver.FillAll)
 	dst.WritePixels(bytesToManagedBytes(make([]byte, 4*w*h)), image.Rect(0, 0, w, h))
 	// WritePixels for a whole image doesn't panic.
 }
@@ -767,7 +767,7 @@ func TestAllowWritePixelsForPartAfterDrawTriangles(t *testing.T) {
 	vs := quadVertices(w, h, 0, 0)
 	is := graphics.QuadIndices()
 	dr := image.Rect(0, 0, w, h)
-	dst.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{src}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
+	dst.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{src}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, graphicsdriver.FillAll)
 	dst.WritePixels(bytesToManagedBytes(make([]byte, 4*2*2)), image.Rect(0, 0, 2, 2))
 	// WritePixels for a part of image doesn't panic.
 
@@ -861,7 +861,7 @@ func TestDrawTrianglesAndExtend(t *testing.T) {
 	vs := quadVertices(w, h, 0, 0)
 	is := graphics.QuadIndices()
 	dr := image.Rect(0, 0, w, h)
-	orig.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{src}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
+	orig.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{src}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, graphicsdriver.FillAll)
 	extended := orig.Extend(w*2, h*2) // After this, orig is already disposed.
 
 	result := make([]byte, 4*(w*2)*(h*2))
@@ -911,7 +911,7 @@ func TestMutateSlices(t *testing.T) {
 	is := make([]uint32, len(graphics.QuadIndices()))
 	copy(is, graphics.QuadIndices())
 	dr := image.Rect(0, 0, w, h)
-	dst.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{src}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
+	dst.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{src}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, graphicsdriver.FillAll)
 	for i := range vs {
 		vs[i] = 0
 	}
@@ -1103,7 +1103,7 @@ func TestDrawTrianglesAndReadPixels(t *testing.T) {
 	vs := quadVertices(w, h, 0, 0)
 	is := graphics.QuadIndices()
 	dr := image.Rect(0, 0, w, h)
-	dst.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{src}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
+	dst.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{src}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, graphicsdriver.FillAll)
 
 	pix := make([]byte, 4*w*h)
 	if err := dst.ReadPixels(ui.Get().GraphicsDriverForTesting(), pix, image.Rect(0, 0, w, h)); err != nil {
@@ -1127,7 +1127,7 @@ func TestWritePixelsAndDrawTriangles(t *testing.T) {
 	vs := quadVertices(1, 1, 1, 0)
 	is := graphics.QuadIndices()
 	dr := image.Rect(1, 0, 2, 1)
-	dst.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{src}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
+	dst.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{src}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, graphicsdriver.FillAll)
 
 	// Get the pixels.
 	pix := make([]byte, 4*2*1)

internal/restorable/shader_test.go

@@ -46,7 +46,7 @@ func clearImage(img *restorable.Image, w, h int) {
 	}
 	is := graphics.QuadIndices()
 	dr := image.Rect(0, 0, w, h)
-	img.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{emptyImage}, vs, is, graphicsdriver.BlendClear, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
+	img.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{emptyImage}, vs, is, graphicsdriver.BlendClear, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, graphicsdriver.FillAll)
 }
 
 func TestShader(t *testing.T) {
@@ -55,7 +55,7 @@ func TestShader(t *testing.T) {
 
 	s := restorable.NewShader(etesting.ShaderProgramFill(0xff, 0, 0, 0xff))
 	dr := image.Rect(0, 0, 1, 1)
-	img.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{}, quadVertices(1, 1, 0, 0), graphics.QuadIndices(), graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, s, nil, false)
+	img.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{}, quadVertices(1, 1, 0, 0), graphics.QuadIndices(), graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, s, nil, graphicsdriver.FillAll)
 
 	if err := restorable.ResolveStaleImages(ui.Get().GraphicsDriverForTesting()); err != nil {
 		t.Fatal(err)
@@ -85,7 +85,7 @@ func TestShaderChain(t *testing.T) {
 	s := restorable.NewShader(etesting.ShaderProgramImages(1))
 	for i := 0; i < num-1; i++ {
 		dr := image.Rect(0, 0, 1, 1)
-		imgs[i+1].DrawTriangles([graphics.ShaderImageCount]*restorable.Image{imgs[i]}, quadVertices(1, 1, 0, 0), graphics.QuadIndices(), graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, s, nil, false)
+		imgs[i+1].DrawTriangles([graphics.ShaderImageCount]*restorable.Image{imgs[i]}, quadVertices(1, 1, 0, 0), graphics.QuadIndices(), graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, s, nil, graphicsdriver.FillAll)
 	}
 
 	if err := restorable.ResolveStaleImages(ui.Get().GraphicsDriverForTesting()); err != nil {
@@ -117,7 +117,7 @@ func TestShaderMultipleSources(t *testing.T) {
 
 	s := restorable.NewShader(etesting.ShaderProgramImages(3))
 	dr := image.Rect(0, 0, 1, 1)
-	dst.DrawTriangles(srcs, quadVertices(1, 1, 0, 0), graphics.QuadIndices(), graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, s, nil, false)
+	dst.DrawTriangles(srcs, quadVertices(1, 1, 0, 0), graphics.QuadIndices(), graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, s, nil, graphicsdriver.FillAll)
 
 	// Clear one of the sources after DrawTriangles. dst should not be affected.
 	clearImage(srcs[0], 1, 1)
@@ -154,7 +154,7 @@ func TestShaderMultipleSourcesOnOneTexture(t *testing.T) {
 		image.Rect(1, 0, 2, 1),
 		image.Rect(2, 0, 3, 1),
 	}
-	dst.DrawTriangles(srcs, quadVertices(1, 1, 0, 0), graphics.QuadIndices(), graphicsdriver.BlendCopy, dr, srcRegions, s, nil, false)
+	dst.DrawTriangles(srcs, quadVertices(1, 1, 0, 0), graphics.QuadIndices(), graphicsdriver.BlendCopy, dr, srcRegions, s, nil, graphicsdriver.FillAll)
 
 	// Clear one of the sources after DrawTriangles. dst should not be affected.
 	clearImage(srcs[0], 3, 1)
@@ -179,7 +179,7 @@ func TestShaderDispose(t *testing.T) {
 
 	s := restorable.NewShader(etesting.ShaderProgramFill(0xff, 0, 0, 0xff))
 	dr := image.Rect(0, 0, 1, 1)
-	img.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{}, quadVertices(1, 1, 0, 0), graphics.QuadIndices(), graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, s, nil, false)
+	img.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{}, quadVertices(1, 1, 0, 0), graphics.QuadIndices(), graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, s, nil, graphicsdriver.FillAll)
 
 	// Dispose the shader. This should invalidate all the images using this shader i.e., all the images become
 	// stale.

internal/ui/image.go

@@ -80,7 +80,7 @@ func (i *Image) Deallocate() {
 	i.dotsBuffer = nil
 }
 
-func (i *Image) DrawTriangles(srcs [graphics.ShaderImageCount]*Image, vertices []float32, indices []uint32, blend graphicsdriver.Blend, dstRegion image.Rectangle, srcRegions [graphics.ShaderImageCount]image.Rectangle, shader *Shader, uniforms []uint32, evenOdd bool, canSkipMipmap bool, antialias bool) {
+func (i *Image) DrawTriangles(srcs [graphics.ShaderImageCount]*Image, vertices []float32, indices []uint32, blend graphicsdriver.Blend, dstRegion image.Rectangle, srcRegions [graphics.ShaderImageCount]image.Rectangle, shader *Shader, uniforms []uint32, fillRule graphicsdriver.FillRule, canSkipMipmap bool, antialias bool) {
 	if i.modifyCallback != nil {
 		i.modifyCallback()
 	}
@@ -104,7 +104,7 @@ func (i *Image) DrawTriangles(srcs [graphics.ShaderImageCount]*Image, vertices [
 			i.bigOffscreenBuffer = i.ui.newBigOffscreenImage(i, imageType)
 		}
 
-		i.bigOffscreenBuffer.drawTriangles(srcs, vertices, indices, blend, dstRegion, srcRegions, shader, uniforms, evenOdd, canSkipMipmap, false)
+		i.bigOffscreenBuffer.drawTriangles(srcs, vertices, indices, blend, dstRegion, srcRegions, shader, uniforms, fillRule, canSkipMipmap, false)
 		return
 	}
 
@@ -119,7 +119,7 @@ func (i *Image) DrawTriangles(srcs [graphics.ShaderImageCount]*Image, vertices [
 		srcMipmaps[i] = src.mipmap
 	}
 
-	i.mipmap.DrawTriangles(srcMipmaps, vertices, indices, blend, dstRegion, srcRegions, shader.shader, uniforms, evenOdd, canSkipMipmap)
+	i.mipmap.DrawTriangles(srcMipmaps, vertices, indices, blend, dstRegion, srcRegions, shader.shader, uniforms, fillRule, canSkipMipmap)
 }
 
 func (i *Image) WritePixels(pix []byte, region image.Rectangle) {
@@ -253,7 +253,7 @@ func (i *Image) flushDotsBufferIfNeeded() {
 	dr := image.Rect(0, 0, i.width, i.height)
 	blend := graphicsdriver.BlendCopy
 	i.lastBlend = blend
-	i.mipmap.DrawTriangles(srcs, vs, is, blend, dr, [graphics.ShaderImageCount]image.Rectangle{}, NearestFilterShader.shader, nil, false, true)
+	i.mipmap.DrawTriangles(srcs, vs, is, blend, dr, [graphics.ShaderImageCount]image.Rectangle{}, NearestFilterShader.shader, nil, graphicsdriver.FillAll, true)
 }
 
 func (i *Image) flushBigOffscreenBufferIfNeeded() {
@@ -290,7 +290,7 @@ func (i *Image) Fill(r, g, b, a float32, region image.Rectangle) {
 		blend = graphicsdriver.BlendSourceOver
 	}
 	// i.lastBlend is updated in DrawTriangles.
-	i.DrawTriangles(srcs, i.tmpVerticesForFill, is, blend, region, [graphics.ShaderImageCount]image.Rectangle{}, NearestFilterShader, nil, false, true, false)
+	i.DrawTriangles(srcs, i.tmpVerticesForFill, is, blend, region, [graphics.ShaderImageCount]image.Rectangle{}, NearestFilterShader, nil, graphicsdriver.FillAll, true, false)
 }
 
 type bigOffscreenImage struct {
@@ -324,7 +324,7 @@ func (i *bigOffscreenImage) deallocate() {
 	i.dirty = false
 }
 
-func (i *bigOffscreenImage) drawTriangles(srcs [graphics.ShaderImageCount]*Image, vertices []float32, indices []uint32, blend graphicsdriver.Blend, dstRegion image.Rectangle, srcRegions [graphics.ShaderImageCount]image.Rectangle, shader *Shader, uniforms []uint32, evenOdd bool, canSkipMipmap bool, antialias bool) {
+func (i *bigOffscreenImage) drawTriangles(srcs [graphics.ShaderImageCount]*Image, vertices []float32, indices []uint32, blend graphicsdriver.Blend, dstRegion image.Rectangle, srcRegions [graphics.ShaderImageCount]image.Rectangle, shader *Shader, uniforms []uint32, fillRule graphicsdriver.FillRule, canSkipMipmap bool, antialias bool) {
 	if i.blend != blend {
 		i.flush()
 	}
@@ -359,7 +359,7 @@ func (i *bigOffscreenImage) drawTriangles(srcs [graphics.ShaderImageCount]*Image
 			1, 1, 1, 1)
 		is := graphics.QuadIndices()
 		dstRegion := image.Rect(0, 0, i.region.Dx()*bigOffscreenScale, i.region.Dy()*bigOffscreenScale)
-		i.image.DrawTriangles(srcs, i.tmpVerticesForCopying, is, graphicsdriver.BlendCopy, dstRegion, [graphics.ShaderImageCount]image.Rectangle{}, NearestFilterShader, nil, false, true, false)
+		i.image.DrawTriangles(srcs, i.tmpVerticesForCopying, is, graphicsdriver.BlendCopy, dstRegion, [graphics.ShaderImageCount]image.Rectangle{}, NearestFilterShader, nil, graphicsdriver.FillAll, true, false)
 	}
 
 	for idx := 0; idx < len(vertices); idx += graphics.VertexFloatCount {
@@ -375,7 +375,7 @@ func (i *bigOffscreenImage) drawTriangles(srcs [graphics.ShaderImageCount]*Image
 	dstRegion.Max.X *= bigOffscreenScale
 	dstRegion.Max.Y *= bigOffscreenScale
 
-	i.image.DrawTriangles(srcs, vertices, indices, blend, dstRegion, srcRegions, shader, uniforms, evenOdd, canSkipMipmap, false)
+	i.image.DrawTriangles(srcs, vertices, indices, blend, dstRegion, srcRegions, shader, uniforms, fillRule, canSkipMipmap, false)
 	i.dirty = true
 }
 
@@ -407,7 +407,7 @@ func (i *bigOffscreenImage) flush() {
 	if i.blend != graphicsdriver.BlendSourceOver {
 		blend = graphicsdriver.BlendCopy
 	}
-	i.orig.DrawTriangles(srcs, i.tmpVerticesForFlushing, is, blend, dstRegion, [graphics.ShaderImageCount]image.Rectangle{}, LinearFilterShader, nil, false, true, false)
+	i.orig.DrawTriangles(srcs, i.tmpVerticesForFlushing, is, blend, dstRegion, [graphics.ShaderImageCount]image.Rectangle{}, LinearFilterShader, nil, graphicsdriver.FillAll, true, false)
 
 	i.image.clear()
 	i.dirty = false