graphicsutil: Accept matrix parameters directly for performance

image.go

@@ -126,14 +126,6 @@ func (i *Image) fill(r, g, b, a uint8) {
 	_ = i.DrawImage(emptyImage, op)
 }
 
-type geoM32 struct {
-	inner *GeoM
-}
-
-func (g geoM32) Elements() (a, b, c, d, tx, ty float32) {
-	return g.inner.elements()
-}
-
 // DrawImage draws the given image on the image i.
 //
 // DrawImage accepts the options. For details, see the document of DrawImageOptions.
@@ -219,7 +211,7 @@ func (i *Image) DrawImage(img *Image, options *DrawImageOptions) error {
 			sy1 = r.Max.Y
 		}
 	}
-	geom := geoM32{&options.GeoM}
+	geom := &options.GeoM
 	if sx0 < 0 || sy0 < 0 {
 		dx := 0.0
 		dy := 0.0
@@ -231,10 +223,9 @@ func (i *Image) DrawImage(img *Image, options *DrawImageOptions) error {
 			dy = -float64(sy0)
 			sy0 = 0
 		}
-		g := &GeoM{}
-		g.Translate(dx, dy)
-		g.Concat(options.GeoM)
-		geom = geoM32{g}
+		geom = &GeoM{}
+		geom.Translate(dx, dy)
+		geom.Concat(options.GeoM)
 	}
 
 	mode := opengl.CompositeMode(options.CompositeMode)
@@ -246,7 +237,8 @@ func (i *Image) DrawImage(img *Image, options *DrawImageOptions) error {
 		filter = graphics.Filter(img.filter)
 	}
 
-	i.shareableImage.DrawImage(img.shareableImage, sx0, sy0, sx1, sy1, geom, options.ColorM.impl, mode, filter)
+	a, b, c, d, tx, ty := geom.elements()
+	i.shareableImage.DrawImage(img.shareableImage, sx0, sy0, sx1, sy1, a, b, c, d, tx, ty, options.ColorM.impl, mode, filter)
 	return nil
 }
 

internal/graphicsutil/vertices.go

@@ -43,15 +43,11 @@ func (v *verticesBackend) sliceForOneQuad() []float32 {
 	return s
 }
 
-type GeoM interface {
-	Elements() (a, b, c, d, tx, ty float32)
-}
-
 func isPowerOf2(x int) bool {
 	return (x & (x - 1)) == 0
 }
 
-func QuadVertices(width, height int, sx0, sy0, sx1, sy1 int, geom GeoM) []float32 {
+func QuadVertices(width, height int, sx0, sy0, sx1, sy1 int, a, b, c, d, tx, ty float32) []float32 {
 	if !isPowerOf2(width) {
 		panic("not reached")
 	}
@@ -69,13 +65,12 @@ func QuadVertices(width, height int, sx0, sy0, sx1, sy1 int, geom GeoM) []float3
 	wf := float32(width)
 	hf := float32(height)
 	u0, v0, u1, v1 := float32(sx0)/wf, float32(sy0)/hf, float32(sx1)/wf, float32(sy1)/hf
-	return quadVerticesImpl(float32(sx1-sx0), float32(sy1-sy0), u0, v0, u1, v1, geom)
+	return quadVerticesImpl(float32(sx1-sx0), float32(sy1-sy0), u0, v0, u1, v1, a, b, c, d, tx, ty)
 }
 
-func quadVerticesImpl(x, y, u0, v0, u1, v1 float32, geom GeoM) []float32 {
+func quadVerticesImpl(x, y, u0, v0, u1, v1, a, b, c, d, tx, ty float32) []float32 {
 	vs := theVerticesBackend.sliceForOneQuad()
 
-	a, b, c, d, tx, ty := geom.Elements()
 	ax, by, cx, dy := a*x, b*y, c*x, d*y
 
 	// Vertex coordinates

internal/restorable/image.go

@@ -136,17 +136,6 @@ var (
 	quadIndices = []uint16{0, 1, 2, 1, 2, 3}
 )
 
-type geoM struct {
-	scaleX float32
-	scaleY float32
-	tx     float32
-	ty     float32
-}
-
-func (g *geoM) Elements() (a, b, c, d, tx, ty float32) {
-	return g.scaleX, 0, 0, g.scaleY, g.tx, g.ty
-}
-
 // ReplacePixels replaces the image pixels with the given pixels slice.
 //
 // If pixels is nil, ReplacePixels clears the specified reagion.
@@ -172,12 +161,9 @@ func (i *Image) ReplacePixels(pixels []byte, x, y, width, height int) {
 		// and this image can be restored without dummyImage.
 		w, h := dummyImage.Size()
 		colorm := (*affine.ColorM)(nil).Scale(0, 0, 0, 0)
-		vs := graphicsutil.QuadVertices(w, h, 0, 0, w, h, &geoM{
-			scaleX: float32(width) / float32(w),
-			scaleY: float32(height) / float32(h),
-			tx:     float32(x),
-			ty:     float32(y),
-		})
+		vs := graphicsutil.QuadVertices(w, h, 0, 0, w, h,
+			float32(width)/float32(w), 0, 0, float32(height)/float32(h),
+			float32(x), float32(y))
 		i.image.DrawImage(dummyImage.image, vs, quadIndices, colorm, opengl.CompositeModeCopy, graphics.FilterNearest)
 	}
 

internal/restorable/images_test.go

@@ -105,12 +105,6 @@ var (
 	quadIndices = []uint16{0, 1, 2, 1, 2, 3}
 )
 
-type idGeoM struct{}
-
-func (idGeoM) Elements() (a, b, c, d, tx, ty float32) {
-	return 1, 0, 0, 1, 0, 0
-}
-
 func TestRestoreChain(t *testing.T) {
 	const num = 10
 	imgs := []*Image{}
@@ -128,7 +122,7 @@ func TestRestoreChain(t *testing.T) {
 	fill(imgs[0], clr.R, clr.G, clr.B, clr.A)
 	for i := 0; i < num-1; i++ {
 		w, h := imgs[i].Size()
-		vs := graphicsutil.QuadVertices(w, h, 0, 0, 1, 1, idGeoM{})
+		vs := graphicsutil.QuadVertices(w, h, 0, 0, 1, 1, 1, 0, 0, 1, 0, 0)
 		imgs[i+1].DrawImage(imgs[i], vs, quadIndices, nil, opengl.CompositeModeCopy, graphics.FilterNearest)
 	}
 	if err := ResolveStaleImages(); err != nil {
@@ -171,7 +165,7 @@ func TestRestoreChain2(t *testing.T) {
 	clr8 := color.RGBA{0x00, 0x00, 0xff, 0xff}
 	fill(imgs[8], clr8.R, clr8.G, clr8.B, clr8.A)
 
-	vs := graphicsutil.QuadVertices(w, h, 0, 0, w, h, idGeoM{})
+	vs := graphicsutil.QuadVertices(w, h, 0, 0, w, h, 1, 0, 0, 1, 0, 0)
 	imgs[8].DrawImage(imgs[7], vs, quadIndices, nil, opengl.CompositeModeCopy, graphics.FilterNearest)
 	imgs[9].DrawImage(imgs[8], vs, quadIndices, nil, opengl.CompositeModeCopy, graphics.FilterNearest)
 	for i := 0; i < 7; i++ {
@@ -218,7 +212,7 @@ func TestRestoreOverrideSource(t *testing.T) {
 	clr0 := color.RGBA{0x00, 0x00, 0x00, 0xff}
 	clr1 := color.RGBA{0x00, 0x00, 0x01, 0xff}
 	fill(img1, clr0.R, clr0.G, clr0.B, clr0.A)
-	vs := graphicsutil.QuadVertices(w, h, 0, 0, w, h, idGeoM{})
+	vs := graphicsutil.QuadVertices(w, h, 0, 0, w, h, 1, 0, 0, 1, 0, 0)
 	img2.DrawImage(img1, vs, quadIndices, nil, opengl.CompositeModeSourceOver, graphics.FilterNearest)
 	img3.DrawImage(img2, vs, quadIndices, nil, opengl.CompositeModeSourceOver, graphics.FilterNearest)
 	fill(img0, clr1.R, clr1.G, clr1.B, clr1.A)
@@ -262,15 +256,6 @@ func TestRestoreOverrideSource(t *testing.T) {
 	}
 }
 
-type geoM struct {
-	tx float32
-	ty float32
-}
-
-func (g *geoM) Elements() (a, b, c, d, tx, ty float32) {
-	return 1, 0, 0, 1, g.tx, g.ty
-}
-
 func TestRestoreComplexGraph(t *testing.T) {
 	const (
 		w = 4
@@ -313,23 +298,23 @@ func TestRestoreComplexGraph(t *testing.T) {
 		img1.Dispose()
 		img0.Dispose()
 	}()
-	vs := graphicsutil.QuadVertices(w, h, 0, 0, w, h, &geoM{0, 0})
+	vs := graphicsutil.QuadVertices(w, h, 0, 0, w, h, 1, 0, 0, 1, 0, 0)
 	img3.DrawImage(img0, vs, quadIndices, nil, opengl.CompositeModeSourceOver, graphics.FilterNearest)
-	vs = graphicsutil.QuadVertices(w, h, 0, 0, w, h, &geoM{1, 0})
+	vs = graphicsutil.QuadVertices(w, h, 0, 0, w, h, 1, 0, 0, 1, 1, 0)
 	img3.DrawImage(img1, vs, quadIndices, nil, opengl.CompositeModeSourceOver, graphics.FilterNearest)
-	vs = graphicsutil.QuadVertices(w, h, 0, 0, w, h, &geoM{1, 0})
+	vs = graphicsutil.QuadVertices(w, h, 0, 0, w, h, 1, 0, 0, 1, 1, 0)
 	img4.DrawImage(img1, vs, quadIndices, nil, opengl.CompositeModeSourceOver, graphics.FilterNearest)
-	vs = graphicsutil.QuadVertices(w, h, 0, 0, w, h, &geoM{2, 0})
+	vs = graphicsutil.QuadVertices(w, h, 0, 0, w, h, 1, 0, 0, 1, 2, 0)
 	img4.DrawImage(img2, vs, quadIndices, nil, opengl.CompositeModeSourceOver, graphics.FilterNearest)
-	vs = graphicsutil.QuadVertices(w, h, 0, 0, w, h, &geoM{0, 0})
+	vs = graphicsutil.QuadVertices(w, h, 0, 0, w, h, 1, 0, 0, 1, 0, 0)
 	img5.DrawImage(img3, vs, quadIndices, nil, opengl.CompositeModeSourceOver, graphics.FilterNearest)
-	vs = graphicsutil.QuadVertices(w, h, 0, 0, w, h, &geoM{0, 0})
+	vs = graphicsutil.QuadVertices(w, h, 0, 0, w, h, 1, 0, 0, 1, 0, 0)
 	img6.DrawImage(img3, vs, quadIndices, nil, opengl.CompositeModeSourceOver, graphics.FilterNearest)
-	vs = graphicsutil.QuadVertices(w, h, 0, 0, w, h, &geoM{1, 0})
+	vs = graphicsutil.QuadVertices(w, h, 0, 0, w, h, 1, 0, 0, 1, 1, 0)
 	img6.DrawImage(img4, vs, quadIndices, nil, opengl.CompositeModeSourceOver, graphics.FilterNearest)
-	vs = graphicsutil.QuadVertices(w, h, 0, 0, w, h, &geoM{0, 0})
+	vs = graphicsutil.QuadVertices(w, h, 0, 0, w, h, 1, 0, 0, 1, 0, 0)
 	img7.DrawImage(img2, vs, quadIndices, nil, opengl.CompositeModeSourceOver, graphics.FilterNearest)
-	vs = graphicsutil.QuadVertices(w, h, 0, 0, w, h, &geoM{2, 0})
+	vs = graphicsutil.QuadVertices(w, h, 0, 0, w, h, 1, 0, 0, 1, 2, 0)
 	img7.DrawImage(img3, vs, quadIndices, nil, opengl.CompositeModeSourceOver, graphics.FilterNearest)
 	if err := ResolveStaleImages(); err != nil {
 		t.Fatal(err)
@@ -422,7 +407,7 @@ func TestRestoreRecursive(t *testing.T) {
 		img1.Dispose()
 		img0.Dispose()
 	}()
-	vs := graphicsutil.QuadVertices(w, h, 0, 0, w, h, &geoM{1, 0})
+	vs := graphicsutil.QuadVertices(w, h, 0, 0, w, h, 1, 0, 0, 1, 1, 0)
 	img1.DrawImage(img0, vs, quadIndices, nil, opengl.CompositeModeSourceOver, graphics.FilterNearest)
 	img0.DrawImage(img1, vs, quadIndices, nil, opengl.CompositeModeSourceOver, graphics.FilterNearest)
 	if err := ResolveStaleImages(); err != nil {
@@ -519,7 +504,7 @@ func TestDrawImageAndReplacePixels(t *testing.T) {
 	img1 := NewImage(2, 1, false)
 	defer img1.Dispose()
 
-	vs := graphicsutil.QuadVertices(1, 1, 0, 0, 1, 1, idGeoM{})
+	vs := graphicsutil.QuadVertices(1, 1, 0, 0, 1, 1, 1, 0, 0, 1, 0, 0)
 	img1.DrawImage(img0, vs, quadIndices, nil, opengl.CompositeModeCopy, graphics.FilterNearest)
 	img1.ReplacePixels([]byte{0xff, 0xff, 0xff, 0xff}, 1, 0, 1, 1)
 
@@ -555,7 +540,7 @@ func TestDispose(t *testing.T) {
 	img2 := newImageFromImage(base2)
 	defer img2.Dispose()
 
-	vs := graphicsutil.QuadVertices(1, 1, 0, 0, 1, 1, idGeoM{})
+	vs := graphicsutil.QuadVertices(1, 1, 0, 0, 1, 1, 1, 0, 0, 1, 0, 0)
 	img1.DrawImage(img2, vs, quadIndices, nil, opengl.CompositeModeCopy, graphics.FilterNearest)
 	img0.DrawImage(img1, vs, quadIndices, nil, opengl.CompositeModeCopy, graphics.FilterNearest)
 	img1.Dispose()
@@ -587,7 +572,7 @@ func TestDoubleResolve(t *testing.T) {
 	base.Pix[3] = 0xff
 	img1 := newImageFromImage(base)
 
-	vs := graphicsutil.QuadVertices(1, 1, 0, 0, 1, 1, idGeoM{})
+	vs := graphicsutil.QuadVertices(1, 1, 0, 0, 1, 1, 1, 0, 0, 1, 0, 0)
 	img0.DrawImage(img1, vs, quadIndices, nil, opengl.CompositeModeCopy, graphics.FilterNearest)
 	img0.ReplacePixels([]uint8{0x00, 0xff, 0x00, 0xff}, 1, 1, 1, 1)
 	// Now img0 is stale.

internal/shareable/shareable.go

@@ -67,7 +67,7 @@ func (b *backend) TryAlloc(width, height int) (*packing.Node, bool) {
 	newImg := restorable.NewImage(s, s, false)
 	oldImg := b.restorable
 	w, h := oldImg.Size()
-	vs := graphicsutil.QuadVertices(w, h, 0, 0, w, h, idGeoM{})
+	vs := graphicsutil.QuadVertices(w, h, 0, 0, w, h, 1, 0, 0, 1, 0, 0)
 	newImg.DrawImage(oldImg, vs, quadIndices, nil, opengl.CompositeModeCopy, graphics.FilterNearest)
 	oldImg.Dispose()
 	b.restorable = newImg
@@ -98,12 +98,6 @@ type Image struct {
 	node *packing.Node
 }
 
-type idGeoM struct{}
-
-func (idGeoM) Elements() (a, b, c, d, tx, ty float32) {
-	return 1, 0, 0, 1, 0, 0
-}
-
 func (i *Image) ensureNotShared() {
 	if i.backend == nil {
 		i.allocate(false)
@@ -117,7 +111,7 @@ func (i *Image) ensureNotShared() {
 	x, y, w, h := i.region()
 	newImg := restorable.NewImage(w, h, false)
 	vw, vh := i.backend.restorable.Size()
-	vs := graphicsutil.QuadVertices(vw, vh, x, y, x+w, y+h, idGeoM{})
+	vs := graphicsutil.QuadVertices(vw, vh, x, y, x+w, y+h, 1, 0, 0, 1, 0, 0)
 	newImg.DrawImage(i.backend.restorable, vs, quadIndices, nil, opengl.CompositeModeCopy, graphics.FilterNearest)
 
 	i.dispose(false)
@@ -141,7 +135,7 @@ func (i *Image) Size() (width, height int) {
 	return i.width, i.height
 }
 
-func (i *Image) DrawImage(img *Image, sx0, sy0, sx1, sy1 int, geom graphicsutil.GeoM, colorm *affine.ColorM, mode opengl.CompositeMode, filter graphics.Filter) {
+func (i *Image) DrawImage(img *Image, sx0, sy0, sx1, sy1 int, a, b, c, d, tx, ty float32, colorm *affine.ColorM, mode opengl.CompositeMode, filter graphics.Filter) {
 	backendsM.Lock()
 	defer backendsM.Unlock()
 
@@ -165,7 +159,7 @@ func (i *Image) DrawImage(img *Image, sx0, sy0, sx1, sy1 int, geom graphicsutil.
 
 	dx, dy, _, _ := img.region()
 	w, h := img.backend.restorable.SizePowerOf2()
-	vs := graphicsutil.QuadVertices(w, h, sx0+dx, sy0+dy, sx1+dx, sy1+dy, geom)
+	vs := graphicsutil.QuadVertices(w, h, sx0+dx, sy0+dy, sx1+dx, sy1+dy, a, b, c, d, tx, ty)
 	i.backend.restorable.DrawImage(img.backend.restorable, vs, quadIndices, colorm, mode, filter)
 }
 

internal/shareable/shareable_test.go

@@ -45,15 +45,6 @@ func TestMain(m *testing.M) {
 
 const bigSize = 2049
 
-type geoM struct {
-	tx float32
-	ty float32
-}
-
-func (g *geoM) Elements() (a, b, c, d, tx, ty float32) {
-	return 1, 0, 0, 1, g.tx, g.ty
-}
-
 func TestEnsureNotShared(t *testing.T) {
 	// Create img1 and img2 with this size so that the next images are allocated
 	// with non-upper-left location.
@@ -93,8 +84,7 @@ func TestEnsureNotShared(t *testing.T) {
 		dy1 = size * 3 / 4
 	)
 	// img4.ensureNotShared() should be called.
-	geom := &geoM{size / 4, size / 4}
-	img4.DrawImage(img3, 0, 0, size/2, size/2, geom, nil, opengl.CompositeModeCopy, graphics.FilterNearest)
+	img4.DrawImage(img3, 0, 0, size/2, size/2, 1, 0, 0, 1, size/4, size/4, nil, opengl.CompositeModeCopy, graphics.FilterNearest)
 
 	for j := 0; j < size; j++ {
 		for i := 0; i < size; i++ {
@@ -115,5 +105,5 @@ func TestEnsureNotShared(t *testing.T) {
 
 	// Check further drawing doesn't cause panic.
 	// This bug was fixed by 03dcd948.
-	img4.DrawImage(img3, 0, 0, size/2, size/2, geom, nil, opengl.CompositeModeCopy, graphics.FilterNearest)
+	img4.DrawImage(img3, 0, 0, size/2, size/2, 1, 0, 0, 1, size/4, size/4, nil, opengl.CompositeModeCopy, graphics.FilterNearest)
 }