internal/graphics: unify QuadVertices

This is a preparation for adding members to Vertex.

Updates #2640

image.go

@@ -247,7 +247,7 @@ func (i *Image) DrawImage(img *Image, options *DrawImageOptions) {
 	colorm, cr, cg, cb, ca := colorMToScale(options.ColorM.affineColorM())
 	cr, cg, cb, ca = options.ColorScale.apply(cr, cg, cb, ca)
 	vs := i.ensureTmpVertices(4 * graphics.VertexFloatCount)
-	graphics.QuadVertices(vs, float32(sx0), float32(sy0), float32(sx1), float32(sy1), a, b, c, d, tx, ty, cr, cg, cb, ca)
+	graphics.QuadVerticesFromSrcAndMatrix(vs, float32(sx0), float32(sy0), float32(sx1), float32(sy1), a, b, c, d, tx, ty, cr, cg, cb, ca)
 	is := graphics.QuadIndices()
 
 	srcs := [graphics.ShaderSrcImageCount]*ui.Image{img.image}
@@ -829,7 +829,7 @@ func (i *Image) DrawRectShader(width, height int, shader *Shader, options *DrawR
 	vs := i.ensureTmpVertices(4 * graphics.VertexFloatCount)
 
 	// Do not use srcRegions[0].Dx() and srcRegions[0].Dy() as these might be empty.
-	graphics.QuadVertices(vs,
+	graphics.QuadVerticesFromSrcAndMatrix(vs,
 		float32(srcRegions[0].Min.X), float32(srcRegions[0].Min.Y),
 		float32(srcRegions[0].Min.X+width), float32(srcRegions[0].Min.Y+height),
 		a, b, c, d, tx, ty, cr, cg, cb, ca)

image_test.go

@@ -662,6 +662,59 @@ func BenchmarkDrawImage(b *testing.B) {
 	}
 }
 
+func BenchmarkDrawTriangles(b *testing.B) {
+	const w, h = 16, 16
+	img0 := ebiten.NewImage(w, h)
+	img1 := ebiten.NewImage(w, h)
+	op := &ebiten.DrawTrianglesOptions{}
+	vs := []ebiten.Vertex{
+		{
+			DstX:   0,
+			DstY:   0,
+			SrcX:   0,
+			SrcY:   0,
+			ColorR: 1,
+			ColorG: 1,
+			ColorB: 1,
+			ColorA: 1,
+		},
+		{
+			DstX:   w,
+			DstY:   0,
+			SrcX:   w,
+			SrcY:   0,
+			ColorR: 1,
+			ColorG: 1,
+			ColorB: 1,
+			ColorA: 1,
+		},
+		{
+			DstX:   0,
+			DstY:   h,
+			SrcX:   0,
+			SrcY:   h,
+			ColorR: 1,
+			ColorG: 1,
+			ColorB: 1,
+			ColorA: 1,
+		},
+		{
+			DstX:   w,
+			DstY:   h,
+			SrcX:   w,
+			SrcY:   h,
+			ColorR: 1,
+			ColorG: 1,
+			ColorB: 1,
+			ColorA: 1,
+		},
+	}
+	is := []uint16{0, 1, 2, 1, 2, 3}
+	for i := 0; i < b.N; i++ {
+		img0.DrawTriangles(vs, is, img1, op)
+	}
+}
+
 func TestImageLinearGraduation(t *testing.T) {
 	img0 := ebiten.NewImage(2, 2)
 	img0.WritePixels([]byte{

internal/atlas/image.go

@@ -43,16 +43,6 @@ func min(a, b int) int {
 	return b
 }
 
-// quadVertices returns vertices to render a quad. These values are passed to graphicscommand.Image.
-func quadVertices(dx0, dy0, dx1, dy1, sx0, sy0, sx1, sy1, cr, cg, cb, ca float32) []float32 {
-	return []float32{
-		dx0, dy0, sx0, sy0, cr, cg, cb, ca,
-		dx1, dy0, sx1, sy0, cr, cg, cb, ca,
-		dx0, dy1, sx0, sy1, cr, cg, cb, ca,
-		dx1, dy1, sx1, sy1, cr, cg, cb, ca,
-	}
-}
-
 func appendDeferred(f func()) {
 	deferredM.Lock()
 	defer deferredM.Unlock()
@@ -149,7 +139,8 @@ func (b *backend) extendIfNeeded(width, height int) {
 
 	srcs := [graphics.ShaderSrcImageCount]*graphicscommand.Image{b.image}
 	sw, sh := b.image.InternalSize()
-	vs := quadVertices(0, 0, float32(sw), float32(sh), 0, 0, float32(sw), float32(sh), 1, 1, 1, 1)
+	vs := make([]float32, 4*graphics.VertexFloatCount)
+	graphics.QuadVerticesFromDstAndSrc(vs, 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.ShaderSrcImageCount]image.Rectangle{}, NearestFilterShader.ensureShader(), nil, graphicsdriver.FillRuleFillAll)
@@ -174,7 +165,8 @@ func newClearedImage(width, height int, screen bool) *graphicscommand.Image {
 }
 
 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)
+	vs := make([]float32, 4*graphics.VertexFloatCount)
+	graphics.QuadVerticesFromDstAndSrc(vs, 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.ShaderSrcImageCount]*graphicscommand.Image{}, vs, is, graphicsdriver.BlendClear, region, [graphics.ShaderSrcImageCount]image.Rectangle{}, clearShader.ensureShader(), nil, graphicsdriver.FillRuleFillAll)
 }
@@ -353,7 +345,7 @@ func (i *Image) ensureIsolatedFromSource(backends []*backend) {
 
 	w, h := float32(i.width), float32(i.height)
 	vs := make([]float32, 4*graphics.VertexFloatCount)
-	graphics.QuadVertices(vs, 0, 0, w, h, 1, 0, 0, 1, 0, 0, 1, 1, 1, 1)
+	graphics.QuadVerticesFromSrcAndMatrix(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)
 
@@ -384,7 +376,7 @@ func (i *Image) putOnSourceBackend() {
 
 	w, h := float32(i.width), float32(i.height)
 	vs := make([]float32, 4*graphics.VertexFloatCount)
-	graphics.QuadVertices(vs, 0, 0, w, h, 1, 0, 0, 1, 0, 0, 1, 1, 1, 1)
+	graphics.QuadVerticesFromSrcAndMatrix(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.ShaderSrcImageCount]*Image{i}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderSrcImageCount]image.Rectangle{}, NearestFilterShader, nil, graphicsdriver.FillRuleFillAll)

internal/atlas/image_test.go

@@ -50,12 +50,9 @@ func quadVertices(sw, sh, x, y int, scalex float32) []float32 {
 	sy0 := float32(0)
 	sx1 := float32(sw)
 	sy1 := float32(sh)
-	return []float32{
-		dx0, dy0, sx0, sy0, 1, 1, 1, 1,
-		dx1, dy0, sx1, sy0, 1, 1, 1, 1,
-		dx0, dy1, sx0, sy1, 1, 1, 1, 1,
-		dx1, dy1, sx1, sy1, 1, 1, 1, 1,
-	}
+	vs := make([]float32, 4*graphics.VertexFloatCount)
+	graphics.QuadVerticesFromDstAndSrc(vs, dx0, dy0, dx1, dy1, sx0, sy0, sx1, sy1, 1, 1, 1, 1)
+	return vs
 }
 
 const bigSize = 2049

internal/buffered/image.go

@@ -246,45 +246,51 @@ func (i *Image) syncPixelsIfNeeded() {
 		cbf := float32(c[2]) / 0xff
 		caf := float32(c[3]) / 0xff
 
-		vs[graphics.VertexFloatCount*4*idx] = dx
-		vs[graphics.VertexFloatCount*4*idx+1] = dy
-		vs[graphics.VertexFloatCount*4*idx+2] = sx
-		vs[graphics.VertexFloatCount*4*idx+3] = sy
-		vs[graphics.VertexFloatCount*4*idx+4] = crf
-		vs[graphics.VertexFloatCount*4*idx+5] = cgf
-		vs[graphics.VertexFloatCount*4*idx+6] = cbf
-		vs[graphics.VertexFloatCount*4*idx+7] = caf
-		vs[graphics.VertexFloatCount*4*idx+8] = dx + 1
-		vs[graphics.VertexFloatCount*4*idx+9] = dy
-		vs[graphics.VertexFloatCount*4*idx+10] = sx + 1
-		vs[graphics.VertexFloatCount*4*idx+11] = sy
-		vs[graphics.VertexFloatCount*4*idx+12] = crf
-		vs[graphics.VertexFloatCount*4*idx+13] = cgf
-		vs[graphics.VertexFloatCount*4*idx+14] = cbf
-		vs[graphics.VertexFloatCount*4*idx+15] = caf
-		vs[graphics.VertexFloatCount*4*idx+16] = dx
-		vs[graphics.VertexFloatCount*4*idx+17] = dy + 1
-		vs[graphics.VertexFloatCount*4*idx+18] = sx
-		vs[graphics.VertexFloatCount*4*idx+19] = sy + 1
-		vs[graphics.VertexFloatCount*4*idx+20] = crf
-		vs[graphics.VertexFloatCount*4*idx+21] = cgf
-		vs[graphics.VertexFloatCount*4*idx+22] = cbf
-		vs[graphics.VertexFloatCount*4*idx+23] = caf
-		vs[graphics.VertexFloatCount*4*idx+24] = dx + 1
-		vs[graphics.VertexFloatCount*4*idx+25] = dy + 1
-		vs[graphics.VertexFloatCount*4*idx+26] = sx + 1
-		vs[graphics.VertexFloatCount*4*idx+27] = sy + 1
-		vs[graphics.VertexFloatCount*4*idx+28] = crf
-		vs[graphics.VertexFloatCount*4*idx+29] = cgf
-		vs[graphics.VertexFloatCount*4*idx+30] = cbf
-		vs[graphics.VertexFloatCount*4*idx+31] = caf
+		vidx := 4 * idx
+		iidx := 6 * idx
 
-		is[6*idx] = uint32(4 * idx)
-		is[6*idx+1] = uint32(4*idx + 1)
-		is[6*idx+2] = uint32(4*idx + 2)
-		is[6*idx+3] = uint32(4*idx + 1)
-		is[6*idx+4] = uint32(4*idx + 2)
-		is[6*idx+5] = uint32(4*idx + 3)
+		vs[graphics.VertexFloatCount*vidx] = dx
+		vs[graphics.VertexFloatCount*vidx+1] = dy
+		vs[graphics.VertexFloatCount*vidx+2] = sx
+		vs[graphics.VertexFloatCount*vidx+3] = sy
+		vs[graphics.VertexFloatCount*vidx+4] = crf
+		vs[graphics.VertexFloatCount*vidx+5] = cgf
+		vs[graphics.VertexFloatCount*vidx+6] = cbf
+		vs[graphics.VertexFloatCount*vidx+7] = caf
+
+		vs[graphics.VertexFloatCount*(vidx+1)] = dx + 1
+		vs[graphics.VertexFloatCount*(vidx+1)+1] = dy
+		vs[graphics.VertexFloatCount*(vidx+1)+2] = sx + 1
+		vs[graphics.VertexFloatCount*(vidx+1)+3] = sy
+		vs[graphics.VertexFloatCount*(vidx+1)+4] = crf
+		vs[graphics.VertexFloatCount*(vidx+1)+5] = cgf
+		vs[graphics.VertexFloatCount*(vidx+1)+6] = cbf
+		vs[graphics.VertexFloatCount*(vidx+1)+7] = caf
+
+		vs[graphics.VertexFloatCount*(vidx+2)] = dx
+		vs[graphics.VertexFloatCount*(vidx+2)+1] = dy + 1
+		vs[graphics.VertexFloatCount*(vidx+2)+2] = sx
+		vs[graphics.VertexFloatCount*(vidx+2)+3] = sy + 1
+		vs[graphics.VertexFloatCount*(vidx+2)+4] = crf
+		vs[graphics.VertexFloatCount*(vidx+2)+5] = cgf
+		vs[graphics.VertexFloatCount*(vidx+2)+6] = cbf
+		vs[graphics.VertexFloatCount*(vidx+2)+7] = caf
+
+		vs[graphics.VertexFloatCount*(vidx+3)] = dx + 1
+		vs[graphics.VertexFloatCount*(vidx+3)+1] = dy + 1
+		vs[graphics.VertexFloatCount*(vidx+3)+2] = sx + 1
+		vs[graphics.VertexFloatCount*(vidx+3)+3] = sy + 1
+		vs[graphics.VertexFloatCount*(vidx+3)+4] = crf
+		vs[graphics.VertexFloatCount*(vidx+3)+5] = cgf
+		vs[graphics.VertexFloatCount*(vidx+3)+6] = cbf
+		vs[graphics.VertexFloatCount*(vidx+3)+7] = caf
+
+		is[iidx] = uint32(vidx)
+		is[iidx+1] = uint32(vidx + 1)
+		is[iidx+2] = uint32(vidx + 2)
+		is[iidx+3] = uint32(vidx + 1)
+		is[iidx+4] = uint32(vidx + 2)
+		is[iidx+5] = uint32(vidx + 3)
 
 		idx++
 	}

internal/buffered/image_test.go

@@ -52,7 +52,7 @@ func TestUnsyncedPixels(t *testing.T) {
 	// Flush unsynced pixel cache.
 	src := buffered.NewImage(16, 16, atlas.ImageTypeRegular)
 	vs := make([]float32, 4*graphics.VertexFloatCount)
-	graphics.QuadVertices(vs, 0, 0, 16, 16, 1, 0, 0, 1, 0, 0, 1, 1, 1, 1)
+	graphics.QuadVerticesFromSrcAndMatrix(vs, 0, 0, 16, 16, 1, 0, 0, 1, 0, 0, 1, 1, 1, 1)
 	is := graphics.QuadIndices()
 	dr := image.Rect(0, 0, 16, 16)
 	sr := [graphics.ShaderSrcImageCount]image.Rectangle{image.Rect(0, 0, 16, 16)}

internal/graphics/vertex.go

@@ -50,16 +50,16 @@ func QuadIndices() []uint32 {
 	return quadIndices
 }
 
-// QuadVertices sets a float32 slice for a quadrangle.
-// QuadVertices sets a slice that never overlaps with other slices returned this function,
-// and users can do optimization based on this fact.
-func QuadVertices(dst []float32, sx0, sy0, sx1, sy1 float32, a, b, c, d, tx, ty float32, cr, cg, cb, ca float32) {
+// QuadVerticesFromSrcAndMatrix sets a float32 slice for a quadrangle.
+func QuadVerticesFromSrcAndMatrix(dst []float32, sx0, sy0, sx1, sy1 float32, a, b, c, d, tx, ty float32, cr, cg, cb, ca float32) {
 	x := sx1 - sx0
 	y := sy1 - sy0
 	ax, by, cx, dy := a*x, b*y, c*x, d*y
 	u0, v0, u1, v1 := sx0, sy0, sx1, sy1
 
 	// This function is very performance-sensitive and implement in a very dumb way.
+
+	// Remove the boundary check.
 	dst = dst[:4*VertexFloatCount]
 
 	dst[0] = adjustDestinationPixel(tx)
@@ -71,32 +71,79 @@ func QuadVertices(dst []float32, sx0, sy0, sx1, sy1 float32, a, b, c, d, tx, ty
 	dst[6] = cb
 	dst[7] = ca
 
-	dst[8] = adjustDestinationPixel(ax + tx)
-	dst[9] = adjustDestinationPixel(cx + ty)
-	dst[10] = u1
-	dst[11] = v0
-	dst[12] = cr
-	dst[13] = cg
-	dst[14] = cb
-	dst[15] = ca
+	dst[VertexFloatCount] = adjustDestinationPixel(ax + tx)
+	dst[VertexFloatCount+1] = adjustDestinationPixel(cx + ty)
+	dst[VertexFloatCount+2] = u1
+	dst[VertexFloatCount+3] = v0
+	dst[VertexFloatCount+4] = cr
+	dst[VertexFloatCount+5] = cg
+	dst[VertexFloatCount+6] = cb
+	dst[VertexFloatCount+7] = ca
 
-	dst[16] = adjustDestinationPixel(by + tx)
-	dst[17] = adjustDestinationPixel(dy + ty)
-	dst[18] = u0
-	dst[19] = v1
-	dst[20] = cr
-	dst[21] = cg
-	dst[22] = cb
-	dst[23] = ca
+	dst[2*VertexFloatCount] = adjustDestinationPixel(by + tx)
+	dst[2*VertexFloatCount+1] = adjustDestinationPixel(dy + ty)
+	dst[2*VertexFloatCount+2] = u0
+	dst[2*VertexFloatCount+3] = v1
+	dst[2*VertexFloatCount+4] = cr
+	dst[2*VertexFloatCount+5] = cg
+	dst[2*VertexFloatCount+6] = cb
+	dst[2*VertexFloatCount+7] = ca
 
-	dst[24] = adjustDestinationPixel(ax + by + tx)
-	dst[25] = adjustDestinationPixel(cx + dy + ty)
-	dst[26] = u1
-	dst[27] = v1
-	dst[28] = cr
-	dst[29] = cg
-	dst[30] = cb
-	dst[31] = ca
+	dst[3*VertexFloatCount] = adjustDestinationPixel(ax + by + tx)
+	dst[3*VertexFloatCount+1] = adjustDestinationPixel(cx + dy + ty)
+	dst[3*VertexFloatCount+2] = u1
+	dst[3*VertexFloatCount+3] = v1
+	dst[3*VertexFloatCount+4] = cr
+	dst[3*VertexFloatCount+5] = cg
+	dst[3*VertexFloatCount+6] = cb
+	dst[3*VertexFloatCount+7] = ca
+}
+
+// QuadVerticesFromDstAndSrc sets a float32 slice for a quadrangle.
+func QuadVerticesFromDstAndSrc(dst []float32, dx0, dy0, dx1, dy1, sx0, sy0, sx1, sy1, cr, cg, cb, ca float32) {
+	dx0 = adjustDestinationPixel(dx0)
+	dy0 = adjustDestinationPixel(dy0)
+	dx1 = adjustDestinationPixel(dx1)
+	dy1 = adjustDestinationPixel(dy1)
+
+	// Remove the boundary check.
+	dst = dst[:4*VertexFloatCount]
+
+	dst[0] = dx0
+	dst[1] = dy0
+	dst[2] = sx0
+	dst[3] = sy0
+	dst[4] = cr
+	dst[5] = cg
+	dst[6] = cb
+	dst[7] = ca
+
+	dst[VertexFloatCount] = dx1
+	dst[VertexFloatCount+1] = dy0
+	dst[VertexFloatCount+2] = sx1
+	dst[VertexFloatCount+3] = sy0
+	dst[VertexFloatCount+4] = cr
+	dst[VertexFloatCount+5] = cg
+	dst[VertexFloatCount+6] = cb
+	dst[VertexFloatCount+7] = ca
+
+	dst[2*VertexFloatCount] = dx0
+	dst[2*VertexFloatCount+1] = dy1
+	dst[2*VertexFloatCount+2] = sx0
+	dst[2*VertexFloatCount+3] = sy1
+	dst[2*VertexFloatCount+4] = cr
+	dst[2*VertexFloatCount+5] = cg
+	dst[2*VertexFloatCount+6] = cb
+	dst[2*VertexFloatCount+7] = ca
+
+	dst[3*VertexFloatCount] = dx1
+	dst[3*VertexFloatCount+1] = dy1
+	dst[3*VertexFloatCount+2] = sx1
+	dst[3*VertexFloatCount+3] = sy1
+	dst[3*VertexFloatCount+4] = cr
+	dst[3*VertexFloatCount+5] = cg
+	dst[3*VertexFloatCount+6] = cb
+	dst[3*VertexFloatCount+7] = ca
 }
 
 func adjustDestinationPixel(x float32) float32 {

internal/graphicscommand/command.go

@@ -183,9 +183,9 @@ func dstRegionFromVertices(vertices []float32) (minX, minY, maxX, maxY float32)
 	maxX = negInf32
 	maxY = negInf32
 
-	for i := 0; i < len(vertices)/graphics.VertexFloatCount; i++ {
-		x := vertices[graphics.VertexFloatCount*i]
-		y := vertices[graphics.VertexFloatCount*i+1]
+	for i := 0; i < len(vertices); i += graphics.VertexFloatCount {
+		x := vertices[i]
+		y := vertices[i+1]
 		if x < minX {
 			minX = x
 		}

internal/graphicscommand/image_test.go

@@ -43,12 +43,9 @@ func TestMain(m *testing.M) {
 }
 
 func quadVertices(w, h float32) []float32 {
-	return []float32{
-		0, 0, 0, 0, 1, 1, 1, 1,
-		w, 0, w, 0, 1, 1, 1, 1,
-		0, w, 0, h, 1, 1, 1, 1,
-		w, h, w, h, 1, 1, 1, 1,
-	}
+	vs := make([]float32, 8*graphics.VertexFloatCount)
+	graphics.QuadVerticesFromDstAndSrc(vs, 0, 0, w, h, 0, 0, w, h, 1, 1, 1, 1)
+	return vs
 }
 
 func TestClear(t *testing.T) {

internal/graphicsdriver/opengl/graphics_debug.go

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//go:build ebitenginegldebug
+//go:build !playstation5 && ebitenginegldebug
 
 package opengl
 

internal/graphicsdriver/opengl/graphics_notdebug.go

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//go:build !ebitenginegldebug
+//go:build !playstation5 && !ebitenginegldebug
 
 package opengl
 

internal/mipmap/mipmap.go

@@ -73,20 +73,22 @@ func (m *Mipmap) DrawTriangles(srcs [graphics.ShaderSrcImageCount]*Mipmap, verti
 	level := 0
 	if !canSkipMipmap && srcs[0] != nil && canUseMipmap(srcs[0].imageType) {
 		level = math.MaxInt32
-		for i := 0; i < len(indices)/3; i++ {
-			const n = graphics.VertexFloatCount
-			dx0 := vertices[n*indices[3*i]+0]
-			dy0 := vertices[n*indices[3*i]+1]
-			sx0 := vertices[n*indices[3*i]+2]
-			sy0 := vertices[n*indices[3*i]+3]
-			dx1 := vertices[n*indices[3*i+1]+0]
-			dy1 := vertices[n*indices[3*i+1]+1]
-			sx1 := vertices[n*indices[3*i+1]+2]
-			sy1 := vertices[n*indices[3*i+1]+3]
-			dx2 := vertices[n*indices[3*i+2]+0]
-			dy2 := vertices[n*indices[3*i+2]+1]
-			sx2 := vertices[n*indices[3*i+2]+2]
-			sy2 := vertices[n*indices[3*i+2]+3]
+		for i := 0; i < len(indices); i += 3 {
+			idx0 := indices[i]
+			idx1 := indices[i+1]
+			idx2 := indices[i+2]
+			dx0 := vertices[graphics.VertexFloatCount*idx0]
+			dy0 := vertices[graphics.VertexFloatCount*idx0+1]
+			sx0 := vertices[graphics.VertexFloatCount*idx0+2]
+			sy0 := vertices[graphics.VertexFloatCount*idx0+3]
+			dx1 := vertices[graphics.VertexFloatCount*idx1]
+			dy1 := vertices[graphics.VertexFloatCount*idx1+1]
+			sx1 := vertices[graphics.VertexFloatCount*idx1+2]
+			sy1 := vertices[graphics.VertexFloatCount*idx1+3]
+			dx2 := vertices[graphics.VertexFloatCount*idx2]
+			dy2 := vertices[graphics.VertexFloatCount*idx2+1]
+			sx2 := vertices[graphics.VertexFloatCount*idx2+2]
+			sy2 := vertices[graphics.VertexFloatCount*idx2+3]
 			if l := mipmapLevelFromDistance(dx0, dy0, dx1, dy1, sx0, sy0, sx1, sy1); level > l {
 				level = l
 			}
@@ -109,11 +111,10 @@ func (m *Mipmap) DrawTriangles(srcs [graphics.ShaderSrcImageCount]*Mipmap, verti
 		}
 		if level != 0 {
 			if img := src.level(level); img != nil {
-				const n = graphics.VertexFloatCount
 				s := float32(pow2(level))
-				for i := 0; i < len(vertices)/n; i++ {
-					vertices[i*n+2] /= s
-					vertices[i*n+3] /= s
+				for i := 0; i < len(vertices); i += graphics.VertexFloatCount {
+					vertices[i+2] /= s
+					vertices[i+3] /= s
 				}
 				imgs[i] = img
 				continue
@@ -148,12 +149,10 @@ func (m *Mipmap) level(level int) *buffered.Image {
 
 	var src *buffered.Image
 	vs := make([]float32, 4*graphics.VertexFloatCount)
-	shader := atlas.NearestFilterShader
 	switch {
 	case level == 1:
 		src = m.orig
-		graphics.QuadVertices(vs, 0, 0, float32(m.width), float32(m.height), 0.5, 0, 0, 0.5, 0, 0, 1, 1, 1, 1)
-		shader = atlas.LinearFilterShader
+		graphics.QuadVerticesFromSrcAndMatrix(vs, 0, 0, float32(m.width), float32(m.height), 0.5, 0, 0, 0.5, 0, 0, 1, 1, 1, 1)
 	case level > 1:
 		src = m.level(level - 1)
 		if src == nil {
@@ -162,8 +161,7 @@ func (m *Mipmap) level(level int) *buffered.Image {
 		}
 		w := sizeForLevel(m.width, level-1)
 		h := sizeForLevel(m.height, level-1)
-		graphics.QuadVertices(vs, 0, 0, float32(w), float32(h), 0.5, 0, 0, 0.5, 0, 0, 1, 1, 1, 1)
-		shader = atlas.LinearFilterShader
+		graphics.QuadVerticesFromSrcAndMatrix(vs, 0, 0, float32(w), float32(h), 0.5, 0, 0, 0.5, 0, 0, 1, 1, 1, 1)
 	default:
 		panic(fmt.Sprintf("mipmap: invalid level: %d", level))
 	}
@@ -186,7 +184,7 @@ 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.ShaderSrcImageCount]*buffered.Image{src}, vs, is, graphicsdriver.BlendCopy, dstRegion, [graphics.ShaderSrcImageCount]image.Rectangle{}, shader, nil, graphicsdriver.FillRuleFillAll)
+	s.DrawTriangles([graphics.ShaderSrcImageCount]*buffered.Image{src}, vs, is, graphicsdriver.BlendCopy, dstRegion, [graphics.ShaderSrcImageCount]image.Rectangle{}, atlas.LinearFilterShader, nil, graphicsdriver.FillRuleFillAll)
 	m.setImg(level, s)
 
 	return m.imgs[level]

internal/ui/image.go

@@ -158,7 +158,7 @@ func (i *Image) Fill(r, g, b, a float32, region image.Rectangle) {
 		i.tmpVerticesForFill = make([]float32, 4*graphics.VertexFloatCount)
 	}
 	// i.tmpVerticesForFill can be reused as this is sent to DrawTriangles immediately.
-	graphics.QuadVertices(
+	graphics.QuadVerticesFromSrcAndMatrix(
 		i.tmpVerticesForFill,
 		1, 1, float32(i.ui.whiteImage.width-1), float32(i.ui.whiteImage.height-1),
 		float32(i.width), 0, 0, float32(i.height), 0, 0,
@@ -235,7 +235,7 @@ func (i *bigOffscreenImage) drawTriangles(srcs [graphics.ShaderSrcImageCount]*Im
 			i.tmpVerticesForCopying = make([]float32, 4*graphics.VertexFloatCount)
 		}
 		// i.tmpVerticesForCopying can be reused as this is sent to DrawTriangles immediately.
-		graphics.QuadVertices(
+		graphics.QuadVerticesFromSrcAndMatrix(
 			i.tmpVerticesForCopying,
 			float32(i.region.Min.X), float32(i.region.Min.Y), float32(i.region.Max.X), float32(i.region.Max.Y),
 			bigOffscreenScale, 0, 0, bigOffscreenScale, 0, 0,
@@ -279,7 +279,7 @@ func (i *bigOffscreenImage) flush() {
 		i.tmpVerticesForFlushing = make([]float32, 4*graphics.VertexFloatCount)
 	}
 	// i.tmpVerticesForFlushing can be reused as this is sent to DrawTriangles in this function.
-	graphics.QuadVertices(
+	graphics.QuadVerticesFromSrcAndMatrix(
 		i.tmpVerticesForFlushing,
 		0, 0, float32(i.region.Dx()*bigOffscreenScale), float32(i.region.Dy()*bigOffscreenScale),
 		1.0/bigOffscreenScale, 0, 0, 1.0/bigOffscreenScale, float32(i.region.Min.X), float32(i.region.Min.Y),