gpu/internal/rendertest: allow nil pixel check functions

Signed-off-by: Elias Naur <mail@eliasnaur.com>

gpu/internal/rendertest/clip_test.go

@@ -132,8 +132,7 @@ func TestTexturedStrokeClipped(t *testing.T) {
 		defer clip.RRect{Rect: image.Rect(-30, -30, 60, 60)}.Push(o).Pop()
 		defer op.Offset(image.Pt(-10, -10)).Push(o).Pop()
 		paint.PaintOp{}.Add(o)
-	}, func(r result) {
-	})
+	}, nil)
 }
 
 func TestTexturedStroke(t *testing.T) {
@@ -146,8 +145,7 @@ func TestTexturedStroke(t *testing.T) {
 		}.Op().Push(o).Pop()
 		defer op.Offset(image.Pt(-10, -10)).Push(o).Pop()
 		paint.PaintOp{}.Add(o)
-	}, func(r result) {
-	})
+	}, nil)
 }
 
 func TestPaintClippedTexture(t *testing.T) {
@@ -252,8 +250,7 @@ func TestPathReuse(t *testing.T) {
 		stroke := clip.Stroke{Path: spec, Width: 3}.Op().Push(o)
 		paint.Fill(o, color.NRGBA{B: 0xFF, A: 0xFF})
 		stroke.Pop()
-	}, func(r result) {
-	})
+	}, nil)
 }
 
 func TestPathInterleave(t *testing.T) {
@@ -290,8 +287,7 @@ func TestStrokedRect(t *testing.T) {
 				Width: 5,
 			}.Op(),
 		)
-	}, func(r result) {
-	})
+	}, nil)
 }
 
 func TestInstancedRects(t *testing.T) {

gpu/internal/rendertest/render_test.go

@@ -124,8 +124,7 @@ func TestDeferredPaint(t *testing.T) {
 		defer clip.Rect(image.Rect(0, 0, 80, 80)).Op().Push(o).Pop()
 		paint.ColorOp{Color: color.NRGBA{A: 0x60, B: 0xff}}.Add(o)
 		paint.PaintOp{}.Add(o)
-	}, func(r result) {
-	})
+	}, nil)
 }
 
 func constSqPath() clip.Op {
@@ -323,7 +322,7 @@ func TestLinearGradientAngled(t *testing.T) {
 		cl = clip.Rect(image.Rect(0, 64, 64, 128)).Push(ops)
 		paint.PaintOp{}.Add(ops)
 		cl.Pop()
-	}, func(r result) {})
+	}, nil)
 }
 
 func TestZeroImage(t *testing.T) {
@@ -492,8 +491,7 @@ func TestOpacity(t *testing.T) {
 		opc3 := paint.PushOpacity(ops, .6)
 		paint.FillShape(ops, color.NRGBA{B: 255, A: 255}, clip.Ellipse(image.Rectangle{Min: image.Pt(20+20, 10), Max: image.Pt(50+64, 128)}).Op(ops))
 		opc3.Pop()
-	}, func(r result) {
-	})
+	}, nil)
 }
 
 // lerp calculates linear interpolation with color b and p.

gpu/internal/rendertest/util_test.go

@@ -90,7 +90,9 @@ func run(t *testing.T, f func(o *op.Ops), c func(r result)) {
 			name := fmt.Sprintf("%s-%d-bad.png", t.Name(), i)
 			saveImage(t, name, img)
 		}
-		c(result{t: t, img: img})
+		if c != nil {
+			c(result{t: t, img: img})
+		}
 	}
 }