Builder class for SkLayerRasterizer.

gm/texteffects.cpp

Index: gm/texteffects.cpp
diff --git a/gm/texteffects.cpp b/gm/texteffects.cpp
index cf9ec5accc3308be438e3c01bce8e1bd9d44d47e..eb7accbb2718faad59b9ce259b7f2c68f0c9e645 100644
--- a/gm/texteffects.cpp
+++ b/gm/texteffects.cpp
@@ -12,85 +12,85 @@
 #include "SkWriteBuffer.h"
 #include "SkLayerRasterizer.h"
 
-static void r0(SkLayerRasterizer* rast, SkPaint& p) {
+static void r0(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p) {
     p.setMaskFilter(SkBlurMaskFilter::Create(SkBlurMaskFilter::kNormal_BlurStyle,
                               SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(3))))->unref();
-    rast->addLayer(p, SkIntToScalar(3), SkIntToScalar(3));
+    rastBuilder->addLayer(p, SkIntToScalar(3), SkIntToScalar(3));
 
     p.setMaskFilter(NULL);
     p.setStyle(SkPaint::kStroke_Style);
     p.setStrokeWidth(SK_Scalar1);
-    rast->addLayer(p);
+    rastBuilder->addLayer(p);
 
     p.setAlpha(0x11);
     p.setStyle(SkPaint::kFill_Style);
     p.setXfermodeMode(SkXfermode::kSrc_Mode);
-    rast->addLayer(p);
+    rastBuilder->addLayer(p);
 }
 
-static void r1(SkLayerRasterizer* rast, SkPaint& p) {
-    rast->addLayer(p);
+static void r1(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p) {
+    rastBuilder->addLayer(p);
 
     p.setAlpha(0x40);
     p.setXfermodeMode(SkXfermode::kSrc_Mode);
     p.setStyle(SkPaint::kStroke_Style);
     p.setStrokeWidth(SK_Scalar1*2);
-    rast->addLayer(p);
+    rastBuilder->addLayer(p);
 }
 
-static void r2(SkLayerRasterizer* rast, SkPaint& p) {
+static void r2(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p) {
     p.setStyle(SkPaint::kStrokeAndFill_Style);
     p.setStrokeWidth(SK_Scalar1*4);
-    rast->addLayer(p);
+    rastBuilder->addLayer(p);
 
     p.setStyle(SkPaint::kStroke_Style);
     p.setStrokeWidth(SK_Scalar1*3/2);
     p.setXfermodeMode(SkXfermode::kClear_Mode);
-    rast->addLayer(p);
+    rastBuilder->addLayer(p);
 }
 
-static void r3(SkLayerRasterizer* rast, SkPaint& p) {
+static void r3(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p) {
     p.setStyle(SkPaint::kStroke_Style);
     p.setStrokeWidth(SK_Scalar1*3);
-    rast->addLayer(p);
+    rastBuilder->addLayer(p);
 
     p.setAlpha(0x20);
     p.setStyle(SkPaint::kFill_Style);
     p.setXfermodeMode(SkXfermode::kSrc_Mode);
-    rast->addLayer(p);
+    rastBuilder->addLayer(p);
 }
 
-static void r4(SkLayerRasterizer* rast, SkPaint& p) {
+static void r4(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p) {
     p.setAlpha(0x60);
-    rast->addLayer(p, SkIntToScalar(3), SkIntToScalar(3));
+    rastBuilder->addLayer(p, SkIntToScalar(3), SkIntToScalar(3));
 
     p.setAlpha(0xFF);
     p.setXfermodeMode(SkXfermode::kClear_Mode);
-    rast->addLayer(p, SK_Scalar1*3/2, SK_Scalar1*3/2);
+    rastBuilder->addLayer(p, SK_Scalar1*3/2, SK_Scalar1*3/2);
 
     p.setXfermode(NULL);
-    rast->addLayer(p);
+    rastBuilder->addLayer(p);
 }
 
 #include "SkDiscretePathEffect.h"
 
-static void r5(SkLayerRasterizer* rast, SkPaint& p) {
-    rast->addLayer(p);
+static void r5(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p) {
+    rastBuilder->addLayer(p);
 
     p.setPathEffect(SkDiscretePathEffect::Create(SK_Scalar1*4, SK_Scalar1*3))->unref();
     p.setXfermodeMode(SkXfermode::kSrcOut_Mode);
-    rast->addLayer(p);
+    rastBuilder->addLayer(p);
 }
 
-static void r6(SkLayerRasterizer* rast, SkPaint& p) {
-    rast->addLayer(p);
+static void r6(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p) {
+    rastBuilder->addLayer(p);
 
     p.setAntiAlias(false);
-    SkLayerRasterizer* rast2 = new SkLayerRasterizer;
-    r5(rast2, p);
-    p.setRasterizer(rast2)->unref();
+    SkLayerRasterizer::Builder rastBuilder2;
+    r5(&rastBuilder2, p);
+    p.setRasterizer(rastBuilder2.detachRasterizer())->unref();
     p.setXfermodeMode(SkXfermode::kClear_Mode);
-    rast->addLayer(p);
+    rastBuilder->addLayer(p);
 }
 
 #include "Sk2DPathEffect.h"
@@ -101,49 +101,49 @@ static SkPathEffect* MakeDotEffect(SkScalar radius, const SkMatrix& matrix) {
     return SkPath2DPathEffect::Create(matrix, path);
 }
 
-static void r7(SkLayerRasterizer* rast, SkPaint& p) {
+static void r7(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p) {
     SkMatrix    lattice;
     lattice.setScale(SK_Scalar1*6, SK_Scalar1*6, 0, 0);
     lattice.postSkew(SK_Scalar1/3, 0, 0, 0);
     p.setPathEffect(MakeDotEffect(SK_Scalar1*4, lattice))->unref();
-    rast->addLayer(p);
+    rastBuilder->addLayer(p);
 }
 
-static void r8(SkLayerRasterizer* rast, SkPaint& p) {
-    rast->addLayer(p);
+static void r8(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p) {
+    rastBuilder->addLayer(p);
 
     SkMatrix    lattice;
     lattice.setScale(SK_Scalar1*6, SK_Scalar1*6, 0, 0);
     lattice.postSkew(SK_Scalar1/3, 0, 0, 0);
     p.setPathEffect(MakeDotEffect(SK_Scalar1*2, lattice))->unref();
     p.setXfermodeMode(SkXfermode::kClear_Mode);
-    rast->addLayer(p);
+    rastBuilder->addLayer(p);
 
     p.setPathEffect(NULL);
     p.setXfermode(NULL);
     p.setStyle(SkPaint::kStroke_Style);
     p.setStrokeWidth(SK_Scalar1);
-    rast->addLayer(p);
+    rastBuilder->addLayer(p);
 }
 
-static void r9(SkLayerRasterizer* rast, SkPaint& p) {
-    rast->addLayer(p);
+static void r9(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p) {
+    rastBuilder->addLayer(p);
 
     SkMatrix    lattice;
     lattice.setScale(SK_Scalar1, SK_Scalar1*6, 0, 0);
     lattice.postRotate(SkIntToScalar(30), 0, 0);
     p.setPathEffect(SkLine2DPathEffect::Create(SK_Scalar1*2, lattice))->unref();
     p.setXfermodeMode(SkXfermode::kClear_Mode);
-    rast->addLayer(p);
+    rastBuilder->addLayer(p);
 
     p.setPathEffect(NULL);
     p.setXfermode(NULL);
     p.setStyle(SkPaint::kStroke_Style);
     p.setStrokeWidth(SK_Scalar1);
-    rast->addLayer(p);
+    rastBuilder->addLayer(p);
 }
 
-typedef void (*raster_proc)(SkLayerRasterizer*, SkPaint&);
+typedef void (*raster_proc)(SkLayerRasterizer::Builder*, SkPaint&);
 
 static const raster_proc gRastProcs[] = {
     r0, r1, r2, r3, r4, r5, r6, r7, r8, r9
@@ -156,11 +156,11 @@ static void apply_shader(SkPaint* paint, int index) {
     if (proc)
     {
         SkPaint p;
-        SkLayerRasterizer*  rast = new SkLayerRasterizer;
+        SkLayerRasterizer::Builder rastBuilder;
 
         p.setAntiAlias(true);
-        proc(rast, p);
-        paint->setRasterizer(rast)->unref();
+        proc(&rastBuilder, p);
+        paint->setRasterizer(rastBuilder.detachRasterizer())->unref();
     }
 
 #if 0