Builder class for SkLayerRasterizer.

gm/texteffects.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "gm.h"
 #include "SkBlurMask.h"
 #include "SkBlurMaskFilter.h"
 #include "SkReadBuffer.h"
 #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"
 
 static SkPathEffect* MakeDotEffect(SkScalar radius, const SkMatrix& matrix) {
     SkPath path;
     path.addCircle(0, 0, radius);
     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
 };
 
 #include "SkXfermode.h"
 
 static void apply_shader(SkPaint* paint, int index) {
     raster_proc proc = gRastProcs[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
     SkScalar dir[] = { SK_Scalar1, SK_Scalar1, SK_Scalar1 };
     paint->setMaskFilter(SkBlurMaskFilter::CreateEmboss(dir, SK_Scalar1/4, SkIntToScalar(4), SkIntToScalar(3)))->unref();
 #endif
     paint->setColor(SK_ColorBLUE);
 }
 
 class TextEffectsGM : public skiagm::GM {
@@ skipping 36 matching lines @@
     }
 
 private:
     typedef skiagm::GM INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static skiagm::GM* MyFactory(void*) { return new TextEffectsGM; }
 static skiagm::GMRegistry reg(MyFactory);