parameterize tesselation params

samplecode/SamplePatch.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 "SampleCode.h"
 #include "SkView.h"
 #include "SkCanvas.h"
@@ skipping 188 matching lines @@
         t += dt;
         canvas->drawVertices(SkCanvas::kTriangleStrip_VertexMode, stripCount,
                              strip, doTextures ? tex : NULL,
                              doColors ? colors : NULL, NULL,
                              NULL, 0, paint);
     }
 }
 
 static void drawpatches(SkCanvas* canvas, const SkPaint& paint, int nu, int nv,
                         Patch* patch) {
-
     SkAutoCanvasRestore ar(canvas, true);
 
-    patch->draw(canvas, paint, 10, 10, false, false);
+    patch->draw(canvas, paint, nu, nv, false, false);
     canvas->translate(SkIntToScalar(180), 0);
-    patch->draw(canvas, paint, 10, 10, true, false);
+    patch->draw(canvas, paint, nu, nv, true, false);
     canvas->translate(SkIntToScalar(180), 0);
-    patch->draw(canvas, paint, 10, 10, false, true);
+    patch->draw(canvas, paint, nu, nv, false, true);
     canvas->translate(SkIntToScalar(180), 0);
-    patch->draw(canvas, paint, 10, 10, true, true);
+    patch->draw(canvas, paint, nu, nv, true, true);
 }
 
 const SkScalar DX = 20;
 const SkScalar DY = 0;
 
 class PatchView : public SampleView {
     SkShader*   fShader0;
     SkShader*   fShader1;
     SkIPoint    fSize0, fSize1;
     SkPoint     fPts[12];
@@ skipping 34 matching lines @@
     // overrides from SkEventSink
     virtual bool onQuery(SkEvent* evt)  {
         if (SampleCode::TitleQ(*evt)) {
             SampleCode::TitleR(evt, "Patch");
             return true;
         }
         return this->INHERITED::onQuery(evt);
     }
 
     virtual void onDrawContent(SkCanvas* canvas) {
+        const int nu = 10;
+        const int nv = 10;
+
         SkPaint paint;
         paint.setDither(true);
         paint.setFilterLevel(SkPaint::kLow_FilterLevel);
 
         canvas->translate(DX, DY);
 
         Patch   patch;
 
         paint.setShader(fShader0);
         if (fSize0.fX == 0) {
             fSize0.fX = 1;
         }
         if (fSize0.fY == 0) {
             fSize0.fY = 1;
         }
         patch.setBounds(fSize0.fX, fSize0.fY);
 
         patch.setPatch(fPts);
-        drawpatches(canvas, paint, 10, 10, &patch);
+        drawpatches(canvas, paint, nu, nv, &patch);
 
         paint.setShader(NULL);
         paint.setAntiAlias(true);
         paint.setStrokeWidth(SkIntToScalar(5));
         canvas->drawPoints(SkCanvas::kPoints_PointMode, SK_ARRAY_COUNT(fPts), fPts, paint);
 
         canvas->translate(0, SkIntToScalar(300));
 
         paint.setAntiAlias(false);
         paint.setShader(fShader1);
-        {
+        if (true) {
             SkMatrix m;
             m.setSkew(1, 0);
             SkShader* s = SkShader::CreateLocalMatrixShader(paint.getShader(), m);
             paint.setShader(s)->unref();
         }
-        {
+        if (true) {
             static int gAngle;
             SkMatrix m;
             m.setRotate(SkIntToScalar(gAngle++));
             SkShader* s = SkShader::CreateLocalMatrixShader(paint.getShader(), m);
             paint.setShader(s)->unref();
         }
         patch.setBounds(fSize1.fX, fSize1.fY);
-        drawpatches(canvas, paint, 10, 10, &patch);
+        drawpatches(canvas, paint, nu, nv, &patch);
 
         this->inval(NULL);
     }
 
     class PtClick : public Click {
     public:
         int fIndex;
         PtClick(SkView* view, int index) : Click(view), fIndex(index) {}
     };
 
@@ skipping 20 matching lines @@
     }
 
 private:
     typedef SampleView INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static SkView* MyFactory() { return new PatchView; }
 static SkViewRegister reg(MyFactory);