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      1 /*
      2  * Copyright 2012 Google Inc.
      3  *
      4  * Use of this source code is governed by a BSD-style license that can be
      5  * found in the LICENSE file.
      6  */
      7 
      8 #include "gm.h"
      9 #include "SkCanvas.h"
     10 #include "SkPaint.h"
     11 #include "SkRandom.h"
     12 #include "SkTemplates.h"
     13 
     14 class GetPosTextPathGM : public skiagm::GM {
     15 public:
     16     GetPosTextPathGM() {}
     17 
     18 protected:
     19     virtual uint32_t onGetFlags() const SK_OVERRIDE {
     20         return kSkipTiled_Flag;
     21     }
     22 
     23     SkString onShortName() {
     24         return SkString("getpostextpath");
     25     }
     26 
     27     SkISize onISize() { return SkISize::Make(480, 780); }
     28 
     29     static void strokePath(SkCanvas* canvas, const SkPath& path) {
     30         SkPaint paint;
     31         paint.setAntiAlias(true);
     32         paint.setColor(SK_ColorRED);
     33         paint.setStyle(SkPaint::kStroke_Style);
     34         canvas->drawPath(path, paint);
     35     }
     36 
     37     virtual void onDraw(SkCanvas* canvas) {
     38         // explicitly add spaces, to test a prev. bug
     39         const char* text = "Ham bur ge fons";
     40         int len = SkToInt(strlen(text));
     41         SkPath path;
     42 
     43         SkPaint paint;
     44         paint.setAntiAlias(true);
     45         paint.setTextSize(SkIntToScalar(48));
     46 
     47         canvas->translate(SkIntToScalar(10), SkIntToScalar(64));
     48 
     49         canvas->drawText(text, len, 0, 0, paint);
     50         paint.getTextPath(text, len, 0, 0, &path);
     51         strokePath(canvas, path);
     52         path.reset();
     53 
     54         SkAutoTArray<SkPoint>  pos(len);
     55         SkAutoTArray<SkScalar> widths(len);
     56         paint.getTextWidths(text, len, &widths[0]);
     57 
     58         SkLCGRandom rand;
     59         SkScalar x = SkIntToScalar(20);
     60         SkScalar y = SkIntToScalar(100);
     61         for (int i = 0; i < len; ++i) {
     62             pos[i].set(x, y + rand.nextSScalar1() * 24);
     63             x += widths[i];
     64         }
     65 
     66         canvas->translate(0, SkIntToScalar(64));
     67 
     68         canvas->drawPosText(text, len, &pos[0], paint);
     69         paint.getPosTextPath(text, len, &pos[0], &path);
     70         strokePath(canvas, path);
     71     }
     72 };
     73 
     74 //////////////////////////////////////////////////////////////////////////////
     75 
     76 static skiagm::GM* F(void*) { return new GetPosTextPathGM; }
     77 static skiagm::GMRegistry gR(F);
     78