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      1 /*
      2  * Copyright 2011 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 #include "gm.h"
      8 #include "SkTypeface.h"
      9 
     10 namespace skiagm {
     11 
     12 class FontScalerGM : public GM {
     13 public:
     14     FontScalerGM() {
     15         this->setBGColor(0xFFFFFFFF);
     16     }
     17 
     18     virtual ~FontScalerGM() {
     19     }
     20 
     21 protected:
     22     virtual SkString onShortName() {
     23         return SkString("fontscaler");
     24     }
     25 
     26     virtual SkISize onISize() {
     27         return make_isize(1450, 750);
     28     }
     29 
     30     static void rotate_about(SkCanvas* canvas,
     31                              SkScalar degrees,
     32                              SkScalar px, SkScalar py) {
     33         canvas->translate(px, py);
     34         canvas->rotate(degrees);
     35         canvas->translate(-px, -py);
     36     }
     37 
     38     virtual void onDraw(SkCanvas* canvas) {
     39         SkPaint paint;
     40 
     41         paint.setAntiAlias(true);
     42         paint.setLCDRenderText(true);
     43         //With freetype the default (normal hinting) can be really ugly.
     44         //Most distros now set slight (vertical hinting only) in any event.
     45         paint.setHinting(SkPaint::kSlight_Hinting);
     46         SkSafeUnref(paint.setTypeface(SkTypeface::CreateFromName("Times Roman", SkTypeface::kNormal)));
     47 
     48         const char* text = "Hamburgefons ooo mmm";
     49         const size_t textLen = strlen(text);
     50 
     51         for (int j = 0; j < 2; ++j) {
     52             // This used to do 6 iterations but it causes the N4 to crash in the MSAA4 config.
     53             for (int i = 0; i < 5; ++i) {
     54                 SkScalar x = SkIntToScalar(10);
     55                 SkScalar y = SkIntToScalar(20);
     56 
     57                 SkAutoCanvasRestore acr(canvas, true);
     58                 canvas->translate(SkIntToScalar(50 + i * 230),
     59                                   SkIntToScalar(20));
     60                 rotate_about(canvas, SkIntToScalar(i * 5), x, y * 10);
     61 
     62                 {
     63                     SkPaint p;
     64                     p.setAntiAlias(true);
     65                     SkRect r;
     66                     r.set(x - SkIntToScalar(3), SkIntToScalar(15),
     67                           x - SkIntToScalar(1), SkIntToScalar(280));
     68                     canvas->drawRect(r, p);
     69                 }
     70 
     71                 int index = 0;
     72                 for (int ps = 6; ps <= 22; ps++) {
     73                     paint.setTextSize(SkIntToScalar(ps));
     74                     canvas->drawText(text, textLen, x, y, paint);
     75                     y += paint.getFontMetrics(NULL);
     76                     index += 1;
     77                 }
     78             }
     79             canvas->translate(0, SkIntToScalar(360));
     80             paint.setSubpixelText(true);
     81         }
     82     }
     83 
     84 private:
     85     typedef GM INHERITED;
     86 };
     87 
     88 //////////////////////////////////////////////////////////////////////////////
     89 
     90 static GM* MyFactory(void*) { return new FontScalerGM; }
     91 static GMRegistry reg(MyFactory);
     92 
     93 }
     94