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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 
     23     SkString onShortName() override {
     24         return SkString("fontscaler");
     25     }
     26 
     27     SkISize onISize() override {
     28         return SkISize::Make(1450, 750);
     29     }
     30 
     31     static void rotate_about(SkCanvas* canvas,
     32                              SkScalar degrees,
     33                              SkScalar px, SkScalar py) {
     34         canvas->translate(px, py);
     35         canvas->rotate(degrees);
     36         canvas->translate(-px, -py);
     37     }
     38 
     39     void onDraw(SkCanvas* canvas) override {
     40         SkPaint paint;
     41 
     42         paint.setAntiAlias(true);
     43         paint.setLCDRenderText(true);
     44         //With freetype the default (normal hinting) can be really ugly.
     45         //Most distros now set slight (vertical hinting only) in any event.
     46         paint.setHinting(SkPaint::kSlight_Hinting);
     47         sk_tool_utils::set_portable_typeface(&paint, "Times Roman", SkTypeface::kNormal);
     48 
     49         const char* text = "Hamburgefons ooo mmm";
     50         const size_t textLen = strlen(text);
     51 
     52         for (int j = 0; j < 2; ++j) {
     53             // This used to do 6 iterations but it causes the N4 to crash in the MSAA4 config.
     54             for (int i = 0; i < 5; ++i) {
     55                 SkScalar x = SkIntToScalar(10);
     56                 SkScalar y = SkIntToScalar(20);
     57 
     58                 SkAutoCanvasRestore acr(canvas, true);
     59                 canvas->translate(SkIntToScalar(50 + i * 230),
     60                                   SkIntToScalar(20));
     61                 rotate_about(canvas, SkIntToScalar(i * 5), x, y * 10);
     62 
     63                 {
     64                     SkPaint p;
     65                     p.setAntiAlias(true);
     66                     SkRect r;
     67                     r.set(x - SkIntToScalar(3), SkIntToScalar(15),
     68                           x - SkIntToScalar(1), SkIntToScalar(280));
     69                     canvas->drawRect(r, p);
     70                 }
     71 
     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                 }
     77             }
     78             canvas->translate(0, SkIntToScalar(360));
     79             paint.setSubpixelText(true);
     80         }
     81     }
     82 
     83 private:
     84     typedef GM INHERITED;
     85 };
     86 
     87 //////////////////////////////////////////////////////////////////////////////
     88 
     89 static GM* MyFactory(void*) { return new FontScalerGM; }
     90 static GMRegistry reg(MyFactory);
     91 
     92 }
     93