gm/fontscaler.cpp

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