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