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     virtual ~FontScalerGM() {
  19     }
  20
  21 protected:
  22
  23     SkString onShortName() SK_OVERRIDE {
  24         return SkString("fontscaler");
  25     }
  26
  27     SkISize onISize() SK_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) SK_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 }