submodule/skia/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
   8 #include "gm/gm.h"
   9 #include "include/core/SkCanvas.h"
  10 #include "include/core/SkFont.h"
  11 #include "include/core/SkFontTypes.h"
  12 #include "include/core/SkPaint.h"
  13 #include "include/core/SkRect.h"
  14 #include "include/core/SkScalar.h"
  15 #include "include/core/SkSize.h"
  16 #include "include/core/SkString.h"
  17
  18 #include <string.h>
  19
  20 namespace skiagm {
  21
  22 class FontScalerGM : public GM {
  23 public:
  24     FontScalerGM() {
  25         this->setBGColor(0xFFFFFFFF);
  26     }
  27
  28 protected:
  29
  30     SkString onShortName() override {
  31         return SkString("fontscaler");
  32     }
  33
  34     SkISize onISize() override {
  35         return SkISize::Make(1450, 750);
  36     }
  37
  38     void onDraw(SkCanvas* canvas) override {
  39         SkFont font;
  40         font.setEdging(SkFont::Edging::kSubpixelAntiAlias);
  41         //With freetype the default (normal hinting) can be really ugly.
  42         //Most distros now set slight (vertical hinting only) in any event.
  43         font.setHinting(SkFontHinting::kSlight);
  44
  45         const char* text = "Hamburgefons ooo mmm";
  46         const size_t textLen = strlen(text);
  47
  48         for (int j = 0; j < 2; ++j) {
  49             // This used to do 6 iterations but it causes the N4 to crash in the MSAA4 config.
  50             for (int i = 0; i < 5; ++i) {
  51                 SkScalar x = 10;
  52                 SkScalar y = 20;
  53
  54                 SkAutoCanvasRestore acr(canvas, true);
  55                 canvas->translate(SkIntToScalar(50 + i * 230),
  56                                   SkIntToScalar(20));
  57                 canvas->rotate(SkIntToScalar(i * 5), x, y * 10);
  58
  59                 {
  60                     SkPaint p;
  61                     p.setAntiAlias(true);
  62                     SkRect r;
  63                     r.setLTRB(x - 3, 15, x - 1, 280);
  64                     canvas->drawRect(r, p);
  65                 }
  66
  67                 for (int ps = 6; ps <= 22; ps++) {
  68                     font.setSize(SkIntToScalar(ps));
  69                     canvas->drawSimpleText(text, textLen, SkTextEncoding::kUTF8, x, y, font, SkPaint());
  70                     y += font.getMetrics(nullptr);
  71                 }
  72             }
  73             canvas->translate(0, SkIntToScalar(360));
  74             font.setSubpixel(true);
  75             font.setLinearMetrics(true);
  76             font.setBaselineSnap(false);
  77         }
  78     }
  79
  80 private:
  81     using INHERITED = GM;
  82 };
  83
  84 //////////////////////////////////////////////////////////////////////////////
  85
  86 DEF_GM( return new FontScalerGM; )
  87
  88 }  // namespace skiagm