src/third_party/skia/gm/deviceproperties.cpp

   1 /*
   2  * Copyright 2013 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 "SkBitmapDevice.h"
   9 #include "SkTypeface.h"
  10
  11 namespace skiagm {
  12
  13 class DevicePropertiesGM : public GM {
  14 public:
  15     DevicePropertiesGM() {
  16         this->setBGColor(0xFFFFFFFF);
  17     }
  18
  19     virtual ~DevicePropertiesGM() {
  20     }
  21
  22 protected:
  23     virtual SkString onShortName() {
  24         return SkString("deviceproperties");
  25     }
  26
  27     virtual SkISize onISize() {
  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     virtual void onDraw(SkCanvas* originalCanvas) {
  40         SkISize size = this->getISize();
  41         SkBitmap bitmap;
  42         bitmap.allocN32Pixels(size.width(), size.height());
  43         SkDeviceProperties properties = SkDeviceProperties::Make(
  44             SkDeviceProperties::Geometry::Make(SkDeviceProperties::Geometry::kVertical_Orientation,
  45                                                SkDeviceProperties::Geometry::kBGR_Layout),
  46             SK_Scalar1);
  47         SkBitmapDevice device(bitmap, properties);
  48         SkCanvas canvas(&device);
  49         canvas.drawColor(SK_ColorWHITE);
  50
  51         SkPaint paint;
  52
  53         paint.setAntiAlias(true);
  54         paint.setLCDRenderText(true);
  55         //With freetype the default (normal hinting) can be really ugly.
  56         //Most distros now set slight (vertical hinting only) in any event.
  57         paint.setHinting(SkPaint::kSlight_Hinting);
  58         sk_tool_utils::set_portable_typeface(&paint, "Times Roman", SkTypeface::kNormal);
  59
  60         const char* text = "Hamburgefons ooo mmm";
  61         const size_t textLen = strlen(text);
  62
  63         for (int j = 0; j < 2; ++j) {
  64             for (int i = 0; i < 6; ++i) {
  65                 SkScalar x = SkIntToScalar(10);
  66                 SkScalar y = SkIntToScalar(20);
  67
  68                 SkAutoCanvasRestore acr(&canvas, true);
  69                 canvas.translate(SkIntToScalar(50 + i * 230),
  70                                   SkIntToScalar(20));
  71                 rotate_about(&canvas, SkIntToScalar(i * 5), x, y * 10);
  72
  73                 {
  74                     SkPaint p;
  75                     p.setAntiAlias(true);
  76                     SkRect r;
  77                     r.set(x - SkIntToScalar(3), SkIntToScalar(15),
  78                           x - SkIntToScalar(1), SkIntToScalar(280));
  79                     canvas.drawRect(r, p);
  80                 }
  81
  82                 int index = 0;
  83                 for (int ps = 6; ps <= 22; ps++) {
  84                     paint.setTextSize(SkIntToScalar(ps));
  85                     canvas.drawText(text, textLen, x, y, paint);
  86                     y += paint.getFontMetrics(NULL);
  87                     index += 1;
  88                 }
  89             }
  90             canvas.translate(0, SkIntToScalar(360));
  91             paint.setSubpixelText(true);
  92         }
  93         originalCanvas->drawBitmap(bitmap, 0, 0);
  94     }
  95
  96 #ifdef SK_BUILD_FOR_ANDROID
  97     virtual uint32_t onGetFlags() const SK_OVERRIDE {
  98         // On android, we fail due to bad gpu drivers (it seems) by adding too
  99         // much to our text atlas (texture).
 100         return kSkipGPU_Flag;
 101     }
 102 #endif
 103
 104 private:
 105     typedef GM INHERITED;
 106 };
 107
 108 //////////////////////////////////////////////////////////////////////////////
 109
 110 static GM* MyFactory(void*) { return new DevicePropertiesGM; }
 111 static GMRegistry reg(MyFactory);
 112
 113 }