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      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         SkSafeUnref(paint.setTypeface(SkTypeface::CreateFromName("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 }
    114