src/third_party/skia/gm/dropshadowimagefilter.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
   8 #include "gm.h"
   9 #include "SkColorFilter.h"
  10
  11 #include "SkColorFilterImageFilter.h"
  12 #include "SkDropShadowImageFilter.h"
  13
  14 ///////////////////////////////////////////////////////////////////////////////
  15
  16 static void draw_paint(SkCanvas* canvas, const SkRect& r, SkImageFilter* imf) {
  17     SkPaint paint;
  18     paint.setImageFilter(imf);
  19     paint.setColor(SK_ColorBLACK);
  20     canvas->save();
  21     canvas->clipRect(r);
  22     canvas->drawPaint(paint);
  23     canvas->restore();
  24 }
  25
  26 static void draw_path(SkCanvas* canvas, const SkRect& r, SkImageFilter* imf) {
  27     SkPaint paint;
  28     paint.setColor(SK_ColorGREEN);
  29     paint.setImageFilter(imf);
  30     paint.setAntiAlias(true);
  31     canvas->save();
  32     canvas->clipRect(r);
  33     canvas->drawCircle(r.centerX(), r.centerY(), r.width()/3, paint);
  34     canvas->restore();
  35 }
  36
  37 static void draw_text(SkCanvas* canvas, const SkRect& r, SkImageFilter* imf) {
  38     SkPaint paint;
  39     paint.setImageFilter(imf);
  40     paint.setColor(SK_ColorGREEN);
  41     paint.setAntiAlias(true);
  42     sk_tool_utils::set_portable_typeface(&paint);
  43     paint.setTextSize(r.height()/2);
  44     paint.setTextAlign(SkPaint::kCenter_Align);
  45     canvas->save();
  46     canvas->clipRect(r);
  47     canvas->drawText("Text", 4, r.centerX(), r.centerY(), paint);
  48     canvas->restore();
  49 }
  50
  51 static void draw_bitmap(SkCanvas* canvas, const SkRect& r, SkImageFilter* imf) {
  52     SkPaint paint;
  53
  54     SkIRect bounds;
  55     r.roundOut(&bounds);
  56
  57     SkBitmap bm;
  58     bm.allocN32Pixels(bounds.width(), bounds.height());
  59     bm.eraseColor(SK_ColorTRANSPARENT);
  60     SkCanvas c(bm);
  61     draw_path(&c, r, NULL);
  62
  63     paint.setImageFilter(imf);
  64     canvas->save();
  65     canvas->clipRect(r);
  66     canvas->drawBitmap(bm, 0, 0, &paint);
  67     canvas->restore();
  68 }
  69
  70 static void draw_sprite(SkCanvas* canvas, const SkRect& r, SkImageFilter* imf) {
  71     SkPaint paint;
  72
  73     SkIRect bounds;
  74     r.roundOut(&bounds);
  75
  76     SkBitmap bm;
  77     bm.allocN32Pixels(bounds.width(), bounds.height());
  78     bm.eraseColor(SK_ColorRED);
  79     SkCanvas c(bm);
  80
  81     SkIRect cropRect = SkIRect::MakeXYWH(10, 10, 44, 44);
  82     paint.setColor(SK_ColorGREEN);
  83     c.drawRect(SkRect::Make(cropRect), paint);
  84
  85     paint.setImageFilter(imf);
  86     SkPoint loc = { r.fLeft, r.fTop };
  87     canvas->getTotalMatrix().mapPoints(&loc, 1);
  88     canvas->drawSprite(bm,
  89                        SkScalarRoundToInt(loc.fX), SkScalarRoundToInt(loc.fY),
  90                        &paint);
  91 }
  92
  93 ///////////////////////////////////////////////////////////////////////////////
  94
  95 class DropShadowImageFilterGM : public skiagm::GM {
  96 public:
  97     DropShadowImageFilterGM () {}
  98
  99 protected:
 100
 101     virtual SkString onShortName() {
 102         return SkString("dropshadowimagefilter");
 103     }
 104
 105     virtual SkISize onISize() { return SkISize::Make(400, 700); }
 106
 107     void draw_frame(SkCanvas* canvas, const SkRect& r) {
 108         SkPaint paint;
 109         paint.setStyle(SkPaint::kStroke_Style);
 110         paint.setColor(SK_ColorRED);
 111         canvas->drawRect(r, paint);
 112     }
 113
 114     virtual uint32_t onGetFlags() const {
 115         // Because of the use of drawSprite, this test is excluded
 116         // from scaled replay tests because drawSprite ignores the
 117         // reciprocal scale that is applied at record time, which is
 118         // the intended behavior of drawSprite.
 119         return kSkipScaledReplay_Flag | kSkipTiled_Flag;
 120     }
 121
 122     virtual void onDraw(SkCanvas* canvas) {
 123         void (*drawProc[])(SkCanvas*, const SkRect&, SkImageFilter*) = {
 124             draw_sprite, draw_bitmap, draw_path, draw_paint, draw_text
 125         };
 126
 127         SkAutoTUnref<SkColorFilter> cf(
 128             SkColorFilter::CreateModeFilter(SK_ColorMAGENTA, SkXfermode::kSrcIn_Mode));
 129         SkAutoTUnref<SkImageFilter> cfif(SkColorFilterImageFilter::Create(cf.get()));
 130         SkImageFilter::CropRect cropRect(SkRect::Make(SkIRect::MakeXYWH(10, 10, 44, 44)),
 131                                          SkImageFilter::CropRect::kHasAll_CropEdge);
 132         SkImageFilter::CropRect bogusRect(SkRect::Make(SkIRect::MakeXYWH(-100, -100, 10, 10)),
 133                                           SkImageFilter::CropRect::kHasAll_CropEdge);
 134
 135         SkImageFilter* filters[] = {
 136             NULL,
 137             SkDropShadowImageFilter::Create(7.0f, 0.0f, 0.0f, 3.0f, SK_ColorBLUE),
 138             SkDropShadowImageFilter::Create(0.0f, 7.0f, 3.0f, 0.0f, SK_ColorBLUE),
 139             SkDropShadowImageFilter::Create(7.0f, 7.0f, 3.0f, 3.0f, SK_ColorBLUE),
 140             SkDropShadowImageFilter::Create(7.0f, 7.0f, 3.0f, 3.0f, SK_ColorBLUE, cfif),
 141             SkDropShadowImageFilter::Create(7.0f, 7.0f, 3.0f, 3.0f, SK_ColorBLUE, NULL, &cropRect),
 142             SkDropShadowImageFilter::Create(7.0f, 7.0f, 3.0f, 3.0f, SK_ColorBLUE, NULL, &bogusRect),
 143         };
 144
 145         SkRect r = SkRect::MakeWH(SkIntToScalar(64), SkIntToScalar(64));
 146         SkScalar MARGIN = SkIntToScalar(16);
 147         SkScalar DX = r.width() + MARGIN;
 148         SkScalar DY = r.height() + MARGIN;
 149
 150         canvas->translate(MARGIN, MARGIN);
 151         for (size_t j = 0; j < SK_ARRAY_COUNT(drawProc); ++j) {
 152             canvas->save();
 153             for (size_t i = 0; i < SK_ARRAY_COUNT(filters); ++i) {
 154                 drawProc[j](canvas, r, filters[i]);
 155                 canvas->translate(0, DY);
 156             }
 157             canvas->restore();
 158             canvas->translate(DX, 0);
 159         }
 160
 161         for(size_t j = 0; j < SK_ARRAY_COUNT(filters); ++j) {
 162             SkSafeUnref(filters[j]);
 163         }
 164     }
 165
 166 private:
 167     typedef GM INHERITED;
 168 };
 169
 170 ///////////////////////////////////////////////////////////////////////////////
 171
 172 static skiagm::GM* MyFactory(void*) { return new DropShadowImageFilterGM; }
 173 static skiagm::GMRegistry reg(MyFactory);