Home | History | Annotate | Download | only in gm
      1 /*
      2  * Copyright 2014 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 "SkCanvas.h"
     10 #include "SkColorFilter.h"
     11 #include "SkColorPriv.h"
     12 #include "SkShader.h"
     13 
     14 #include "SkBitmapSource.h"
     15 #include "SkBlurImageFilter.h"
     16 #include "SkColorMatrixFilter.h"
     17 #include "SkDisplacementMapEffect.h"
     18 #include "SkDropShadowImageFilter.h"
     19 #include "SkGradientShader.h"
     20 #include "SkMorphologyImageFilter.h"
     21 #include "SkColorFilterImageFilter.h"
     22 #include "SkMergeImageFilter.h"
     23 #include "SkOffsetImageFilter.h"
     24 
     25 ///////////////////////////////////////////////////////////////////////////////
     26 
     27 class ImageFiltersCropExpandGM : public skiagm::GM {
     28 public:
     29     ImageFiltersCropExpandGM () {}
     30 
     31 protected:
     32 
     33     virtual SkString onShortName() {
     34         return SkString("imagefilterscropexpand");
     35     }
     36 
     37     virtual SkISize onISize() { return SkISize::Make(570, 650); }
     38 
     39     void make_checkerboard(SkBitmap* bitmap) {
     40         bitmap->allocN32Pixels(64, 64);
     41         SkCanvas canvas(*bitmap);
     42         canvas.clear(0xFFFF0000);
     43         SkPaint darkPaint;
     44         darkPaint.setColor(0xFF404040);
     45         SkPaint lightPaint;
     46         lightPaint.setColor(0xFFA0A0A0);
     47         for (int y = 8; y < 48; y += 16) {
     48             for (int x = 8; x < 48; x += 16) {
     49                 canvas.save();
     50                 canvas.translate(SkIntToScalar(x), SkIntToScalar(y));
     51                 canvas.drawRect(SkRect::MakeXYWH(0, 0, 8, 8), darkPaint);
     52                 canvas.drawRect(SkRect::MakeXYWH(8, 0, 8, 8), lightPaint);
     53                 canvas.drawRect(SkRect::MakeXYWH(0, 8, 8, 8), lightPaint);
     54                 canvas.drawRect(SkRect::MakeXYWH(8, 8, 8, 8), darkPaint);
     55                 canvas.restore();
     56             }
     57         }
     58     }
     59 
     60     void make_gradient_circle(int width, int height, SkBitmap* bitmap) {
     61         SkScalar x = SkIntToScalar(width / 2);
     62         SkScalar y = SkIntToScalar(height / 2);
     63         SkScalar radius = SkMinScalar(x, y) * 0.8f;
     64         bitmap->allocN32Pixels(width, height);
     65         SkCanvas canvas(*bitmap);
     66         canvas.clear(0x00000000);
     67         SkColor colors[2];
     68         colors[0] = SK_ColorWHITE;
     69         colors[1] = SK_ColorBLACK;
     70         SkAutoTUnref<SkShader> shader(
     71             SkGradientShader::CreateRadial(SkPoint::Make(x, y), radius, colors, NULL, 2,
     72                                            SkShader::kClamp_TileMode)
     73         );
     74         SkPaint paint;
     75         paint.setShader(shader);
     76         canvas.drawCircle(x, y, radius, paint);
     77     }
     78 
     79     static void draw(SkCanvas* canvas, const SkBitmap& bitmap, const SkRect& rect, SkImageFilter* filter) {
     80         SkPaint paint;
     81         paint.setImageFilter(filter)->unref();
     82         canvas->saveLayer(&rect, &paint);
     83         canvas->drawBitmap(bitmap, 0, 0);
     84         canvas->restore();
     85 
     86         SkPaint strokePaint;
     87         strokePaint.setColor(0xFFFF0000);
     88         strokePaint.setStyle(SkPaint::kStroke_Style);
     89         canvas->drawRect(rect, strokePaint);
     90 
     91         canvas->translate(SkIntToScalar(80), 0);
     92     }
     93 
     94     virtual void onDraw(SkCanvas* canvas) {
     95         SkAutoTUnref<SkColorFilter> cf(
     96             SkColorFilter::CreateModeFilter(SK_ColorBLUE, SkXfermode::kSrcIn_Mode));
     97         SkImageFilter::CropRect crop_rect(
     98             SkRect::Make(SkIRect::MakeXYWH(10, 10, 44, 44)),
     99             SkImageFilter::CropRect::kHasAll_CropEdge);
    100 
    101         SkBitmap gradient_circle, checkerboard;
    102         make_gradient_circle(64, 64, &gradient_circle);
    103         make_checkerboard(&checkerboard);
    104 
    105         SkAutoTUnref<SkImageFilter> gradient_circle_source(
    106             SkBitmapSource::Create(gradient_circle));
    107         SkAutoTUnref<SkImageFilter> noop_cropped(
    108             SkOffsetImageFilter::Create(0, 0, NULL, &crop_rect));
    109         SkScalar sk255 = SkIntToScalar(255);
    110         SkScalar matrix[20] = { 1, 0, 0, 0, 0,
    111                                 0, 1, 0, 0, sk255,
    112                                 0, 0, 1, 0, 0,
    113                                 0, 0, 0, 0, sk255 };
    114         SkAutoTUnref<SkColorFilter> cf_alpha_trans(SkColorMatrixFilter::Create(matrix));
    115 
    116         SkRect r = SkRect::MakeWH(SkIntToScalar(64), SkIntToScalar(64));
    117         SkScalar MARGIN = SkIntToScalar(12);
    118 
    119         SkIRect bounds;
    120         r.roundOut(&bounds);
    121 
    122         SkPaint paint;
    123         canvas->translate(MARGIN, MARGIN);
    124         for (int outset = -15; outset <= 20; outset += 5) {
    125             canvas->save();
    126             SkRect rect = crop_rect.rect();
    127             rect.outset(SkIntToScalar(outset),
    128                         SkIntToScalar(outset));
    129             SkImageFilter::CropRect big_rect(rect, SkImageFilter::CropRect::kHasAll_CropEdge);
    130 
    131             draw(canvas, checkerboard, rect, SkColorFilterImageFilter::Create(
    132                 cf_alpha_trans, noop_cropped.get(), &big_rect));
    133 
    134             draw(canvas, checkerboard, rect, SkBlurImageFilter::Create(
    135                 8.0f, 8.0f, noop_cropped.get(), &big_rect));
    136 
    137             draw(canvas, checkerboard, rect, SkDilateImageFilter::Create(
    138                 2, 2, noop_cropped.get(), &big_rect));
    139 
    140             draw(canvas, checkerboard, rect, SkErodeImageFilter::Create(
    141                 2, 2, noop_cropped.get(), &big_rect));
    142 
    143             draw(canvas, checkerboard, rect, SkDropShadowImageFilter::Create(
    144                 SkIntToScalar(10), SkIntToScalar(10), SkIntToScalar(3), SkIntToScalar(3),
    145                 SK_ColorBLUE, noop_cropped.get(), &big_rect));
    146 
    147             draw(canvas, checkerboard, rect, SkDisplacementMapEffect::Create(
    148                 SkDisplacementMapEffect::kR_ChannelSelectorType,
    149                 SkDisplacementMapEffect::kR_ChannelSelectorType,
    150                 SkIntToScalar(12),
    151                 gradient_circle_source.get(),
    152                 noop_cropped.get(),
    153                 &big_rect));
    154 
    155             draw(canvas, checkerboard, rect, SkOffsetImageFilter::Create(
    156                 SkIntToScalar(-8), SkIntToScalar(16), noop_cropped.get(), &big_rect));
    157 
    158             canvas->restore();
    159             canvas->translate(0, SkIntToScalar(80));
    160         }
    161     }
    162 
    163 private:
    164     typedef GM INHERITED;
    165 };
    166 
    167 ///////////////////////////////////////////////////////////////////////////////
    168 
    169 static skiagm::GM* MyFactory(void*) { return new ImageFiltersCropExpandGM; }
    170 static skiagm::GMRegistry reg(MyFactory);
    171