Home | History | Annotate | Download | only in gm 
      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 "SkColorMatrixFilter.h"
     10 #include "SkColorFilterImageFilter.h"
     11 #include "SkTileImageFilter.h"
     12 #include "SkBitmapSource.h"
     13 
     14 #define WIDTH 400
     15 #define HEIGHT 100
     16 #define MARGIN 12
     17 
     18 namespace skiagm {
     19 
     20 class TileImageFilterGM : public GM {
     21 public:
     22     TileImageFilterGM() : fInitialized(false) {
     23         this->setBGColor(0xFF000000);
     24     }
     25 
     26 protected:
     27     virtual SkString onShortName() {
     28         return SkString("tileimagefilter");
     29     }
     30 
     31     void make_bitmap() {
     32         fBitmap.allocN32Pixels(50, 50);
     33         SkCanvas canvas(fBitmap);
     34         canvas.clear(0xFF000000);
     35         SkPaint paint;
     36         paint.setAntiAlias(true);
     37         paint.setColor(0xD000D000);
     38         paint.setTextSize(SkIntToScalar(50));
     39         const char* str = "e";
     40         canvas.drawText(str, strlen(str), SkIntToScalar(10), SkIntToScalar(45), paint);
     41     }
     42 
     43     void make_checkerboard() {
     44         fCheckerboard.allocN32Pixels(80, 80);
     45         SkCanvas canvas(fCheckerboard);
     46         canvas.clear(0x00000000);
     47         SkPaint darkPaint;
     48         darkPaint.setColor(0xFF404040);
     49         SkPaint lightPaint;
     50         lightPaint.setColor(0xFFA0A0A0);
     51         for (int y = 0; y < 80; y += 16) {
     52           for (int x = 0; x < 80; x += 16) {
     53             canvas.save();
     54             canvas.translate(SkIntToScalar(x), SkIntToScalar(y));
     55             canvas.drawRect(SkRect::MakeXYWH(0, 0, 8, 8), darkPaint);
     56             canvas.drawRect(SkRect::MakeXYWH(8, 0, 8, 8), lightPaint);
     57             canvas.drawRect(SkRect::MakeXYWH(0, 8, 8, 8), lightPaint);
     58             canvas.drawRect(SkRect::MakeXYWH(8, 8, 8, 8), darkPaint);
     59             canvas.restore();
     60           }
     61         }
     62     }
     63 
     64     virtual SkISize onISize() {
     65         return SkISize::Make(WIDTH, HEIGHT);
     66     }
     67 
     68     virtual void onDraw(SkCanvas* canvas) {
     69         if (!fInitialized) {
     70             make_bitmap();
     71             make_checkerboard();
     72             fInitialized = true;
     73         }
     74         canvas->clear(0x00000000);
     75 
     76         int x = 0, y = 0;
     77         for (size_t i = 0; i < 4; i++) {
     78             SkBitmap* bitmap = (i & 0x01) ? &fCheckerboard : &fBitmap;
     79             SkRect srcRect = SkRect::MakeXYWH(SkIntToScalar(bitmap->width()/4),
     80                                               SkIntToScalar(bitmap->height()/4),
     81                                               SkIntToScalar(bitmap->width()/(i+1)),
     82                                               SkIntToScalar(bitmap->height()/(i+1)));
     83             SkRect dstRect = SkRect::MakeXYWH(SkIntToScalar(i * 8),
     84                                               SkIntToScalar(i * 4),
     85                                               SkIntToScalar(bitmap->width() - i * 12),
     86                                               SkIntToScalar(bitmap->height()) - i * 12);
     87             SkAutoTUnref<SkImageFilter> tileInput(SkBitmapSource::Create(*bitmap));
     88             SkAutoTUnref<SkImageFilter> filter(
     89                 SkTileImageFilter::Create(srcRect, dstRect, tileInput));
     90             canvas->save();
     91             canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
     92             SkPaint paint;
     93             paint.setImageFilter(filter);
     94             canvas->drawBitmap(fBitmap, 0, 0, &paint);
     95             canvas->restore();
     96             x += bitmap->width() + MARGIN;
     97             if (x + bitmap->width() > WIDTH) {
     98                 x = 0;
     99                 y += bitmap->height() + MARGIN;
    100             }
    101         }
    102 
    103         SkScalar matrix[20] = { SK_Scalar1, 0, 0, 0, 0,
    104                                 0, SK_Scalar1, 0, 0, 0,
    105                                 0, 0, SK_Scalar1, 0, 0,
    106                                 0, 0, 0, SK_Scalar1, 0 };
    107 
    108         SkRect srcRect = SkRect::MakeWH(SkIntToScalar(fBitmap.width()),
    109                                         SkIntToScalar(fBitmap.height()));
    110         SkRect dstRect = SkRect::MakeWH(SkIntToScalar(fBitmap.width() * 2),
    111                                         SkIntToScalar(fBitmap.height() * 2));
    112         SkAutoTUnref<SkImageFilter> tile(SkTileImageFilter::Create(srcRect, dstRect, NULL));
    113         SkAutoTUnref<SkColorFilter> cf(SkColorMatrixFilter::Create(matrix));
    114 
    115         SkAutoTUnref<SkImageFilter> cfif(SkColorFilterImageFilter::Create(cf, tile.get()));
    116         SkPaint paint;
    117         paint.setImageFilter(cfif);
    118         canvas->save();
    119         canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
    120         canvas->clipRect(dstRect);
    121         canvas->saveLayer(&dstRect, &paint);
    122         canvas->drawBitmap(fBitmap, 0, 0);
    123         canvas->restore();
    124         canvas->restore();
    125     }
    126 private:
    127     typedef GM INHERITED;
    128     SkBitmap fBitmap, fCheckerboard;
    129     bool fInitialized;
    130 };
    131 
    132 //////////////////////////////////////////////////////////////////////////////
    133 
    134 static GM* MyFactory(void*) { return new TileImageFilterGM; }
    135 static GMRegistry reg(MyFactory);
    136 
    137 }
    138