src/third_party/skia/gm/imageresizetiled.cpp

   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 "SkMatrixImageFilter.h"
  10 #include "SkRandom.h"
  11
  12 #define WIDTH 640
  13 #define HEIGHT 480
  14
  15 #define RESIZE_FACTOR SkIntToScalar(2)
  16
  17 namespace skiagm {
  18
  19 class ImageResizeTiledGM : public GM {
  20 public:
  21     ImageResizeTiledGM() {
  22     }
  23
  24 protected:
  25     virtual uint32_t onGetFlags() const SK_OVERRIDE { return kNoBBH_Flag; }
  26
  27     virtual SkString onShortName() SK_OVERRIDE {
  28         return SkString("imageresizetiled");
  29     }
  30
  31     virtual SkISize onISize() SK_OVERRIDE {
  32         return SkISize::Make(WIDTH, HEIGHT);
  33     }
  34
  35     virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
  36         SkPaint paint;
  37         SkMatrix matrix;
  38         matrix.setScale(RESIZE_FACTOR, RESIZE_FACTOR);
  39         SkAutoTUnref<SkImageFilter> imageFilter(
  40             SkMatrixImageFilter::Create(matrix, SkPaint::kNone_FilterLevel));
  41         paint.setImageFilter(imageFilter.get());
  42         const SkScalar tile_size = SkIntToScalar(100);
  43         SkRect bounds;
  44         canvas->getClipBounds(&bounds);
  45         for (SkScalar y = 0; y < HEIGHT; y += tile_size) {
  46             for (SkScalar x = 0; x < WIDTH; x += tile_size) {
  47                 canvas->save();
  48                 canvas->clipRect(SkRect::MakeXYWH(x, y, tile_size, tile_size));
  49                 canvas->scale(SkScalarInvert(RESIZE_FACTOR),
  50                               SkScalarInvert(RESIZE_FACTOR));
  51                 canvas->saveLayer(NULL, &paint);
  52                 const char* str[] = {
  53                     "The quick",
  54                     "brown fox",
  55                     "jumped over",
  56                     "the lazy dog.",
  57                 };
  58                 SkPaint textPaint;
  59                 textPaint.setAntiAlias(true);
  60                 sk_tool_utils::set_portable_typeface(&textPaint);
  61                 textPaint.setTextSize(SkIntToScalar(100));
  62                 int posY = 0;
  63                 for (unsigned i = 0; i < SK_ARRAY_COUNT(str); i++) {
  64                     posY += 100;
  65                     canvas->drawText(str[i], strlen(str[i]), SkIntToScalar(0),
  66                                      SkIntToScalar(posY), textPaint);
  67                 }
  68                 canvas->restore();
  69                 canvas->restore();
  70             }
  71         }
  72     }
  73
  74 private:
  75     typedef GM INHERITED;
  76 };
  77
  78 //////////////////////////////////////////////////////////////////////////////
  79
  80 DEF_GM(return new ImageResizeTiledGM(); )
  81
  82 }