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 "SkImageFilter.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
  26     SkString onShortName() SK_OVERRIDE {
  27         return SkString("imageresizetiled");
  28     }
  29
  30     SkISize onISize() SK_OVERRIDE {
  31         return SkISize::Make(WIDTH, HEIGHT);
  32     }
  33
  34     void onDraw(SkCanvas* canvas) SK_OVERRIDE {
  35         SkPaint paint;
  36         SkMatrix matrix;
  37         matrix.setScale(RESIZE_FACTOR, RESIZE_FACTOR);
  38         SkAutoTUnref<SkImageFilter> imageFilter(
  39             SkImageFilter::CreateMatrixFilter(matrix, kNone_SkFilterQuality));
  40         paint.setImageFilter(imageFilter.get());
  41         const SkScalar tile_size = SkIntToScalar(100);
  42         SkRect bounds;
  43         canvas->getClipBounds(&bounds);
  44         for (SkScalar y = 0; y < HEIGHT; y += tile_size) {
  45             for (SkScalar x = 0; x < WIDTH; x += tile_size) {
  46                 canvas->save();
  47                 canvas->clipRect(SkRect::MakeXYWH(x, y, tile_size, tile_size));
  48                 canvas->scale(SkScalarInvert(RESIZE_FACTOR),
  49                               SkScalarInvert(RESIZE_FACTOR));
  50                 canvas->saveLayer(NULL, &paint);
  51                 const char* str[] = {
  52                     "The quick",
  53                     "brown fox",
  54                     "jumped over",
  55                     "the lazy dog.",
  56                 };
  57                 SkPaint textPaint;
  58                 textPaint.setAntiAlias(true);
  59                 sk_tool_utils::set_portable_typeface(&textPaint);
  60                 textPaint.setTextSize(SkIntToScalar(100));
  61                 int posY = 0;
  62                 for (unsigned i = 0; i < SK_ARRAY_COUNT(str); i++) {
  63                     posY += 100;
  64                     canvas->drawText(str[i], strlen(str[i]), SkIntToScalar(0),
  65                                      SkIntToScalar(posY), textPaint);
  66                 }
  67                 canvas->restore();
  68                 canvas->restore();
  69             }
  70         }
  71     }
  72
  73 private:
  74     typedef GM INHERITED;
  75 };
  76
  77 //////////////////////////////////////////////////////////////////////////////
  78
  79 DEF_GM(return new ImageResizeTiledGM(); )
  80
  81 }