gm/tinybitmap.cpp

   1 /*
   2  * Copyright 2011 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 #include "gm.h"
   8 #include "sk_tool_utils.h"
   9 #include "SkColorPriv.h"
  10 #include "SkShader.h"
  11 #include "SkCanvas.h"
  12 #include "SkUtils.h"
  13
  14 namespace skiagm {
  15
  16 static SkBitmap make_bitmap() {
  17     const SkPMColor c[] = { SkPackARGB32(0x80, 0x80, 0, 0) };
  18
  19     SkBitmap bm;
  20     bm.allocPixels(SkImageInfo::Make(1, 1, kIndex_8_SkColorType,
  21                                      kPremul_SkAlphaType),
  22                    SkColorTable::Make(c, SK_ARRAY_COUNT(c)));
  23
  24     *bm.getAddr8(0, 0) = 0;
  25     return bm;
  26 }
  27
  28 class TinyBitmapGM : public GM {
  29 public:
  30     TinyBitmapGM() {
  31         this->setBGColor(sk_tool_utils::color_to_565(0xFFDDDDDD));
  32     }
  33
  34 protected:
  35     SkString onShortName() {
  36         return SkString("tinybitmap");
  37     }
  38
  39     virtual SkISize onISize() { return SkISize::Make(100, 100); }
  40
  41     virtual void onDraw(SkCanvas* canvas) {
  42         SkBitmap bm = make_bitmap();
  43         SkPaint paint;
  44         paint.setAlpha(0x80);
  45         paint.setShader(SkShader::MakeBitmapShader(bm, SkShader::kRepeat_TileMode,
  46                                                    SkShader::kMirror_TileMode));
  47         canvas->drawPaint(paint);
  48     }
  49
  50 private:
  51     typedef GM INHERITED;
  52 };
  53
  54 //////////////////////////////////////////////////////////////////////////////
  55
  56 static GM* MyFactory(void*) { return new TinyBitmapGM; }
  57 static GMRegistry reg(MyFactory);
  58
  59 }