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Side by Side Diff: gm/scalebitmap.cpp

Issue 17381008: More general version of image filtering; reworked to be robust and easier to SSE (Closed) Base URL: https://skia.googlecode.com/svn/trunk
Patch Set: make temp. scale function private; disable GM and bench for that function Created 7 years, 5 months ago
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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
10 #include "SkImageDecoder.h"
11 #include "SkStream.h"
12
13 class ScaleBitmapGM : public skiagm::GM {
14
15 public:
16
17 ScaleBitmapGM(const char filename[], float scale)
18 : fFilename(filename), fScale(scale)
19 {
20 this->setBGColor(0xFFDDDDDD);
21 fName.printf("scalebitmap_%s_%f", filename, scale);
22
23 SkString path(skiagm::GM::gResourcePath);
24 path.append("/");
25 path.append(fFilename);
26
27 SkImageDecoder *codec = NULL;
28 SkFILEStream stream(path.c_str());
29 if (stream.isValid()) {
30 codec = SkImageDecoder::Factory(&stream);
31 }
32 if (codec) {
33 stream.rewind();
34 codec->decode(&stream, &fBM, SkBitmap::kARGB_8888_Config,
35 SkImageDecoder::kDecodePixels_Mode);
36 SkDELETE(codec);
37 } else {
38 fBM.setConfig(SkBitmap::kARGB_8888_Config, 1, 1);
39 fBM.allocPixels();
40 *(fBM.getAddr32(0,0)) = 0xFF0000FF; // red == bad
41 }
42 fSize = fBM.height();
43 }
44
45 protected:
46
47
48 SkBitmap fBM;
49 SkString fName;
50 SkString fFilename;
51 int fSize;
52 float fScale;
53
54
55 virtual SkString onShortName() SK_OVERRIDE {
56 return fName;
57 }
58
59 virtual SkISize onISize() SK_OVERRIDE {
60 return SkISize::Make(fBM.width() * fScale, fBM.height() * fScale);
61 }
62
63 virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
64 SkBitmap dst;
65 dst.setConfig(SkBitmap::kARGB_8888_Config, fBM.width() * fScale, fBM.hei ght() * fScale);
66 dst.allocPixels();
67 fBM.scale(&dst);
68
69 canvas->drawBitmap(dst, 0, 0);
70 }
71
72 private:
73 typedef skiagm::GM INHERITED;
74 };
75
76 class ScaleBitmapMipmapGM: public ScaleBitmapGM {
77 SkMatrix fMatrix;
78
79 public:
80 ScaleBitmapMipmapGM(const char filename[], float scale)
81 : INHERITED(filename, scale)
82 {
83 fName.printf("scalebitmap_mipmap_%s_%f", filename, scale);
84 fBM.buildMipMap();
85 fMatrix.setScale(scale, scale);
86 }
87 protected:
88 virtual void onDraw(SkCanvas *canvas) SK_OVERRIDE {
89 SkPaint paint;
90
91 paint.setFilterBitmap(true);
92 canvas->drawBitmapMatrix(fBM, fMatrix, &paint);
93 }
94 private:
95 typedef ScaleBitmapGM INHERITED;
96 };
97
98 //////////////////////////////////////////////////////////////////////////////
99
100 DEF_GM( return new ScaleBitmapGM("mandrill_128.png", 2); )
101 DEF_GM( return new ScaleBitmapGM("mandrill_64.png", 4); )
102 DEF_GM( return new ScaleBitmapGM("mandrill_32.png", 8); )
103 DEF_GM( return new ScaleBitmapGM("mandrill_16.png", 16); )
104
105 DEF_GM( return new ScaleBitmapGM("nature.jpg", 0.5f); )
106 DEF_GM( return new ScaleBitmapGM("nature.jpg", 0.25f); )
107 DEF_GM( return new ScaleBitmapGM("nature.jpg", 0.125f); )
108 DEF_GM( return new ScaleBitmapGM("nature.jpg", 0.0625f); )
109
110 DEF_GM( return new ScaleBitmapMipmapGM("nature.jpg", 0.5f); )
111 DEF_GM( return new ScaleBitmapMipmapGM("nature.jpg", 0.25f); )
112 DEF_GM( return new ScaleBitmapMipmapGM("nature.jpg", 0.125f); )
113 DEF_GM( return new ScaleBitmapMipmapGM("nature.jpg", 0.0625f); )
114
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