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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 
8 #include "gm.h"
9 
10 #include "Resources.h"
11 #include "SkBitmapProcState.h"
12 #include "SkBitmapScaler.h"
13 #include "SkGradientShader.h"
14 #include "SkImageDecoder.h"
15 #include "SkImageEncoder.h"
16 #include "SkStream.h"
17 #include "SkTypeface.h"
18 
computeSize(const SkBitmap & bm,const SkMatrix & mat)19 static SkSize computeSize(const SkBitmap& bm, const SkMatrix& mat) {
20     SkRect bounds = SkRect::MakeWH(SkIntToScalar(bm.width()),
21                                    SkIntToScalar(bm.height()));
22     mat.mapRect(&bounds);
23     return SkSize::Make(bounds.width(), bounds.height());
24 }
25 
draw_row(SkCanvas * canvas,const SkBitmap & bm,const SkMatrix & mat,SkScalar dx)26 static void draw_row(SkCanvas* canvas, const SkBitmap& bm, const SkMatrix& mat, SkScalar dx) {
27     SkPaint paint;
28 
29     SkAutoCanvasRestore acr(canvas, true);
30 
31     canvas->drawBitmapMatrix(bm, mat, &paint);
32 
33     paint.setFilterLevel(SkPaint::kLow_FilterLevel);
34     canvas->translate(dx, 0);
35     canvas->drawBitmapMatrix(bm, mat, &paint);
36 
37     paint.setFilterLevel(SkPaint::kMedium_FilterLevel);
38     canvas->translate(dx, 0);
39     canvas->drawBitmapMatrix(bm, mat, &paint);
40 
41     paint.setFilterLevel(SkPaint::kHigh_FilterLevel);
42     canvas->translate(dx, 0);
43     canvas->drawBitmapMatrix(bm, mat, &paint);
44 }
45 
46 class FilterIndiaBoxGM : public skiagm::GM {
onOnceBeforeDraw()47     void onOnceBeforeDraw() {
48         this->makeBitmap();
49 
50         SkScalar cx = SkScalarHalf(fBM.width());
51         SkScalar cy = SkScalarHalf(fBM.height());
52 
53         float vertScale = 30.0f/55.0f;
54         float horizScale = 150.0f/200.0f;
55 
56         fMatrix[0].setScale(horizScale, vertScale);
57         fMatrix[1].setRotate(30, cx, cy); fMatrix[1].postScale(horizScale, vertScale);
58     }
59 
60 public:
61     SkBitmap    fBM;
62     SkMatrix    fMatrix[2];
63     SkString    fName;
64 
FilterIndiaBoxGM()65     FilterIndiaBoxGM() {
66         this->setBGColor(0xFFDDDDDD);
67     }
68 
FilterIndiaBoxGM(const char filename[])69     FilterIndiaBoxGM(const char filename[]) : fFilename(filename) {
70         fName.printf("filterindiabox");
71     }
72 
73 protected:
onGetFlags() const74     virtual uint32_t onGetFlags() const SK_OVERRIDE {
75         return kSkipTiled_Flag;
76     }
77 
onShortName()78     virtual SkString onShortName() SK_OVERRIDE {
79         return fName;
80     }
81 
onISize()82     virtual SkISize onISize() SK_OVERRIDE {
83         return SkISize::Make(1024, 768);
84     }
85 
onDraw(SkCanvas * canvas)86     virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
87         canvas->translate(10, 10);
88         for (size_t i = 0; i < SK_ARRAY_COUNT(fMatrix); ++i) {
89             SkSize size = computeSize(fBM, fMatrix[i]);
90             size.fWidth += 20;
91             size.fHeight += 20;
92 
93             draw_row(canvas, fBM, fMatrix[i], size.fWidth);
94             canvas->translate(0, size.fHeight);
95         }
96     }
97 
98   protected:
99       SkString fFilename;
100       int fSize;
101 
getScale()102       SkScalar getScale() {
103           return 192.f/fSize;
104       }
105 
makeBitmap()106       void makeBitmap() {
107           SkString resourcePath = GetResourcePath();
108           resourcePath.append("/");
109           resourcePath.append(fFilename);
110 
111           SkImageDecoder* codec = NULL;
112           SkFILEStream stream(resourcePath.c_str());
113           if (stream.isValid()) {
114               codec = SkImageDecoder::Factory(&stream);
115           }
116           if (codec) {
117               stream.rewind();
118               codec->decode(&stream, &fBM, kN32_SkColorType, SkImageDecoder::kDecodePixels_Mode);
119               SkDELETE(codec);
120           } else {
121               fBM.allocN32Pixels(1, 1);
122               *(fBM.getAddr32(0,0)) = 0xFF0000FF; // red == bad
123           }
124           fSize = fBM.height();
125       }
126   private:
127     typedef skiagm::GM INHERITED;
128 };
129 
130 //////////////////////////////////////////////////////////////////////////////
131 
132 
133 DEF_GM( return new FilterIndiaBoxGM("box.gif"); )
134