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