1
2 /*
3 * Copyright 2011 Google Inc.
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8 #include "SampleCode.h"
9 #include "SkView.h"
10 #include "SkBlurMaskFilter.h"
11 #include "SkCanvas.h"
12 #include "SkColorShader.h"
13 #include "SkGradientShader.h"
14 #include "SkGraphics.h"
15 #include "SkImageDecoder.h"
16 #include "SkPath.h"
17 #include "SkRandom.h"
18 #include "SkRegion.h"
19 #include "SkShader.h"
20 #include "SkUtils.h"
21 #include "SkXfermode.h"
22 #include "SkColorPriv.h"
23 #include "SkColorFilter.h"
24 #include "SkTime.h"
25 #include "SkTypeface.h"
26 #include "SkTextBox.h"
27 #include "SkOSFile.h"
28 #include "SkStream.h"
29 #include "SkKey.h"
30
31 extern void skia_set_text_gamma(float blackGamma, float whiteGamma);
32
33 #if defined(SK_BUILD_FOR_WIN) && defined(SK_FONTHOST_WIN_GDI)
34 extern SkTypeface* SkCreateTypefaceFromLOGFONT(const LOGFONT&);
35 #endif
36
37 static const char gText[] =
38 "When in the Course of human events it becomes necessary for one people "
39 "to dissolve the political bands which have connected them with another "
40 "and to assume among the powers of the earth, the separate and equal "
41 "station to which the Laws of Nature and of Nature's God entitle them, "
42 "a decent respect to the opinions of mankind requires that they should "
43 "declare the causes which impel them to the separation.";
44
45 class TextBoxView : public SampleView {
46 public:
TextBoxView()47 TextBoxView() {
48 #if defined(SK_BUILD_FOR_WIN) && defined(SK_FONTHOST_WIN_GDI)
49 LOGFONT lf;
50 sk_bzero(&lf, sizeof(lf));
51 lf.lfHeight = 9;
52 SkTypeface* tf0 = SkCreateTypefaceFromLOGFONT(lf);
53 lf.lfHeight = 12;
54 SkTypeface* tf1 = SkCreateTypefaceFromLOGFONT(lf);
55 // we assert that different sizes should not affect which face we get
56 SkASSERT(tf0 == tf1);
57 tf0->unref();
58 tf1->unref();
59 #endif
60 }
61
62 protected:
63 // overrides from SkEventSink
onQuery(SkEvent * evt)64 virtual bool onQuery(SkEvent* evt) {
65 if (SampleCode::TitleQ(*evt)) {
66 SampleCode::TitleR(evt, "TextBox");
67 return true;
68 }
69 return this->INHERITED::onQuery(evt);
70 }
71
drawTest(SkCanvas * canvas,SkScalar w,SkScalar h,SkColor fg,SkColor bg)72 void drawTest(SkCanvas* canvas, SkScalar w, SkScalar h, SkColor fg, SkColor bg) {
73 SkAutoCanvasRestore acr(canvas, true);
74
75 canvas->clipRect(SkRect::MakeWH(w, h));
76 canvas->drawColor(bg);
77 SkScalar margin = 20;
78 SkTextBox tbox;
79 tbox.setMode(SkTextBox::kLineBreak_Mode);
80 tbox.setBox(margin, margin,
81 w - margin, h - margin);
82 tbox.setSpacing(SkIntToScalar(3)/3, 0);
83
84 SkPaint paint;
85 paint.setAntiAlias(true);
86 paint.setLCDRenderText(true);
87 paint.setColor(fg);
88 tbox.setText(gText, strlen(gText), paint);
89
90 for (int i = 9; i < 24; i += 2) {
91 paint.setTextSize(SkIntToScalar(i));
92 tbox.draw(canvas);
93 canvas->translate(0, tbox.getTextHeight() + paint.getFontSpacing());
94 }
95 }
96
onDrawContent(SkCanvas * canvas)97 virtual void onDrawContent(SkCanvas* canvas) {
98 SkScalar width = this->width() / 3;
99 drawTest(canvas, width, this->height(), SK_ColorBLACK, SK_ColorWHITE);
100 canvas->translate(width, 0);
101 drawTest(canvas, width, this->height(), SK_ColorWHITE, SK_ColorBLACK);
102 canvas->translate(width, 0);
103 drawTest(canvas, width, this->height()/2, SK_ColorGRAY, SK_ColorWHITE);
104 canvas->translate(0, this->height()/2);
105 drawTest(canvas, width, this->height()/2, SK_ColorGRAY, SK_ColorBLACK);
106 }
107
108 private:
109 typedef SampleView INHERITED;
110 };
111
112 //////////////////////////////////////////////////////////////////////////////
113
MyFactory()114 static SkView* MyFactory() { return new TextBoxView; }
115 static SkViewRegister reg(MyFactory);
116