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#include "sk_tool_utils.h"
10
11#include "Resources.h"
12#include "SkCanvas.h"
13#include "SkGradientShader.h"
14#include "SkStream.h"
15#include "SkTextBlob.h"
16#include "SkTypeface.h"
17
18namespace skiagm {
19
20static void draw_blob(SkCanvas* canvas, const SkTextBlob* blob, const SkPaint& skPaint,
21                      const SkRect& clipRect) {
22    SkPaint clipHairline;
23    clipHairline.setColor(SK_ColorWHITE);
24    clipHairline.setStyle(SkPaint::kStroke_Style);
25
26    SkPaint paint(skPaint);
27    canvas->save();
28    canvas->drawRect(clipRect, clipHairline);
29    paint.setAlpha(0x20);
30    canvas->drawTextBlob(blob, 0, 0, paint);
31    canvas->clipRect(clipRect);
32    paint.setAlpha(0xFF);
33    canvas->drawTextBlob(blob, 0, 0, paint);
34    canvas->restore();
35}
36
37class MixedTextBlobsGM : public GM {
38public:
39    MixedTextBlobsGM() { }
40
41protected:
42    void onOnceBeforeDraw() override {
43        fEmojiTypeface = sk_tool_utils::emoji_typeface();
44        fEmojiText = sk_tool_utils::emoji_sample_text();
45        fReallyBigATypeface = MakeResourceAsTypeface("fonts/ReallyBigA.ttf");
46
47        SkTextBlobBuilder builder;
48
49        // make textblob
50        // Text so large we draw as paths
51        SkPaint paint;
52        paint.setTextSize(385);
53        const char* text = "O";
54        sk_tool_utils::set_portable_typeface(&paint);
55
56        SkRect bounds;
57        paint.measureText(text, strlen(text), &bounds);
58
59        SkScalar yOffset = bounds.height();
60        sk_tool_utils::add_to_text_blob(&builder, text, paint, 10, yOffset);
61        SkScalar corruptedAx = bounds.width();
62        SkScalar corruptedAy = yOffset;
63
64        const SkScalar boundsHalfWidth = bounds.width() * SK_ScalarHalf;
65        const SkScalar boundsHalfHeight = bounds.height() * SK_ScalarHalf;
66
67        SkScalar xOffset = boundsHalfWidth;
68        yOffset = boundsHalfHeight;
69
70        // LCD
71        paint.setTextSize(32);
72        text = "LCD!!!!!";
73        paint.setAntiAlias(true);
74        paint.setSubpixelText(true);
75        paint.setLCDRenderText(true);
76        paint.measureText(text, strlen(text), &bounds);
77        sk_tool_utils::add_to_text_blob(&builder, text, paint, xOffset - bounds.width() * 0.25f,
78                                        yOffset - bounds.height() * 0.5f);
79        yOffset += bounds.height();
80
81        // color emoji
82        if (fEmojiTypeface) {
83            paint.setAntiAlias(false);
84            paint.setSubpixelText(false);
85            paint.setLCDRenderText(false);
86            paint.setTypeface(fEmojiTypeface);
87            text = fEmojiText;
88            paint.measureText(text, strlen(text), &bounds);
89            sk_tool_utils::add_to_text_blob(&builder, text, paint, xOffset - bounds.width() * 0.3f,
90                                            yOffset);
91        }
92
93        // Corrupted font
94        paint.setTextSize(12);
95        text = "aA";
96        paint.setTypeface(fReallyBigATypeface);
97        sk_tool_utils::add_to_text_blob(&builder, text, paint, corruptedAx, corruptedAy);
98        fBlob = builder.make();
99    }
100
101    SkString onShortName() override {
102        return SkStringPrintf("mixedtextblobs%s",
103                              sk_tool_utils::platform_font_manager());
104    }
105
106    SkISize onISize() override {
107        return SkISize::Make(kWidth, kHeight);
108    }
109
110    void onDraw(SkCanvas* canvas) override {
111
112        canvas->drawColor(sk_tool_utils::color_to_565(SK_ColorGRAY));
113
114        SkPaint paint;
115
116        // setup work needed to draw text with different clips
117        paint.setColor(SK_ColorBLACK);
118        canvas->translate(10, 40);
119
120        paint.setTextSize(40);
121
122        // compute the bounds of the text and setup some clips
123        SkRect bounds = fBlob->bounds();
124
125        const SkScalar boundsHalfWidth = bounds.width() * SK_ScalarHalf;
126        const SkScalar boundsHalfHeight = bounds.height() * SK_ScalarHalf;
127        const SkScalar boundsQuarterWidth = boundsHalfWidth * SK_ScalarHalf;
128        const SkScalar boundsQuarterHeight = boundsHalfHeight * SK_ScalarHalf;
129
130        SkRect upperLeftClip = SkRect::MakeXYWH(bounds.left(), bounds.top(),
131                                                boundsHalfWidth, boundsHalfHeight);
132        SkRect lowerRightClip = SkRect::MakeXYWH(bounds.centerX(), bounds.centerY(),
133                                                 boundsHalfWidth, boundsHalfHeight);
134        SkRect interiorClip = bounds;
135        interiorClip.inset(boundsQuarterWidth, boundsQuarterHeight);
136
137        const SkRect clipRects[] = { bounds, upperLeftClip, lowerRightClip, interiorClip};
138
139        size_t count = sizeof(clipRects) / sizeof(SkRect);
140        for (size_t x = 0; x < count; ++x) {
141            draw_blob(canvas, fBlob.get(), paint, clipRects[x]);
142            if (x == (count >> 1) - 1) {
143                canvas->translate(SkScalarFloorToScalar(bounds.width() + SkIntToScalar(25)),
144                                  -(x * SkScalarFloorToScalar(bounds.height() +
145                                    SkIntToScalar(25))));
146            } else {
147                canvas->translate(0, SkScalarFloorToScalar(bounds.height() + SkIntToScalar(25)));
148            }
149        }
150    }
151
152private:
153    sk_sp<SkTypeface> fEmojiTypeface;
154    sk_sp<SkTypeface> fReallyBigATypeface;
155    const char* fEmojiText;
156    sk_sp<SkTextBlob> fBlob;
157
158    static constexpr int kWidth = 1250;
159    static constexpr int kHeight = 700;
160
161    typedef GM INHERITED;
162};
163
164//////////////////////////////////////////////////////////////////////////////
165
166DEF_GM(return new MixedTextBlobsGM;)
167}
168