1 /*
2 * Copyright 2016 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/gm.h"
9 #include "include/core/SkBlurTypes.h"
10 #include "include/core/SkCanvas.h"
11 #include "include/core/SkColor.h"
12 #include "include/core/SkFont.h"
13 #include "include/core/SkMaskFilter.h"
14 #include "include/core/SkPaint.h"
15 #include "include/core/SkRect.h"
16 #include "include/core/SkRefCnt.h"
17 #include "include/core/SkScalar.h"
18 #include "include/core/SkSize.h"
19 #include "include/core/SkString.h"
20 #include "include/core/SkTextBlob.h"
21 #include "include/core/SkTypeface.h"
22 #include "src/core/SkBlurMask.h"
23 #include "tools/ToolUtils.h"
24
25 #include <string.h>
26
27 #define WIDTH 800
28 #define HEIGHT 800
29
draw_text(SkCanvas * canvas,sk_sp<SkTextBlob> blob,const SkPaint & paint,const SkPaint & blurPaint,const SkPaint & clearPaint)30 static void draw_text(SkCanvas* canvas, sk_sp<SkTextBlob> blob,
31 const SkPaint& paint, const SkPaint& blurPaint,
32 const SkPaint& clearPaint) {
33 canvas->save();
34 canvas->clipRect(SkRect::MakeLTRB(0, 0, 1081, 665));
35 canvas->drawRect(SkRect::MakeLTRB(0, 0, 1081, 665), clearPaint);
36 // draw as blurred to push glyph to be too large for atlas
37 canvas->drawTextBlob(blob, 0, 256, blurPaint);
38 canvas->drawTextBlob(blob, 0, 477, paint);
39 canvas->restore();
40 }
41
42 // This test ensures that glyphs that are too large for the atlas
43 // are both translated and clipped correctly.
44 class ClipErrorGM : public skiagm::GM {
45 public:
ClipErrorGM()46 ClipErrorGM() {}
47
48 protected:
onShortName()49 SkString onShortName() override { return SkString("cliperror"); }
50
onISize()51 SkISize onISize() override { return SkISize::Make(WIDTH, HEIGHT); }
52
onDraw(SkCanvas * canvas)53 void onDraw(SkCanvas* canvas) override {
54 SkPaint paint;
55 paint.setAntiAlias(true);
56
57 SkFont font(ToolUtils::create_portable_typeface(), 256);
58
59 // setup up maskfilter
60 const SkScalar kSigma = SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(50));
61
62 SkPaint blurPaint(paint);
63 blurPaint.setMaskFilter(SkMaskFilter::MakeBlur(kNormal_SkBlurStyle, kSigma));
64
65 const char text[] = "hambur";
66 auto blob = SkTextBlob::MakeFromText(text, strlen(text), font);
67
68 SkPaint clearPaint(paint);
69 clearPaint.setColor(SK_ColorWHITE);
70
71 canvas->save();
72 canvas->translate(0, 0);
73 canvas->clipRect(SkRect::MakeLTRB(0, 0, WIDTH, 256));
74 draw_text(canvas, blob, paint, blurPaint, clearPaint);
75 canvas->restore();
76
77 canvas->save();
78 canvas->translate(0, 256);
79 canvas->clipRect(SkRect::MakeLTRB(0, 256, WIDTH, 510));
80 draw_text(canvas, blob, paint, blurPaint, clearPaint);
81 canvas->restore();
82 }
83
84 private:
85 using INHERITED = skiagm::GM;
86 };
87
88 DEF_GM(return new ClipErrorGM;)
89