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