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 "SkBlurMaskFilter.h"
12 #include "SkCanvas.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 paint.setStyle(SkPaint::kFill_Style);
45
46 const char text[] = "hambur";
47
48 sk_tool_utils::set_portable_typeface(&paint);
49 paint.setTextSize(256);
50 paint.setAntiAlias(true);
51
52 // setup up maskfilter
53 const SkScalar kSigma = SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(50));
54
55 SkPaint blurPaint(paint);
56 blurPaint.setMaskFilter(SkBlurMaskFilter::Make(kNormal_SkBlurStyle, kSigma));
57
58 SkTextBlobBuilder builder;
59
60 sk_tool_utils::add_to_text_blob(&builder, text, paint, 0, 0);
61
62 sk_sp<SkTextBlob> blob(builder.make());
63
64 SkPaint clearPaint(paint);
65 clearPaint.setColor(SK_ColorWHITE);
66
67 canvas->save();
68 canvas->translate(0, 0);
69 canvas->clipRect(SkRect::MakeLTRB(0, 0, WIDTH, 256));
70 draw_text(canvas, blob, paint, blurPaint, clearPaint);
71 canvas->restore();
72
73 canvas->save();
74 canvas->translate(0, 256);
75 canvas->clipRect(SkRect::MakeLTRB(0, 256, WIDTH, 510));
76 draw_text(canvas, blob, paint, blurPaint, clearPaint);
77 canvas->restore();
78 }
79
80 private:
81 typedef skiagm::GM INHERITED;
82 };
83
84 DEF_GM(return new ClipErrorGM;)
85