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
18static 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.
32class ClipErrorGM : public skiagm::GM {
33public:
34    ClipErrorGM() {}
35
36protected:
37    SkString onShortName() override { return SkString("cliperror"); }
38
39    SkISize onISize() override { return SkISize::Make(WIDTH, HEIGHT); }
40
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
80private:
81    typedef skiagm::GM INHERITED;
82};
83
84DEF_GM(return new ClipErrorGM;)
85