1/*
2 * Copyright 2015 Google Inc.
3 *
4 * Use of this source code is governed by a BD-style license that can be
5 * found in the LICENSE file.
6 */
7
8#include "gm.h"
9
10#include "SkCanvas.h"
11#include "SkSurface.h"
12#include "SkTextBlob.h"
13
14// This tests that we don't try to reuse textblobs from the GPU textblob cache across pixel geometry
15// changes when we have LCD.  crbug/486744
16namespace skiagm {
17class TextBlobGeometryChange : public GM {
18public:
19    TextBlobGeometryChange() { }
20
21protected:
22    SkString onShortName() override {
23        return SkString("textblobgeometrychange");
24    }
25
26    SkISize onISize() override {
27        return SkISize::Make(kWidth, kHeight);
28    }
29
30    void onDraw(SkCanvas* canvas) override {
31        const char text[] = "Hamburgefons";
32
33        SkPaint paint;
34        sk_tool_utils::set_portable_typeface(&paint);
35        paint.setTextSize(20);
36        paint.setAntiAlias(true);
37        paint.setLCDRenderText(true);
38
39        SkTextBlobBuilder builder;
40
41        sk_tool_utils::add_to_text_blob(&builder, text, paint, 10, 10);
42
43        SkAutoTUnref<const SkTextBlob> blob(builder.build());
44
45        SkImageInfo info = SkImageInfo::MakeN32Premul(200, 200);
46        SkSurfaceProps props(0, kUnknown_SkPixelGeometry);
47        SkAutoTUnref<SkSurface> surface(canvas->newSurface(info, &props));
48        if (surface) {
49            SkCanvas* c = surface->getCanvas();
50
51            // LCD text on white background
52            SkRect rect = SkRect::MakeLTRB(0.f, 0.f, SkIntToScalar(kWidth), kHeight / 2.f);
53            SkPaint rectPaint;
54            rectPaint.setColor(0xffffffff);
55            canvas->drawRect(rect, rectPaint);
56            canvas->drawTextBlob(blob.get(), 10, 50, paint);
57
58            // This should not look garbled since we should disable LCD text in this case
59            // (i.e., unknown pixel geometry)
60            c->clear(0x00ffffff);
61            c->drawTextBlob(blob.get(), 10, 150, paint);
62            surface->draw(canvas, 0, 0, nullptr);
63        } else {
64            const char* text = "This test requires a surface";
65            size_t len = strlen(text);
66            SkPaint paint;
67            canvas->drawText(text, len, 10, 100, paint);
68        }
69    }
70
71private:
72    static const int kWidth = 200;
73    static const int kHeight = 200;
74
75    typedef GM INHERITED;
76};
77
78//////////////////////////////////////////////////////////////////////////////
79
80DEF_GM( return SkNEW(TextBlobGeometryChange); )
81}
82