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#include "sk_tool_utils.h"
10
11#include "SkCanvas.h"
12#include "SkSurface.h"
13#include "SkTextBlob.h"
14
15// This tests that we don't try to reuse textblobs from the GPU textblob cache across pixel geometry
16// changes when we have LCD.  crbug/486744
17namespace skiagm {
18class TextBlobGeometryChange : public GM {
19public:
20    TextBlobGeometryChange() { }
21
22protected:
23    SkString onShortName() override {
24        return SkString("textblobgeometrychange");
25    }
26
27    SkISize onISize() override {
28        return SkISize::Make(kWidth, kHeight);
29    }
30
31    void onDraw(SkCanvas* canvas) override {
32        const char text[] = "Hamburgefons";
33
34        SkPaint paint;
35        sk_tool_utils::set_portable_typeface(&paint);
36        paint.setTextSize(20);
37        paint.setAntiAlias(true);
38        paint.setLCDRenderText(true);
39
40        SkTextBlobBuilder builder;
41
42        sk_tool_utils::add_to_text_blob(&builder, text, paint, 10, 10);
43
44        sk_sp<SkTextBlob> blob(builder.make());
45
46        SkImageInfo info = SkImageInfo::MakeN32Premul(200, 200);
47        SkSurfaceProps props(0, kUnknown_SkPixelGeometry);
48        auto surface = canvas->makeSurface(info, &props);
49        if (!surface) {
50            surface = SkSurface::MakeRaster(info, &props);
51        }
52        SkCanvas* c = surface->getCanvas();
53
54        // LCD text on white background
55        SkRect rect = SkRect::MakeLTRB(0.f, 0.f, SkIntToScalar(kWidth), kHeight / 2.f);
56        SkPaint rectPaint;
57        rectPaint.setColor(0xffffffff);
58        canvas->drawRect(rect, rectPaint);
59        canvas->drawTextBlob(blob, 10, 50, paint);
60
61        // This should not look garbled since we should disable LCD text in this case
62        // (i.e., unknown pixel geometry)
63        c->clear(0x00ffffff);
64        c->drawTextBlob(blob, 10, 150, paint);
65        surface->draw(canvas, 0, 0, nullptr);
66    }
67
68private:
69    static constexpr int kWidth = 200;
70    static constexpr int kHeight = 200;
71
72    typedef GM INHERITED;
73};
74
75//////////////////////////////////////////////////////////////////////////////
76
77DEF_GM(return new TextBlobGeometryChange;)
78}
79