2 * Copyright 2015 Google Inc.
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
10 * Tests overlapping LCD text
15 #include "SkSurface.h"
16 #include "SkTextBlob.h"
20 constexpr int kWidth = 750;
21 constexpr int kHeight = 750;
23 class LcdOverlapGM : public skiagm::GM {
26 const int kPointSize = 25;
27 fTextHeight = SkIntToScalar(kPointSize);
31 SkString onShortName() override {
32 return SkString("lcdoverlap");
35 void onOnceBeforeDraw() override {
37 SkTextBlobBuilder builder;
40 sk_tool_utils::set_portable_typeface(&paint);
41 paint.setTextSize(32);
42 const char* text = "able was I ere I saw elba";
43 paint.setAntiAlias(true);
44 paint.setSubpixelText(true);
45 paint.setLCDRenderText(true);
46 sk_tool_utils::add_to_text_blob(&builder, text, paint, 0, 0);
47 fBlob = builder.make();
50 SkISize onISize() override { return SkISize::Make(kWidth, kHeight); }
52 void drawTestCase(SkCanvas* canvas, SkScalar x, SkScalar y, SkXfermode::Mode mode,
53 SkXfermode::Mode mode2) {
54 const SkColor colors[] {
63 sk_sp<SkXfermode> xfermode(SkXfermode::Make(mode));
64 sk_sp<SkXfermode> xfermode2(SkXfermode::Make(mode2));
65 for (size_t i = 0; i < SK_ARRAY_COUNT(colors); i++) {
67 canvas->translate(x, y);
68 canvas->rotate(360.0f / SK_ARRAY_COUNT(colors) * i);
69 canvas->translate(-fBlob->bounds().width() / 2.0f + 0.5f, 0);
72 textPaint.setColor(colors[i]);
73 textPaint.setXfermode(i % 2 == 0 ? xfermode : xfermode2);
74 canvas->drawTextBlob(fBlob, 0, 0, textPaint);
79 void onDraw(SkCanvas* canvas) override {
80 SkScalar offsetX = kWidth / 4.0f;
81 SkScalar offsetY = kHeight / 4.0f;
82 drawTestCase(canvas, offsetX, offsetY, SkXfermode::kSrc_Mode, SkXfermode::kSrc_Mode);
83 drawTestCase(canvas, 3 * offsetX, offsetY, SkXfermode::kSrcOver_Mode,
84 SkXfermode::kSrcOver_Mode);
85 drawTestCase(canvas, offsetX, 3 * offsetY, SkXfermode::kHardLight_Mode,
86 SkXfermode::kLuminosity_Mode);
87 drawTestCase(canvas, 3 * offsetX, 3 * offsetY, SkXfermode::kSrcOver_Mode,
88 SkXfermode::kSrc_Mode);
93 sk_sp<SkTextBlob> fBlob;
94 typedef skiagm::GM INHERITED;
97 //////////////////////////////////////////////////////////////////////////////
99 DEF_GM( return new LcdOverlapGM; )