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
14 #include "sk_tool_utils.h"
16 #include "SkSurface.h"
17 #include "SkTextBlob.h"
21 constexpr int kWidth = 750;
22 constexpr int kHeight = 750;
24 class LcdOverlapGM : public skiagm::GM {
27 const int kPointSize = 25;
28 fTextHeight = SkIntToScalar(kPointSize);
32 SkString onShortName() override {
33 return SkString("lcdoverlap");
36 void onOnceBeforeDraw() override {
38 SkTextBlobBuilder builder;
41 sk_tool_utils::set_portable_typeface(&paint);
42 paint.setTextSize(32);
43 const char* text = "able was I ere I saw elba";
44 paint.setAntiAlias(true);
45 paint.setSubpixelText(true);
46 paint.setLCDRenderText(true);
47 sk_tool_utils::add_to_text_blob(&builder, text, paint, 0, 0);
48 fBlob = builder.make();
51 SkISize onISize() override { return SkISize::Make(kWidth, kHeight); }
53 void drawTestCase(SkCanvas* canvas, SkScalar x, SkScalar y, SkBlendMode mode,
55 const SkColor colors[] {
64 for (size_t i = 0; i < SK_ARRAY_COUNT(colors); i++) {
66 canvas->translate(x, y);
67 canvas->rotate(360.0f / SK_ARRAY_COUNT(colors) * i);
68 canvas->translate(-fBlob->bounds().width() / 2.0f + 0.5f, 0);
71 textPaint.setColor(colors[i]);
72 textPaint.setBlendMode(i % 2 == 0 ? mode : mode2);
73 canvas->drawTextBlob(fBlob, 0, 0, textPaint);
78 void onDraw(SkCanvas* canvas) override {
79 SkScalar offsetX = kWidth / 4.0f;
80 SkScalar offsetY = kHeight / 4.0f;
81 drawTestCase(canvas, offsetX, offsetY, SkBlendMode::kSrc, SkBlendMode::kSrc);
82 drawTestCase(canvas, 3 * offsetX, offsetY, SkBlendMode::kSrcOver, SkBlendMode::kSrcOver);
83 drawTestCase(canvas, offsetX, 3 * offsetY, SkBlendMode::kHardLight,
84 SkBlendMode::kLuminosity);
85 drawTestCase(canvas, 3 * offsetX, 3 * offsetY, SkBlendMode::kSrcOver, SkBlendMode::kSrc);
90 sk_sp<SkTextBlob> fBlob;
91 typedef skiagm::GM INHERITED;
94 //////////////////////////////////////////////////////////////////////////////
96 DEF_GM( return new LcdOverlapGM; )