101 lines
3.0 KiB
C++
101 lines
3.0 KiB
C++
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/*
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* Copyright 2015 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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/*
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* Tests overlapping LCD text
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*/
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#include "gm.h"
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#include "SkCanvas.h"
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#include "SkSurface.h"
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#include "SkTextBlob.h"
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namespace skiagm {
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static const int kWidth = 750;
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static const int kHeight = 750;
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class LcdOverlapGM : public skiagm::GM {
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public:
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LcdOverlapGM() {
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const int kPointSize = 25;
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fTextHeight = SkIntToScalar(kPointSize);
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}
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protected:
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SkString onShortName() override {
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return SkString("lcdoverlap");
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}
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void onOnceBeforeDraw() override {
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// build text blob
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SkTextBlobBuilder builder;
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SkPaint paint;
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sk_tool_utils::set_portable_typeface(&paint);
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paint.setTextSize(32);
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const char* text = "able was I ere I saw elba";
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paint.setAntiAlias(true);
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paint.setSubpixelText(true);
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paint.setLCDRenderText(true);
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sk_tool_utils::add_to_text_blob(&builder, text, paint, 0, 0);
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fBlob.reset(builder.build());
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}
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SkISize onISize() override { return SkISize::Make(kWidth, kHeight); }
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void drawTestCase(SkCanvas* canvas, SkScalar x, SkScalar y, SkXfermode::Mode mode,
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SkXfermode::Mode mode2) {
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const SkColor colors[] {
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SK_ColorRED,
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SK_ColorGREEN,
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SK_ColorBLUE,
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SK_ColorYELLOW,
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SK_ColorCYAN,
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SK_ColorMAGENTA,
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};
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SkAutoTUnref<SkXfermode> xfermode(SkXfermode::Create(mode));
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SkAutoTUnref<SkXfermode> xfermode2(SkXfermode::Create(mode2));
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for (size_t i = 0; i < SK_ARRAY_COUNT(colors); i++) {
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canvas->save();
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canvas->translate(x, y);
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canvas->rotate(360.0f / SK_ARRAY_COUNT(colors) * i);
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canvas->translate(-fBlob->bounds().width() / 2.0f + 0.5f, 0);
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SkPaint textPaint;
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textPaint.setColor(colors[i]);
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textPaint.setXfermode(i % 2 == 0 ? xfermode : xfermode2);
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canvas->drawTextBlob(fBlob, 0, 0, textPaint);
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canvas->restore();
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}
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}
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void onDraw(SkCanvas* canvas) override {
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SkScalar offsetX = kWidth / 4.0f;
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SkScalar offsetY = kHeight / 4.0f;
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drawTestCase(canvas, offsetX, offsetY, SkXfermode::kSrc_Mode, SkXfermode::kSrc_Mode);
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drawTestCase(canvas, 3 * offsetX, offsetY, SkXfermode::kSrcOver_Mode,
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SkXfermode::kSrcOver_Mode);
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drawTestCase(canvas, offsetX, 3 * offsetY, SkXfermode::kHardLight_Mode,
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SkXfermode::kLuminosity_Mode);
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drawTestCase(canvas, 3 * offsetX, 3 * offsetY, SkXfermode::kSrcOver_Mode,
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SkXfermode::kSrc_Mode);
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}
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private:
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SkScalar fTextHeight;
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SkAutoTUnref<const SkTextBlob> fBlob;
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typedef skiagm::GM INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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DEF_GM( return new LcdOverlapGM; )
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}
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