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