blob: 5bb6f1853803f889ab11c6b522e2bef3147a4e67 [file] [log] [blame]
/*
* 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/gm.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkSurface.h"
#include "include/core/SkTextBlob.h"
#include "tools/ToolUtils.h"
namespace skiagm {
constexpr int kWidth = 750;
constexpr 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;
SkFont font(ToolUtils::create_portable_typeface(), 32);
const char* text = "able was I ere I saw elba";
font.setSubpixel(true);
font.setEdging(SkFont::Edging::kSubpixelAntiAlias);
// If we use SkTextBlob::MakeFromText, we get very different positioning ... why?
ToolUtils::add_to_text_blob(&builder, text, font, 0, 0);
fBlob = builder.make();
}
SkISize onISize() override { return SkISize::Make(kWidth, kHeight); }
void drawTestCase(SkCanvas* canvas, SkScalar x, SkScalar y, SkBlendMode mode,
SkBlendMode mode2) {
const SkColor colors[] {
SK_ColorRED,
SK_ColorGREEN,
SK_ColorBLUE,
SK_ColorYELLOW,
SK_ColorCYAN,
SK_ColorMAGENTA,
};
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.setBlendMode(i % 2 == 0 ? mode : mode2);
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, SkBlendMode::kSrc, SkBlendMode::kSrc);
drawTestCase(canvas, 3 * offsetX, offsetY, SkBlendMode::kSrcOver, SkBlendMode::kSrcOver);
drawTestCase(canvas, offsetX, 3 * offsetY, SkBlendMode::kHardLight,
SkBlendMode::kLuminosity);
drawTestCase(canvas, 3 * offsetX, 3 * offsetY, SkBlendMode::kSrcOver, SkBlendMode::kSrc);
}
private:
SkScalar fTextHeight;
sk_sp<SkTextBlob> fBlob;
typedef skiagm::GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
DEF_GM( return new LcdOverlapGM; )
}