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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gm.h"
#include "SkCanvas.h"
#include "SkTextBlob.h"
namespace skiagm {
class TextBlobBlockReordering : public GM {
public:
// This gm tests that textblobs translate properly when their draw order is different from their
// flush order
TextBlobBlockReordering() { }
protected:
void onOnceBeforeDraw() override {
SkTextBlobBuilder builder;
// make textblob
// Large text is used to trigger atlas eviction
SkPaint paint;
paint.setTextSize(56);
const char* text = "AB";
sk_tool_utils::set_portable_typeface(&paint);
SkRect bounds;
paint.measureText(text, strlen(text), &bounds);
SkScalar yOffset = bounds.height();
sk_tool_utils::add_to_text_blob(&builder, text, paint, 0, yOffset - 30);
// build
fBlob = builder.make();
}
SkString onShortName() override {
return SkString("textblobblockreordering");
}
SkISize onISize() override {
return SkISize::Make(kWidth, kHeight);
}
// This draws the same text blob 3 times. The second draw used a different
// xfer mode so it doens't get batched with the first and third.
// ultimately thye iwll be flushed in the order first, third, and then second
void onDraw(SkCanvas* canvas) override {
canvas->drawColor(sk_tool_utils::color_to_565(SK_ColorGRAY));
SkPaint paint;
canvas->translate(10, 40);
SkRect bounds = fBlob->bounds();
const int yDelta = SkScalarFloorToInt(bounds.height()) + 20;
const int xDelta = SkScalarFloorToInt(bounds.width());
canvas->drawTextBlob(fBlob, 0, 0, paint);
canvas->translate(SkIntToScalar(xDelta), SkIntToScalar(yDelta));
// draw a rect where the text should be, and then twiddle the xfermode
// so we don't batch
SkPaint redPaint;
redPaint.setColor(SK_ColorRED);
canvas->drawRect(bounds, redPaint);
SkPaint srcInPaint(paint);
srcInPaint.setBlendMode(SkBlendMode::kSrcIn);
canvas->drawTextBlob(fBlob, 0, 0, srcInPaint);
canvas->translate(SkIntToScalar(xDelta), SkIntToScalar(yDelta));
canvas->drawTextBlob(fBlob, 0, 0, paint);
}
private:
sk_sp<SkTextBlob> fBlob;
static constexpr int kWidth = 275;
static constexpr int kHeight = 200;
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
DEF_GM(return new TextBlobBlockReordering;)
}
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