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