textblobuseaftergpufree.cpp

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/*
 * Copyright 2015 Google Inc.
 *
 * Use of this source code is governed by a BD-style license that can be
 * found in the LICENSE file.
 */
 
#include "gm/gm.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkFont.h"
#include "include/core/SkPaint.h"
#include "include/core/SkRect.h"
#include "include/core/SkScalar.h"
#include "include/core/SkSize.h"
#include "include/core/SkString.h"
#include "include/core/SkTextBlob.h"
#include "include/core/SkTypeface.h"
#include "include/gpu/GrDirectContext.h"
#include "tools/ToolUtils.h"
#include "tools/fonts/FontToolUtils.h"
 
#include <string.h>
 
// This tests that we correctly regenerate textblobs after freeing all gpu resources crbug/491350
namespace skiagm {
class TextBlobUseAfterGpuFree : public GM {
public:
    TextBlobUseAfterGpuFree() { }
 
protected:
    SkString getName() const override { return SkString("textblobuseaftergpufree"); }
 
    SkISize getISize() override { return SkISize::Make(kWidth, kHeight); }
 
    void onDraw(SkCanvas* canvas) override {
        auto dContext = GrAsDirectContext(canvas->recordingContext());
 
        const char text[] = "Hamburgefons";
 
        SkFont font(ToolUtils::DefaultPortableTypeface(), 20);
        auto blob = SkTextBlob::MakeFromText(text, strlen(text), font);
 
        // draw textblob
        SkRect rect = SkRect::MakeLTRB(0.f, 0.f, SkIntToScalar(kWidth), kHeight / 2.f);
        SkPaint rectPaint;
        rectPaint.setColor(0xffffffff);
        canvas->drawRect(rect, rectPaint);
        canvas->drawTextBlob(blob, 20, 60, SkPaint());
 
        // This text should look fine
        if (dContext) {
            dContext->freeGpuResources();
        }
        canvas->drawTextBlob(blob, 20, 160, SkPaint());
    }
 
private:
    inline static constexpr int kWidth = 200;
    inline static constexpr int kHeight = 200;
 
    using INHERITED = GM;
};
 
//////////////////////////////////////////////////////////////////////////////
 
DEF_GM(return new TextBlobUseAfterGpuFree;)
}  // namespace skiagm