skia2/gm/hugepath.cpp

/*
 * Copyright 2018 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#include "gm/gm.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkPaint.h"
#include "include/core/SkPath.h"
#include "include/core/SkRect.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkSurface.h"

DEF_SIMPLE_GM(path_huge_crbug_800804, canvas, 50, 600) {
    SkPaint paint;
    paint.setAntiAlias(true);
    paint.setStyle(SkPaint::kStroke_Style);

    // exercise various special-cases (e.g. hairlines or not)
    const float widths[] = { 0.9f, 1.0f, 1.1f };

    SkPath path;
    for (float w : widths) {
        paint.setStrokeWidth(w);

        path.reset();
        path.moveTo(-1000,12345678901234567890.f);
        path.lineTo(10.5f,200);
        canvas->drawPath(path, paint);

        path.reset();
        path.moveTo(30.5f,400);
        path.lineTo(1000,-9.8765432109876543210e+19f);
        canvas->drawPath(path, paint);

        canvas->translate(3, 0);
    }
}

// Test that we can draw into a huge surface ( > 64K ) and still retain paths and antialiasing.
DEF_SIMPLE_GM(path_huge_aa, canvas, 200, 200) {
    auto proc = [](SkCanvas* canvas, int w, int h) {
        SkAutoCanvasRestore acr(canvas, true);

        auto surf = SkSurface::MakeRasterN32Premul(w, h);
        auto can = surf->getCanvas();

        SkPaint paint;
        SkPath path;
        path.addRoundRect(SkRect::MakeXYWH(4, 4, w - 8, h - 8), 12, 12);

        canvas->save();
        canvas->clipRect(SkRect::MakeXYWH(4, 4, 64, 64));
        can->drawPath(path, paint);
        surf->draw(canvas, 64 - w, 0, nullptr);
        canvas->restore();

        canvas->translate(80, 0);
        canvas->save();
        canvas->clipRect(SkRect::MakeXYWH(4, 4, 64, 64));
        can->clear(0);
        paint.setAntiAlias(true);
        can->drawPath(path, paint);
        surf->draw(canvas, 64 - w, 0, nullptr);
        canvas->restore();
    };

    proc(canvas, 100, 60);
    canvas->translate(0, 80);
    proc(canvas, 100 * 1024, 60);
}