libreoffice/canvas/source/vcl/spritehelper.hxx

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

#pragma once

#include <vcl/bitmapex.hxx>

#include <base/canvascustomspritehelper.hxx>
#include <base/spritesurface.hxx>
#include <vclwrapper.hxx>

#include "backbuffer.hxx"


namespace vclcanvas
{
    /* Definition of SpriteHelper class */

    /** Helper class for canvas sprites.

        This class implements all sprite-related functionality, like
        that available on the XSprite interface.
     */
    class SpriteHelper : public ::canvas::CanvasCustomSpriteHelper
    {
    public:
        SpriteHelper();

        // make CanvasCustomSpriteHelper::init visible for name lookup
        using ::canvas::CanvasCustomSpriteHelper::init;

        /** Late-init the sprite helper

            @param rSpriteSize
            Size of the sprite

            @param rSpriteCanvas
            Sprite canvas this sprite is part of. Object stores
            ref-counted reference to it, thus, don't forget to pass on
            disposing()!

            @param rBackBuffer
            Buffer of the sprite content (non-alpha part)

            @param rBackBufferMask
            Buffer of the sprite content (alpha part)
         */
        void init( const css::geometry::RealSize2D&              rSpriteSize,
                   const ::canvas::SpriteSurface::Reference&     rOwningSpriteCanvas,
                   const BackBufferSharedPtr&                    rBackBuffer,
                   const BackBufferSharedPtr&                    rBackBufferMask,
                   bool                                          bShowSpriteBounds );

        void disposing();

        /** Repaint sprite content to associated sprite canvas

            @param rPos
            Output position (sprite's own position is disregarded)

            @param io_bSurfacesDirty
            When true, the referenced sprite surfaces (backBuffer and
            backBufferMask) have been modified since last call.

            @param bBufferedUpdate
            When true, the redraw does <em>not</em> happen directly on
            the front buffer, but within a VDev. Used to speed up
            drawing.
         */
        void redraw( OutputDevice&              rOutDev,
                     const ::basegfx::B2DPoint& rPos,
                     bool&                      bSurfacesDirty,
                     bool                       bBufferedUpdate ) const;

    private:
        virtual ::basegfx::B2DPolyPolygon polyPolygonFromXPolyPolygon2D(
            css::uno::Reference< css::rendering::XPolyPolygon2D >& xPoly ) const override;

        // for the redraw
        BackBufferSharedPtr                                 mpBackBuffer;
        BackBufferSharedPtr                                 mpBackBufferMask;

        /// Cached bitmap for the current sprite content
        mutable ::canvas::vcltools::VCLObject<BitmapEx>     maContent;

        /// When true, line sprite corners in red
        bool                                                mbShowSpriteBounds;

    };
}

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