153 lines
4.7 KiB
C++
153 lines
4.7 KiB
C++
// An image on the Canvas
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//
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// Copyright (C) 2012 Thomas Geymayer <tomgey@gmail.com>
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Library General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Library General Public License for more details.
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//
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// You should have received a copy of the GNU Library General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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#ifndef CANVAS_IMAGE_HXX_
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#define CANVAS_IMAGE_HXX_
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#include "CanvasElement.hxx"
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#include <simgear/canvas/canvas_fwd.hxx>
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#include <simgear/io/HTTPClient.hxx>
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#include <simgear/misc/CSSBorder.hxx>
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#include <simgear/misc/SVGpreserveAspectRatio.hxx>
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#include <osg/Texture2D>
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namespace simgear
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{
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namespace HTTP { class Request; }
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namespace canvas
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{
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class Image:
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public Element
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{
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public:
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static const std::string TYPE_NAME;
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static void staticInit();
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/**
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* @param node Property node containing settings for this image:
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* rect/[left/right/top/bottom] Dimensions of source
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* rect
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* size[0-1] Dimensions of rectangle
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* [x,y] Position of rectangle
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*/
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Image( const CanvasWeakPtr& canvas,
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const SGPropertyNode_ptr& node,
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const Style& parent_style = Style(),
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ElementWeakPtr parent = 0 );
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virtual ~Image();
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virtual void valueChanged(SGPropertyNode* child);
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void setSrcCanvas(CanvasPtr canvas);
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CanvasWeakPtr getSrcCanvas() const;
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void setImage(osg::ref_ptr<osg::Image> img);
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void setFill(const std::string& fill);
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void setFill(const osg::Vec4& color);
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/**
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* @see http://www.w3.org/TR/css3-background/#border-image-outset
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*/
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void setOutset(const std::string& outset);
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/**
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* @see
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* http://www.w3.org/TR/SVG11/coords.html#PreserveAspectRatioAttribute
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*/
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void setPreserveAspectRatio(const std::string& scale);
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/**
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* Set image slice (aka. 9-scale)
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*
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* @see http://www.w3.org/TR/css3-background/#border-image-slice
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*/
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void setSlice(const std::string& slice);
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/**
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* Set image slice width.
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*
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* By default the size of the 9-scale grid is the same as specified
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* with setSlice/"slice". Using this method allows setting values
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* different to the size in the source image.
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*
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* @see http://www.w3.org/TR/css3-background/#border-image-width
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*/
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void setSliceWidth(const std::string& width);
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const SGRect<float>& getRegion() const;
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bool handleEvent(const EventPtr& event);
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/**
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*
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*/
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void setSourceRect(const SGRect<float>& sourceRect);
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protected:
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enum ImageAttributes
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{
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SRC_RECT = LAST_ATTRIBUTE << 1, // Source image rectangle
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DEST_SIZE = SRC_RECT << 1, // Element size
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SRC_CANVAS = DEST_SIZE << 1
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};
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virtual void updateImpl(double dt);
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virtual void childChanged(SGPropertyNode * child);
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void setupDefaultDimensions();
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SGRect<int> getTextureDimensions() const;
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void setQuad(size_t index, const SGVec2f& tl, const SGVec2f& br);
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void setQuadUV(size_t index, const SGVec2f& tl, const SGVec2f& br);
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void handleImageLoadDone(HTTP::Request*);
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bool loadImage( osgDB::ReaderWriter& reader,
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const std::string& data,
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HTTP::Request& request,
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const std::string& type );
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osg::ref_ptr<osg::Texture2D> _texture;
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// TODO optionally forward events to canvas
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CanvasWeakPtr _src_canvas;
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HTTP::Request_ptr _http_request;
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osg::ref_ptr<osg::Geometry> _geom;
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osg::ref_ptr<osg::DrawArrays>_prim;
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osg::ref_ptr<osg::Vec3Array> _vertices;
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osg::ref_ptr<osg::Vec2Array> _texCoords;
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osg::ref_ptr<osg::Vec4Array> _colors;
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SGPropertyNode *_node_src_rect = nullptr;
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SGRect<float> _src_rect {0, 0},
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_region {0, 0};
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SVGpreserveAspectRatio _preserve_aspect_ratio;
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CSSBorder _outset,
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_slice,
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_slice_width;
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};
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} // namespace canvas
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} // namespace canvas
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#endif /* CANVAS_IMAGE_HXX_ */
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