1 // An image on the Canvas
3 // Copyright (C) 2012 Thomas Geymayer <tomgey@gmail.com>
5 // This library is free software; you can redistribute it and/or
6 // modify it under the terms of the GNU Library General Public
7 // License as published by the Free Software Foundation; either
8 // version 2 of the License, or (at your option) any later version.
10 // This library is distributed in the hope that it will be useful,
11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 // Library General Public License for more details.
15 // You should have received a copy of the GNU Library General Public
16 // License along with this library; if not, write to the Free Software
17 // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
19 #ifndef CANVAS_IMAGE_HXX_
20 #define CANVAS_IMAGE_HXX_
22 #include "CanvasElement.hxx"
24 #include <simgear/canvas/canvas_fwd.hxx>
25 #include <simgear/io/HTTPClient.hxx>
26 #include <simgear/misc/CSSBorder.hxx>
27 #include <simgear/misc/SVGpreserveAspectRatio.hxx>
28 #include <osg/Texture2D>
32 namespace HTTP { class Request; }
40 static const std::string TYPE_NAME;
41 static void staticInit();
44 * @param node Property node containing settings for this image:
45 * rect/[left/right/top/bottom] Dimensions of source
47 * size[0-1] Dimensions of rectangle
48 * [x,y] Position of rectangle
50 Image( const CanvasWeakPtr& canvas,
51 const SGPropertyNode_ptr& node,
52 const Style& parent_style = Style(),
53 Element* parent = 0 );
56 virtual void update(double dt);
57 virtual void valueChanged(SGPropertyNode* child);
59 void setSrcCanvas(CanvasPtr canvas);
60 CanvasWeakPtr getSrcCanvas() const;
62 void setImage(osg::Image *img);
63 void setFill(const std::string& fill);
66 * @see http://www.w3.org/TR/css3-background/#border-image-outset
68 void setOutset(const std::string& outset);
72 * http://www.w3.org/TR/SVG11/coords.html#PreserveAspectRatioAttribute
74 void setPreserveAspectRatio(const std::string& scale);
77 * Set image slice (aka. 9-scale)
79 * @see http://www.w3.org/TR/css3-background/#border-image-slice
81 void setSlice(const std::string& slice);
84 * Set image slice width.
86 * By default the size of the 9-scale grid is the same as specified
87 * with setSlice/"slice". Using this method allows setting values
88 * different to the size in the source image.
90 * @see http://www.w3.org/TR/css3-background/#border-image-width
92 void setSliceWidth(const std::string& width);
94 const SGRect<float>& getRegion() const;
96 bool handleEvent(const EventPtr& event);
102 SRC_RECT = LAST_ATTRIBUTE << 1, // Source image rectangle
103 DEST_SIZE = SRC_RECT << 1, // Element size
104 SRC_CANVAS = DEST_SIZE << 1
107 virtual void childChanged(SGPropertyNode * child);
109 void setupDefaultDimensions();
110 SGRect<int> getTextureDimensions() const;
112 void setQuad(size_t index, const SGVec2f& tl, const SGVec2f& br);
113 void setQuadUV(size_t index, const SGVec2f& tl, const SGVec2f& br);
115 void handleImageLoadDone(HTTP::Request*);
116 bool loadImage( osgDB::ReaderWriter& reader,
117 const std::string& data,
118 HTTP::Request& request,
119 const std::string& type );
121 osg::ref_ptr<osg::Texture2D> _texture;
122 // TODO optionally forward events to canvas
123 CanvasWeakPtr _src_canvas;
124 HTTP::Request_ptr _http_request;
126 osg::ref_ptr<osg::Geometry> _geom;
127 osg::ref_ptr<osg::DrawArrays>_prim;
128 osg::ref_ptr<osg::Vec3Array> _vertices;
129 osg::ref_ptr<osg::Vec2Array> _texCoords;
130 osg::ref_ptr<osg::Vec4Array> _colors;
132 SGPropertyNode *_node_src_rect;
133 SGRect<float> _src_rect,
136 SVGpreserveAspectRatio _preserve_aspect_ratio;
143 } // namespace canvas
144 } // namespace canvas
146 #endif /* CANVAS_IMAGE_HXX_ */