--- /dev/null
+// An image on the canvas
+//
+// Copyright (C) 2012 Thomas Geymayer <tomgey@gmail.com>
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License as
+// published by the Free Software Foundation; either version 2 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+// General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+
+#include "CanvasImage.hxx"
+
+#include <osgDB/ReadFile>
+
+#include <Canvas/property_helper.hxx>
+#include <osg/Array>
+#include <osg/Geometry>
+#include <osg/PrimitiveSet>
+
+#include <Main/globals.hxx>
+#include <Main/fg_props.hxx>
+
+namespace canvas
+{
+ //----------------------------------------------------------------------------
+ Image::Image(SGPropertyNode_ptr node):
+ Element(node, COLOR | COLOR_FILL | BOUNDING_BOX),
+ _texture(new osg::Texture2D)
+ {
+ _source_rect = node->getChild("source");
+
+ _geom = new osg::Geometry;
+ _geom->setUseDisplayList(false);
+
+ osg::StateSet *stateSet = _geom->getOrCreateStateSet();
+ stateSet->setTextureAttributeAndModes(0, _texture.get());
+ stateSet->setDataVariance(osg::Object::STATIC);
+
+ // allocate arrays for the image
+ _vertices = new osg::Vec2Array;
+ _vertices->setDataVariance(osg::Object::STATIC);
+ _vertices->reserve(4);
+ _geom->setVertexArray(_vertices);
+
+ _texCoords = new osg::Vec2Array;
+ _texCoords->setDataVariance(osg::Object::STATIC);
+ _texCoords->reserve(4);
+ _geom->setTexCoordArray(0, _texCoords);
+
+ _colors = new osg::Vec4Array;
+ _colors->setDataVariance(osg::Object::STATIC);
+ _geom->setColorBinding(osg::Geometry::BIND_PER_VERTEX);
+ _geom->setColorArray(_colors);
+
+ osg::DrawArrays* prim = new osg::DrawArrays(osg::PrimitiveSet::QUADS);
+ prim->set(osg::PrimitiveSet::QUADS, 0, 1);
+ prim->setDataVariance(osg::Object::STATIC);
+ _geom->addPrimitiveSet(prim);
+
+ setDrawable(_geom);
+ }
+
+ //----------------------------------------------------------------------------
+ Image::~Image()
+ {
+
+ }
+
+ //----------------------------------------------------------------------------
+ void Image::update(double dt)
+ {
+ Element::update(dt);
+
+ if( _attributes_dirty & SRC_RECT ) {
+ _attributes_dirty &= ~SRC_RECT;
+ int texWidth = _texture->getTextureWidth();
+ int texHeight = _texture->getTextureHeight();
+
+ double x0 = _source_rect->getDoubleValue("left"),
+ x1 = _source_rect->getDoubleValue("right"),
+ y0 = _source_rect->getDoubleValue("top"),
+ y1 = _source_rect->getDoubleValue("bottom");
+ double width = x1 - x0, height = y1 - y0;
+
+ _vertices->clear();
+ _vertices->push_back(osg::Vec2(0, 0));
+ _vertices->push_back(osg::Vec2(width, 0));
+ _vertices->push_back(osg::Vec2(width, height));
+ _vertices->push_back(osg::Vec2(0, height));
+ _vertices->dirty();
+
+ double u0 = x0 / texWidth,
+ u1 = x1 / texWidth,
+ v0 = y0 / texHeight,
+ v1 = y1 / texHeight;
+
+ _texCoords->clear();
+ _texCoords->push_back(osg::Vec2(u0, v0));
+ _texCoords->push_back(osg::Vec2(u1, v0));
+ _texCoords->push_back(osg::Vec2(u1, v1));
+ _texCoords->push_back(osg::Vec2(u0, v1));
+ _texCoords->dirty();
+ }
+ }
+
+ //----------------------------------------------------------------------------
+ void Image::childChanged(SGPropertyNode* child)
+ {
+ const std::string& name = child->getNameString();
+
+ if (_source_rect == child)
+ _attributes_dirty |= SRC_RECT;
+ else if (name == "file") {
+ SGPath tpath = globals->resolve_ressource_path(child->getStringValue());
+ if (tpath.isNull() || !tpath.exists()) {
+ SG_LOG(SG_GL, SG_ALERT, "canvas::Image: No such image: " << child->getStringValue());
+ } else {
+ _texture->setImage(osgDB::readImageFile(tpath.c_str()));
+ _attributes_dirty |= SRC_RECT;
+ }
+ }
+ }
+
+ //----------------------------------------------------------------------------
+ void Image::colorChanged(const osg::Vec4& color)
+ {
+ _colors->clear();
+ for (int i=0; i<4; ++i) {
+ _colors->push_back(color);
+ }
+ _colors->dirty();
+ }
+
+ //----------------------------------------------------------------------------
+ void Image::colorFillChanged(const osg::Vec4& /*color*/)
+ {
+ }
+
+} // namespace canvas
--- /dev/null
+// An image on the canvas
+//
+// Copyright (C) 2012 Thomas Geymayer <tomgey@gmail.com>
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License as
+// published by the Free Software Foundation; either version 2 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+// General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+
+#ifndef CANVAS_IMAGE_HXX_
+#define CANVAS_IMAGE_HXX_
+
+#include "element.hxx"
+
+#include <boost/shared_ptr.hpp>
+
+#include <map>
+#include <vector>
+
+#include <osg/Texture2D>
+
+namespace canvas
+{
+
+ class Image:
+ public Element
+ {
+ public:
+ Image(SGPropertyNode_ptr node);
+ ~Image();
+
+ virtual void update(double dt);
+
+ protected:
+
+ enum TextAttributes
+ {
+ SRC_RECT = LAST_ATTRIBUTE << 1, // Source image rectangle
+ };
+
+ SGPropertyNode_ptr _source_rect,
+ _dest_rect;
+
+ virtual void childChanged(SGPropertyNode * child);
+ virtual void colorChanged(const osg::Vec4& color);
+ virtual void colorFillChanged(const osg::Vec4& color);
+
+ void handleHit(float x, float y);
+
+ osg::ref_ptr<osg::Texture2D> _texture;
+
+ osg::Geometry *_geom;
+ osg::Vec2Array *_vertices;
+ osg::Vec2Array *_texCoords;
+ osg::Vec4Array* _colors;
+ };
+
+} // namespace canvas
+
+#endif /* CANVAS_IMAGE_HXX_ */
projects / flightgear.git / commitdiff