Thomas Geymayer
53dea9b069
parseColor is used to parse a CSS color string into an osg::Vec4 which is only available in SimGearScene. If someone needs the function also in SimGear headless mode we have to think about where to better place this function.
353 lines
10 KiB
C++
353 lines
10 KiB
C++
// An image on the Canvas
|
|
//
|
|
// Copyright (C) 2012 Thomas Geymayer <tomgey@gmail.com>
|
|
//
|
|
// This library is free software; you can redistribute it and/or
|
|
// modify it under the terms of the GNU Library General Public
|
|
// License as published by the Free Software Foundation; either
|
|
// version 2 of the License, or (at your option) any later version.
|
|
//
|
|
// This library 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
|
|
// Library General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Library General Public
|
|
// License along with this library; if not, write to the Free Software
|
|
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
|
|
|
|
#include "CanvasImage.hxx"
|
|
|
|
#include <simgear/canvas/Canvas.hxx>
|
|
#include <simgear/canvas/CanvasMgr.hxx>
|
|
#include <simgear/canvas/CanvasSystemAdapter.hxx>
|
|
#include <simgear/scene/util/parse_color.hxx>
|
|
#include <simgear/misc/sg_path.hxx>
|
|
|
|
#include <osg/Array>
|
|
#include <osg/Geometry>
|
|
#include <osg/PrimitiveSet>
|
|
|
|
#include <boost/algorithm/string/predicate.hpp>
|
|
|
|
namespace simgear
|
|
{
|
|
namespace canvas
|
|
{
|
|
/**
|
|
* Callback to enable/disable rendering of canvas displayed inside windows or
|
|
* other canvases.
|
|
*/
|
|
class CullCallback:
|
|
public osg::Drawable::CullCallback
|
|
{
|
|
public:
|
|
CullCallback(const CanvasWeakPtr& canvas);
|
|
|
|
private:
|
|
CanvasWeakPtr _canvas;
|
|
|
|
virtual bool cull( osg::NodeVisitor* nv,
|
|
osg::Drawable* drawable,
|
|
osg::RenderInfo* renderInfo ) const;
|
|
};
|
|
|
|
//----------------------------------------------------------------------------
|
|
CullCallback::CullCallback(const CanvasWeakPtr& canvas):
|
|
_canvas( canvas )
|
|
{
|
|
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
bool CullCallback::cull( osg::NodeVisitor* nv,
|
|
osg::Drawable* drawable,
|
|
osg::RenderInfo* renderInfo ) const
|
|
{
|
|
if( !_canvas.expired() )
|
|
_canvas.lock()->enableRendering();
|
|
|
|
// TODO check if window/image should be culled
|
|
return false;
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
Image::Image( const CanvasWeakPtr& canvas,
|
|
SGPropertyNode_ptr node,
|
|
const Style& parent_style ):
|
|
Element(canvas, node, parent_style),
|
|
_texture(new osg::Texture2D),
|
|
_node_src_rect( node->getNode("source", 0, true) )
|
|
{
|
|
_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::Vec3Array(4);
|
|
_vertices->setDataVariance(osg::Object::STATIC);
|
|
_geom->setVertexArray(_vertices);
|
|
|
|
_texCoords = new osg::Vec2Array(4);
|
|
_texCoords->setDataVariance(osg::Object::STATIC);
|
|
_geom->setTexCoordArray(0, _texCoords);
|
|
|
|
_colors = new osg::Vec4Array(4);
|
|
_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, 4);
|
|
prim->setDataVariance(osg::Object::STATIC);
|
|
_geom->addPrimitiveSet(prim);
|
|
|
|
setDrawable(_geom);
|
|
|
|
addStyle("fill", &Image::setFill, this);
|
|
setFill("#ffffff"); // TODO how should we handle default values?
|
|
|
|
setupStyle();
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
Image::~Image()
|
|
{
|
|
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
void Image::update(double dt)
|
|
{
|
|
Element::update(dt);
|
|
|
|
if( _attributes_dirty & DEST_SIZE )
|
|
{
|
|
(*_vertices)[0].set(_region.l(), _region.t(), 0);
|
|
(*_vertices)[1].set(_region.r(), _region.t(), 0);
|
|
(*_vertices)[2].set(_region.r(), _region.b(), 0);
|
|
(*_vertices)[3].set(_region.l(), _region.b(), 0);
|
|
_vertices->dirty();
|
|
|
|
_attributes_dirty &= ~DEST_SIZE;
|
|
_geom->dirtyBound();
|
|
setBoundingBox(_geom->getBound());
|
|
}
|
|
|
|
if( _attributes_dirty & SRC_RECT )
|
|
{
|
|
double u0 = _src_rect.l(),
|
|
u1 = _src_rect.r(),
|
|
v0 = _src_rect.b(),
|
|
v1 = _src_rect.t();
|
|
|
|
if( !_node_src_rect->getBoolValue("normalized", true) )
|
|
{
|
|
const Rect<int>& tex_dim = getTextureDimensions();
|
|
|
|
u0 /= tex_dim.width();
|
|
u1 /= tex_dim.width();
|
|
v0 /= tex_dim.height();
|
|
v1 /= tex_dim.height();
|
|
}
|
|
|
|
(*_texCoords)[0].set(u0, v0);
|
|
(*_texCoords)[1].set(u1, v0);
|
|
(*_texCoords)[2].set(u1, v1);
|
|
(*_texCoords)[3].set(u0, v1);
|
|
_texCoords->dirty();
|
|
|
|
_attributes_dirty &= ~SRC_RECT;
|
|
}
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
void Image::setSrcCanvas(CanvasPtr canvas)
|
|
{
|
|
if( !_src_canvas.expired() )
|
|
_src_canvas.lock()->removeDependentCanvas(_canvas);
|
|
|
|
_src_canvas = canvas;
|
|
_geom->getOrCreateStateSet()
|
|
->setTextureAttribute(0, canvas ? canvas->getTexture() : 0);
|
|
_geom->setCullCallback(canvas ? new CullCallback(canvas) : 0);
|
|
|
|
if( !_src_canvas.expired() )
|
|
{
|
|
setupDefaultDimensions();
|
|
_src_canvas.lock()->addDependentCanvas(_canvas);
|
|
}
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
CanvasWeakPtr Image::getSrcCanvas() const
|
|
{
|
|
return _src_canvas;
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
void Image::setImage(osg::Image *img)
|
|
{
|
|
// remove canvas...
|
|
setSrcCanvas( CanvasPtr() );
|
|
|
|
_texture->setImage(img);
|
|
_geom->getOrCreateStateSet()
|
|
->setTextureAttributeAndModes(0, _texture);
|
|
|
|
if( img )
|
|
setupDefaultDimensions();
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
void Image::setFill(const std::string& fill)
|
|
{
|
|
osg::Vec4 color;
|
|
if( !parseColor(fill, color) )
|
|
return;
|
|
|
|
for( int i = 0; i < 4; ++i )
|
|
(*_colors)[i] = color;
|
|
_colors->dirty();
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
const Rect<float>& Image::getRegion() const
|
|
{
|
|
return _region;
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
void Image::childChanged(SGPropertyNode* child)
|
|
{
|
|
const std::string& name = child->getNameString();
|
|
|
|
if( child->getParent() == _node_src_rect )
|
|
{
|
|
_attributes_dirty |= SRC_RECT;
|
|
|
|
if( name == "left" )
|
|
_src_rect.setLeft( child->getFloatValue() );
|
|
else if( name == "right" )
|
|
_src_rect.setRight( child->getFloatValue() );
|
|
else if( name == "top" )
|
|
_src_rect.setTop( child->getFloatValue() );
|
|
else if( name == "bottom" )
|
|
_src_rect.setBottom( child->getFloatValue() );
|
|
|
|
return;
|
|
}
|
|
else if( child->getParent() != _node )
|
|
return;
|
|
|
|
if( name == "x" )
|
|
{
|
|
_region.setX( child->getFloatValue() );
|
|
_attributes_dirty |= DEST_SIZE;
|
|
}
|
|
else if( name == "y" )
|
|
{
|
|
_region.setY( child->getFloatValue() );
|
|
_attributes_dirty |= DEST_SIZE;
|
|
}
|
|
else if( name == "size" )
|
|
{
|
|
if( child->getIndex() == 0 )
|
|
_region.setWidth( child->getFloatValue() );
|
|
else
|
|
_region.setHeight( child->getFloatValue() );
|
|
|
|
_attributes_dirty |= DEST_SIZE;
|
|
}
|
|
else if( name == "file" )
|
|
{
|
|
static const std::string CANVAS_PROTOCOL = "canvas://";
|
|
const std::string& path = child->getStringValue();
|
|
|
|
CanvasPtr canvas = _canvas.lock();
|
|
if( !canvas )
|
|
{
|
|
SG_LOG(SG_GL, SG_ALERT, "canvas::Image: No canvas available");
|
|
return;
|
|
}
|
|
|
|
if( boost::starts_with(path, CANVAS_PROTOCOL) )
|
|
{
|
|
CanvasMgr* canvas_mgr = canvas->getCanvasMgr();
|
|
if( !canvas_mgr )
|
|
{
|
|
SG_LOG(SG_GL, SG_ALERT, "canvas::Image: Failed to get CanvasMgr");
|
|
return;
|
|
}
|
|
|
|
const SGPropertyNode* canvas_node =
|
|
canvas_mgr->getPropertyRoot()
|
|
->getParent()
|
|
->getNode( path.substr(CANVAS_PROTOCOL.size()) );
|
|
if( !canvas_node )
|
|
{
|
|
SG_LOG(SG_GL, SG_ALERT, "canvas::Image: No such canvas: " << path);
|
|
return;
|
|
}
|
|
|
|
// TODO add support for other means of addressing canvases (eg. by
|
|
// name)
|
|
CanvasPtr src_canvas = canvas_mgr->getCanvas( canvas_node->getIndex() );
|
|
if( !src_canvas )
|
|
{
|
|
SG_LOG(SG_GL, SG_ALERT, "canvas::Image: Invalid canvas: " << path);
|
|
return;
|
|
}
|
|
|
|
setSrcCanvas(src_canvas);
|
|
}
|
|
else
|
|
{
|
|
setImage( canvas->getSystemAdapter()->getImage(path) );
|
|
}
|
|
}
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
void Image::setupDefaultDimensions()
|
|
{
|
|
if( !_src_rect.width() || !_src_rect.height() )
|
|
{
|
|
const Rect<int>& tex_dim = getTextureDimensions();
|
|
|
|
_node_src_rect->setBoolValue("normalized", false);
|
|
_node_src_rect->setFloatValue("right", tex_dim.width());
|
|
_node_src_rect->setFloatValue("bottom", tex_dim.height());
|
|
}
|
|
|
|
if( !_region.width() || !_region.height() )
|
|
{
|
|
_node->setFloatValue("size[0]", _src_rect.width());
|
|
_node->setFloatValue("size[1]", _src_rect.height());
|
|
}
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
Rect<int> Image::getTextureDimensions() const
|
|
{
|
|
osg::Texture2D *texture = !_src_canvas.expired()
|
|
? _src_canvas.lock()->getTexture()
|
|
: _texture.get();
|
|
|
|
if( !texture )
|
|
return Rect<int>();
|
|
|
|
return Rect<int>
|
|
(
|
|
0,0,
|
|
texture->getTextureWidth(),
|
|
texture->getTextureHeight()
|
|
);
|
|
}
|
|
|
|
} // namespace canvas
|
|
} // namespace simgear
|