void OpenVG_SVGHandler::draw() {
vgSeti(VG_MATRIX_MODE, VG_MATRIX_PATH_USER_TO_SURFACE);
// clear out the transform stack
_transform_stack.clear();
float m[9];
vgGetMatrix( m );
// assume the current openvg matrix is like the camera matrix and should always be applied first
Transform2d top;
Transform2d::multiply( top, Transform2d(m), rootTransform() ); // multiply by the root transform
pushTransform( top );
// SVG is origin at the top, left (openvg is origin at the bottom, left)
// so need to flip
// Transform2d flip;
// flip.setScale( 1, -1 );
// pushTransform( flip );
if( _batch ) {
vgLoadMatrix( topTransform().m );
vgDrawBatchMNK( _batch );
} else {
draw_recursive( _root_group );
}
vgLoadMatrix( m ); // restore matrix
_transform_stack.clear();
}
void OpenVG_SVGHandler::draw_recursive( group_t& group ) {
// push the group matrix onto the stack
pushTransform( group.transform );
vgLoadMatrix( topTransform().m );
for ( list<path_object_t>::iterator it = group.path_objects.begin(); it != group.path_objects.end(); it++ ) {
path_object_t& po = *it;
uint32_t draw_params = 0;
if ( po.fill ) {
vgSetPaint( po.fill, VG_FILL_PATH );
draw_params |= VG_FILL_PATH;
}
if ( po.stroke ) {
vgSetPaint( po.stroke, VG_STROKE_PATH );
vgSetf( VG_STROKE_LINE_WIDTH, po.stroke_width );
draw_params |= VG_STROKE_PATH;
}
if( draw_params == 0 ) { // if no stroke or fill use the default black fill
vgSetPaint( _blackBackFill, VG_FILL_PATH );
draw_params |= VG_FILL_PATH;
}
// set the fill rule
vgSeti( VG_FILL_RULE, po.fill_rule );
// trasnform
pushTransform( po.transform );
vgLoadMatrix( topTransform().m );
vgDrawPath( po.path, draw_params );
popTransform();
vgLoadMatrix( topTransform().m );
}
for ( list<group_t>::iterator it = group.children.begin(); it != group.children.end(); it++ ) {
draw_recursive( *it );
}
popTransform();
vgLoadMatrix( topTransform().m );
}
void OpenVG_SVGHandler::optimize() {
if( _batch ) {
vgDestroyBatchMNK( _batch );
_batch = 0;
}
// use the monkvg batch extension to greatly optimize rendering. don't need this for
// other OpenVG implementations
_batch = vgCreateBatchMNK();
vgBeginBatchMNK( _batch );
{ // draw
// clear out the transform stack
_transform_stack.clear();
float m[9];
vgGetMatrix( m );
// assume the current openvg matrix is like the camera matrix and should always be applied first
Transform2d top;
Transform2d::multiply( top, Transform2d(m), rootTransform() ); // multiply by the root transform
pushTransform( top );
// SVG is origin at the top, left (openvg is origin at the bottom, left)
// so need to flip
// Transform2d flip;
// flip.setScale( 1, -1 );
// pushTransform( flip );
draw_recursive( _root_group );
vgLoadMatrix( m ); // restore matrix
_transform_stack.clear();
}
vgEndBatchMNK( _batch );
}
void OpenVG_SVGHandler::dump(void **vertices, size_t *size) {
VGBatchMNK temp;
temp = vgCreateBatchMNK();
vgBeginBatchMNK( temp );
{
// clear the transform stack
_transform_stack.clear();
// save matrix
VGfloat m[9];
vgGetMatrix( m );
// assume the current openvg matrix is like the camera matrix and should always be applied first
Transform2d top;
Transform2d::multiply( top, Transform2d(m), rootTransform() ); // multiply by the root transform
pushTransform( top );
// draw
draw_recursive( _root_group );
// restore matrix
vgLoadMatrix( m );
// clear the transform stack
_transform_stack.clear();
}
vgDumpBatchMNK( temp, vertices, size );
vgEndBatchMNK( temp );
vgDestroyBatchMNK( temp );
}
