void wxSVGCanvasCairo::DrawCanvasPath(wxSVGCanvasPathCairo& canvasPath, wxSVGMatrix& matrix,
const wxCSSStyleDeclaration& style, wxSVGSVGElement& svgElem) {
// check Filter
if (style.GetFilter().GetCSSPrimitiveType() == wxCSS_URI && style.GetFilter().GetStringValue().length() > 1) {
wxString filterId = style.GetFilter().GetStringValue().substr(1);
wxSVGElement* filterElem = (wxSVGElement*) svgElem.GetElementById(filterId);
// feGaussianBlur
if (filterElem && filterElem->GetDtd() == wxSVG_FILTER_ELEMENT && filterElem->GetFirstChild() != NULL
&& ((wxSVGSVGElement*) filterElem->GetFirstChild())->GetDtd() == wxSVG_FEGAUSSIANBLUR_ELEMENT) {
float stdX = ((wxSVGFEGaussianBlurElement*) filterElem->GetFirstChild())->GetStdDeviationX().GetAnimVal();
float stdY = ((wxSVGFEGaussianBlurElement*) filterElem->GetFirstChild())->GetStdDeviationY().GetAnimVal();
if (stdX <= 0 || stdY <= 0)
return;
int dx = int(floor(stdX * 3 * sqrt(2 * M_PI) / 4 + 0.5));
int dy = int(floor(stdY * 3 * sqrt(2 * M_PI) / 4 + 0.5));
wxSVGRect rect = canvasPath.GetResultBBox(style, matrix.Inverse());
rect.SetX(rect.GetX() - 2*dx);
rect.SetY(rect.GetY() - 2*dy);
rect.SetWidth(rect.GetWidth() + 4*dx);
rect.SetHeight(rect.GetHeight() + 4*dy);
int width = (int) rect.GetWidth();
int height = (int) rect.GetHeight();
cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height);
cairo_t* cr = cairo_create(surface);
wxSVGMatrix matrix2 = wxSVGMatrix(1, 0, 0, 1, - rect.GetX(), - rect.GetY()).Multiply(matrix);
DrawPath(cr, canvasPath, matrix2, style, svgElem);
gaussianBlur(surface, dx, dy);
// draw surface
cairo_save(m_cr);
SetMatrix(m_cr, wxSVGMatrix(1, 0, 0, 1, rect.GetX(), rect.GetY()));
cairo_set_source_surface(m_cr, surface, 0, 0);
cairo_rectangle(m_cr, 0, 0, width, height);
cairo_paint(m_cr); // fill the rectangle using the pattern
cairo_new_path(m_cr);
cairo_restore(m_cr);
cairo_destroy(cr);
cairo_surface_destroy(surface);
return;
}
}
DrawPath(m_cr, canvasPath, matrix, style, svgElem);
}
unsigned int wxSVGCanvas::GetGradientStops(const wxSVGSVGElement& svgElem, wxSVGGradientElement* gradElem, float opacity) {
if (gradElem == NULL)
return 0;
// Search for the most referenced gradient (we assume that this is the one that contain stops)
while (true) {
wxString grad_href = gradElem->GetHref();
if (grad_href.length() <= 1 || grad_href.GetChar(0) != wxT('#'))
break;
wxSVGElement* tmp = (wxSVGSVGElement*) svgElem.GetElementById(grad_href.substr(1));
if (tmp == NULL || (tmp->GetDtd() != wxSVG_LINEARGRADIENT_ELEMENT
&& tmp->GetDtd() != wxSVG_RADIALGRADIENT_ELEMENT))
break;
gradElem = (wxSVGGradientElement*) tmp;
}
// Count number of stop element
wxSVGStopElement* stop_elem = (wxSVGStopElement*) gradElem->GetChildren();
unsigned int stop_count = 0;
while (stop_elem) {
if (stop_elem->GetDtd() == wxSVG_STOP_ELEMENT)
stop_count++;
stop_elem = (wxSVGStopElement*) stop_elem->GetNext();
}
if (stop_count == 0)
return 0;
// Allocate enough stops
AllocateGradientStops(stop_count);
// Fill the stops
stop_elem = (wxSVGStopElement*) gradElem->GetChildren();
int i = 0;
while (stop_elem) {
if (stop_elem->GetDtd() == wxSVG_STOP_ELEMENT)
SetStopValue(i++, stop_elem->GetOffset(), stop_elem->GetStopOpacity() * opacity,
stop_elem->GetStopColor().GetRGBColor());
stop_elem = (wxSVGStopElement*) stop_elem->GetNext();
}
return stop_count;
}
unsigned int wxSVGCanvas::GetGradientStops(const wxSVGSVGElement& svgElem, wxSVGGradientElement* gradElem, float opacity) {
if (gradElem == NULL)
return 0;
// Search for the most referenced gradient (we assume that this is the one that contain stops)
while (true) {
wxString grad_href = gradElem->GetHref();
if (grad_href.length() <= 1 || grad_href.GetChar(0) != wxT('#'))
break;
wxSVGElement* tmp = (wxSVGSVGElement*) svgElem.GetElementById(grad_href.substr(1));
if (tmp == NULL || (tmp->GetDtd() != wxSVG_LINEARGRADIENT_ELEMENT
&& tmp->GetDtd() != wxSVG_RADIALGRADIENT_ELEMENT))
break;
gradElem = (wxSVGGradientElement*) tmp;
}
// Count number of stop element
wxSVGStopElement* stop_elem = (wxSVGStopElement*) gradElem->GetChildren();
unsigned int stop_count = 0;
while (stop_elem) {
if (stop_elem->GetDtd() == wxSVG_STOP_ELEMENT)
stop_count++;
stop_elem = (wxSVGStopElement*) stop_elem->GetNext();
}
if (stop_count == 0)
return 0;
// Allocate enough stops
AllocateGradientStops(stop_count);
// Fill the stops
stop_elem = (wxSVGStopElement*) gradElem->GetChildren();
int i = 0;
while (stop_elem) {
if (stop_elem->GetDtd() == wxSVG_STOP_ELEMENT) {
wxSVGColor color = stop_elem->GetStopColor();
// no color, default is black
if (color.GetColorType() == wxSVG_COLORTYPE_UNKNOWN)
color = wxSVGColor(0,0,0);
SetStopValue(i++, stop_elem->GetOffset(), stop_elem->GetStopOpacity() * opacity,
color.GetRGBColor());
stop_elem = (wxSVGStopElement*) stop_elem->GetNext();
}
return stop_count;
}
void wxSVGCanvas::GetLinearGradientVector(wxSVGPoint& p1, wxSVGPoint& p2, const wxSVGLinearGradientElement& gradElem,
wxSVGCanvasPath& path) {
p1.SetX(gradElem.GetX1().GetAnimVal());
p1.SetY(gradElem.GetY1().GetAnimVal());
p2.SetX(gradElem.GetX2().GetAnimVal());
p2.SetY(gradElem.GetY2().GetAnimVal());
if (gradElem.GetGradientUnits().GetAnimVal() == wxSVG_UNIT_TYPE_UNKNOWN ||
gradElem.GetGradientUnits().GetAnimVal() == wxSVG_UNIT_TYPE_OBJECTBOUNDINGBOX)
{
wxSVGRect bbox = path.GetBBox();
p1.SetX(bbox.GetX() + p1.GetX()*bbox.GetWidth());
p1.SetY(bbox.GetY() + p1.GetY()*bbox.GetHeight());
p2.SetX(bbox.GetX() + p2.GetX()*bbox.GetWidth());
p2.SetY(bbox.GetY() + p2.GetY()*bbox.GetHeight());
}
// Compute gradient transformation matrix
wxSVGMatrix lg_matrix;
const wxSVGTransformList& transforms = gradElem.GetGradientTransform().GetAnimVal();
for (int i=0; i<(int)transforms.Count(); i++)
lg_matrix = lg_matrix.Multiply(transforms[i].GetMatrix());
p1 = p1.MatrixTransform(lg_matrix);
p2 = p2.MatrixTransform(lg_matrix);
}
void wxSVGCanvasCairo::DrawCanvasImage(wxSVGCanvasImage& canvasImage, cairo_surface_t* cairoSurface,
wxSVGMatrix& matrix, const wxCSSStyleDeclaration& style, wxSVGSVGElement& svgElem) {
if (cairoSurface == NULL)
return;
cairo_save(m_cr);
// ClipPath
if (style.GetClipPath().GetCSSPrimitiveType() == wxCSS_URI && style.GetClipPath().GetStringValue().length() > 1) {
wxString clipPathId = style.GetClipPath().GetStringValue().substr(1);
wxSVGClipPathElement* clipPathElem = (wxSVGClipPathElement*) svgElem.GetElementById(clipPathId);
if (clipPathElem && clipPathElem->GetDtd() == wxSVG_CLIPPATH_ELEMENT) {
clipPathElem->SetOwnerSVGElement(&svgElem);
clipPathElem->SetViewportElement(&svgElem);
wxSVGMatrix clipMatrix(matrix);
clipPathElem->UpdateMatrix(clipMatrix);
SetClipPath(clipPathElem, clipMatrix);
}
}
SetMatrix(m_cr, matrix);
// scale context
double x = canvasImage.m_x;
double y = canvasImage.m_y;
double scaleX = canvasImage.m_width / canvasImage.m_image.GetWidth();
double scaleY = canvasImage.m_height / canvasImage.m_image.GetHeight();
wxSVG_PRESERVEASPECTRATIO align = canvasImage.GetPreserveAspectRatio().GetAlign();
bool alignX = false;
if (align > wxSVG_PRESERVEASPECTRATIO_NONE) {
scaleY = canvasImage.m_height / canvasImage.GetDefaultHeight();
if (canvasImage.GetPreserveAspectRatio().GetMeetOrSlice() != wxSVG_MEETORSLICE_SLICE) {
alignX = scaleX > scaleY;
} else {
cairo_rectangle(m_cr, x, y, canvasImage.m_width, canvasImage.m_height);
cairo_clip(m_cr);
alignX = scaleX < scaleY;
}
if (alignX) {
scaleX = scaleY;
if (align == wxSVG_PRESERVEASPECTRATIO_XMIDYMIN
|| align == wxSVG_PRESERVEASPECTRATIO_XMIDYMID
|| align == wxSVG_PRESERVEASPECTRATIO_XMIDYMAX)
x += (canvasImage.m_width - canvasImage.GetDefaultWidth() * scaleX) / 2;
else if (align == wxSVG_PRESERVEASPECTRATIO_XMAXYMIN
|| align == wxSVG_PRESERVEASPECTRATIO_XMAXYMID
|| align == wxSVG_PRESERVEASPECTRATIO_XMAXYMAX)
x += canvasImage.m_width - canvasImage.GetDefaultWidth() * scaleX;
} else {
scaleY = scaleX;
if (align == wxSVG_PRESERVEASPECTRATIO_XMINYMID
|| align == wxSVG_PRESERVEASPECTRATIO_XMIDYMID
|| align == wxSVG_PRESERVEASPECTRATIO_XMAXYMID)
y += (canvasImage.m_height - canvasImage.GetDefaultHeight() * scaleY) / 2;
else if (align == wxSVG_PRESERVEASPECTRATIO_XMINYMAX
|| align == wxSVG_PRESERVEASPECTRATIO_XMIDYMAX
|| align == wxSVG_PRESERVEASPECTRATIO_XMAXYMAX)
y += canvasImage.m_height - canvasImage.GetDefaultHeight() * scaleY;
}
scaleY = scaleY * canvasImage.GetDefaultHeight() / canvasImage.m_image.GetHeight();
}
cairo_translate(m_cr, x, y);
cairo_scale(m_cr, scaleX, scaleY);
// prepare to draw the image
cairo_set_source_surface(m_cr, cairoSurface, 0, 0);
// use the original size here since the context is scaled already...
cairo_rectangle(m_cr, 0, 0, canvasImage.m_image.GetWidth(), canvasImage.m_image.GetHeight());
// paint
if (style.GetMask().GetCSSPrimitiveType() == wxCSS_URI && style.GetMask().GetStringValue().length() > 1) {
wxString maskId = style.GetMask().GetStringValue().substr(1);
wxSVGMaskElement* maskElem = (wxSVGMaskElement*) svgElem.GetElementById(maskId);
if (maskElem && maskElem->GetDtd() == wxSVG_MASK_ELEMENT) {
maskElem->SetOwnerSVGElement(&svgElem);
maskElem->SetViewportElement(&svgElem);
cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
svgElem.GetWidth().GetAnimVal()/scaleX, svgElem.GetHeight().GetAnimVal()/scaleY);
cairo_t* cr = cairo_create(surface);
wxSVGMatrix maskMatrix;
maskMatrix = maskMatrix.Translate(x, y).ScaleNonUniform(scaleX, scaleY).Inverse();
DrawMask(cr, maskElem, maskMatrix, style, svgElem);
cairo_mask_surface(m_cr, surface, 0, 0);
cairo_destroy(cr);
cairo_surface_destroy(surface);
}
} else {
cairo_paint_with_alpha(m_cr, style.GetOpacity());
}
cairo_new_path(m_cr);
// clean up
cairo_restore(m_cr);
}
void wxSVGCanvasCairo::DrawMask(cairo_t* cr, wxSVGElement* maskElem, const wxSVGMatrix& matrix,
const wxCSSStyleDeclaration& style, wxSVGSVGElement& svgElem) {
SetMatrix(cr, matrix);
wxSVGElement* elem = (wxSVGElement*) (maskElem->GetFirstChild());
while (elem != NULL) {
elem->SetOwnerSVGElement(maskElem->GetOwnerSVGElement());
elem->SetViewportElement(maskElem->GetViewportElement());
wxSVGDocument* doc = (wxSVGDocument*) elem->GetOwnerDocument();
wxSVGCanvasItem* canvasItem = NULL;
wxCSSStyleDeclaration resStyle = style;
switch (elem->GetDtd()) {
case wxSVG_G_ELEMENT: {
wxSVGGElement* gElement = (wxSVGGElement*) elem;
if (gElement->GetVisibility() == wxCSS_VALUE_HIDDEN)
break;
resStyle.Add(((wxSVGGElement*) elem)->GetStyle());
DrawMask(cr, elem, matrix, resStyle, svgElem);
break;
}
case wxSVG_LINE_ELEMENT: {
wxSVGLineElement* element = (wxSVGLineElement*) elem;
if (element->GetVisibility() == wxCSS_VALUE_HIDDEN)
break;
canvasItem = doc->GetCanvas()->CreateItem(element);
resStyle.Add(element->GetStyle());
resStyle.Add(element->GetAnimStyle());
break;
}
case wxSVG_POLYLINE_ELEMENT: {
wxSVGPolylineElement* element = (wxSVGPolylineElement*) elem;
if (element->GetVisibility() == wxCSS_VALUE_HIDDEN)
break;
canvasItem = doc->GetCanvas()->CreateItem(element);
resStyle.Add(element->GetStyle());
resStyle.Add(element->GetAnimStyle());
break;
}
case wxSVG_POLYGON_ELEMENT: {
wxSVGPolygonElement* element = (wxSVGPolygonElement*) elem;
if (element->GetVisibility() == wxCSS_VALUE_HIDDEN)
break;
canvasItem = doc->GetCanvas()->CreateItem(element);
resStyle.Add(element->GetStyle());
resStyle.Add(element->GetAnimStyle());
break;
}
case wxSVG_RECT_ELEMENT: {
wxSVGRectElement* element = (wxSVGRectElement*) elem;
if (element->GetVisibility() == wxCSS_VALUE_HIDDEN)
break;
canvasItem = doc->GetCanvas()->CreateItem(element);
resStyle.Add(element->GetStyle());
resStyle.Add(element->GetAnimStyle());
break;
}
case wxSVG_CIRCLE_ELEMENT: {
wxSVGCircleElement* element = (wxSVGCircleElement*) elem;
if (element->GetVisibility() == wxCSS_VALUE_HIDDEN)
break;
canvasItem = doc->GetCanvas()->CreateItem(element);
resStyle.Add(element->GetStyle());
resStyle.Add(element->GetAnimStyle());
break;
}
case wxSVG_ELLIPSE_ELEMENT: {
wxSVGEllipseElement* element = (wxSVGEllipseElement*) elem;
if (element->GetVisibility() == wxCSS_VALUE_HIDDEN)
break;
canvasItem = doc->GetCanvas()->CreateItem(element);
resStyle.Add(element->GetStyle());
resStyle.Add(element->GetAnimStyle());
break;
}
case wxSVG_PATH_ELEMENT: {
wxSVGPathElement* element = (wxSVGPathElement*) elem;
if (element->GetVisibility() == wxCSS_VALUE_HIDDEN)
break;
canvasItem = doc->GetCanvas()->CreateItem(element);
resStyle.Add(element->GetStyle());
resStyle.Add(element->GetAnimStyle());
break;
}
case wxSVG_USE_ELEMENT: {
wxSVGUseElement* element = (wxSVGUseElement*) elem;
if (element->GetVisibility() == wxCSS_VALUE_HIDDEN)
break;
resStyle.Add(element->GetStyle());
resStyle.Add(element->GetAnimStyle());
// get ref element
wxString href = element->GetHref();
if (href.length() == 0 || href.GetChar(0) != wxT('#'))
break;
href.Remove(0, 1);
wxSVGElement* refElem = (wxSVGElement*) maskElem->GetOwnerSVGElement()->GetElementById(href);
if (!refElem)
break;
// create shadow tree
wxSVGGElement* gElem = new wxSVGGElement();
gElem->SetOwnerDocument(elem->GetOwnerDocument());
gElem->SetOwnerSVGElement(maskElem->GetOwnerSVGElement());
gElem->SetViewportElement(maskElem->GetViewportElement());
gElem->SetStyle(element->GetStyle());
if (element->GetX().GetAnimVal().GetUnitType() != wxSVG_LENGTHTYPE_UNKNOWN)
gElem->Translate(element->GetX().GetAnimVal(), element->GetY().GetAnimVal());
if (refElem->GetDtd() == wxSVG_SYMBOL_ELEMENT || refElem->GetDtd() == wxSVG_SVG_ELEMENT) {
wxSVGSVGElement* svgElem;
if (refElem->GetDtd() == wxSVG_SVG_ELEMENT)
svgElem = (wxSVGSVGElement*) refElem->CloneNode();
else {
svgElem = new wxSVGSVGElement();
wxSvgXmlElement* child = refElem->GetChildren();
while (child) {
svgElem->AddChild(child->CloneNode());
child = child->GetNext();
}
svgElem->SetViewBox(((wxSVGSymbolElement*) refElem)->GetViewBox());
svgElem->SetPreserveAspectRatio(((wxSVGSymbolElement*) refElem)->GetPreserveAspectRatio());
}
if (element->GetWidth().GetAnimVal().GetUnitType() != wxSVG_LENGTHTYPE_UNKNOWN)
svgElem->SetWidth(element->GetWidth().GetAnimVal());
if (element->GetHeight().GetAnimVal().GetUnitType() != wxSVG_LENGTHTYPE_UNKNOWN)
svgElem->SetHeight(element->GetHeight().GetAnimVal());
gElem->AddChild(svgElem);
} else
gElem->AddChild(refElem->CloneNode());
// render
DrawMask(cr, gElem, matrix, resStyle, svgElem);
// delete shadow tree
delete gElem;
break;
}
default:
break;
}
if (canvasItem != NULL) {
DrawPath(cr, ((wxSVGCanvasPathCairo&) *canvasItem), matrix, resStyle, svgElem);
delete canvasItem;
}
elem = (wxSVGElement*) elem->GetNextSibling();
}
}
