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#include "sp-mesh-gradient.h"
#include "attributes.h"
#include "xml/repr.h"
#include "display/cairo-utils.h"
#include "sp-factory.h"
namespace {
SPObject* createMeshGradient() {
return new SPMeshGradient();
}
bool meshGradientRegistered = SPFactory::instance().registerObject("svg:meshGradient", createMeshGradient);
}
/*
* Mesh Gradient
*/
//#define MESH_DEBUG
SPMeshGradient::SPMeshGradient() : SPGradient() {
// Start coordinate of mesh
this->x.unset(SVGLength::NONE, 0.0, 0.0);
this->y.unset(SVGLength::NONE, 0.0, 0.0);
}
SPMeshGradient::~SPMeshGradient() {
}
void SPMeshGradient::build(SPDocument *document, Inkscape::XML::Node *repr) {
SPGradient::build(document, repr);
// Start coordinate of mesh
this->readAttr( "x" );
this->readAttr( "y" );
}
void SPMeshGradient::set(unsigned key, gchar const *value) {
switch (key) {
case SP_ATTR_X:
if (!this->x.read(value)) {
this->x.unset(SVGLength::NONE, 0.0, 0.0);
}
this->requestModified(SP_OBJECT_MODIFIED_FLAG);
break;
case SP_ATTR_Y:
if (!this->y.read(value)) {
this->y.unset(SVGLength::NONE, 0.0, 0.0);
}
this->requestModified(SP_OBJECT_MODIFIED_FLAG);
break;
default:
SPGradient::set(key, value);
break;
}
}
/**
* Write mesh gradient attributes to associated repr.
*/
Inkscape::XML::Node* SPMeshGradient::write(Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, guint flags) {
#ifdef MESH_DEBUG
std::cout << "sp_meshgradient_write() ***************************" << std::endl;
#endif
if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) {
repr = xml_doc->createElement("svg:meshGradient");
}
if ((flags & SP_OBJECT_WRITE_ALL) || this->x._set) {
sp_repr_set_svg_double(repr, "x", this->x.computed);
}
if ((flags & SP_OBJECT_WRITE_ALL) || this->y._set) {
sp_repr_set_svg_double(repr, "y", this->y.computed);
}
SPGradient::write(xml_doc, repr, flags);
return repr;
}
void
sp_meshgradient_repr_write(SPMeshGradient *mg)
{
mg->array.write( mg );
}
cairo_pattern_t* SPMeshGradient::pattern_new(cairo_t * /*ct*/,
#if defined(MESH_DEBUG) || (CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 11, 4))
Geom::OptRect const &bbox,
double opacity
#else
Geom::OptRect const & /*bbox*/,
double /*opacity*/
#endif
)
{
using Geom::X;
using Geom::Y;
#ifdef MESH_DEBUG
std::cout << "sp_meshgradient_create_pattern: (" << bbox->x0 << "," << bbox->y0 << ") (" << bbox->x1 << "," << bbox->y1 << ") " << opacity << std::endl;
#endif
this->ensureArray();
cairo_pattern_t *cp = NULL;
#if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 11, 4)
SPMeshNodeArray* array = &(this->array);
cp = cairo_pattern_create_mesh();
for( unsigned int i = 0; i < array->patch_rows(); ++i ) {
for( unsigned int j = 0; j < array->patch_columns(); ++j ) {
SPMeshPatchI patch( &(array->nodes), i, j );
cairo_mesh_pattern_begin_patch( cp );
cairo_mesh_pattern_move_to( cp, patch.getPoint( 0, 0 )[X], patch.getPoint( 0, 0 )[Y] );
for( unsigned int k = 0; k < 4; ++k ) {
#ifdef DEBUG_MESH
std::cout << i << " " << j << " "
<< patch.getPathType( k ) << " (";
for( int p = 0; p < 4; ++p ) {
std::cout << patch.getPoint( k, p );
}
std::cout << ") "
<< patch.getColor( k ).toString() << std::endl;
#endif
switch ( patch.getPathType( k ) ) {
case 'l':
case 'L':
case 'z':
case 'Z':
cairo_mesh_pattern_line_to( cp,
patch.getPoint( k, 3 )[X],
patch.getPoint( k, 3 )[Y] );
break;
case 'c':
case 'C':
{
std::vector< Geom::Point > pts = patch.getPointsForSide( k );
cairo_mesh_pattern_curve_to( cp,
pts[1][X], pts[1][Y],
pts[2][X], pts[2][Y],
pts[3][X], pts[3][Y] );
break;
}
default:
// Shouldn't happen
std::cout << "sp_meshgradient_create_pattern: path error" << std::endl;
}
if( patch.tensorIsSet(k) ) {
// Tensor point defined relative to corner.
Geom::Point t = patch.getTensorPoint(k);
cairo_mesh_pattern_set_control_point( cp, k, t[X], t[Y] );
//std::cout << " sp_meshgradient_create_pattern: tensor " << k
// << " set to " << t << "." << std::endl;
} else {
// Geom::Point t = patch.coonsTensorPoint(k);
//std::cout << " sp_meshgradient_create_pattern: tensor " << k
// << " calculated as " << t << "." <<std::endl;
}
cairo_mesh_pattern_set_corner_color_rgba(
cp, k,
patch.getColor( k ).v.c[0],
patch.getColor( k ).v.c[1],
patch.getColor( k ).v.c[2],
patch.getOpacity( k ) * opacity );
}
cairo_mesh_pattern_end_patch( cp );
}
}
// set pattern matrix
Geom::Affine gs2user = this->gradientTransform;
if (this->getUnits() == SP_GRADIENT_UNITS_OBJECTBOUNDINGBOX) {
Geom::Affine bbox2user(bbox->width(), 0, 0, bbox->height(), bbox->left(), bbox->top());
gs2user *= bbox2user;
}
ink_cairo_pattern_set_matrix(cp, gs2user.inverse());
#else
static bool shown = false;
if( !shown ) {
std::cout << "sp_meshgradient_create_pattern: needs cairo >= 1.11.4, using "
<< cairo_version_string() << std::endl;
shown = true;
}
#endif
/*
cairo_pattern_t *cp = cairo_pattern_create_radial(
rg->fx.computed, rg->fy.computed, 0,
rg->cx.computed, rg->cy.computed, rg->r.computed);
sp_gradient_pattern_common_setup(cp, gr, bbox, opacity);
*/
return cp;
}
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