#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);

}

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;

}

}

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;

}

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

return cp;

}