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-rw-r--r--src/object/sp-mesh-gradient.cpp270
1 files changed, 270 insertions, 0 deletions
diff --git a/src/object/sp-mesh-gradient.cpp b/src/object/sp-mesh-gradient.cpp
new file mode 100644
index 0000000..47293da
--- /dev/null
+++ b/src/object/sp-mesh-gradient.cpp
@@ -0,0 +1,270 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/** @file
+ * TODO: insert short description here
+ *//*
+ * Authors: see git history
+ *
+ * Copyright (C) 2018 Authors
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+#include <glibmm.h>
+
+#include "attributes.h"
+#include "display/cairo-utils.h"
+
+#include "sp-mesh-gradient.h"
+
+/*
+ * Mesh Gradient
+ */
+//#define MESH_DEBUG
+//#define OBJECT_TRACE
+
+SPMeshGradient::SPMeshGradient() : SPGradient(), type( SP_MESH_TYPE_COONS ), type_set(false) {
+#ifdef OBJECT_TRACE
+ objectTrace( "SPMeshGradient::SPMeshGradient" );
+#endif
+
+ // Start coordinate of mesh
+ this->x.unset(SVGLength::NONE, 0.0, 0.0);
+ this->y.unset(SVGLength::NONE, 0.0, 0.0);
+
+#ifdef OBJECT_TRACE
+ objectTrace( "SPMeshGradient::SPMeshGradient", false );
+#endif
+}
+
+SPMeshGradient::~SPMeshGradient() {
+#ifdef OBJECT_TRACE
+ objectTrace( "SPMeshGradient::~SPMeshGradient (empty function)" );
+ objectTrace( "SPMeshGradient::~SPMeshGradient", false );
+#endif
+}
+
+void SPMeshGradient::build(SPDocument *document, Inkscape::XML::Node *repr) {
+#ifdef OBJECT_TRACE
+ objectTrace( "SPMeshGradient::build" );
+#endif
+
+ SPGradient::build(document, repr);
+
+ // Start coordinate of meshgradient
+ this->readAttr(SPAttr::X);
+ this->readAttr(SPAttr::Y);
+
+ this->readAttr(SPAttr::TYPE);
+
+#ifdef OBJECT_TRACE
+ objectTrace( "SPMeshGradient::build", false );
+#endif
+}
+
+
+void SPMeshGradient::set(SPAttr key, gchar const *value) {
+#ifdef OBJECT_TRACE
+ objectTrace( "SPMeshGradient::set" );
+#endif
+
+ switch (key) {
+ case SPAttr::X:
+ if (!this->x.read(value)) {
+ this->x.unset(SVGLength::NONE, 0.0, 0.0);
+ }
+
+ this->requestModified(SP_OBJECT_MODIFIED_FLAG);
+ break;
+
+ case SPAttr::Y:
+ if (!this->y.read(value)) {
+ this->y.unset(SVGLength::NONE, 0.0, 0.0);
+ }
+
+ this->requestModified(SP_OBJECT_MODIFIED_FLAG);
+ break;
+
+ case SPAttr::TYPE:
+ if (value) {
+ if (!strcmp(value, "coons")) {
+ this->type = SP_MESH_TYPE_COONS;
+ } else if (!strcmp(value, "bicubic")) {
+ this->type = SP_MESH_TYPE_BICUBIC;
+ } else {
+ std::cerr << "SPMeshGradient::set(): invalid value " << value << std::endl;
+ }
+ this->type_set = TRUE;
+ } else {
+ // std::cout << "SPMeshGradient::set() No value " << std::endl;
+ this->type = SP_MESH_TYPE_COONS;
+ this->type_set = FALSE;
+ }
+
+ this->requestModified(SP_OBJECT_MODIFIED_FLAG);
+ break;
+
+ default:
+ SPGradient::set(key, value);
+ break;
+ }
+
+#ifdef OBJECT_TRACE
+ objectTrace( "SPMeshGradient::set", false );
+#endif
+}
+
+/**
+ * Write mesh gradient attributes to associated repr.
+ */
+Inkscape::XML::Node* SPMeshGradient::write(Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, guint flags) {
+#ifdef OBJECT_TRACE
+ objectTrace( "SPMeshGradient::write", false );
+#endif
+
+ if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) {
+ repr = xml_doc->createElement("svg:meshgradient");
+ }
+
+ if ((flags & SP_OBJECT_WRITE_ALL) || this->x._set) {
+ repr->setAttributeSvgDouble("x", this->x.computed);
+ }
+
+ if ((flags & SP_OBJECT_WRITE_ALL) || this->y._set) {
+ repr->setAttributeSvgDouble("y", this->y.computed);
+ }
+
+ if ((flags & SP_OBJECT_WRITE_ALL) || this->type_set) {
+ switch (this->type) {
+ case SP_MESH_TYPE_COONS:
+ repr->setAttribute("type", "coons");
+ break;
+ case SP_MESH_TYPE_BICUBIC:
+ repr->setAttribute("type", "bicubic");
+ break;
+ default:
+ // Do nothing
+ break;
+ }
+ }
+
+ SPGradient::write(xml_doc, repr, flags);
+
+#ifdef OBJECT_TRACE
+ objectTrace( "SPMeshGradient::write", false );
+#endif
+ return repr;
+}
+
+cairo_pattern_t* SPMeshGradient::pattern_new(cairo_t * /*ct*/,
+ Geom::OptRect const &bbox,
+ double opacity)
+{
+ using Geom::X;
+ using Geom::Y;
+
+#ifdef MESH_DEBUG
+ std::cout << "sp_meshgradient_create_pattern: " << (*bbox) << " " << opacity << std::endl;
+#endif
+
+ this->ensureArray();
+
+ cairo_pattern_t *cp = nullptr;
+
+ SPMeshNodeArray* my_array = &array;
+
+ if( type_set ) {
+ switch (type) {
+ case SP_MESH_TYPE_COONS:
+ // std::cout << "SPMeshGradient::pattern_new: Coons" << std::endl;
+ break;
+ case SP_MESH_TYPE_BICUBIC:
+ array.bicubic( &array_smoothed, type );
+ my_array = &array_smoothed;
+ break;
+ }
+ }
+
+ cp = cairo_pattern_create_mesh();
+
+ for( unsigned int i = 0; i < my_array->patch_rows(); ++i ) {
+ for( unsigned int j = 0; j < my_array->patch_columns(); ++j ) {
+
+ SPMeshPatchI patch( &(my_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_mesh_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_mesh_create_pattern: tensor " << k
+ // << " set to " << t << "." << std::endl;
+ } else {
+ // Geom::Point t = patch.coonsTensorPoint(k);
+ //std::cout << " sp_mesh_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());
+
+ /*
+ 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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