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index d669fa378423adf446a7b0c93c7ba3479698cc48..b2e68c345b613a4140c35c33c90713b2269deeff 100644 (file)
-#define __SP_GRADIENT_CHEMISTRY_C__
-
/*
* Various utility methods for gradients
*
* Lauris Kaplinski <lauris@kaplinski.com>
* bulia byak
* Johan Engelen <j.b.c.engelen@ewi.utwente.nl>
+ * Jon A. Cruz <jon@joncruz.org>
*
+ * Copyright (C) 2010 Authors
* Copyright (C) 2007 Johan Engelen
* Copyright (C) 2001-2005 authors
* Copyright (C) 2001 Ximian, Inc.
SPGradient *
sp_gradient_get_forked_vector_if_necessary(SPGradient *gradient, bool force_vector)
{
- SPGradient *vector = sp_gradient_get_vector (gradient, force_vector);
+ SPGradient *vector = gradient->getVector(force_vector);
vector = sp_gradient_fork_vector_if_necessary (vector);
if ( gradient != vector && gradient->ref->getObject() != vector ) {
sp_gradient_repr_set_link(SP_OBJECT_REPR(gradient), vector);
@@ -336,7 +336,7 @@ sp_gradient_convert_to_userspace(SPGradient *gr, SPItem *item, gchar const *prop
g_return_val_if_fail(SP_IS_GRADIENT(gr), NULL);
// First, fork it if it is shared
- gr = sp_gradient_fork_private_if_necessary(gr, sp_gradient_get_vector(gr, FALSE),
+ gr = sp_gradient_fork_private_if_necessary(gr, gr->getVector(),
SP_IS_RADIALGRADIENT(gr) ? SP_GRADIENT_TYPE_RADIAL : SP_GRADIENT_TYPE_LINEAR, SP_OBJECT(item));
if (gr->units == SP_GRADIENT_UNITS_OBJECTBOUNDINGBOX) {
return gradient;
}
-
-SPStop*
-sp_first_stop(SPGradient *gradient)
-{
- for (SPObject *ochild = sp_object_first_child(gradient); ochild != NULL; ochild = SP_OBJECT_NEXT(ochild)) {
- if (SP_IS_STOP (ochild))
- return SP_STOP(ochild);
- }
- return NULL;
-}
-
-SPStop*
-sp_prev_stop(SPStop *stop, SPGradient *gradient)
-{
- if (sp_object_first_child(SP_OBJECT(gradient)) == SP_OBJECT(stop))
- return NULL;
- SPObject *found = NULL;
- for ( SPObject *ochild = sp_object_first_child(SP_OBJECT(gradient)) ; ochild != NULL ; ochild = SP_OBJECT_NEXT(ochild) ) {
- if (SP_IS_STOP (ochild)) {
- found = ochild;
- }
- if (SP_OBJECT_NEXT(ochild) == SP_OBJECT(stop) || SP_OBJECT(ochild) == SP_OBJECT(stop)) {
- break;
- }
- }
- return SP_STOP(found);
-}
-
-SPStop*
-sp_next_stop(SPStop *stop)
-{
- for (SPObject *ochild = SP_OBJECT_NEXT(stop); ochild != NULL; ochild = SP_OBJECT_NEXT(ochild)) {
- if (SP_IS_STOP (ochild))
- return SP_STOP(ochild);
- }
- return NULL;
-}
-
-SPStop*
-sp_last_stop(SPGradient *gradient)
+SPStop* sp_last_stop(SPGradient *gradient)
{
- for (SPStop *stop = sp_first_stop (gradient); stop != NULL; stop = sp_next_stop (stop)) {
- if (sp_next_stop (stop) == NULL)
+ for (SPStop *stop = gradient->getFirstStop(); stop != NULL; stop = stop->getNextStop()) {
+ if (stop->getNextStop() == NULL)
return stop;
}
return NULL;
-}
-
-guint
-sp_number_of_stops(SPGradient *gradient)
-{
- guint n = 0;
- for (SPStop *stop = sp_first_stop (gradient); stop != NULL; stop = sp_next_stop (stop)) {
- if (sp_next_stop (stop) == NULL)
- return n;
- n ++;
- }
- return n;
-}
-
-guint
-sp_number_of_stops_before_stop(SPGradient *gradient, SPStop *target)
-{
- guint n = 0;
- for (SPStop *stop = sp_first_stop (gradient); stop != NULL; stop = sp_next_stop (stop)) {
- if (stop == target)
- return n;
- n ++;
- }
- return n;
-}
-
+}
SPStop*
sp_get_stop_i(SPGradient *gradient, guint stop_i)
-{
- SPStop *stop = sp_first_stop (gradient);
+{
+ SPStop *stop = gradient->getFirstStop();
- // if this is valid but weird gradient without an offset-zero stop element,
+ // if this is valid but weird gradient without an offset-zero stop element,
// inkscape has created a handle for the start of gradient anyway,
// so when it asks for stop N that corresponds to stop element N-1
if (stop->offset != 0)
stop_i --;
-
- for (guint i=0; i < stop_i; i++) {
- if (!stop) return NULL;
- stop = sp_next_stop (stop);
- }
-
+
+ for (guint i = 0; i < stop_i; i++) {
+ if (!stop) {
+ return NULL;
+ }
+ stop = stop->getNextStop();
+ }
+
return stop;
}
guint32
average_color (guint32 c1, guint32 c2, gdouble p)
{
- guint32 r = (guint32) (SP_RGBA32_R_U (c1) * (1 - p) + SP_RGBA32_R_U (c2) * p);
- guint32 g = (guint32) (SP_RGBA32_G_U (c1) * (1 - p) + SP_RGBA32_G_U (c2) * p);
- guint32 b = (guint32) (SP_RGBA32_B_U (c1) * (1 - p) + SP_RGBA32_B_U (c2) * p);
- guint32 a = (guint32) (SP_RGBA32_A_U (c1) * (1 - p) + SP_RGBA32_A_U (c2) * p);
+ guint32 r = (guint32) (SP_RGBA32_R_U (c1) * (1 - p) + SP_RGBA32_R_U (c2) * p);
+ guint32 g = (guint32) (SP_RGBA32_G_U (c1) * (1 - p) + SP_RGBA32_G_U (c2) * p);
+ guint32 b = (guint32) (SP_RGBA32_B_U (c1) * (1 - p) + SP_RGBA32_B_U (c2) * p);
+ guint32 a = (guint32) (SP_RGBA32_A_U (c1) * (1 - p) + SP_RGBA32_A_U (c2) * p);
- return SP_RGBA32_U_COMPOSE (r, g, b, a);
+ return SP_RGBA32_U_COMPOSE (r, g, b, a);
}
SPStop *
@@ -617,13 +555,13 @@ sp_item_gradient_edit_stop (SPItem *item, guint point_type, guint point_i, bool
if (!gradient || !SP_IS_GRADIENT(gradient))
return;
- SPGradient *vector = sp_gradient_get_vector (gradient, false);
+ SPGradient *vector = gradient->getVector();
switch (point_type) {
case POINT_LG_BEGIN:
case POINT_RG_CENTER:
case POINT_RG_FOCUS:
{
- GtkWidget *dialog = sp_gradient_vector_editor_new (vector, sp_first_stop (vector));
+ GtkWidget *dialog = sp_gradient_vector_editor_new (vector, vector->getFirstStop());
gtk_widget_show (dialog);
}
break;
gtk_widget_show (dialog);
}
break;
-
+
case POINT_LG_MID:
case POINT_RG_MID1:
case POINT_RG_MID2:
@@ -658,7 +596,7 @@ sp_item_gradient_stop_query_style (SPItem *item, guint point_type, guint point_i
if (!gradient || !SP_IS_GRADIENT(gradient))
return 0;
- SPGradient *vector = sp_gradient_get_vector (gradient, false);
+ SPGradient *vector = gradient->getVector();
if (!vector) // orphan!
return 0; // what else to do?
@@ -668,7 +606,7 @@ sp_item_gradient_stop_query_style (SPItem *item, guint point_type, guint point_i
case POINT_RG_CENTER:
case POINT_RG_FOCUS:
{
- SPStop *first = sp_first_stop (vector);
+ SPStop *first = vector->getFirstStop();
if (first) {
return sp_stop_get_rgba32(first);
}
@@ -685,7 +623,7 @@ sp_item_gradient_stop_query_style (SPItem *item, guint point_type, guint point_i
}
}
break;
-
+
case POINT_LG_MID:
case POINT_RG_MID1:
case POINT_RG_MID2:
if (!gradient || !SP_IS_GRADIENT(gradient))
return;
- SPGradient *vector = sp_gradient_get_vector (gradient, false);
+ SPGradient *vector = gradient->getVector();
if (!vector) // orphan!
return;
case POINT_RG_CENTER:
case POINT_RG_FOCUS:
{
- SPStop *first = sp_first_stop (vector);
+ SPStop *first = vector->getFirstStop();
if (first) {
sp_repr_css_change (SP_OBJECT_REPR (first), stop, "style");
}
}
}
break;
-
+
case POINT_LG_MID:
case POINT_RG_MID1:
case POINT_RG_MID2:
}
}
break;
-
+
default:
break;
}
if (!gradient || !SP_IS_GRADIENT(gradient))
return;
- SPGradient *vector = sp_gradient_get_vector (gradient, false);
+ SPGradient *vector = gradient->getVector();
if (!vector) // orphan!
return;
@@ -873,9 +811,9 @@ sp_item_gradient_set_coords (SPItem *item, guint point_type, guint point_i, Geom
} else {
SP_OBJECT (gradient)->requestModified(SP_OBJECT_MODIFIED_FLAG);
}
- break;
+ break;
case POINT_LG_MID:
- {
+ {
// using X-coordinates only to determine the offset, assuming p has been snapped to the vector from begin to end.
double offset = get_offset_between_points (p, Geom::Point(lg->x1.computed, lg->y1.computed), Geom::Point(lg->x2.computed, lg->y2.computed));
SPGradient *vector = sp_gradient_get_forked_vector_if_necessary (lg, false);
@@ -890,10 +828,10 @@ sp_item_gradient_set_coords (SPItem *item, guint point_type, guint point_i, Geom
}
}
break;
- default:
- break;
- }
- } else if (SP_IS_RADIALGRADIENT(gradient)) {
+ default:
+ break;
+ }
+ } else if (SP_IS_RADIALGRADIENT(gradient)) {
SPRadialGradient *rg = SP_RADIALGRADIENT(gradient);
Geom::Point c (rg->cx.computed, rg->cy.computed);
Geom::Point c_w = c * gradient->gradientTransform * i2d; // now in desktop coords
@@ -904,66 +842,66 @@ sp_item_gradient_set_coords (SPItem *item, guint point_type, guint point_i, Geom
Geom::Matrix new_transform;
bool transform_set = false;
- switch (point_type) {
- case POINT_RG_CENTER:
- rg->fx.computed = p[Geom::X] + (rg->fx.computed - rg->cx.computed);
- rg->fy.computed = p[Geom::Y] + (rg->fy.computed - rg->cy.computed);
- rg->cx.computed = p[Geom::X];
- rg->cy.computed = p[Geom::Y];
- if (write_repr) {
- sp_repr_set_svg_double(repr, "fx", rg->fx.computed);
- sp_repr_set_svg_double(repr, "fy", rg->fy.computed);
- sp_repr_set_svg_double(repr, "cx", rg->cx.computed);
- sp_repr_set_svg_double(repr, "cy", rg->cy.computed);
- } else {
- SP_OBJECT (gradient)->requestModified(SP_OBJECT_MODIFIED_FLAG);
- }
- break;
- case POINT_RG_FOCUS:
- rg->fx.computed = p[Geom::X];
- rg->fy.computed = p[Geom::Y];
- if (write_repr) {
- sp_repr_set_svg_double(repr, "fx", rg->fx.computed);
- sp_repr_set_svg_double(repr, "fy", rg->fy.computed);
- } else {
- SP_OBJECT (gradient)->requestModified(SP_OBJECT_MODIFIED_FLAG);
- }
- break;
- case POINT_RG_R1:
- {
+ switch (point_type) {
+ case POINT_RG_CENTER:
+ rg->fx.computed = p[Geom::X] + (rg->fx.computed - rg->cx.computed);
+ rg->fy.computed = p[Geom::Y] + (rg->fy.computed - rg->cy.computed);
+ rg->cx.computed = p[Geom::X];
+ rg->cy.computed = p[Geom::Y];
+ if (write_repr) {
+ sp_repr_set_svg_double(repr, "fx", rg->fx.computed);
+ sp_repr_set_svg_double(repr, "fy", rg->fy.computed);
+ sp_repr_set_svg_double(repr, "cx", rg->cx.computed);
+ sp_repr_set_svg_double(repr, "cy", rg->cy.computed);
+ } else {
+ SP_OBJECT (gradient)->requestModified(SP_OBJECT_MODIFIED_FLAG);
+ }
+ break;
+ case POINT_RG_FOCUS:
+ rg->fx.computed = p[Geom::X];
+ rg->fy.computed = p[Geom::Y];
+ if (write_repr) {
+ sp_repr_set_svg_double(repr, "fx", rg->fx.computed);
+ sp_repr_set_svg_double(repr, "fy", rg->fy.computed);
+ } else {
+ SP_OBJECT (gradient)->requestModified(SP_OBJECT_MODIFIED_FLAG);
+ }
+ break;
+ case POINT_RG_R1:
+ {
Geom::Point r1_w = (c + Geom::Point(rg->r.computed, 0)) * gradient->gradientTransform * i2d;
- double r1_angle = Geom::atan2(r1_w - c_w);
- double move_angle = Geom::atan2(p_w - c_w) - r1_angle;
- double move_stretch = Geom::L2(p_w - c_w) / Geom::L2(r1_w - c_w);
-
- Geom::Matrix move = Geom::Matrix (Geom::Translate (-c_w)) *
- Geom::Matrix (Geom::Rotate(-r1_angle)) *
- Geom::Matrix (Geom::Scale(move_stretch, scale? move_stretch : 1)) *
- Geom::Matrix (Geom::Rotate(r1_angle)) *
- Geom::Matrix (Geom::Rotate(move_angle)) *
- Geom::Matrix (Geom::Translate (c_w));
-
- new_transform = gradient->gradientTransform * i2d * move * i2d.inverse();
- transform_set = true;
-
- break;
- }
- case POINT_RG_R2:
- {
- Geom::Point r2_w = (c + Geom::Point(0, -rg->r.computed)) * gradient->gradientTransform * i2d;
- double r2_angle = Geom::atan2(r2_w - c_w);
- double move_angle = Geom::atan2(p_w - c_w) - r2_angle;
- double move_stretch = Geom::L2(p_w - c_w) / Geom::L2(r2_w - c_w);
-
- Geom::Matrix move = Geom::Matrix (Geom::Translate (-c_w)) *
- Geom::Matrix (Geom::Rotate(-r2_angle)) *
- Geom::Matrix (Geom::Scale(move_stretch, scale? move_stretch : 1)) *
- Geom::Matrix (Geom::Rotate(r2_angle)) *
- Geom::Matrix (Geom::Rotate(move_angle)) *
- Geom::Matrix (Geom::Translate (c_w));
-
- new_transform = gradient->gradientTransform * i2d * move * i2d.inverse();
- transform_set = true;
+ double r1_angle = Geom::atan2(r1_w - c_w);
+ double move_angle = Geom::atan2(p_w - c_w) - r1_angle;
+ double move_stretch = Geom::L2(p_w - c_w) / Geom::L2(r1_w - c_w);
+
+ Geom::Matrix move = Geom::Matrix (Geom::Translate (-c_w)) *
+ Geom::Matrix (Geom::Rotate(-r1_angle)) *
+ Geom::Matrix (Geom::Scale(move_stretch, scale? move_stretch : 1)) *
+ Geom::Matrix (Geom::Rotate(r1_angle)) *
+ Geom::Matrix (Geom::Rotate(move_angle)) *
+ Geom::Matrix (Geom::Translate (c_w));
+
+ new_transform = gradient->gradientTransform * i2d * move * i2d.inverse();
+ transform_set = true;
+
+ break;
+ }
+ case POINT_RG_R2:
+ {
+ Geom::Point r2_w = (c + Geom::Point(0, -rg->r.computed)) * gradient->gradientTransform * i2d;
+ double r2_angle = Geom::atan2(r2_w - c_w);
+ double move_angle = Geom::atan2(p_w - c_w) - r2_angle;
+ double move_stretch = Geom::L2(p_w - c_w) / Geom::L2(r2_w - c_w);
+
+ Geom::Matrix move = Geom::Matrix (Geom::Translate (-c_w)) *
+ Geom::Matrix (Geom::Rotate(-r2_angle)) *
+ Geom::Matrix (Geom::Scale(move_stretch, scale? move_stretch : 1)) *
+ Geom::Matrix (Geom::Rotate(r2_angle)) *
+ Geom::Matrix (Geom::Rotate(move_angle)) *
+ Geom::Matrix (Geom::Translate (c_w));
+
+ new_transform = gradient->gradientTransform * i2d * move * i2d.inverse();
+ transform_set = true;
break;
}
@@ -974,7 +912,7 @@ sp_item_gradient_set_coords (SPItem *item, guint point_type, guint point_i, Geom
double offset = get_offset_between_points (p, start, end);
SPGradient *vector = sp_gradient_get_forked_vector_if_necessary (rg, false);
sp_gradient_ensure_vector(rg);
- rg->vector.stops.at(point_i).offset = offset;
+ rg->vector.stops.at(point_i).offset = offset;
SPStop* stopi = sp_get_stop_i(vector, point_i);
stopi->offset = offset;
if (write_repr) {
@@ -999,19 +937,20 @@ sp_item_gradient_set_coords (SPItem *item, guint point_type, guint point_i, Geom
SP_OBJECT (stopi)->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
}
break;
+ }
+
+ if (transform_set) {
+ gradient->gradientTransform = new_transform;
+ gradient->gradientTransform_set = TRUE;
+ if (write_repr) {
+ gchar *s=sp_svg_transform_write(gradient->gradientTransform);
+ SP_OBJECT_REPR(gradient)->setAttribute("gradientTransform", s);
+ g_free(s);
+ } else {
+ SP_OBJECT (gradient)->requestModified(SP_OBJECT_MODIFIED_FLAG);
}
- if (transform_set) {
- gradient->gradientTransform = new_transform;
- gradient->gradientTransform_set = TRUE;
- if (write_repr) {
- gchar *s=sp_svg_transform_write(gradient->gradientTransform);
- SP_OBJECT_REPR(gradient)->setAttribute("gradientTransform", s);
- g_free(s);
- } else {
- SP_OBJECT (gradient)->requestModified(SP_OBJECT_MODIFIED_FLAG);
- }
- }
- }
+ }
+ }
}
SPGradient *
{
SPGradient *gradient = sp_item_gradient (item, fill_or_stroke);
- if (gradient)
- return sp_gradient_get_vector (gradient, false);
+ if (gradient) {
+ return gradient->getVector();
+ }
return NULL;
}
@@ -1060,7 +1000,7 @@ sp_item_gradient_get_coords (SPItem *item, guint point_type, guint point_i, bool
p = Geom::Point (lg->x2.computed, lg->y2.computed);
break;
case POINT_LG_MID:
- {
+ {
gdouble offset = lg->vector.stops.at(point_i).offset;
p = (1-offset) * Geom::Point(lg->x1.computed, lg->y1.computed) + offset * Geom::Point(lg->x2.computed, lg->y2.computed);
}
@@ -1085,13 +1025,13 @@ sp_item_gradient_get_coords (SPItem *item, guint point_type, guint point_i, bool
{
gdouble offset = rg->vector.stops.at(point_i).offset;
p = (1-offset) * Geom::Point (rg->cx.computed, rg->cy.computed) + offset * Geom::Point(rg->cx.computed + rg->r.computed, rg->cy.computed);
- }
+ }
break;
case POINT_RG_MID2:
{
gdouble offset = rg->vector.stops.at(point_i).offset;
p = (1-offset) * Geom::Point (rg->cx.computed, rg->cy.computed) + offset * Geom::Point(rg->cx.computed, rg->cy.computed - rg->r.computed);
- }
+ }
break;
}
}
@@ -1148,7 +1088,7 @@ sp_item_set_gradient(SPItem *item, SPGradient *gr, SPGradientType type, bool is_
// current is private and it's either used once, or all its uses are by children of item;
// so just change its href to vector
- if ( current != gr && sp_gradient_get_vector(current, false) != gr ) {
+ if ( current != gr && current->getVector() != gr ) {
/* href is not the vector */
sp_gradient_repr_set_link(SP_OBJECT_REPR(current), gr);
}
@@ -1184,25 +1124,20 @@ sp_item_set_gradient(SPItem *item, SPGradient *gr, SPGradientType type, bool is_
}
}
-static void
-sp_gradient_repr_set_link(Inkscape::XML::Node *repr, SPGradient *link)
+static void sp_gradient_repr_set_link(Inkscape::XML::Node *repr, SPGradient *link)
{
g_return_if_fail(repr != NULL);
- g_return_if_fail(link != NULL);
- g_return_if_fail(SP_IS_GRADIENT(link));
+ if (link) {
+ g_return_if_fail(SP_IS_GRADIENT(link));
+ }
- gchar *ref;
if (link) {
- gchar const *id = link->getId();
- size_t const len = strlen(id);
- ref = (gchar*) alloca(len + 2);
- *ref = '#';
- memcpy(ref + 1, id, len + 1);
+ Glib::ustring ref("#");
+ ref += link->getId();
+ repr->setAttribute("xlink:href", ref.c_str());
} else {
- ref = NULL;
+ repr->setAttribute("xlink:href", 0);
}
-
- repr->setAttribute("xlink:href", ref);
}
/*
@@ -1286,7 +1221,7 @@ sp_gradient_vector_for_object(SPDocument *const doc, SPDesktop *const desktop,
if (paint.isPaintserver()) {
SPObject *server = is_fill? SP_OBJECT_STYLE_FILL_SERVER(o) : SP_OBJECT_STYLE_STROKE_SERVER(o);
if (SP_IS_GRADIENT (server)) {
- return sp_gradient_get_vector(SP_GRADIENT (server), TRUE);
+ return SP_GRADIENT(server)->getVector(true);
} else {
rgba = sp_desktop_get_color(desktop, is_fill);
}