diff options
Diffstat (limited to 'src/gradient-chemistry.cpp')
| -rw-r--r-- | src/gradient-chemistry.cpp | 336 |
1 files changed, 136 insertions, 200 deletions
diff --git a/src/gradient-chemistry.cpp b/src/gradient-chemistry.cpp index 4abd7483f..c95c1b2c5 100644 --- a/src/gradient-chemistry.cpp +++ b/src/gradient-chemistry.cpp @@ -1,5 +1,3 @@ -#define __SP_GRADIENT_CHEMISTRY_C__ - /* * Various utility methods for gradients * @@ -7,7 +5,9 @@ * 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. @@ -62,7 +62,7 @@ sp_gradient_ensure_vector_normalized(SPGradient *gr) if (gr->state == SP_GRADIENT_STATE_VECTOR) return gr; /* Fail, if we have wrong state set */ if (gr->state != SP_GRADIENT_STATE_UNKNOWN) { - g_warning("file %s: line %d: Cannot normalize private gradient to vector (%s)", __FILE__, __LINE__, SP_OBJECT_ID(gr)); + g_warning("file %s: line %d: Cannot normalize private gradient to vector (%s)", __FILE__, __LINE__, gr->getId()); return NULL; } @@ -190,7 +190,7 @@ sp_gradient_fork_private_if_necessary(SPGradient *gr, SPGradient *vector, // Check the number of uses of the gradient within this object; // if we are private and there are no other users, - if (SP_OBJECT_HREFCOUNT(gr) <= count_gradient_hrefs(user, gr)) { + if (!vector->isSwatch() && (SP_OBJECT_HREFCOUNT(gr) <= count_gradient_hrefs(user, gr))) { // check vector if ( gr != vector && gr->ref->getObject() != vector ) { /* our href is not the vector, and vector is different from gr; relink */ @@ -264,7 +264,7 @@ sp_gradient_fork_vector_if_necessary (SPGradient *gr) 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) { @@ -482,107 +482,45 @@ sp_item_gradient (SPItem *item, bool fill_or_stroke) 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; @@ -636,7 +574,7 @@ sp_item_gradient_edit_stop (SPItem *item, guint point_type, guint point_i, bool 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: @@ -711,7 +649,7 @@ sp_item_gradient_stop_set_style (SPItem *item, guint point_type, guint point_i, if (!gradient || !SP_IS_GRADIENT(gradient)) return; - SPGradient *vector = sp_gradient_get_vector (gradient, false); + SPGradient *vector = gradient->getVector(); if (!vector) // orphan! return; @@ -726,7 +664,7 @@ sp_item_gradient_stop_set_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) { sp_repr_css_change (SP_OBJECT_REPR (first), stop, "style"); } @@ -743,7 +681,7 @@ sp_item_gradient_stop_set_style (SPItem *item, guint point_type, guint point_i, } } break; - + case POINT_LG_MID: case POINT_RG_MID1: case POINT_RG_MID2: @@ -754,7 +692,7 @@ sp_item_gradient_stop_set_style (SPItem *item, guint point_type, guint point_i, } } break; - + default: break; } @@ -767,7 +705,7 @@ sp_item_gradient_reverse_vector (SPItem *item, bool fill_or_stroke) 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 * @@ -1019,8 +958,9 @@ sp_item_gradient_get_vector (SPItem *item, bool fill_or_stroke) { 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; } } @@ -1140,15 +1080,16 @@ sp_item_set_gradient(SPItem *item, SPGradient *gr, SPGradientType type, bool is_ /* Current fill style is the gradient of the required type */ SPGradient *current = SP_GRADIENT(ps); - //g_print("hrefcount %d count %d\n", SP_OBJECT_HREFCOUNT(ig), count_gradient_hrefs(SP_OBJECT(item), ig)); + //g_message("hrefcount %d count %d\n", SP_OBJECT_HREFCOUNT(current), count_gradient_hrefs(SP_OBJECT(item), current)); - if (SP_OBJECT_HREFCOUNT(current) == 1 || - SP_OBJECT_HREFCOUNT(current) == count_gradient_hrefs(SP_OBJECT(item), current)) { + if (!current->isSwatch() + && (SP_OBJECT_HREFCOUNT(current) == 1 || + SP_OBJECT_HREFCOUNT(current) == count_gradient_hrefs(SP_OBJECT(item), current))) { // 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 +1125,20 @@ 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 = SP_OBJECT_ID(link); - 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 +1222,7 @@ 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); } |
