X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=src%2Fgradient-chemistry.cpp;h=9fade37ecdcb042f5b430aad95b9989a6ccfc84d;hb=8d358698ecbf192ba7c6dc05d4f7de7592753d9f;hp=d3b8f79114cd44ba3ddc9c3def17b4a8a6dda6d0;hpb=569ef8f6dbacc8a8b0b933d02a806c2e091ce02b;p=inkscape.git diff --git a/src/gradient-chemistry.cpp b/src/gradient-chemistry.cpp index d3b8f7911..9fade37ec 100644 --- a/src/gradient-chemistry.cpp +++ b/src/gradient-chemistry.cpp @@ -30,9 +30,12 @@ #include "sp-text.h" #include "sp-tspan.h" #include +#include #include "xml/repr.h" #include "svg/svg.h" #include "svg/svg-color.h" +#include "svg/css-ostringstream.h" +#include "prefs-utils.h" // Terminology: @@ -72,7 +75,7 @@ sp_gradient_ensure_vector_normalized(SPGradient *gr) /* If gr hrefs some other gradient, remove the href */ if (gr->ref->getObject()) { /* We are hrefing someone, so require flattening */ - SP_OBJECT(gr)->updateRepr(((SPObject *) gr)->repr, SP_OBJECT_WRITE_EXT | SP_OBJECT_WRITE_ALL); + SP_OBJECT(gr)->updateRepr(SP_OBJECT_WRITE_EXT | SP_OBJECT_WRITE_ALL); sp_gradient_repr_set_link(SP_OBJECT_REPR(gr), NULL); } @@ -233,6 +236,10 @@ sp_gradient_fork_private_if_necessary(SPGradient *gr, SPGradient *vector, SPGradient * sp_gradient_fork_vector_if_necessary (SPGradient *gr) { + // Some people actually prefer their gradient vectors to be shared... + if (prefs_get_int_attribute("options.forkgradientvectors", "value", 1) == 0) + return gr; + if (SP_OBJECT_HREFCOUNT(gr) > 1) { SPDocument *doc = SP_OBJECT_DOCUMENT(gr); Inkscape::XML::Document *xml_doc = sp_document_repr_doc(doc); @@ -360,7 +367,7 @@ sp_gradient_convert_to_userspace(SPGradient *gr, SPItem *item, gchar const *prop * transformation from bounding box space to user space. */ NR::Matrix skew = bbox2user; - double exp = skew.expansion(); + double exp = NR::expansion(skew); skew[0] /= exp; skew[1] /= exp; skew[2] /= exp; @@ -391,7 +398,7 @@ sp_gradient_convert_to_userspace(SPGradient *gr, SPItem *item, gchar const *prop // converted points in userspace coords NR::Point c_u = c_b * point_convert; NR::Point f_u = f_b * point_convert; - double r_u = r_b * point_convert.expansion(); + double r_u = r_b * NR::expansion(point_convert); sp_repr_set_svg_double(repr, "cx", c_u[NR::X]); sp_repr_set_svg_double(repr, "cy", c_u[NR::Y]); @@ -502,11 +509,11 @@ sp_prev_stop(SPStop *stop, SPGradient *gradient) 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; + 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* @@ -514,24 +521,89 @@ 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) - return stop; - } - return 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 = sp_first_stop (gradient); + + // 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 = sp_next_stop (stop); + } - return stop; + 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); + + return SP_RGBA32_U_COMPOSE (r, g, b, a); } +SPStop * +sp_vector_add_stop (SPGradient *vector, SPStop* prev_stop, SPStop* next_stop, gfloat offset) +{ + Inkscape::XML::Node *new_stop_repr = NULL; + new_stop_repr = SP_OBJECT_REPR(prev_stop)->duplicate(SP_OBJECT_REPR(vector)->document()); + SP_OBJECT_REPR(vector)->addChild(new_stop_repr, SP_OBJECT_REPR(prev_stop)); + + SPStop *newstop = (SPStop *) SP_OBJECT_DOCUMENT(vector)->getObjectByRepr(new_stop_repr); + newstop->offset = offset; + sp_repr_set_css_double( SP_OBJECT_REPR(newstop), "offset", (double)offset); + guint32 const c1 = sp_stop_get_rgba32(prev_stop); + guint32 const c2 = sp_stop_get_rgba32(next_stop); + guint32 cnew = average_color (c1, c2, (offset - prev_stop->offset) / (next_stop->offset - prev_stop->offset)); + Inkscape::CSSOStringStream os; + gchar c[64]; + sp_svg_write_color (c, sizeof(c), cnew); + gdouble opacity = (gdouble) SP_RGBA32_A_F (cnew); + os << "stop-color:" << c << ";stop-opacity:" << opacity <<";"; + SP_OBJECT_REPR (newstop)->setAttribute("style", os.str().c_str()); + Inkscape::GC::release(new_stop_repr); + + return newstop; +} void sp_item_gradient_edit_stop (SPItem *item, guint point_type, guint point_i, bool fill_or_stroke) @@ -738,21 +810,6 @@ sp_item_gradient_reverse_vector (SPItem *item, bool fill_or_stroke) } -// FIXME: make general global function -static double -get_offset_between_points (NR::Point p, NR::Point begin, NR::Point end) -{ - double length = NR::L2(end - begin); - NR::Point be = (end - begin) / length; - double r = NR::dot(p - begin, be); - - if (r < 0.0) return 0.0; - if (r > length) return 1.0; - - return (r / length); -} - - /** Set the position of point point_type of the gradient applied to item (either fill_or_stroke) to p_w (in desktop coordinates). Write_repr if you want the change to become permanent. @@ -767,7 +824,7 @@ sp_item_gradient_set_coords (SPItem *item, guint point_type, guint point_i, NR:: gradient = sp_gradient_convert_to_userspace (gradient, item, fill_or_stroke? "fill" : "stroke"); - NR::Matrix i2d = sp_item_i2d_affine (item); + NR::Matrix i2d = from_2geom(sp_item_i2d_affine (item)); NR::Point p = p_w * i2d.inverse(); p *= (gradient->gradientTransform).inverse(); // now p is in gradient's original coordinates @@ -1044,7 +1101,7 @@ sp_item_gradient_get_coords (SPItem *item, guint point_type, guint point_i, bool bbox->min()[NR::X], bbox->min()[NR::Y]); } } - p *= NR::Matrix(gradient->gradientTransform) * sp_item_i2d_affine(item); + p *= NR::Matrix(gradient->gradientTransform) * from_2geom(sp_item_i2d_affine(item)); return p; } @@ -1165,7 +1222,7 @@ sp_document_default_gradient_vector(SPDocument *document, guint32 color) Inkscape::XML::Node *stop = xml_doc->createElement("svg:stop"); gchar b[64]; - sp_svg_write_color(b, 64, color); + sp_svg_write_color(b, sizeof(b), color); { gchar *t = g_strdup_printf("stop-color:%s;stop-opacity:1;", b);