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Diffstat (limited to 'plug-ins/gfig/gfig-line.c')
| -rw-r--r-- | plug-ins/gfig/gfig-line.c | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/plug-ins/gfig/gfig-line.c b/plug-ins/gfig/gfig-line.c new file mode 100644 index 0000000..f842d7b --- /dev/null +++ b/plug-ins/gfig/gfig-line.c @@ -0,0 +1,225 @@ +/* + * Copyright (C) 1995 Spencer Kimball and Peter Mattis + * + * This is a plug-in for GIMP. + * + * Generates images containing vector type drawings. + * + * Copyright (C) 1997 Andy Thomas alt@picnic.demon.co.uk + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <https://www.gnu.org/licenses/>. + * + */ + +#include "config.h" + +#include <libgimp/gimp.h> +#include <libgimp/gimpui.h> + +#include "gfig.h" +#include "gfig-dobject.h" +#include "gfig-line.h" + +#include "libgimp/stdplugins-intl.h" + + +static GfigObject *d_copy_line (GfigObject *obj); +static void d_draw_line (GfigObject *obj, + cairo_t *cr); +static void d_paint_line (GfigObject *obj); + +static void d_update_line (GdkPoint *pnt); + +static GfigObject * +d_copy_line (GfigObject *obj) +{ + GfigObject *nl; + + g_assert (obj->type == LINE); + + nl = d_new_object (LINE, obj->points->pnt.x, obj->points->pnt.y); + nl->points->next = d_copy_dobjpoints (obj->points->next); + + return nl; +} + +static void +d_draw_line (GfigObject *obj, + cairo_t *cr) +{ + DobjPoints *spnt; + DobjPoints *epnt; + + spnt = obj->points; + + if (!spnt) + return; /* End-of-line */ + + epnt = spnt->next; + + while (spnt && epnt) + { + draw_sqr (&spnt->pnt, obj == gfig_context->selected_obj, cr); + /* Go around all the points drawing a line from one to the next */ + gfig_draw_line (spnt->pnt.x, spnt->pnt.y, epnt->pnt.x, epnt->pnt.y, cr); + spnt = epnt; + epnt = epnt->next; + } + if (obj_creating == obj) + draw_circle (&spnt->pnt, TRUE, cr); + else + draw_sqr (&spnt->pnt, obj == gfig_context->selected_obj, cr); +} + +static void +d_paint_line (GfigObject *obj) +{ + DobjPoints *spnt; + gdouble *line_pnts; + gint seg_count = 0; + gint i = 0; + + for (spnt = obj->points; spnt; spnt = spnt->next) + seg_count++; + + if (!seg_count) + return; /* no-line */ + + line_pnts = g_new0 (gdouble, 2 * seg_count + 1); + + /* Go around all the points drawing a line from one to the next */ + for (spnt = obj->points; spnt; spnt = spnt->next) + { + line_pnts[i++] = spnt->pnt.x; + line_pnts[i++] = spnt->pnt.y; + } + + /* Scale before drawing */ + if (selvals.scaletoimage) + scale_to_original_xy (&line_pnts[0], i/2); + else + scale_to_xy (&line_pnts[0], i/2); + + /* One go */ + if (obj->style.paint_type == PAINT_BRUSH_TYPE) + { + gfig_paint (selvals.brshtype, + gfig_context->drawable_id, + seg_count * 2, line_pnts); + } + + g_free (line_pnts); +} + +void +d_line_object_class_init (void) +{ + GfigObjectClass *class = &dobj_class[LINE]; + + class->type = LINE; + class->name = "LINE"; + class->drawfunc = d_draw_line; + class->paintfunc = d_paint_line; + class->copyfunc = d_copy_line; + class->update = d_update_line; +} + +static void +d_update_line (GdkPoint *pnt) +{ + DobjPoints *spnt, *epnt; + + /* Get start of segments */ + spnt = obj_creating->points; + + if (!spnt) + return; /* No points */ + + if ((epnt = spnt->next)) + { + g_free (epnt); + } + + epnt = new_dobjpoint (pnt->x, pnt->y); + spnt->next = epnt; +} + +void +d_line_start (GdkPoint *pnt, + gboolean shift_down) +{ + if (!obj_creating || !shift_down) + { + /* Must delete obj_creating if we have one */ + obj_creating = d_new_object (LINE, pnt->x, pnt->y); + } + else + { + /* Contniuation */ + d_update_line (pnt); + } +} + +void +d_line_end (GdkPoint *pnt, + gboolean shift_down) +{ + if (shift_down) + { + if (tmp_line) + { + GdkPoint tmp_pnt = *pnt; + + if (need_to_scale) + { + tmp_pnt.x = pnt->x * scale_x_factor; + tmp_pnt.y = pnt->y * scale_y_factor; + } + + d_pnt_add_line (tmp_line, tmp_pnt.x, tmp_pnt.y, -1); + free_one_obj (obj_creating); + /* Must free obj_creating */ + } + else + { + tmp_line = obj_creating; + add_to_all_obj (gfig_context->current_obj, obj_creating); + } + + obj_creating = d_new_object (LINE, pnt->x, pnt->y); + } + else + { + if (tmp_line) + { + GdkPoint tmp_pnt = *pnt; + + if (need_to_scale) + { + tmp_pnt.x = pnt->x * scale_x_factor; + tmp_pnt.y = pnt->y * scale_y_factor; + } + + d_pnt_add_line (tmp_line, tmp_pnt.x, tmp_pnt.y, -1); + free_one_obj (obj_creating); + /* Must free obj_creating */ + } + else + { + add_to_all_obj (gfig_context->current_obj, obj_creating); + } + obj_creating = NULL; + tmp_line = NULL; + } +} |