--- /dev/null
+/*
+ * cairo-markup-path.c
+ * Copyright (C) 2001-2009 Jim Evins <evins@snaught.com>.
+ *
+ * This file is part of gLabels.
+ *
+ * gLabels 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.
+ *
+ * gLabels 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 gLabels. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+
+#include "cairo-markup-path.h"
+
+#include <math.h>
+
+#include "debug.h"
+
+
+/*===========================================*/
+/* Private types */
+/*===========================================*/
+
+
+/*===========================================*/
+/* Private globals */
+/*===========================================*/
+
+
+/*===========================================*/
+/* Local function prototypes */
+/*===========================================*/
+
+static void gl_cairo_markup_margin_path (cairo_t *cr,
+ const lglTemplateMarkup *markup,
+ glLabel *label);
+
+static void gl_cairo_markup_margin_rect_path (cairo_t *cr,
+ const lglTemplateMarkup *markup,
+ glLabel *label);
+
+static void gl_cairo_markup_margin_round_path (cairo_t *cr,
+ const lglTemplateMarkup *markup,
+ glLabel *label);
+
+static void gl_cairo_markup_margin_cd_path (cairo_t *cr,
+ const lglTemplateMarkup *markup,
+ glLabel *label);
+
+static void gl_cairo_markup_line_path (cairo_t *cr,
+ const lglTemplateMarkup *markup);
+
+static void gl_cairo_markup_circle_path (cairo_t *cr,
+ const lglTemplateMarkup *markup);
+
+static void gl_cairo_markup_rect_path (cairo_t *cr,
+ const lglTemplateMarkup *markup);
+
+
+/*--------------------------------------------------------------------------*/
+/* Create markup path */
+/*--------------------------------------------------------------------------*/
+void
+gl_cairo_markup_path (cairo_t *cr,
+ const lglTemplateMarkup *markup,
+ glLabel *label)
+{
+ gl_debug (DEBUG_PATH, "START");
+
+ switch (markup->type) {
+ case LGL_TEMPLATE_MARKUP_MARGIN:
+ gl_cairo_markup_margin_path (cr, markup, label);
+ break;
+ case LGL_TEMPLATE_MARKUP_LINE:
+ gl_cairo_markup_line_path (cr, markup);
+ break;
+ case LGL_TEMPLATE_MARKUP_CIRCLE:
+ gl_cairo_markup_circle_path (cr, markup);
+ break;
+ case LGL_TEMPLATE_MARKUP_RECT:
+ gl_cairo_markup_rect_path (cr, markup);
+ break;
+ default:
+ g_message ("Unknown template markup type");
+ break;
+ }
+
+ gl_debug (DEBUG_PATH, "END");
+}
+
+
+/*---------------------------------------------------------------------------*/
+/* PRIVATE. Draw margin markup. */
+/*---------------------------------------------------------------------------*/
+static void
+gl_cairo_markup_margin_path (cairo_t *cr,
+ const lglTemplateMarkup *markup,
+ glLabel *label)
+{
+ const lglTemplateFrame *frame;
+
+ gl_debug (DEBUG_PATH, "START");
+
+ frame = (lglTemplateFrame *)label->template->frames->data;
+
+ switch (frame->shape) {
+
+ case LGL_TEMPLATE_FRAME_SHAPE_RECT:
+ gl_cairo_markup_margin_rect_path (cr, markup, label);
+ break;
+
+ case LGL_TEMPLATE_FRAME_SHAPE_ROUND:
+ gl_cairo_markup_margin_round_path (cr, markup, label);
+ break;
+
+ case LGL_TEMPLATE_FRAME_SHAPE_CD:
+ gl_cairo_markup_margin_cd_path (cr, markup, label);
+ break;
+
+ default:
+ g_message ("Unknown template label style");
+ break;
+ }
+
+ gl_debug (DEBUG_PATH, "END");
+}
+
+
+/*---------------------------------------------------------------------------*/
+/* PRIVATE. Draw simple recangular margin. */
+/*---------------------------------------------------------------------------*/
+static void
+gl_cairo_markup_margin_rect_path (cairo_t *cr,
+ const lglTemplateMarkup *markup,
+ glLabel *label)
+{
+ const lglTemplateFrame *frame;
+ gdouble w, h, r, m;
+
+ gl_debug (DEBUG_PATH, "START");
+
+ frame = (lglTemplateFrame *)label->template->frames->data;
+
+ m = markup->margin.size;
+
+ lgl_template_frame_get_size (frame, &w, &h);
+ w = w - 2*m;
+ h = h - 2*m;
+ r = MAX (frame->rect.r - m, 0.0);
+
+ if ( r == 0.0 )
+ {
+ cairo_rectangle (cr, m, m, w, h);
+ }
+ else
+ {
+ cairo_new_path (cr);
+ cairo_arc_negative (cr, m+r, m+r, r, 3*G_PI/2, G_PI);
+ cairo_arc_negative (cr, m+r, m+h-r, r, G_PI, G_PI/2);
+ cairo_arc_negative (cr, m+w-r, m+h-r, r, G_PI/2, 0.);
+ cairo_arc_negative (cr, m+w-r, m+r, r, 2*G_PI, 3*G_PI/2);
+ cairo_close_path (cr);
+ }
+
+ gl_debug (DEBUG_PATH, "END");
+}
+
+
+/*---------------------------------------------------------------------------*/
+/* PRIVATE. Draw round margin. */
+/*---------------------------------------------------------------------------*/
+static void
+gl_cairo_markup_margin_round_path (cairo_t *cr,
+ const lglTemplateMarkup *markup,
+ glLabel *label)
+{
+ const lglTemplateFrame *frame;
+ gdouble r, m;
+
+ gl_debug (DEBUG_PATH, "START");
+
+ frame = (lglTemplateFrame *)label->template->frames->data;
+
+ r = frame->round.r;
+ m = markup->margin.size;
+
+ cairo_arc (cr, r, r, r-m, 0, 2*G_PI);
+ cairo_close_path (cr);
+
+ gl_debug (DEBUG_PATH, "END");
+}
+
+
+/*---------------------------------------------------------------------------*/
+/* PRIVATE. Draw CD margins. */
+/*---------------------------------------------------------------------------*/
+static void
+gl_cairo_markup_margin_cd_path (cairo_t *cr,
+ const lglTemplateMarkup *markup,
+ glLabel *label)
+{
+ const lglTemplateFrame *frame;
+ gdouble m, r1, r2;
+ gdouble theta1, theta2;
+ gdouble xc, yc;
+ gdouble w, h;
+
+ gl_debug (DEBUG_PATH, "START");
+
+ frame = (lglTemplateFrame *)label->template->frames->data;
+
+ lgl_template_frame_get_size (frame, &w, &h);
+ xc = w/2.0;
+ yc = h/2.0;
+
+ m = markup->margin.size;
+ r1 = frame->cd.r1 - m;
+ r2 = frame->cd.r2 + m;
+
+
+ /*
+ * Outer path (may be clipped)
+ */
+ theta1 = acos ((w-2*m) / (2.0*r1));
+ theta2 = asin ((h-2*m) / (2.0*r1));
+
+ cairo_new_path (cr);
+ cairo_arc (cr, xc, yc, r1, theta1, theta2);
+ cairo_arc (cr, xc, yc, r1, G_PI-theta2, G_PI-theta1);
+ cairo_arc (cr, xc, yc, r1, G_PI+theta1, G_PI+theta2);
+ cairo_arc (cr, xc, yc, r1, 2*G_PI-theta2, 2*G_PI-theta1);
+ cairo_close_path (cr);
+
+
+ /* Inner path (hole) */
+ cairo_new_sub_path (cr);
+ cairo_arc (cr, xc, yc, r2, 0.0, 2*G_PI);
+ cairo_close_path (cr);
+
+ gl_debug (DEBUG_PATH, "END");
+}
+
+
+/*---------------------------------------------------------------------------*/
+/* PRIVATE. Draw line markup. */
+/*---------------------------------------------------------------------------*/
+static void
+gl_cairo_markup_line_path (cairo_t *cr,
+ const lglTemplateMarkup *markup)
+{
+ gl_debug (DEBUG_PATH, "START");
+
+ cairo_move_to (cr, markup->line.x1, markup->line.y1);
+ cairo_line_to (cr, markup->line.x2, markup->line.y2);
+
+ gl_debug (DEBUG_PATH, "END");
+}
+
+
+/*---------------------------------------------------------------------------*/
+/* PRIVATE. Draw circle markup. */
+/*---------------------------------------------------------------------------*/
+static void
+gl_cairo_markup_circle_path (cairo_t *cr,
+ const lglTemplateMarkup *markup)
+{
+ gl_debug (DEBUG_PATH, "START");
+
+ cairo_arc (cr,
+ markup->circle.x0, markup->circle.y0,
+ markup->circle.r,
+ 0.0, 2*G_PI);
+ cairo_close_path (cr);
+
+ gl_debug (DEBUG_PATH, "END");
+}
+
+
+/*---------------------------------------------------------------------------*/
+/* PRIVATE. Draw rect markup. */
+/*---------------------------------------------------------------------------*/
+static void
+gl_cairo_markup_rect_path (cairo_t *cr,
+ const lglTemplateMarkup *markup)
+{
+ gdouble x1 = markup->rect.x1;
+ gdouble y1 = markup->rect.y1;
+ gdouble w = markup->rect.w;
+ gdouble h = markup->rect.h;
+ gdouble r = markup->rect.r;
+
+ gl_debug (DEBUG_PATH, "START");
+
+ if ( r == 0.0 )
+ {
+ cairo_rectangle (cr, x1, y1, w, h);
+ }
+ else
+ {
+ cairo_new_path (cr);
+ cairo_arc_negative (cr, x1+r, y1+r, r, 3*G_PI/2, G_PI);
+ cairo_arc_negative (cr, x1+r, y1+h-r, r, G_PI, G_PI/2);
+ cairo_arc_negative (cr, x1+w-r, y1+h-r, r, G_PI/2, 0.);
+ cairo_arc_negative (cr, x1+w-r, y1+r, r, 2*G_PI, 3*G_PI/2);
+ cairo_close_path (cr);
+ }
+
+ gl_debug (DEBUG_PATH, "END");
+}
+
+
+
+/*
+ * Local Variables: -- emacs
+ * mode: C -- emacs
+ * c-basic-offset: 8 -- emacs
+ * tab-width: 8 -- emacs
+ * indent-tabs-mode: nil -- emacs
+ * End: -- emacs
+ */
projects / glabels / blobdiff