--- /dev/null
+/*
+ * color.c
+ * Copyright (C) 2002-2009 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 "color.h"
+
+#include <string.h>
+
+
+/*****************************************************************************/
+/* Apply given opacity to given color. */
+/*****************************************************************************/
+guint
+gl_color_set_opacity (guint color,
+ gdouble opacity)
+{
+ guint new_color;
+
+ new_color = (color & 0xFFFFFF00) | (((guint)(255.0*opacity)) & 0xFF);
+
+ return new_color;
+}
+
+
+/*****************************************************************************/
+/* Resolve actual shadow color by adjusting opacity. */
+/*****************************************************************************/
+guint
+gl_color_shadow (guint base_color,
+ gdouble opacity,
+ guint object_color)
+{
+ guint color;
+
+ color = gl_color_set_opacity (base_color,
+ opacity * GL_COLOR_F_ALPHA (object_color));
+
+ return color;
+}
+
+
+/*****************************************************************************/
+/* Convert gLabels color into a GdkColor */
+/*****************************************************************************/
+GdkColor *
+gl_color_to_gdk_color (guint color)
+{
+ GdkColor *gdk_color;
+
+ gdk_color = g_new0 (GdkColor, 1);
+
+ gdk_color->red = GL_COLOR_F_RED (color) * 65535;
+ gdk_color->green = GL_COLOR_F_GREEN (color) * 65535;
+ gdk_color->blue = GL_COLOR_F_BLUE (color) * 65535;
+
+ return gdk_color;
+}
+
+
+/*****************************************************************************/
+/* Convert GdkColor into a gLabels color */
+/*****************************************************************************/
+guint
+gl_color_from_gdk_color (GdkColor *gdk_color)
+{
+ guint color;
+
+ color = GL_COLOR ((gdk_color->red >>8),
+ (gdk_color->green >>8),
+ (gdk_color->blue >>8));
+
+ return color;
+}
+
+
+/****************************************************************************/
+/* Create a single color node with default color. */
+/****************************************************************************/
+glColorNode *
+gl_color_node_new_default (void)
+{
+ glColorNode* color_node;
+
+ color_node = g_new0(glColorNode,1);
+
+ color_node->field_flag = FALSE;
+ color_node->color = GL_COLOR_NONE;
+ color_node->key = NULL;
+
+ return color_node;
+}
+
+
+/****************************************************************************/
+/* Copy a single color node. */
+/****************************************************************************/
+glColorNode *
+gl_color_node_dup (glColorNode *src)
+{
+ glColorNode *dst;
+
+ if ( src == NULL ) return NULL;
+
+ dst = g_new0 (glColorNode, 1);
+
+ dst->field_flag = src->field_flag;
+ if (src->key != NULL)
+ {
+ dst->key = g_strdup (src->key);
+ }
+ else
+ {
+ dst->key = NULL;
+ }
+ dst->color = src->color;
+
+ return dst;
+}
+
+
+/****************************************************************************/
+/* Compare 2 color nodes for equality. */
+/****************************************************************************/
+gboolean
+gl_color_node_equal (glColorNode *color_node1,
+ glColorNode *color_node2)
+{
+ /* First take care of the case of either or both being NULL. */
+ if ( color_node1 == NULL )
+ {
+ return ( color_node2 == NULL );
+ }
+ else
+ {
+ if ( color_node2 == NULL )
+ {
+ return FALSE;
+ }
+ }
+
+ /* Bail if field flags differ. */
+ if ( color_node1->field_flag != color_node2->field_flag )
+ {
+ return FALSE;
+ }
+
+ /* Now take care of the case of either or both color fields being different. */
+ if ( color_node1->color != color_node2->color )
+ {
+ return FALSE;
+ }
+
+ /* Then take care of the case of either or both key fields being NULL. */
+ if ( color_node1->key == NULL )
+ {
+ return ( color_node2->key == NULL );
+ }
+ else
+ {
+ if ( color_node2->key == NULL )
+ {
+ return FALSE;
+ }
+ }
+
+ /* Field flags are identical, so now compare the keys. */
+ return (strcmp (color_node1->key, color_node2->key) == 0);
+}
+
+
+/****************************************************************************/
+/* Expand single node into representative color. */
+/****************************************************************************/
+guint
+gl_color_node_expand (glColorNode *color_node,
+ glMergeRecord *record)
+{
+ gchar *text;
+ GdkColor *gdk_color;
+ guint color;
+
+ if (color_node->field_flag)
+ {
+ if (record == NULL)
+ {
+ return GL_COLOR_NONE;
+ }
+ else
+ {
+ text = gl_merge_eval_key (record, color_node->key);
+ if (text != NULL)
+ {
+ gdk_color = g_new0 (GdkColor, 1);
+ if (gdk_color_parse (text, gdk_color))
+ {
+ color = gl_color_from_gdk_color (gdk_color);
+ g_free (gdk_color);
+ return color;
+ }
+ else
+ {
+ g_free (gdk_color);
+ return GL_COLOR_NONE;
+ }
+ }
+ else
+ {
+ return GL_COLOR_NONE;
+ }
+ }
+ }
+ else
+ {
+ return color_node->color;
+ }
+}
+
+
+/****************************************************************************/
+/* Free a single color node. */
+/****************************************************************************/
+void
+gl_color_node_free (glColorNode **color_node)
+{
+ if ( *color_node == NULL ) return;
+
+ g_free ((*color_node)->key);
+ (*color_node)->key = NULL;
+ g_free (*color_node);
+ *color_node = NULL;
+}
+
+
+
+/*
+ * 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