Merge gobject-branch into trunk
This commit is contained in:
Matthew Allum
419
clutter/clutter-label.c
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419
clutter/clutter-label.c
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/*
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* Clutter.
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*
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* An OpenGL based 'interactive canvas' library.
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*
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* Authored By Matthew Allum <mallum@openedhand.com>
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*
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* Copyright (C) 2006 OpenedHand
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include "clutter-label.h"
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#include "clutter-main.h"
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#include "clutter-enum-types.h"
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#include "clutter-private.h" /* for DBG */
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#include <pango/pangoft2.h>
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G_DEFINE_TYPE (ClutterLabel, clutter_label, CLUTTER_TYPE_TEXTURE);
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enum
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{
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PROP_0,
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PROP_FONT,
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PROP_TEXT,
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PROP_COL
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};
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#define CLUTTER_LABEL_GET_PRIVATE(obj) \
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(G_TYPE_INSTANCE_GET_PRIVATE ((obj), CLUTTER_TYPE_LABEL, ClutterLabelPrivate))
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struct _ClutterLabelPrivate
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{
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PangoLayout *layout;
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PangoContext *context;
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PangoFontDescription *desc;
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guint32 fgcol;
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gchar *text;
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gchar *font;
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gint extents_width, extents_height;
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};
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static void
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clutter_label_make_pixbuf (ClutterLabel *label)
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{
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gint bx, by, w, h;
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FT_Bitmap ft_bitmap;
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guint8 const *ps;
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guint8 *pd;
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ClutterLabelPrivate *priv;
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ClutterTexture *texture;
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GdkPixbuf *pixbuf;
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priv = label->priv;
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texture = CLUTTER_TEXTURE(label);
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if (priv->layout == NULL || priv->desc == NULL || priv->text == NULL)
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{
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CLUTTER_DBG("*** FAIL: layout: %p , desc: %p, text %p ***",
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priv->layout, priv->desc, priv->text);
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return;
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}
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pango_layout_set_font_description (priv->layout, priv->desc);
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pango_layout_set_text (priv->layout, priv->text, -1);
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if (priv->extents_width != 0)
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{
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CLUTTER_DBG("forcing width to '%i'", priv->extents_width);
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pango_layout_set_width (priv->layout, PANGO_SCALE * priv->extents_width);
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pango_layout_set_wrap (priv->layout, PANGO_WRAP_WORD);
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}
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pango_layout_get_pixel_size (priv->layout,
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&w,
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&h);
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if (w == 0 || h == 0)
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return;
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ft_bitmap.rows = h;
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ft_bitmap.width = w;
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ft_bitmap.pitch = (w+3) & ~3;
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ft_bitmap.buffer = g_malloc0 (ft_bitmap.rows * ft_bitmap.pitch);
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ft_bitmap.num_grays = 256;
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ft_bitmap.pixel_mode = ft_pixel_mode_grays;
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ft_bitmap.palette_mode = 0;
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ft_bitmap.palette = NULL;
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pango_ft2_render_layout (&ft_bitmap, priv->layout, 0, 0);
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pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB,
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TRUE,
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8,
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ft_bitmap.width,
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ft_bitmap.rows);
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for (by = 0; by < ft_bitmap.rows; by++)
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{
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pd = gdk_pixbuf_get_pixels (pixbuf)
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+ by * gdk_pixbuf_get_rowstride (pixbuf);
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ps = ft_bitmap.buffer + by * ft_bitmap.pitch;
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for (bx = 0; bx < ft_bitmap.width; bx++)
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{
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*pd++ = clutter_color_r(priv->fgcol);
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*pd++ = clutter_color_g(priv->fgcol);
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*pd++ = clutter_color_b(priv->fgcol);
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*pd++ = *ps++;
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}
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}
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g_free (ft_bitmap.buffer);
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CLUTTER_DBG("Calling set_pixbuf with text : '%s' , pixb %ix%i",
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priv->text, w, h);
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clutter_texture_set_pixbuf (CLUTTER_TEXTURE (label), pixbuf);
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/* Texture has the ref now */
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g_object_unref (pixbuf);
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}
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static void
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clutter_label_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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ClutterLabel *label;
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ClutterLabelPrivate *priv;
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label = CLUTTER_LABEL(object);
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priv = label->priv;
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switch (prop_id)
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{
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case PROP_FONT:
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clutter_label_set_font (label, g_value_get_string(value));
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break;
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case PROP_TEXT:
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clutter_label_set_text (label, g_value_get_string(value));
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break;
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case PROP_COL:
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clutter_label_set_color (label, g_value_get_uint(value));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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clutter_label_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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ClutterLabel *label;
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ClutterLabelPrivate *priv;
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label = CLUTTER_LABEL(object);
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priv = label->priv;
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switch (prop_id)
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{
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case PROP_FONT:
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g_value_set_string (value, priv->font);
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break;
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case PROP_TEXT:
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g_value_set_string (value, priv->text);
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break;
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case PROP_COL:
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g_value_set_uint (value, priv->fgcol);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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clutter_label_dispose (GObject *object)
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{
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ClutterLabel *self = CLUTTER_LABEL(object);
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ClutterLabelPrivate *priv;
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priv = self->priv;
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if (priv)
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{
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if (priv->layout)
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{
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g_object_unref (priv->layout);
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priv->layout = NULL;
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}
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if (priv->desc)
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{
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pango_font_description_free (priv->desc);
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priv->desc = NULL;
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}
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if (priv->text)
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{
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g_free (priv->text);
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priv->text = NULL;
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}
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if (priv->font)
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{
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g_free (priv->font);
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priv->font = NULL;
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}
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if (priv->context)
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{
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g_object_unref (priv->context);
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priv->context = NULL;
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}
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}
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G_OBJECT_CLASS (clutter_label_parent_class)->dispose (object);
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}
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static void
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clutter_label_finalize (GObject *object)
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{
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G_OBJECT_CLASS (clutter_label_parent_class)->finalize (object);
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}
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static void
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clutter_label_class_init (ClutterLabelClass *klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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ClutterElementClass *element_class = CLUTTER_ELEMENT_CLASS (klass);
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ClutterTextureClass *texture_class = CLUTTER_TEXTURE_CLASS (klass);
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ClutterElementClass *parent_class = CLUTTER_ELEMENT_CLASS (clutter_label_parent_class);
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element_class->paint = parent_class->paint;
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element_class->realize = parent_class->realize;
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element_class->unrealize = parent_class->unrealize;
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element_class->show = parent_class->show;
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element_class->hide = parent_class->hide;
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gobject_class->finalize = clutter_label_finalize;
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gobject_class->dispose = clutter_label_dispose;
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gobject_class->set_property = clutter_label_set_property;
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gobject_class->get_property = clutter_label_get_property;
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g_object_class_install_property
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(gobject_class, PROP_FONT,
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g_param_spec_string ("font",
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"Font",
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"Pango font description",
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"sans 10",
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G_PARAM_CONSTRUCT | G_PARAM_READWRITE));
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g_object_class_install_property
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(gobject_class, PROP_TEXT,
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g_param_spec_string ("text",
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"Text",
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"Text to render",
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"",
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G_PARAM_CONSTRUCT | G_PARAM_READWRITE));
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g_object_class_install_property
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(gobject_class, PROP_COL,
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g_param_spec_uint ("color",
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"Font Colour",
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"Font Colour specified as 8 byte RGBA value",
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0,
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0xffffffff,
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0x000000ff,
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G_PARAM_CONSTRUCT | G_PARAM_READWRITE));
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g_type_class_add_private (gobject_class, sizeof (ClutterLabelPrivate));
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}
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static void
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clutter_label_init (ClutterLabel *self)
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{
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ClutterLabelPrivate *priv;
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PangoFT2FontMap *font_map;
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self->priv = priv = CLUTTER_LABEL_GET_PRIVATE (self);
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font_map = PANGO_FT2_FONT_MAP (pango_ft2_font_map_new ());
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pango_ft2_font_map_set_resolution (font_map, 96.0, 96.0);
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priv->context = pango_ft2_font_map_create_context (font_map);
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priv->layout = pango_layout_new (priv->context);
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/* See http://bugzilla.gnome.org/show_bug.cgi?id=143542 ??
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pango_ft2_font_map_substitute_changed (font_map);
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g_object_unref (font_map);
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*/
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}
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ClutterElement*
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clutter_label_new_with_text (const gchar *font_desc, const gchar *text)
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{
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ClutterLabel *label;
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label = g_object_new (CLUTTER_TYPE_LABEL,
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"font", font_desc,
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"text", text,
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NULL);
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return CLUTTER_ELEMENT(label);
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}
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ClutterElement*
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clutter_label_new (void)
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{
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return CLUTTER_ELEMENT(g_object_new (CLUTTER_TYPE_LABEL, NULL));
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}
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void
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clutter_label_set_text (ClutterLabel *label, const gchar *text)
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{
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ClutterLabelPrivate *priv;
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g_return_if_fail (CLUTTER_IS_LABEL (label));
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priv = label->priv;
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if (priv->text)
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g_free (priv->text);
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priv->text = g_strdup(text);
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clutter_label_make_pixbuf (label);
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if (CLUTTER_ELEMENT_IS_VISIBLE (CLUTTER_ELEMENT(label)))
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clutter_element_queue_redraw (CLUTTER_ELEMENT(label));
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}
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void
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clutter_label_set_font (ClutterLabel *label, const gchar *desc)
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{
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ClutterLabelPrivate *priv;
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g_return_if_fail (CLUTTER_IS_LABEL (label));
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priv = label->priv;
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if (priv->desc)
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pango_font_description_free (priv->desc);
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if (priv->font)
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g_free(priv->font);
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priv->font = g_strdup(desc);
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priv->desc = pango_font_description_from_string (desc);
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if (label->priv->text && label->priv->text[0] != '\0')
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{
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clutter_label_make_pixbuf (label);
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if (CLUTTER_ELEMENT_IS_VISIBLE (CLUTTER_ELEMENT(label)))
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clutter_element_queue_redraw (CLUTTER_ELEMENT(label));
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}
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}
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void
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clutter_label_set_text_extents (ClutterLabel *label,
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gint width,
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gint height)
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{
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/* FIXME: height extents is broken....
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*/
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label->priv->extents_width = width;
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label->priv->extents_height = height;
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clutter_label_make_pixbuf (label);
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if (CLUTTER_ELEMENT_IS_VISIBLE (CLUTTER_ELEMENT(label)))
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clutter_element_queue_redraw (CLUTTER_ELEMENT(label));
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}
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void
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clutter_label_set_color (ClutterLabel *label, ClutterColor pixel)
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{
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ClutterLabelPrivate *priv;
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priv = label->priv;
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priv->fgcol = pixel;
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clutter_element_set_opacity(CLUTTER_ELEMENT(label), priv->fgcol & 0xff);
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clutter_label_make_pixbuf (label);
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if (CLUTTER_ELEMENT_IS_VISIBLE (CLUTTER_ELEMENT(label)))
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clutter_element_queue_redraw (CLUTTER_ELEMENT(label));
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}
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Block a user