Add comment for borrowed code.
This commit is contained in:
Daiki Ueno
@ -1,4 +1,5 @@
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/*
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/*
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* Copyright (C) 2006 Sergey V. Udaltsov <svu@gnome.org>
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* Copyright (C) 2010 Daiki Ueno <ueno@unixuser.org>
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* Copyright (C) 2010 Daiki Ueno <ueno@unixuser.org>
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* Copyright (C) 2010 Red Hat, Inc.
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* Copyright (C) 2010 Red Hat, Inc.
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*
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*
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@ -23,6 +24,8 @@
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* @short_description: Custom #ClutterActor drawing a key shape
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* @short_description: Custom #ClutterActor drawing a key shape
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*/
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*/
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#include <cogl/cogl.h>
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#include <cogl/cogl-pango.h>
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#include <math.h>
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#include <math.h>
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#ifdef HAVE_CONFIG_H
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#ifdef HAVE_CONFIG_H
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@ -30,8 +33,6 @@
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#endif /* HAVE_CONFIG_H */
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#endif /* HAVE_CONFIG_H */
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#include "eek-clutter-key-actor.h"
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#include "eek-clutter-key-actor.h"
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#include "eek-keysym.h"
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#include "eek-keysym.h"
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#include <cogl/cogl.h>
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#include <cogl/cogl-pango.h>
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#define noKBDRAW_DEBUG
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#define noKBDRAW_DEBUG
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@ -66,6 +67,11 @@ static void draw_key_on_layout (EekKey *key,
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PangoLayout *layout);
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PangoLayout *layout);
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static void key_enlarge (ClutterActor *actor);
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static void key_enlarge (ClutterActor *actor);
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static void key_shrink (ClutterActor *actor);
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static void key_shrink (ClutterActor *actor);
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static void draw_rounded_polygon (cairo_t *cr,
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gboolean filled,
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gdouble radius,
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EekPoint *points,
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gint num_points);
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static void
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static void
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eek_clutter_key_actor_real_paint (ClutterActor *self)
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eek_clutter_key_actor_real_paint (ClutterActor *self)
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@ -101,7 +107,8 @@ eek_clutter_key_actor_real_paint (ClutterActor *self)
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/* FIXME: Color should be configurable through a property. */
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/* FIXME: Color should be configurable through a property. */
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cogl_color_set_from_4ub (&color, 0x80, 0x00, 0x00, 0xff);
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cogl_color_set_from_4ub (&color, 0x80, 0x00, 0x00, 0xff);
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clutter_actor_get_allocation_geometry (self, &geom);
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clutter_actor_get_allocation_geometry (self, &geom);
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cogl_pango_render_layout (layout,
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cogl_pango_render_layout
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(layout,
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(geom.width - logical_rect.width / PANGO_SCALE) / 2,
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(geom.width - logical_rect.width / PANGO_SCALE) / 2,
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(geom.height - logical_rect.height / PANGO_SCALE) / 2,
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(geom.height - logical_rect.height / PANGO_SCALE) / 2,
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&color,
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&color,
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@ -302,6 +309,134 @@ key_shrink (ClutterActor *actor)
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NULL);
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NULL);
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}
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}
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static ClutterActor *
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create_texture_for_key (EekKey *key)
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{
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ClutterActor *texture;
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cairo_t *cr;
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cairo_pattern_t *pat;
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EekOutline *outline;
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EekBounds bounds;
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outline = eek_key_get_outline (EEK_KEY(key));
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eek_element_get_bounds (EEK_ELEMENT(key), &bounds);
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texture = clutter_cairo_texture_new (bounds.width, bounds.height);
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cr = clutter_cairo_texture_create (CLUTTER_CAIRO_TEXTURE(texture));
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cairo_set_line_width (cr, 1);
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cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND);
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pat = cairo_pattern_create_linear (0.0, 0.0, 0.0, 256.0);
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cairo_pattern_add_color_stop_rgba (pat, 1, 0.5, 0.5, 0.5, 1);
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cairo_pattern_add_color_stop_rgba (pat, 0, 1, 1, 1, 1);
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cairo_set_source (cr, pat);
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draw_rounded_polygon (cr,
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TRUE,
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outline->corner_radius,
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outline->points,
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outline->num_points);
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cairo_pattern_destroy (pat);
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cairo_set_source_rgba (cr, 0.3, 0.3, 0.3, 0.5);
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draw_rounded_polygon (cr,
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FALSE,
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outline->corner_radius,
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outline->points,
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outline->num_points);
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cairo_destroy (cr);
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return texture;
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}
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static ClutterActor *
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get_texture (EekClutterKeyActor *actor)
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{
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ClutterActor *texture;
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EekOutline *outline;
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if (!texture_cache.outline_textures)
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texture_cache.outline_textures = g_hash_table_new_full (g_direct_hash,
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g_direct_equal,
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NULL,
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g_free);
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outline = eek_key_get_outline (actor->priv->key);
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texture = g_hash_table_lookup (texture_cache.outline_textures, outline);
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if (texture == NULL) {
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texture = create_texture_for_key (actor->priv->key);
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g_hash_table_insert (texture_cache.outline_textures, outline, texture);
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} else
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texture = clutter_clone_new (texture);
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texture_cache.outline_textures_ref_count++;
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return texture;
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}
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static void
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draw_text_on_layout (PangoLayout *layout,
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const gchar *text,
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gdouble scale)
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{
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PangoFontDescription *font_desc;
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#define FONT_SIZE (720 * 50)
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/* FIXME: Font should be configurable through a property. */
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font_desc = pango_font_description_from_string ("Sans");
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pango_font_description_set_size (font_desc, FONT_SIZE * scale);
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pango_layout_set_font_description (layout, font_desc);
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pango_layout_set_alignment (layout, PANGO_ALIGN_CENTER);
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pango_layout_set_text (layout, text, -1);
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pango_font_description_free (font_desc);
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}
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static void
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draw_key_on_layout (EekKey *key,
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PangoLayout *layout)
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{
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PangoLayout *buffer;
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PangoRectangle logical_rect = { 0, };
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EekBounds bounds;
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guint keysym;
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const gchar *label, *empty_label = "";
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gdouble scale_x, scale_y;
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eek_element_get_bounds (EEK_ELEMENT(key), &bounds);
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keysym = eek_key_get_keysym (key);
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if (keysym == EEK_INVALID_KEYSYM)
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return;
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label = eek_keysym_to_string (keysym);
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if (!label)
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label = empty_label;
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/* Compute the layout extents. */
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buffer = pango_layout_copy (layout);
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draw_text_on_layout (buffer, label, 1.0);
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pango_layout_get_extents (buffer, NULL, &logical_rect);
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scale_x = scale_y = 1.0;
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if (PANGO_PIXELS(logical_rect.width) > bounds.width)
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scale_x = bounds.width / PANGO_PIXELS(logical_rect.width);
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if (PANGO_PIXELS(logical_rect.height) > bounds.height)
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scale_y = bounds.height / PANGO_PIXELS(logical_rect.height);
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g_object_unref (buffer);
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/* Actually draw on the layout */
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draw_text_on_layout (layout,
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label,
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(scale_x < scale_y ? scale_x : scale_y) * 0.8);
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if (label != empty_label)
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g_free ((gpointer)label);
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}
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/*
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* The functions below are borrowed from
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* libgnomekbd/gkbd-keyboard-drawing.c.
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* Copyright (C) 2006 Sergey V. Udaltsov <svu@gnome.org>
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*
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* length(), point_line_distance(), normal_form(), inverse(), multiply(),
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* intersect(), rounded_corner(), draw_rounded_polygon()
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*/
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static gdouble
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static gdouble
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length (gdouble x, gdouble y)
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length (gdouble x, gdouble y)
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{
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{
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@ -469,7 +604,7 @@ rounded_corner (cairo_t * cr,
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cairo_line_to (cr, cx, cy);
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cairo_line_to (cr, cx, cy);
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}
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}
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void
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static void
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draw_rounded_polygon (cairo_t *cr,
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draw_rounded_polygon (cairo_t *cr,
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gboolean filled,
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gboolean filled,
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gdouble radius,
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gdouble radius,
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@ -508,121 +643,3 @@ draw_rounded_polygon (cairo_t *cr,
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else
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else
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cairo_stroke (cr);
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cairo_stroke (cr);
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}
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}
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static ClutterActor *
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create_texture_for_key (EekKey *key)
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{
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ClutterActor *texture;
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cairo_t *cr;
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cairo_pattern_t *pat;
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EekOutline *outline;
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EekBounds bounds;
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outline = eek_key_get_outline (EEK_KEY(key));
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eek_element_get_bounds (EEK_ELEMENT(key), &bounds);
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texture = clutter_cairo_texture_new (bounds.width, bounds.height);
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cr = clutter_cairo_texture_create (CLUTTER_CAIRO_TEXTURE(texture));
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cairo_set_line_width (cr, 1);
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cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND);
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pat = cairo_pattern_create_linear (0.0, 0.0, 0.0, 256.0);
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cairo_pattern_add_color_stop_rgba (pat, 1, 0.5, 0.5, 0.5, 1);
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cairo_pattern_add_color_stop_rgba (pat, 0, 1, 1, 1, 1);
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cairo_set_source (cr, pat);
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draw_rounded_polygon (cr,
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TRUE,
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outline->corner_radius,
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outline->points,
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outline->num_points);
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cairo_pattern_destroy (pat);
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cairo_set_source_rgba (cr, 0.3, 0.3, 0.3, 0.5);
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draw_rounded_polygon (cr,
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FALSE,
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outline->corner_radius,
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outline->points,
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outline->num_points);
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cairo_destroy (cr);
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return texture;
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}
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static ClutterActor *
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get_texture (EekClutterKeyActor *actor)
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{
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ClutterActor *texture;
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EekOutline *outline;
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if (!texture_cache.outline_textures)
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texture_cache.outline_textures = g_hash_table_new_full (g_direct_hash,
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g_direct_equal,
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NULL,
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g_free);
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outline = eek_key_get_outline (actor->priv->key);
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texture = g_hash_table_lookup (texture_cache.outline_textures, outline);
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if (texture == NULL) {
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texture = create_texture_for_key (actor->priv->key);
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g_hash_table_insert (texture_cache.outline_textures, outline, texture);
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} else
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texture = clutter_clone_new (texture);
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texture_cache.outline_textures_ref_count++;
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return texture;
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}
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static void
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draw_text_on_layout (PangoLayout *layout,
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const gchar *text,
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gdouble scale)
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{
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PangoFontDescription *font_desc;
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#define FONT_SIZE (720 * 50)
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/* FIXME: Font should be configurable through a property. */
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font_desc = pango_font_description_from_string ("Sans");
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pango_font_description_set_size (font_desc, FONT_SIZE * scale);
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pango_layout_set_font_description (layout, font_desc);
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pango_layout_set_alignment (layout, PANGO_ALIGN_CENTER);
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pango_layout_set_text (layout, text, -1);
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pango_font_description_free (font_desc);
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}
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static void
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draw_key_on_layout (EekKey *key,
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PangoLayout *layout)
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{
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PangoLayout *buffer;
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PangoRectangle logical_rect = { 0, };
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EekBounds bounds;
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guint keysym;
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const gchar *label, *empty_label = "";
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gdouble scale_x, scale_y;
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eek_element_get_bounds (EEK_ELEMENT(key), &bounds);
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keysym = eek_key_get_keysym (key);
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if (keysym == EEK_INVALID_KEYSYM)
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return;
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label = eek_keysym_to_string (keysym);
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if (!label)
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label = empty_label;
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/* Compute the layout extents. */
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buffer = pango_layout_copy (layout);
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draw_text_on_layout (buffer, label, 1.0);
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pango_layout_get_extents (buffer, NULL, &logical_rect);
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scale_x = scale_y = 1.0;
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if (PANGO_PIXELS(logical_rect.width) > bounds.width)
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scale_x = bounds.width / PANGO_PIXELS(logical_rect.width);
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if (PANGO_PIXELS(logical_rect.height) > bounds.height)
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scale_y = bounds.height / PANGO_PIXELS(logical_rect.height);
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g_object_unref (buffer);
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/* Actually draw on the layout */
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draw_text_on_layout (layout,
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label,
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(scale_x < scale_y ? scale_x : scale_y) * 0.8);
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if (label != empty_label)
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g_free ((gpointer)label);
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}
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Reference in New Issue
Block a user