forked from AuroraMiddleware/gtk
567 lines
13 KiB
C
567 lines
13 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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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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/*
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* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
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* file for a list of people on the GTK+ Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
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*/
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#include "config.h"
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#include <math.h>
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#include <string.h>
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#include <sys/types.h>
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#ifdef HAVE_SYS_PARAM_H
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#include <sys/param.h>
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#endif
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#undef GDK_DISABLE_DEPRECATED
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#undef GTK_DISABLE_DEPRECATED
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#include "gtkpreview.h"
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#include "gtkprivate.h"
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#include "gtkintl.h"
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#include "gtkalias.h"
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#define PREVIEW_CLASS(w) GTK_PREVIEW_CLASS (GTK_OBJECT (w)->klass)
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enum {
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PROP_0,
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PROP_EXPAND
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};
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static void gtk_preview_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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static void gtk_preview_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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static void gtk_preview_finalize (GObject *object);
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static void gtk_preview_realize (GtkWidget *widget);
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static void gtk_preview_size_allocate (GtkWidget *widget,
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GtkAllocation *allocation);
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static gint gtk_preview_expose (GtkWidget *widget,
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GdkEventExpose *event);
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static void gtk_preview_make_buffer (GtkPreview *preview);
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static void gtk_fill_lookup_array (guchar *array);
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static GtkPreviewClass *preview_class = NULL;
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static gint install_cmap = FALSE;
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G_DEFINE_TYPE (GtkPreview, gtk_preview, GTK_TYPE_WIDGET)
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static void
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gtk_preview_class_init (GtkPreviewClass *klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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GtkWidgetClass *widget_class;
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widget_class = (GtkWidgetClass*) klass;
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preview_class = klass;
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gobject_class->finalize = gtk_preview_finalize;
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gobject_class->set_property = gtk_preview_set_property;
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gobject_class->get_property = gtk_preview_get_property;
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widget_class->realize = gtk_preview_realize;
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widget_class->size_allocate = gtk_preview_size_allocate;
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widget_class->expose_event = gtk_preview_expose;
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klass->info.lookup = NULL;
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klass->info.gamma = 1.0;
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g_object_class_install_property (gobject_class,
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PROP_EXPAND,
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g_param_spec_boolean ("expand",
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P_("Expand"),
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P_("Whether the preview widget should take up the entire space it is allocated"),
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FALSE,
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GTK_PARAM_READWRITE));
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}
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static void
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gtk_preview_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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GtkPreview *preview = GTK_PREVIEW (object);
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switch (prop_id)
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{
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case PROP_EXPAND:
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gtk_preview_set_expand (preview, g_value_get_boolean (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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gtk_preview_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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GtkPreview *preview;
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preview = GTK_PREVIEW (object);
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switch (prop_id)
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{
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case PROP_EXPAND:
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g_value_set_boolean (value, preview->expand);
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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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void
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gtk_preview_reset (void)
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{
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/* unimplemented */
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}
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static void
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gtk_preview_init (GtkPreview *preview)
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{
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preview->buffer = NULL;
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preview->buffer_width = 0;
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preview->buffer_height = 0;
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preview->expand = FALSE;
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}
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void
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gtk_preview_uninit (void)
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{
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/* unimplemented */
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}
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GtkWidget*
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gtk_preview_new (GtkPreviewType type)
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{
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GtkPreview *preview;
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preview = gtk_type_new (gtk_preview_get_type ());
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preview->type = type;
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if (type == GTK_PREVIEW_COLOR)
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preview->bpp = 3;
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else
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preview->bpp = 1;
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preview->dither = GDK_RGB_DITHER_NORMAL;
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return GTK_WIDGET (preview);
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}
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void
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gtk_preview_size (GtkPreview *preview,
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gint width,
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gint height)
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{
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g_return_if_fail (GTK_IS_PREVIEW (preview));
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if ((width != GTK_WIDGET (preview)->requisition.width) ||
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(height != GTK_WIDGET (preview)->requisition.height))
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{
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GTK_WIDGET (preview)->requisition.width = width;
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GTK_WIDGET (preview)->requisition.height = height;
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g_free (preview->buffer);
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preview->buffer = NULL;
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}
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}
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void
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gtk_preview_put (GtkPreview *preview,
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GdkWindow *window,
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GdkGC *gc,
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gint srcx,
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gint srcy,
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gint destx,
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gint desty,
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gint width,
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gint height)
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{
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GdkRectangle r1, r2, r3;
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guchar *src;
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guint bpp;
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guint rowstride;
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g_return_if_fail (GTK_IS_PREVIEW (preview));
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g_return_if_fail (window != NULL);
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if (!preview->buffer)
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return;
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r1.x = 0;
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r1.y = 0;
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r1.width = preview->buffer_width;
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r1.height = preview->buffer_height;
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r2.x = srcx;
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r2.y = srcy;
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r2.width = width;
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r2.height = height;
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if (!gdk_rectangle_intersect (&r1, &r2, &r3))
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return;
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bpp = preview->bpp;
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rowstride = preview->rowstride;
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src = preview->buffer + r3.y * rowstride + r3.x * bpp;
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if (preview->type == GTK_PREVIEW_COLOR)
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gdk_draw_rgb_image (window,
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gc,
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destx + (r3.x - srcx),
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desty + (r3.y - srcy),
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r3.width,
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r3.height,
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preview->dither,
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src,
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rowstride);
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else
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gdk_draw_gray_image (window,
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gc,
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destx + (r3.x - srcx),
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desty + (r3.y - srcy),
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r3.width,
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r3.height,
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preview->dither,
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src,
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rowstride);
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}
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void
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gtk_preview_draw_row (GtkPreview *preview,
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guchar *data,
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gint x,
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gint y,
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gint w)
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{
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guint bpp;
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guint rowstride;
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g_return_if_fail (GTK_IS_PREVIEW (preview));
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g_return_if_fail (data != NULL);
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bpp = (preview->type == GTK_PREVIEW_COLOR ? 3 : 1);
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rowstride = (preview->buffer_width * bpp + 3) & -4;
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if ((w <= 0) || (y < 0))
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return;
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g_return_if_fail (data != NULL);
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gtk_preview_make_buffer (preview);
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if (x + w > preview->buffer_width)
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return;
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if (y + 1 > preview->buffer_height)
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return;
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if (preview_class->info.gamma == 1.0)
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memcpy (preview->buffer + y * rowstride + x * bpp, data, w * bpp);
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else
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{
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guint i, size;
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guchar *src, *dst;
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guchar *lookup;
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if (preview_class->info.lookup != NULL)
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lookup = preview_class->info.lookup;
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else
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{
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preview_class->info.lookup = g_new (guchar, 256);
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gtk_fill_lookup_array (preview_class->info.lookup);
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lookup = preview_class->info.lookup;
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}
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size = w * bpp;
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src = data;
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dst = preview->buffer + y * rowstride + x * bpp;
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for (i = 0; i < size; i++)
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*dst++ = lookup[*src++];
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}
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}
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void
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gtk_preview_set_expand (GtkPreview *preview,
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gboolean expand)
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{
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g_return_if_fail (GTK_IS_PREVIEW (preview));
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expand = expand != FALSE;
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if (preview->expand != expand)
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{
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preview->expand = expand;
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gtk_widget_queue_resize (GTK_WIDGET (preview));
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g_object_notify (G_OBJECT (preview), "expand");
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}
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}
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void
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gtk_preview_set_gamma (double _gamma)
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{
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if (!preview_class)
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preview_class = gtk_type_class (gtk_preview_get_type ());
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if (preview_class->info.gamma != _gamma)
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{
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preview_class->info.gamma = _gamma;
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if (preview_class->info.lookup != NULL)
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{
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g_free (preview_class->info.lookup);
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preview_class->info.lookup = NULL;
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}
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}
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}
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void
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gtk_preview_set_color_cube (guint nred_shades,
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guint ngreen_shades,
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guint nblue_shades,
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guint ngray_shades)
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{
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/* unimplemented */
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}
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void
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gtk_preview_set_install_cmap (gint _install_cmap)
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{
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/* effectively unimplemented */
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install_cmap = _install_cmap;
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}
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void
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gtk_preview_set_reserved (gint nreserved)
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{
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/* unimplemented */
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}
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void
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gtk_preview_set_dither (GtkPreview *preview,
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GdkRgbDither dither)
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{
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preview->dither = dither;
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}
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GdkVisual*
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gtk_preview_get_visual (void)
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{
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return gdk_screen_get_rgb_visual (gdk_screen_get_default ());
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}
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GdkColormap*
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gtk_preview_get_cmap (void)
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{
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return gdk_screen_get_rgb_colormap (gdk_screen_get_default ());
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}
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GtkPreviewInfo*
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gtk_preview_get_info (void)
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{
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if (!preview_class)
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preview_class = gtk_type_class (gtk_preview_get_type ());
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return &preview_class->info;
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}
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static void
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gtk_preview_finalize (GObject *object)
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{
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GtkPreview *preview = GTK_PREVIEW (object);
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g_free (preview->buffer);
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G_OBJECT_CLASS (gtk_preview_parent_class)->finalize (object);
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}
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static void
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gtk_preview_realize (GtkWidget *widget)
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{
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GtkPreview *preview = GTK_PREVIEW (widget);
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GdkWindowAttr attributes;
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gint attributes_mask;
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gtk_widget_set_realized (widget, TRUE);
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attributes.window_type = GDK_WINDOW_CHILD;
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if (preview->expand)
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{
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attributes.width = widget->allocation.width;
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attributes.height = widget->allocation.height;
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}
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else
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{
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attributes.width = MIN (widget->requisition.width, widget->allocation.width);
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attributes.height = MIN (widget->requisition.height, widget->allocation.height);
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}
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attributes.x = widget->allocation.x + (widget->allocation.width - attributes.width) / 2;
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attributes.y = widget->allocation.y + (widget->allocation.height - attributes.height) / 2;;
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attributes.wclass = GDK_INPUT_OUTPUT;
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attributes.event_mask = gtk_widget_get_events (widget) | GDK_EXPOSURE_MASK;
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attributes_mask = GDK_WA_X | GDK_WA_Y;
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widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask);
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gdk_window_set_user_data (widget->window, widget);
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widget->style = gtk_style_attach (widget->style, widget->window);
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gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
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}
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static void
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gtk_preview_size_allocate (GtkWidget *widget,
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GtkAllocation *allocation)
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{
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GtkPreview *preview = GTK_PREVIEW (widget);
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gint width, height;
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widget->allocation = *allocation;
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if (gtk_widget_get_realized (widget))
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{
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if (preview->expand)
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{
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width = widget->allocation.width;
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height = widget->allocation.height;
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}
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else
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{
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width = MIN (widget->allocation.width, widget->requisition.width);
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height = MIN (widget->allocation.height, widget->requisition.height);
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}
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gdk_window_move_resize (widget->window,
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widget->allocation.x + (widget->allocation.width - width) / 2,
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widget->allocation.y + (widget->allocation.height - height) / 2,
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width, height);
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}
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}
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static gint
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gtk_preview_expose (GtkWidget *widget,
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GdkEventExpose *event)
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{
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GtkPreview *preview;
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gint width, height;
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if (GTK_WIDGET_DRAWABLE (widget))
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{
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preview = GTK_PREVIEW (widget);
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gdk_drawable_get_size (widget->window, &width, &height);
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gtk_preview_put (GTK_PREVIEW (widget),
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widget->window, widget->style->black_gc,
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event->area.x - (width - preview->buffer_width)/2,
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event->area.y - (height - preview->buffer_height)/2,
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event->area.x, event->area.y,
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event->area.width, event->area.height);
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}
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return FALSE;
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}
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static void
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gtk_preview_make_buffer (GtkPreview *preview)
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{
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GtkWidget *widget;
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gint width;
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gint height;
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g_return_if_fail (GTK_IS_PREVIEW (preview));
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widget = GTK_WIDGET (preview);
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if (preview->expand &&
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(widget->allocation.width != 0) &&
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(widget->allocation.height != 0))
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{
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width = widget->allocation.width;
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height = widget->allocation.height;
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}
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else
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{
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width = widget->requisition.width;
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height = widget->requisition.height;
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}
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if (!preview->buffer ||
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(preview->buffer_width != width) ||
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(preview->buffer_height != height))
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{
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g_free (preview->buffer);
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preview->buffer_width = width;
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preview->buffer_height = height;
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preview->rowstride = (preview->buffer_width * preview->bpp + 3) & -4;
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preview->buffer = g_new0 (guchar,
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preview->buffer_height *
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preview->rowstride);
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}
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}
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/* This is used for implementing gamma. */
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static void
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gtk_fill_lookup_array (guchar *array)
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{
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double one_over_gamma;
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double ind;
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int val;
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int i;
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one_over_gamma = 1.0 / preview_class->info.gamma;
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for (i = 0; i < 256; i++)
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{
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ind = (double) i / 255.0;
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val = (int) (255 * pow (ind, one_over_gamma));
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array[i] = val;
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}
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}
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#define __GTK_PREVIEW_C__
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#include "gtkaliasdef.c"
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