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gimp/app/gimpbrushpreview.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* GimpBrushPreview Widget
* Copyright (C) 1999 Sven Neumann
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "gimpbrushpreview.h"
#include "gimpbrushpipe.h"
#include "gimpbrushpipeP.h"
#include "brush_scale.h"
#include "temp_buf.h"
/* the pixmap for the scale_indicator */
#define scale_indicator_width 7
#define scale_indicator_height 7
#define WHT {255,255,255}
#define BLK { 0, 0, 0}
static unsigned char scale_indicator_bits[7][7][3] =
{
{ WHT, WHT, WHT, WHT, WHT, WHT, WHT },
{ WHT, WHT, WHT, BLK, WHT, WHT, WHT },
{ WHT, WHT, WHT, BLK, WHT, WHT, WHT },
{ WHT, BLK, BLK, BLK, BLK, BLK, WHT },
{ WHT, WHT, WHT, BLK, WHT, WHT, WHT },
{ WHT, WHT, WHT, BLK, WHT, WHT, WHT },
{ WHT, WHT, WHT, WHT, WHT, WHT, WHT }
};
#define BRUSH_PREVIEW_EVENT_MASK (GDK_BUTTON_PRESS_MASK | \
GDK_BUTTON_RELEASE_MASK | \
GDK_ENTER_NOTIFY_MASK | \
GDK_LEAVE_NOTIFY_MASK)
enum {
CLICKED,
LAST_SIGNAL
};
static guint gimp_brush_preview_signals[LAST_SIGNAL] = { 0 };
static GtkPreviewClass *parent_class = NULL;
static gint gimp_brush_preview_button_press_event (GtkWidget *, GdkEventButton *);
static gint gimp_brush_preview_button_release_event (GtkWidget *, GdkEventButton *);
static void gimp_brush_preview_popup_open (GimpBrushPreview *, gint, gint);
static void gimp_brush_preview_popup_close (GimpBrushPreview *);
static void gimp_brush_preview_draw (GimpBrushPreview *);
static void
gimp_brush_preview_destroy (GtkObject *object)
{
GimpBrushPreview *gbp;
g_return_if_fail (GIMP_IS_BRUSH_PREVIEW (object));
gbp = GIMP_BRUSH_PREVIEW (object);
if (gbp->popup)
gtk_widget_destroy (gbp->popup);
if (GTK_OBJECT_CLASS (parent_class)->destroy)
(* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
}
static void
gimp_brush_preview_class_init (GimpBrushPreviewClass *class)
{
GtkObjectClass *object_class;
GtkWidgetClass *widget_class;
object_class = (GtkObjectClass*) class;
widget_class = (GtkWidgetClass*) class;
parent_class = gtk_type_class (gtk_preview_get_type ());
gimp_brush_preview_signals[CLICKED] =
gtk_signal_new ("clicked",
GTK_RUN_FIRST,
object_class->type,
GTK_SIGNAL_OFFSET (GimpBrushPreviewClass, clicked),
gtk_signal_default_marshaller, GTK_TYPE_NONE, 0);
gtk_object_class_add_signals (object_class, gimp_brush_preview_signals,
LAST_SIGNAL);
class->clicked = NULL;
widget_class->button_press_event = gimp_brush_preview_button_press_event;
widget_class->button_release_event = gimp_brush_preview_button_release_event;
object_class->destroy = gimp_brush_preview_destroy;
}
static void
gimp_brush_preview_init (GimpBrushPreview *gbp)
{
gbp->brush = NULL;
gbp->width = 0;
gbp->height = 0;
gbp->tooltips = NULL;
gbp->popup = NULL;
gbp->popup_preview = NULL;
GTK_PREVIEW (gbp)->type = GTK_PREVIEW_COLOR;
GTK_PREVIEW (gbp)->bpp = 3;
GTK_PREVIEW (gbp)->dither = GDK_RGB_DITHER_NORMAL;
gtk_widget_set_events (GTK_WIDGET (gbp), BRUSH_PREVIEW_EVENT_MASK);
}
GtkType
gimp_brush_preview_get_type ()
{
static GtkType gbp_type = 0;
if (!gbp_type)
{
GtkTypeInfo gbp_info =
{
"GimpBrushPreview",
sizeof (GimpBrushPreview),
sizeof (GimpBrushPreviewClass),
(GtkClassInitFunc) gimp_brush_preview_class_init,
(GtkObjectInitFunc) gimp_brush_preview_init,
/* reserved_1 */ NULL,
/* reserved_2 */ NULL,
(GtkClassInitFunc) NULL
};
gbp_type = gtk_type_unique (gtk_preview_get_type (), &gbp_info);
}
return gbp_type;
}
GtkWidget*
gimp_brush_preview_new (gint width,
gint height)
{
GimpBrushPreview *gbp;
g_return_val_if_fail (width > 0 && height > 0, NULL);
gbp = gtk_type_new (gimp_brush_preview_get_type ());
gbp->width = width;
gbp->height = height;
gtk_preview_size (GTK_PREVIEW (gbp), width, height);
return GTK_WIDGET (gbp);
}
void
gimp_brush_preview_update (GimpBrushPreview *gbp,
GimpBrush *brush)
{
g_return_if_fail (GIMP_IS_BRUSH_PREVIEW (gbp));
g_return_if_fail (GIMP_IS_BRUSH (brush));
if (gbp->brush == brush)
return;
gbp->brush = brush;
gtk_signal_connect (GTK_OBJECT (gbp->brush), "destroy",
gtk_widget_destroyed, &gbp->brush);
gimp_brush_preview_draw (gbp);
if (gbp->tooltips)
gtk_tooltips_set_tip (gbp->tooltips, GTK_WIDGET (gbp), gbp->brush->name, NULL);
}
void
gimp_brush_preview_set_tooltips (GimpBrushPreview *gbp,
GtkTooltips *tooltips)
{
g_return_if_fail (GIMP_IS_BRUSH_PREVIEW (gbp));
g_return_if_fail (GTK_IS_TOOLTIPS (tooltips));
gbp->tooltips = tooltips;
gtk_signal_connect (GTK_OBJECT (gbp->tooltips), "destroy",
gtk_widget_destroyed, &gbp->tooltips);
if (gbp->brush)
gtk_tooltips_set_tip (gbp->tooltips, GTK_WIDGET (gbp), gbp->brush->name, NULL);
}
static gint
gimp_brush_preview_button_press_event (GtkWidget *widget,
GdkEventButton *bevent)
{
if (bevent->button == 1)
{
gtk_signal_emit_by_name (GTK_OBJECT (widget), "clicked");
gimp_brush_preview_popup_open (GIMP_BRUSH_PREVIEW (widget),
bevent->x, bevent->y);
}
return TRUE;
}
static gint
gimp_brush_preview_button_release_event (GtkWidget *widget,
GdkEventButton *bevent)
{
if (bevent->button == 1)
gimp_brush_preview_popup_close (GIMP_BRUSH_PREVIEW (widget));
return TRUE;
}
static void
gimp_brush_preview_popup_open (GimpBrushPreview *gbp,
gint x,
gint y)
{
gint x_org, y_org;
gint scr_w, scr_h;
guchar *mask, *buf, *b;
gint width, height;
guchar bg;
width = gbp->brush->mask->width;
height = gbp->brush->mask->height;
if (width <= gbp->width && height <= gbp->height)
return;
/* make sure the popup exists and is not visible */
if (gbp->popup == NULL)
{
GtkWidget *frame;
gbp->popup = gtk_window_new (GTK_WINDOW_POPUP);
gtk_window_set_policy (GTK_WINDOW (gbp->popup), FALSE, FALSE, TRUE);
gtk_signal_connect (GTK_OBJECT (gbp->popup), "destroy",
gtk_widget_destroyed, &gbp->popup);
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_OUT);
gtk_container_add (GTK_CONTAINER (gbp->popup), frame);
gtk_widget_show (frame);
gbp->popup_preview = gtk_preview_new (GTK_PREVIEW_COLOR);
gtk_signal_connect (GTK_OBJECT (gbp->popup_preview), "destroy",
gtk_widget_destroyed, &gbp->popup_preview);
gtk_container_add (GTK_CONTAINER (frame), gbp->popup_preview);
gtk_widget_show (gbp->popup_preview);
}
else
{
gtk_widget_hide (gbp->popup);
}
/* decide where to put the popup */
gdk_window_get_origin (GTK_WIDGET (gbp)->window, &x_org, &y_org);
scr_w = gdk_screen_width ();
scr_h = gdk_screen_height ();
x = x_org + x - (width >> 1);
y = y_org + y - (height >> 1);
x = (x < 0) ? 0 : x;
y = (y < 0) ? 0 : y;
x = (x + width > scr_w) ? scr_w - width : x;
y = (y + height > scr_h) ? scr_h - height : y;
gtk_preview_size (GTK_PREVIEW (gbp->popup_preview), width, height);
gtk_widget_popup (gbp->popup, x, y);
/* Draw the brush */
buf = g_new (guchar, 3 * width);
mask = temp_buf_data (gbp->brush->mask);
if (GIMP_IS_BRUSH_PIXMAP (gbp->brush))
{
guchar *pixmap = temp_buf_data (GIMP_BRUSH_PIXMAP (gbp->brush)->pixmap_mask);
for (y = 0; y < height; y++)
{
b = buf;
for (x = 0; x < width ; x++)
{
bg = (255 - *mask);
*b++ = bg + (*mask * *pixmap++) / 255;
*b++ = bg + (*mask * *pixmap++) / 255;
*b++ = bg + (*mask * *pixmap++) / 255;
mask++;
}
gtk_preview_draw_row (GTK_PREVIEW (gbp->popup_preview), buf, 0, y, width);
}
}
else
{
for (y = 0; y < height; y++)
{
b = buf;
/* Invert the mask for display. */
for (x = 0; x < width; x++)
{
bg = 255 - *mask++;
memset (b, bg, 3);
b += 3;
}
gtk_preview_draw_row (GTK_PREVIEW (gbp->popup_preview), buf, 0, y, width);
}
}
g_free(buf);
gtk_widget_queue_draw (gbp->popup_preview);
}
static void
gimp_brush_preview_popup_close (GimpBrushPreview *gbp)
{
if (gbp->popup != NULL)
gtk_widget_hide (gbp->popup);
}
static void
gimp_brush_preview_draw (GimpBrushPreview *gbp)
{
gboolean scale = FALSE;
gint brush_width, brush_height;
gint offset_x, offset_y;
TempBuf *mask_buf, *pixmap_buf = NULL;
guchar *mask, *buf, *b;
guchar bg;
gint x, y;
g_return_if_fail (gbp->brush != NULL);
brush_width = gbp->brush->mask->width;
brush_height = gbp->brush->mask->height;
if (brush_width > gbp->width || brush_height > gbp->height)
{
gdouble ratio_x = (gdouble)brush_width / gbp->width;
gdouble ratio_y = (gdouble)brush_height / gbp->height;
brush_width = (gdouble)brush_width / MAX (ratio_x, ratio_y);
brush_height = (gdouble)brush_height / MAX (ratio_x, ratio_y);
mask_buf = brush_scale_mask (gbp->brush->mask, brush_width, brush_height);
if (GIMP_IS_BRUSH_PIXMAP (gbp->brush))
{
/* TODO: the scale function should scale the pixmap
and the mask in one run */
pixmap_buf = brush_scale_pixmap (GIMP_BRUSH_PIXMAP(gbp->brush)->pixmap_mask,
brush_width, brush_height);
}
scale = TRUE;
}
else
{
mask_buf = gbp->brush->mask;
if (GIMP_IS_BRUSH_PIXMAP (gbp->brush))
pixmap_buf = GIMP_BRUSH_PIXMAP(gbp->brush)->pixmap_mask;
}
offset_x = (gbp->width - brush_width) >> 1;
offset_y = (gbp->height - brush_height) >> 1;
mask = temp_buf_data (mask_buf);
buf = g_new (guchar, 3 * gbp->width);
memset (buf, 255, 3 * gbp->width);
if (GIMP_IS_BRUSH_PIXMAP (gbp->brush))
{
guchar *pixmap = temp_buf_data (pixmap_buf);
for (y = 0; y < offset_y; y++)
gtk_preview_draw_row (GTK_PREVIEW (gbp), buf, 0, y, gbp->width);
for (y = offset_y; y < brush_height + offset_y; y++)
{
b = buf + 3 * offset_x;
for (x = 0; x < brush_width ; x++)
{
bg = (255 - *mask);
*b++ = bg + (*mask * *pixmap++) / 255;
*b++ = bg + (*mask * *pixmap++) / 255;
*b++ = bg + (*mask * *pixmap++) / 255;
mask++;
}
gtk_preview_draw_row (GTK_PREVIEW (gbp), buf, 0, y, gbp->width);
}
memset (buf, 255, 3 * gbp->width);
for (y = brush_height + offset_y; y < gbp->height; y++)
gtk_preview_draw_row (GTK_PREVIEW (gbp), buf, 0, y, gbp->width);
}
else
{
for (y = 0; y < offset_y; y++)
gtk_preview_draw_row (GTK_PREVIEW (gbp), buf, 0, y, gbp->width);
for (y = offset_y; y < brush_height + offset_y; y++)
{
b = buf + 3 * offset_x;
for (x = 0; x < brush_width ; x++)
{
bg = 255 - *mask++;
memset (b, bg, 3);
b += 3;
}
gtk_preview_draw_row (GTK_PREVIEW (gbp), buf, 0, y, gbp->width);
}
memset (buf, 255, 3 * gbp->width);
for (y = brush_height + offset_y; y < gbp->height; y++)
gtk_preview_draw_row (GTK_PREVIEW (gbp), buf, 0, y, gbp->width);
}
if (scale)
{
offset_x = gbp->width - scale_indicator_width - 1;
offset_y = gbp->height - scale_indicator_height - 1;
for (y = 0; y < scale_indicator_height; y++)
gtk_preview_draw_row (GTK_PREVIEW (gbp), scale_indicator_bits[y][0],
offset_x, offset_y + y, scale_indicator_width);
temp_buf_free (mask_buf);
if (GIMP_IS_BRUSH_PIXMAP (gbp->brush))
temp_buf_free (pixmap_buf);
}
g_free(buf);
gtk_widget_queue_draw (GTK_WIDGET (gbp));
}
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