gtk2/modules/engines/pixbuf/pixbuf-render.c

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2000-02-07 02:36:39 +00:00
/* GTK+ Pixbuf Engine
* Copyright (C) 1998-2000 Red Hat, Inc.
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*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
* Written by Owen Taylor <otaylor@redhat.com>, based on code by
* Carsten Haitzler <raster@rasterman.com>
*/
#include "pixmap_theme.h"
#include <gdk-pixbuf/gdk-pixbuf.h>
GCache *pixbuf_cache = NULL;
static void
pixbuf_render (GdkPixbuf *src,
GdkWindow *window,
GdkBitmap *mask,
GdkRectangle *clip_rect,
gint src_x,
gint src_y,
gint src_width,
gint src_height,
gint dest_x,
gint dest_y,
gint dest_width,
gint dest_height)
{
GdkPixbuf *tmp_pixbuf;
GdkRectangle rect;
int x_offset, y_offset;
if (dest_width <= 0 || dest_height <= 0)
return;
rect.x = dest_x;
rect.y = dest_y;
rect.width = dest_width;
rect.height = dest_height;
/* FIXME: we need the full mask, not a partial mask; the following is, however,
* horribly expensive
*/
if (!mask && clip_rect && !gdk_rectangle_intersect (clip_rect, &rect, &rect))
return;
if (dest_width != src->art_pixbuf->width ||
dest_height != src->art_pixbuf->height)
{
ArtPixBuf *partial_src_art;
GdkPixbuf *partial_src_gdk;
if (src->art_pixbuf->n_channels == 3)
{
partial_src_art =
art_pixbuf_new_const_rgb (src->art_pixbuf->pixels + src_y * src->art_pixbuf->rowstride + src_x * src->art_pixbuf->n_channels,
src_width,
src_height,
src->art_pixbuf->rowstride);
}
else
{
partial_src_art =
art_pixbuf_new_const_rgba (src->art_pixbuf->pixels + src_y * src->art_pixbuf->rowstride + src_x * src->art_pixbuf->n_channels,
src_width,
src_height,
src->art_pixbuf->rowstride);
}
partial_src_gdk = gdk_pixbuf_new_from_art_pixbuf (partial_src_art);
tmp_pixbuf = gdk_pixbuf_new (ART_PIX_RGB, src->art_pixbuf->has_alpha, 8, rect.width, rect.height);
gdk_pixbuf_scale (partial_src_gdk, tmp_pixbuf, 0, 0, rect.width, rect.height,
dest_x - rect.x, dest_y - rect.y,
(double)dest_width / src_width, (double)dest_height / src_height,
ART_FILTER_BILINEAR);
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gdk_pixbuf_unref (partial_src_gdk);
x_offset = 0;
y_offset = 0;
}
else
{
tmp_pixbuf = src;
gdk_pixbuf_ref (tmp_pixbuf);
x_offset = src_x + rect.x - dest_x;
y_offset = src_y + rect.y - dest_y;
}
if (mask)
{
GdkGC *tmp_gc;
gdk_pixbuf_render_threshold_alpha (tmp_pixbuf, mask,
x_offset, y_offset,
rect.x, rect.y,
rect.width, rect.height,
128);
tmp_gc = gdk_gc_new (window);
gdk_pixbuf_render_to_drawable (tmp_pixbuf, window, tmp_gc,
x_offset, y_offset,
rect.x, rect.y,
rect.width, rect.height,
GDK_RGB_DITHER_NORMAL,
0, 0);
gdk_gc_unref (tmp_gc);
}
else
gdk_pixbuf_render_to_drawable_alpha (tmp_pixbuf, window,
x_offset, y_offset,
rect.x, rect.y,
rect.width, rect.height,
GDK_PIXBUF_ALPHA_BILEVEL, 128,
GDK_RGB_DITHER_NORMAL,
0, 0);
gdk_pixbuf_unref (tmp_pixbuf);
}
ThemePixbuf *
theme_pixbuf_new (void)
{
ThemePixbuf *result = g_new (ThemePixbuf, 1);
result->filename = NULL;
result->pixbuf = NULL;
result->stretch = TRUE;
result->border_left = 0;
result->border_right = 0;
result->border_bottom = 0;
result->border_top = 0;
return result;
}
void
theme_pixbuf_destroy (ThemePixbuf *theme_pb)
{
if (theme_pb->pixbuf)
g_cache_remove (pixbuf_cache, theme_pb->pixbuf);
}
void
theme_pixbuf_set_filename (ThemePixbuf *theme_pb,
const char *filename)
{
if (theme_pb->pixbuf)
{
g_cache_remove (pixbuf_cache, theme_pb->pixbuf);
theme_pb->pixbuf = NULL;
}
if (theme_pb->filename)
g_free (theme_pb->filename);
theme_pb->filename = g_strdup (filename);
}
void
theme_pixbuf_set_border (ThemePixbuf *theme_pb,
gint left,
gint right,
gint top,
gint bottom)
{
theme_pb->border_left = left;
theme_pb->border_right = right;
theme_pb->border_top = top;
theme_pb->border_bottom = bottom;
}
void
theme_pixbuf_set_stretch (ThemePixbuf *theme_pb,
gboolean stretch)
{
theme_pb->stretch = stretch;
}
GdkPixbuf *
pixbuf_cache_value_new (gchar *filename)
{
GdkPixbuf *result = gdk_pixbuf_new_from_file (filename);
if (!result)
g_warning("Pixbuf theme: Cannot load pixmap file %s\n", filename);
return result;
}
GdkPixbuf *
theme_pixbuf_get_pixbuf (ThemePixbuf *theme_pb)
{
if (!theme_pb->pixbuf)
{
if (!pixbuf_cache)
pixbuf_cache = g_cache_new ((GCacheNewFunc)pixbuf_cache_value_new,
(GCacheDestroyFunc)gdk_pixbuf_unref,
(GCacheDupFunc)g_strdup,
(GCacheDestroyFunc)g_free,
g_str_hash, g_direct_hash, g_str_equal);
theme_pb->pixbuf = g_cache_insert (pixbuf_cache, theme_pb->filename);
}
return theme_pb->pixbuf;
}
void
theme_pixbuf_render (ThemePixbuf *theme_pb,
GdkWindow *window,
GdkBitmap *mask,
GdkRectangle *clip_rect,
guint component_mask,
gboolean center,
gint x,
gint y,
gint width,
gint height)
{
GdkPixbuf *pixbuf = theme_pixbuf_get_pixbuf (theme_pb);
gint src_x[4], src_y[4], dest_x[4], dest_y[4];
if (!pixbuf)
return;
if (theme_pb->stretch)
{
src_x[0] = 0;
src_x[1] = theme_pb->border_left;
src_x[2] = pixbuf->art_pixbuf->width - theme_pb->border_right;
src_x[3] = pixbuf->art_pixbuf->width;
src_y[0] = 0;
src_y[1] = theme_pb->border_top;
src_y[2] = pixbuf->art_pixbuf->height - theme_pb->border_bottom;
src_y[3] = pixbuf->art_pixbuf->height;
dest_x[0] = x;
dest_x[1] = x + theme_pb->border_left;
dest_x[2] = x + width - theme_pb->border_right;
dest_x[3] = x + width;
dest_y[0] = y;
dest_y[1] = y + theme_pb->border_top;
dest_y[2] = y + height - theme_pb->border_bottom;
dest_y[3] = y + height;
if (component_mask & COMPONENT_ALL)
component_mask = (COMPONENT_ALL - 1) & ~component_mask;
#define RENDER_COMPONENT(X1,X2,Y1,Y2) \
pixbuf_render (pixbuf, window, mask, clip_rect, \
src_x[X1], src_y[Y1], \
src_x[X2] - src_x[X1], src_y[Y2] - src_y[Y1], \
dest_x[X1], dest_y[Y1], \
dest_x[X2] - dest_x[X1], dest_y[Y2] - dest_y[Y1]);
if (component_mask & COMPONENT_NORTH_WEST)
RENDER_COMPONENT (0, 1, 0, 1);
if (component_mask & COMPONENT_NORTH)
RENDER_COMPONENT (1, 2, 0, 1);
if (component_mask & COMPONENT_NORTH_EAST)
RENDER_COMPONENT (2, 3, 0, 1);
if (component_mask & COMPONENT_WEST)
RENDER_COMPONENT (0, 1, 1, 2);
if (component_mask & COMPONENT_CENTER)
RENDER_COMPONENT (1, 2, 1, 2);
if (component_mask & COMPONENT_EAST)
RENDER_COMPONENT (2, 3, 1, 2);
if (component_mask & COMPONENT_SOUTH_WEST)
RENDER_COMPONENT (0, 1, 2, 3);
if (component_mask & COMPONENT_SOUTH)
RENDER_COMPONENT (1, 2, 2, 3);
if (component_mask & COMPONENT_SOUTH_EAST)
RENDER_COMPONENT (2, 3, 2, 3);
}
else
{
if (center)
{
x += (width - pixbuf->art_pixbuf->width) / 2;
y += (height - pixbuf->art_pixbuf->height) / 2;
pixbuf_render (pixbuf, window, NULL, clip_rect,
0, 0,
pixbuf->art_pixbuf->width, pixbuf->art_pixbuf->height,
x, y,
pixbuf->art_pixbuf->width, pixbuf->art_pixbuf->height);
}
else
{
GdkPixmap *tmp_pixmap;
GdkGC *tmp_gc;
GdkGCValues gc_values;
tmp_pixmap = gdk_pixmap_new (window,
pixbuf->art_pixbuf->width,
pixbuf->art_pixbuf->height,
-1);
tmp_gc = gdk_gc_new (tmp_pixmap);
gdk_pixbuf_render_to_drawable (pixbuf, tmp_pixmap, tmp_gc,
0, 0,
0, 0,
pixbuf->art_pixbuf->width, pixbuf->art_pixbuf->height,
GDK_RGB_DITHER_NORMAL,
0, 0);
gdk_gc_unref (tmp_gc);
gc_values.fill = GDK_TILED;
gc_values.tile = tmp_pixmap;
tmp_gc = gdk_gc_new_with_values (window,
&gc_values, GDK_GC_FILL | GDK_GC_TILE);
if (clip_rect)
gdk_draw_rectangle (window, tmp_gc, TRUE,
clip_rect->x, clip_rect->y, clip_rect->width, clip_rect->height);
else
gdk_draw_rectangle (window, tmp_gc, TRUE, x, y, width, height);
gdk_gc_unref (tmp_gc);
gdk_pixmap_unref (tmp_pixmap);
}
}
}