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gtk/gdk/win32/gdkgc-win32.c
Matthias Clasen 82ce59cd0f Remove unnecessary NULL checks before g_free(). (#369666, Morten Welinder, 
2007-03-09  Matthias Clasen <mclasen@redhat.com>

        * Everywhere: Remove unnecessary NULL checks before
        g_free().  (#369666, Morten Welinder, Djihed Afifi)

        * configure.in: Check for ftw.h



svn path=/trunk/; revision=17444
2007-03-09 21:57:37 +00:00

1147 lines
33 KiB
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/* GDK - The GIMP Drawing Kit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
* Copyright (C) 1998-2004 Tor Lillqvist
* Copyright (C) 2000-2004 Hans Breuer
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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.
*/
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#define LINE_ATTRIBUTES (GDK_GC_LINE_WIDTH|GDK_GC_LINE_STYLE| \
GDK_GC_CAP_STYLE|GDK_GC_JOIN_STYLE)
#include <config.h>
#include <string.h>
#include "gdkgc.h"
#include "gdkfont.h"
#include "gdkpixmap.h"
#include "gdkregion-generic.h"
#include "gdkprivate-win32.h"
static void gdk_win32_gc_get_values (GdkGC *gc,
GdkGCValues *values);
static void gdk_win32_gc_set_values (GdkGC *gc,
GdkGCValues *values,
GdkGCValuesMask values_mask);
static void gdk_win32_gc_set_dashes (GdkGC *gc,
gint dash_offset,
gint8 dash_list[],
gint n);
static void gdk_gc_win32_class_init (GdkGCWin32Class *klass);
static void gdk_gc_win32_finalize (GObject *object);
static gpointer parent_class = NULL;
GType
_gdk_gc_win32_get_type (void)
{
static GType object_type = 0;
if (!object_type)
{
static const GTypeInfo object_info =
{
sizeof (GdkGCWin32Class),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gdk_gc_win32_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GdkGCWin32),
0, /* n_preallocs */
(GInstanceInitFunc) NULL,
};
object_type = g_type_register_static (GDK_TYPE_GC,
"GdkGCWin32",
&object_info, 0);
}
return object_type;
}
static void
gdk_gc_win32_class_init (GdkGCWin32Class *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GdkGCClass *gc_class = GDK_GC_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
object_class->finalize = gdk_gc_win32_finalize;
gc_class->get_values = gdk_win32_gc_get_values;
gc_class->set_values = gdk_win32_gc_set_values;
gc_class->set_dashes = gdk_win32_gc_set_dashes;
}
static void
gdk_gc_win32_finalize (GObject *object)
{
GdkGCWin32 *win32_gc = GDK_GC_WIN32 (object);
if (win32_gc->hcliprgn != NULL)
DeleteObject (win32_gc->hcliprgn);
if (win32_gc->values_mask & GDK_GC_FONT)
gdk_font_unref (win32_gc->font);
g_free (win32_gc->pen_dashes);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
fixup_pen (GdkGCWin32 *win32_gc)
{
win32_gc->pen_style = 0;
/* First look at GDK width and end cap style, set GDI pen type and
* end cap.
*/
if (win32_gc->pen_width == 0 &&
win32_gc->cap_style == GDK_CAP_NOT_LAST)
{
/* Use a cosmetic pen, always width 1 */
win32_gc->pen_style |= PS_COSMETIC;
}
else if (win32_gc->pen_width <= 1 &&
win32_gc->cap_style == GDK_CAP_BUTT)
{
/* For 1 pixel wide lines PS_ENDCAP_ROUND means draw both ends,
* even for one pixel length lines. But if we are drawing dashed
* lines we can't use PS_ENDCAP_ROUND.
*/
if (win32_gc->line_style == GDK_LINE_SOLID)
win32_gc->pen_style |= PS_GEOMETRIC | PS_ENDCAP_ROUND;
else
win32_gc->pen_style |= PS_GEOMETRIC | PS_ENDCAP_FLAT;
}
else
{
win32_gc->pen_style |= PS_GEOMETRIC;
switch (win32_gc->cap_style)
{
/* For non-zero-width lines X11's CapNotLast works like CapButt */
case GDK_CAP_NOT_LAST:
case GDK_CAP_BUTT:
win32_gc->pen_style |= PS_ENDCAP_FLAT;
break;
case GDK_CAP_ROUND:
win32_gc->pen_style |= PS_ENDCAP_ROUND;
break;
case GDK_CAP_PROJECTING:
win32_gc->pen_style |= PS_ENDCAP_SQUARE;
break;
}
}
/* Next look at GDK line style, set GDI pen style attribute */
switch (win32_gc->line_style)
{
case GDK_LINE_SOLID:
win32_gc->pen_style |= PS_SOLID;
break;
case GDK_LINE_ON_OFF_DASH:
case GDK_LINE_DOUBLE_DASH:
if (win32_gc->pen_dashes == NULL)
{
win32_gc->pen_dashes = g_new (DWORD, 1);
win32_gc->pen_dashes[0] = 4;
win32_gc->pen_num_dashes = 1;
}
if (!(win32_gc->pen_style & PS_TYPE_MASK) == PS_GEOMETRIC &&
win32_gc->pen_dashes[0] == 1 &&
(win32_gc->pen_num_dashes == 1 ||
(win32_gc->pen_num_dashes == 2 && win32_gc->pen_dashes[0] == 1)))
win32_gc->pen_style |= PS_ALTERNATE;
else
win32_gc->pen_style |= PS_USERSTYLE;
break;
}
/* Last, for if the GDI pen is geometric, set the join attribute */
if ((win32_gc->pen_style & PS_TYPE_MASK) == PS_GEOMETRIC)
{
switch (win32_gc->join_style)
{
case GDK_JOIN_MITER:
win32_gc->pen_style |= PS_JOIN_MITER;
break;
case GDK_JOIN_ROUND:
win32_gc->pen_style |= PS_JOIN_ROUND;
break;
case GDK_JOIN_BEVEL:
win32_gc->pen_style |= PS_JOIN_BEVEL;
break;
}
}
}
static void
gdk_win32_gc_values_to_win32values (GdkGCValues *values,
GdkGCValuesMask mask,
GdkGCWin32 *win32_gc)
{
char *s = "";
GDK_NOTE (GC, g_print ("{"));
if (mask & GDK_GC_FOREGROUND)
{
win32_gc->values_mask |= GDK_GC_FOREGROUND;
GDK_NOTE (GC, (g_print ("fg=%.06x",
_gdk_gc_get_fg_pixel (&win32_gc->parent_instance)),
s = ","));
}
if (mask & GDK_GC_BACKGROUND)
{
win32_gc->values_mask |= GDK_GC_BACKGROUND;
GDK_NOTE (GC, (g_print ("%sbg=%.06x", s,
_gdk_gc_get_bg_pixel (&win32_gc->parent_instance)),
s = ","));
}
if ((mask & GDK_GC_FONT) && (values->font->type == GDK_FONT_FONT
|| values->font->type == GDK_FONT_FONTSET))
{
if (win32_gc->font != NULL)
gdk_font_unref (win32_gc->font);
win32_gc->font = values->font;
if (win32_gc->font != NULL)
{
gdk_font_ref (win32_gc->font);
win32_gc->values_mask |= GDK_GC_FONT;
GDK_NOTE (GC, (g_print ("%sfont=%p", s, win32_gc->font),
s = ","));
}
else
{
win32_gc->values_mask &= ~GDK_GC_FONT;
GDK_NOTE (GC, (g_print ("%sfont=NULL", s),
s = ","));
}
}
if (mask & GDK_GC_FUNCTION)
{
GDK_NOTE (GC, (g_print ("%srop2=", s),
s = ","));
switch (values->function)
{
#define CASE(x,y) case GDK_##x: win32_gc->rop2 = R2_##y; GDK_NOTE (GC, g_print (#y)); break
CASE (COPY, COPYPEN);
CASE (INVERT, NOT);
CASE (XOR, XORPEN);
CASE (CLEAR, BLACK);
CASE (AND, MASKPEN);
CASE (AND_REVERSE, MASKPENNOT);
CASE (AND_INVERT, MASKNOTPEN);
CASE (NOOP, NOP);
CASE (OR, MERGEPEN);
CASE (EQUIV, NOTXORPEN);
CASE (OR_REVERSE, MERGEPENNOT);
CASE (COPY_INVERT, NOTCOPYPEN);
CASE (OR_INVERT, MERGENOTPEN);
CASE (NAND, NOTMASKPEN);
CASE (NOR, NOTMERGEPEN);
CASE (SET, WHITE);
#undef CASE
}
win32_gc->values_mask |= GDK_GC_FUNCTION;
}
if (mask & GDK_GC_FILL)
{
win32_gc->values_mask |= GDK_GC_FILL;
GDK_NOTE (GC, (g_print ("%sfill=%s", s,
_gdk_win32_fill_style_to_string (values->fill)),
s = ","));
}
if (mask & GDK_GC_TILE)
{
if (values->tile != NULL)
{
win32_gc->values_mask |= GDK_GC_TILE;
GDK_NOTE (GC,
(g_print ("%stile=%p", s,
GDK_PIXMAP_HBITMAP (values->tile)),
s = ","));
}
else
{
win32_gc->values_mask &= ~GDK_GC_TILE;
GDK_NOTE (GC, (g_print ("%stile=NULL", s),
s = ","));
}
}
if (mask & GDK_GC_STIPPLE)
{
if (values->stipple != NULL)
{
win32_gc->values_mask |= GDK_GC_STIPPLE;
GDK_NOTE (GC,
(g_print ("%sstipple=%p", s,
GDK_PIXMAP_HBITMAP (values->stipple)),
s = ","));
}
else
{
win32_gc->values_mask &= ~GDK_GC_STIPPLE;
GDK_NOTE (GC, (g_print ("%sstipple=NULL", s),
s = ","));
}
}
if (mask & GDK_GC_CLIP_MASK)
{
if (win32_gc->hcliprgn != NULL)
DeleteObject (win32_gc->hcliprgn);
if (values->clip_mask != NULL)
{
win32_gc->hcliprgn = _gdk_win32_bitmap_to_hrgn (values->clip_mask);
win32_gc->values_mask |= GDK_GC_CLIP_MASK;
}
else
{
win32_gc->hcliprgn = NULL;
win32_gc->values_mask &= ~GDK_GC_CLIP_MASK;
}
GDK_NOTE (GC, (g_print ("%sclip=%p", s, win32_gc->hcliprgn),
s = ","));
}
if (mask & GDK_GC_SUBWINDOW)
{
win32_gc->subwindow_mode = values->subwindow_mode;
win32_gc->values_mask |= GDK_GC_SUBWINDOW;
GDK_NOTE (GC, (g_print ("%ssubw=%d", s, win32_gc->subwindow_mode),
s = ","));
}
if (mask & GDK_GC_TS_X_ORIGIN)
{
win32_gc->values_mask |= GDK_GC_TS_X_ORIGIN;
GDK_NOTE (GC, (g_print ("%sts_x=%d", s, values->ts_x_origin),
s = ","));
}
if (mask & GDK_GC_TS_Y_ORIGIN)
{
win32_gc->values_mask |= GDK_GC_TS_Y_ORIGIN;
GDK_NOTE (GC, (g_print ("%sts_y=%d", s, values->ts_y_origin),
s = ","));
}
if (mask & GDK_GC_CLIP_X_ORIGIN)
{
win32_gc->values_mask |= GDK_GC_CLIP_X_ORIGIN;
GDK_NOTE (GC, (g_print ("%sclip_x=%d", s, values->clip_x_origin),
s = ","));
}
if (mask & GDK_GC_CLIP_Y_ORIGIN)
{
win32_gc->values_mask |= GDK_GC_CLIP_Y_ORIGIN;
GDK_NOTE (GC, (g_print ("%sclip_y=%d", s, values->clip_y_origin),
s = ","));
}
if (mask & GDK_GC_EXPOSURES)
{
win32_gc->graphics_exposures = values->graphics_exposures;
win32_gc->values_mask |= GDK_GC_EXPOSURES;
GDK_NOTE (GC, (g_print ("%sexp=%d", s, win32_gc->graphics_exposures),
s = ","));
}
if (mask & GDK_GC_LINE_WIDTH)
{
win32_gc->pen_width = values->line_width;
win32_gc->values_mask |= GDK_GC_LINE_WIDTH;
GDK_NOTE (GC, (g_print ("%spw=%d", s, win32_gc->pen_width),
s = ","));
}
if (mask & GDK_GC_LINE_STYLE)
{
win32_gc->line_style = values->line_style;
win32_gc->values_mask |= GDK_GC_LINE_STYLE;
}
if (mask & GDK_GC_CAP_STYLE)
{
win32_gc->cap_style = values->cap_style;
win32_gc->values_mask |= GDK_GC_CAP_STYLE;
}
if (mask & GDK_GC_JOIN_STYLE)
{
win32_gc->join_style = values->join_style;
win32_gc->values_mask |= GDK_GC_JOIN_STYLE;
}
if (mask & (GDK_GC_LINE_WIDTH|GDK_GC_LINE_STYLE|GDK_GC_CAP_STYLE|GDK_GC_JOIN_STYLE))
{
fixup_pen (win32_gc);
GDK_NOTE (GC, (g_print ("%sps|=PS_STYLE_%s|PS_ENDCAP_%s|PS_JOIN_%s", s,
_gdk_win32_psstyle_to_string (win32_gc->pen_style),
_gdk_win32_psendcap_to_string (win32_gc->pen_style),
_gdk_win32_psjoin_to_string (win32_gc->pen_style)),
s = ","));
}
GDK_NOTE (GC, g_print ("} mask=(%s)", _gdk_win32_gcvalues_mask_to_string (win32_gc->values_mask)));
}
GdkGC*
_gdk_win32_gc_new (GdkDrawable *drawable,
GdkGCValues *values,
GdkGCValuesMask values_mask)
{
GdkGC *gc;
GdkGCWin32 *win32_gc;
/* NOTICE that the drawable here has to be the impl drawable,
* not the publically-visible drawables.
*/
g_return_val_if_fail (GDK_IS_DRAWABLE_IMPL_WIN32 (drawable), NULL);
gc = g_object_new (_gdk_gc_win32_get_type (), NULL);
win32_gc = GDK_GC_WIN32 (gc);
_gdk_gc_init (gc, drawable, values, values_mask);
win32_gc->hcliprgn = NULL;
win32_gc->font = NULL;
win32_gc->rop2 = R2_COPYPEN;
win32_gc->subwindow_mode = GDK_CLIP_BY_CHILDREN;
win32_gc->graphics_exposures = TRUE;
win32_gc->pen_width = 0;
/* Don't get confused by the PS_ENDCAP_ROUND. For narrow GDI pens
* (width == 1), PS_GEOMETRIC|PS_ENDCAP_ROUND works like X11's
* CapButt.
*/
win32_gc->pen_style = PS_GEOMETRIC|PS_ENDCAP_ROUND|PS_JOIN_MITER;
win32_gc->line_style = GDK_LINE_SOLID;
win32_gc->cap_style = GDK_CAP_BUTT;
win32_gc->join_style = GDK_JOIN_MITER;
win32_gc->pen_dashes = NULL;
win32_gc->pen_num_dashes = 0;
win32_gc->pen_dash_offset = 0;
win32_gc->pen_hbrbg = NULL;
win32_gc->values_mask = GDK_GC_FUNCTION | GDK_GC_FILL;
GDK_NOTE (GC, g_print ("_gdk_win32_gc_new: %p: ", win32_gc));
gdk_win32_gc_values_to_win32values (values, values_mask, win32_gc);
GDK_NOTE (GC, g_print ("\n"));
win32_gc->hdc = NULL;
return gc;
}
static void
gdk_win32_gc_get_values (GdkGC *gc,
GdkGCValues *values)
{
GdkGCWin32 *win32_gc = GDK_GC_WIN32 (gc);
values->foreground.pixel = _gdk_gc_get_fg_pixel (gc);
values->background.pixel = _gdk_gc_get_bg_pixel (gc);
values->font = win32_gc->font;
switch (win32_gc->rop2)
{
case R2_COPYPEN:
values->function = GDK_COPY; break;
case R2_NOT:
values->function = GDK_INVERT; break;
case R2_XORPEN:
values->function = GDK_XOR; break;
case R2_BLACK:
values->function = GDK_CLEAR; break;
case R2_MASKPEN:
values->function = GDK_AND; break;
case R2_MASKPENNOT:
values->function = GDK_AND_REVERSE; break;
case R2_MASKNOTPEN:
values->function = GDK_AND_INVERT; break;
case R2_NOP:
values->function = GDK_NOOP; break;
case R2_MERGEPEN:
values->function = GDK_OR; break;
case R2_NOTXORPEN:
values->function = GDK_EQUIV; break;
case R2_MERGEPENNOT:
values->function = GDK_OR_REVERSE; break;
case R2_NOTCOPYPEN:
values->function = GDK_COPY_INVERT; break;
case R2_MERGENOTPEN:
values->function = GDK_OR_INVERT; break;
case R2_NOTMASKPEN:
values->function = GDK_NAND; break;
case R2_NOTMERGEPEN:
values->function = GDK_NOR; break;
case R2_WHITE:
values->function = GDK_SET; break;
}
values->fill = _gdk_gc_get_fill (gc);
values->tile = _gdk_gc_get_tile (gc);
values->stipple = _gdk_gc_get_stipple (gc);
/* Also the X11 backend always returns a NULL clip_mask */
values->clip_mask = NULL;
values->subwindow_mode = win32_gc->subwindow_mode;
values->ts_x_origin = win32_gc->parent_instance.ts_x_origin;
values->ts_y_origin = win32_gc->parent_instance.ts_y_origin;
values->clip_x_origin = win32_gc->parent_instance.clip_x_origin;
values->clip_y_origin = win32_gc->parent_instance.clip_y_origin;
values->graphics_exposures = win32_gc->graphics_exposures;
values->line_width = win32_gc->pen_width;
values->line_style = win32_gc->line_style;
values->cap_style = win32_gc->cap_style;
values->join_style = win32_gc->join_style;
}
static void
gdk_win32_gc_set_values (GdkGC *gc,
GdkGCValues *values,
GdkGCValuesMask mask)
{
g_return_if_fail (GDK_IS_GC (gc));
GDK_NOTE (GC, g_print ("gdk_win32_gc_set_values: %p: ", GDK_GC_WIN32 (gc)));
gdk_win32_gc_values_to_win32values (values, mask, GDK_GC_WIN32 (gc));
GDK_NOTE (GC, g_print ("\n"));
}
static void
gdk_win32_gc_set_dashes (GdkGC *gc,
gint dash_offset,
gint8 dash_list[],
gint n)
{
GdkGCWin32 *win32_gc;
int i;
g_return_if_fail (GDK_IS_GC (gc));
g_return_if_fail (dash_list != NULL);
win32_gc = GDK_GC_WIN32 (gc);
win32_gc->pen_num_dashes = n;
g_free (win32_gc->pen_dashes);
win32_gc->pen_dashes = g_new (DWORD, n);
for (i = 0; i < n; i++)
win32_gc->pen_dashes[i] = dash_list[i];
win32_gc->pen_dash_offset = dash_offset;
fixup_pen (win32_gc);
}
void
_gdk_windowing_gc_set_clip_region (GdkGC *gc,
GdkRegion *region)
{
GdkGCWin32 *win32_gc = GDK_GC_WIN32 (gc);
if (win32_gc->hcliprgn)
DeleteObject (win32_gc->hcliprgn);
if (region)
{
GDK_NOTE (GC, g_print ("gdk_gc_set_clip_region: %p: %s\n",
win32_gc,
_gdk_win32_gdkregion_to_string (region)));
win32_gc->hcliprgn = _gdk_win32_gdkregion_to_hrgn (region, 0, 0);
win32_gc->values_mask |= GDK_GC_CLIP_MASK;
}
else
{
GDK_NOTE (GC, g_print ("gdk_gc_set_clip_region: NULL\n"));
win32_gc->hcliprgn = NULL;
win32_gc->values_mask &= ~GDK_GC_CLIP_MASK;
}
gc->clip_x_origin = 0;
gc->clip_y_origin = 0;
win32_gc->values_mask &= ~(GDK_GC_CLIP_X_ORIGIN | GDK_GC_CLIP_Y_ORIGIN);
}
void
_gdk_windowing_gc_copy (GdkGC *dst_gc,
GdkGC *src_gc)
{
GdkGCWin32 *dst_win32_gc = GDK_GC_WIN32 (dst_gc);
GdkGCWin32 *src_win32_gc = GDK_GC_WIN32 (src_gc);
GDK_NOTE (GC, g_print ("gdk_gc_copy: %p := %p\n", dst_win32_gc, src_win32_gc));
if (dst_win32_gc->hcliprgn != NULL)
DeleteObject (dst_win32_gc->hcliprgn);
if (dst_win32_gc->font != NULL)
gdk_font_unref (dst_win32_gc->font);
g_free (dst_win32_gc->pen_dashes);
dst_win32_gc->hcliprgn = src_win32_gc->hcliprgn;
if (dst_win32_gc->hcliprgn)
{
/* create a new region, to copy to */
dst_win32_gc->hcliprgn = CreateRectRgn (0,0,1,1);
/* overwrite from source */
CombineRgn (dst_win32_gc->hcliprgn, src_win32_gc->hcliprgn,
NULL, RGN_COPY);
}
dst_win32_gc->values_mask = src_win32_gc->values_mask;
dst_win32_gc->font = src_win32_gc->font;
if (dst_win32_gc->font != NULL)
gdk_font_ref (dst_win32_gc->font);
dst_win32_gc->rop2 = src_win32_gc->rop2;
dst_win32_gc->subwindow_mode = src_win32_gc->subwindow_mode;
dst_win32_gc->graphics_exposures = src_win32_gc->graphics_exposures;
dst_win32_gc->pen_width = src_win32_gc->pen_width;
dst_win32_gc->pen_style = src_win32_gc->pen_style;
dst_win32_gc->line_style = src_win32_gc->line_style;
dst_win32_gc->cap_style = src_win32_gc->cap_style;
dst_win32_gc->join_style = src_win32_gc->join_style;
if (src_win32_gc->pen_dashes)
dst_win32_gc->pen_dashes = g_memdup (src_win32_gc->pen_dashes,
sizeof (DWORD) * src_win32_gc->pen_num_dashes);
else
dst_win32_gc->pen_dashes = NULL;
dst_win32_gc->pen_num_dashes = src_win32_gc->pen_num_dashes;
dst_win32_gc->pen_dash_offset = src_win32_gc->pen_dash_offset;
dst_win32_gc->hdc = NULL;
dst_win32_gc->saved_dc = FALSE;
dst_win32_gc->holdpal = NULL;
dst_win32_gc->pen_hbrbg = NULL;
}
GdkScreen *
gdk_gc_get_screen (GdkGC *gc)
{
g_return_val_if_fail (GDK_IS_GC_WIN32 (gc), NULL);
return _gdk_screen;
}
static guint bitmask[9] = { 0, 1, 3, 7, 15, 31, 63, 127, 255 };
COLORREF
_gdk_win32_colormap_color (GdkColormap *colormap,
gulong pixel)
{
const GdkVisual *visual;
GdkColormapPrivateWin32 *colormap_private;
guchar r, g, b;
if (colormap == NULL)
return DIBINDEX (pixel & 1);
colormap_private = GDK_WIN32_COLORMAP_DATA (colormap);
g_assert (colormap_private != NULL);
visual = colormap->visual;
switch (visual->type)
{
case GDK_VISUAL_GRAYSCALE:
case GDK_VISUAL_PSEUDO_COLOR:
case GDK_VISUAL_STATIC_COLOR:
return PALETTEINDEX (pixel);
case GDK_VISUAL_TRUE_COLOR:
r = (pixel & visual->red_mask) >> visual->red_shift;
r = (r * 255) / bitmask[visual->red_prec];
g = (pixel & visual->green_mask) >> visual->green_shift;
g = (g * 255) / bitmask[visual->green_prec];
b = (pixel & visual->blue_mask) >> visual->blue_shift;
b = (b * 255) / bitmask[visual->blue_prec];
return RGB (r, g, b);
default:
g_assert_not_reached ();
return 0;
}
}
gboolean
predraw (GdkGC *gc,
GdkColormap *colormap)
{
GdkGCWin32 *win32_gc = (GdkGCWin32 *) gc;
GdkColormapPrivateWin32 *colormap_private;
gint k;
gboolean ok = TRUE;
if (colormap &&
(colormap->visual->type == GDK_VISUAL_PSEUDO_COLOR ||
colormap->visual->type == GDK_VISUAL_STATIC_COLOR))
{
colormap_private = GDK_WIN32_COLORMAP_DATA (colormap);
g_assert (colormap_private != NULL);
if (!(win32_gc->holdpal = SelectPalette (win32_gc->hdc, colormap_private->hpal, FALSE)))
WIN32_GDI_FAILED ("SelectPalette"), ok = FALSE;
else if ((k = RealizePalette (win32_gc->hdc)) == GDI_ERROR)
WIN32_GDI_FAILED ("RealizePalette"), ok = FALSE;
else if (k > 0)
GDK_NOTE (COLORMAP, g_print ("predraw: realized %p: %d colors\n",
colormap_private->hpal, k));
}
return ok;
}
static GdkDrawableImplWin32 *
get_impl_drawable (GdkDrawable *drawable)
{
if (GDK_IS_DRAWABLE_IMPL_WIN32 (drawable))
return GDK_DRAWABLE_IMPL_WIN32(drawable);
else if (GDK_IS_WINDOW (drawable))
return GDK_DRAWABLE_IMPL_WIN32 ((GDK_WINDOW_OBJECT (drawable))->impl);
else if (GDK_IS_PIXMAP (drawable))
return GDK_DRAWABLE_IMPL_WIN32 ((GDK_PIXMAP_OBJECT (drawable))->impl);
else
g_assert_not_reached ();
return NULL;
}
/**
* gdk_win32_hdc_get:
* @drawable: destination #GdkDrawable
* @gc: #GdkGC to use for drawing on @drawable
* @usage: mask indicating what properties needs to be set up
*
* Allocates a Windows device context handle (HDC) for drawing into
* @drawable, and sets it up appropriately according to @usage.
*
* Each #GdkGC can at one time have only one HDC associated with it.
*
* The following flags in @mask are handled:
*
* If %GDK_GC_FOREGROUND is set in @mask, a solid brush of the
* foreground color in @gc is selected into the HDC. The text color of
* the HDC is also set. If the @drawable has a palette (256-color
* mode), the palette is selected and realized.
*
* If any of the line attribute flags (%GDK_GC_LINE_WIDTH,
* %GDK_GC_LINE_STYLE, %GDK_GC_CAP_STYLE and %GDK_GC_JOIN_STYLE) is
* set in @mask, a solid pen of the foreground color and appropriate
* width and stule is created and selected into the HDC. Note that the
* dash properties are not completely implemented.
*
* If the %GDK_GC_FONT flag is set, the background mix mode is set to
* %TRANSPARENT. and the text alignment is set to
* %TA_BASELINE|%TA_LEFT. Note that no font gets selected into the HDC
* by this function.
*
* Some things are done regardless of @mask: If the function in @gc is
* any other than %GDK_COPY, the raster operation of the HDC is
* set. If @gc has a clip mask, the clip region of the HDC is set.
*
* Note that the fill style, tile, stipple, and tile and stipple
* origins in the @gc are ignored by this function. (In general, tiles
* and stipples can't be implemented directly on Win32; you need to do
* multiple pass drawing and blitting to implement tiles or
* stipples. GDK does just that when you call the GDK drawing
* functions with a GC that asks for tiles or stipples.)
*
* When the HDC is no longer used, it should be released by calling
* <function>gdk_win32_hdc_release()</function> with the same
* parameters.
*
* If you modify the HDC by calling <function>SelectObject</function>
* you should undo those modifications before calling
* <function>gdk_win32_hdc_release()</function>.
*
* Return value: The HDC.
**/
HDC
gdk_win32_hdc_get (GdkDrawable *drawable,
GdkGC *gc,
GdkGCValuesMask usage)
{
GdkGCWin32 *win32_gc = (GdkGCWin32 *) gc;
GdkDrawableImplWin32 *impl = NULL;
gboolean ok = TRUE;
COLORREF fg = RGB (0, 0, 0), bg = RGB (255, 255, 255);
HPEN hpen;
HBRUSH hbr;
g_assert (win32_gc->hdc == NULL);
impl = get_impl_drawable (drawable);
win32_gc->hdc = _gdk_win32_drawable_acquire_dc (GDK_DRAWABLE (impl));
ok = win32_gc->hdc != NULL;
if (ok && (win32_gc->saved_dc = SaveDC (win32_gc->hdc)) == 0)
WIN32_GDI_FAILED ("SaveDC"), ok = FALSE;
if (ok && (usage & (GDK_GC_FOREGROUND | GDK_GC_BACKGROUND)))
ok = predraw (gc, impl->colormap);
if (ok && (usage & GDK_GC_FOREGROUND))
{
fg = _gdk_win32_colormap_color (impl->colormap, _gdk_gc_get_fg_pixel (gc));
if ((hbr = CreateSolidBrush (fg)) == NULL)
WIN32_GDI_FAILED ("CreateSolidBrush"), ok = FALSE;
if (ok && SelectObject (win32_gc->hdc, hbr) == NULL)
WIN32_GDI_FAILED ("SelectObject"), ok = FALSE;
if (ok && SetTextColor (win32_gc->hdc, fg) == CLR_INVALID)
WIN32_GDI_FAILED ("SetTextColor"), ok = FALSE;
}
if (ok && (usage & LINE_ATTRIBUTES))
{
/* For drawing GDK_LINE_DOUBLE_DASH */
if ((usage & GDK_GC_BACKGROUND) && win32_gc->line_style == GDK_LINE_DOUBLE_DASH)
{
bg = _gdk_win32_colormap_color (impl->colormap, _gdk_gc_get_bg_pixel (gc));
if ((win32_gc->pen_hbrbg = CreateSolidBrush (bg)) == NULL)
WIN32_GDI_FAILED ("CreateSolidBrush"), ok = FALSE;
}
if (ok)
{
LOGBRUSH logbrush;
DWORD style_count = 0;
const DWORD *style = NULL;
/* Create and select pen */
logbrush.lbStyle = BS_SOLID;
logbrush.lbColor = fg;
logbrush.lbHatch = 0;
if ((win32_gc->pen_style & PS_STYLE_MASK) == PS_USERSTYLE)
{
style_count = win32_gc->pen_num_dashes;
style = win32_gc->pen_dashes;
}
if ((hpen = ExtCreatePen (win32_gc->pen_style,
MAX (win32_gc->pen_width, 1),
&logbrush,
style_count, style)) == NULL)
WIN32_GDI_FAILED ("ExtCreatePen"), ok = FALSE;
if (ok && SelectObject (win32_gc->hdc, hpen) == NULL)
WIN32_GDI_FAILED ("SelectObject"), ok = FALSE;
}
}
if (ok && (usage & GDK_GC_FONT))
{
if (SetBkMode (win32_gc->hdc, TRANSPARENT) == 0)
WIN32_GDI_FAILED ("SetBkMode"), ok = FALSE;
if (ok && SetTextAlign (win32_gc->hdc, TA_BASELINE|TA_LEFT|TA_NOUPDATECP) == GDI_ERROR)
WIN32_GDI_FAILED ("SetTextAlign"), ok = FALSE;
}
if (ok && win32_gc->rop2 != R2_COPYPEN)
if (SetROP2 (win32_gc->hdc, win32_gc->rop2) == 0)
WIN32_GDI_FAILED ("SetROP2"), ok = FALSE;
if (ok &&
(win32_gc->values_mask & GDK_GC_CLIP_MASK) &&
win32_gc->hcliprgn != NULL)
{
if (SelectClipRgn (win32_gc->hdc, win32_gc->hcliprgn) == ERROR)
WIN32_API_FAILED ("SelectClipRgn"), ok = FALSE;
if (ok && win32_gc->values_mask & (GDK_GC_CLIP_X_ORIGIN | GDK_GC_CLIP_Y_ORIGIN) &&
OffsetClipRgn (win32_gc->hdc,
win32_gc->values_mask & GDK_GC_CLIP_X_ORIGIN ? gc->clip_x_origin : 0,
win32_gc->values_mask & GDK_GC_CLIP_Y_ORIGIN ? gc->clip_y_origin : 0) == ERROR)
WIN32_API_FAILED ("OffsetClipRgn"), ok = FALSE;
}
else if (ok)
SelectClipRgn (win32_gc->hdc, NULL);
GDK_NOTE (GC, (g_print ("gdk_win32_hdc_get: %p (%s): ",
win32_gc, _gdk_win32_gcvalues_mask_to_string (usage)),
_gdk_win32_print_dc (win32_gc->hdc)));
return win32_gc->hdc;
}
/**
* gdk_win32_hdc_release:
* @drawable: destination #GdkDrawable
* @gc: #GdkGC to use for drawing on @drawable
* @usage: mask indicating what properties were set up
*
* This function deallocates the Windows device context allocated by
* <funcion>gdk_win32_hdc_get()</function>. It should be called with
* the same parameters.
**/
void
gdk_win32_hdc_release (GdkDrawable *drawable,
GdkGC *gc,
GdkGCValuesMask usage)
{
GdkGCWin32 *win32_gc = (GdkGCWin32 *) gc;
GdkDrawableImplWin32 *impl = NULL;
HGDIOBJ hpen = NULL;
HGDIOBJ hbr = NULL;
GDK_NOTE (GC, g_print ("gdk_win32_hdc_release: %p: %p (%s)\n",
win32_gc, win32_gc->hdc,
_gdk_win32_gcvalues_mask_to_string (usage)));
impl = get_impl_drawable (drawable);
if (win32_gc->holdpal != NULL)
{
gint k;
if (!SelectPalette (win32_gc->hdc, win32_gc->holdpal, FALSE))
WIN32_GDI_FAILED ("SelectPalette");
else if ((k = RealizePalette (win32_gc->hdc)) == GDI_ERROR)
WIN32_GDI_FAILED ("RealizePalette");
else if (k > 0)
GDK_NOTE (COLORMAP, g_print ("gdk_win32_hdc_release: realized %p: %d colors\n",
win32_gc->holdpal, k));
win32_gc->holdpal = NULL;
}
if (usage & LINE_ATTRIBUTES)
if ((hpen = GetCurrentObject (win32_gc->hdc, OBJ_PEN)) == NULL)
WIN32_GDI_FAILED ("GetCurrentObject");
if (usage & GDK_GC_FOREGROUND)
if ((hbr = GetCurrentObject (win32_gc->hdc, OBJ_BRUSH)) == NULL)
WIN32_GDI_FAILED ("GetCurrentObject");
GDI_CALL (RestoreDC, (win32_gc->hdc, win32_gc->saved_dc));
_gdk_win32_drawable_release_dc (GDK_DRAWABLE (impl));
if (hpen != NULL)
GDI_CALL (DeleteObject, (hpen));
if (hbr != NULL)
GDI_CALL (DeleteObject, (hbr));
if (win32_gc->pen_hbrbg != NULL)
GDI_CALL (DeleteObject, (win32_gc->pen_hbrbg));
win32_gc->hdc = NULL;
}
/* This function originally from Jean-Edouard Lachand-Robert, and
* available at www.codeguru.com. Simplified for our needs, not sure
* how much of the original code left any longer. Now handles just
* one-bit deep bitmaps (in Window parlance, ie those that GDK calls
* bitmaps (and not pixmaps), with zero pixels being transparent.
*/
/* _gdk_win32_bitmap_to_hrgn : Create a region from the
* "non-transparent" pixels of a bitmap.
*/
HRGN
_gdk_win32_bitmap_to_hrgn (GdkPixmap *pixmap)
{
HRGN hRgn = NULL;
HRGN h;
DWORD maxRects;
RGNDATA *pData;
guchar *bits;
gint width, height, bpl;
guchar *p;
gint x, y;
g_assert (GDK_PIXMAP_OBJECT(pixmap)->depth == 1);
bits = GDK_PIXMAP_IMPL_WIN32 (GDK_PIXMAP_OBJECT (pixmap)->impl)->bits;
width = GDK_PIXMAP_IMPL_WIN32 (GDK_PIXMAP_OBJECT (pixmap)->impl)->width;
height = GDK_PIXMAP_IMPL_WIN32 (GDK_PIXMAP_OBJECT (pixmap)->impl)->height;
bpl = ((width - 1)/32 + 1)*4;
/* For better performances, we will use the ExtCreateRegion()
* function to create the region. This function take a RGNDATA
* structure on entry. We will add rectangles by amount of
* ALLOC_UNIT number in this structure.
*/
#define ALLOC_UNIT 100
maxRects = ALLOC_UNIT;
pData = g_malloc (sizeof (RGNDATAHEADER) + (sizeof (RECT) * maxRects));
pData->rdh.dwSize = sizeof (RGNDATAHEADER);
pData->rdh.iType = RDH_RECTANGLES;
pData->rdh.nCount = pData->rdh.nRgnSize = 0;
SetRect (&pData->rdh.rcBound, MAXLONG, MAXLONG, 0, 0);
for (y = 0; y < height; y++)
{
/* Scan each bitmap row from left to right*/
p = (guchar *) bits + y * bpl;
for (x = 0; x < width; x++)
{
/* Search for a continuous range of "non transparent pixels"*/
gint x0 = x;
while (x < width)
{
if ((((p[x/8])>>(7-(x%8)))&1) == 0)
/* This pixel is "transparent"*/
break;
x++;
}
if (x > x0)
{
RECT *pr;
/* Add the pixels (x0, y) to (x, y+1) as a new rectangle
* in the region
*/
if (pData->rdh.nCount >= maxRects)
{
maxRects += ALLOC_UNIT;
pData = g_realloc (pData, sizeof(RGNDATAHEADER)
+ (sizeof(RECT) * maxRects));
}
pr = (RECT *) &pData->Buffer;
SetRect (&pr[pData->rdh.nCount], x0, y, x, y+1);
if (x0 < pData->rdh.rcBound.left)
pData->rdh.rcBound.left = x0;
if (y < pData->rdh.rcBound.top)
pData->rdh.rcBound.top = y;
if (x > pData->rdh.rcBound.right)
pData->rdh.rcBound.right = x;
if (y+1 > pData->rdh.rcBound.bottom)
pData->rdh.rcBound.bottom = y+1;
pData->rdh.nCount++;
/* On Windows98, ExtCreateRegion() may fail if the
* number of rectangles is too large (ie: >
* 4000). Therefore, we have to create the region by
* multiple steps.
*/
if (pData->rdh.nCount == 2000)
{
HRGN h = ExtCreateRegion (NULL, sizeof(RGNDATAHEADER) + (sizeof(RECT) * maxRects), pData);
if (hRgn)
{
CombineRgn(hRgn, hRgn, h, RGN_OR);
DeleteObject(h);
}
else
hRgn = h;
pData->rdh.nCount = 0;
SetRect (&pData->rdh.rcBound, MAXLONG, MAXLONG, 0, 0);
}
}
}
}
/* Create or extend the region with the remaining rectangles*/
h = ExtCreateRegion (NULL, sizeof (RGNDATAHEADER)
+ (sizeof (RECT) * maxRects), pData);
if (hRgn)
{
CombineRgn (hRgn, hRgn, h, RGN_OR);
DeleteObject (h);
}
else
hRgn = h;
/* Clean up*/
g_free (pData);
return hRgn;
}
HRGN
_gdk_win32_gdkregion_to_hrgn (GdkRegion *region,
gint x_origin,
gint y_origin)
{
HRGN hrgn;
RGNDATA *rgndata;
RECT *rect;
GdkRegionBox *boxes = region->rects;
guint nbytes =
sizeof (RGNDATAHEADER) + (sizeof (RECT) * region->numRects);
int i;
rgndata = g_malloc (nbytes);
rgndata->rdh.dwSize = sizeof (RGNDATAHEADER);
rgndata->rdh.iType = RDH_RECTANGLES;
rgndata->rdh.nCount = rgndata->rdh.nRgnSize = 0;
SetRect (&rgndata->rdh.rcBound,
G_MAXLONG, G_MAXLONG, G_MINLONG, G_MINLONG);
for (i = 0; i < region->numRects; i++)
{
rect = ((RECT *) rgndata->Buffer) + rgndata->rdh.nCount++;
rect->left = boxes[i].x1 + x_origin;
rect->right = boxes[i].x2 + x_origin;
rect->top = boxes[i].y1 + y_origin;
rect->bottom = boxes[i].y2 + y_origin;
if (rect->left < rgndata->rdh.rcBound.left)
rgndata->rdh.rcBound.left = rect->left;
if (rect->right > rgndata->rdh.rcBound.right)
rgndata->rdh.rcBound.right = rect->right;
if (rect->top < rgndata->rdh.rcBound.top)
rgndata->rdh.rcBound.top = rect->top;
if (rect->bottom > rgndata->rdh.rcBound.bottom)
rgndata->rdh.rcBound.bottom = rect->bottom;
}
if ((hrgn = ExtCreateRegion (NULL, nbytes, rgndata)) == NULL)
WIN32_API_FAILED ("ExtCreateRegion");
g_free (rgndata);
return (hrgn);
}
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