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gtk/gdk/win32/gdkdrawable-win32.c
Kristian Rietveld d819bc4814 Invalidate cairo surface if resizing is not supported for target 
While X11 surfaces can be resized, this is not the case for Quartz
surfaces.  Instead of resizing we will invalidate the surface instead.
By giving _gdk_windowing_set_cairo_surface_size() a boolean return
value, we can signal back whether or not resizing was possible.  If not
possible, we invalidate the surface.
2010-08-10 21:02:31 +02:00

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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) 2001-2005 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/.
*/
#include "config.h"
#include <math.h>
#include <stdio.h>
#include <glib.h>
#include <pango/pangowin32.h>
#include <cairo-win32.h>
#include "gdkscreen.h" /* gdk_screen_get_default() */
#include "gdkprivate-win32.h"
#define ROP3_D 0x00AA0029
#define ROP3_DSna 0x00220326
#define ROP3_DSPDxax 0x00E20746
#define LINE_ATTRIBUTES (GDK_GC_LINE_WIDTH|GDK_GC_LINE_STYLE| \
GDK_GC_CAP_STYLE|GDK_GC_JOIN_STYLE)
#define MUST_RENDER_DASHES_MANUALLY(gcwin32) \
(gcwin32->line_style == GDK_LINE_DOUBLE_DASH || \
(gcwin32->line_style == GDK_LINE_ON_OFF_DASH && gcwin32->pen_dash_offset))
static cairo_surface_t *gdk_win32_ref_cairo_surface (GdkDrawable *drawable);
static void gdk_win32_set_colormap (GdkDrawable *drawable,
GdkColormap *colormap);
static GdkColormap* gdk_win32_get_colormap (GdkDrawable *drawable);
static gint gdk_win32_get_depth (GdkDrawable *drawable);
static GdkScreen * gdk_win32_get_screen (GdkDrawable *drawable);
static GdkVisual* gdk_win32_get_visual (GdkDrawable *drawable);
static void gdk_drawable_impl_win32_finalize (GObject *object);
static const cairo_user_data_key_t gdk_win32_cairo_key;
G_DEFINE_TYPE (GdkDrawableImplWin32, _gdk_drawable_impl_win32, GDK_TYPE_DRAWABLE)
static void
_gdk_drawable_impl_win32_class_init (GdkDrawableImplWin32Class *klass)
{
GdkDrawableClass *drawable_class = GDK_DRAWABLE_CLASS (klass);
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->finalize = gdk_drawable_impl_win32_finalize;
drawable_class->create_gc = _gdk_win32_gc_new;
drawable_class->ref_cairo_surface = gdk_win32_ref_cairo_surface;
drawable_class->set_colormap = gdk_win32_set_colormap;
drawable_class->get_colormap = gdk_win32_get_colormap;
drawable_class->get_depth = gdk_win32_get_depth;
drawable_class->get_screen = gdk_win32_get_screen;
drawable_class->get_visual = gdk_win32_get_visual;
}
static void
_gdk_drawable_impl_win32_init (GdkDrawableImplWin32 *impl)
{
}
static void
gdk_drawable_impl_win32_finalize (GObject *object)
{
gdk_drawable_set_colormap (GDK_DRAWABLE (object), NULL);
G_OBJECT_CLASS (_gdk_drawable_impl_win32_parent_class)->finalize (object);
}
/*****************************************************
* Win32 specific implementations of generic functions *
*****************************************************/
static GdkColormap*
gdk_win32_get_colormap (GdkDrawable *drawable)
{
return GDK_DRAWABLE_IMPL_WIN32 (drawable)->colormap;
}
static void
gdk_win32_set_colormap (GdkDrawable *drawable,
GdkColormap *colormap)
{
GdkDrawableImplWin32 *impl = GDK_DRAWABLE_IMPL_WIN32 (drawable);
if (impl->colormap == colormap)
return;
if (impl->colormap)
g_object_unref (impl->colormap);
impl->colormap = colormap;
if (impl->colormap)
g_object_ref (impl->colormap);
}
/* Drawing
*/
static int
rop2_to_rop3 (int rop2)
{
switch (rop2)
{
/* Oh, Microsoft's silly names for binary and ternary rops. */
#define CASE(rop2,rop3) case R2_##rop2: return rop3
CASE (BLACK, BLACKNESS);
CASE (NOTMERGEPEN, NOTSRCERASE);
CASE (MASKNOTPEN, 0x00220326);
CASE (NOTCOPYPEN, NOTSRCCOPY);
CASE (MASKPENNOT, SRCERASE);
CASE (NOT, DSTINVERT);
CASE (XORPEN, SRCINVERT);
CASE (NOTMASKPEN, 0x007700E6);
CASE (MASKPEN, SRCAND);
CASE (NOTXORPEN, 0x00990066);
CASE (NOP, 0x00AA0029);
CASE (MERGENOTPEN, MERGEPAINT);
CASE (COPYPEN, SRCCOPY);
CASE (MERGEPENNOT, 0x00DD0228);
CASE (MERGEPEN, SRCPAINT);
CASE (WHITE, WHITENESS);
#undef CASE
default: return SRCCOPY;
}
}
static int
rop2_to_patblt_rop (int rop2)
{
switch (rop2)
{
#define CASE(rop2,patblt_rop) case R2_##rop2: return patblt_rop
CASE (COPYPEN, PATCOPY);
CASE (XORPEN, PATINVERT);
CASE (NOT, DSTINVERT);
CASE (BLACK, BLACKNESS);
CASE (WHITE, WHITENESS);
#undef CASE
default:
g_warning ("Unhandled rop2 in GC to be used in PatBlt: %#x", rop2);
return PATCOPY;
}
}
static inline int
align_with_dash_offset (int a, DWORD *dashes, int num_dashes, GdkGCWin32 *gcwin32)
{
int n = 0;
int len_sum = 0;
/*
* We can't simply add the dashoffset, it can be an arbitrary larger
* or smaller value not even between x1 and x2. It just says use the
* dash pattern aligned to the offset. So ensure x1 is smaller _x1
* and we start with the appropriate dash.
*/
for (n = 0; n < num_dashes; n++)
len_sum += dashes[n];
if ( len_sum > 0 /* pathological api usage? */
&& gcwin32->pen_dash_offset > a)
a -= (((gcwin32->pen_dash_offset/len_sum - a/len_sum) + 1) * len_sum);
else
a = gcwin32->pen_dash_offset;
return a;
}
/* Render a dashed line 'by hand'. Used for all dashes on Win9x (where
* GDI is way too limited), and for double dashes on all Windowses.
*/
static inline gboolean
render_line_horizontal (GdkGCWin32 *gcwin32,
int x1,
int x2,
int y)
{
int n = 0;
const int pen_width = MAX (gcwin32->pen_width, 1);
const int _x1 = x1;
g_assert (gcwin32->pen_dashes);
x1 = align_with_dash_offset (x1, gcwin32->pen_dashes, gcwin32->pen_num_dashes, gcwin32);
for (n = 0; x1 < x2; n++)
{
int len = gcwin32->pen_dashes[n % gcwin32->pen_num_dashes];
if (x1 + len > x2)
len = x2 - x1;
if (n % 2 == 0 && x1 + len > _x1)
if (!GDI_CALL (PatBlt, (gcwin32->hdc,
x1 < _x1 ? _x1 : x1,
y - pen_width / 2,
len, pen_width,
rop2_to_patblt_rop (gcwin32->rop2))))
return FALSE;
x1 += gcwin32->pen_dashes[n % gcwin32->pen_num_dashes];
}
if (gcwin32->line_style == GDK_LINE_DOUBLE_DASH)
{
HBRUSH hbr;
if ((hbr = SelectObject (gcwin32->hdc, gcwin32->pen_hbrbg)) == HGDI_ERROR)
return FALSE;
x1 = _x1;
x1 += gcwin32->pen_dash_offset;
for (n = 0; x1 < x2; n++)
{
int len = gcwin32->pen_dashes[n % gcwin32->pen_num_dashes];
if (x1 + len > x2)
len = x2 - x1;
if (n % 2)
if (!GDI_CALL (PatBlt, (gcwin32->hdc, x1, y - pen_width / 2,
len, pen_width,
rop2_to_patblt_rop (gcwin32->rop2))))
return FALSE;
x1 += gcwin32->pen_dashes[n % gcwin32->pen_num_dashes];
}
if (SelectObject (gcwin32->hdc, hbr) == HGDI_ERROR)
return FALSE;
}
return TRUE;
}
static inline gboolean
render_line_vertical (GdkGCWin32 *gcwin32,
int x,
int y1,
int y2)
{
int n;
const int pen_width = MAX (gcwin32->pen_width, 1);
const int _y1 = y1;
g_assert (gcwin32->pen_dashes);
y1 = align_with_dash_offset (y1, gcwin32->pen_dashes, gcwin32->pen_num_dashes, gcwin32);
for (n = 0; y1 < y2; n++)
{
int len = gcwin32->pen_dashes[n % gcwin32->pen_num_dashes];
if (y1 + len > y2)
len = y2 - y1;
if (n % 2 == 0 && y1 + len > _y1)
if (!GDI_CALL (PatBlt, (gcwin32->hdc, x - pen_width / 2,
y1 < _y1 ? _y1 : y1,
pen_width, len,
rop2_to_patblt_rop (gcwin32->rop2))))
return FALSE;
y1 += gcwin32->pen_dashes[n % gcwin32->pen_num_dashes];
}
if (gcwin32->line_style == GDK_LINE_DOUBLE_DASH)
{
HBRUSH hbr;
if ((hbr = SelectObject (gcwin32->hdc, gcwin32->pen_hbrbg)) == HGDI_ERROR)
return FALSE;
y1 = _y1;
y1 += gcwin32->pen_dash_offset;
for (n = 0; y1 < y2; n++)
{
int len = gcwin32->pen_dashes[n % gcwin32->pen_num_dashes];
if (y1 + len > y2)
len = y2 - y1;
if (n % 2)
if (!GDI_CALL (PatBlt, (gcwin32->hdc, x - pen_width / 2, y1,
pen_width, len,
rop2_to_patblt_rop (gcwin32->rop2))))
return FALSE;
y1 += gcwin32->pen_dashes[n % gcwin32->pen_num_dashes];
}
if (SelectObject (gcwin32->hdc, hbr) == HGDI_ERROR)
return FALSE;
}
return TRUE;
}
static cairo_region_t *
widen_bounds (GdkRectangle *bounds,
gint pen_width)
{
if (pen_width == 0)
pen_width = 1;
bounds->x -= pen_width;
bounds->y -= pen_width;
bounds->width += 2 * pen_width;
bounds->height += 2 * pen_width;
return cairo_region_create_rectangle (bounds);
}
static void
blit_from_pixmap (gboolean use_fg_bg,
GdkDrawableImplWin32 *dest,
HDC hdc,
GdkPixmapImplWin32 *src,
GdkGC *gc,
gint xsrc,
gint ysrc,
gint xdest,
gint ydest,
gint width,
gint height)
{
GdkGCWin32 *gcwin32 = GDK_GC_WIN32 (gc);
HDC srcdc;
HBITMAP holdbitmap;
RGBQUAD oldtable[256], newtable[256];
COLORREF bg, fg;
gint newtable_size = 0, oldtable_size = 0;
gboolean ok = TRUE;
GDK_NOTE (DRAW, g_print ("blit_from_pixmap\n"));
srcdc = _gdk_win32_drawable_acquire_dc (GDK_DRAWABLE (src));
if (!srcdc)
return;
if (!(holdbitmap = SelectObject (srcdc, ((GdkDrawableImplWin32 *) src)->handle)))
WIN32_GDI_FAILED ("SelectObject");
else
{
if (GDK_PIXMAP_OBJECT (src->parent_instance.wrapper)->depth <= 8)
{
/* Blitting from a 1, 4 or 8-bit pixmap */
if ((oldtable_size = GetDIBColorTable (srcdc, 0, 256, oldtable)) == 0)
WIN32_GDI_FAILED ("GetDIBColorTable");
else if (GDK_PIXMAP_OBJECT (src->parent_instance.wrapper)->depth == 1)
{
/* Blitting from an 1-bit pixmap */
gint bgix, fgix;
if (use_fg_bg)
{
bgix = _gdk_gc_get_bg_pixel (gc);
fgix = _gdk_gc_get_fg_pixel (gc);
}
else
{
bgix = 0;
fgix = 1;
}
if (GDK_IS_PIXMAP_IMPL_WIN32 (dest) &&
GDK_PIXMAP_OBJECT (dest->wrapper)->depth <= 8)
{
/* Destination is also pixmap, get fg and bg from
* its palette. Either use the foreground and
* background pixel values in the GC, or 0
* and 1 to index the palette.
*/
if (!GDI_CALL (GetDIBColorTable, (hdc, bgix, 1, newtable)) ||
!GDI_CALL (GetDIBColorTable, (hdc, fgix, 1, newtable+1)))
ok = FALSE;
}
else
{
/* Destination is a window, get fg and bg from its
* colormap
*/
bg = _gdk_win32_colormap_color (dest->colormap, bgix);
fg = _gdk_win32_colormap_color (dest->colormap, fgix);
newtable[0].rgbBlue = GetBValue (bg);
newtable[0].rgbGreen = GetGValue (bg);
newtable[0].rgbRed = GetRValue (bg);
newtable[0].rgbReserved = 0;
newtable[1].rgbBlue = GetBValue (fg);
newtable[1].rgbGreen = GetGValue (fg);
newtable[1].rgbRed = GetRValue (fg);
newtable[1].rgbReserved = 0;
}
if (ok)
GDK_NOTE (DRAW, g_print ("bg: %02x %02x %02x "
"fg: %02x %02x %02x\n",
newtable[0].rgbRed,
newtable[0].rgbGreen,
newtable[0].rgbBlue,
newtable[1].rgbRed,
newtable[1].rgbGreen,
newtable[1].rgbBlue));
newtable_size = 2;
}
else if (GDK_IS_PIXMAP_IMPL_WIN32 (dest))
{
/* Destination is pixmap, get its color table */
if ((newtable_size = GetDIBColorTable (hdc, 0, 256, newtable)) == 0)
WIN32_GDI_FAILED ("GetDIBColorTable"), ok = FALSE;
}
/* If blitting between pixmaps, set source's color table */
if (ok && newtable_size > 0)
{
GDK_NOTE (MISC_OR_COLORMAP,
g_print ("blit_from_pixmap: set color table"
" hdc=%p count=%d\n",
srcdc, newtable_size));
if (!GDI_CALL (SetDIBColorTable, (srcdc, 0, newtable_size, newtable)))
ok = FALSE;
}
}
if (ok)
if (!BitBlt (hdc, xdest, ydest, width, height,
srcdc, xsrc, ysrc, rop2_to_rop3 (gcwin32->rop2)) &&
GetLastError () != ERROR_INVALID_HANDLE)
WIN32_GDI_FAILED ("BitBlt");
/* Restore source's color table if necessary */
if (ok && newtable_size > 0 && oldtable_size > 0)
{
GDK_NOTE (MISC_OR_COLORMAP,
g_print ("blit_from_pixmap: reset color table"
" hdc=%p count=%d\n",
srcdc, oldtable_size));
GDI_CALL (SetDIBColorTable, (srcdc, 0, oldtable_size, oldtable));
}
GDI_CALL (SelectObject, (srcdc, holdbitmap));
}
_gdk_win32_drawable_release_dc (GDK_DRAWABLE (src));
}
static void
blit_inside_drawable (HDC hdc,
GdkGCWin32 *gcwin32,
gint xsrc,
gint ysrc,
gint xdest,
gint ydest,
gint width,
gint height)
{
GDK_NOTE (DRAW, g_print ("blit_inside_drawable\n"));
GDI_CALL (BitBlt, (hdc, xdest, ydest, width, height,
hdc, xsrc, ysrc, rop2_to_rop3 (gcwin32->rop2)));
}
static void
blit_from_window (HDC hdc,
GdkGCWin32 *gcwin32,
GdkDrawableImplWin32 *src,
gint xsrc,
gint ysrc,
gint xdest,
gint ydest,
gint width,
gint height)
{
HDC srcdc;
HPALETTE holdpal = NULL;
GdkColormap *cmap = gdk_colormap_get_system ();
GDK_NOTE (DRAW, g_print ("blit_from_window\n"));
if ((srcdc = GetDC (src->handle)) == NULL)
{
WIN32_GDI_FAILED ("GetDC");
return;
}
if (cmap->visual->type == GDK_VISUAL_PSEUDO_COLOR ||
cmap->visual->type == GDK_VISUAL_STATIC_COLOR)
{
gint k;
if (!(holdpal = SelectPalette (srcdc, GDK_WIN32_COLORMAP_DATA (cmap)->hpal, FALSE)))
WIN32_GDI_FAILED ("SelectPalette");
else if ((k = RealizePalette (srcdc)) == GDI_ERROR)
WIN32_GDI_FAILED ("RealizePalette");
else if (k > 0)
GDK_NOTE (MISC_OR_COLORMAP,
g_print ("blit_from_window: realized %d\n", k));
}
GDI_CALL (BitBlt, (hdc, xdest, ydest, width, height,
srcdc, xsrc, ysrc, rop2_to_rop3 (gcwin32->rop2)));
if (holdpal != NULL)
GDI_CALL (SelectPalette, (srcdc, holdpal, FALSE));
GDI_CALL (ReleaseDC, (src->handle, srcdc));
}
/**
* _gdk_win32_drawable_acquire_dc
* @drawable: a Win32 #GdkDrawable implementation
*
* Gets a DC with the given drawable selected into
* it.
*
* Return value: The DC, on success. Otherwise
* %NULL. If this function succeeded
* _gdk_win32_drawable_release_dc() must be called
* release the DC when you are done using it.
**/
HDC
_gdk_win32_drawable_acquire_dc (GdkDrawable *drawable)
{
GdkDrawableImplWin32 *impl = GDK_DRAWABLE_IMPL_WIN32 (drawable);
if (GDK_IS_WINDOW_IMPL_WIN32 (drawable) &&
GDK_WINDOW_DESTROYED (impl->wrapper))
return NULL;
if (!impl->hdc)
{
if (GDK_IS_PIXMAP_IMPL_WIN32 (impl))
{
impl->hdc = CreateCompatibleDC (NULL);
if (!impl->hdc)
WIN32_GDI_FAILED ("CreateCompatibleDC");
if (impl->hdc)
{
impl->saved_dc_bitmap = SelectObject (impl->hdc,
impl->handle);
if (!impl->saved_dc_bitmap)
{
WIN32_GDI_FAILED ("CreateCompatibleDC");
DeleteDC (impl->hdc);
impl->hdc = NULL;
}
}
}
else
{
impl->hdc = GetDC (impl->handle);
if (!impl->hdc)
WIN32_GDI_FAILED ("GetDC");
}
}
if (impl->hdc)
{
impl->hdc_count++;
return impl->hdc;
}
else
{
return NULL;
}
}
/**
* _gdk_win32_drawable_release_dc
* @drawable: a Win32 #GdkDrawable implementation
*
* Releases the reference count for the DC
* from _gdk_win32_drawable_acquire_dc()
**/
void
_gdk_win32_drawable_release_dc (GdkDrawable *drawable)
{
GdkDrawableImplWin32 *impl = GDK_DRAWABLE_IMPL_WIN32 (drawable);
g_return_if_fail (impl->hdc_count > 0);
impl->hdc_count--;
if (impl->hdc_count == 0)
{
if (impl->saved_dc_bitmap)
{
GDI_CALL (SelectObject, (impl->hdc, impl->saved_dc_bitmap));
impl->saved_dc_bitmap = NULL;
}
if (impl->hdc)
{
if (GDK_IS_PIXMAP_IMPL_WIN32 (impl))
GDI_CALL (DeleteDC, (impl->hdc));
else
GDI_CALL (ReleaseDC, (impl->handle, impl->hdc));
impl->hdc = NULL;
}
}
}
cairo_surface_t *
_gdk_windowing_create_cairo_surface (GdkDrawable *drawable,
gint width,
gint height)
{
/* width and height are determined from the DC */
return gdk_win32_ref_cairo_surface (drawable);
}
static void
gdk_win32_cairo_surface_destroy (void *data)
{
GdkDrawableImplWin32 *impl = data;
_gdk_win32_drawable_release_dc (GDK_DRAWABLE (impl));
impl->cairo_surface = NULL;
}
static cairo_surface_t *
gdk_win32_ref_cairo_surface (GdkDrawable *drawable)
{
GdkDrawableImplWin32 *impl = GDK_DRAWABLE_IMPL_WIN32 (drawable);
if (GDK_IS_WINDOW_IMPL_WIN32 (drawable) &&
GDK_WINDOW_DESTROYED (impl->wrapper))
return NULL;
if (!impl->cairo_surface)
{
HDC hdc = _gdk_win32_drawable_acquire_dc (drawable);
if (!hdc)
return NULL;
impl->cairo_surface = cairo_win32_surface_create (hdc);
cairo_surface_set_user_data (impl->cairo_surface, &gdk_win32_cairo_key,
drawable, gdk_win32_cairo_surface_destroy);
}
else
cairo_surface_reference (impl->cairo_surface);
return impl->cairo_surface;
}
gboolean
_gdk_windowing_set_cairo_surface_size (cairo_surface_t *surface,
gint width,
gint height)
{
// Do nothing. The surface size is determined by the DC
return FALSE;
}
static gint
gdk_win32_get_depth (GdkDrawable *drawable)
{
/* This is a bit bogus but I'm not sure the other way is better */
return gdk_drawable_get_depth (GDK_DRAWABLE_IMPL_WIN32 (drawable)->wrapper);
}
static GdkScreen*
gdk_win32_get_screen (GdkDrawable *drawable)
{
return gdk_screen_get_default ();
}
static GdkVisual*
gdk_win32_get_visual (GdkDrawable *drawable)
{
return gdk_drawable_get_visual (GDK_DRAWABLE_IMPL_WIN32 (drawable)->wrapper);
}
HGDIOBJ
gdk_win32_drawable_get_handle (GdkDrawable *drawable)
{
return GDK_DRAWABLE_HANDLE (drawable);
}
/**
* _gdk_win32_drawable_finish
* @drawable: a Win32 #GdkDrawable implementation
*
* Releases any resources allocated internally for the drawable.
* This is called when the drawable becomes unusable
* (gdk_window_destroy() for a window, or the refcount going to
* zero for a pixmap.)
**/
void
_gdk_win32_drawable_finish (GdkDrawable *drawable)
{
GdkDrawableImplWin32 *impl = GDK_DRAWABLE_IMPL_WIN32 (drawable);
if (impl->cairo_surface)
{
cairo_surface_finish (impl->cairo_surface);
cairo_surface_set_user_data (impl->cairo_surface, &gdk_win32_cairo_key, NULL, NULL);
}
g_assert (impl->hdc_count == 0);
}
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