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gtk/gdk/win32/gdkprivate-win32.h
Tor Lillqvist baad14eee0 Improve and simplify line segment rendering on Win32, especially the 
2005-06-23  Tor Lillqvist  <tml@novell.com>

	Improve and simplify line segment rendering on Win32, especially
	the implementation of GDK_CAP_NOT_LAST, and dashed lines. Fixes
	bug #306396.

	* gdk/win32/gdkprivate-win32.h (GdkGCWin32): Save the GdkGC's
	line_style, cap_style and join_style as such in the
	GdkGCWin32. Don't need to keep the pen_double_dash flag, we can
	check the line_style.

	* gdk/win32/gdkgc-win32.c (fixup_pen): New internal function. Sets
	up the GDI pen type, style, end cap and join attributes to use
	based on the pen width, GDK line style, end cap style, and join
	style.

	For a narrow (zero-width) GDK pen with the GDK_CAP_NOT_LAST end
	cap style, which typically are used for XOR drawing where it is
	essential that the last pixel is not drawn, use a GDI cosmetic
	pen. Only for a cosmetic pen does GDI not draw the last pixel. I
	deduced this by experimetation, the documentation is rather vague.

	For other GDK pens use a geometric GDI pen. If the width is 0 or 1
	and the GDK end cap style is GDK_CAP_BUTT, and the line style is
	GDK_LINE_SOLID, use PS_ENDCAP_ROUND. This ensures that also
	single-pixel length lines are drawn. (For sngle-pixel width lines
	roundness as such is of course irrelevant.) For dashed lines, use
	PS_ENDCAP_FLAT.

	For wide lines use PS_ENDCAP_FLAT, _ROUND or _SQUARE,
	respectively, for GDK_CAP_BUTT, GDK_CAP_ROUND and GDK_CAP_PROJECTING.

	For one pixel on-off dashed lines, use PS_ALTERNATE, it seems to
	work better than PS_USERSTYLE. For other dashed lines, use
	PS_USERSTYLE and the dashes as set by the user (or the default
	four-pixel on-off style).

	(gdk_win32_gc_values_to_win32values, gdk_win32_gc_set_dashes):
	Call fixup_pen() to do the pen settings after modifying some of
	the GDK GC attributes that affect pens.

	* gdk/win32/gdkdrawable-win32.c (render_line_horizontal,
	render_line_vertical, draw_segments): Check GdkGCWin32::line_style
	instead of the the removed pen_double_dash member. Don't use
	PATCOPY unconditionally in the PatBlt() call, use a raster ope
	code that depends on the GC function in use.

	(draw_rectangle, draw_segments, draw_lines): Be more careful in
	deciding when to do the manual dash rendering.

	(draw_segments): Don't do any manual "last point" drawing at
	all. The above changes takes care of narrow line segments being
	drawn correctly in most cases, at least on NT-based Windows.
2005-06-24 13:00:05 +00:00

535 lines
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/* GDK - The GIMP Drawing Kit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* 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/.
*/
#ifndef __GDK_PRIVATE_WIN32_H__
#define __GDK_PRIVATE_WIN32_H__
#include <gdk/gdkprivate.h>
#include <gdk/win32/gdkwindow-win32.h>
#include <gdk/win32/gdkpixmap-win32.h>
#include "gdkinternals.h"
#include <config.h>
/* Make up for some minor w32api header lossage */
/* PS_JOIN_MASK is missing */
#ifndef PS_JOIN_MASK
#define PS_JOIN_MASK (PS_JOIN_BEVEL|PS_JOIN_MITER|PS_JOIN_ROUND)
#endif
/* CLR_INVALID is missing */
#ifndef CLR_INVALID
#define CLR_INVALID CLR_NONE
#endif
/* Some charsets are missing from MSVC 5 headers */
#ifndef JOHAB_CHARSET
#define JOHAB_CHARSET 130
#endif
#ifndef VIETNAMESE_CHARSET
#define VIETNAMESE_CHARSET 163
#endif
#ifndef FS_VIETNAMESE
#define FS_VIETNAMESE 0x100
#endif
/* Some virtual keycodes are missing */
#ifndef VK_OEM_PLUS
#define VK_OEM_PLUS 0xBB
#endif
#ifndef VK_OEM_COMMA
#define VK_OEM_COMMA 0xBC
#endif
#ifndef VK_OEM_MINUS
#define VK_OEM_MINUS 0xBD
#endif
#ifndef VK_OEM_PERIOD
#define VK_OEM_PERIOD 0xBE
#endif
#ifndef VK_OEM_1
#define VK_OEM_1 0xBA
#endif
#ifndef VK_OEM_2
#define VK_OEM_2 0xBF
#endif
#ifndef VK_OEM_3
#define VK_OEM_3 0xC0
#endif
#ifndef VK_OEM_4
#define VK_OEM_4 0xDB
#endif
#ifndef VK_OEM_5
#define VK_OEM_5 0xDC
#endif
#ifndef VK_OEM_6
#define VK_OEM_6 0xDD
#endif
#ifndef VK_OEM_7
#define VK_OEM_7 0xDE
#endif
#ifndef VK_OEM_8
#define VK_OEM_8 0xDF
#endif
/* Missing messages */
#ifndef WM_SYNCPAINT
#define WM_SYNCPAINT 0x88
#endif
#ifndef WM_MOUSEWHEEL
#define WM_MOUSEWHEEL 0X20A
#endif
#ifndef WM_GETOBJECT
#define WM_GETOBJECT 0x3D
#endif
#ifndef WM_NCXBUTTONDOWN
#define WM_NCXBUTTONDOWN 0xAB
#endif
#ifndef WM_NCXBUTTONUP
#define WM_NCXBUTTONUP 0xAC
#endif
#ifndef WM_NCXBUTTONDBLCLK
#define WM_NCXBUTTONDBLCLK 0xAD
#endif
#ifndef WM_MENURBUTTONUP
#define WM_MENURBUTTONUP 0x122
#endif
#ifndef WM_MENUDRAG
#define WM_MENUDRAG 0x123
#endif
#ifndef WM_MENUGETOBJECT
#define WM_MENUGETOBJECT 0x124
#endif
#ifndef WM_UNINITMENUPOPUP
#define WM_UNINITMENUPOPUP 0x125
#endif
#ifndef WM_MENUCOMMAND
#define WM_MENUCOMMAND 0x126
#endif
#ifndef WM_CHANGEUISTATE
#define WM_CHANGEUISTATE 0x127
#endif
#ifndef WM_UPDATEUISTATE
#define WM_UPDATEUISTATE 0x128
#endif
#ifndef WM_QUERYUISTATE
#define WM_QUERYUISTATE 0x129
#endif
#ifndef WM_XBUTTONDOWN
#define WM_XBUTTONDOWN 0x20B
#endif
#ifndef WM_XBUTTONUP
#define WM_XBUTTONUP 0x20C
#endif
#ifndef WM_XBUTTONDBLCLK
#define WM_XBUTTONDBLCLK 0x20D
#endif
#ifndef WM_IME_REQUEST
#define WM_IME_REQUEST 0x288
#endif
#ifndef WM_MOUSEHOVER
#define WM_MOUSEHOVER 0x2A1
#endif
#ifndef WM_MOUSELEAVE
#define WM_MOUSELEAVE 0x2A3
#endif
#ifndef WM_NCMOUSEHOVER
#define WM_NCMOUSEHOVER 0x2A0
#endif
#ifndef WM_NCMOUSELEAVE
#define WM_NCMOUSELEAVE 0x2A2
#endif
#ifndef WM_APPCOMMAND
#define WM_APPCOMMAND 0x319
#endif
#ifndef WM_HANDHELDFIRST
#define WM_HANDHELDFIRST 0x358
#endif
#ifndef WM_HANDHELDLAST
#define WM_HANDHELDLAST 0x35F
#endif
#ifndef WM_AFXFIRST
#define WM_AFXFIRST 0x360
#endif
#ifndef WM_AFXLAST
#define WM_AFXLAST 0x37F
#endif
#ifndef CopyCursor
#define CopyCursor(pcur) ((HCURSOR)CopyIcon((HICON)(pcur)))
#endif
/* Define some combinations of GdkDebugFlags */
#define GDK_DEBUG_EVENTS_OR_COLORMAP (GDK_DEBUG_EVENTS|GDK_DEBUG_COLORMAP)
#define GDK_DEBUG_EVENTS_OR_INPUT (GDK_DEBUG_EVENTS|GDK_DEBUG_INPUT)
#define GDK_DEBUG_PIXMAP_OR_COLORMAP (GDK_DEBUG_PIXMAP|GDK_DEBUG_COLORMAP)
#define GDK_DEBUG_MISC_OR_COLORMAP (GDK_DEBUG_MISC|GDK_DEBUG_COLORMAP)
#define GDK_TYPE_GC_WIN32 (_gdk_gc_win32_get_type ())
#define GDK_GC_WIN32(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), GDK_TYPE_GC_WIN32, GdkGCWin32))
#define GDK_GC_WIN32_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GDK_TYPE_GC_WIN32, GdkGCWin32Class))
#define GDK_IS_GC_WIN32(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), GDK_TYPE_GC_WIN32))
#define GDK_IS_GC_WIN32_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GDK_TYPE_GC_WIN32))
#define GDK_GC_WIN32_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GDK_TYPE_GC_WIN32, GdkGCWin32Class))
typedef struct _GdkColormapPrivateWin32 GdkColormapPrivateWin32;
typedef struct _GdkCursorPrivate GdkCursorPrivate;
typedef struct _GdkWin32SingleFont GdkWin32SingleFont;
typedef struct _GdkFontPrivateWin32 GdkFontPrivateWin32;
typedef struct _GdkGCWin32 GdkGCWin32;
typedef struct _GdkGCWin32Class GdkGCWin32Class;
struct _GdkCursorPrivate
{
GdkCursor cursor;
HCURSOR hcursor;
};
struct _GdkWin32SingleFont
{
HFONT hfont;
UINT charset;
UINT codepage;
FONTSIGNATURE fs;
};
struct _GdkFontPrivateWin32
{
GdkFontPrivate base;
GSList *fonts; /* List of GdkWin32SingleFonts */
GSList *names;
};
struct _GdkVisualClass
{
GObjectClass parent_class;
};
typedef enum {
GDK_WIN32_PE_STATIC,
GDK_WIN32_PE_AVAILABLE,
GDK_WIN32_PE_INUSE
} GdkWin32PalEntryState;
struct _GdkColormapPrivateWin32
{
HPALETTE hpal;
gint current_size; /* Current size of hpal */
GdkWin32PalEntryState *use;
gint private_val;
GHashTable *hash;
GdkColorInfo *info;
};
struct _GdkGCWin32
{
GdkGC parent_instance;
/* A Windows Device Context (DC) is not equivalent to an X11
* GC. We can use a DC only in the window for which it was
* allocated, or (in the case of a memory DC) with the bitmap that
* has been selected into it. Thus, we have to release and
* reallocate a DC each time the GdkGC is used to paint into a new
* window or pixmap. We thus keep all the necessary values in the
* GdkGCWin32 object.
*/
HRGN hcliprgn;
GdkGCValuesMask values_mask;
GdkFont *font;
gint rop2;
GdkSubwindowMode subwindow_mode;
gint graphics_exposures;
gint pen_width;
DWORD pen_style;
GdkLineStyle line_style;
GdkCapStyle cap_style;
GdkJoinStyle join_style;
DWORD *pen_dashes; /* use for PS_USERSTYLE or step-by-step rendering */
gint pen_num_dashes;
gint pen_dash_offset;
HBRUSH pen_hbrbg;
/* Following fields are valid while the GC exists as a Windows DC */
HDC hdc;
int saved_dc;
HPALETTE holdpal;
};
struct _GdkGCWin32Class
{
GdkGCClass parent_class;
};
GType _gdk_gc_win32_get_type (void);
gulong _gdk_win32_get_next_tick (gulong suggested_tick);
void _gdk_window_init_position (GdkWindow *window);
void _gdk_window_move_resize_child (GdkWindow *window,
gint x,
gint y,
gint width,
gint height);
void _gdk_window_process_expose (GdkWindow *window,
GdkRegion *invalidate_region);
void _gdk_win32_selection_init (void);
void _gdk_win32_dnd_exit (void);
void gdk_win32_handle_table_insert (HANDLE *handle,
gpointer data);
void gdk_win32_handle_table_remove (HANDLE handle);
GdkGC *_gdk_win32_gc_new (GdkDrawable *drawable,
GdkGCValues *values,
GdkGCValuesMask values_mask);
GdkImage *_gdk_win32_get_image (GdkDrawable *drawable,
gint x,
gint y,
gint width,
gint height);
GdkImage *_gdk_win32_copy_to_image (GdkDrawable *drawable,
GdkImage *image,
gint src_x,
gint src_y,
gint dest_x,
gint dest_y,
gint width,
gint height);
void _gdk_win32_blit (gboolean use_fg_bg,
GdkDrawableImplWin32 *drawable,
GdkGC *gc,
GdkDrawable *src,
gint xsrc,
gint ysrc,
gint xdest,
gint ydest,
gint width,
gint height);
COLORREF _gdk_win32_colormap_color (GdkColormap *colormap,
gulong pixel);
HRGN _gdk_win32_bitmap_to_hrgn (GdkPixmap *bitmap);
HRGN _gdk_win32_gdkregion_to_hrgn (GdkRegion *region,
gint x_origin,
gint y_origin);
void _gdk_win32_adjust_client_rect (GdkWindow *window,
RECT *RECT);
void _gdk_win32_get_adjusted_client_rect (GdkWindow *window,
RECT *RECT);
void _gdk_selection_property_delete (GdkWindow *);
void _gdk_dropfiles_store (gchar *data);
void _gdk_wchar_text_handle (GdkFont *font,
const wchar_t *wcstr,
int wclen,
void (*handler)(GdkWin32SingleFont *,
const wchar_t *,
int,
void *),
void *arg);
#ifdef G_ENABLE_DEBUG
gchar *_gdk_win32_color_to_string (const GdkColor *color);
void _gdk_win32_print_paletteentries (const PALETTEENTRY *pep,
const int nentries);
void _gdk_win32_print_system_palette (void);
void _gdk_win32_print_hpalette (HPALETTE hpal);
void _gdk_win32_print_dc (HDC hdc);
gchar *_gdk_win32_cap_style_to_string (GdkCapStyle cap_style);
gchar *_gdk_win32_fill_style_to_string (GdkFill fill);
gchar *_gdk_win32_function_to_string (GdkFunction function);
gchar *_gdk_win32_join_style_to_string (GdkJoinStyle join_style);
gchar *_gdk_win32_line_style_to_string (GdkLineStyle line_style);
gchar *_gdk_win32_gcvalues_mask_to_string (GdkGCValuesMask mask);
gchar *_gdk_win32_window_state_to_string (GdkWindowState state);
gchar *_gdk_win32_drawable_description (GdkDrawable *d);
gchar *_gdk_win32_rop2_to_string (int rop2);
gchar *_gdk_win32_lbstyle_to_string (UINT brush_style);
gchar *_gdk_win32_pstype_to_string (DWORD pen_style);
gchar *_gdk_win32_psstyle_to_string (DWORD pen_style);
gchar *_gdk_win32_psendcap_to_string (DWORD pen_style);
gchar *_gdk_win32_psjoin_to_string (DWORD pen_style);
gchar *_gdk_win32_message_to_string (UINT msg);
gchar *_gdk_win32_key_to_string (LONG lParam);
gchar *_gdk_win32_cf_to_string (UINT format);
gchar *_gdk_win32_data_to_string (const guchar*data,
int nbytes);
gchar *_gdk_win32_rect_to_string (const RECT *rect);
gchar *_gdk_win32_gdkrectangle_to_string (const GdkRectangle *rect);
gchar *_gdk_win32_gdkregion_to_string (const GdkRegion *box);
#endif
gchar *_gdk_win32_last_error_string (void);
void _gdk_win32_api_failed (const gchar *where,
gint line,
const gchar *api);
void _gdk_other_api_failed (const gchar *where,
gint line,
const gchar *api);
void _gdk_win32_gdi_failed (const gchar *where,
gint line,
const gchar *api);
#if defined(__GNUC__) && (__GNUC__ < 3)
#define WIN32_API_FAILED(api) _gdk_win32_api_failed (__FILE__ ":" __PRETTY_FUNCTION__, __LINE__, api)
#define WIN32_GDI_FAILED(api) _gdk_win32_gdi_failed (__FILE__ ":" __PRETTY_FUNCTION__, __LINE__, api)
#define OTHER_API_FAILED(api) _gdk_other_api_failed (__FILE__ ":" __PRETTY_FUNCTION__, __LINE__, api)
#else
#define WIN32_API_FAILED(api) _gdk_win32_api_failed (__FILE__, __LINE__, api)
#define WIN32_GDI_FAILED(api) _gdk_win32_gdi_failed (__FILE__, __LINE__, api)
#define OTHER_API_FAILED(api) _gdk_other_api_failed (__FILE__, __LINE__, api)
#endif
/* These two macros call a GDI or other Win32 API and if the return
* value is zero or NULL, print a warning message. The majority of GDI
* calls return zero or NULL on failure. The value of the macros is nonzero
* if the call succeeded, zero otherwise.
*/
#define GDI_CALL(api, arglist) (api arglist ? 1 : (WIN32_GDI_FAILED (#api), 0))
#define API_CALL(api, arglist) (api arglist ? 1 : (WIN32_API_FAILED (#api), 0))
extern LRESULT CALLBACK _gdk_win32_window_procedure (HWND, UINT, WPARAM, LPARAM);
extern GdkWindow *_gdk_root;
extern GdkDisplay *_gdk_display;
extern GdkScreen *_gdk_screen;
extern gint _gdk_num_monitors;
extern GdkRectangle *_gdk_monitors;
/* Offsets to add to Windows coordinates (which are relative to the
* primary monitor's origin, and thus might be negative for monitors
* to the left and/or above the primary monitor) to get GDK
* coordinates, which should be non-negative on the whole screen.
*/
extern gint _gdk_offset_x, _gdk_offset_y;
extern HDC _gdk_display_hdc;
extern HINSTANCE _gdk_dll_hinstance;
extern HINSTANCE _gdk_app_hmodule;
/* These are thread specific, but GDK/win32 works OK only when invoked
* from a single thread anyway.
*/
extern HKL _gdk_input_locale;
extern gboolean _gdk_input_locale_is_ime;
extern UINT _gdk_input_codepage;
extern guint _gdk_keymap_serial;
extern gboolean _gdk_keyboard_has_altgr;
extern guint _scancode_rshift;
/* Registered clipboard formats */
extern WORD _cf_rtf;
extern WORD _cf_utf8_string;
/* GdkAtoms: targets */
extern GdkAtom _utf8_string;
extern GdkAtom _targets;
extern GdkAtom _text_uri_list;
extern GdkAtom _image_bmp;
/* DND selections */
extern GdkAtom _local_dnd;
extern GdkAtom _gdk_win32_dropfiles;
extern GdkAtom _gdk_ole2_dnd;
extern GdkAtom _gdk_selection_property;
extern GdkAtom _wm_transient_for;
/* Options */
extern gboolean _gdk_input_ignore_wintab;
extern gint _gdk_max_colors;
#define GDK_WIN32_COLORMAP_DATA(cmap) ((GdkColormapPrivateWin32 *) GDK_COLORMAP (cmap)->windowing_data)
/* TRUE while a user-initiated window move or resize operation is in progress */
extern gboolean _sizemove_in_progress;
/* TRUE when we are emptying the clipboard ourselves */
extern gboolean _ignore_destroy_clipboard;
/* Mapping from registered clipboard format id (native) to
* corresponding GdkAtom
*/
extern GHashTable *_format_atom_table;
/* Hold the result of a delayed rendering */
extern HGLOBAL _delayed_rendering_data;
HGLOBAL _gdk_win32_selection_convert_to_dib (HGLOBAL hdata,
GdkAtom target);
/* Convert a pixbuf to an HICON (or HCURSOR). Supports alpha under
* Windows XP, thresholds alpha otherwise.
*/
HICON _gdk_win32_pixbuf_to_hicon (GdkPixbuf *pixbuf);
HICON _gdk_win32_pixbuf_to_hcursor (GdkPixbuf *pixbuf,
gint x_hotspot,
gint y_hotspot);
gboolean _gdk_win32_pixbuf_to_hicon_supports_alpha (void);
/* Initialization */
void _gdk_windowing_window_init (void);
void _gdk_root_window_size_init (void);
void _gdk_monitor_init(void);
void _gdk_visual_init (void);
void _gdk_dnd_init (void);
void _gdk_windowing_image_init (void);
void _gdk_events_init (void);
void _gdk_input_init (GdkDisplay *display);
#endif /* __GDK_PRIVATE_WIN32_H__ */
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