w32term.c 185 KB
Newer Older
1
/* Implementation of GUI terminal on the Microsoft Windows API.
Glenn Morris's avatar
Glenn Morris committed
2

3
Copyright (C) 1989, 1993-2012 Free Software Foundation, Inc.
Geoff Voelker's avatar
Geoff Voelker committed
4 5 6

This file is part of GNU Emacs.

7
GNU Emacs is free software: you can redistribute it and/or modify
Geoff Voelker's avatar
Geoff Voelker committed
8
it under the terms of the GNU General Public License as published by
9 10
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Geoff Voelker's avatar
Geoff Voelker committed
11 12 13 14 15 16 17

GNU Emacs 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
18
along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
Geoff Voelker's avatar
Geoff Voelker committed
19 20

#include <config.h>
21
#include <signal.h>
Geoff Voelker's avatar
Geoff Voelker committed
22 23 24
#include <stdio.h>
#include "lisp.h"
#include "blockinput.h"
25
#include "w32term.h"
Geoff Voelker's avatar
Geoff Voelker committed
26 27 28 29 30 31 32

#include "systty.h"
#include "systime.h"

#include <ctype.h>
#include <errno.h>
#include <sys/stat.h>
33
#include <imm.h>
Geoff Voelker's avatar
Geoff Voelker committed
34

35 36 37 38
#include "charset.h"
#include "character.h"
#include "coding.h"
#include "ccl.h"
Geoff Voelker's avatar
Geoff Voelker committed
39 40
#include "frame.h"
#include "dispextern.h"
41
#include "fontset.h"
Geoff Voelker's avatar
Geoff Voelker committed
42 43 44 45 46 47
#include "termhooks.h"
#include "termopts.h"
#include "termchar.h"
#include "disptab.h"
#include "buffer.h"
#include "window.h"
48
#include "keyboard.h"
Geoff Voelker's avatar
Geoff Voelker committed
49
#include "intervals.h"
50 51 52 53
#include "process.h"
#include "atimer.h"
#include "keymap.h"

Daniel Colascione's avatar
Daniel Colascione committed
54
#ifdef WINDOWSNT
55
#include "w32heap.h"
Daniel Colascione's avatar
Daniel Colascione committed
56 57 58 59 60 61
#endif

#ifndef WINDOWSNT
#include <io.h> /* for get_osfhandle */
#endif

62
#include <shellapi.h>
Geoff Voelker's avatar
Geoff Voelker committed
63

Jason Rumney's avatar
Jason Rumney committed
64
#include "font.h"
65
#include "w32font.h"
66

Kim F. Storm's avatar
Kim F. Storm committed
67
/* Fringe bitmaps.  */
68

69 70
static int max_fringe_bmp = 0;
static HBITMAP *fringe_bmp = 0;
71

72
/* Temporary variables for w32_read_socket.  */
73

74 75
static int last_mousemove_x = 0;
static int last_mousemove_y = 0;
76

77 78 79 80 81
/* Define GET_WHEEL_DELTA_WPARAM macro if system headers don't.  */
#ifndef GET_WHEEL_DELTA_WPARAM
#define GET_WHEEL_DELTA_WPARAM(wparam) ((short)HIWORD (wparam))
#endif

82 83 84 85 86
/* Non-zero means that a HELP_EVENT has been generated since Emacs
   start.  */

static int any_help_event_p;

87 88 89
/* Last window where we saw the mouse.  Used by mouse-autoselect-window.  */
static Lisp_Object last_window;

Geoff Voelker's avatar
Geoff Voelker committed
90 91
extern unsigned int msh_mousewheel;

92
extern void free_frame_menubar (struct frame *);
Geoff Voelker's avatar
Geoff Voelker committed
93

94
extern int w32_codepage_for_font (char *fontname);
95
extern Cursor w32_load_cursor (LPCTSTR name);
96

Geoff Voelker's avatar
Geoff Voelker committed
97 98 99 100
#define x_any_window_to_frame x_window_to_frame
#define x_top_window_to_frame x_window_to_frame


101 102
/* This is display since w32 does not support multiple ones.  */
struct w32_display_info one_w32_display_info;
Andrew Innes's avatar
Andrew Innes committed
103
struct w32_display_info *x_display_list;
Geoff Voelker's avatar
Geoff Voelker committed
104 105

/* This is a list of cons cells, each of the form (NAME . FONT-LIST-CACHE),
106
   one for each element of w32_display_list and in the same order.
Geoff Voelker's avatar
Geoff Voelker committed
107 108
   NAME is the name of the frame.
   FONT-LIST-CACHE records previous values returned by x-list-fonts.  */
109
Lisp_Object w32_display_name_list;
Geoff Voelker's avatar
Geoff Voelker committed
110

111

112
#if _WIN32_WINNT < 0x0500
113 114 115 116 117 118 119 120 121
/* Pre Windows 2000, this was not available, but define it here so
   that Emacs compiled on such a platform will run on newer versions.  */

typedef struct tagWCRANGE
{
  WCHAR wcLow;
  USHORT cGlyphs;
} WCRANGE;

Juanma Barranquero's avatar
Juanma Barranquero committed
122
typedef struct tagGLYPHSET
123 124 125 126 127 128
{
  DWORD cbThis;
  DWORD flAccel;
  DWORD cGlyphsSupported;
  DWORD cRanges;
  WCRANGE ranges[1];
Juanma Barranquero's avatar
Juanma Barranquero committed
129
} GLYPHSET;
130

Daniel Colascione's avatar
Daniel Colascione committed
131
#endif /* compiling for pre-Win2k */
132

133
/* Dynamic linking to SetLayeredWindowAttribute (only since 2000).  */
134
BOOL (WINAPI *pfnSetLayeredWindowAttributes) (HWND, COLORREF, BYTE, DWORD);
135 136 137 138

#ifndef LWA_ALPHA
#define LWA_ALPHA 0x02
#endif
139 140 141 142 143
/* WS_EX_LAYERED is defined unconditionally by MingW, but only for W2K and
   later targets by MSVC headers.  */
#ifndef WS_EX_LAYERED
#define WS_EX_LAYERED 0x80000
#endif
144

Geoff Voelker's avatar
Geoff Voelker committed
145 146 147
/* This is a frame waiting to be autoraised, within w32_read_socket.  */
struct frame *pending_autoraise_frame;

148 149 150 151 152
/* The handle of the frame that currently owns the system caret.  */
HWND w32_system_caret_hwnd;
int w32_system_caret_height;
int w32_system_caret_x;
int w32_system_caret_y;
153 154
DWORD dwWindowsThreadId = 0;
HANDLE hWindowsThread = NULL;
Geoff Voelker's avatar
Geoff Voelker committed
155 156 157
DWORD dwMainThreadId = 0;
HANDLE hMainThread = NULL;

158 159 160 161 162 163
int vertical_scroll_bar_min_handle;
int vertical_scroll_bar_top_border;
int vertical_scroll_bar_bottom_border;

int last_scroll_bar_drag_pos;

164 165 166
/* Keyboard code page - may be changed by language-change events.  */
int w32_keyboard_codepage;

Geoff Voelker's avatar
Geoff Voelker committed
167 168 169 170
/* Mouse movement. */

/* Where the mouse was last time we reported a mouse event.  */
static RECT last_mouse_glyph;
171
static FRAME_PTR last_mouse_glyph_frame;
Geoff Voelker's avatar
Geoff Voelker committed
172 173 174 175

/* The scroll bar in which the last motion event occurred.

   If the last motion event occurred in a scroll bar, we set this
176
   so w32_mouse_position can know whether to report a scroll bar motion or
Geoff Voelker's avatar
Geoff Voelker committed
177 178 179
   an ordinary motion.

   If the last motion event didn't occur in a scroll bar, we set this
180
   to Qnil, to tell w32_mouse_position to return an ordinary motion event.  */
181 182
static Lisp_Object last_mouse_scroll_bar;
static int last_mouse_scroll_bar_pos;
Geoff Voelker's avatar
Geoff Voelker committed
183

184
/* This is a hack.  We would really prefer that w32_mouse_position would
Geoff Voelker's avatar
Geoff Voelker committed
185
   return the time associated with the position it returns, but there
186
   doesn't seem to be any way to wrest the time-stamp from the server
Geoff Voelker's avatar
Geoff Voelker committed
187 188 189
   along with the position query.  So, we just keep track of the time
   of the last movement we received, and return that in hopes that
   it's somewhat accurate.  */
190 191 192 193
static Time last_mouse_movement_time;

/* Incremented by w32_read_socket whenever it really tries to read
   events.  */
Geoff Voelker's avatar
Geoff Voelker committed
194 195 196 197 198 199
#ifdef __STDC__
static int volatile input_signal_count;
#else
static int input_signal_count;
#endif

Daniel Colascione's avatar
Daniel Colascione committed
200 201 202 203
#ifdef CYGWIN
int w32_message_fd = -1;
#endif /* CYGWIN */

204 205 206 207 208 209 210
static void x_update_window_end (struct window *, int, int);
static void w32_handle_tool_bar_click (struct frame *,
                                       struct input_event *);
static void w32_define_cursor (Window, Cursor);

void x_lower_frame (struct frame *);
void x_scroll_bar_clear (struct frame *);
211
void x_wm_set_size_hint (struct frame *, long, bool);
212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237
void x_raise_frame (struct frame *);
void x_set_window_size (struct frame *, int, int, int);
void x_wm_set_window_state (struct frame *, int);
void x_wm_set_icon_pixmap (struct frame *, int);
static void w32_initialize (void);
static void x_update_end (struct frame *);
static void w32_frame_up_to_date (struct frame *);
static void w32_set_terminal_modes (struct terminal *);
static void w32_reset_terminal_modes (struct terminal *);
static void x_clear_frame (struct frame *);
static void frame_highlight (struct frame *);
static void frame_unhighlight (struct frame *);
static void x_new_focus_frame (struct w32_display_info *,
                               struct frame *);
static void x_focus_changed (int, int, struct w32_display_info *,
                             struct frame *, struct input_event *);
static void w32_detect_focus_change (struct w32_display_info *,
                                     W32Msg *, struct input_event *);
static void w32_frame_rehighlight (struct frame *);
static void x_frame_rehighlight (struct w32_display_info *);
static void x_draw_hollow_cursor (struct window *, struct glyph_row *);
static void x_draw_bar_cursor (struct window *, struct glyph_row *, int,
                               enum text_cursor_kinds);
static void w32_clip_to_row (struct window *, struct glyph_row *, int, HDC);
static BOOL my_show_window (struct frame *, HWND, int);
static void my_set_window_pos (HWND, HWND, int, int, int, int, UINT);
238
#if 0
239
static void my_set_focus (struct frame *, HWND);
240
#endif
241 242
static void my_set_foreground_window (HWND);
static void my_destroy_window (struct frame *, HWND);
243

244
#ifdef GLYPH_DEBUG
245 246 247
static void x_check_font (struct frame *, struct font *);
#endif

Geoff Voelker's avatar
Geoff Voelker committed
248 249 250
static Lisp_Object Qvendor_specific_keysyms;


251 252 253 254
/***********************************************************************
			      Debugging
 ***********************************************************************/

Geoff Voelker's avatar
Geoff Voelker committed
255
#if 0
256 257 258

/* This is a function useful for recording debugging information about
   the sequence of occurrences in this file.  */
Geoff Voelker's avatar
Geoff Voelker committed
259

260
struct record
Geoff Voelker's avatar
Geoff Voelker committed
261 262 263 264 265 266 267 268 269
{
  char *locus;
  int type;
};

struct record event_record[100];

int event_record_index;

270
record_event (char *locus, int type)
Geoff Voelker's avatar
Geoff Voelker committed
271 272 273 274 275 276 277 278 279 280 281
{
  if (event_record_index == sizeof (event_record) / sizeof (struct record))
    event_record_index = 0;

  event_record[event_record_index].locus = locus;
  event_record[event_record_index].type = type;
  event_record_index++;
}

#endif /* 0 */

282

283
void
284
XChangeGC (void *ignore, XGCValues *gc, unsigned long mask,
285
	   XGCValues *xgcv)
286 287 288 289 290 291 292 293 294
{
  if (mask & GCForeground)
    gc->foreground = xgcv->foreground;
  if (mask & GCBackground)
    gc->background = xgcv->background;
  if (mask & GCFont)
    gc->font = xgcv->font;
}

295 296
XGCValues *
XCreateGC (void *ignore, Window window, unsigned long mask, XGCValues *xgcv)
297
{
Dmitry Antipov's avatar
Dmitry Antipov committed
298
  XGCValues *gc = xzalloc (sizeof (XGCValues));
299 300 301 302 303 304

  XChangeGC (ignore, gc, mask, xgcv);

  return gc;
}

305
void
306 307
XGetGCValues (void *ignore, XGCValues *gc,
	      unsigned long mask, XGCValues *xgcv)
308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324
{
  XChangeGC (ignore, xgcv, mask, gc);
}

static void
w32_set_clip_rectangle (HDC hdc, RECT *rect)
{
  if (rect)
    {
      HRGN clip_region = CreateRectRgnIndirect (rect);
      SelectClipRgn (hdc, clip_region);
      DeleteObject (clip_region);
    }
  else
    SelectClipRgn (hdc, NULL);
}

325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373
/* Restore clipping rectangle in S */
static void
w32_restore_glyph_string_clip (struct glyph_string *s)
{
  RECT *r = s->clip;
  int n = s->num_clips;

  if (n == 1)
    w32_set_clip_rectangle (s->hdc, r);
  else if (n > 1)
    {
      HRGN clip1 = CreateRectRgnIndirect (r);
      HRGN clip2 = CreateRectRgnIndirect (r + 1);
      if (CombineRgn (clip1, clip1, clip2, RGN_OR) != ERROR)
        SelectClipRgn (s->hdc, clip1);
      DeleteObject (clip1);
      DeleteObject (clip2);
    }
}

/*
   Draw a wavy line under S. The wave fills wave_height pixels from y0.

                    x0         wave_length = 2
                                 --
                y0   *   *   *   *   *
                     |* * * * * * * * *
    wave_height = 3  | *   *   *   *

*/

void
w32_draw_underwave (struct glyph_string *s, COLORREF color)
{
  int wave_height = 2, wave_length = 3;
  int dx, dy, x0, y0, width, x1, y1, x2, y2, odd, xmax;
  XRectangle wave_clip, string_clip, final_clip;
  RECT w32_final_clip, w32_string_clip;
  HPEN hp, oldhp;

  dx = wave_length;
  dy = wave_height - 1;
  x0 = s->x;
  y0 = s->ybase + 1;
  width = s->width;
  xmax = x0 + width;

  /* Find and set clipping rectangle */

374 375 376 377 378
  wave_clip.x = x0;
  wave_clip.y = y0;
  wave_clip.width = width;
  wave_clip.height = wave_height;

379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416
  get_glyph_string_clip_rect (s, &w32_string_clip);
  CONVERT_TO_XRECT (string_clip, w32_string_clip);

  if (!x_intersect_rectangles (&wave_clip, &string_clip, &final_clip))
    return;

  hp = CreatePen (PS_SOLID, 0, color);
  oldhp = SelectObject (s->hdc, hp);
  CONVERT_FROM_XRECT (final_clip, w32_final_clip);
  w32_set_clip_rectangle (s->hdc, &w32_final_clip);

  /* Draw the waves */

  x1 = x0 - (x0 % dx);
  x2 = x1 + dx;
  odd = (x1/dx) % 2;
  y1 = y2 = y0;

  if (odd)
    y1 += dy;
  else
    y2 += dy;

  MoveToEx (s->hdc, x1, y1, NULL);

  while (x1 <= xmax)
    {
      LineTo (s->hdc, x2, y2);
      x1  = x2, y1 = y2;
      x2 += dx, y2 = y0 + odd*dy;
      odd = !odd;
    }

  /* Restore previous pen and clipping rectangle(s) */
  w32_restore_glyph_string_clip (s);
  SelectObject (s->hdc, oldhp);
  DeleteObject (hp);
}
417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439

/* Draw a hollow rectangle at the specified position.  */
void
w32_draw_rectangle (HDC hdc, XGCValues *gc, int x, int y,
                    int width, int height)
{
  HBRUSH hb, oldhb;
  HPEN hp, oldhp;

  hb = CreateSolidBrush (gc->background);
  hp = CreatePen (PS_SOLID, 0, gc->foreground);
  oldhb = SelectObject (hdc, hb);
  oldhp = SelectObject (hdc, hp);

  Rectangle (hdc, x, y, x + width, y + height);

  SelectObject (hdc, oldhb);
  SelectObject (hdc, oldhp);
  DeleteObject (hb);
  DeleteObject (hp);
}

/* Draw a filled rectangle at the specified position. */
440
void
441
w32_fill_rect (FRAME_PTR f, HDC hdc, COLORREF pix, RECT *lprect)
Geoff Voelker's avatar
Geoff Voelker committed
442 443
{
  HBRUSH hb;
444

Geoff Voelker's avatar
Geoff Voelker committed
445 446 447 448 449
  hb = CreateSolidBrush (pix);
  FillRect (hdc, lprect, hb);
  DeleteObject (hb);
}

450
void
451
w32_clear_window (FRAME_PTR f)
Geoff Voelker's avatar
Geoff Voelker committed
452 453
{
  RECT rect;
454
  HDC hdc = get_frame_dc (f);
Geoff Voelker's avatar
Geoff Voelker committed
455

456 457 458 459 460 461 462 463 464
  /* Under certain conditions, this can be called at startup with
     a console frame pointer before the GUI frame is created. An HDC
     of 0 indicates this. */
  if (hdc)
    {
      GetClientRect (FRAME_W32_WINDOW (f), &rect);
      w32_clear_rect (f, hdc, &rect);
    }

465
  release_frame_dc (f, hdc);
Geoff Voelker's avatar
Geoff Voelker committed
466 467
}

468 469 470
#define OPAQUE_FRAME 255

void
471
x_set_frame_alpha (struct frame *f)
472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493
{
  struct w32_display_info *dpyinfo = FRAME_W32_DISPLAY_INFO (f);
  double alpha = 1.0;
  double alpha_min = 1.0;
  BYTE opac;
  LONG ex_style;
  HWND window = FRAME_W32_WINDOW (f);

  /* Older versions of Windows do not support transparency.  */
  if (!pfnSetLayeredWindowAttributes)
    return;

  if (dpyinfo->x_highlight_frame == f)
    alpha = f->alpha[0];
  else
    alpha = f->alpha[1];

  if (FLOATP (Vframe_alpha_lower_limit))
    alpha_min = XFLOAT_DATA (Vframe_alpha_lower_limit);
  else if (INTEGERP (Vframe_alpha_lower_limit))
    alpha_min = (XINT (Vframe_alpha_lower_limit)) / 100.0;

494 495 496
  if (alpha < 0.0)
    return;
  else if (alpha > 1.0)
497 498 499 500 501 502 503 504 505
    alpha = 1.0;
  else if (alpha < alpha_min && alpha_min <= 1.0)
    alpha = alpha_min;

  opac = alpha * OPAQUE_FRAME;

  ex_style = GetWindowLong (window, GWL_EXSTYLE);

  if (opac == OPAQUE_FRAME)
Jason Rumney's avatar
Jason Rumney committed
506
    ex_style &= ~WS_EX_LAYERED;
507 508 509 510 511 512 513 514 515
  else
    ex_style |= WS_EX_LAYERED;

  SetWindowLong (window, GWL_EXSTYLE, ex_style);

  if (opac != OPAQUE_FRAME)
    pfnSetLayeredWindowAttributes (window, 0, opac, LWA_ALPHA);
}

516
int
517
x_display_pixel_height (struct w32_display_info *dpyinfo)
518
{
519 520 521 522
  HDC dc = GetDC (NULL);
  int pixels = GetDeviceCaps (dc, VERTRES);
  ReleaseDC (NULL, dc);
  return pixels;
523 524 525
}

int
526
x_display_pixel_width (struct w32_display_info *dpyinfo)
527
{
528 529 530 531
  HDC dc = GetDC (NULL);
  int pixels = GetDeviceCaps (dc, HORZRES);
  ReleaseDC (NULL, dc);
  return pixels;
532 533
}

Geoff Voelker's avatar
Geoff Voelker committed
534

535 536 537
/***********************************************************************
		    Starting and ending an update
 ***********************************************************************/
538

539 540 541
/* Start an update of frame F.  This function is installed as a hook
   for update_begin, i.e. it is called when update_begin is called.
   This function is called prior to calls to x_update_window_begin for
542
   each window being updated.  */
Geoff Voelker's avatar
Geoff Voelker committed
543

544
static void
545
x_update_begin (struct frame *f)
Geoff Voelker's avatar
Geoff Voelker committed
546
{
547 548
  struct w32_display_info *display_info = FRAME_W32_DISPLAY_INFO (f);

Andrew Innes's avatar
Andrew Innes committed
549 550 551
  if (! FRAME_W32_P (f))
    return;

552 553 554 555 556 557 558
  /* Regenerate display palette before drawing if list of requested
     colors has changed. */
  if (display_info->regen_palette)
  {
    w32_regenerate_palette (f);
    display_info->regen_palette = FALSE;
  }
559
}
Geoff Voelker's avatar
Geoff Voelker committed
560

561 562 563 564 565 566

/* Start update of window W.  Set the global variable updated_window
   to the window being updated and set output_cursor to the cursor
   position of W.  */

static void
567
x_update_window_begin (struct window *w)
568 569
{
  struct frame *f = XFRAME (WINDOW_FRAME (w));
570
  Mouse_HLInfo *hlinfo = MOUSE_HL_INFO (f);
571

572
  /* Hide the system caret during an update.  */
573 574 575 576
  if (w32_use_visible_system_caret && w32_system_caret_hwnd)
    {
      SendMessage (w32_system_caret_hwnd, WM_EMACS_HIDE_CARET, 0, 0);
    }
577

578 579
  updated_window = w;
  set_output_cursor (&w->cursor);
Geoff Voelker's avatar
Geoff Voelker committed
580

581
  block_input ();
Geoff Voelker's avatar
Geoff Voelker committed
582

583
  if (f == hlinfo->mouse_face_mouse_frame)
Geoff Voelker's avatar
Geoff Voelker committed
584 585
    {
      /* Don't do highlighting for mouse motion during the update.  */
586
      hlinfo->mouse_face_defer = 1;
Geoff Voelker's avatar
Geoff Voelker committed
587

588 589
      /* If F needs to be redrawn, simply forget about any prior mouse
	 highlighting.  */
Geoff Voelker's avatar
Geoff Voelker committed
590
      if (FRAME_GARBAGED_P (f))
591
	hlinfo->mouse_face_window = Qnil;
592

593 594 595 596 597 598
#if 0 /* Rows in a current matrix containing glyphs in mouse-face have
	 their mouse_face_p flag set, which means that they are always
	 unequal to rows in a desired matrix which never have that
	 flag set.  So, rows containing mouse-face glyphs are never
	 scrolled, and we don't have to switch the mouse highlight off
	 here to prevent it from being scrolled.  */
599

600 601 602 603 604
      /* Can we tell that this update does not affect the window
	 where the mouse highlight is?  If so, no need to turn off.
	 Likewise, don't do anything if the frame is garbaged;
	 in that case, the frame's current matrix that we would use
	 is all wrong, and we will redisplay that line anyway.  */
605 606
      if (!NILP (hlinfo->mouse_face_window)
	  && w == XWINDOW (hlinfo->mouse_face_window))
Geoff Voelker's avatar
Geoff Voelker committed
607
	{
608
	  int i;
Geoff Voelker's avatar
Geoff Voelker committed
609

610 611
          for (i = 0; i < w->desired_matrix->nrows; ++i)
	    if (MATRIX_ROW_ENABLED_P (w->desired_matrix, i))
Geoff Voelker's avatar
Geoff Voelker committed
612 613
	      break;

614
	  if (i < w->desired_matrix->nrows)
615
	    clear_mouse_face (hlinfo);
Geoff Voelker's avatar
Geoff Voelker committed
616
	}
617
#endif /* 0 */
Geoff Voelker's avatar
Geoff Voelker committed
618 619
    }

620
  unblock_input ();
Geoff Voelker's avatar
Geoff Voelker committed
621 622
}

623
/* Draw a vertical window border from (x,y0) to (x,y1)  */
624

625
static void
626
w32_draw_vertical_window_border (struct window *w, int x, int y0, int y1)
Geoff Voelker's avatar
Geoff Voelker committed
627
{
628
  struct frame *f = XFRAME (WINDOW_FRAME (w));
629 630
  RECT r;
  HDC hdc;
631
  struct face *face;
632

633 634 635 636
  r.left = x;
  r.right = x + 1;
  r.top = y0;
  r.bottom = y1;
637

638
  hdc = get_frame_dc (f);
639 640 641 642 643 644
  face = FACE_FROM_ID (f, VERTICAL_BORDER_FACE_ID);
  if (face)
    w32_fill_rect (f, hdc, face->foreground, &r);
  else
    w32_fill_rect (f, hdc, FRAME_FOREGROUND_PIXEL (f), &r);

645
  release_frame_dc (f, hdc);
646
}
Geoff Voelker's avatar
Geoff Voelker committed
647

648

649 650 651 652 653 654 655 656 657 658 659 660
/* End update of window W (which is equal to updated_window).

   Draw vertical borders between horizontally adjacent windows, and
   display W's cursor if CURSOR_ON_P is non-zero.

   MOUSE_FACE_OVERWRITTEN_P non-zero means that some row containing
   glyphs in mouse-face were overwritten.  In that case we have to
   make sure that the mouse-highlight is properly redrawn.

   W may be a menu bar pseudo-window in case we don't have X toolkit
   support. Such windows don't have a cursor, so don't display it
   here. */
661 662

static void
663 664
x_update_window_end (struct window *w, int cursor_on_p,
		     int mouse_face_overwritten_p)
665
{
666
  Mouse_HLInfo *hlinfo = MOUSE_HL_INFO (XFRAME (w->frame));
667

668 669
  if (!w->pseudo_window_p)
    {
670
      block_input ();
671

672
      if (cursor_on_p)
673 674 675
	display_and_set_cursor (w, 1, output_cursor.hpos,
				output_cursor.vpos,
				output_cursor.x, output_cursor.y);
676

677 678
      if (draw_window_fringes (w, 1))
	x_draw_vertical_border (w);
Kenichi Handa's avatar
Kenichi Handa committed
679

680
      unblock_input ();
681
    }
682 683 684 685 686

  /* If a row with mouse-face was overwritten, arrange for
     XTframe_up_to_date to redisplay the mouse highlight.  */
  if (mouse_face_overwritten_p)
    {
687 688 689
      hlinfo->mouse_face_beg_row = hlinfo->mouse_face_beg_col = -1;
      hlinfo->mouse_face_end_row = hlinfo->mouse_face_end_col = -1;
      hlinfo->mouse_face_window = Qnil;
690 691
    }

692 693 694
  /* Unhide the caret.  This won't actually show the cursor, unless it
     was visible before the corresponding call to HideCaret in
     x_update_window_begin.  */
695 696 697 698
  if (w32_use_visible_system_caret && w32_system_caret_hwnd)
    {
      SendMessage (w32_system_caret_hwnd, WM_EMACS_SHOW_CARET, 0, 0);
    }
699

700 701 702
  updated_window = NULL;
}

703 704 705 706

/* End update of frame F.  This function is installed as a hook in
   update_end.  */

707
static void
708
x_update_end (struct frame *f)
709
{
Andrew Innes's avatar
Andrew Innes committed
710 711 712
  if (! FRAME_W32_P (f))
    return;

713
  /* Mouse highlight may be displayed again.  */
714
  MOUSE_HL_INFO (f)->mouse_face_defer = 0;
Geoff Voelker's avatar
Geoff Voelker committed
715 716
}

717

718 719 720
/* This function is called from various places in xdisp.c whenever a
   complete update has been performed.  The global variable
   updated_window is not available here.  */
Geoff Voelker's avatar
Geoff Voelker committed
721

722
static void
723
w32_frame_up_to_date (struct frame *f)
Geoff Voelker's avatar
Geoff Voelker committed
724
{
725
  if (FRAME_W32_P (f))
Geoff Voelker's avatar
Geoff Voelker committed
726
    {
727
      Mouse_HLInfo *hlinfo = MOUSE_HL_INFO (f);
728

729 730
      if (hlinfo->mouse_face_deferred_gc
	  || f == hlinfo->mouse_face_mouse_frame)
731
	{
732
	  block_input ();
733 734 735 736 737
	  if (hlinfo->mouse_face_mouse_frame)
	    note_mouse_highlight (hlinfo->mouse_face_mouse_frame,
				  hlinfo->mouse_face_mouse_x,
				  hlinfo->mouse_face_mouse_y);
	  hlinfo->mouse_face_deferred_gc = 0;
738
	  unblock_input ();
739
	}
Geoff Voelker's avatar
Geoff Voelker committed
740 741
    }
}
742 743 744


/* Draw truncation mark bitmaps, continuation mark bitmaps, overlay
Kim F. Storm's avatar
Kim F. Storm committed
745
   arrow bitmaps, or clear the fringes if no bitmaps are required
746
   before DESIRED_ROW is made current.  The window being updated is
747
   found in updated_window.  This function is called from
748 749 750 751
   update_window_line only if it is known that there are differences
   between bitmaps to be drawn between current row and DESIRED_ROW.  */

static void
752
x_after_update_window_line (struct glyph_row *desired_row)
753 754
{
  struct window *w = updated_window;
755 756 757
  struct frame *f;
  int width, height;

758
  eassert (w);
759

760
  if (!desired_row->mode_line_p && !w->pseudo_window_p)
Kenichi Handa's avatar
Kenichi Handa committed
761
    desired_row->redraw_fringe_bitmaps_p = 1;
762

763 764 765 766 767 768 769 770
  /* When a window has disappeared, make sure that no rest of
     full-width rows stays visible in the internal border.  Could
     check here if updated_window is the leftmost/rightmost window,
     but I guess it's not worth doing since vertically split windows
     are almost never used, internal border is rarely set, and the
     overhead is very small.  */
  if (windows_or_buffers_changed
      && desired_row->full_width_p
771
      && (f = XFRAME (w->frame),
772 773 774 775 776 777
	  width = FRAME_INTERNAL_BORDER_WIDTH (f),
	  width != 0)
      && (height = desired_row->visible_height,
	  height > 0))
    {
      int y = WINDOW_TO_FRAME_PIXEL_Y (w, max (0, desired_row->y));
778

779
      block_input ();
780 781 782
      {
	HDC hdc = get_frame_dc (f);
	w32_clear_area (f, hdc, 0, y, width, height);
783
	w32_clear_area (f, hdc, FRAME_PIXEL_WIDTH (f) - width,
784 785 786
			y, width, height);
	release_frame_dc (f, hdc);
      }
787
      unblock_input ();
788 789 790 791
    }
}


Kim F. Storm's avatar
Kim F. Storm committed
792
/* Draw the bitmap WHICH in one of the left or right fringes of
793 794 795 796 797
   window W.  ROW is the glyph row for which to display the bitmap; it
   determines the vertical position at which the bitmap has to be
   drawn.  */

static void
798 799
w32_draw_fringe_bitmap (struct window *w, struct glyph_row *row,
			struct draw_fringe_bitmap_params *p)
800 801
{
  struct frame *f = XFRAME (WINDOW_FRAME (w));
Kim F. Storm's avatar
Kim F. Storm committed
802 803 804 805
  HDC hdc;
  struct face *face = p->face;

  hdc = get_frame_dc (f);
806

807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822
  if (!p->overlay_p)
    {
      int bx = p->bx, by = p->by, nx = p->nx, ny = p->ny;

      /* If the fringe is adjacent to the left (right) scroll bar of a
	 leftmost (rightmost, respectively) window, then extend its
	 background to the gap between the fringe and the bar.  */
      if ((WINDOW_LEFTMOST_P (w)
	   && WINDOW_HAS_VERTICAL_SCROLL_BAR_ON_LEFT (w))
	  || (WINDOW_RIGHTMOST_P (w)
	      && WINDOW_HAS_VERTICAL_SCROLL_BAR_ON_RIGHT (w)))
	{
	  int sb_width = WINDOW_CONFIG_SCROLL_BAR_WIDTH (w);

	  if (sb_width > 0)
	    {
823 824 825
	      int bar_area_x = WINDOW_SCROLL_BAR_AREA_X (w);
	      int bar_area_width = (WINDOW_CONFIG_SCROLL_BAR_COLS (w)
				    * FRAME_COLUMN_WIDTH (f));
826 827 828 829

	      if (bx < 0)
		{
		  /* Bitmap fills the fringe.  */
830 831 832 833
		  if (bar_area_x + bar_area_width == p->x)
		    bx = bar_area_x + sb_width;
		  else if (p->x + p->wd == bar_area_x)
		    bx = bar_area_x;
834 835 836 837
		  if (bx >= 0)
		    {
		      int header_line_height = WINDOW_HEADER_LINE_HEIGHT (w);

838
		      nx = bar_area_width - sb_width;
839 840 841 842 843 844 845
		      by = WINDOW_TO_FRAME_PIXEL_Y (w, max (header_line_height,
							    row->y));
		      ny = row->visible_height;
		    }
		}
	      else
		{
846
		  if (bar_area_x + bar_area_width == bx)
847
		    {
848 849
		      bx = bar_area_x + sb_width;
		      nx += bar_area_width - sb_width;
850
		    }
851 852
		  else if (bx + nx == bar_area_x)
		    nx += bar_area_width - sb_width;
853 854 855 856 857 858 859 860
		}
	    }
	}

      if (bx >= 0 && nx > 0)
	w32_fill_area (f, hdc, face->background, bx, by, nx, ny);
    }

861
  /* Must clip because of partially visible lines.  */
862
  w32_clip_to_row (w, row, -1, hdc);
863

864
  if (p->which && p->which < max_fringe_bmp)
Kim F. Storm's avatar
Kim F. Storm committed
865 866 867 868
    {
      HBITMAP pixmap = fringe_bmp[p->which];
      HDC compat_hdc;
      HANDLE horig_obj;
869

Kim F. Storm's avatar
Kim F. Storm committed
870
      compat_hdc = CreateCompatibleDC (hdc);
Kenichi Handa's avatar
Kenichi Handa committed
871

Kim F. Storm's avatar
Kim F. Storm committed
872
      SaveDC (hdc);
873

Kim F. Storm's avatar
Kim F. Storm committed
874
      horig_obj = SelectObject (compat_hdc, pixmap);
875

Kenichi Handa's avatar
Kenichi Handa committed
876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909
      /* Paint overlays transparently.  */
      if (p->overlay_p)
	{
	  HBRUSH h_brush, h_orig_brush;

	  SetTextColor (hdc, BLACK_PIX_DEFAULT (f));
	  SetBkColor (hdc, WHITE_PIX_DEFAULT (f));
	  h_brush = CreateSolidBrush (face->foreground);
	  h_orig_brush = SelectObject (hdc, h_brush);

	  BitBlt (hdc, p->x, p->y, p->wd, p->h,
		  compat_hdc, 0, p->dh,
		  DSTINVERT);
	  BitBlt (hdc, p->x, p->y, p->wd, p->h,
		  compat_hdc, 0, p->dh,
		  0x2E064A);
	  BitBlt (hdc, p->x, p->y, p->wd, p->h,
		  compat_hdc, 0, p->dh,
		  DSTINVERT);

	  SelectObject (hdc, h_orig_brush);
	  DeleteObject (h_brush);
	}
      else
	{
	  SetTextColor (hdc, face->background);
	  SetBkColor (hdc, (p->cursor_p
			    ? f->output_data.w32->cursor_pixel
			    : face->foreground));

	  BitBlt (hdc, p->x, p->y, p->wd, p->h,
		  compat_hdc, 0, p->dh,
		  SRCCOPY);
	}
910

Kim F. Storm's avatar
Kim F. Storm committed
911 912 913
      SelectObject (compat_hdc, horig_obj);
      DeleteDC (compat_hdc);
      RestoreDC (hdc, -1);
914
    }
915

Kim F. Storm's avatar
Kim F. Storm committed
916
  w32_set_clip_rectangle (hdc, NULL);
917 918 919 920

  release_frame_dc (f, hdc);
}

Kenichi Handa's avatar
Kenichi Handa committed
921
static void
922
w32_define_fringe_bitmap (int which, unsigned short *bits, int h, int wd)
Kenichi Handa's avatar
Kenichi Handa committed
923
{
924 925 926 927 928 929 930 931 932
  if (which >= max_fringe_bmp)
    {
      int i = max_fringe_bmp;
      max_fringe_bmp = which + 20;
      fringe_bmp = (HBITMAP *) xrealloc (fringe_bmp, max_fringe_bmp * sizeof (HBITMAP));
      while (i < max_fringe_bmp)
	fringe_bmp[i++] = 0;
    }

Kenichi Handa's avatar
Kenichi Handa committed
933 934 935 936
  fringe_bmp[which] = CreateBitmap (wd, h, 1, 1, bits);
}

static void
937
w32_destroy_fringe_bitmap (int which)
Kenichi Handa's avatar
Kenichi Handa committed
938
{
939 940 941
  if (which >= max_fringe_bmp)
    return;

Kenichi Handa's avatar
Kenichi Handa committed
942 943 944 945 946 947
  if (fringe_bmp[which])
    DeleteObject (fringe_bmp[which]);
  fringe_bmp[which] = 0;
}


Geoff Voelker's avatar
Geoff Voelker committed
948

949 950 951 952
/* This is called when starting Emacs and when restarting after
   suspend.  When starting Emacs, no window is mapped.  And nothing
   must be done to Emacs's own window if it is suspended (though that
   rarely happens).  */
Geoff Voelker's avatar
Geoff Voelker committed
953

954
static void
955
w32_set_terminal_modes (struct terminal *term)
Geoff Voelker's avatar
Geoff Voelker committed
956 957 958
{
}

959
/* This is called when exiting or suspending Emacs.  Exiting will make
960
   the W32 windows go away, and suspending requires no action. */
Geoff Voelker's avatar
Geoff Voelker committed
961

962
static void
963
w32_reset_terminal_modes (struct terminal *term)
Geoff Voelker's avatar
Geoff Voelker committed
964 965
{
}
966

967

968

969 970 971 972 973 974
/***********************************************************************
			   Display Iterator
 ***********************************************************************/

/* Function prototypes of this page.  */

975 976 977 978 979 980 981 982 983 984 985
static void x_set_glyph_string_clipping (struct glyph_string *);
static void x_set_glyph_string_gc (struct glyph_string *);
static void x_draw_glyph_string_background (struct glyph_string *,
                                            int);
static void x_draw_glyph_string_foreground (struct glyph_string *);
static void x_draw_composite_glyph_string_foreground (struct glyph_string *);
static void x_draw_glyph_string_box (struct glyph_string *);
static void x_draw_glyph_string  (struct glyph_string *);
static void x_set_cursor_gc (struct glyph_string *);
static void x_set_mode_line_face_gc (struct glyph_string *);
static void x_set_mouse_face_gc (struct glyph_string *);
986
static int w32_alloc_lighter_color (struct frame *, COLORREF *, double, int);
987 988 989 990 991 992 993 994 995 996 997 998 999 1000
static void w32_setup_relief_color (struct frame *, struct relief *,
                                    double, int, COLORREF);
static void x_setup_relief_colors (struct glyph_string *);
static void x_draw_image_glyph_string (struct glyph_string *);
static void x_draw_image_relief (struct glyph_string *);
static void x_draw_image_foreground (struct glyph_string *);
static void w32_draw_image_foreground_1 (struct glyph_string *, HBITMAP);
static void x_clear_glyph_string_rect (struct glyph_string *, int,
                                       int, int, int);
static void w32_draw_relief_rect (struct frame *, int, int, int, int,
                                  int, int, int, int, int, int,
                                  RECT *);
static void w32_draw_box_rect (struct glyph_string *, int, int, int, int,
                               int, int, int, RECT *);
1001

1002

1003 1004 1005 1006
/* Set S->gc to a suitable GC for drawing glyph string S in cursor
   face.  */

static void
1007
x_set_cursor_gc (struct glyph_string *s)
1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055
{
  if (s->font == FRAME_FONT (s->f)
      && s->face->background == FRAME_BACKGROUND_PIXEL (s->f)
      && s->face->foreground == FRAME_FOREGROUND_PIXEL (s->f)
      && !s->cmp)
    s->gc = s->f->output_data.w32->cursor_gc;
  else
    {
      /* Cursor on non-default face: must merge.  */
      XGCValues xgcv;
      unsigned long mask;

      xgcv.background = s->f->output_data.w32->cursor_pixel;
      xgcv.foreground = s->face->background;

      /* If the glyph would be invisible, try a different foreground.  */
      if (xgcv.foreground == xgcv.background)
	xgcv.foreground = s->face->foreground;
      if (xgcv.foreground == xgcv.background)
	xgcv.foreground = s->f->output_data.w32->cursor_foreground_pixel;
      if (xgcv.foreground == xgcv.background)
	xgcv.foreground = s->face->foreground;

      /* Make sure the cursor is distinct from text in this face.  */
      if (xgcv.background == s->face->background
	  && xgcv.foreground == s->face->foreground)
	{
	  xgcv.background = s->face->foreground;
	  xgcv.foreground = s->face->background;
	}

      IF_DEBUG (x_check_font (s->f, s->font));
      xgcv.font = s->font;
      mask = GCForeground | GCBackground | GCFont;

      if (FRAME_W32_DISPLAY_INFO (s->f)->scratch_cursor_gc)
	XChangeGC (NULL, FRAME_W32_DISPLAY_INFO (s->f)->scratch_cursor_gc,
		   mask, &xgcv);
      else
	FRAME_W32_DISPLAY_INFO (s->f)->scratch_cursor_gc
	  = XCreateGC (NULL, s->window, mask, &xgcv);

      s->gc = FRAME_W32_DISPLAY_INFO (s->f)->scratch_cursor_gc;
    }
}


/* Set up S->gc of glyph string S for drawing text in mouse face.  */
1056

1057
static void
1058
x_set_mouse_face_gc (struct glyph_string *s)
1059
{
1060
  int face_id;
1061
  struct face *face;
1062

1063
  /* What face has to be used last for the mouse face?  */
1064
  face_id = MOUSE_HL_INFO (s->f)->mouse_face_face_id;
1065
  face = FACE_FROM_ID (s->f, face_id);
1066 1067
  if (face == NULL)
    face = FACE_FROM_ID (s->f, MOUSE_FACE_ID);
1068

1069
  if (s->first_glyph->type == CHAR_GLYPH)
1070
    face_id = FACE_FOR_CHAR (s->f, face, s->first_glyph->u.ch, -1, Qnil);
1071
  else
1072
    face_id = FACE_FOR_CHAR (s->f, face, 0, -1, Qnil);
1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084
  s->face = FACE_FROM_ID (s->f, face_id);
  PREPARE_FACE_FOR_DISPLAY (s->f, s->face);

  /* If font in this face is same as S->font, use it.  */
  if (s->font == s->face->font)
    s->gc = s->face->gc;
  else
    {
      /* Otherwise construct scratch_cursor_gc with values from FACE
	 but font FONT.  */
      XGCValues xgcv;
      unsigned long mask;
1085

1086 1087 1088 1089 1090
      xgcv.background = s->face->background;
      xgcv.foreground = s->face->foreground;
      IF_DEBUG (x_check_font (s->f, s->font));
      xgcv.font = s->font;
      mask = GCForeground | GCBackground | GCFont;
1091

1092 1093 1094 1095 1096 1097
      if (FRAME_W32_DISPLAY_INFO (s->f)->scratch_cursor_gc)
	XChangeGC (NULL, FRAME_W32_DISPLAY_INFO (s->f)->scratch_cursor_gc,
		   mask, &xgcv);
      else
	FRAME_W32_DISPLAY_INFO (s->f)->scratch_cursor_gc
	  = XCreateGC (NULL, s->window, mask, &xgcv);
1098

1099 1100 1101
      s->gc = FRAME_W32_DISPLAY_INFO (s->f)->scratch_cursor_gc;
    }

1102
  eassert (s->gc != 0);
1103 1104 1105 1106 1107 1108 1109
}


/* Set S->gc of glyph string S to a GC suitable for drawing a mode line.
   Faces to use in the mode line have already been computed when the
   matrix was built, so there isn't much to do, here.  */

Paul Eggert's avatar
Paul Eggert committed
1110
static inline void
1111
x_set_mode_line_face_gc (struct glyph_string *s)
1112
{
1113 1114 1115 1116 1117 1118 1119 1120
  s->gc = s->face->gc;
}


/* Set S->gc of glyph string S for drawing that glyph string.  Set
   S->stippled_p to a non-zero value if the face of S has a stipple
   pattern.  */

Paul Eggert's avatar
Paul Eggert committed
1121
static inline void
1122
x_set_glyph_string_gc (struct glyph_string *s)
1123
{
1124
  PREPARE_FACE_FOR_DISPLAY (s->f, s->face);
1125

1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158
  if (s->hl == DRAW_NORMAL_TEXT)
    {
      s->gc = s->face->gc;
      s->stippled_p = s->face->stipple != 0;
    }
  else if (s->hl == DRAW_INVERSE_VIDEO)
    {
      x_set_mode_line_face_gc (s);
      s->stippled_p = s->face->stipple != 0;
    }
  else if (s->hl == DRAW_CURSOR)
    {
      x_set_cursor_gc (s);
      s->stippled_p = 0;
    }
  else if (s->hl == DRAW_MOUSE_FACE)
    {
      x_set_mouse_face_gc (s);
      s->stippled_p = s->face->stipple != 0;
    }
  else if (s->hl == DRAW_IMAGE_RAISED
	   || s->hl == DRAW_IMAGE_SUNKEN)
    {
      s->gc = s->face->gc;
      s->stippled_p = s->face->stipple != 0;
    }
  else
    {
      s->gc = s->face->gc;
      s->stippled_p = s->face->stipple != 0;
    }

  /* GC must have been set.  */
1159
  eassert (s->gc != 0);
1160 1161 1162 1163 1164 1165
}


/* Set clipping for output of glyph string S.  S may be part of a mode
   line or menu if we don't have X toolkit support.  */

Paul Eggert's avatar
Paul Eggert committed
1166
static inline void
1167
x_set_glyph_string_clipping (struct glyph_string *s)
1168
{
1169 1170 1171 1172 1173 1174 1175
  RECT *r = s->clip;
  int n = get_glyph_string_clip_rects (s, r, 2);

  if (n == 1)
    w32_set_clip_rectangle (s->hdc, r);
  else if (n > 1)
    {
1176 1177 1178 1179
      HRGN clip1 = CreateRectRgnIndirect (r);
      HRGN clip2 = CreateRectRgnIndirect (r + 1);
      if (CombineRgn (clip1, clip1, clip2, RGN_OR) != ERROR)
        SelectClipRgn (s->hdc, clip1);
1180 1181 1182 1183
      DeleteObject (clip1);
      DeleteObject (clip2);
    }
    s->num_clips = n;
1184 1185
}

Jason Rumney's avatar
Jason Rumney committed
1186 1187 1188 1189 1190
/* Set SRC's clipping for output of glyph string DST.  This is called
   when we are drawing DST's left_overhang or right_overhang only in
   the area of SRC.  */

static void
1191 1192
x_set_glyph_string_clipping_exactly (struct glyph_string *src,
				     struct glyph_string *dst)
Jason Rumney's avatar
Jason Rumney committed
1193 1194 1195
{
  RECT r;

1196 1197 1198 1199 1200 1201
  r.left = src->x;
  r.right = r.left + src->width;
  r.top = src->y;
  r.bottom = r.top + src->height;
  dst->clip[0] = r;
  dst->num_clips = 1;
Jason Rumney's avatar
Jason Rumney committed
1202 1203
  w32_set_clip_rectangle (dst->hdc, &r);
}
1204

1205
/* RIF:
1206
   Compute left and right overhang of glyph string S.  */
1207

1208
static void
1209
w32_compute_glyph_string_overhangs (struct glyph_string *s)
1210
{
1211
  if (s->cmp == NULL
1212 1213
      && s->first_glyph->type == CHAR_GLYPH
      && !s->font_not_found_p)
1214
    {
1215 1216 1217 1218
      unsigned *code = alloca (sizeof (unsigned) * s->nchars);
      struct font *font = s->font;
      struct font_metrics metrics;
      int i;
1219

1220 1221 1222 1223 1224 1225
      for (i = 0; i < s->nchars; i++)
	code[i] = s->char2b[i];
      font->driver->text_extents (font, code, s->nchars, &metrics);
      s->right_overhang = (metrics.rbearing > metrics.width
			   ? metrics.rbearing - metrics.width : 0);
      s->left_overhang = metrics.lbearing < 0 ? -metrics.lbearing : 0;
1226 1227 1228