2 * VGA hardware emulation
4 * Copyright 1998 Ove Kåven (with some help from Marcus Meissner)
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 #define NONAMELESSUNION
25 #define NONAMELESSSTRUCT
35 #include "wine/debug.h"
37 WINE_DEFAULT_DEBUG_CHANNEL(ddraw);
39 static IDirectDraw *lpddraw = NULL;
40 static IDirectDrawSurface *lpddsurf;
41 static IDirectDrawPalette *lpddpal;
42 static DDSURFACEDESC sdesc;
44 static BOOL vga_retrace_vertical;
45 static BOOL vga_retrace_horizontal;
48 * Size and location of VGA controller window to framebuffer.
50 * Note: We support only single window even though some
51 * controllers support two. This should not be changed unless
52 * there are programs that depend on having two windows.
54 #define VGA_WINDOW_SIZE (64 * 1024)
55 #define VGA_WINDOW_START ((char *)0xa0000)
58 * VGA controller memory is emulated using linear framebuffer.
59 * This frambuffer also acts as an interface
60 * between VGA controller emulation and DirectDraw.
62 * vga_fb_width: Display width in pixels. Can be modified when
63 * display mode is changed.
64 * vga_fb_height: Display height in pixels. Can be modified when
65 * display mode is changed.
66 * vga_fb_depth: Number of bits used to store single pixel color information.
67 * Each pixel uses (vga_fb_depth+7)/8 bytes because
68 * 1-16 color modes are mapped to 256 color mode.
69 * Can be modified when display mode is changed.
70 * vga_fb_pitch: How many bytes to add to pointer in order to move
71 * from one row to another. This is fixed in VGA modes,
72 * but can be modified in SVGA modes.
73 * vga_fb_offset: Offset added to framebuffer start address in order
74 * to find the display origin. Programs use this to do
75 * double buffering and to scroll display. The value can
76 * be modified in VGA and SVGA modes.
77 * vga_fb_size: How many bytes are allocated to framebuffer.
78 * VGA framebuffers are always larger than display size and
79 * SVGA framebuffers may also be.
80 * vga_fb_data: Pointer to framebuffer start.
81 * vga_fb_window: Offset of 64k window 0xa0000 in bytes from framebuffer start.
82 * This value is >= 0, if mode uses linear framebuffer and
83 * -1, if mode uses color planes. This value is fixed
84 * in all modes except 0x13 (256 color VGA) where
85 * 0 means normal mode and -1 means Mode-X (unchained mode).
87 static int vga_fb_width;
88 static int vga_fb_height;
89 static int vga_fb_depth;
90 static int vga_fb_pitch;
91 static int vga_fb_offset;
92 static int vga_fb_size = 0;
93 static char *vga_fb_data = 0;
94 static int vga_fb_window = 0;
99 * vga_text_attr: Current active attribute.
100 * vga_text_old: Last data sent to console.
101 * This is used to optimize console updates.
102 * vga_text_width: Width of the text display in characters.
103 * vga_text_height: Height of the text display in characters.
104 * vga_text_x: Current cursor X-position. Starts from zero.
105 * vga_text_y: Current cursor Y-position. Starts from zero.
106 * vga_text_console: TRUE if stdout is console,
107 * FALSE if it is regular file.
109 static BYTE vga_text_attr;
110 static char *vga_text_old = NULL;
111 static BYTE vga_text_width;
112 static BYTE vga_text_height;
113 static BYTE vga_text_x;
114 static BYTE vga_text_y;
115 static BOOL vga_text_console;
118 * VGA controller ports 0x3c0, 0x3c4, 0x3ce and 0x3d4 are
119 * indexed registers. These ports are used to select VGA controller
120 * subregister that can be written to or read from using ports 0x3c1,
121 * 0x3c5, 0x3cf or 0x3d5. Selected subregister indexes are
122 * stored in variables vga_index_*.
124 * Port 0x3c0 is special because it is both index and
125 * data-write register. Flip-flop vga_address_3c0 tells whether
126 * the port acts currently as an address register. Reading from port
127 * 0x3da resets the flip-flop to address mode.
129 static BYTE vga_index_3c0;
130 static BYTE vga_index_3c4;
131 static BYTE vga_index_3ce;
132 static BYTE vga_index_3d4;
133 static BOOL vga_address_3c0 = TRUE;
136 * This mutex is used to protect VGA state during asynchronous
137 * screen updates (see VGA_Poll). It makes sure that VGA state changes
138 * are atomic and the user interface is protected from flicker and
141 * The mutex actually serializes VGA operations and the screen update.
142 * Which means that whenever VGA_Poll occurs, application stalls if it
143 * tries to modify VGA state. This is not how real VGA adapters work,
144 * but it makes timing and correctness issues much easier to deal with.
146 static CRITICAL_SECTION vga_lock;
147 static CRITICAL_SECTION_DEBUG critsect_debug =
150 { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
151 0, 0, { 0, (DWORD)(__FILE__ ": vga_lock") }
153 static CRITICAL_SECTION vga_lock = { &critsect_debug, -1, 0, 0, 0, 0 };
155 typedef HRESULT (WINAPI *DirectDrawCreateProc)(LPGUID,LPDIRECTDRAW *,LPUNKNOWN);
156 static DirectDrawCreateProc pDirectDrawCreate;
158 static void CALLBACK VGA_Poll( LPVOID arg, DWORD low, DWORD high );
160 static HWND vga_hwnd = NULL;
163 * For simplicity, I'm creating a second palette.
164 * 16 color accesses will use these pointers and insert
165 * entries from the 64-color palette into the default
166 * palette. --Robert 'Admiral' Coeyman
169 static char vga_16_palette[17]={
170 0x00, /* 0 - Black */
172 0x02, /* 2 - Green */
175 0x05, /* 5 - Magenta */
176 0x14, /* 6 - Brown */
177 0x07, /* 7 - Light gray */
178 0x38, /* 8 - Dark gray */
179 0x39, /* 9 - Light blue */
180 0x3a, /* A - Light green */
181 0x3b, /* B - Light cyan */
182 0x3c, /* C - Light red */
183 0x3d, /* D - Light magenta */
184 0x3e, /* E - Yellow */
185 0x3f, /* F - White */
186 0x00 /* Border Color */
189 static PALETTEENTRY vga_def_palette[256]={
191 {0x00, 0x00, 0x00}, /* 0 - Black */
192 {0x00, 0x00, 0x80}, /* 1 - Blue */
193 {0x00, 0x80, 0x00}, /* 2 - Green */
194 {0x00, 0x80, 0x80}, /* 3 - Cyan */
195 {0x80, 0x00, 0x00}, /* 4 - Red */
196 {0x80, 0x00, 0x80}, /* 5 - Magenta */
197 {0x80, 0x80, 0x00}, /* 6 - Brown */
198 {0xC0, 0xC0, 0xC0}, /* 7 - Light gray */
199 {0x80, 0x80, 0x80}, /* 8 - Dark gray */
200 {0x00, 0x00, 0xFF}, /* 9 - Light blue */
201 {0x00, 0xFF, 0x00}, /* A - Light green */
202 {0x00, 0xFF, 0xFF}, /* B - Light cyan */
203 {0xFF, 0x00, 0x00}, /* C - Light red */
204 {0xFF, 0x00, 0xFF}, /* D - Light magenta */
205 {0xFF, 0xFF, 0x00}, /* E - Yellow */
206 {0xFF, 0xFF, 0xFF}, /* F - White */
207 {0,0,0} /* FIXME: a series of continuous rainbow hues should follow */
211 * This palette is the dos default, converted from 18 bit color to 24.
212 * It contains only 64 entries of colors--all others are zeros.
213 * --Robert 'Admiral' Coeyman
215 static PALETTEENTRY vga_def64_palette[256]={
217 {0x00, 0x00, 0x00}, /* 0x00 Black */
218 {0x00, 0x00, 0xaa}, /* 0x01 Blue */
219 {0x00, 0xaa, 0x00}, /* 0x02 Green */
220 {0x00, 0xaa, 0xaa}, /* 0x03 Cyan */
221 {0xaa, 0x00, 0x00}, /* 0x04 Red */
222 {0xaa, 0x00, 0xaa}, /* 0x05 Magenta */
223 {0xaa, 0xaa, 0x00}, /* 0x06 */
224 {0xaa, 0xaa, 0xaa}, /* 0x07 Light Gray */
225 {0x00, 0x00, 0x55}, /* 0x08 */
226 {0x00, 0x00, 0xff}, /* 0x09 */
227 {0x00, 0xaa, 0x55}, /* 0x0a */
228 {0x00, 0xaa, 0xff}, /* 0x0b */
229 {0xaa, 0x00, 0x55}, /* 0x0c */
230 {0xaa, 0x00, 0xff}, /* 0x0d */
231 {0xaa, 0xaa, 0x55}, /* 0x0e */
232 {0xaa, 0xaa, 0xff}, /* 0x0f */
233 {0x00, 0x55, 0x00}, /* 0x10 */
234 {0x00, 0x55, 0xaa}, /* 0x11 */
235 {0x00, 0xff, 0x00}, /* 0x12 */
236 {0x00, 0xff, 0xaa}, /* 0x13 */
237 {0xaa, 0x55, 0x00}, /* 0x14 Brown */
238 {0xaa, 0x55, 0xaa}, /* 0x15 */
239 {0xaa, 0xff, 0x00}, /* 0x16 */
240 {0xaa, 0xff, 0xaa}, /* 0x17 */
241 {0x00, 0x55, 0x55}, /* 0x18 */
242 {0x00, 0x55, 0xff}, /* 0x19 */
243 {0x00, 0xff, 0x55}, /* 0x1a */
244 {0x00, 0xff, 0xff}, /* 0x1b */
245 {0xaa, 0x55, 0x55}, /* 0x1c */
246 {0xaa, 0x55, 0xff}, /* 0x1d */
247 {0xaa, 0xff, 0x55}, /* 0x1e */
248 {0xaa, 0xff, 0xff}, /* 0x1f */
249 {0x55, 0x00, 0x00}, /* 0x20 */
250 {0x55, 0x00, 0xaa}, /* 0x21 */
251 {0x55, 0xaa, 0x00}, /* 0x22 */
252 {0x55, 0xaa, 0xaa}, /* 0x23 */
253 {0xff, 0x00, 0x00}, /* 0x24 */
254 {0xff, 0x00, 0xaa}, /* 0x25 */
255 {0xff, 0xaa, 0x00}, /* 0x26 */
256 {0xff, 0xaa, 0xaa}, /* 0x27 */
257 {0x55, 0x00, 0x55}, /* 0x28 */
258 {0x55, 0x00, 0xff}, /* 0x29 */
259 {0x55, 0xaa, 0x55}, /* 0x2a */
260 {0x55, 0xaa, 0xff}, /* 0x2b */
261 {0xff, 0x00, 0x55}, /* 0x2c */
262 {0xff, 0x00, 0xff}, /* 0x2d */
263 {0xff, 0xaa, 0x55}, /* 0x2e */
264 {0xff, 0xaa, 0xff}, /* 0x2f */
265 {0x55, 0x55, 0x00}, /* 0x30 */
266 {0x55, 0x55, 0xaa}, /* 0x31 */
267 {0x55, 0xff, 0x00}, /* 0x32 */
268 {0x55, 0xff, 0xaa}, /* 0x33 */
269 {0xff, 0x55, 0x00}, /* 0x34 */
270 {0xff, 0x55, 0xaa}, /* 0x35 */
271 {0xff, 0xff, 0x00}, /* 0x36 */
272 {0xff, 0xff, 0xaa}, /* 0x37 */
273 {0x55, 0x55, 0x55}, /* 0x38 Dark Gray */
274 {0x55, 0x55, 0xff}, /* 0x39 Light Blue */
275 {0x55, 0xff, 0x55}, /* 0x3a Light Green */
276 {0x55, 0xff, 0xff}, /* 0x3b Light Cyan */
277 {0xff, 0x55, 0x55}, /* 0x3c Light Red */
278 {0xff, 0x55, 0xff}, /* 0x3d Light Magenta */
279 {0xff, 0xff, 0x55}, /* 0x3e Yellow */
280 {0xff, 0xff, 0xff}, /* 0x3f White */
281 {0,0,0} /* The next 192 entries are all zeros */
284 static HANDLE VGA_timer;
285 static HANDLE VGA_timer_thread;
287 /* set the timer rate; called in the polling thread context */
288 static void CALLBACK set_timer_rate( ULONG_PTR arg )
292 when.s.LowPart = when.s.HighPart = 0;
293 SetWaitableTimer( VGA_timer, &when, arg, VGA_Poll, 0, FALSE );
296 static DWORD CALLBACK VGA_TimerThread( void *dummy )
298 for (;;) SleepEx( INFINITE, TRUE );
301 static void VGA_DeinstallTimer(void)
303 if (VGA_timer_thread)
306 * Make sure the update thread is not holding
307 * system resources when we kill it.
309 * Now, we only need to worry about update thread
310 * getting terminated while in EnterCriticalSection
311 * or WaitForMultipleObjectsEx.
313 * FIXME: Is this a problem?
315 EnterCriticalSection(&vga_lock);
317 CancelWaitableTimer( VGA_timer );
318 CloseHandle( VGA_timer );
319 TerminateThread( VGA_timer_thread, 0 );
320 CloseHandle( VGA_timer_thread );
321 VGA_timer_thread = 0;
323 LeaveCriticalSection(&vga_lock);
326 * Synchronize display. This makes sure that
327 * changes to display become visible even if program
328 * terminates before update thread had time to run.
334 static void VGA_InstallTimer(unsigned Rate)
336 if (!VGA_timer_thread)
338 VGA_timer = CreateWaitableTimerA( NULL, FALSE, NULL );
339 VGA_timer_thread = CreateThread( NULL, 0, VGA_TimerThread, NULL, 0, NULL );
341 QueueUserAPC( set_timer_rate, VGA_timer_thread, (ULONG_PTR)Rate );
344 static BOOL VGA_IsTimerRunning(void)
346 return VGA_timer_thread ? TRUE : FALSE;
349 HANDLE VGA_AlphaConsole(void)
351 /* this assumes that no Win32 redirection has taken place, but then again,
352 * only 16-bit apps are likely to use this part of Wine... */
353 return GetStdHandle(STD_OUTPUT_HANDLE);
356 char*VGA_AlphaBuffer(void)
358 return (char *)0xb8000;
361 /*** GRAPHICS MODE ***/
364 unsigned Xres, Yres, Depth;
369 /**********************************************************************
372 * Copy VGA window into framebuffer (if argument is TRUE) or
373 * part of framebuffer into VGA window (if argument is FALSE).
375 static void VGA_SyncWindow( BOOL target_is_fb )
377 int size = VGA_WINDOW_SIZE;
379 /* Window does not overlap framebuffer. */
380 if (vga_fb_window >= vga_fb_size)
383 /* Check if window overlaps framebuffer only partially. */
384 if (vga_fb_size - vga_fb_window < VGA_WINDOW_SIZE)
385 size = vga_fb_size - vga_fb_window;
388 memmove( vga_fb_data + vga_fb_window, VGA_WINDOW_START, size );
390 memmove( VGA_WINDOW_START, vga_fb_data + vga_fb_window, size );
394 static void WINAPI VGA_DoExit(ULONG_PTR arg)
396 VGA_DeinstallTimer();
397 IDirectDrawSurface_SetPalette(lpddsurf,NULL);
398 IDirectDrawSurface_Release(lpddsurf);
400 IDirectDrawPalette_Release(lpddpal);
402 IDirectDraw_Release(lpddraw);
406 static void WINAPI VGA_DoSetMode(ULONG_PTR arg)
409 ModeSet *par = (ModeSet *)arg;
412 if (lpddraw) VGA_DoExit(0);
414 if (!pDirectDrawCreate)
416 HMODULE hmod = LoadLibraryA( "ddraw.dll" );
417 if (hmod) pDirectDrawCreate = (DirectDrawCreateProc)GetProcAddress( hmod, "DirectDrawCreate" );
418 if (!pDirectDrawCreate) {
419 ERR("Can't lookup DirectDrawCreate from ddraw.dll.\n");
423 res = pDirectDrawCreate(NULL,&lpddraw,NULL);
425 ERR("DirectDraw is not available (res = %lx)\n",res);
429 vga_hwnd = CreateWindowExA(0,"STATIC","WINEDOS VGA",
430 WS_POPUP|WS_VISIBLE|SS_NOTIFY,0,0,
431 par->Xres,par->Yres,0,0,0,NULL);
433 ERR("Failed to create user window.\n");
434 IDirectDraw_Release(lpddraw);
440 SetWindowPos(vga_hwnd,0,0,0,par->Xres,par->Yres,SWP_NOMOVE|SWP_NOZORDER);
442 if ((res=IDirectDraw_SetCooperativeLevel(lpddraw,vga_hwnd,DDSCL_FULLSCREEN|DDSCL_EXCLUSIVE))) {
443 ERR("Could not set cooperative level to exclusive (%lx)\n",res);
446 if ((res=IDirectDraw_SetDisplayMode(lpddraw,par->Xres,par->Yres,par->Depth))) {
447 ERR("DirectDraw does not support requested display mode (%dx%dx%d), res = %lx!\n",par->Xres,par->Yres,par->Depth,res);
448 IDirectDraw_Release(lpddraw);
453 res=IDirectDraw_CreatePalette(lpddraw,DDPCAPS_8BIT,NULL,&lpddpal,NULL);
455 ERR("Could not create palette (res = %lx)\n",res);
456 IDirectDraw_Release(lpddraw);
460 if ((res=IDirectDrawPalette_SetEntries(lpddpal,0,0,256,vga_def_palette))) {
461 ERR("Could not set default palette entries (res = %lx)\n", res);
464 memset(&sdesc,0,sizeof(sdesc));
465 sdesc.dwSize=sizeof(sdesc);
466 sdesc.dwFlags = DDSD_CAPS;
467 sdesc.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE;
468 if (IDirectDraw_CreateSurface(lpddraw,&sdesc,&lpddsurf,NULL)||(!lpddsurf)) {
469 ERR("DirectDraw surface is not available\n");
470 IDirectDraw_Release(lpddraw);
474 IDirectDrawSurface_SetPalette(lpddsurf,lpddpal);
475 vga_retrace_vertical = vga_retrace_horizontal = FALSE;
476 /* poll every 20ms (50fps should provide adequate responsiveness) */
477 VGA_InstallTimer(20);
483 int VGA_SetMode(unsigned Xres,unsigned Yres,unsigned Depth)
489 vga_fb_height = Yres;
490 vga_fb_depth = Depth;
492 vga_fb_pitch = Xres * ((Depth + 7) / 8);
494 newSize = Xres * Yres * ((Depth + 7) / 8);
495 if(newSize < 256 * 1024)
496 newSize = 256 * 1024;
498 if(vga_fb_size < newSize) {
500 HeapFree(GetProcessHeap(), 0, vga_fb_data);
501 vga_fb_data = HeapAlloc(GetProcessHeap(), 0, newSize);
502 vga_fb_size = newSize;
505 if(Xres >= 640 || Yres >= 480) {
513 VGA_SetWindowStart((Depth < 8) ? -1 : 0);
515 par.Depth = (Depth < 8) ? 8 : Depth;
517 MZ_RunInThread(VGA_DoSetMode, (ULONG_PTR)&par);
521 int VGA_GetMode(unsigned*Height,unsigned*Width,unsigned*Depth)
523 if (!lpddraw) return 1;
524 if (!lpddsurf) return 1;
525 if (Height) *Height=sdesc.dwHeight;
526 if (Width) *Width=sdesc.dwWidth;
527 if (Depth) *Depth=sdesc.ddpfPixelFormat.u1.dwRGBBitCount;
533 if (lpddraw) MZ_RunInThread(VGA_DoExit, 0);
536 void VGA_SetPalette(PALETTEENTRY*pal,int start,int len)
538 if (!lpddraw) return;
539 IDirectDrawPalette_SetEntries(lpddpal,0,start,len,pal);
542 /* set a single [char wide] color in 16 color mode. */
543 void VGA_SetColor16(int reg,int color)
547 if (!lpddraw) return;
548 pal= &vga_def64_palette[color];
549 IDirectDrawPalette_SetEntries(lpddpal,0,reg,1,pal);
550 vga_16_palette[reg]=(char)color;
553 /* Get a single [char wide] color in 16 color mode. */
554 char VGA_GetColor16(int reg)
557 if (!lpddraw) return 0;
558 return (char)vga_16_palette[reg];
561 /* set all 17 [char wide] colors at once in 16 color mode. */
562 void VGA_Set16Palette(char *Table)
567 if (!lpddraw) return; /* return if we're in text only mode */
568 memcpy( Table, &vga_16_palette, 17 ); /* copy the entries into the table */
570 for (c=0; c<17; c++) { /* 17 entries */
571 pal= &vga_def64_palette[(int)vga_16_palette[c]]; /* get color */
572 IDirectDrawPalette_SetEntries(lpddpal,0,c,1,pal); /* set entry */
573 TRACE("Palette register %d set to %d\n",c,(int)vga_16_palette[c]);
574 } /* end of the counting loop */
577 /* Get all 17 [ char wide ] colors at once in 16 color mode. */
578 void VGA_Get16Palette(char *Table)
581 if (!lpddraw) return; /* return if we're in text only mode */
582 memcpy( &vga_16_palette, Table, 17 ); /* copy the entries into the table */
585 void VGA_SetQuadPalette(RGBQUAD*color,int start,int len)
587 PALETTEENTRY pal[256];
590 if (!lpddraw) return;
591 for (c=0; c<len; c++) {
592 pal[c].peRed =color[c].rgbRed;
593 pal[c].peGreen=color[c].rgbGreen;
594 pal[c].peBlue =color[c].rgbBlue;
597 IDirectDrawPalette_SetEntries(lpddpal,0,start,len,pal);
600 LPSTR VGA_Lock(unsigned*Pitch,unsigned*Height,unsigned*Width,unsigned*Depth)
602 if (!lpddraw) return NULL;
603 if (!lpddsurf) return NULL;
604 if (IDirectDrawSurface_Lock(lpddsurf,NULL,&sdesc,0,0)) {
605 ERR("could not lock surface!\n");
608 if (Pitch) *Pitch=sdesc.u1.lPitch;
609 if (Height) *Height=sdesc.dwHeight;
610 if (Width) *Width=sdesc.dwWidth;
611 if (Depth) *Depth=sdesc.ddpfPixelFormat.u1.dwRGBBitCount;
612 return sdesc.lpSurface;
615 void VGA_Unlock(void)
617 IDirectDrawSurface_Unlock(lpddsurf,sdesc.lpSurface);
621 * Set start of 64k window at 0xa0000 in bytes.
622 * If value is -1, initialize color plane support.
623 * If value is >= 0, window contains direct copy of framebuffer.
625 void VGA_SetWindowStart(int start)
627 if(start == vga_fb_window)
630 EnterCriticalSection(&vga_lock);
632 if(vga_fb_window == -1)
633 FIXME("Remove VGA memory emulation.\n");
635 VGA_SyncWindow( TRUE );
637 vga_fb_window = start;
639 if(vga_fb_window == -1)
640 FIXME("Install VGA memory emulation.\n");
642 VGA_SyncWindow( FALSE );
644 LeaveCriticalSection(&vga_lock);
648 * Get start of 64k window at 0xa0000 in bytes.
649 * Value is -1 in color plane modes.
651 int VGA_GetWindowStart()
653 return vga_fb_window;
658 /* prepare the text mode video memory copy that is used to only
659 * update the video memory line that did get updated. */
660 void VGA_PrepareVideoMemCopy(unsigned Xres, unsigned Yres)
666 * Allocate space for char + attr.
668 vga_text_old = HeapReAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY,
669 vga_text_old, Xres * Yres * 2 );
671 p = VGA_AlphaBuffer();
674 /* make sure the video mem copy contains the exact opposite of our
675 * actual text mode memory area to make sure the screen
676 * does get updated fully initially */
677 for (i=0; i < Xres*Yres*2; i++)
678 *p2++ = *p++ ^ 0xff; /* XOR it */
681 /**********************************************************************
684 * Set VGA emulation to text mode.
686 void VGA_SetAlphaMode(unsigned Xres,unsigned Yres)
689 VGA_DeinstallTimer();
691 VGA_PrepareVideoMemCopy(Xres, Yres);
692 vga_text_width = Xres;
693 vga_text_height = Yres;
695 if (vga_text_x >= vga_text_width || vga_text_y >= vga_text_height)
696 VGA_SetCursorPos(0,0);
698 if(vga_text_console) {
702 SetConsoleScreenBufferSize( VGA_AlphaConsole(), size );
704 /* poll every 30ms (33fps should provide adequate responsiveness) */
705 VGA_InstallTimer(30);
709 /**********************************************************************
712 * Initialize VGA text mode handling and return default text mode.
713 * This function does not set VGA emulation to text mode.
715 void VGA_InitAlphaMode(unsigned*Xres,unsigned*Yres)
717 CONSOLE_SCREEN_BUFFER_INFO info;
719 if(GetConsoleScreenBufferInfo( VGA_AlphaConsole(), &info ))
721 vga_text_console = TRUE;
722 vga_text_x = info.dwCursorPosition.X;
723 vga_text_y = info.dwCursorPosition.Y;
724 vga_text_attr = info.wAttributes;
725 *Xres = info.dwSize.X;
726 *Yres = info.dwSize.Y;
730 vga_text_console = FALSE;
733 vga_text_attr = 0x0f;
739 /**********************************************************************
742 * Get current text mode. Returns TRUE and sets resolution if
743 * any VGA text mode has been initialized.
745 BOOL VGA_GetAlphaMode(unsigned*Xres,unsigned*Yres)
747 if (vga_text_width != 0 && vga_text_height != 0) {
748 *Xres = vga_text_width;
749 *Yres = vga_text_height;
755 void VGA_SetCursorShape(unsigned char start_options, unsigned char end)
757 CONSOLE_CURSOR_INFO cci;
759 /* standard cursor settings:
760 * 0x0607 == CGA, 0x0b0c == monochrome, 0x0d0e == EGA/VGA */
762 /* calculate percentage from bottom - assuming VGA (bottom 0x0e) */
763 cci.dwSize = ((end & 0x1f) - (start_options & 0x1f))/0x0e * 100;
764 if (!cci.dwSize) cci.dwSize++; /* NULL cursor would make SCCI() fail ! */
765 cci.bVisible = ((start_options & 0x60) != 0x20); /* invisible ? */
767 SetConsoleCursorInfo(VGA_AlphaConsole(),&cci);
770 void VGA_SetCursorPos(unsigned X,unsigned Y)
776 void VGA_GetCursorPos(unsigned*X,unsigned*Y)
778 if (X) *X = vga_text_x;
779 if (Y) *Y = vga_text_y;
782 static void VGA_PutCharAt(unsigned x, unsigned y, BYTE ascii, int attr)
784 char *dat = VGA_AlphaBuffer() + ((vga_text_width * y + x) * 2);
790 void VGA_WriteChars(unsigned X,unsigned Y,unsigned ch,int attr,int count)
792 EnterCriticalSection(&vga_lock);
795 VGA_PutCharAt(X + count, Y, ch, attr);
797 LeaveCriticalSection(&vga_lock);
800 void VGA_PutChar(BYTE ascii)
802 EnterCriticalSection(&vga_lock);
811 vga_text_x += ((vga_text_x + 8) & ~7) - vga_text_x;
827 VGA_PutCharAt(vga_text_x, vga_text_y, ascii, vga_text_attr);
831 if (vga_text_x >= vga_text_width)
837 if (vga_text_y >= vga_text_height)
839 vga_text_y = vga_text_height - 1;
840 VGA_ScrollUpText( 0, 0,
841 vga_text_height - 1, vga_text_width - 1,
846 * If we don't have a console, write directly to standard output.
848 if(!vga_text_console)
849 WriteFile(VGA_AlphaConsole(), &ascii, 1, NULL, NULL);
851 LeaveCriticalSection(&vga_lock);
854 void VGA_SetTextAttribute(BYTE attr)
856 vga_text_attr = attr;
859 void VGA_ClearText(unsigned row1, unsigned col1,
860 unsigned row2, unsigned col2,
865 EnterCriticalSection(&vga_lock);
867 for(y=row1; y<=row2; y++)
868 for(x=col1; x<=col2; x++)
869 VGA_PutCharAt(x, y, 0x20, attr);
871 LeaveCriticalSection(&vga_lock);
874 void VGA_ScrollUpText(unsigned row1, unsigned col1,
875 unsigned row2, unsigned col2,
876 unsigned lines, BYTE attr)
878 char *buffer = VGA_AlphaBuffer();
881 EnterCriticalSection(&vga_lock);
886 for (y = row1; y <= row2 - lines; y++)
887 memmove( buffer + col1 + y * vga_text_width * 2,
888 buffer + col1 + (y + lines) * vga_text_width * 2,
889 (col2 - col1 + 1) * 2 );
892 * Fill exposed lines.
894 for (y = max(row1, row2 - lines + 1); y <= row2; y++)
895 VGA_WriteChars( col1, y, ' ', attr, col2 - col1 + 1 );
897 LeaveCriticalSection(&vga_lock);
900 void VGA_ScrollDownText(unsigned row1, unsigned col1,
901 unsigned row2, unsigned col2,
902 unsigned lines, BYTE attr)
904 char *buffer = VGA_AlphaBuffer();
907 EnterCriticalSection(&vga_lock);
912 for (y = row2; y >= row1 + lines; y--)
913 memmove( buffer + col1 + y * vga_text_width * 2,
914 buffer + col1 + (y - lines) * vga_text_width * 2,
915 (col2 - col1 + 1) * 2 );
918 * Fill exposed lines.
920 for (y = row1; y <= min(row1 + lines - 1, row2); y++)
921 VGA_WriteChars( col1, y, ' ', attr, col2 - col1 + 1 );
923 LeaveCriticalSection(&vga_lock);
926 void VGA_GetCharacterAtCursor(BYTE *ascii, BYTE *attr)
930 dat = VGA_AlphaBuffer() + ((vga_text_width * vga_text_y + vga_text_x) * 2);
939 /* FIXME: optimize by doing this only if the data has actually changed
940 * (in a way similar to DIBSection, perhaps) */
941 static void VGA_Poll_Graphics(void)
943 unsigned int Pitch, Height, Width, X, Y;
945 char *dat = vga_fb_data + vga_fb_offset;
946 int bpp = (vga_fb_depth + 7) / 8;
948 surf = VGA_Lock(&Pitch,&Height,&Width,NULL);
952 * Synchronize framebuffer contents.
954 if (vga_fb_window != -1)
955 VGA_SyncWindow( TRUE );
958 * Double VGA framebuffer (320x200 -> 640x400), if needed.
960 if(Height >= 2 * vga_fb_height && Width >= 2 * vga_fb_width && bpp == 1)
961 for (Y=0; Y<vga_fb_height; Y++,surf+=Pitch*2,dat+=vga_fb_pitch)
962 for (X=0; X<vga_fb_width; X++) {
966 surf[X*2+Pitch] = value;
967 surf[X*2+Pitch+1] = value;
970 for (Y=0; Y<vga_fb_height; Y++,surf+=Pitch,dat+=vga_fb_pitch)
971 memcpy(surf, dat, vga_fb_width * bpp);
976 static void VGA_Poll_Text(void)
978 char *dat, *old, *p_line;
980 CHAR_INFO ch[256]; /* that should suffice for the largest text width */
983 HANDLE con = VGA_AlphaConsole();
984 BOOL linechanged = FALSE; /* video memory area differs from stored copy? */
986 /* Synchronize cursor position. */
989 SetConsoleCursorPosition(con,off);
991 dat = VGA_AlphaBuffer();
992 old = vga_text_old; /* pointer to stored video mem copy */
993 siz.X = vga_text_width; siz.Y = 1;
994 off.X = 0; off.Y = 0;
996 /* copy from virtual VGA frame buffer to console */
997 for (Y=0; Y<vga_text_height; Y++) {
998 linechanged = memcmp(dat, old, vga_text_width*2);
1001 /*TRACE("line %d changed\n", Y);*/
1003 for (X=0; X<vga_text_width; X++) {
1004 ch[X].Char.AsciiChar = *p_line++;
1005 /* WriteConsoleOutputA doesn't like "dead" chars */
1006 if (ch[X].Char.AsciiChar == '\0')
1007 ch[X].Char.AsciiChar = ' ';
1008 ch[X].Attributes = *p_line++;
1010 dest.Top=Y; dest.Bottom=Y;
1011 dest.Left=0; dest.Right=vga_text_width+1;
1012 WriteConsoleOutputA(con, ch, siz, off, &dest);
1013 memcpy(old, dat, vga_text_width*2);
1015 /* advance to next text line */
1016 dat += vga_text_width*2;
1017 old += vga_text_width*2;
1021 static void CALLBACK VGA_Poll( LPVOID arg, DWORD low, DWORD high )
1023 EnterCriticalSection(&vga_lock);
1026 VGA_Poll_Graphics();
1031 * Fake start of retrace.
1033 vga_retrace_vertical = TRUE;
1035 LeaveCriticalSection(&vga_lock);
1038 static BYTE palreg,palcnt;
1039 static PALETTEENTRY paldat;
1041 void VGA_ioport_out( WORD port, BYTE val )
1045 if (vga_address_3c0)
1046 vga_index_3c0 = val;
1048 FIXME("Unsupported index, register 0x3c0: 0x%02x (value 0x%02x)\n",
1049 vga_index_3c0, val);
1050 vga_address_3c0 = !vga_address_3c0;
1053 vga_index_3c4 = val;
1056 switch(vga_index_3c4) {
1057 case 0x04: /* Sequencer: Memory Mode Register */
1058 if(vga_fb_depth == 8)
1059 VGA_SetWindowStart((val & 8) ? 0 : -1);
1061 FIXME("Memory Mode Register not supported in this mode.\n");
1064 FIXME("Unsupported index, register 0x3c4: 0x%02x (value 0x%02x)\n",
1065 vga_index_3c4, val);
1069 palreg=val; palcnt=0; break;
1071 ((BYTE*)&paldat)[palcnt++]=val << 2;
1073 VGA_SetPalette(&paldat,palreg++,1);
1078 vga_index_3ce = val;
1081 FIXME("Unsupported index, register 0x3ce: 0x%02x (value 0x%02x)\n",
1082 vga_index_3ce, val);
1085 vga_index_3d4 = val;
1088 FIXME("Unsupported index, register 0x3d4: 0x%02x (value 0x%02x)\n",
1089 vga_index_3d4, val);
1092 FIXME("Unsupported VGA register: 0x%04x (value 0x%02x)\n", port, val);
1096 BYTE VGA_ioport_in( WORD port )
1102 FIXME("Unsupported index, register 0x3c0: 0x%02x\n",
1106 switch(vga_index_3c4) {
1107 case 0x04: /* Sequencer: Memory Mode Register */
1108 return (VGA_GetWindowStart() == -1) ? 0xf7 : 0xff;
1110 FIXME("Unsupported index, register 0x3c4: 0x%02x\n",
1115 FIXME("Unsupported index, register 0x3ce: 0x%02x\n",
1119 FIXME("Unsupported index, register 0x3d4: 0x%02x\n",
1125 * Read from this register resets register 0x3c0 address flip-flop.
1127 vga_address_3c0 = TRUE;
1130 * Read from this register returns following bits:
1131 * xxxx1xxx = Vertical retrace in progress if set.
1132 * xxxxx1xx = Light pen switched on.
1133 * xxxxxx1x = Light pen trigger set.
1134 * xxxxxxx1 = Either vertical or horizontal retrace
1135 * in progress if set.
1138 if (vga_retrace_vertical)
1140 if (vga_retrace_horizontal)
1144 * If VGA mode has been set, vertical retrace is
1145 * turned on once a frame and cleared after each read.
1146 * This might cause applications that synchronize with
1147 * vertical retrace to actually skip one frame but that
1148 * is probably not a problem.
1150 * If no VGA mode has been set, vertical retrace is faked
1151 * by toggling the value after every read.
1153 if (VGA_IsTimerRunning())
1154 vga_retrace_vertical = FALSE;
1156 vga_retrace_vertical = !vga_retrace_vertical;
1159 * Toggle horizontal retrace.
1161 vga_retrace_horizontal = !vga_retrace_horizontal;
1166 FIXME("Unsupported VGA register: 0x%04x\n", port);
1171 void VGA_Clean(void)
1174 VGA_DeinstallTimer();