2 * DirectDraw XVidMode interface
4 * Copyright 2001 TransGaming Technologies, Inc.
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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
28 #ifdef HAVE_LIBXXF86VM
29 #include <X11/extensions/xf86vmode.h>
30 #endif /* HAVE_LIBXXF86VM */
37 #include "wine/debug.h"
39 WINE_DEFAULT_DEBUG_CHANNEL(xvidmode
);
41 #ifdef HAVE_LIBXXF86VM
43 extern int usexvidmode
;
45 static int xf86vm_event
, xf86vm_error
, xf86vm_major
, xf86vm_minor
;
47 #ifdef X_XF86VidModeSetGammaRamp
48 static int xf86vm_gammaramp_size
;
49 static BOOL xf86vm_use_gammaramp
;
50 #endif /* X_XF86VidModeSetGammaRamp */
52 static LPDDHALMODEINFO dd_modes
;
53 static unsigned int dd_mode_count
;
54 static XF86VidModeModeInfo
** real_xf86vm_modes
;
55 static unsigned int real_xf86vm_mode_count
;
57 static void convert_modeinfo( const XF86VidModeModeInfo
*mode
)
60 if (mode
->htotal
!=0 && mode
->vtotal
!=0)
61 rate
= mode
->dotclock
* 1000 / (mode
->htotal
* mode
->vtotal
);
64 X11DRV_Settings_AddOneMode(mode
->hdisplay
, mode
->vdisplay
, 0, rate
);
67 static void convert_modeline(int dotclock
, const XF86VidModeModeLine
*mode
, LPDDHALMODEINFO info
, unsigned int bpp
)
69 info
->dwWidth
= mode
->hdisplay
;
70 info
->dwHeight
= mode
->vdisplay
;
71 if (mode
->htotal
!=0 && mode
->vtotal
!=0)
72 info
->wRefreshRate
= dotclock
* 1000 / (mode
->htotal
* mode
->vtotal
);
74 info
->wRefreshRate
= 0;
75 TRACE(" width=%d, height=%d, refresh=%d\n",
76 info
->dwWidth
, info
->dwHeight
, info
->wRefreshRate
);
83 info
->dwAlphaBitMask
= 0;
86 static int XVidModeErrorHandler(Display
*dpy
, XErrorEvent
*event
, void *arg
)
91 static int X11DRV_XF86VM_GetCurrentMode(void)
93 XF86VidModeModeLine line
;
97 DWORD dwBpp
= screen_bpp
;
99 TRACE("Querying XVidMode current mode\n");
101 XF86VidModeGetModeLine(gdi_display
, DefaultScreen(gdi_display
), &dotclock
, &line
);
103 convert_modeline(dotclock
, &line
, &cmode
, dwBpp
);
104 for (i
=0; i
<dd_mode_count
; i
++)
105 if (memcmp(&dd_modes
[i
], &cmode
, sizeof(cmode
)) == 0) {
106 TRACE("mode=%d\n", i
);
109 ERR("In unknown mode, returning default\n");
113 static LONG
X11DRV_XF86VM_SetCurrentMode(int mode
)
115 DWORD dwBpp
= screen_bpp
;
116 /* only set modes from the original color depth */
117 if (dwBpp
!= dd_modes
[mode
].dwBPP
)
119 FIXME("Cannot change screen BPP from %d to %d\n", dwBpp
, dd_modes
[mode
].dwBPP
);
121 mode
= mode
% real_xf86vm_mode_count
;
124 TRACE("Resizing X display to %dx%d\n",
125 real_xf86vm_modes
[mode
]->hdisplay
, real_xf86vm_modes
[mode
]->vdisplay
);
126 XF86VidModeSwitchToMode(gdi_display
, DefaultScreen(gdi_display
), real_xf86vm_modes
[mode
]);
127 #if 0 /* it is said that SetViewPort causes problems with some X servers */
128 XF86VidModeSetViewPort(gdi_display
, DefaultScreen(gdi_display
), 0, 0);
130 XWarpPointer(gdi_display
, None
, DefaultRootWindow(gdi_display
), 0, 0, 0, 0, 0, 0);
132 XSync(gdi_display
, False
);
134 X11DRV_handle_desktop_resize( real_xf86vm_modes
[mode
]->hdisplay
,
135 real_xf86vm_modes
[mode
]->vdisplay
);
136 return DISP_CHANGE_SUCCESSFUL
;
139 void X11DRV_XF86VM_Init(void)
145 if (xf86vm_major
) return; /* already initialized? */
147 /* see if XVidMode is available */
149 ok
= XF86VidModeQueryExtension(gdi_display
, &xf86vm_event
, &xf86vm_error
);
152 X11DRV_expect_error(gdi_display
, XVidModeErrorHandler
, NULL
);
153 ok
= XF86VidModeQueryVersion(gdi_display
, &xf86vm_major
, &xf86vm_minor
);
154 if (X11DRV_check_error()) ok
= FALSE
;
158 #ifdef X_XF86VidModeSetGammaRamp
159 if (xf86vm_major
> 2 || (xf86vm_major
== 2 && xf86vm_minor
>= 1))
161 XF86VidModeGetGammaRampSize(gdi_display
, DefaultScreen(gdi_display
),
162 &xf86vm_gammaramp_size
);
163 if (xf86vm_gammaramp_size
== 256)
164 xf86vm_use_gammaramp
= TRUE
;
166 #endif /* X_XF86VidModeSetGammaRamp */
169 if (usexvidmode
&& root_window
== DefaultRootWindow( gdi_display
))
170 ok
= XF86VidModeGetAllModeLines(gdi_display
, DefaultScreen(gdi_display
), &nmodes
, &real_xf86vm_modes
);
172 ok
= FALSE
; /* In desktop mode, do not switch resolution... But still use the Gamma ramp stuff */
177 TRACE("XVidMode modes: count=%d\n", nmodes
);
179 real_xf86vm_mode_count
= nmodes
;
181 dd_modes
= X11DRV_Settings_SetHandlers("XF86VidMode",
182 X11DRV_XF86VM_GetCurrentMode
,
183 X11DRV_XF86VM_SetCurrentMode
,
186 /* convert modes to DDHALMODEINFO format */
187 for (i
=0; i
<real_xf86vm_mode_count
; i
++)
189 convert_modeinfo(real_xf86vm_modes
[i
]);
191 /* add modes for different color depths */
192 X11DRV_Settings_AddDepthModes();
193 dd_mode_count
= X11DRV_Settings_GetModeCount();
195 TRACE("Available DD modes: count=%d\n", dd_mode_count
);
196 TRACE("Enabling XVidMode\n");
199 void X11DRV_XF86VM_Cleanup(void)
202 if (real_xf86vm_modes
) XFree(real_xf86vm_modes
);
206 void X11DRV_XF86VM_SetExclusiveMode(int lock
)
208 if (!dd_modes
) return; /* no XVidMode */
211 XF86VidModeLockModeSwitch(gdi_display
, DefaultScreen(gdi_display
), lock
);
215 /***** GAMMA CONTROL *****/
216 /* (only available in XF86VidMode 2.x) */
218 #ifdef X_XF86VidModeSetGamma
220 static void GenerateRampFromGamma(WORD ramp
[256], float gamma
)
222 float r_gamma
= 1/gamma
;
224 TRACE("gamma is %f\n", r_gamma
);
225 for (i
=0; i
<256; i
++)
226 ramp
[i
] = pow(i
/255.0, r_gamma
) * 65535.0;
229 static BOOL
ComputeGammaFromRamp(WORD ramp
[256], float *gamma
)
231 float r_x
, r_y
, r_lx
, r_ly
, r_d
, r_v
, r_e
, g_avg
, g_min
, g_max
;
232 unsigned i
, f
, l
, g_n
, c
;
236 ERR("inverted or flat gamma ramp (%d->%d), rejected\n", f
, l
);
240 g_min
= g_max
= g_avg
= 0.0;
241 /* check gamma ramp entries to estimate the gamma */
242 TRACE("analyzing gamma ramp (%d->%d)\n", f
, l
);
243 for (i
=1, g_n
=0; i
<255; i
++) {
244 if (ramp
[i
] < f
|| ramp
[i
] > l
) {
245 ERR("strange gamma ramp ([%d]=%d for %d->%d), rejected\n", i
, ramp
[i
], f
, l
);
249 if (!c
) continue; /* avoid log(0) */
251 /* normalize entry values into 0..1 range */
252 r_x
= i
/255.0; r_y
= c
/ r_d
;
253 /* compute logarithms of values */
254 r_lx
= log(r_x
); r_ly
= log(r_y
);
255 /* compute gamma for this entry */
257 /* compute differential (error estimate) for this entry */
258 /* some games use table-based logarithms that magnifies the error by 128 */
259 r_e
= -r_lx
* 128 / (c
* r_lx
* r_lx
);
261 /* compute min & max while compensating for estimated error */
262 if (!g_n
|| g_min
> (r_v
+ r_e
)) g_min
= r_v
+ r_e
;
263 if (!g_n
|| g_max
< (r_v
- r_e
)) g_max
= r_v
- r_e
;
268 /* TRACE("[%d]=%d, gamma=%f, error=%f\n", i, ramp[i], r_v, r_e); */
271 ERR("no gamma data, shouldn't happen\n");
275 TRACE("low bias is %d, high is %d, gamma is %5.3f\n", f
, 65535-l
, g_avg
);
276 /* the bias could be because the app wanted something like a "red shift"
277 * like when you're hit in Quake, but XVidMode doesn't support it,
278 * so we have to reject a significant bias */
279 if (f
&& f
> (pow(1/255.0, g_avg
) * 65536.0)) {
280 ERR("low-biased gamma ramp (%d), rejected\n", f
);
283 /* check that the gamma is reasonably uniform across the ramp */
284 if (g_max
- g_min
> 0.1) {
285 ERR("ramp not uniform (max=%f, min=%f, avg=%f), rejected\n", g_max
, g_min
, g_avg
);
288 /* ok, now we're pretty sure we can set the desired gamma ramp,
294 #endif /* X_XF86VidModeSetGamma */
296 /* Hmm... should gamma control be available in desktop mode or not?
297 * I'll assume that it should */
299 BOOL
X11DRV_XF86VM_GetGammaRamp(LPDDGAMMARAMP ramp
)
301 #ifdef X_XF86VidModeSetGamma
302 XF86VidModeGamma gamma
;
305 if (xf86vm_major
< 2) return FALSE
; /* no gamma control */
306 #ifdef X_XF86VidModeSetGammaRamp
307 else if (xf86vm_use_gammaramp
)
311 ret
= XF86VidModeGetGammaRamp(gdi_display
, DefaultScreen(gdi_display
), 256,
312 ramp
->red
, ramp
->green
, ramp
->blue
);
320 ret
= XF86VidModeGetGamma(gdi_display
, DefaultScreen(gdi_display
), &gamma
);
323 GenerateRampFromGamma(ramp
->red
, gamma
.red
);
324 GenerateRampFromGamma(ramp
->green
, gamma
.green
);
325 GenerateRampFromGamma(ramp
->blue
, gamma
.blue
);
329 #endif /* X_XF86VidModeSetGamma */
333 BOOL
X11DRV_XF86VM_SetGammaRamp(LPDDGAMMARAMP ramp
)
335 #ifdef X_XF86VidModeSetGamma
336 XF86VidModeGamma gamma
;
338 if (xf86vm_major
< 2) return FALSE
; /* no gamma control */
339 #ifdef X_XF86VidModeSetGammaRamp
340 else if (xf86vm_use_gammaramp
)
344 ret
= XF86VidModeSetGammaRamp(gdi_display
, DefaultScreen(gdi_display
), 256,
345 ramp
->red
, ramp
->green
, ramp
->blue
);
352 if (ComputeGammaFromRamp(ramp
->red
, &gamma
.red
) &&
353 ComputeGammaFromRamp(ramp
->green
, &gamma
.green
) &&
354 ComputeGammaFromRamp(ramp
->blue
, &gamma
.blue
)) {
357 ret
= XF86VidModeSetGamma(gdi_display
, DefaultScreen(gdi_display
), &gamma
);
362 #endif /* X_XF86VidModeSetGamma */
366 #endif /* HAVE_LIBXXF86VM */
368 /***********************************************************************
369 * GetDeviceGammaRamp (X11DRV.@)
371 * FIXME: should move to somewhere appropriate, but probably not before
372 * the stuff in graphics/x11drv/ has been moved to dlls/x11drv, so that
373 * they can include xvidmode.h directly
375 BOOL
X11DRV_GetDeviceGammaRamp(X11DRV_PDEVICE
*physDev
, LPVOID ramp
)
377 #ifdef HAVE_LIBXXF86VM
378 return X11DRV_XF86VM_GetGammaRamp(ramp
);
384 /***********************************************************************
385 * SetDeviceGammaRamp (X11DRV.@)
387 * FIXME: should move to somewhere appropriate, but probably not before
388 * the stuff in graphics/x11drv/ has been moved to dlls/x11drv, so that
389 * they can include xvidmode.h directly
391 BOOL
X11DRV_SetDeviceGammaRamp(X11DRV_PDEVICE
*physDev
, LPVOID ramp
)
393 #ifdef HAVE_LIBXXF86VM
394 return X11DRV_XF86VM_SetGammaRamp(ramp
);