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
22 #include "wine/port.h"
30 #ifdef HAVE_X11_EXTENSIONS_XF86VMODE_H
31 #include <X11/extensions/xf86vmode.h>
33 #ifdef HAVE_X11_EXTENSIONS_XF86VMPROTO_H
34 #include <X11/extensions/xf86vmproto.h>
42 #include "wine/debug.h"
43 #include "wine/library.h"
45 WINE_DEFAULT_DEBUG_CHANNEL(xvidmode);
47 #ifdef SONAME_LIBXXF86VM
49 extern int usexvidmode;
51 static int xf86vm_event, xf86vm_error, xf86vm_major, xf86vm_minor;
53 #ifdef X_XF86VidModeSetGammaRamp
54 static int xf86vm_gammaramp_size;
55 static BOOL xf86vm_use_gammaramp;
56 #endif /* X_XF86VidModeSetGammaRamp */
58 static struct x11drv_mode_info *dd_modes;
59 static unsigned int dd_mode_count;
60 static XF86VidModeModeInfo** real_xf86vm_modes;
61 static unsigned int real_xf86vm_mode_count;
63 #define MAKE_FUNCPTR(f) static typeof(f) * p##f;
64 MAKE_FUNCPTR(XF86VidModeGetAllModeLines)
65 MAKE_FUNCPTR(XF86VidModeGetModeLine)
66 MAKE_FUNCPTR(XF86VidModeLockModeSwitch)
67 MAKE_FUNCPTR(XF86VidModeQueryExtension)
68 MAKE_FUNCPTR(XF86VidModeQueryVersion)
69 MAKE_FUNCPTR(XF86VidModeSetViewPort)
70 MAKE_FUNCPTR(XF86VidModeSwitchToMode)
71 #ifdef X_XF86VidModeSetGamma
72 MAKE_FUNCPTR(XF86VidModeGetGamma)
73 MAKE_FUNCPTR(XF86VidModeSetGamma)
75 #ifdef X_XF86VidModeSetGammaRamp
76 MAKE_FUNCPTR(XF86VidModeGetGammaRamp)
77 MAKE_FUNCPTR(XF86VidModeGetGammaRampSize)
78 MAKE_FUNCPTR(XF86VidModeSetGammaRamp)
83 static void convert_modeinfo( const XF86VidModeModeInfo *mode)
86 if (mode->htotal!=0 && mode->vtotal!=0)
87 rate = mode->dotclock * 1000 / (mode->htotal * mode->vtotal);
90 X11DRV_Settings_AddOneMode(mode->hdisplay, mode->vdisplay, 0, rate);
93 static void convert_modeline(int dotclock, const XF86VidModeModeLine *mode,
94 struct x11drv_mode_info *info, unsigned int bpp)
96 info->width = mode->hdisplay;
97 info->height = mode->vdisplay;
98 if (mode->htotal!=0 && mode->vtotal!=0)
99 info->refresh_rate = dotclock * 1000 / (mode->htotal * mode->vtotal);
101 info->refresh_rate = 0;
102 TRACE(" width=%d, height=%d, refresh=%d\n",
103 info->width, info->height, info->refresh_rate);
107 static int XVidModeErrorHandler(Display *dpy, XErrorEvent *event, void *arg)
112 static int X11DRV_XF86VM_GetCurrentMode(void)
114 XF86VidModeModeLine line;
117 struct x11drv_mode_info cmode;
118 DWORD dwBpp = screen_bpp;
120 TRACE("Querying XVidMode current mode\n");
122 pXF86VidModeGetModeLine(gdi_display, DefaultScreen(gdi_display), &dotclock, &line);
124 convert_modeline(dotclock, &line, &cmode, dwBpp);
125 for (i=0; i<dd_mode_count; i++)
126 if (memcmp(&dd_modes[i], &cmode, sizeof(cmode)) == 0) {
127 TRACE("mode=%d\n", i);
130 ERR("In unknown mode, returning default\n");
134 static LONG X11DRV_XF86VM_SetCurrentMode(int mode)
136 DWORD dwBpp = screen_bpp;
137 /* only set modes from the original color depth */
138 if (dwBpp != dd_modes[mode].bpp)
140 FIXME("Cannot change screen BPP from %d to %d\n", dwBpp, dd_modes[mode].bpp);
142 mode = mode % real_xf86vm_mode_count;
145 TRACE("Resizing X display to %dx%d\n",
146 real_xf86vm_modes[mode]->hdisplay, real_xf86vm_modes[mode]->vdisplay);
147 pXF86VidModeSwitchToMode(gdi_display, DefaultScreen(gdi_display), real_xf86vm_modes[mode]);
148 #if 0 /* it is said that SetViewPort causes problems with some X servers */
149 pXF86VidModeSetViewPort(gdi_display, DefaultScreen(gdi_display), 0, 0);
151 XWarpPointer(gdi_display, None, DefaultRootWindow(gdi_display), 0, 0, 0, 0, 0, 0);
153 XSync(gdi_display, False);
155 X11DRV_resize_desktop( real_xf86vm_modes[mode]->hdisplay, real_xf86vm_modes[mode]->vdisplay );
156 return DISP_CHANGE_SUCCESSFUL;
160 void X11DRV_XF86VM_Init(void)
162 void *xvidmode_handle;
167 if (xf86vm_major) return; /* already initialized? */
169 xvidmode_handle = wine_dlopen(SONAME_LIBXXF86VM, RTLD_NOW, NULL, 0);
170 if (!xvidmode_handle)
172 TRACE("Unable to open %s, XVidMode disabled\n", SONAME_LIBXXF86VM);
177 #define LOAD_FUNCPTR(f) \
178 if((p##f = wine_dlsym(xvidmode_handle, #f, NULL, 0)) == NULL) \
180 LOAD_FUNCPTR(XF86VidModeGetAllModeLines)
181 LOAD_FUNCPTR(XF86VidModeGetModeLine)
182 LOAD_FUNCPTR(XF86VidModeLockModeSwitch)
183 LOAD_FUNCPTR(XF86VidModeQueryExtension)
184 LOAD_FUNCPTR(XF86VidModeQueryVersion)
185 LOAD_FUNCPTR(XF86VidModeSetViewPort)
186 LOAD_FUNCPTR(XF86VidModeSwitchToMode)
187 #ifdef X_XF86VidModeSetGamma
188 LOAD_FUNCPTR(XF86VidModeGetGamma)
189 LOAD_FUNCPTR(XF86VidModeSetGamma)
191 #ifdef X_XF86VidModeSetGammaRamp
192 LOAD_FUNCPTR(XF86VidModeGetGammaRamp)
193 LOAD_FUNCPTR(XF86VidModeGetGammaRampSize)
194 LOAD_FUNCPTR(XF86VidModeSetGammaRamp)
198 /* see if XVidMode is available */
200 ok = pXF86VidModeQueryExtension(gdi_display, &xf86vm_event, &xf86vm_error);
204 X11DRV_expect_error(gdi_display, XVidModeErrorHandler, NULL);
205 ok = pXF86VidModeQueryVersion(gdi_display, &xf86vm_major, &xf86vm_minor);
206 if (X11DRV_check_error() || !ok) return;
208 #ifdef X_XF86VidModeSetGammaRamp
209 if (xf86vm_major > 2 || (xf86vm_major == 2 && xf86vm_minor >= 1))
211 X11DRV_expect_error(gdi_display, XVidModeErrorHandler, NULL);
212 pXF86VidModeGetGammaRampSize(gdi_display, DefaultScreen(gdi_display),
213 &xf86vm_gammaramp_size);
214 if (X11DRV_check_error()) xf86vm_gammaramp_size = 0;
215 if (xf86vm_gammaramp_size == 256)
216 xf86vm_use_gammaramp = TRUE;
218 #endif /* X_XF86VidModeSetGammaRamp */
221 if (usexvidmode && root_window == DefaultRootWindow( gdi_display ))
223 X11DRV_expect_error(gdi_display, XVidModeErrorHandler, NULL);
224 ok = pXF86VidModeGetAllModeLines(gdi_display, DefaultScreen(gdi_display), &nmodes, &real_xf86vm_modes);
225 if (X11DRV_check_error() || !ok) return;
227 else return; /* In desktop mode, do not switch resolution... But still use the Gamma ramp stuff */
229 TRACE("XVidMode modes: count=%d\n", nmodes);
231 real_xf86vm_mode_count = nmodes;
233 dd_modes = X11DRV_Settings_SetHandlers("XF86VidMode",
234 X11DRV_XF86VM_GetCurrentMode,
235 X11DRV_XF86VM_SetCurrentMode,
238 /* convert modes to x11drv_mode_info format */
239 for (i=0; i<real_xf86vm_mode_count; i++)
241 convert_modeinfo(real_xf86vm_modes[i]);
243 /* add modes for different color depths */
244 X11DRV_Settings_AddDepthModes();
245 dd_mode_count = X11DRV_Settings_GetModeCount();
247 TRACE("Available DD modes: count=%d\n", dd_mode_count);
248 TRACE("Enabling XVidMode\n");
252 TRACE("Unable to load function pointers from %s, XVidMode disabled\n", SONAME_LIBXXF86VM);
253 wine_dlclose(xvidmode_handle, NULL, 0);
254 xvidmode_handle = NULL;
258 void X11DRV_XF86VM_Cleanup(void)
261 if (real_xf86vm_modes) XFree(real_xf86vm_modes);
265 /***** GAMMA CONTROL *****/
266 /* (only available in XF86VidMode 2.x) */
268 #ifdef X_XF86VidModeSetGamma
270 static void GenerateRampFromGamma(WORD ramp[256], float gamma)
272 float r_gamma = 1/gamma;
274 TRACE("gamma is %f\n", r_gamma);
275 for (i=0; i<256; i++)
276 ramp[i] = pow(i/255.0, r_gamma) * 65535.0;
279 static BOOL ComputeGammaFromRamp(WORD ramp[256], float *gamma)
281 float r_x, r_y, r_lx, r_ly, r_d, r_v, r_e, g_avg, g_min, g_max;
282 unsigned i, f, l, g_n, c;
286 ERR("inverted or flat gamma ramp (%d->%d), rejected\n", f, l);
290 g_min = g_max = g_avg = 0.0;
291 /* check gamma ramp entries to estimate the gamma */
292 TRACE("analyzing gamma ramp (%d->%d)\n", f, l);
293 for (i=1, g_n=0; i<255; i++) {
294 if (ramp[i] < f || ramp[i] > l) {
295 ERR("strange gamma ramp ([%d]=%d for %d->%d), rejected\n", i, ramp[i], f, l);
299 if (!c) continue; /* avoid log(0) */
301 /* normalize entry values into 0..1 range */
302 r_x = i/255.0; r_y = c / r_d;
303 /* compute logarithms of values */
304 r_lx = log(r_x); r_ly = log(r_y);
305 /* compute gamma for this entry */
307 /* compute differential (error estimate) for this entry */
308 /* some games use table-based logarithms that magnifies the error by 128 */
309 r_e = -r_lx * 128 / (c * r_lx * r_lx);
311 /* compute min & max while compensating for estimated error */
312 if (!g_n || g_min > (r_v + r_e)) g_min = r_v + r_e;
313 if (!g_n || g_max < (r_v - r_e)) g_max = r_v - r_e;
318 /* TRACE("[%d]=%d, gamma=%f, error=%f\n", i, ramp[i], r_v, r_e); */
321 ERR("no gamma data, shouldn't happen\n");
325 TRACE("low bias is %d, high is %d, gamma is %5.3f\n", f, 65535-l, g_avg);
326 /* the bias could be because the app wanted something like a "red shift"
327 * like when you're hit in Quake, but XVidMode doesn't support it,
328 * so we have to reject a significant bias */
329 if (f && f > (pow(1/255.0, g_avg) * 65536.0)) {
330 ERR("low-biased gamma ramp (%d), rejected\n", f);
333 /* check that the gamma is reasonably uniform across the ramp */
334 if (g_max - g_min > 12.8) {
335 ERR("ramp not uniform (max=%f, min=%f, avg=%f), rejected\n", g_max, g_min, g_avg);
338 /* check that the gamma is not too bright */
340 ERR("too bright gamma ( %5.3f), rejected\n", g_avg);
343 /* ok, now we're pretty sure we can set the desired gamma ramp,
349 #endif /* X_XF86VidModeSetGamma */
351 /* Hmm... should gamma control be available in desktop mode or not?
352 * I'll assume that it should */
354 static BOOL X11DRV_XF86VM_GetGammaRamp(LPDDGAMMARAMP ramp)
356 #ifdef X_XF86VidModeSetGamma
357 XF86VidModeGamma gamma;
360 if (xf86vm_major < 2) return FALSE; /* no gamma control */
361 #ifdef X_XF86VidModeSetGammaRamp
362 else if (xf86vm_use_gammaramp)
366 ret = pXF86VidModeGetGammaRamp(gdi_display, DefaultScreen(gdi_display), 256,
367 ramp->red, ramp->green, ramp->blue);
375 ret = pXF86VidModeGetGamma(gdi_display, DefaultScreen(gdi_display), &gamma);
378 GenerateRampFromGamma(ramp->red, gamma.red);
379 GenerateRampFromGamma(ramp->green, gamma.green);
380 GenerateRampFromGamma(ramp->blue, gamma.blue);
384 #endif /* X_XF86VidModeSetGamma */
388 static BOOL X11DRV_XF86VM_SetGammaRamp(LPDDGAMMARAMP ramp)
391 #ifdef X_XF86VidModeSetGamma
392 XF86VidModeGamma gamma;
394 if (xf86vm_major < 2 || !usexvidmode) return FALSE; /* no gamma control */
395 if (!ComputeGammaFromRamp(ramp->red, &gamma.red) || /* ramp validation */
396 !ComputeGammaFromRamp(ramp->green, &gamma.green) ||
397 !ComputeGammaFromRamp(ramp->blue, &gamma.blue)) return FALSE;
399 #ifdef X_XF86VidModeSetGammaRamp
400 if (xf86vm_use_gammaramp)
401 ret = pXF86VidModeSetGammaRamp(gdi_display, DefaultScreen(gdi_display), 256,
402 ramp->red, ramp->green, ramp->blue);
405 ret = pXF86VidModeSetGamma(gdi_display, DefaultScreen(gdi_display), &gamma);
407 #endif /* X_XF86VidModeSetGamma */
411 #endif /* SONAME_LIBXXF86VM */
413 /***********************************************************************
414 * GetDeviceGammaRamp (X11DRV.@)
416 * FIXME: should move to somewhere appropriate, but probably not before
417 * the stuff in graphics/x11drv/ has been moved to dlls/x11drv, so that
418 * they can include xvidmode.h directly
420 BOOL X11DRV_GetDeviceGammaRamp(PHYSDEV dev, LPVOID ramp)
422 #ifdef SONAME_LIBXXF86VM
423 return X11DRV_XF86VM_GetGammaRamp(ramp);
429 /***********************************************************************
430 * SetDeviceGammaRamp (X11DRV.@)
432 * FIXME: should move to somewhere appropriate, but probably not before
433 * the stuff in graphics/x11drv/ has been moved to dlls/x11drv, so that
434 * they can include xvidmode.h directly
436 BOOL X11DRV_SetDeviceGammaRamp(PHYSDEV dev, LPVOID ramp)
438 #ifdef SONAME_LIBXXF86VM
439 return X11DRV_XF86VM_SetGammaRamp(ramp);