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>
39 #include "wine/debug.h"
40 #include "wine/library.h"
42 WINE_DEFAULT_DEBUG_CHANNEL(xvidmode);
44 #ifdef SONAME_LIBXXF86VM
46 extern int usexvidmode;
48 static int xf86vm_event, xf86vm_error, xf86vm_major, xf86vm_minor;
50 #ifdef X_XF86VidModeSetGammaRamp
51 static int xf86vm_gammaramp_size;
52 static BOOL xf86vm_use_gammaramp;
53 #endif /* X_XF86VidModeSetGammaRamp */
55 static LPDDHALMODEINFO dd_modes;
56 static unsigned int dd_mode_count;
57 static XF86VidModeModeInfo** real_xf86vm_modes;
58 static unsigned int real_xf86vm_mode_count;
60 #define MAKE_FUNCPTR(f) static typeof(f) * p##f;
61 MAKE_FUNCPTR(XF86VidModeGetAllModeLines)
62 MAKE_FUNCPTR(XF86VidModeGetModeLine)
63 MAKE_FUNCPTR(XF86VidModeLockModeSwitch)
64 MAKE_FUNCPTR(XF86VidModeQueryExtension)
65 MAKE_FUNCPTR(XF86VidModeQueryVersion)
66 MAKE_FUNCPTR(XF86VidModeSetViewPort)
67 MAKE_FUNCPTR(XF86VidModeSwitchToMode)
68 #ifdef X_XF86VidModeSetGamma
69 MAKE_FUNCPTR(XF86VidModeGetGamma)
70 MAKE_FUNCPTR(XF86VidModeSetGamma)
72 #ifdef X_XF86VidModeSetGammaRamp
73 MAKE_FUNCPTR(XF86VidModeGetGammaRamp)
74 MAKE_FUNCPTR(XF86VidModeGetGammaRampSize)
75 MAKE_FUNCPTR(XF86VidModeSetGammaRamp)
80 static void convert_modeinfo( const XF86VidModeModeInfo *mode)
83 if (mode->htotal!=0 && mode->vtotal!=0)
84 rate = mode->dotclock * 1000 / (mode->htotal * mode->vtotal);
87 X11DRV_Settings_AddOneMode(mode->hdisplay, mode->vdisplay, 0, rate);
90 static void convert_modeline(int dotclock, const XF86VidModeModeLine *mode, LPDDHALMODEINFO info, unsigned int bpp)
92 info->dwWidth = mode->hdisplay;
93 info->dwHeight = mode->vdisplay;
94 if (mode->htotal!=0 && mode->vtotal!=0)
95 info->wRefreshRate = dotclock * 1000 / (mode->htotal * mode->vtotal);
97 info->wRefreshRate = 0;
98 TRACE(" width=%d, height=%d, refresh=%d\n",
99 info->dwWidth, info->dwHeight, info->wRefreshRate);
103 info->dwRBitMask = 0;
104 info->dwGBitMask = 0;
105 info->dwBBitMask = 0;
106 info->dwAlphaBitMask = 0;
109 static int XVidModeErrorHandler(Display *dpy, XErrorEvent *event, void *arg)
114 static int X11DRV_XF86VM_GetCurrentMode(void)
116 XF86VidModeModeLine line;
120 DWORD dwBpp = screen_bpp;
122 TRACE("Querying XVidMode current mode\n");
124 pXF86VidModeGetModeLine(gdi_display, DefaultScreen(gdi_display), &dotclock, &line);
126 convert_modeline(dotclock, &line, &cmode, dwBpp);
127 for (i=0; i<dd_mode_count; i++)
128 if (memcmp(&dd_modes[i], &cmode, sizeof(cmode)) == 0) {
129 TRACE("mode=%d\n", i);
132 ERR("In unknown mode, returning default\n");
136 static LONG X11DRV_XF86VM_SetCurrentMode(int mode)
138 DWORD dwBpp = screen_bpp;
139 /* only set modes from the original color depth */
140 if (dwBpp != dd_modes[mode].dwBPP)
142 FIXME("Cannot change screen BPP from %d to %d\n", dwBpp, dd_modes[mode].dwBPP);
144 mode = mode % real_xf86vm_mode_count;
147 TRACE("Resizing X display to %dx%d\n",
148 real_xf86vm_modes[mode]->hdisplay, real_xf86vm_modes[mode]->vdisplay);
149 pXF86VidModeSwitchToMode(gdi_display, DefaultScreen(gdi_display), real_xf86vm_modes[mode]);
150 #if 0 /* it is said that SetViewPort causes problems with some X servers */
151 pXF86VidModeSetViewPort(gdi_display, DefaultScreen(gdi_display), 0, 0);
153 XWarpPointer(gdi_display, None, DefaultRootWindow(gdi_display), 0, 0, 0, 0, 0, 0);
155 XSync(gdi_display, False);
157 X11DRV_resize_desktop( real_xf86vm_modes[mode]->hdisplay, real_xf86vm_modes[mode]->vdisplay );
158 return DISP_CHANGE_SUCCESSFUL;
162 void X11DRV_XF86VM_Init(void)
164 void *xvidmode_handle;
169 if (xf86vm_major) return; /* already initialized? */
171 xvidmode_handle = wine_dlopen(SONAME_LIBXXF86VM, RTLD_NOW, NULL, 0);
172 if (!xvidmode_handle)
174 TRACE("Unable to open %s, XVidMode disabled\n", SONAME_LIBXXF86VM);
179 #define LOAD_FUNCPTR(f) \
180 if((p##f = wine_dlsym(xvidmode_handle, #f, NULL, 0)) == NULL) \
182 LOAD_FUNCPTR(XF86VidModeGetAllModeLines)
183 LOAD_FUNCPTR(XF86VidModeGetModeLine)
184 LOAD_FUNCPTR(XF86VidModeLockModeSwitch)
185 LOAD_FUNCPTR(XF86VidModeQueryExtension)
186 LOAD_FUNCPTR(XF86VidModeQueryVersion)
187 LOAD_FUNCPTR(XF86VidModeSetViewPort)
188 LOAD_FUNCPTR(XF86VidModeSwitchToMode)
189 #ifdef X_XF86VidModeSetGamma
190 LOAD_FUNCPTR(XF86VidModeGetGamma)
191 LOAD_FUNCPTR(XF86VidModeSetGamma)
193 #ifdef X_XF86VidModeSetGammaRamp
194 LOAD_FUNCPTR(XF86VidModeGetGammaRamp)
195 LOAD_FUNCPTR(XF86VidModeGetGammaRampSize)
196 LOAD_FUNCPTR(XF86VidModeSetGammaRamp)
200 /* see if XVidMode is available */
202 ok = pXF86VidModeQueryExtension(gdi_display, &xf86vm_event, &xf86vm_error);
205 X11DRV_expect_error(gdi_display, XVidModeErrorHandler, NULL);
206 ok = pXF86VidModeQueryVersion(gdi_display, &xf86vm_major, &xf86vm_minor);
207 if (X11DRV_check_error()) ok = FALSE;
211 #ifdef X_XF86VidModeSetGammaRamp
212 if (xf86vm_major > 2 || (xf86vm_major == 2 && xf86vm_minor >= 1))
214 pXF86VidModeGetGammaRampSize(gdi_display, DefaultScreen(gdi_display),
215 &xf86vm_gammaramp_size);
216 if (xf86vm_gammaramp_size == 256)
217 xf86vm_use_gammaramp = TRUE;
219 #endif /* X_XF86VidModeSetGammaRamp */
222 if (usexvidmode && root_window == DefaultRootWindow( gdi_display ))
223 ok = pXF86VidModeGetAllModeLines(gdi_display, DefaultScreen(gdi_display), &nmodes, &real_xf86vm_modes);
225 ok = FALSE; /* In desktop mode, do not switch resolution... But still use the Gamma ramp stuff */
230 TRACE("XVidMode modes: count=%d\n", nmodes);
232 real_xf86vm_mode_count = nmodes;
234 dd_modes = X11DRV_Settings_SetHandlers("XF86VidMode",
235 X11DRV_XF86VM_GetCurrentMode,
236 X11DRV_XF86VM_SetCurrentMode,
239 /* convert modes to DDHALMODEINFO format */
240 for (i=0; i<real_xf86vm_mode_count; i++)
242 convert_modeinfo(real_xf86vm_modes[i]);
244 /* add modes for different color depths */
245 X11DRV_Settings_AddDepthModes();
246 dd_mode_count = X11DRV_Settings_GetModeCount();
248 TRACE("Available DD modes: count=%d\n", dd_mode_count);
249 TRACE("Enabling XVidMode\n");
253 TRACE("Unable to load function pointers from %s, XVidMode disabled\n", SONAME_LIBXXF86VM);
254 wine_dlclose(xvidmode_handle, NULL, 0);
255 xvidmode_handle = NULL;
259 void X11DRV_XF86VM_Cleanup(void)
262 if (real_xf86vm_modes) XFree(real_xf86vm_modes);
266 void X11DRV_XF86VM_SetExclusiveMode(int lock)
268 if (!dd_modes) return; /* no XVidMode */
271 pXF86VidModeLockModeSwitch(gdi_display, DefaultScreen(gdi_display), lock);
275 /***** GAMMA CONTROL *****/
276 /* (only available in XF86VidMode 2.x) */
278 #ifdef X_XF86VidModeSetGamma
280 static void GenerateRampFromGamma(WORD ramp[256], float gamma)
282 float r_gamma = 1/gamma;
284 TRACE("gamma is %f\n", r_gamma);
285 for (i=0; i<256; i++)
286 ramp[i] = pow(i/255.0, r_gamma) * 65535.0;
289 static BOOL ComputeGammaFromRamp(WORD ramp[256], float *gamma)
291 float r_x, r_y, r_lx, r_ly, r_d, r_v, r_e, g_avg, g_min, g_max;
292 unsigned i, f, l, g_n, c;
296 ERR("inverted or flat gamma ramp (%d->%d), rejected\n", f, l);
300 g_min = g_max = g_avg = 0.0;
301 /* check gamma ramp entries to estimate the gamma */
302 TRACE("analyzing gamma ramp (%d->%d)\n", f, l);
303 for (i=1, g_n=0; i<255; i++) {
304 if (ramp[i] < f || ramp[i] > l) {
305 ERR("strange gamma ramp ([%d]=%d for %d->%d), rejected\n", i, ramp[i], f, l);
309 if (!c) continue; /* avoid log(0) */
311 /* normalize entry values into 0..1 range */
312 r_x = i/255.0; r_y = c / r_d;
313 /* compute logarithms of values */
314 r_lx = log(r_x); r_ly = log(r_y);
315 /* compute gamma for this entry */
317 /* compute differential (error estimate) for this entry */
318 /* some games use table-based logarithms that magnifies the error by 128 */
319 r_e = -r_lx * 128 / (c * r_lx * r_lx);
321 /* compute min & max while compensating for estimated error */
322 if (!g_n || g_min > (r_v + r_e)) g_min = r_v + r_e;
323 if (!g_n || g_max < (r_v - r_e)) g_max = r_v - r_e;
328 /* TRACE("[%d]=%d, gamma=%f, error=%f\n", i, ramp[i], r_v, r_e); */
331 ERR("no gamma data, shouldn't happen\n");
335 TRACE("low bias is %d, high is %d, gamma is %5.3f\n", f, 65535-l, g_avg);
336 /* the bias could be because the app wanted something like a "red shift"
337 * like when you're hit in Quake, but XVidMode doesn't support it,
338 * so we have to reject a significant bias */
339 if (f && f > (pow(1/255.0, g_avg) * 65536.0)) {
340 ERR("low-biased gamma ramp (%d), rejected\n", f);
343 /* check that the gamma is reasonably uniform across the ramp */
344 if (g_max - g_min > 0.1) {
345 ERR("ramp not uniform (max=%f, min=%f, avg=%f), rejected\n", g_max, g_min, g_avg);
348 /* ok, now we're pretty sure we can set the desired gamma ramp,
354 #endif /* X_XF86VidModeSetGamma */
356 /* Hmm... should gamma control be available in desktop mode or not?
357 * I'll assume that it should */
359 static BOOL X11DRV_XF86VM_GetGammaRamp(LPDDGAMMARAMP ramp)
361 #ifdef X_XF86VidModeSetGamma
362 XF86VidModeGamma gamma;
365 if (xf86vm_major < 2) return FALSE; /* no gamma control */
366 #ifdef X_XF86VidModeSetGammaRamp
367 else if (xf86vm_use_gammaramp)
371 ret = pXF86VidModeGetGammaRamp(gdi_display, DefaultScreen(gdi_display), 256,
372 ramp->red, ramp->green, ramp->blue);
380 ret = pXF86VidModeGetGamma(gdi_display, DefaultScreen(gdi_display), &gamma);
383 GenerateRampFromGamma(ramp->red, gamma.red);
384 GenerateRampFromGamma(ramp->green, gamma.green);
385 GenerateRampFromGamma(ramp->blue, gamma.blue);
389 #endif /* X_XF86VidModeSetGamma */
393 static BOOL X11DRV_XF86VM_SetGammaRamp(LPDDGAMMARAMP ramp)
395 #ifdef X_XF86VidModeSetGamma
396 XF86VidModeGamma gamma;
398 if (xf86vm_major < 2) return FALSE; /* no gamma control */
399 #ifdef X_XF86VidModeSetGammaRamp
400 else if (xf86vm_use_gammaramp)
404 ret = pXF86VidModeSetGammaRamp(gdi_display, DefaultScreen(gdi_display), 256,
405 ramp->red, ramp->green, ramp->blue);
412 if (ComputeGammaFromRamp(ramp->red, &gamma.red) &&
413 ComputeGammaFromRamp(ramp->green, &gamma.green) &&
414 ComputeGammaFromRamp(ramp->blue, &gamma.blue)) {
417 ret = pXF86VidModeSetGamma(gdi_display, DefaultScreen(gdi_display), &gamma);
422 #endif /* X_XF86VidModeSetGamma */
426 #endif /* SONAME_LIBXXF86VM */
428 /***********************************************************************
429 * GetDeviceGammaRamp (X11DRV.@)
431 * FIXME: should move to somewhere appropriate, but probably not before
432 * the stuff in graphics/x11drv/ has been moved to dlls/x11drv, so that
433 * they can include xvidmode.h directly
435 BOOL X11DRV_GetDeviceGammaRamp(X11DRV_PDEVICE *physDev, LPVOID ramp)
437 #ifdef SONAME_LIBXXF86VM
438 return X11DRV_XF86VM_GetGammaRamp(ramp);
444 /***********************************************************************
445 * SetDeviceGammaRamp (X11DRV.@)
447 * FIXME: should move to somewhere appropriate, but probably not before
448 * the stuff in graphics/x11drv/ has been moved to dlls/x11drv, so that
449 * they can include xvidmode.h directly
451 BOOL X11DRV_SetDeviceGammaRamp(X11DRV_PDEVICE *physDev, LPVOID ramp)
453 #ifdef SONAME_LIBXXF86VM
454 return X11DRV_XF86VM_SetGammaRamp(ramp);