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_depth;
98 if (dwBpp == 24) dwBpp = 32;
100 TRACE("Querying XVidMode current mode\n");
102 XF86VidModeGetModeLine(gdi_display, DefaultScreen(gdi_display), &dotclock, &line);
104 convert_modeline(dotclock, &line, &cmode, dwBpp);
105 for (i=0; i<dd_mode_count; i++)
106 if (memcmp(&dd_modes[i], &cmode, sizeof(cmode)) == 0) {
107 TRACE("mode=%d\n", i);
110 ERR("In unknown mode, returning default\n");
114 static LONG X11DRV_XF86VM_SetCurrentMode(int mode)
116 DWORD dwBpp = screen_depth;
117 if (dwBpp == 24) dwBpp = 32;
118 /* only set modes from the original color depth */
119 if (dwBpp != dd_modes[mode].dwBPP)
121 FIXME("Cannot change screen BPP from %d to %d\n", dwBpp, dd_modes[mode].dwBPP);
123 mode = mode % real_xf86vm_mode_count;
126 TRACE("Resizing X display to %dx%d\n",
127 real_xf86vm_modes[mode]->hdisplay, real_xf86vm_modes[mode]->vdisplay);
128 XF86VidModeSwitchToMode(gdi_display, DefaultScreen(gdi_display), real_xf86vm_modes[mode]);
129 #if 0 /* it is said that SetViewPort causes problems with some X servers */
130 XF86VidModeSetViewPort(gdi_display, DefaultScreen(gdi_display), 0, 0);
132 XWarpPointer(gdi_display, None, DefaultRootWindow(gdi_display), 0, 0, 0, 0, 0, 0);
134 XSync(gdi_display, False);
136 X11DRV_handle_desktop_resize( real_xf86vm_modes[mode]->hdisplay,
137 real_xf86vm_modes[mode]->vdisplay );
138 return DISP_CHANGE_SUCCESSFUL;
141 void X11DRV_XF86VM_Init(void)
147 if (xf86vm_major) return; /* already initialized? */
149 /* see if XVidMode is available */
151 ok = XF86VidModeQueryExtension(gdi_display, &xf86vm_event, &xf86vm_error);
154 X11DRV_expect_error(gdi_display, XVidModeErrorHandler, NULL);
155 ok = XF86VidModeQueryVersion(gdi_display, &xf86vm_major, &xf86vm_minor);
156 if (X11DRV_check_error()) ok = FALSE;
160 #ifdef X_XF86VidModeSetGammaRamp
161 if (xf86vm_major > 2 || (xf86vm_major == 2 && xf86vm_minor >= 1))
163 XF86VidModeGetGammaRampSize(gdi_display, DefaultScreen(gdi_display),
164 &xf86vm_gammaramp_size);
165 if (xf86vm_gammaramp_size == 256)
166 xf86vm_use_gammaramp = TRUE;
168 #endif /* X_XF86VidModeSetGammaRamp */
171 if (usexvidmode && root_window == DefaultRootWindow( gdi_display ))
172 ok = XF86VidModeGetAllModeLines(gdi_display, DefaultScreen(gdi_display), &nmodes, &real_xf86vm_modes);
174 ok = FALSE; /* In desktop mode, do not switch resolution... But still use the Gamma ramp stuff */
179 TRACE("XVidMode modes: count=%d\n", nmodes);
181 real_xf86vm_mode_count = nmodes;
183 dd_modes = X11DRV_Settings_SetHandlers("XF86VidMode",
184 X11DRV_XF86VM_GetCurrentMode,
185 X11DRV_XF86VM_SetCurrentMode,
188 /* convert modes to DDHALMODEINFO format */
189 for (i=0; i<real_xf86vm_mode_count; i++)
191 convert_modeinfo(real_xf86vm_modes[i]);
193 /* add modes for different color depths */
194 X11DRV_Settings_AddDepthModes();
195 dd_mode_count = X11DRV_Settings_GetModeCount();
197 TRACE("Available DD modes: count=%d\n", dd_mode_count);
198 TRACE("Enabling XVidMode\n");
201 void X11DRV_XF86VM_Cleanup(void)
204 if (real_xf86vm_modes) XFree(real_xf86vm_modes);
208 void X11DRV_XF86VM_SetExclusiveMode(int lock)
210 if (!dd_modes) return; /* no XVidMode */
213 XF86VidModeLockModeSwitch(gdi_display, DefaultScreen(gdi_display), lock);
217 /***** GAMMA CONTROL *****/
218 /* (only available in XF86VidMode 2.x) */
220 #ifdef X_XF86VidModeSetGamma
222 static void GenerateRampFromGamma(WORD ramp[256], float gamma)
224 float r_gamma = 1/gamma;
226 TRACE("gamma is %f\n", r_gamma);
227 for (i=0; i<256; i++)
228 ramp[i] = pow(i/255.0, r_gamma) * 65535.0;
231 static BOOL ComputeGammaFromRamp(WORD ramp[256], float *gamma)
233 float r_x, r_y, r_lx, r_ly, r_d, r_v, r_e, g_avg, g_min, g_max;
234 unsigned i, f, l, g_n, c;
238 ERR("inverted or flat gamma ramp (%d->%d), rejected\n", f, l);
242 g_min = g_max = g_avg = 0.0;
243 /* check gamma ramp entries to estimate the gamma */
244 TRACE("analyzing gamma ramp (%d->%d)\n", f, l);
245 for (i=1, g_n=0; i<255; i++) {
246 if (ramp[i] < f || ramp[i] > l) {
247 ERR("strange gamma ramp ([%d]=%d for %d->%d), rejected\n", i, ramp[i], f, l);
251 if (!c) continue; /* avoid log(0) */
253 /* normalize entry values into 0..1 range */
254 r_x = i/255.0; r_y = c / r_d;
255 /* compute logarithms of values */
256 r_lx = log(r_x); r_ly = log(r_y);
257 /* compute gamma for this entry */
259 /* compute differential (error estimate) for this entry */
260 /* some games use table-based logarithms that magnifies the error by 128 */
261 r_e = -r_lx * 128 / (c * r_lx * r_lx);
263 /* compute min & max while compensating for estimated error */
264 if (!g_n || g_min > (r_v + r_e)) g_min = r_v + r_e;
265 if (!g_n || g_max < (r_v - r_e)) g_max = r_v - r_e;
270 /* TRACE("[%d]=%d, gamma=%f, error=%f\n", i, ramp[i], r_v, r_e); */
273 ERR("no gamma data, shouldn't happen\n");
277 TRACE("low bias is %d, high is %d, gamma is %5.3f\n", f, 65535-l, g_avg);
278 /* the bias could be because the app wanted something like a "red shift"
279 * like when you're hit in Quake, but XVidMode doesn't support it,
280 * so we have to reject a significant bias */
281 if (f && f > (pow(1/255.0, g_avg) * 65536.0)) {
282 ERR("low-biased gamma ramp (%d), rejected\n", f);
285 /* check that the gamma is reasonably uniform across the ramp */
286 if (g_max - g_min > 0.1) {
287 ERR("ramp not uniform (max=%f, min=%f, avg=%f), rejected\n", g_max, g_min, g_avg);
290 /* ok, now we're pretty sure we can set the desired gamma ramp,
296 #endif /* X_XF86VidModeSetGamma */
298 /* Hmm... should gamma control be available in desktop mode or not?
299 * I'll assume that it should */
301 BOOL X11DRV_XF86VM_GetGammaRamp(LPDDGAMMARAMP ramp)
303 #ifdef X_XF86VidModeSetGamma
304 XF86VidModeGamma gamma;
307 if (xf86vm_major < 2) return FALSE; /* no gamma control */
308 #ifdef X_XF86VidModeSetGammaRamp
309 else if (xf86vm_use_gammaramp)
313 ret = XF86VidModeGetGammaRamp(gdi_display, DefaultScreen(gdi_display), 256,
314 ramp->red, ramp->green, ramp->blue);
322 ret = XF86VidModeGetGamma(gdi_display, DefaultScreen(gdi_display), &gamma);
325 GenerateRampFromGamma(ramp->red, gamma.red);
326 GenerateRampFromGamma(ramp->green, gamma.green);
327 GenerateRampFromGamma(ramp->blue, gamma.blue);
331 #endif /* X_XF86VidModeSetGamma */
335 BOOL X11DRV_XF86VM_SetGammaRamp(LPDDGAMMARAMP ramp)
337 #ifdef X_XF86VidModeSetGamma
338 XF86VidModeGamma gamma;
340 if (xf86vm_major < 2) return FALSE; /* no gamma control */
341 #ifdef X_XF86VidModeSetGammaRamp
342 else if (xf86vm_use_gammaramp)
346 ret = XF86VidModeSetGammaRamp(gdi_display, DefaultScreen(gdi_display), 256,
347 ramp->red, ramp->green, ramp->blue);
354 if (ComputeGammaFromRamp(ramp->red, &gamma.red) &&
355 ComputeGammaFromRamp(ramp->green, &gamma.green) &&
356 ComputeGammaFromRamp(ramp->blue, &gamma.blue)) {
359 ret = XF86VidModeSetGamma(gdi_display, DefaultScreen(gdi_display), &gamma);
364 #endif /* X_XF86VidModeSetGamma */
368 #endif /* HAVE_LIBXXF86VM */
370 /***********************************************************************
371 * GetDeviceGammaRamp (X11DRV.@)
373 * FIXME: should move to somewhere appropriate, but probably not before
374 * the stuff in graphics/x11drv/ has been moved to dlls/x11drv, so that
375 * they can include xvidmode.h directly
377 BOOL X11DRV_GetDeviceGammaRamp(X11DRV_PDEVICE *physDev, LPVOID ramp)
379 #ifdef HAVE_LIBXXF86VM
380 return X11DRV_XF86VM_GetGammaRamp(ramp);
386 /***********************************************************************
387 * SetDeviceGammaRamp (X11DRV.@)
389 * FIXME: should move to somewhere appropriate, but probably not before
390 * the stuff in graphics/x11drv/ has been moved to dlls/x11drv, so that
391 * they can include xvidmode.h directly
393 BOOL X11DRV_SetDeviceGammaRamp(X11DRV_PDEVICE *physDev, LPVOID ramp)
395 #ifdef HAVE_LIBXXF86VM
396 return X11DRV_XF86VM_SetGammaRamp(ramp);