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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
27 #ifdef HAVE_LIBXXF86VM
30 #include <X11/extensions/xf86vmode.h>
31 #endif /* HAVE_LIBXXF86VM */
40 #include "wine/debug.h"
42 WINE_DEFAULT_DEBUG_CHANNEL(xvidmode);
44 #ifdef HAVE_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;
59 static unsigned int xf86vm_initial_mode = 0;
61 static void convert_modeinfo( const XF86VidModeModeInfo *mode)
64 if (mode->htotal!=0 && mode->vtotal!=0)
65 rate = mode->dotclock * 1000 / (mode->htotal * mode->vtotal);
68 X11DRV_Settings_AddOneMode(mode->hdisplay, mode->vdisplay, 0, rate);
71 static void convert_modeline(int dotclock, const XF86VidModeModeLine *mode, LPDDHALMODEINFO info, unsigned int bpp)
73 info->dwWidth = mode->hdisplay;
74 info->dwHeight = mode->vdisplay;
75 if (mode->htotal!=0 && mode->vtotal!=0)
76 info->wRefreshRate = dotclock * 1000 / (mode->htotal * mode->vtotal);
78 info->wRefreshRate = 0;
79 TRACE(" width=%ld, height=%ld, refresh=%d\n",
80 info->dwWidth, info->dwHeight, info->wRefreshRate);
87 info->dwAlphaBitMask = 0;
90 static int XVidModeErrorHandler(Display *dpy, XErrorEvent *event, void *arg)
95 static Bool in_desktop_mode;
97 int X11DRV_XF86VM_GetCurrentMode(void)
99 XF86VidModeModeLine line;
102 DWORD dwBpp = screen_depth;
103 if (dwBpp == 24) dwBpp = 32;
105 TRACE("Querying XVidMode current mode\n");
107 XF86VidModeGetModeLine(gdi_display, DefaultScreen(gdi_display), &dotclock, &line);
109 convert_modeline(dotclock, &line, &cmode, dwBpp);
110 for (i=0; i<dd_mode_count; i++)
111 if (memcmp(&dd_modes[i], &cmode, sizeof(cmode)) == 0) {
112 TRACE("mode=%d\n", i);
115 ERR("In unknown mode, returning default\n");
116 return xf86vm_initial_mode;
119 void X11DRV_XF86VM_SetCurrentMode(int mode)
121 DWORD dwBpp = screen_depth;
122 if (dwBpp == 24) dwBpp = 32;
123 /* only set modes from the original color depth */
124 if (dwBpp != dd_modes[mode].dwBPP)
126 FIXME("Cannot change screen BPP from %ld to %ld\n", dwBpp, dd_modes[mode].dwBPP);
128 mode = mode % real_xf86vm_mode_count;
131 TRACE("Resizing X display to %dx%d\n",
132 real_xf86vm_modes[mode]->hdisplay, real_xf86vm_modes[mode]->vdisplay);
133 XF86VidModeSwitchToMode(gdi_display, DefaultScreen(gdi_display), real_xf86vm_modes[mode]);
135 SYSMETRICS_Set( SM_CXSCREEN, real_xf86vm_modes[mode]->hdisplay );
136 SYSMETRICS_Set( SM_CYSCREEN, real_xf86vm_modes[mode]->vdisplay );
138 FIXME("Need to update SYSMETRICS after resizing display (now %dx%d)\n",
139 real_xf86vm_modes[mode]->hdisplay, real_xf86vm_modes[mode]->vdisplay);
141 #if 0 /* it is said that SetViewPort causes problems with some X servers */
142 XF86VidModeSetViewPort(gdi_display, DefaultScreen(gdi_display), 0, 0);
144 XWarpPointer(gdi_display, None, DefaultRootWindow(gdi_display), 0, 0, 0, 0, 0, 0);
146 XSync(gdi_display, False);
150 void X11DRV_XF86VM_Init(void)
154 DWORD dwBpp = screen_depth;
155 if (dwBpp == 24) dwBpp = 32;
157 in_desktop_mode = (root_window != DefaultRootWindow(gdi_display));
159 if (xf86vm_major) return; /* already initialized? */
161 if (!usexvidmode) return;
163 /* see if XVidMode is available */
165 ok = XF86VidModeQueryExtension(gdi_display, &xf86vm_event, &xf86vm_error);
168 X11DRV_expect_error(gdi_display, XVidModeErrorHandler, NULL);
169 ok = XF86VidModeQueryVersion(gdi_display, &xf86vm_major, &xf86vm_minor);
170 if (X11DRV_check_error()) ok = FALSE;
174 #ifdef X_XF86VidModeSetGammaRamp
175 if (xf86vm_major > 2 || (xf86vm_major == 2 && xf86vm_minor >= 1))
177 XF86VidModeGetGammaRampSize(gdi_display, DefaultScreen(gdi_display),
178 &xf86vm_gammaramp_size);
179 if (xf86vm_gammaramp_size == 256)
180 xf86vm_use_gammaramp = TRUE;
182 #endif /* X_XF86VidModeSetGammaRamp */
185 if (!in_desktop_mode) ok = XF86VidModeGetAllModeLines(gdi_display, DefaultScreen(gdi_display), &nmodes, &real_xf86vm_modes);
190 /* In desktop mode, do not switch resolution... But still use the Gamma ramp stuff */
191 if (in_desktop_mode) return;
193 TRACE("XVidMode modes: count=%d\n", nmodes);
195 real_xf86vm_mode_count = nmodes;
197 dd_modes = X11DRV_Settings_SetHandlers("XF86VidMode",
198 X11DRV_XF86VM_GetCurrentMode,
199 X11DRV_XF86VM_SetCurrentMode,
202 /* convert modes to DDHALMODEINFO format */
203 for (i=0; i<real_xf86vm_mode_count; i++)
205 convert_modeinfo(real_xf86vm_modes[i]);
207 /* add modes for different color depths */
208 X11DRV_Settings_AddDepthModes();
209 dd_mode_count = X11DRV_Settings_GetModeCount();
211 TRACE("Available DD modes: count=%d\n", dd_mode_count);
213 /* store the current mode at the time we started */
214 xf86vm_initial_mode = X11DRV_XF86VM_GetCurrentMode();
215 X11DRV_Settings_SetDefaultMode(xf86vm_initial_mode);
217 TRACE("Enabling XVidMode\n");
220 void X11DRV_XF86VM_Cleanup(void)
223 if (real_xf86vm_modes) XFree(real_xf86vm_modes);
227 void X11DRV_XF86VM_SetExclusiveMode(int lock)
229 if (!dd_modes) return; /* no XVidMode */
232 XF86VidModeLockModeSwitch(gdi_display, DefaultScreen(gdi_display), lock);
236 /***** GAMMA CONTROL *****/
237 /* (only available in XF86VidMode 2.x) */
239 #ifdef X_XF86VidModeSetGamma
241 static void GenerateRampFromGamma(WORD ramp[256], float gamma)
243 float r_gamma = 1/gamma;
245 TRACE("gamma is %f\n", r_gamma);
246 for (i=0; i<256; i++)
247 ramp[i] = pow(i/255.0, r_gamma) * 65535.0;
250 static BOOL ComputeGammaFromRamp(WORD ramp[256], float *gamma)
252 float r_x, r_y, r_lx, r_ly, r_d, r_v, r_e, g_avg, g_min, g_max;
253 unsigned i, f, l, g_n, c;
257 ERR("inverted or flat gamma ramp (%d->%d), rejected\n", f, l);
261 g_min = g_max = g_avg = 0.0;
262 /* check gamma ramp entries to estimate the gamma */
263 TRACE("analyzing gamma ramp (%d->%d)\n", f, l);
264 for (i=1, g_n=0; i<255; i++) {
265 if (ramp[i] < f || ramp[i] > l) {
266 ERR("strange gamma ramp ([%d]=%d for %d->%d), rejected\n", i, ramp[i], f, l);
270 if (!c) continue; /* avoid log(0) */
272 /* normalize entry values into 0..1 range */
273 r_x = i/255.0; r_y = c / r_d;
274 /* compute logarithms of values */
275 r_lx = log(r_x); r_ly = log(r_y);
276 /* compute gamma for this entry */
278 /* compute differential (error estimate) for this entry */
279 /* some games use table-based logarithms that magnifies the error by 128 */
280 r_e = -r_lx * 128 / (c * r_lx * r_lx);
282 /* compute min & max while compensating for estimated error */
283 if (!g_n || g_min > (r_v + r_e)) g_min = r_v + r_e;
284 if (!g_n || g_max < (r_v - r_e)) g_max = r_v - r_e;
289 /* TRACE("[%d]=%d, gamma=%f, error=%f\n", i, ramp[i], r_v, r_e); */
292 ERR("no gamma data, shouldn't happen\n");
296 TRACE("low bias is %d, high is %d, gamma is %5.3f\n", f, 65535-l, g_avg);
297 /* the bias could be because the app wanted something like a "red shift"
298 * like when you're hit in Quake, but XVidMode doesn't support it,
299 * so we have to reject a significant bias */
300 if (f && f > (pow(1/255.0, g_avg) * 65536.0)) {
301 ERR("low-biased gamma ramp (%d), rejected\n", f);
304 /* check that the gamma is reasonably uniform across the ramp */
305 if (g_max - g_min > 0.1) {
306 ERR("ramp not uniform (max=%f, min=%f, avg=%f), rejected\n", g_max, g_min, g_avg);
309 /* ok, now we're pretty sure we can set the desired gamma ramp,
315 #endif /* X_XF86VidModeSetGamma */
317 /* Hmm... should gamma control be available in desktop mode or not?
318 * I'll assume that it should */
320 BOOL X11DRV_XF86VM_GetGammaRamp(LPDDGAMMARAMP ramp)
322 #ifdef X_XF86VidModeSetGamma
323 XF86VidModeGamma gamma;
326 if (xf86vm_major < 2) return FALSE; /* no gamma control */
327 #ifdef X_XF86VidModeSetGammaRamp
328 else if (xf86vm_use_gammaramp)
332 ret = XF86VidModeGetGammaRamp(gdi_display, DefaultScreen(gdi_display), 256,
333 ramp->red, ramp->green, ramp->blue);
341 ret = XF86VidModeGetGamma(gdi_display, DefaultScreen(gdi_display), &gamma);
344 GenerateRampFromGamma(ramp->red, gamma.red);
345 GenerateRampFromGamma(ramp->green, gamma.green);
346 GenerateRampFromGamma(ramp->blue, gamma.blue);
350 #endif /* X_XF86VidModeSetGamma */
354 BOOL X11DRV_XF86VM_SetGammaRamp(LPDDGAMMARAMP ramp)
356 #ifdef X_XF86VidModeSetGamma
357 XF86VidModeGamma gamma;
359 if (xf86vm_major < 2) return FALSE; /* no gamma control */
360 #ifdef X_XF86VidModeSetGammaRamp
361 else if (xf86vm_use_gammaramp)
365 ret = XF86VidModeSetGammaRamp(gdi_display, DefaultScreen(gdi_display), 256,
366 ramp->red, ramp->green, ramp->blue);
373 if (ComputeGammaFromRamp(ramp->red, &gamma.red) &&
374 ComputeGammaFromRamp(ramp->green, &gamma.green) &&
375 ComputeGammaFromRamp(ramp->blue, &gamma.blue)) {
378 ret = XF86VidModeSetGamma(gdi_display, DefaultScreen(gdi_display), &gamma);
383 #endif /* X_XF86VidModeSetGamma */
387 #endif /* HAVE_LIBXXF86VM */
389 /***********************************************************************
390 * GetDeviceGammaRamp (X11DRV.@)
392 * FIXME: should move to somewhere appropriate, but probably not before
393 * the stuff in graphics/x11drv/ has been moved to dlls/x11drv, so that
394 * they can include xvidmode.h directly
396 BOOL X11DRV_GetDeviceGammaRamp(X11DRV_PDEVICE *physDev, LPVOID ramp)
398 #ifdef HAVE_LIBXXF86VM
399 return X11DRV_XF86VM_GetGammaRamp(ramp);
405 /***********************************************************************
406 * SetDeviceGammaRamp (X11DRV.@)
408 * FIXME: should move to somewhere appropriate, but probably not before
409 * the stuff in graphics/x11drv/ has been moved to dlls/x11drv, so that
410 * they can include xvidmode.h directly
412 BOOL X11DRV_SetDeviceGammaRamp(X11DRV_PDEVICE *physDev, LPVOID ramp)
414 #ifdef HAVE_LIBXXF86VM
415 return X11DRV_XF86VM_SetGammaRamp(ramp);