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>
40 #include "wine/debug.h"
41 #include "wine/library.h"
43 WINE_DEFAULT_DEBUG_CHANNEL(xvidmode);
45 #ifdef SONAME_LIBXXF86VM
47 extern int usexvidmode;
49 static int xf86vm_event, xf86vm_error, xf86vm_major, xf86vm_minor;
51 #ifdef X_XF86VidModeSetGammaRamp
52 static int xf86vm_gammaramp_size;
53 static BOOL xf86vm_use_gammaramp;
54 #endif /* X_XF86VidModeSetGammaRamp */
56 static struct x11drv_mode_info *dd_modes;
57 static unsigned int dd_mode_count;
58 static XF86VidModeModeInfo** real_xf86vm_modes;
59 static unsigned int real_xf86vm_mode_count;
61 #define MAKE_FUNCPTR(f) static typeof(f) * p##f;
62 MAKE_FUNCPTR(XF86VidModeGetAllModeLines)
63 MAKE_FUNCPTR(XF86VidModeGetModeLine)
64 MAKE_FUNCPTR(XF86VidModeLockModeSwitch)
65 MAKE_FUNCPTR(XF86VidModeQueryExtension)
66 MAKE_FUNCPTR(XF86VidModeQueryVersion)
67 MAKE_FUNCPTR(XF86VidModeSetViewPort)
68 MAKE_FUNCPTR(XF86VidModeSwitchToMode)
69 #ifdef X_XF86VidModeSetGamma
70 MAKE_FUNCPTR(XF86VidModeGetGamma)
71 MAKE_FUNCPTR(XF86VidModeSetGamma)
73 #ifdef X_XF86VidModeSetGammaRamp
74 MAKE_FUNCPTR(XF86VidModeGetGammaRamp)
75 MAKE_FUNCPTR(XF86VidModeGetGammaRampSize)
76 MAKE_FUNCPTR(XF86VidModeSetGammaRamp)
81 static void convert_modeinfo( const XF86VidModeModeInfo *mode)
84 if (mode->htotal!=0 && mode->vtotal!=0)
85 rate = mode->dotclock * 1000 / (mode->htotal * mode->vtotal);
88 X11DRV_Settings_AddOneMode(mode->hdisplay, mode->vdisplay, 0, rate);
91 static void convert_modeline(int dotclock, const XF86VidModeModeLine *mode,
92 struct x11drv_mode_info *info, unsigned int bpp)
94 info->width = mode->hdisplay;
95 info->height = mode->vdisplay;
96 if (mode->htotal!=0 && mode->vtotal!=0)
97 info->refresh_rate = dotclock * 1000 / (mode->htotal * mode->vtotal);
99 info->refresh_rate = 0;
100 TRACE(" width=%d, height=%d, refresh=%d\n",
101 info->width, info->height, info->refresh_rate);
105 static int XVidModeErrorHandler(Display *dpy, XErrorEvent *event, void *arg)
110 static int X11DRV_XF86VM_GetCurrentMode(void)
112 XF86VidModeModeLine line;
115 struct x11drv_mode_info cmode;
116 DWORD dwBpp = screen_bpp;
118 TRACE("Querying XVidMode current mode\n");
119 pXF86VidModeGetModeLine(gdi_display, DefaultScreen(gdi_display), &dotclock, &line);
120 convert_modeline(dotclock, &line, &cmode, dwBpp);
121 for (i=0; i<dd_mode_count; i++)
122 if (memcmp(&dd_modes[i], &cmode, sizeof(cmode)) == 0) {
123 TRACE("mode=%d\n", i);
126 ERR("In unknown mode, returning default\n");
130 static LONG X11DRV_XF86VM_SetCurrentMode(int mode)
132 DWORD dwBpp = screen_bpp;
133 /* only set modes from the original color depth */
134 if (dwBpp != dd_modes[mode].bpp)
136 FIXME("Cannot change screen BPP from %d to %d\n", dwBpp, dd_modes[mode].bpp);
138 mode = mode % real_xf86vm_mode_count;
140 TRACE("Resizing X display to %dx%d\n",
141 real_xf86vm_modes[mode]->hdisplay, real_xf86vm_modes[mode]->vdisplay);
142 pXF86VidModeSwitchToMode(gdi_display, DefaultScreen(gdi_display), real_xf86vm_modes[mode]);
143 #if 0 /* it is said that SetViewPort causes problems with some X servers */
144 pXF86VidModeSetViewPort(gdi_display, DefaultScreen(gdi_display), 0, 0);
146 XWarpPointer(gdi_display, None, DefaultRootWindow(gdi_display), 0, 0, 0, 0, 0, 0);
148 XSync(gdi_display, False);
149 X11DRV_resize_desktop( real_xf86vm_modes[mode]->hdisplay, real_xf86vm_modes[mode]->vdisplay );
150 return DISP_CHANGE_SUCCESSFUL;
154 void X11DRV_XF86VM_Init(void)
156 void *xvidmode_handle;
161 if (xf86vm_major) return; /* already initialized? */
163 xvidmode_handle = wine_dlopen(SONAME_LIBXXF86VM, RTLD_NOW, NULL, 0);
164 if (!xvidmode_handle)
166 TRACE("Unable to open %s, XVidMode disabled\n", SONAME_LIBXXF86VM);
171 #define LOAD_FUNCPTR(f) \
172 if((p##f = wine_dlsym(xvidmode_handle, #f, NULL, 0)) == NULL) \
174 LOAD_FUNCPTR(XF86VidModeGetAllModeLines)
175 LOAD_FUNCPTR(XF86VidModeGetModeLine)
176 LOAD_FUNCPTR(XF86VidModeLockModeSwitch)
177 LOAD_FUNCPTR(XF86VidModeQueryExtension)
178 LOAD_FUNCPTR(XF86VidModeQueryVersion)
179 LOAD_FUNCPTR(XF86VidModeSetViewPort)
180 LOAD_FUNCPTR(XF86VidModeSwitchToMode)
181 #ifdef X_XF86VidModeSetGamma
182 LOAD_FUNCPTR(XF86VidModeGetGamma)
183 LOAD_FUNCPTR(XF86VidModeSetGamma)
185 #ifdef X_XF86VidModeSetGammaRamp
186 LOAD_FUNCPTR(XF86VidModeGetGammaRamp)
187 LOAD_FUNCPTR(XF86VidModeGetGammaRampSize)
188 LOAD_FUNCPTR(XF86VidModeSetGammaRamp)
192 /* see if XVidMode is available */
193 if (!pXF86VidModeQueryExtension(gdi_display, &xf86vm_event, &xf86vm_error)) return;
195 X11DRV_expect_error(gdi_display, XVidModeErrorHandler, NULL);
196 ok = pXF86VidModeQueryVersion(gdi_display, &xf86vm_major, &xf86vm_minor);
197 if (X11DRV_check_error() || !ok) return;
199 #ifdef X_XF86VidModeSetGammaRamp
200 if (xf86vm_major > 2 || (xf86vm_major == 2 && xf86vm_minor >= 1))
202 X11DRV_expect_error(gdi_display, XVidModeErrorHandler, NULL);
203 pXF86VidModeGetGammaRampSize(gdi_display, DefaultScreen(gdi_display),
204 &xf86vm_gammaramp_size);
205 if (X11DRV_check_error()) xf86vm_gammaramp_size = 0;
206 if (xf86vm_gammaramp_size == 256)
207 xf86vm_use_gammaramp = TRUE;
209 #endif /* X_XF86VidModeSetGammaRamp */
212 if (usexvidmode && root_window == DefaultRootWindow( gdi_display ))
214 X11DRV_expect_error(gdi_display, XVidModeErrorHandler, NULL);
215 ok = pXF86VidModeGetAllModeLines(gdi_display, DefaultScreen(gdi_display), &nmodes, &real_xf86vm_modes);
216 if (X11DRV_check_error() || !ok) return;
218 else return; /* In desktop mode, do not switch resolution... But still use the Gamma ramp stuff */
220 TRACE("XVidMode modes: count=%d\n", nmodes);
222 real_xf86vm_mode_count = nmodes;
224 dd_modes = X11DRV_Settings_SetHandlers("XF86VidMode",
225 X11DRV_XF86VM_GetCurrentMode,
226 X11DRV_XF86VM_SetCurrentMode,
229 /* convert modes to x11drv_mode_info format */
230 for (i=0; i<real_xf86vm_mode_count; i++)
232 convert_modeinfo(real_xf86vm_modes[i]);
234 /* add modes for different color depths */
235 X11DRV_Settings_AddDepthModes();
236 dd_mode_count = X11DRV_Settings_GetModeCount();
238 TRACE("Available DD modes: count=%d\n", dd_mode_count);
239 TRACE("Enabling XVidMode\n");
243 TRACE("Unable to load function pointers from %s, XVidMode disabled\n", SONAME_LIBXXF86VM);
244 wine_dlclose(xvidmode_handle, NULL, 0);
245 xvidmode_handle = NULL;
249 /***** GAMMA CONTROL *****/
250 /* (only available in XF86VidMode 2.x) */
252 #ifdef X_XF86VidModeSetGamma
254 static void GenerateRampFromGamma(WORD ramp[256], float gamma)
256 float r_gamma = 1/gamma;
258 TRACE("gamma is %f\n", r_gamma);
259 for (i=0; i<256; i++)
260 ramp[i] = pow(i/255.0, r_gamma) * 65535.0;
263 static BOOL ComputeGammaFromRamp(WORD ramp[256], float *gamma)
265 float r_x, r_y, r_lx, r_ly, r_d, r_v, r_e, g_avg, g_min, g_max;
266 unsigned i, f, l, g_n, c;
270 ERR("inverted or flat gamma ramp (%d->%d), rejected\n", f, l);
274 g_min = g_max = g_avg = 0.0;
275 /* check gamma ramp entries to estimate the gamma */
276 TRACE("analyzing gamma ramp (%d->%d)\n", f, l);
277 for (i=1, g_n=0; i<255; i++) {
278 if (ramp[i] < f || ramp[i] > l) {
279 ERR("strange gamma ramp ([%d]=%d for %d->%d), rejected\n", i, ramp[i], f, l);
283 if (!c) continue; /* avoid log(0) */
285 /* normalize entry values into 0..1 range */
286 r_x = i/255.0; r_y = c / r_d;
287 /* compute logarithms of values */
288 r_lx = log(r_x); r_ly = log(r_y);
289 /* compute gamma for this entry */
291 /* compute differential (error estimate) for this entry */
292 /* some games use table-based logarithms that magnifies the error by 128 */
293 r_e = -r_lx * 128 / (c * r_lx * r_lx);
295 /* compute min & max while compensating for estimated error */
296 if (!g_n || g_min > (r_v + r_e)) g_min = r_v + r_e;
297 if (!g_n || g_max < (r_v - r_e)) g_max = r_v - r_e;
302 /* TRACE("[%d]=%d, gamma=%f, error=%f\n", i, ramp[i], r_v, r_e); */
305 ERR("no gamma data, shouldn't happen\n");
309 TRACE("low bias is %d, high is %d, gamma is %5.3f\n", f, 65535-l, g_avg);
310 /* the bias could be because the app wanted something like a "red shift"
311 * like when you're hit in Quake, but XVidMode doesn't support it,
312 * so we have to reject a significant bias */
313 if (f && f > (pow(1/255.0, g_avg) * 65536.0)) {
314 ERR("low-biased gamma ramp (%d), rejected\n", f);
317 /* check that the gamma is reasonably uniform across the ramp */
318 if (g_max - g_min > 12.8) {
319 ERR("ramp not uniform (max=%f, min=%f, avg=%f), rejected\n", g_max, g_min, g_avg);
322 /* check that the gamma is not too bright */
324 ERR("too bright gamma ( %5.3f), rejected\n", g_avg);
327 /* ok, now we're pretty sure we can set the desired gamma ramp,
333 #endif /* X_XF86VidModeSetGamma */
335 /* Hmm... should gamma control be available in desktop mode or not?
336 * I'll assume that it should */
338 static BOOL X11DRV_XF86VM_GetGammaRamp(LPDDGAMMARAMP ramp)
340 #ifdef X_XF86VidModeSetGamma
341 XF86VidModeGamma gamma;
343 if (xf86vm_major < 2) return FALSE; /* no gamma control */
344 #ifdef X_XF86VidModeSetGammaRamp
345 if (xf86vm_use_gammaramp)
346 return pXF86VidModeGetGammaRamp(gdi_display, DefaultScreen(gdi_display), 256,
347 ramp->red, ramp->green, ramp->blue);
349 if (pXF86VidModeGetGamma(gdi_display, DefaultScreen(gdi_display), &gamma))
351 GenerateRampFromGamma(ramp->red, gamma.red);
352 GenerateRampFromGamma(ramp->green, gamma.green);
353 GenerateRampFromGamma(ramp->blue, gamma.blue);
356 #endif /* X_XF86VidModeSetGamma */
360 static BOOL X11DRV_XF86VM_SetGammaRamp(LPDDGAMMARAMP ramp)
362 #ifdef X_XF86VidModeSetGamma
363 XF86VidModeGamma gamma;
365 if (xf86vm_major < 2 || !usexvidmode) return FALSE; /* no gamma control */
366 if (!ComputeGammaFromRamp(ramp->red, &gamma.red) || /* ramp validation */
367 !ComputeGammaFromRamp(ramp->green, &gamma.green) ||
368 !ComputeGammaFromRamp(ramp->blue, &gamma.blue)) return FALSE;
369 #ifdef X_XF86VidModeSetGammaRamp
370 if (xf86vm_use_gammaramp)
371 return pXF86VidModeSetGammaRamp(gdi_display, DefaultScreen(gdi_display), 256,
372 ramp->red, ramp->green, ramp->blue);
374 return pXF86VidModeSetGamma(gdi_display, DefaultScreen(gdi_display), &gamma);
377 #endif /* X_XF86VidModeSetGamma */
380 #else /* SONAME_LIBXXF86VM */
382 void X11DRV_XF86VM_Init(void)
384 TRACE("XVidMode support not compiled in.\n");
387 #endif /* SONAME_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(PHYSDEV dev, LPVOID ramp)
398 #ifdef SONAME_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(PHYSDEV dev, LPVOID ramp)
414 #ifdef SONAME_LIBXXF86VM
415 return X11DRV_XF86VM_SetGammaRamp(ramp);