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");
120 pXF86VidModeGetModeLine(gdi_display, DefaultScreen(gdi_display), &dotclock, &line);
122 convert_modeline(dotclock, &line, &cmode, dwBpp);
123 for (i=0; i<dd_mode_count; i++)
124 if (memcmp(&dd_modes[i], &cmode, sizeof(cmode)) == 0) {
125 TRACE("mode=%d\n", i);
128 ERR("In unknown mode, returning default\n");
132 static LONG X11DRV_XF86VM_SetCurrentMode(int mode)
134 DWORD dwBpp = screen_bpp;
135 /* only set modes from the original color depth */
136 if (dwBpp != dd_modes[mode].bpp)
138 FIXME("Cannot change screen BPP from %d to %d\n", dwBpp, dd_modes[mode].bpp);
140 mode = mode % real_xf86vm_mode_count;
143 TRACE("Resizing X display to %dx%d\n",
144 real_xf86vm_modes[mode]->hdisplay, real_xf86vm_modes[mode]->vdisplay);
145 pXF86VidModeSwitchToMode(gdi_display, DefaultScreen(gdi_display), real_xf86vm_modes[mode]);
146 #if 0 /* it is said that SetViewPort causes problems with some X servers */
147 pXF86VidModeSetViewPort(gdi_display, DefaultScreen(gdi_display), 0, 0);
149 XWarpPointer(gdi_display, None, DefaultRootWindow(gdi_display), 0, 0, 0, 0, 0, 0);
151 XSync(gdi_display, False);
153 X11DRV_resize_desktop( real_xf86vm_modes[mode]->hdisplay, real_xf86vm_modes[mode]->vdisplay );
154 return DISP_CHANGE_SUCCESSFUL;
158 void X11DRV_XF86VM_Init(void)
160 void *xvidmode_handle;
165 if (xf86vm_major) return; /* already initialized? */
167 xvidmode_handle = wine_dlopen(SONAME_LIBXXF86VM, RTLD_NOW, NULL, 0);
168 if (!xvidmode_handle)
170 TRACE("Unable to open %s, XVidMode disabled\n", SONAME_LIBXXF86VM);
175 #define LOAD_FUNCPTR(f) \
176 if((p##f = wine_dlsym(xvidmode_handle, #f, NULL, 0)) == NULL) \
178 LOAD_FUNCPTR(XF86VidModeGetAllModeLines)
179 LOAD_FUNCPTR(XF86VidModeGetModeLine)
180 LOAD_FUNCPTR(XF86VidModeLockModeSwitch)
181 LOAD_FUNCPTR(XF86VidModeQueryExtension)
182 LOAD_FUNCPTR(XF86VidModeQueryVersion)
183 LOAD_FUNCPTR(XF86VidModeSetViewPort)
184 LOAD_FUNCPTR(XF86VidModeSwitchToMode)
185 #ifdef X_XF86VidModeSetGamma
186 LOAD_FUNCPTR(XF86VidModeGetGamma)
187 LOAD_FUNCPTR(XF86VidModeSetGamma)
189 #ifdef X_XF86VidModeSetGammaRamp
190 LOAD_FUNCPTR(XF86VidModeGetGammaRamp)
191 LOAD_FUNCPTR(XF86VidModeGetGammaRampSize)
192 LOAD_FUNCPTR(XF86VidModeSetGammaRamp)
196 /* see if XVidMode is available */
198 ok = pXF86VidModeQueryExtension(gdi_display, &xf86vm_event, &xf86vm_error);
202 X11DRV_expect_error(gdi_display, XVidModeErrorHandler, NULL);
203 ok = pXF86VidModeQueryVersion(gdi_display, &xf86vm_major, &xf86vm_minor);
204 if (X11DRV_check_error() || !ok) return;
206 #ifdef X_XF86VidModeSetGammaRamp
207 if (xf86vm_major > 2 || (xf86vm_major == 2 && xf86vm_minor >= 1))
209 X11DRV_expect_error(gdi_display, XVidModeErrorHandler, NULL);
210 pXF86VidModeGetGammaRampSize(gdi_display, DefaultScreen(gdi_display),
211 &xf86vm_gammaramp_size);
212 if (X11DRV_check_error()) xf86vm_gammaramp_size = 0;
213 if (xf86vm_gammaramp_size == 256)
214 xf86vm_use_gammaramp = TRUE;
216 #endif /* X_XF86VidModeSetGammaRamp */
219 if (usexvidmode && root_window == DefaultRootWindow( gdi_display ))
221 X11DRV_expect_error(gdi_display, XVidModeErrorHandler, NULL);
222 ok = pXF86VidModeGetAllModeLines(gdi_display, DefaultScreen(gdi_display), &nmodes, &real_xf86vm_modes);
223 if (X11DRV_check_error() || !ok) return;
225 else return; /* In desktop mode, do not switch resolution... But still use the Gamma ramp stuff */
227 TRACE("XVidMode modes: count=%d\n", nmodes);
229 real_xf86vm_mode_count = nmodes;
231 dd_modes = X11DRV_Settings_SetHandlers("XF86VidMode",
232 X11DRV_XF86VM_GetCurrentMode,
233 X11DRV_XF86VM_SetCurrentMode,
236 /* convert modes to x11drv_mode_info format */
237 for (i=0; i<real_xf86vm_mode_count; i++)
239 convert_modeinfo(real_xf86vm_modes[i]);
241 /* add modes for different color depths */
242 X11DRV_Settings_AddDepthModes();
243 dd_mode_count = X11DRV_Settings_GetModeCount();
245 TRACE("Available DD modes: count=%d\n", dd_mode_count);
246 TRACE("Enabling XVidMode\n");
250 TRACE("Unable to load function pointers from %s, XVidMode disabled\n", SONAME_LIBXXF86VM);
251 wine_dlclose(xvidmode_handle, NULL, 0);
252 xvidmode_handle = NULL;
256 void X11DRV_XF86VM_Cleanup(void)
259 if (real_xf86vm_modes) XFree(real_xf86vm_modes);
263 /***** GAMMA CONTROL *****/
264 /* (only available in XF86VidMode 2.x) */
266 #ifdef X_XF86VidModeSetGamma
268 static void GenerateRampFromGamma(WORD ramp[256], float gamma)
270 float r_gamma = 1/gamma;
272 TRACE("gamma is %f\n", r_gamma);
273 for (i=0; i<256; i++)
274 ramp[i] = pow(i/255.0, r_gamma) * 65535.0;
277 static BOOL ComputeGammaFromRamp(WORD ramp[256], float *gamma)
279 float r_x, r_y, r_lx, r_ly, r_d, r_v, r_e, g_avg, g_min, g_max;
280 unsigned i, f, l, g_n, c;
284 ERR("inverted or flat gamma ramp (%d->%d), rejected\n", f, l);
288 g_min = g_max = g_avg = 0.0;
289 /* check gamma ramp entries to estimate the gamma */
290 TRACE("analyzing gamma ramp (%d->%d)\n", f, l);
291 for (i=1, g_n=0; i<255; i++) {
292 if (ramp[i] < f || ramp[i] > l) {
293 ERR("strange gamma ramp ([%d]=%d for %d->%d), rejected\n", i, ramp[i], f, l);
297 if (!c) continue; /* avoid log(0) */
299 /* normalize entry values into 0..1 range */
300 r_x = i/255.0; r_y = c / r_d;
301 /* compute logarithms of values */
302 r_lx = log(r_x); r_ly = log(r_y);
303 /* compute gamma for this entry */
305 /* compute differential (error estimate) for this entry */
306 /* some games use table-based logarithms that magnifies the error by 128 */
307 r_e = -r_lx * 128 / (c * r_lx * r_lx);
309 /* compute min & max while compensating for estimated error */
310 if (!g_n || g_min > (r_v + r_e)) g_min = r_v + r_e;
311 if (!g_n || g_max < (r_v - r_e)) g_max = r_v - r_e;
316 /* TRACE("[%d]=%d, gamma=%f, error=%f\n", i, ramp[i], r_v, r_e); */
319 ERR("no gamma data, shouldn't happen\n");
323 TRACE("low bias is %d, high is %d, gamma is %5.3f\n", f, 65535-l, g_avg);
324 /* the bias could be because the app wanted something like a "red shift"
325 * like when you're hit in Quake, but XVidMode doesn't support it,
326 * so we have to reject a significant bias */
327 if (f && f > (pow(1/255.0, g_avg) * 65536.0)) {
328 ERR("low-biased gamma ramp (%d), rejected\n", f);
331 /* check that the gamma is reasonably uniform across the ramp */
332 if (g_max - g_min > 12.8) {
333 ERR("ramp not uniform (max=%f, min=%f, avg=%f), rejected\n", g_max, g_min, g_avg);
336 /* check that the gamma is not too bright */
338 ERR("too bright gamma ( %5.3f), rejected\n", g_avg);
341 /* ok, now we're pretty sure we can set the desired gamma ramp,
347 #endif /* X_XF86VidModeSetGamma */
349 /* Hmm... should gamma control be available in desktop mode or not?
350 * I'll assume that it should */
352 static BOOL X11DRV_XF86VM_GetGammaRamp(LPDDGAMMARAMP ramp)
354 #ifdef X_XF86VidModeSetGamma
355 XF86VidModeGamma gamma;
358 if (xf86vm_major < 2) return FALSE; /* no gamma control */
359 #ifdef X_XF86VidModeSetGammaRamp
360 else if (xf86vm_use_gammaramp)
364 ret = pXF86VidModeGetGammaRamp(gdi_display, DefaultScreen(gdi_display), 256,
365 ramp->red, ramp->green, ramp->blue);
373 ret = pXF86VidModeGetGamma(gdi_display, DefaultScreen(gdi_display), &gamma);
376 GenerateRampFromGamma(ramp->red, gamma.red);
377 GenerateRampFromGamma(ramp->green, gamma.green);
378 GenerateRampFromGamma(ramp->blue, gamma.blue);
382 #endif /* X_XF86VidModeSetGamma */
386 static BOOL X11DRV_XF86VM_SetGammaRamp(LPDDGAMMARAMP ramp)
389 #ifdef X_XF86VidModeSetGamma
390 XF86VidModeGamma gamma;
392 if (xf86vm_major < 2 || !usexvidmode) return FALSE; /* no gamma control */
393 if (!ComputeGammaFromRamp(ramp->red, &gamma.red) || /* ramp validation */
394 !ComputeGammaFromRamp(ramp->green, &gamma.green) ||
395 !ComputeGammaFromRamp(ramp->blue, &gamma.blue)) return FALSE;
397 #ifdef X_XF86VidModeSetGammaRamp
398 if (xf86vm_use_gammaramp)
399 ret = pXF86VidModeSetGammaRamp(gdi_display, DefaultScreen(gdi_display), 256,
400 ramp->red, ramp->green, ramp->blue);
403 ret = pXF86VidModeSetGamma(gdi_display, DefaultScreen(gdi_display), &gamma);
405 #endif /* X_XF86VidModeSetGamma */
409 #else /* SONAME_LIBXXF86VM */
411 void X11DRV_XF86VM_Init(void)
413 TRACE("XVidMode support not compiled in.\n");
416 void X11DRV_XF86VM_Cleanup(void)
420 #endif /* SONAME_LIBXXF86VM */
422 /***********************************************************************
423 * GetDeviceGammaRamp (X11DRV.@)
425 * FIXME: should move to somewhere appropriate, but probably not before
426 * the stuff in graphics/x11drv/ has been moved to dlls/x11drv, so that
427 * they can include xvidmode.h directly
429 BOOL X11DRV_GetDeviceGammaRamp(PHYSDEV dev, LPVOID ramp)
431 #ifdef SONAME_LIBXXF86VM
432 return X11DRV_XF86VM_GetGammaRamp(ramp);
438 /***********************************************************************
439 * SetDeviceGammaRamp (X11DRV.@)
441 * FIXME: should move to somewhere appropriate, but probably not before
442 * the stuff in graphics/x11drv/ has been moved to dlls/x11drv, so that
443 * they can include xvidmode.h directly
445 BOOL X11DRV_SetDeviceGammaRamp(PHYSDEV dev, LPVOID ramp)
447 #ifdef SONAME_LIBXXF86VM
448 return X11DRV_XF86VM_SetGammaRamp(ramp);