1 /*
2 *Copyright (C) 2001-2004 Harold L Hunt II All Rights Reserved.
3 *
4 *Permission is hereby granted, free of charge, to any person obtaining
5 * a copy of this software and associated documentation files (the
6 *"Software"), to deal in the Software without restriction, including
7 *without limitation the rights to use, copy, modify, merge, publish,
8 *distribute, sublicense, and/or sell copies of the Software, and to
9 *permit persons to whom the Software is furnished to do so, subject to
10 *the following conditions:
11 *
12 *The above copyright notice and this permission notice shall be
13 *included in all copies or substantial portions of the Software.
14 *
15 *THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 *EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 *MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 *NONINFRINGEMENT. IN NO EVENT SHALL HAROLD L HUNT II BE LIABLE FOR
19 *ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
20 *CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
21 *WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
22 *
23 *Except as contained in this notice, the name of Harold L Hunt II
24 *shall not be used in advertising or otherwise to promote the sale, use
25 *or other dealings in this Software without prior written authorization
26 *from Harold L Hunt II.
27 *
28 * Authors: Harold L Hunt II
29 */
30
31 #ifdef HAVE_XWIN_CONFIG_H
32 #include <xwin-config.h>
33 #endif
34 #include "win.h"
35 #include "winmsg.h"
36
37 /*
38 * Global variables for function pointers into
39 * dynamically loaded libraries
40 */
41 FARPROC g_fpDirectDrawCreate = NULL;
42 FARPROC g_fpDirectDrawCreateClipper = NULL;
43
44 /*
45 module handle for dynamically loaded directdraw library
46 */
47 static HMODULE g_hmodDirectDraw = NULL;
48
49 /*
50 * Detect engines supported by current Windows version
51 * DirectDraw version and hardware
52 */
53
54 void
winDetectSupportedEngines(void)55 winDetectSupportedEngines(void)
56 {
57 /* Initialize the engine support flags */
58 g_dwEnginesSupported = WIN_SERVER_SHADOW_GDI;
59
60 /* Do we have DirectDraw? */
61 if (g_hmodDirectDraw != NULL) {
62 LPDIRECTDRAW lpdd = NULL;
63 LPDIRECTDRAW4 lpdd4 = NULL;
64 HRESULT ddrval;
65
66 /* Was the DirectDrawCreate function found? */
67 if (g_fpDirectDrawCreate == NULL) {
68 /* No DirectDraw support */
69 return;
70 }
71
72 /* DirectDrawCreate exists, try to call it */
73 /* Create a DirectDraw object, store the address at lpdd */
74 ddrval = (*g_fpDirectDrawCreate) (NULL, (void **) &lpdd, NULL);
75 if (FAILED(ddrval)) {
76 /* No DirectDraw support */
77 winErrorFVerb(2,
78 "winDetectSupportedEngines - DirectDraw not installed\n");
79 return;
80 }
81
82 /* Try to query for DirectDraw4 interface */
83 ddrval = IDirectDraw_QueryInterface(lpdd,
84 &IID_IDirectDraw4,
85 (LPVOID *) &lpdd4);
86 if (SUCCEEDED(ddrval)) {
87 /* We have DirectDraw4 */
88 winErrorFVerb(2,
89 "winDetectSupportedEngines - DirectDraw4 installed, allowing ShadowDDNL\n");
90 g_dwEnginesSupported |= WIN_SERVER_SHADOW_DDNL;
91 }
92
93 /* Cleanup DirectDraw interfaces */
94 if (lpdd4 != NULL)
95 IDirectDraw_Release(lpdd4);
96 if (lpdd != NULL)
97 IDirectDraw_Release(lpdd);
98 }
99
100 winErrorFVerb(2,
101 "winDetectSupportedEngines - Returning, supported engines %08x\n",
102 (unsigned int) g_dwEnginesSupported);
103 }
104
105 /*
106 * Set the engine type, depending on the engines
107 * supported for this screen, and whether the user
108 * suggested an engine type
109 */
110
111 Bool
winSetEngine(ScreenPtr pScreen)112 winSetEngine(ScreenPtr pScreen)
113 {
114 winScreenPriv(pScreen);
115 winScreenInfo *pScreenInfo = pScreenPriv->pScreenInfo;
116 HDC hdc;
117 DWORD dwBPP;
118
119 /* Get a DC */
120 hdc = GetDC(NULL);
121 if (hdc == NULL) {
122 ErrorF("winSetEngine - Couldn't get an HDC\n");
123 return FALSE;
124 }
125
126 /*
127 * pScreenInfo->dwBPP may be 0 to indicate that the current screen
128 * depth is to be used. Thus, we must query for the current display
129 * depth here.
130 */
131 dwBPP = GetDeviceCaps(hdc, BITSPIXEL);
132
133 /* Release the DC */
134 ReleaseDC(NULL, hdc);
135 hdc = NULL;
136
137 /* ShadowGDI is the only engine that supports windowed PseudoColor */
138 if (dwBPP == 8 && !pScreenInfo->fFullScreen) {
139 winErrorFVerb(2,
140 "winSetEngine - Windowed && PseudoColor => ShadowGDI\n");
141 pScreenInfo->dwEngine = WIN_SERVER_SHADOW_GDI;
142
143 /* Set engine function pointers */
144 winSetEngineFunctionsShadowGDI(pScreen);
145 return TRUE;
146 }
147
148 /* ShadowGDI is the only engine that supports Multi Window Mode */
149 if (FALSE
150 || pScreenInfo->fMultiWindow
151 ) {
152 winErrorFVerb(2,
153 "winSetEngine - Multi Window or Rootless => ShadowGDI\n");
154 pScreenInfo->dwEngine = WIN_SERVER_SHADOW_GDI;
155
156 /* Set engine function pointers */
157 winSetEngineFunctionsShadowGDI(pScreen);
158 return TRUE;
159 }
160
161 /* If the user's choice is supported, we'll use that */
162 if (g_dwEnginesSupported & pScreenInfo->dwEnginePreferred) {
163 winErrorFVerb(2, "winSetEngine - Using user's preference: %d\n",
164 (int) pScreenInfo->dwEnginePreferred);
165 pScreenInfo->dwEngine = pScreenInfo->dwEnginePreferred;
166
167 /* Setup engine function pointers */
168 switch (pScreenInfo->dwEngine) {
169 case WIN_SERVER_SHADOW_GDI:
170 winSetEngineFunctionsShadowGDI(pScreen);
171 break;
172 case WIN_SERVER_SHADOW_DDNL:
173 winSetEngineFunctionsShadowDDNL(pScreen);
174 break;
175 default:
176 FatalError("winSetEngine - Invalid engine type\n");
177 }
178 return TRUE;
179 }
180
181 /* ShadowDDNL has good performance, so why not */
182 if (g_dwEnginesSupported & WIN_SERVER_SHADOW_DDNL) {
183 winErrorFVerb(2, "winSetEngine - Using Shadow DirectDraw NonLocking\n");
184 pScreenInfo->dwEngine = WIN_SERVER_SHADOW_DDNL;
185
186 /* Set engine function pointers */
187 winSetEngineFunctionsShadowDDNL(pScreen);
188 return TRUE;
189 }
190
191 /* ShadowGDI is next in line */
192 if (g_dwEnginesSupported & WIN_SERVER_SHADOW_GDI) {
193 winErrorFVerb(2, "winSetEngine - Using Shadow GDI DIB\n");
194 pScreenInfo->dwEngine = WIN_SERVER_SHADOW_GDI;
195
196 /* Set engine function pointers */
197 winSetEngineFunctionsShadowGDI(pScreen);
198 return TRUE;
199 }
200
201 return FALSE;
202 }
203
204 /*
205 * Get procedure addresses for DirectDrawCreate and DirectDrawCreateClipper
206 */
207
208 Bool
winGetDDProcAddresses(void)209 winGetDDProcAddresses(void)
210 {
211 Bool fReturn = TRUE;
212
213 /* Load the DirectDraw library */
214 g_hmodDirectDraw = LoadLibraryEx("ddraw.dll", NULL, 0);
215 if (g_hmodDirectDraw == NULL) {
216 ErrorF("winGetDDProcAddresses - Could not load ddraw.dll\n");
217 fReturn = TRUE;
218 goto winGetDDProcAddresses_Exit;
219 }
220
221 /* Try to get the DirectDrawCreate address */
222 g_fpDirectDrawCreate = GetProcAddress(g_hmodDirectDraw, "DirectDrawCreate");
223 if (g_fpDirectDrawCreate == NULL) {
224 ErrorF("winGetDDProcAddresses - Could not get DirectDrawCreate "
225 "address\n");
226 fReturn = TRUE;
227 goto winGetDDProcAddresses_Exit;
228 }
229
230 /* Try to get the DirectDrawCreateClipper address */
231 g_fpDirectDrawCreateClipper = GetProcAddress(g_hmodDirectDraw,
232 "DirectDrawCreateClipper");
233 if (g_fpDirectDrawCreateClipper == NULL) {
234 ErrorF("winGetDDProcAddresses - Could not get "
235 "DirectDrawCreateClipper address\n");
236 fReturn = FALSE;
237 goto winGetDDProcAddresses_Exit;
238 }
239
240 /*
241 * Note: Do not unload ddraw.dll here. Do it in GiveUp
242 */
243
244 winGetDDProcAddresses_Exit:
245 /* Unload the DirectDraw library if we failed to initialize */
246 if (!fReturn && g_hmodDirectDraw != NULL) {
247 FreeLibrary(g_hmodDirectDraw);
248 g_hmodDirectDraw = NULL;
249 }
250
251 return fReturn;
252 }
253
254 void
winReleaseDDProcAddresses(void)255 winReleaseDDProcAddresses(void)
256 {
257 if (g_hmodDirectDraw != NULL) {
258 FreeLibrary(g_hmodDirectDraw);
259 g_hmodDirectDraw = NULL;
260 g_fpDirectDrawCreate = NULL;
261 g_fpDirectDrawCreateClipper = NULL;
262 }
263 }
264