choosevisual.c@ 78263

最後變更在這個檔案從78263是 78263,由 vboxsync 提交於 6 年前
Config.kmk,GuestHost\OpenGL,HostServices\SharedOpenGL: Fix a bunch of compiler warnings and enable them again
屬性 svn:eol-style 設為 `native` 屬性 svn:keywords 設為 `Id Revision`
檔案大小: 7.6 KB

行
1
2	#include "chromium.h"
3	#include "cr_spu.h"
4	#include "cr_error.h"
5	#include "cr_string.h"
6
7
8	/**
9	* Wrappers for glXChooseVisual/etc.
10	*
11	* By using this function, the fake GLX, render SPU, tilesort SPU,
12	* etc can be assured of getting the same GLX visual for a set of CR_*_BIT
13	* visual flags. This helps ensure that render_to_app_window will work
14	* properly.
15	*/
16
17
18	#if defined(WINDOWS)
19	int
20	crChooseVisual(const crOpenGLInterface *ws, int visBits)
21	{
22	/* placeholder */
23	RT_NOREF(ws, visBits);
24	return 0;
25	}
26	#endif
27
28
29	#if defined(DARWIN)
30	int
31	crChooseVisual(const crOpenGLInterface *ws, int visBits)
32	{
33	/* placeholder */
34	return 0;
35	}
36	#endif
37
38
39	#if defined(GLX)
40
41	XVisualInfo *
42	crChooseVisual(const crOpenGLInterface ws, Display dpy, int screen,
43	GLboolean directColor, int visBits)
44	{
45	XVisualInfo *vis;
46	int errorBase, eventBase;
47
48	if (ws->glXQueryExtension(dpy, &errorBase, &eventBase))
49	{
50
51	if (ws->glXChooseVisual)
52	{
53	/* Use the real OpenGL's glXChooseVisual function */
54	int attribList[100];
55	int i = 0;
56
57	/* Build the attribute list */
58	if (visBits & CR_RGB_BIT)
59	{
60	attribList[i++] = GLX_RGBA;
61	attribList[i++] = GLX_RED_SIZE;
62	attribList[i++] = 1;
63	attribList[i++] = GLX_GREEN_SIZE;
64	attribList[i++] = 1;
65	attribList[i++] = GLX_BLUE_SIZE;
66	attribList[i++] = 1;
67	}
68
69	if (visBits & CR_ALPHA_BIT)
70	{
71	attribList[i++] = GLX_ALPHA_SIZE;
72	attribList[i++] = 1;
73	}
74
75	if (visBits & CR_DOUBLE_BIT)
76	{
77	attribList[i++] = GLX_DOUBLEBUFFER;
78	}
79
80	if (visBits & CR_STEREO_BIT)
81	{
82	attribList[i++] = GLX_STEREO;
83	}
84
85	if (visBits & CR_DEPTH_BIT)
86	{
87	attribList[i++] = GLX_DEPTH_SIZE;
88	attribList[i++] = 1;
89	}
90
91	if (visBits & CR_STENCIL_BIT)
92	{
93	attribList[i++] = GLX_STENCIL_SIZE;
94	attribList[i++] = 1;
95	}
96
97	if (visBits & CR_ACCUM_BIT)
98	{
99	attribList[i++] = GLX_ACCUM_RED_SIZE;
100	attribList[i++] = 1;
101	attribList[i++] = GLX_ACCUM_GREEN_SIZE;
102	attribList[i++] = 1;
103	attribList[i++] = GLX_ACCUM_BLUE_SIZE;
104	attribList[i++] = 1;
105	if (visBits & CR_ALPHA_BIT)
106	{
107	attribList[i++] = GLX_ACCUM_ALPHA_SIZE;
108	attribList[i++] = 1;
109	}
110	}
111
112	if (visBits & CR_MULTISAMPLE_BIT)
113	{
114	attribList[i++] = GLX_SAMPLE_BUFFERS_SGIS;
115	attribList[i++] = 1;
116	attribList[i++] = GLX_SAMPLES_SGIS;
117	attribList[i++] = 4;
118	}
119
120	if (visBits & CR_OVERLAY_BIT)
121	{
122	attribList[i++] = GLX_LEVEL;
123	attribList[i++] = 1;
124	}
125
126	if (directColor)
127	{
128	/*
129	* See if we have have GLX_EXT_visual_info so we
130	* can grab a Direct Color visual
131	*/
132	#ifdef GLX_EXT_visual_info
133	if (crStrstr(ws->glXQueryExtensionsString(dpy, screen),
134	"GLX_EXT_visual_info"))
135	{
136	attribList[i++] = GLX_X_VISUAL_TYPE_EXT;
137	attribList[i++] = GLX_DIRECT_COLOR_EXT;
138	}
139	#endif
140	}
141
142	/* End the list */
143	attribList[i++] = None;
144
145	vis = ws->glXChooseVisual(dpy, screen, attribList);
146	return vis;
147	}
148	else
149	{
150	/* Don't use glXChooseVisual, use glXGetConfig.
151	*
152	* Here's the deal:
153	* Some (all?) versions of the libGL.so that's shipped with ATI's
154	* drivers aren't built with the -Bsymbolic flag. That's bad.
155	*
156	* If we call the glXChooseVisual() function that's built into ATI's
157	* libGL, it in turn calls the glXGetConfig() function. Now, there's
158	* a glXGetConfig function in libGL.so AND there's a glXGetConfig
159	* function in Chromium's libcrfaker.so library. Unfortunately, the
160	* later one gets called instead of the former. At this point, things
161	* go haywire. If -Bsymbolic were used, this would not happen.
162	*/
163	XVisualInfo templateVis;
164	long templateFlags;
165	int count, i, visType;
166
167	visType = directColor ? DirectColor : TrueColor;
168
169	/* Get list of candidate visuals */
170	templateFlags = VisualScreenMask \| VisualClassMask;
171	templateVis.screen = screen;
172	#if defined(__cplusplus) \|\| defined(c_plusplus)
173	templateVis.c_class = visType;
174	#else
175	templateVis.class = visType;
176	#endif
177
178	vis = XGetVisualInfo(dpy, templateFlags, &templateVis, &count);
179	/* find first visual that's good enough */
180	for (i = 0; i < count; i++)
181	{
182	int val;
183
184	/* Need exact match on RGB, DOUBLEBUFFER, STEREO, LEVEL, MULTISAMPLE */
185	ws->glXGetConfig(dpy, vis + i, GLX_RGBA, &val);
186	if (((visBits & CR_RGB_BIT) && !val) \|\|
187	(((visBits & CR_RGB_BIT) == 0) && val))
188	{
189	continue;
190	}
191
192	ws->glXGetConfig(dpy, vis + i, GLX_DOUBLEBUFFER, &val);
193	if (((visBits & CR_DOUBLE_BIT) && !val) \|\|
194	(((visBits & CR_DOUBLE_BIT) == 0) && val))
195	{
196	continue;
197	}
198
199	ws->glXGetConfig(dpy, vis + i, GLX_STEREO, &val);
200	if (((visBits & CR_STEREO_BIT) && !val) \|\|
201	(((visBits & CR_STEREO_BIT) == 0) && val))
202	{
203	continue;
204	}
205
206	ws->glXGetConfig(dpy, vis + i, GLX_LEVEL, &val);
207	if (((visBits & CR_OVERLAY_BIT) && !val) \|\|
208	(((visBits & CR_OVERLAY_BIT) == 0) && val))
209	{
210	continue;
211	}
212
213	ws->glXGetConfig(dpy, vis + i, GLX_SAMPLE_BUFFERS_SGIS, &val);
214	if (visBits & CR_MULTISAMPLE_BIT)
215	{
216	if (!val)
217	continue;
218	ws->glXGetConfig(dpy, vis + i, GLX_SAMPLES_SGIS, &val);
219	if (val < 4)
220	continue;
221	}
222	else {
223	/* don't want multisample */
224	if (val)
225	continue;
226	}
227
228	/* Need good enough for ALPHA, DEPTH, STENCIL, ACCUM */
229	if (visBits & CR_ALPHA_BIT)
230	{
231	ws->glXGetConfig(dpy, vis + i, GLX_ALPHA_SIZE, &val);
232	if (!val)
233	continue;
234	}
235
236	if (visBits & CR_DEPTH_BIT)
237	{
238	ws->glXGetConfig(dpy, vis + i, GLX_DEPTH_SIZE, &val);
239	if (!val)
240	continue;
241	}
242
243	if (visBits & CR_STENCIL_BIT)
244	{
245	ws->glXGetConfig(dpy, vis + i, GLX_STENCIL_SIZE, &val);
246	if (!val)
247	continue;
248	}
249
250	if (visBits & CR_ACCUM_BIT)
251	{
252	ws->glXGetConfig(dpy, vis + i, GLX_ACCUM_RED_SIZE, &val);
253	if (!val)
254	continue;
255	if (visBits & CR_ALPHA_BIT)
256	{
257	ws->glXGetConfig(dpy, vis + i, GLX_ACCUM_ALPHA_SIZE, &val);
258	if (!val)
259	continue;
260	}
261	}
262
263	/* If we get here, we found a good visual.
264	* Now, we need to get a new XVisualInfo pointer in case the caller
265	* calls XFree on it.
266	*/
267	templateFlags = VisualScreenMask \| VisualIDMask;
268	templateVis.screen = screen;
269	templateVis.visualid = vis[i].visual->visualid;
270	XFree(vis); /* free the list */
271	vis = XGetVisualInfo(dpy, templateFlags, &templateVis, &count);
272	return vis;
273	}
274
275	/* if we get here, we failed to find a sufficient visual */
276	return NULL;
277	}
278	}
279	else
280	{
281	/* use Xlib instead of GLX */
282	XVisualInfo templateVis, *best;
283	long templateFlags;
284	int i, count, visType;
285
286	if (visBits & CR_RGB_BIT)
287	visType = directColor ? DirectColor : TrueColor;
288	else
289	visType = PseudoColor;
290
291	/* Get list of candidate visuals */
292	templateFlags = VisualScreenMask \| VisualClassMask;
293	templateVis.screen = screen;
294	#if defined(__cplusplus) \|\| defined(c_plusplus)
295	templateVis.c_class = visType;
296	#else
297	templateVis.class = visType;
298	#endif
299
300	vis = XGetVisualInfo(dpy, templateFlags, &templateVis, &count);
301	if (!vis)
302	return NULL;
303
304	/* okay, select the RGB visual with the most depth */
305	best = vis + 0;
306	for (i = 1; i < count; i++)
307	{
308	if (vis[i].depth > best->depth &&
309	vis[i].bits_per_rgb > best->bits_per_rgb )
310	best = vis + i;
311	}
312
313	if (best)
314	{
315	/* If we get here, we found a good visual.
316	* Now, we need to get a new XVisualInfo pointer in case the caller
317	* calls XFree on it.
318	*/
319	templateFlags = VisualScreenMask \| VisualIDMask;
320	templateVis.screen = screen;
321	templateVis.visualid = best->visualid;
322	XFree(vis); /* free the list */
323	best = XGetVisualInfo(dpy, templateFlags, &templateVis, &count);
324	}
325
326	return best;
327	}
328	}
329
330	#endif /* GLX */

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source: vbox/trunk/src/VBox/GuestHost/OpenGL/spu_loader/choosevisual.c@ 78263

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