choosevisual.c@ 51616

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

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source: vbox/trunk/src/VBox/GuestHost/OpenGL/spu_loader/choosevisual.c@ 51616

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