summaryrefslogtreecommitdiff
path: root/src/mesa/pipe/xlib/xm_winsys.c
blob: 295174d4bbacf58103198abbd563edc6471fecee (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
/**************************************************************************
 * 
 * Copyright 2007 Tungsten Graphics, Inc., Bismarck, ND., USA
 * All Rights Reserved.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 
 * USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 * 
 * 
 **************************************************************************/

/*
 * Authors:
 *   Keith Whitwell
 *   Brian Paul
 */


#include "glxheader.h"
#include "xmesaP.h"
#include "main/macros.h"

#include "pipe/p_winsys.h"
#include "pipe/softpipe/sp_winsys.h"


/**
 * Low-level OS/window system memory buffer
 */
struct xm_buffer
{
   boolean userBuffer;  /** Is this a user-space buffer? */
   int refcount;
   unsigned size;
   void *data;
   void *mapped;
};



/* Turn the softpipe opaque buffer pointer into a dri_bufmgr opaque
 * buffer pointer...
 */
static inline struct xm_buffer *
xm_bo( struct pipe_buffer_handle *bo )
{
   return (struct xm_buffer *) bo;
}

static inline struct pipe_buffer_handle *
pipe_bo( struct xm_buffer *bo )
{
   return (struct pipe_buffer_handle *) bo;
}


/* Most callbacks map direcly onto dri_bufmgr operations:
 */
static void *
xm_buffer_map(struct pipe_winsys *pws, struct pipe_buffer_handle *buf,
              unsigned flags)
{
   struct xm_buffer *xm_buf = xm_bo(buf);
   xm_buf->mapped = xm_buf->data;
   return xm_buf->mapped;
}

static void
xm_buffer_unmap(struct pipe_winsys *pws, struct pipe_buffer_handle *buf)
{
   struct xm_buffer *xm_buf = xm_bo(buf);
   xm_buf->mapped = NULL;
}

static void
xm_buffer_reference(struct pipe_winsys *pws,
                    struct pipe_buffer_handle **ptr,
                    struct pipe_buffer_handle *buf)
{
   if (*ptr) {
      struct xm_buffer *oldBuf = xm_bo(*ptr);
      oldBuf->refcount--;
      assert(oldBuf->refcount >= 0);
      if (oldBuf->refcount == 0) {
         if (oldBuf->data) {
            if (!oldBuf->userBuffer)
               free(oldBuf->data);
            oldBuf->data = NULL;
         }
         free(oldBuf);
      }
      *ptr = NULL;
   }

   assert(!(*ptr));

   if (buf) {
      struct xm_buffer *newBuf = xm_bo(buf);
      newBuf->refcount++;
      *ptr = buf;
   }
}

static void
xm_buffer_data(struct pipe_winsys *pws, struct pipe_buffer_handle *buf,
               unsigned size, const void *data, unsigned usage )
{
   struct xm_buffer *xm_buf = xm_bo(buf);
   assert(!xm_buf->userBuffer);
   if (xm_buf->size != size) {
      if (xm_buf->data)
         free(xm_buf->data);
      xm_buf->data = malloc(size);
      xm_buf->size = size;
   }
   if (data)
      memcpy(xm_buf->data, data, size);
}

static void
xm_buffer_subdata(struct pipe_winsys *pws, struct pipe_buffer_handle *buf,
                  unsigned long offset, unsigned long size, const void *data)
{
   struct xm_buffer *xm_buf = xm_bo(buf);
   GLubyte *b = (GLubyte *) xm_buf->data;
   assert(!xm_buf->userBuffer);
   assert(b);
   memcpy(b + offset, data, size);
}

static void
xm_buffer_get_subdata(struct pipe_winsys *pws, struct pipe_buffer_handle *buf,
                      unsigned long offset, unsigned long size, void *data)
{
   const struct xm_buffer *xm_buf = xm_bo(buf);
   const GLubyte *b = (GLubyte *) xm_buf->data;
   assert(!xm_buf->userBuffer);
   assert(b);
   memcpy(data, b + offset, size);
}

static void
xm_flush_frontbuffer(struct pipe_winsys *pws,
                     struct pipe_surface *surf,
                     void *context_private)
{
   /* The Xlib driver's front color surfaces are actually X Windows so
    * this flush is a no-op.
    * If we instead did front buffer rendering to a temporary XImage,
    * this would be the place to copy the Ximage to the on-screen Window.
    */
}


static void
xm_printf(struct pipe_winsys *pws, const char *fmtString, ...)
{
   va_list args;
   va_start( args, fmtString );  
   vfprintf(stderr, fmtString, args);
   va_end( args );
}

static const char *
xm_get_name(struct pipe_winsys *pws)
{
   return "Xlib";
}


static struct pipe_buffer_handle *
xm_buffer_create(struct pipe_winsys *pws, unsigned flags)
{
   struct xm_buffer *buffer = CALLOC_STRUCT(xm_buffer);
   buffer->refcount = 1;
   return pipe_bo(buffer);
}


/**
 * Create buffer which wraps user-space data.
 */
static struct pipe_buffer_handle *
xm_user_buffer_create(struct pipe_winsys *pws, void *ptr, unsigned bytes)
{
   struct xm_buffer *buffer = CALLOC_STRUCT(xm_buffer);
   buffer->userBuffer = TRUE;
   buffer->refcount = 1;
   buffer->data = ptr;
   buffer->size = bytes;
   return pipe_bo(buffer);
}



/**
 * Round n up to next multiple.
 */
static INLINE unsigned
round_up(unsigned n, unsigned multiple)
{
   return (n + multiple - 1) & ~(multiple - 1);
}


static unsigned
xm_surface_pitch(struct pipe_winsys *winsys, unsigned cpp, unsigned width,
		 unsigned flags)
{
   return round_up(width, 64 / cpp);
}


/**
 * Called via pipe->surface_alloc() to create new surfaces (textures,
 * renderbuffers, etc.
 */
static struct pipe_surface *
xm_surface_alloc(struct pipe_winsys *ws, GLuint pipeFormat)
{
   struct xmesa_surface *xms = CALLOC_STRUCT(xmesa_surface);

   assert(ws);
   assert(pipeFormat);

   xms->surface.format = pipeFormat;
   xms->surface.refcount = 1;
   xms->surface.winsys = ws;
#if 0
   /*
    * This is really just a softpipe surface, not an XImage/Pixmap surface.
    */
   softpipe_init_surface_funcs(&xms->surface);
#endif
   return &xms->surface;
}



static void
xm_surface_release(struct pipe_winsys *winsys, struct pipe_surface **s)
{
   struct pipe_surface *surf = *s;
   surf->refcount--;
   if (surf->refcount == 0) {
      if (surf->buffer)
	 winsys->buffer_reference(winsys, &surf->buffer, NULL);
      free(surf);
   }
   *s = NULL;
}



/**
 * Return pointer to a pipe_winsys object.
 * For Xlib, this is a singleton object.
 * Nothing special for the Xlib driver so no subclassing or anything.
 */
struct pipe_winsys *
xmesa_get_pipe_winsys(void)
{
   static struct pipe_winsys *ws = NULL;

   if (!ws) {
      ws = CALLOC_STRUCT(pipe_winsys);
   
      /* Fill in this struct with callbacks that pipe will need to
       * communicate with the window system, buffer manager, etc. 
       */
      ws->buffer_create = xm_buffer_create;
      ws->user_buffer_create = xm_user_buffer_create;
      ws->buffer_map = xm_buffer_map;
      ws->buffer_unmap = xm_buffer_unmap;
      ws->buffer_reference = xm_buffer_reference;
      ws->buffer_data = xm_buffer_data;
      ws->buffer_subdata = xm_buffer_subdata;
      ws->buffer_get_subdata = xm_buffer_get_subdata;

      ws->surface_pitch = xm_surface_pitch;
      ws->surface_alloc = xm_surface_alloc;
      ws->surface_release = xm_surface_release;

      ws->flush_frontbuffer = xm_flush_frontbuffer;
      ws->printf = xm_printf;
      ws->get_name = xm_get_name;
   }

   return ws;
}


/**
 * XXX this depends on the depths supported by the screen (8/16/32/etc).
 * Maybe when we're about to create a context/drawable we create a new
 * softpipe_winsys object that corresponds to the specified screen...
 *
 * Also, this query only really matters for on-screen drawables.
 * For textures and FBOs we (softpipe) can support any format.o
 */
static boolean
xmesa_is_format_supported(struct softpipe_winsys *sws, uint format)
{
   /* Any format supported by softpipe can be listed here.
    * This query is not used for allocating window-system color buffers
    * (which would depend on the screen depth/bpp).
    */
   switch (format) {
   case PIPE_FORMAT_U_A8_R8_G8_B8:
   case PIPE_FORMAT_S_R16_G16_B16_A16:
   case PIPE_FORMAT_S8_Z24:
   case PIPE_FORMAT_U_S8:
   case PIPE_FORMAT_U_Z16:
   case PIPE_FORMAT_U_Z32:
      return TRUE;
   default:
      return FALSE;
   };
}


/**
 * Return pointer to a softpipe_winsys object.
 * For Xlib, this is a singleton object.
 */
static struct softpipe_winsys *
xmesa_get_softpipe_winsys(void)
{
   static struct softpipe_winsys *spws = NULL;

   if (!spws) {
      spws = CALLOC_STRUCT(softpipe_winsys);
      if (spws) {
         spws->is_format_supported = xmesa_is_format_supported;
      }
   }

   return spws;
}


struct pipe_context *
xmesa_create_context(XMesaContext xmesa)
{
   struct pipe_winsys *pws = xmesa_get_pipe_winsys();
   struct softpipe_winsys *spws = xmesa_get_softpipe_winsys();
   
   return softpipe_create( pws, spws );
}