xm_st.c revision 685bb6941681f89f71a9169594d87c8e314b94d0 
1/*
2 * Mesa 3-D graphics library
3 * Version:  7.9
4 *
5 * Copyright (C) 2010 LunarG Inc.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
22 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
23 * DEALINGS IN THE SOFTWARE.
24 *
25 * Authors:
26 *    Chia-I Wu <olv@lunarg.com>
27 */
28
29#include "util/u_memory.h"
30#include "util/u_inlines.h"
31
32#include "xm_api.h"
33#include "xm_st.h"
34
35struct xmesa_st_framebuffer {
36   XMesaDisplay display;
37   XMesaBuffer buffer;
38   struct pipe_screen *screen;
39
40   struct st_visual stvis;
41
42   unsigned texture_width, texture_height, texture_mask;
43   struct pipe_resource *textures[ST_ATTACHMENT_COUNT];
44
45   struct pipe_surface *display_surface;
46};
47
48static INLINE struct xmesa_st_framebuffer *
49xmesa_st_framebuffer(struct st_framebuffer_iface *stfbi)
50{
51   return (struct xmesa_st_framebuffer *) stfbi->st_manager_private;
52}
53
54/**
55 * Display an attachment to the xlib_drawable of the framebuffer.
56 */
57static boolean
58xmesa_st_framebuffer_display(struct st_framebuffer_iface *stfbi,
59                             enum st_attachment_type statt)
60{
61   struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
62   struct pipe_resource *ptex = xstfb->textures[statt];
63   struct pipe_surface *psurf;
64
65   if (!ptex)
66      return TRUE;
67
68   psurf = xstfb->display_surface;
69   /* (re)allocate the surface for the texture to be displayed */
70   if (!psurf || psurf->texture != ptex) {
71      pipe_surface_reference(&xstfb->display_surface, NULL);
72
73      psurf = xstfb->screen->get_tex_surface(xstfb->screen,
74            ptex, 0, 0, 0, PIPE_BIND_DISPLAY_TARGET);
75      if (!psurf)
76         return FALSE;
77
78      xstfb->display_surface = psurf;
79   }
80
81   xstfb->screen->flush_frontbuffer(xstfb->screen, psurf, &xstfb->buffer->ws);
82
83   return TRUE;
84}
85
86/**
87 * Copy the contents between the attachments.
88 */
89static void
90xmesa_st_framebuffer_copy_textures(struct st_framebuffer_iface *stfbi,
91                                   enum st_attachment_type src_statt,
92                                   enum st_attachment_type dst_statt,
93                                   unsigned x, unsigned y,
94                                   unsigned width, unsigned height)
95{
96   struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
97   struct pipe_resource *src_ptex = xstfb->textures[src_statt];
98   struct pipe_resource *dst_ptex = xstfb->textures[dst_statt];
99   struct pipe_subresource subsrc, subdst;
100   struct pipe_context *pipe;
101
102   if (!src_ptex || !dst_ptex)
103      return;
104
105   pipe = xstfb->display->pipe;
106   if (!pipe) {
107      pipe = xstfb->screen->context_create(xstfb->screen, NULL);
108      if (!pipe)
109         return;
110      xstfb->display->pipe = pipe;
111   }
112
113   subsrc.face = 0;
114   subsrc.level = 0;
115   subdst.face = 0;
116   subdst.level = 0;
117
118   if (src_ptex && dst_ptex)
119      pipe->resource_copy_region(pipe, dst_ptex, subdst, x, y, 0,
120                                 src_ptex, subsrc, x, y, 0, width, height);
121}
122
123/**
124 * Remove outdated textures and create the requested ones.
125 */
126static boolean
127xmesa_st_framebuffer_validate_textures(struct st_framebuffer_iface *stfbi,
128                                       unsigned width, unsigned height,
129                                       unsigned mask)
130{
131   struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
132   struct pipe_resource templ;
133   enum st_attachment_type i;
134
135   /* remove outdated textures */
136   if (xstfb->texture_width != width || xstfb->texture_height != height) {
137      for (i = 0; i < ST_ATTACHMENT_COUNT; i++)
138         pipe_resource_reference(&xstfb->textures[i], NULL);
139   }
140
141   memset(&templ, 0, sizeof(templ));
142   templ.target = PIPE_TEXTURE_2D;
143   templ.width0 = width;
144   templ.height0 = height;
145   templ.depth0 = 1;
146   templ.last_level = 0;
147
148   for (i = 0; i < ST_ATTACHMENT_COUNT; i++) {
149      enum pipe_format format;
150      unsigned bind;
151
152      /* the texture already exists or not requested */
153      if (xstfb->textures[i] || !(mask & (1 << i))) {
154         /* remember the texture */
155         if (xstfb->textures[i])
156            mask |= (1 << i);
157         continue;
158      }
159
160      switch (i) {
161      case ST_ATTACHMENT_FRONT_LEFT:
162      case ST_ATTACHMENT_BACK_LEFT:
163      case ST_ATTACHMENT_FRONT_RIGHT:
164      case ST_ATTACHMENT_BACK_RIGHT:
165         format = xstfb->stvis.color_format;
166         bind = PIPE_BIND_DISPLAY_TARGET |
167                     PIPE_BIND_RENDER_TARGET;
168         break;
169      case ST_ATTACHMENT_DEPTH_STENCIL:
170         format = xstfb->stvis.depth_stencil_format;
171         bind = PIPE_BIND_DEPTH_STENCIL;
172         break;
173      default:
174         format = PIPE_FORMAT_NONE;
175         break;
176      }
177
178      if (format != PIPE_FORMAT_NONE) {
179         templ.format = format;
180         templ.bind = bind;
181
182         xstfb->textures[i] =
183            xstfb->screen->resource_create(xstfb->screen, &templ);
184         if (!xstfb->textures[i])
185            return FALSE;
186      }
187   }
188
189   xstfb->texture_width = width;
190   xstfb->texture_height = height;
191   xstfb->texture_mask = mask;
192
193   return TRUE;
194}
195
196static boolean
197xmesa_st_framebuffer_validate(struct st_framebuffer_iface *stfbi,
198                              const enum st_attachment_type *statts,
199                              unsigned count,
200                              struct pipe_resource **out)
201{
202   struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
203   unsigned statt_mask, new_mask, i;
204   boolean resized;
205   boolean ret;
206
207   statt_mask = 0x0;
208   for (i = 0; i < count; i++)
209      statt_mask |= 1 << statts[i];
210   /* record newly allocated textures */
211   new_mask = statt_mask & ~xstfb->texture_mask;
212
213   resized = (xstfb->buffer->width != xstfb->texture_width ||
214              xstfb->buffer->height != xstfb->texture_height);
215
216   /* revalidate textures */
217   if (resized || new_mask) {
218      ret = xmesa_st_framebuffer_validate_textures(stfbi,
219                  xstfb->buffer->width, xstfb->buffer->height, statt_mask);
220      if (!ret)
221         return ret;
222
223      if (!resized) {
224         enum st_attachment_type back, front;
225
226         back = ST_ATTACHMENT_BACK_LEFT;
227         front = ST_ATTACHMENT_FRONT_LEFT;
228         /* copy the contents if front is newly allocated and back is not */
229         if ((statt_mask & (1 << back)) &&
230             (new_mask & (1 << front)) &&
231             !(new_mask & (1 << back))) {
232            xmesa_st_framebuffer_copy_textures(stfbi, back, front,
233                  0, 0, xstfb->texture_width, xstfb->texture_height);
234         }
235      }
236   }
237
238   for (i = 0; i < count; i++) {
239      out[i] = NULL;
240      pipe_resource_reference(&out[i], xstfb->textures[statts[i]]);
241   }
242
243   return TRUE;
244}
245
246static boolean
247xmesa_st_framebuffer_flush_front(struct st_framebuffer_iface *stfbi,
248                                 enum st_attachment_type statt)
249{
250   struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
251   boolean ret;
252
253   ret = xmesa_st_framebuffer_display(stfbi, statt);
254   if (ret)
255      xmesa_check_buffer_size(xstfb->buffer);
256
257   return ret;
258}
259
260struct st_framebuffer_iface *
261xmesa_create_st_framebuffer(XMesaDisplay xmdpy, XMesaBuffer b)
262{
263   struct st_framebuffer_iface *stfbi;
264   struct xmesa_st_framebuffer *xstfb;
265
266   assert(xmdpy->display == b->xm_visual->display);
267
268   stfbi = CALLOC_STRUCT(st_framebuffer_iface);
269   xstfb = CALLOC_STRUCT(xmesa_st_framebuffer);
270   if (!stfbi || !xstfb) {
271      if (stfbi)
272         FREE(stfbi);
273      if (xstfb)
274         FREE(xstfb);
275      return NULL;
276   }
277
278   xstfb->display = xmdpy;
279   xstfb->buffer = b;
280   xstfb->screen = xmdpy->screen;
281   xstfb->stvis = b->xm_visual->stvis;
282
283   stfbi->visual = &xstfb->stvis;
284   stfbi->flush_front = xmesa_st_framebuffer_flush_front;
285   stfbi->validate = xmesa_st_framebuffer_validate;
286   stfbi->st_manager_private = (void *) xstfb;
287
288   return stfbi;
289}
290
291void
292xmesa_destroy_st_framebuffer(struct st_framebuffer_iface *stfbi)
293{
294   struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
295   int i;
296
297   pipe_surface_reference(&xstfb->display_surface, NULL);
298
299   for (i = 0; i < ST_ATTACHMENT_COUNT; i++)
300      pipe_resource_reference(&xstfb->textures[i], NULL);
301
302   FREE(xstfb);
303   FREE(stfbi);
304}
305
306void
307xmesa_swap_st_framebuffer(struct st_framebuffer_iface *stfbi)
308{
309   struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
310   boolean ret;
311
312   ret = xmesa_st_framebuffer_display(stfbi, ST_ATTACHMENT_BACK_LEFT);
313   if (ret) {
314      struct pipe_resource **front, **back, *tmp;
315
316      front = &xstfb->textures[ST_ATTACHMENT_FRONT_LEFT];
317      back = &xstfb->textures[ST_ATTACHMENT_BACK_LEFT];
318      /* swap textures only if the front texture has been allocated */
319      if (*front) {
320         tmp = *front;
321         *front = *back;
322         *back = tmp;
323      }
324
325      xmesa_check_buffer_size(xstfb->buffer);
326   }
327}
328
329void
330xmesa_copy_st_framebuffer(struct st_framebuffer_iface *stfbi,
331                          enum st_attachment_type src,
332                          enum st_attachment_type dst,
333                          int x, int y, int w, int h)
334{
335   xmesa_st_framebuffer_copy_textures(stfbi, src, dst, x, y, w, h);
336   if (dst == ST_ATTACHMENT_FRONT_LEFT)
337      xmesa_st_framebuffer_display(stfbi, dst);
338}
339