xm_st.c revision d34f6e9db15a1fa3a7e3b68e47ac4eef2706b8cd 
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   enum pipe_texture_target target;
42
43   unsigned texture_width, texture_height, texture_mask;
44   struct pipe_resource *textures[ST_ATTACHMENT_COUNT];
45
46   struct pipe_surface *display_surface;
47};
48
49static INLINE struct xmesa_st_framebuffer *
50xmesa_st_framebuffer(struct st_framebuffer_iface *stfbi)
51{
52   return (struct xmesa_st_framebuffer *) stfbi->st_manager_private;
53}
54
55/**
56 * Display an attachment to the xlib_drawable of the framebuffer.
57 */
58static boolean
59xmesa_st_framebuffer_display(struct st_framebuffer_iface *stfbi,
60                             enum st_attachment_type statt)
61{
62   struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
63   struct pipe_resource *ptex = xstfb->textures[statt];
64   struct pipe_surface *psurf;
65
66   if (!ptex)
67      return TRUE;
68
69   psurf = xstfb->display_surface;
70   /* (re)allocate the surface for the texture to be displayed */
71   if (!psurf || psurf->texture != ptex) {
72      pipe_surface_reference(&xstfb->display_surface, NULL);
73
74      psurf = xstfb->screen->get_tex_surface(xstfb->screen,
75            ptex, 0, 0, 0, PIPE_BIND_DISPLAY_TARGET);
76      if (!psurf)
77         return FALSE;
78
79      xstfb->display_surface = psurf;
80   }
81
82   xstfb->screen->flush_frontbuffer(xstfb->screen, psurf, &xstfb->buffer->ws);
83
84   return TRUE;
85}
86
87/**
88 * Copy the contents between the attachments.
89 */
90static void
91xmesa_st_framebuffer_copy_textures(struct st_framebuffer_iface *stfbi,
92                                   enum st_attachment_type src_statt,
93                                   enum st_attachment_type dst_statt,
94                                   unsigned x, unsigned y,
95                                   unsigned width, unsigned height)
96{
97   struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
98   struct pipe_resource *src_ptex = xstfb->textures[src_statt];
99   struct pipe_resource *dst_ptex = xstfb->textures[dst_statt];
100   struct pipe_subresource subsrc, subdst;
101   struct pipe_context *pipe;
102
103   if (!src_ptex || !dst_ptex)
104      return;
105
106   pipe = xstfb->display->pipe;
107   if (!pipe) {
108      pipe = xstfb->screen->context_create(xstfb->screen, NULL);
109      if (!pipe)
110         return;
111      xstfb->display->pipe = pipe;
112   }
113
114   subsrc.face = 0;
115   subsrc.level = 0;
116   subdst.face = 0;
117   subdst.level = 0;
118
119   if (src_ptex && dst_ptex)
120      pipe->resource_copy_region(pipe, dst_ptex, subdst, x, y, 0,
121                                 src_ptex, subsrc, x, y, 0, width, height);
122}
123
124/**
125 * Remove outdated textures and create the requested ones.
126 */
127static boolean
128xmesa_st_framebuffer_validate_textures(struct st_framebuffer_iface *stfbi,
129                                       unsigned width, unsigned height,
130                                       unsigned mask)
131{
132   struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
133   struct pipe_resource templ;
134   enum st_attachment_type i;
135
136   /* remove outdated textures */
137   if (xstfb->texture_width != width || xstfb->texture_height != height) {
138      for (i = 0; i < ST_ATTACHMENT_COUNT; i++)
139         pipe_resource_reference(&xstfb->textures[i], NULL);
140   }
141
142   memset(&templ, 0, sizeof(templ));
143   templ.target = xstfb->target;
144   templ.width0 = width;
145   templ.height0 = height;
146   templ.depth0 = 1;
147   templ.last_level = 0;
148
149   for (i = 0; i < ST_ATTACHMENT_COUNT; i++) {
150      enum pipe_format format;
151      unsigned bind;
152
153      /* the texture already exists or not requested */
154      if (xstfb->textures[i] || !(mask & (1 << i))) {
155         /* remember the texture */
156         if (xstfb->textures[i])
157            mask |= (1 << i);
158         continue;
159      }
160
161      switch (i) {
162      case ST_ATTACHMENT_FRONT_LEFT:
163      case ST_ATTACHMENT_BACK_LEFT:
164      case ST_ATTACHMENT_FRONT_RIGHT:
165      case ST_ATTACHMENT_BACK_RIGHT:
166         format = xstfb->stvis.color_format;
167         bind = PIPE_BIND_DISPLAY_TARGET |
168                     PIPE_BIND_RENDER_TARGET;
169         break;
170      case ST_ATTACHMENT_DEPTH_STENCIL:
171         format = xstfb->stvis.depth_stencil_format;
172         bind = PIPE_BIND_DEPTH_STENCIL;
173         break;
174      default:
175         format = PIPE_FORMAT_NONE;
176         break;
177      }
178
179      if (format != PIPE_FORMAT_NONE) {
180         templ.format = format;
181         templ.bind = bind;
182
183         xstfb->textures[i] =
184            xstfb->screen->resource_create(xstfb->screen, &templ);
185         if (!xstfb->textures[i])
186            return FALSE;
187      }
188   }
189
190   xstfb->texture_width = width;
191   xstfb->texture_height = height;
192   xstfb->texture_mask = mask;
193
194   return TRUE;
195}
196
197static boolean
198xmesa_st_framebuffer_validate(struct st_framebuffer_iface *stfbi,
199                              const enum st_attachment_type *statts,
200                              unsigned count,
201                              struct pipe_resource **out)
202{
203   struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
204   unsigned statt_mask, new_mask, i;
205   boolean resized;
206   boolean ret;
207
208   statt_mask = 0x0;
209   for (i = 0; i < count; i++)
210      statt_mask |= 1 << statts[i];
211   /* record newly allocated textures */
212   new_mask = statt_mask & ~xstfb->texture_mask;
213
214   resized = (xstfb->buffer->width != xstfb->texture_width ||
215              xstfb->buffer->height != xstfb->texture_height);
216
217   /* revalidate textures */
218   if (resized || new_mask) {
219      ret = xmesa_st_framebuffer_validate_textures(stfbi,
220                  xstfb->buffer->width, xstfb->buffer->height, statt_mask);
221      if (!ret)
222         return ret;
223
224      if (!resized) {
225         enum st_attachment_type back, front;
226
227         back = ST_ATTACHMENT_BACK_LEFT;
228         front = ST_ATTACHMENT_FRONT_LEFT;
229         /* copy the contents if front is newly allocated and back is not */
230         if ((statt_mask & (1 << back)) &&
231             (new_mask & (1 << front)) &&
232             !(new_mask & (1 << back))) {
233            xmesa_st_framebuffer_copy_textures(stfbi, back, front,
234                  0, 0, xstfb->texture_width, xstfb->texture_height);
235         }
236      }
237   }
238
239   for (i = 0; i < count; i++) {
240      out[i] = NULL;
241      pipe_resource_reference(&out[i], xstfb->textures[statts[i]]);
242   }
243
244   return TRUE;
245}
246
247static boolean
248xmesa_st_framebuffer_flush_front(struct st_framebuffer_iface *stfbi,
249                                 enum st_attachment_type statt)
250{
251   struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
252   boolean ret;
253
254   ret = xmesa_st_framebuffer_display(stfbi, statt);
255   if (ret)
256      xmesa_check_buffer_size(xstfb->buffer);
257
258   return ret;
259}
260
261struct st_framebuffer_iface *
262xmesa_create_st_framebuffer(XMesaDisplay xmdpy, XMesaBuffer b)
263{
264   struct st_framebuffer_iface *stfbi;
265   struct xmesa_st_framebuffer *xstfb;
266
267   assert(xmdpy->display == b->xm_visual->display);
268
269   stfbi = CALLOC_STRUCT(st_framebuffer_iface);
270   xstfb = CALLOC_STRUCT(xmesa_st_framebuffer);
271   if (!stfbi || !xstfb) {
272      if (stfbi)
273         FREE(stfbi);
274      if (xstfb)
275         FREE(xstfb);
276      return NULL;
277   }
278
279   xstfb->display = xmdpy;
280   xstfb->buffer = b;
281   xstfb->screen = xmdpy->screen;
282   xstfb->stvis = b->xm_visual->stvis;
283   if(xstfb->screen->get_param(xstfb->screen, PIPE_CAP_NPOT_TEXTURES))
284      xstfb->target = PIPE_TEXTURE_2D;
285   else
286      xstfb->target = PIPE_TEXTURE_RECT;
287
288   stfbi->visual = &xstfb->stvis;
289   stfbi->flush_front = xmesa_st_framebuffer_flush_front;
290   stfbi->validate = xmesa_st_framebuffer_validate;
291   stfbi->st_manager_private = (void *) xstfb;
292
293   return stfbi;
294}
295
296void
297xmesa_destroy_st_framebuffer(struct st_framebuffer_iface *stfbi)
298{
299   struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
300   int i;
301
302   pipe_surface_reference(&xstfb->display_surface, NULL);
303
304   for (i = 0; i < ST_ATTACHMENT_COUNT; i++)
305      pipe_resource_reference(&xstfb->textures[i], NULL);
306
307   FREE(xstfb);
308   FREE(stfbi);
309}
310
311void
312xmesa_swap_st_framebuffer(struct st_framebuffer_iface *stfbi)
313{
314   struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
315   boolean ret;
316
317   ret = xmesa_st_framebuffer_display(stfbi, ST_ATTACHMENT_BACK_LEFT);
318   if (ret) {
319      struct pipe_resource **front, **back, *tmp;
320
321      front = &xstfb->textures[ST_ATTACHMENT_FRONT_LEFT];
322      back = &xstfb->textures[ST_ATTACHMENT_BACK_LEFT];
323      /* swap textures only if the front texture has been allocated */
324      if (*front) {
325         tmp = *front;
326         *front = *back;
327         *back = tmp;
328      }
329
330      xmesa_check_buffer_size(xstfb->buffer);
331   }
332}
333
334void
335xmesa_copy_st_framebuffer(struct st_framebuffer_iface *stfbi,
336                          enum st_attachment_type src,
337                          enum st_attachment_type dst,
338                          int x, int y, int w, int h)
339{
340   xmesa_st_framebuffer_copy_textures(stfbi, src, dst, x, y, w, h);
341   if (dst == ST_ATTACHMENT_FRONT_LEFT)
342      xmesa_st_framebuffer_display(stfbi, dst);
343}
344