sp_screen.c revision f57edc58b52605ed3c98f8af91412e3302bbf444 
1/**************************************************************************
2 *
3 * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28
29#include "util/u_memory.h"
30#include "util/u_format.h"
31#include "util/u_format_s3tc.h"
32#include "pipe/p_defines.h"
33#include "pipe/p_screen.h"
34
35#include "state_tracker/sw_winsys.h"
36#include "tgsi/tgsi_exec.h"
37
38#include "sp_texture.h"
39#include "sp_screen.h"
40#include "sp_context.h"
41#include "sp_fence.h"
42#include "sp_public.h"
43
44
45static const char *
46softpipe_get_vendor(struct pipe_screen *screen)
47{
48   return "VMware, Inc.";
49}
50
51
52static const char *
53softpipe_get_name(struct pipe_screen *screen)
54{
55   return "softpipe";
56}
57
58
59static int
60softpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
61{
62   switch (param) {
63   case PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS:
64      return PIPE_MAX_SAMPLERS;
65   case PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS:
66      return PIPE_MAX_VERTEX_SAMPLERS;
67   case PIPE_CAP_MAX_COMBINED_SAMPLERS:
68      return PIPE_MAX_SAMPLERS + PIPE_MAX_VERTEX_SAMPLERS;
69   case PIPE_CAP_NPOT_TEXTURES:
70      return 1;
71   case PIPE_CAP_TWO_SIDED_STENCIL:
72      return 1;
73   case PIPE_CAP_GLSL:
74      return 1;
75   case PIPE_CAP_SM3:
76      return 1;
77   case PIPE_CAP_ANISOTROPIC_FILTER:
78      return 0;
79   case PIPE_CAP_POINT_SPRITE:
80      return 1;
81   case PIPE_CAP_MAX_RENDER_TARGETS:
82      return PIPE_MAX_COLOR_BUFS;
83   case PIPE_CAP_OCCLUSION_QUERY:
84      return 1;
85   case PIPE_CAP_TIMER_QUERY:
86      return 1;
87   case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
88      return 1;
89   case PIPE_CAP_TEXTURE_MIRROR_REPEAT:
90      return 1;
91   case PIPE_CAP_TEXTURE_SHADOW_MAP:
92      return 1;
93   case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
94      return SP_MAX_TEXTURE_2D_LEVELS;
95   case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
96      return SP_MAX_TEXTURE_3D_LEVELS;
97   case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
98      return SP_MAX_TEXTURE_2D_LEVELS;
99   case PIPE_CAP_TGSI_CONT_SUPPORTED:
100      return 1;
101   case PIPE_CAP_BLEND_EQUATION_SEPARATE:
102      return 1;
103   case PIPE_CAP_MAX_CONST_BUFFERS:
104      return PIPE_MAX_CONSTANT_BUFFERS;
105   case PIPE_CAP_MAX_CONST_BUFFER_SIZE:
106      return 4096 * 4 * sizeof(float);
107   case PIPE_CAP_INDEP_BLEND_ENABLE:
108      return 1;
109   case PIPE_CAP_INDEP_BLEND_FUNC:
110      return 1;
111   case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
112   case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
113   case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
114   case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
115      return 1;
116
117   case PIPE_CAP_MAX_VS_INSTRUCTIONS:
118   case PIPE_CAP_MAX_FS_INSTRUCTIONS:
119   case PIPE_CAP_MAX_VS_ALU_INSTRUCTIONS:
120   case PIPE_CAP_MAX_FS_ALU_INSTRUCTIONS:
121   case PIPE_CAP_MAX_VS_TEX_INSTRUCTIONS:
122   case PIPE_CAP_MAX_FS_TEX_INSTRUCTIONS:
123   case PIPE_CAP_MAX_VS_TEX_INDIRECTIONS:
124   case PIPE_CAP_MAX_FS_TEX_INDIRECTIONS:
125      /* There is no limit in number of instructions beyond available memory */
126      return 32768;
127   case PIPE_CAP_MAX_VS_CONTROL_FLOW_DEPTH:
128   case PIPE_CAP_MAX_FS_CONTROL_FLOW_DEPTH:
129      return TGSI_EXEC_MAX_NESTING;
130   case PIPE_CAP_MAX_VS_INPUTS:
131   case PIPE_CAP_MAX_FS_INPUTS:
132      return TGSI_EXEC_MAX_INPUT_ATTRIBS;
133   case PIPE_CAP_MAX_FS_CONSTS:
134   case PIPE_CAP_MAX_VS_CONSTS:
135      return TGSI_EXEC_MAX_CONST_BUFFER;
136   case PIPE_CAP_MAX_VS_TEMPS:
137   case PIPE_CAP_MAX_FS_TEMPS:
138      return TGSI_EXEC_NUM_TEMPS;
139   case PIPE_CAP_MAX_VS_ADDRS:
140   case PIPE_CAP_MAX_FS_ADDRS:
141      return TGSI_EXEC_NUM_ADDRS;
142   case PIPE_CAP_MAX_VS_PREDS:
143   case PIPE_CAP_MAX_FS_PREDS:
144      return TGSI_EXEC_NUM_PREDS;
145
146   default:
147      return 0;
148   }
149}
150
151
152static float
153softpipe_get_paramf(struct pipe_screen *screen, enum pipe_cap param)
154{
155   switch (param) {
156   case PIPE_CAP_MAX_LINE_WIDTH:
157      /* fall-through */
158   case PIPE_CAP_MAX_LINE_WIDTH_AA:
159      return 255.0; /* arbitrary */
160   case PIPE_CAP_MAX_POINT_WIDTH:
161      /* fall-through */
162   case PIPE_CAP_MAX_POINT_WIDTH_AA:
163      return 255.0; /* arbitrary */
164   case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
165      return 16.0; /* not actually signficant at this time */
166   case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
167      return 16.0; /* arbitrary */
168   default:
169      return 0;
170   }
171}
172
173
174/**
175 * Query format support for creating a texture, drawing surface, etc.
176 * \param format  the format to test
177 * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
178 */
179static boolean
180softpipe_is_format_supported( struct pipe_screen *screen,
181                              enum pipe_format format,
182                              enum pipe_texture_target target,
183                              unsigned sample_count,
184                              unsigned bind,
185                              unsigned geom_flags )
186{
187   struct sw_winsys *winsys = softpipe_screen(screen)->winsys;
188   const struct util_format_description *format_desc;
189
190   assert(target == PIPE_BUFFER ||
191          target == PIPE_TEXTURE_1D ||
192          target == PIPE_TEXTURE_2D ||
193          target == PIPE_TEXTURE_3D ||
194          target == PIPE_TEXTURE_CUBE);
195
196   format_desc = util_format_description(format);
197   if (!format_desc)
198      return FALSE;
199
200   if (sample_count > 1)
201      return FALSE;
202
203   if (bind & (PIPE_BIND_DISPLAY_TARGET |
204               PIPE_BIND_SCANOUT |
205               PIPE_BIND_SHARED)) {
206      if(!winsys->is_displaytarget_format_supported(winsys, bind, format))
207         return FALSE;
208   }
209
210   if (bind & PIPE_BIND_RENDER_TARGET) {
211      if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS)
212         return FALSE;
213
214      /*
215       * Although possible, it is unnatural to render into compressed or YUV
216       * surfaces. So disable these here to avoid going into weird paths
217       * inside the state trackers.
218       */
219      if (format_desc->block.width != 1 ||
220          format_desc->block.height != 1)
221         return FALSE;
222
223      /*
224       * TODO: Unfortunately we cannot render into anything more than 32 bits
225       * because we encode color clear values into a 32bit word.
226       */
227      if (format_desc->block.bits > 32)
228         return FALSE;
229   }
230
231   if (bind & PIPE_BIND_DEPTH_STENCIL) {
232      if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
233         return FALSE;
234
235      /*
236       * TODO: Unfortunately we cannot render into anything more than 32 bits
237       * because we encode depth and stencil clear values into a 32bit word.
238       */
239      if (format_desc->block.bits > 32)
240         return FALSE;
241
242      /*
243       * TODO: eliminate this restriction
244       */
245      if (format == PIPE_FORMAT_Z32_FLOAT)
246         return FALSE;
247   }
248
249   /*
250    * All other operations (sampling, transfer, etc).
251    */
252
253   if (format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
254      return util_format_s3tc_enabled;
255   }
256
257   /*
258    * Everything else should be supported by u_format.
259    */
260   return TRUE;
261}
262
263
264static void
265softpipe_destroy_screen( struct pipe_screen *screen )
266{
267   struct softpipe_screen *sp_screen = softpipe_screen(screen);
268   struct sw_winsys *winsys = sp_screen->winsys;
269
270   if(winsys->destroy)
271      winsys->destroy(winsys);
272
273   FREE(screen);
274}
275
276
277/* This is often overriden by the co-state tracker.
278 */
279static void
280softpipe_flush_frontbuffer(struct pipe_screen *_screen,
281                           struct pipe_surface *surface,
282                           void *context_private)
283{
284   struct softpipe_screen *screen = softpipe_screen(_screen);
285   struct sw_winsys *winsys = screen->winsys;
286   struct softpipe_resource *texture = softpipe_resource(surface->texture);
287
288   assert(texture->dt);
289   if (texture->dt)
290      winsys->displaytarget_display(winsys, texture->dt, context_private);
291}
292
293/**
294 * Create a new pipe_screen object
295 * Note: we're not presently subclassing pipe_screen (no softpipe_screen).
296 */
297struct pipe_screen *
298softpipe_create_screen(struct sw_winsys *winsys)
299{
300   struct softpipe_screen *screen = CALLOC_STRUCT(softpipe_screen);
301
302   if (!screen)
303      return NULL;
304
305   screen->winsys = winsys;
306
307   screen->base.winsys = NULL;
308   screen->base.destroy = softpipe_destroy_screen;
309
310   screen->base.get_name = softpipe_get_name;
311   screen->base.get_vendor = softpipe_get_vendor;
312   screen->base.get_param = softpipe_get_param;
313   screen->base.get_paramf = softpipe_get_paramf;
314   screen->base.is_format_supported = softpipe_is_format_supported;
315   screen->base.context_create = softpipe_create_context;
316   screen->base.flush_frontbuffer = softpipe_flush_frontbuffer;
317
318   util_format_s3tc_init();
319
320   softpipe_init_screen_texture_funcs(&screen->base);
321   softpipe_init_screen_fence_funcs(&screen->base);
322
323   return &screen->base;
324}
325