sp_screen.c revision 27d3bab05538a6b4cb41dac8334136f824b0e673 
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#include "draw/draw_context.h"
35
36#include "state_tracker/sw_winsys.h"
37#include "tgsi/tgsi_exec.h"
38
39#include "sp_texture.h"
40#include "sp_screen.h"
41#include "sp_context.h"
42#include "sp_fence.h"
43#include "sp_public.h"
44
45
46static const char *
47softpipe_get_vendor(struct pipe_screen *screen)
48{
49   return "VMware, Inc.";
50}
51
52
53static const char *
54softpipe_get_name(struct pipe_screen *screen)
55{
56   return "softpipe";
57}
58
59
60static int
61softpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
62{
63   switch (param) {
64   case PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS:
65      return PIPE_MAX_SAMPLERS;
66   case PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS:
67      return PIPE_MAX_VERTEX_SAMPLERS;
68   case PIPE_CAP_MAX_COMBINED_SAMPLERS:
69      return PIPE_MAX_SAMPLERS + PIPE_MAX_VERTEX_SAMPLERS;
70   case PIPE_CAP_NPOT_TEXTURES:
71      return 1;
72   case PIPE_CAP_TWO_SIDED_STENCIL:
73      return 1;
74   case PIPE_CAP_GLSL:
75      return 1;
76   case PIPE_CAP_SM3:
77      return 1;
78   case PIPE_CAP_ANISOTROPIC_FILTER:
79      return 0;
80   case PIPE_CAP_POINT_SPRITE:
81      return 1;
82   case PIPE_CAP_MAX_RENDER_TARGETS:
83      return PIPE_MAX_COLOR_BUFS;
84   case PIPE_CAP_OCCLUSION_QUERY:
85      return 1;
86   case PIPE_CAP_TIMER_QUERY:
87      return 1;
88   case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
89      return 1;
90   case PIPE_CAP_TEXTURE_MIRROR_REPEAT:
91      return 1;
92   case PIPE_CAP_TEXTURE_SHADOW_MAP:
93      return 1;
94   case PIPE_CAP_TEXTURE_SWIZZLE:
95      return 1;
96   case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
97      return SP_MAX_TEXTURE_2D_LEVELS;
98   case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
99      return SP_MAX_TEXTURE_3D_LEVELS;
100   case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
101      return SP_MAX_TEXTURE_2D_LEVELS;
102   case PIPE_CAP_BLEND_EQUATION_SEPARATE:
103      return 1;
104   case PIPE_CAP_INDEP_BLEND_ENABLE:
105      return 1;
106   case PIPE_CAP_INDEP_BLEND_FUNC:
107      return 1;
108   case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
109   case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
110   case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
111   case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
112      return 1;
113   case PIPE_CAP_STREAM_OUTPUT:
114      return 1;
115   case PIPE_CAP_PRIMITIVE_RESTART:
116      return 1;
117   case PIPE_CAP_DEPTHSTENCIL_CLEAR_SEPARATE:
118      return 0;
119   case PIPE_CAP_SHADER_STENCIL_EXPORT:
120      return 1;
121   default:
122      return 0;
123   }
124}
125
126static int
127softpipe_get_shader_param(struct pipe_screen *screen, unsigned shader, enum pipe_shader_cap param)
128{
129   switch(shader)
130   {
131   case PIPE_SHADER_FRAGMENT:
132      return tgsi_exec_get_shader_param(param);
133   case PIPE_SHADER_VERTEX:
134   case PIPE_SHADER_GEOMETRY:
135      return draw_get_shader_param(shader, param);
136   default:
137      return 0;
138   }
139}
140
141static float
142softpipe_get_paramf(struct pipe_screen *screen, enum pipe_cap param)
143{
144   switch (param) {
145   case PIPE_CAP_MAX_LINE_WIDTH:
146      /* fall-through */
147   case PIPE_CAP_MAX_LINE_WIDTH_AA:
148      return 255.0; /* arbitrary */
149   case PIPE_CAP_MAX_POINT_WIDTH:
150      /* fall-through */
151   case PIPE_CAP_MAX_POINT_WIDTH_AA:
152      return 255.0; /* arbitrary */
153   case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
154      return 16.0; /* not actually signficant at this time */
155   case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
156      return 16.0; /* arbitrary */
157   default:
158      return 0;
159   }
160}
161
162
163/**
164 * Query format support for creating a texture, drawing surface, etc.
165 * \param format  the format to test
166 * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
167 */
168static boolean
169softpipe_is_format_supported( struct pipe_screen *screen,
170                              enum pipe_format format,
171                              enum pipe_texture_target target,
172                              unsigned sample_count,
173                              unsigned bind,
174                              unsigned geom_flags )
175{
176   struct sw_winsys *winsys = softpipe_screen(screen)->winsys;
177   const struct util_format_description *format_desc;
178
179   assert(target == PIPE_BUFFER ||
180          target == PIPE_TEXTURE_1D ||
181          target == PIPE_TEXTURE_2D ||
182          target == PIPE_TEXTURE_RECT ||
183          target == PIPE_TEXTURE_3D ||
184          target == PIPE_TEXTURE_CUBE);
185
186   format_desc = util_format_description(format);
187   if (!format_desc)
188      return FALSE;
189
190   if (sample_count > 1)
191      return FALSE;
192
193   if (bind & (PIPE_BIND_DISPLAY_TARGET |
194               PIPE_BIND_SCANOUT |
195               PIPE_BIND_SHARED)) {
196      if(!winsys->is_displaytarget_format_supported(winsys, bind, format))
197         return FALSE;
198   }
199
200   if (bind & PIPE_BIND_RENDER_TARGET) {
201      if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS)
202         return FALSE;
203
204      /*
205       * Although possible, it is unnatural to render into compressed or YUV
206       * surfaces. So disable these here to avoid going into weird paths
207       * inside the state trackers.
208       */
209      if (format_desc->block.width != 1 ||
210          format_desc->block.height != 1)
211         return FALSE;
212
213      /*
214       * TODO: Unfortunately we cannot render into anything more than 32 bits
215       * because we encode color clear values into a 32bit word.
216       */
217      if (format_desc->block.bits > 32)
218         return FALSE;
219   }
220
221   if (bind & PIPE_BIND_DEPTH_STENCIL) {
222      if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
223         return FALSE;
224
225      /*
226       * TODO: Unfortunately we cannot render into anything more than 32 bits
227       * because we encode depth and stencil clear values into a 32bit word.
228       */
229      if (format_desc->block.bits > 32)
230         return FALSE;
231
232      /*
233       * TODO: eliminate this restriction
234       */
235      if (format == PIPE_FORMAT_Z32_FLOAT)
236         return FALSE;
237   }
238
239   /*
240    * All other operations (sampling, transfer, etc).
241    */
242
243   if (format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
244      return util_format_s3tc_enabled;
245   }
246
247   /*
248    * Everything else should be supported by u_format.
249    */
250   return TRUE;
251}
252
253
254static void
255softpipe_destroy_screen( struct pipe_screen *screen )
256{
257   struct softpipe_screen *sp_screen = softpipe_screen(screen);
258   struct sw_winsys *winsys = sp_screen->winsys;
259
260   if(winsys->destroy)
261      winsys->destroy(winsys);
262
263   FREE(screen);
264}
265
266
267/* This is often overriden by the co-state tracker.
268 */
269static void
270softpipe_flush_frontbuffer(struct pipe_screen *_screen,
271                           struct pipe_surface *surface,
272                           void *context_private)
273{
274   struct softpipe_screen *screen = softpipe_screen(_screen);
275   struct sw_winsys *winsys = screen->winsys;
276   struct softpipe_resource *texture = softpipe_resource(surface->texture);
277
278   assert(texture->dt);
279   if (texture->dt)
280      winsys->displaytarget_display(winsys, texture->dt, context_private);
281}
282
283/**
284 * Create a new pipe_screen object
285 * Note: we're not presently subclassing pipe_screen (no softpipe_screen).
286 */
287struct pipe_screen *
288softpipe_create_screen(struct sw_winsys *winsys)
289{
290   struct softpipe_screen *screen = CALLOC_STRUCT(softpipe_screen);
291
292   if (!screen)
293      return NULL;
294
295   screen->winsys = winsys;
296
297   screen->base.winsys = NULL;
298   screen->base.destroy = softpipe_destroy_screen;
299
300   screen->base.get_name = softpipe_get_name;
301   screen->base.get_vendor = softpipe_get_vendor;
302   screen->base.get_param = softpipe_get_param;
303   screen->base.get_shader_param = softpipe_get_shader_param;
304   screen->base.get_paramf = softpipe_get_paramf;
305   screen->base.is_format_supported = softpipe_is_format_supported;
306   screen->base.context_create = softpipe_create_context;
307   screen->base.flush_frontbuffer = softpipe_flush_frontbuffer;
308
309   util_format_s3tc_init();
310
311   softpipe_init_screen_texture_funcs(&screen->base);
312   softpipe_init_screen_fence_funcs(&screen->base);
313
314   return &screen->base;
315}
316