sp_screen.c revision 3464ebd5 
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#ifdef HAVE_LLVM
68      /* Softpipe doesn't yet know how to tell draw/llvm about textures */
69      return 0;
70#else
71      return PIPE_MAX_VERTEX_SAMPLERS;
72#endif
73   case PIPE_CAP_MAX_COMBINED_SAMPLERS:
74      return PIPE_MAX_SAMPLERS + PIPE_MAX_VERTEX_SAMPLERS;
75   case PIPE_CAP_NPOT_TEXTURES:
76      return 1;
77   case PIPE_CAP_TWO_SIDED_STENCIL:
78      return 1;
79   case PIPE_CAP_GLSL:
80      return 1;
81   case PIPE_CAP_SM3:
82      return 1;
83   case PIPE_CAP_ANISOTROPIC_FILTER:
84      return 1;
85   case PIPE_CAP_POINT_SPRITE:
86      return 1;
87   case PIPE_CAP_MAX_RENDER_TARGETS:
88      return PIPE_MAX_COLOR_BUFS;
89   case PIPE_CAP_OCCLUSION_QUERY:
90      return 1;
91   case PIPE_CAP_TIMER_QUERY:
92      return 1;
93   case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
94      return 1;
95   case PIPE_CAP_TEXTURE_MIRROR_REPEAT:
96      return 1;
97   case PIPE_CAP_TEXTURE_SHADOW_MAP:
98      return 1;
99   case PIPE_CAP_TEXTURE_SWIZZLE:
100      return 1;
101   case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
102      return SP_MAX_TEXTURE_2D_LEVELS;
103   case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
104      return SP_MAX_TEXTURE_3D_LEVELS;
105   case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
106      return SP_MAX_TEXTURE_2D_LEVELS;
107   case PIPE_CAP_BLEND_EQUATION_SEPARATE:
108      return 1;
109   case PIPE_CAP_INDEP_BLEND_ENABLE:
110      return 1;
111   case PIPE_CAP_INDEP_BLEND_FUNC:
112      return 1;
113   case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
114   case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
115   case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
116   case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
117      return 1;
118   case PIPE_CAP_STREAM_OUTPUT:
119      return 1;
120   case PIPE_CAP_PRIMITIVE_RESTART:
121      return 1;
122   case PIPE_CAP_DEPTHSTENCIL_CLEAR_SEPARATE:
123      return 0;
124   case PIPE_CAP_SHADER_STENCIL_EXPORT:
125      return 1;
126   case PIPE_CAP_TGSI_INSTANCEID:
127   case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
128      return 1;
129   case PIPE_CAP_ARRAY_TEXTURES:
130      return 1;
131   default:
132      return 0;
133   }
134}
135
136static int
137softpipe_get_shader_param(struct pipe_screen *screen, unsigned shader, enum pipe_shader_cap param)
138{
139   switch(shader)
140   {
141   case PIPE_SHADER_FRAGMENT:
142      return tgsi_exec_get_shader_param(param);
143   case PIPE_SHADER_VERTEX:
144   case PIPE_SHADER_GEOMETRY:
145      return draw_get_shader_param(shader, param);
146   default:
147      return 0;
148   }
149}
150
151static float
152softpipe_get_paramf(struct pipe_screen *screen, enum pipe_cap param)
153{
154   switch (param) {
155   case PIPE_CAP_MAX_LINE_WIDTH:
156      /* fall-through */
157   case PIPE_CAP_MAX_LINE_WIDTH_AA:
158      return 255.0; /* arbitrary */
159   case PIPE_CAP_MAX_POINT_WIDTH:
160      /* fall-through */
161   case PIPE_CAP_MAX_POINT_WIDTH_AA:
162      return 255.0; /* arbitrary */
163   case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
164      return 16.0;
165   case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
166      return 16.0; /* arbitrary */
167   default:
168      return 0;
169   }
170}
171
172
173/**
174 * Query format support for creating a texture, drawing surface, etc.
175 * \param format  the format to test
176 * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
177 */
178static boolean
179softpipe_is_format_supported( struct pipe_screen *screen,
180                              enum pipe_format format,
181                              enum pipe_texture_target target,
182                              unsigned sample_count,
183                              unsigned bind)
184{
185   struct sw_winsys *winsys = softpipe_screen(screen)->winsys;
186   const struct util_format_description *format_desc;
187
188   assert(target == PIPE_BUFFER ||
189          target == PIPE_TEXTURE_1D ||
190          target == PIPE_TEXTURE_1D_ARRAY ||
191          target == PIPE_TEXTURE_2D ||
192          target == PIPE_TEXTURE_2D_ARRAY ||
193          target == PIPE_TEXTURE_RECT ||
194          target == PIPE_TEXTURE_3D ||
195          target == PIPE_TEXTURE_CUBE);
196
197   format_desc = util_format_description(format);
198   if (!format_desc)
199      return FALSE;
200
201   if (sample_count > 1)
202      return FALSE;
203
204   if (bind & (PIPE_BIND_DISPLAY_TARGET |
205               PIPE_BIND_SCANOUT |
206               PIPE_BIND_SHARED)) {
207      if(!winsys->is_displaytarget_format_supported(winsys, bind, format))
208         return FALSE;
209   }
210
211   if (bind & PIPE_BIND_RENDER_TARGET) {
212      if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS)
213         return FALSE;
214
215      /*
216       * Although possible, it is unnatural to render into compressed or YUV
217       * surfaces. So disable these here to avoid going into weird paths
218       * inside the state trackers.
219       */
220      if (format_desc->block.width != 1 ||
221          format_desc->block.height != 1)
222         return FALSE;
223   }
224
225   if (bind & PIPE_BIND_DEPTH_STENCIL) {
226      if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
227         return FALSE;
228
229      /*
230       * TODO: Unfortunately we cannot render into anything more than 32 bits
231       * because we encode depth and stencil clear values into a 32bit word.
232       */
233      if (format_desc->block.bits > 32)
234         return FALSE;
235
236      /*
237       * TODO: eliminate this restriction
238       */
239      if (format == PIPE_FORMAT_Z32_FLOAT)
240         return FALSE;
241   }
242
243   /*
244    * All other operations (sampling, transfer, etc).
245    */
246
247   if (format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
248      return util_format_s3tc_enabled;
249   }
250
251   /*
252    * Everything else should be supported by u_format.
253    */
254   return TRUE;
255}
256
257
258static void
259softpipe_destroy_screen( struct pipe_screen *screen )
260{
261   struct softpipe_screen *sp_screen = softpipe_screen(screen);
262   struct sw_winsys *winsys = sp_screen->winsys;
263
264   if(winsys->destroy)
265      winsys->destroy(winsys);
266
267   FREE(screen);
268}
269
270
271/* This is often overriden by the co-state tracker.
272 */
273static void
274softpipe_flush_frontbuffer(struct pipe_screen *_screen,
275                           struct pipe_resource *resource,
276                           unsigned level, unsigned layer,
277                           void *context_private)
278{
279   struct softpipe_screen *screen = softpipe_screen(_screen);
280   struct sw_winsys *winsys = screen->winsys;
281   struct softpipe_resource *texture = softpipe_resource(resource);
282
283   assert(texture->dt);
284   if (texture->dt)
285      winsys->displaytarget_display(winsys, texture->dt, context_private);
286}
287
288/**
289 * Create a new pipe_screen object
290 * Note: we're not presently subclassing pipe_screen (no softpipe_screen).
291 */
292struct pipe_screen *
293softpipe_create_screen(struct sw_winsys *winsys)
294{
295   struct softpipe_screen *screen = CALLOC_STRUCT(softpipe_screen);
296
297   if (!screen)
298      return NULL;
299
300   screen->winsys = winsys;
301
302   screen->base.winsys = NULL;
303   screen->base.destroy = softpipe_destroy_screen;
304
305   screen->base.get_name = softpipe_get_name;
306   screen->base.get_vendor = softpipe_get_vendor;
307   screen->base.get_param = softpipe_get_param;
308   screen->base.get_shader_param = softpipe_get_shader_param;
309   screen->base.get_paramf = softpipe_get_paramf;
310   screen->base.is_format_supported = softpipe_is_format_supported;
311   screen->base.context_create = softpipe_create_context;
312   screen->base.flush_frontbuffer = softpipe_flush_frontbuffer;
313
314   util_format_s3tc_init();
315
316   softpipe_init_screen_texture_funcs(&screen->base);
317   softpipe_init_screen_fence_funcs(&screen->base);
318
319   return &screen->base;
320}
321