sp_screen.c revision 9d9afcb5bac2931d4b8e6d1aa571e941c5110c90 
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 "util/u_video.h"
33#include "pipe/p_defines.h"
34#include "pipe/p_screen.h"
35#include "draw/draw_context.h"
36#include "vl/vl_decoder.h"
37#include "vl/vl_video_buffer.h"
38
39#include "state_tracker/sw_winsys.h"
40#include "tgsi/tgsi_exec.h"
41
42#include "sp_texture.h"
43#include "sp_screen.h"
44#include "sp_context.h"
45#include "sp_fence.h"
46#include "sp_public.h"
47
48DEBUG_GET_ONCE_BOOL_OPTION(use_llvm, "SOFTPIPE_USE_LLVM", FALSE)
49
50static const char *
51softpipe_get_vendor(struct pipe_screen *screen)
52{
53   return "VMware, Inc.";
54}
55
56
57static const char *
58softpipe_get_name(struct pipe_screen *screen)
59{
60   return "softpipe";
61}
62
63
64static int
65softpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
66{
67   switch (param) {
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_SM3:
75      return 1;
76   case PIPE_CAP_ANISOTROPIC_FILTER:
77      return 1;
78   case PIPE_CAP_POINT_SPRITE:
79      return 1;
80   case PIPE_CAP_MAX_RENDER_TARGETS:
81      return PIPE_MAX_COLOR_BUFS;
82   case PIPE_CAP_OCCLUSION_QUERY:
83      return 1;
84   case PIPE_CAP_TIMER_QUERY:
85      return 1;
86   case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
87      return 1;
88   case PIPE_CAP_TEXTURE_SHADOW_MAP:
89      return 1;
90   case PIPE_CAP_TEXTURE_SWIZZLE:
91      return 1;
92   case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
93      return SP_MAX_TEXTURE_2D_LEVELS;
94   case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
95      return SP_MAX_TEXTURE_3D_LEVELS;
96   case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
97      return SP_MAX_TEXTURE_2D_LEVELS;
98   case PIPE_CAP_BLEND_EQUATION_SEPARATE:
99      return 1;
100   case PIPE_CAP_INDEP_BLEND_ENABLE:
101      return 1;
102   case PIPE_CAP_INDEP_BLEND_FUNC:
103      return 1;
104   case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
105   case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
106   case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
107   case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
108      return 1;
109   case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
110      return PIPE_MAX_SO_BUFFERS;
111   case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS:
112   case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:
113      return 16*4;
114   case PIPE_CAP_PRIMITIVE_RESTART:
115      return 1;
116   case PIPE_CAP_DEPTHSTENCIL_CLEAR_SEPARATE:
117      return 0;
118   case PIPE_CAP_SHADER_STENCIL_EXPORT:
119      return 1;
120   case PIPE_CAP_TGSI_INSTANCEID:
121   case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
122      return 1;
123   case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
124      return 256; /* for GL3 */
125   case PIPE_CAP_MIN_TEXEL_OFFSET:
126      return -8;
127   case PIPE_CAP_MAX_TEXEL_OFFSET:
128      return 7;
129   case PIPE_CAP_CONDITIONAL_RENDER:
130      return 1;
131   case PIPE_CAP_FRAGMENT_COLOR_CLAMP_CONTROL:
132      return 1;
133   default:
134      return 0;
135   }
136}
137
138static int
139softpipe_get_shader_param(struct pipe_screen *screen, unsigned shader, enum pipe_shader_cap param)
140{
141   struct softpipe_screen *sp_screen = softpipe_screen(screen);
142   switch(shader)
143   {
144   case PIPE_SHADER_FRAGMENT:
145      return tgsi_exec_get_shader_param(param);
146   case PIPE_SHADER_VERTEX:
147   case PIPE_SHADER_GEOMETRY:
148      switch (param) {
149      case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
150#ifdef HAVE_LLVM
151         if (sp_screen->use_llvm)
152            /* Softpipe doesn't yet know how to tell draw/llvm about textures */
153            return 0;
154#endif
155         return PIPE_MAX_VERTEX_SAMPLERS;
156      case PIPE_SHADER_CAP_INTEGERS:
157#ifdef HAVE_LLVM /* gallivm doesn't support integers yet */
158         if (sp_screen->use_llvm)
159            return 0;
160#endif
161         /* fallthrough */
162      default:
163         return draw_get_shader_param(shader, param);
164      }
165   default:
166      return 0;
167   }
168}
169
170static float
171softpipe_get_paramf(struct pipe_screen *screen, enum pipe_capf param)
172{
173   switch (param) {
174   case PIPE_CAPF_MAX_LINE_WIDTH:
175      /* fall-through */
176   case PIPE_CAPF_MAX_LINE_WIDTH_AA:
177      return 255.0; /* arbitrary */
178   case PIPE_CAPF_MAX_POINT_WIDTH:
179      /* fall-through */
180   case PIPE_CAPF_MAX_POINT_WIDTH_AA:
181      return 255.0; /* arbitrary */
182   case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
183      return 16.0;
184   case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
185      return 16.0; /* arbitrary */
186   default:
187      return 0;
188   }
189}
190
191static int
192softpipe_get_video_param(struct pipe_screen *screen,
193                         enum pipe_video_profile profile,
194                         enum pipe_video_cap param)
195{
196   switch (param) {
197   case PIPE_VIDEO_CAP_SUPPORTED:
198       return vl_profile_supported(screen, profile);
199   case PIPE_VIDEO_CAP_NPOT_TEXTURES:
200      return 0;
201   case PIPE_VIDEO_CAP_MAX_WIDTH:
202   case PIPE_VIDEO_CAP_MAX_HEIGHT:
203      return vl_video_buffer_max_size(screen);
204   case PIPE_VIDEO_CAP_PREFERED_FORMAT:
205      return PIPE_FORMAT_NV12;
206   default:
207      return 0;
208   }
209}
210
211/**
212 * Query format support for creating a texture, drawing surface, etc.
213 * \param format  the format to test
214 * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
215 */
216static boolean
217softpipe_is_format_supported( struct pipe_screen *screen,
218                              enum pipe_format format,
219                              enum pipe_texture_target target,
220                              unsigned sample_count,
221                              unsigned bind)
222{
223   struct sw_winsys *winsys = softpipe_screen(screen)->winsys;
224   const struct util_format_description *format_desc;
225
226   assert(target == PIPE_BUFFER ||
227          target == PIPE_TEXTURE_1D ||
228          target == PIPE_TEXTURE_1D_ARRAY ||
229          target == PIPE_TEXTURE_2D ||
230          target == PIPE_TEXTURE_2D_ARRAY ||
231          target == PIPE_TEXTURE_RECT ||
232          target == PIPE_TEXTURE_3D ||
233          target == PIPE_TEXTURE_CUBE);
234
235   format_desc = util_format_description(format);
236   if (!format_desc)
237      return FALSE;
238
239   if (sample_count > 1)
240      return FALSE;
241
242   if (bind & (PIPE_BIND_DISPLAY_TARGET |
243               PIPE_BIND_SCANOUT |
244               PIPE_BIND_SHARED)) {
245      if(!winsys->is_displaytarget_format_supported(winsys, bind, format))
246         return FALSE;
247   }
248
249   if (bind & PIPE_BIND_RENDER_TARGET) {
250      if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS)
251         return FALSE;
252
253      /*
254       * Although possible, it is unnatural to render into compressed or YUV
255       * surfaces. So disable these here to avoid going into weird paths
256       * inside the state trackers.
257       */
258      if (format_desc->block.width != 1 ||
259          format_desc->block.height != 1)
260         return FALSE;
261   }
262
263   if (bind & PIPE_BIND_DEPTH_STENCIL) {
264      if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
265         return FALSE;
266   }
267
268   /*
269    * All other operations (sampling, transfer, etc).
270    */
271
272   if (format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
273      return util_format_s3tc_enabled;
274   }
275
276   /*
277    * Everything else should be supported by u_format.
278    */
279   return TRUE;
280}
281
282
283static void
284softpipe_destroy_screen( struct pipe_screen *screen )
285{
286   struct softpipe_screen *sp_screen = softpipe_screen(screen);
287   struct sw_winsys *winsys = sp_screen->winsys;
288
289   if(winsys->destroy)
290      winsys->destroy(winsys);
291
292   FREE(screen);
293}
294
295
296/* This is often overriden by the co-state tracker.
297 */
298static void
299softpipe_flush_frontbuffer(struct pipe_screen *_screen,
300                           struct pipe_resource *resource,
301                           unsigned level, unsigned layer,
302                           void *context_private)
303{
304   struct softpipe_screen *screen = softpipe_screen(_screen);
305   struct sw_winsys *winsys = screen->winsys;
306   struct softpipe_resource *texture = softpipe_resource(resource);
307
308   assert(texture->dt);
309   if (texture->dt)
310      winsys->displaytarget_display(winsys, texture->dt, context_private);
311}
312
313/**
314 * Create a new pipe_screen object
315 * Note: we're not presently subclassing pipe_screen (no softpipe_screen).
316 */
317struct pipe_screen *
318softpipe_create_screen(struct sw_winsys *winsys)
319{
320   struct softpipe_screen *screen = CALLOC_STRUCT(softpipe_screen);
321
322   if (!screen)
323      return NULL;
324
325   screen->winsys = winsys;
326
327   screen->base.winsys = NULL;
328   screen->base.destroy = softpipe_destroy_screen;
329
330   screen->base.get_name = softpipe_get_name;
331   screen->base.get_vendor = softpipe_get_vendor;
332   screen->base.get_param = softpipe_get_param;
333   screen->base.get_shader_param = softpipe_get_shader_param;
334   screen->base.get_paramf = softpipe_get_paramf;
335   screen->base.get_video_param = softpipe_get_video_param;
336   screen->base.is_format_supported = softpipe_is_format_supported;
337   screen->base.is_video_format_supported = vl_video_buffer_is_format_supported;
338   screen->base.context_create = softpipe_create_context;
339   screen->base.flush_frontbuffer = softpipe_flush_frontbuffer;
340
341   screen->use_llvm = debug_get_option_use_llvm();
342
343   util_format_s3tc_init();
344
345   softpipe_init_screen_texture_funcs(&screen->base);
346   softpipe_init_screen_fence_funcs(&screen->base);
347
348   return &screen->base;
349}
350