lp_screen.c revision 4d52a25326506f8a3e876ded029ff4db7749f8a9 
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_math.h"
31#include "util/u_cpu_detect.h"
32#include "util/u_format.h"
33#include "util/u_format_s3tc.h"
34#include "pipe/p_defines.h"
35#include "pipe/p_screen.h"
36
37#include "lp_texture.h"
38#include "lp_fence.h"
39#include "lp_jit.h"
40#include "lp_screen.h"
41#include "lp_context.h"
42#include "lp_debug.h"
43#include "lp_public.h"
44#include "lp_limits.h"
45
46#include "state_tracker/sw_winsys.h"
47
48#ifdef DEBUG
49int LP_DEBUG = 0;
50
51static const struct debug_named_value lp_debug_flags[] = {
52   { "pipe",   DEBUG_PIPE },
53   { "tgsi",   DEBUG_TGSI },
54   { "tex",    DEBUG_TEX },
55   { "asm",    DEBUG_ASM },
56   { "setup",  DEBUG_SETUP },
57   { "rast",   DEBUG_RAST },
58   { "query",  DEBUG_QUERY },
59   { "screen", DEBUG_SCREEN },
60   { "jit",    DEBUG_JIT },
61   { "show_tiles",    DEBUG_SHOW_TILES },
62   { "show_subtiles", DEBUG_SHOW_SUBTILES },
63   { "counters", DEBUG_COUNTERS },
64   { "nopt", DEBUG_NO_LLVM_OPT },
65   {NULL, 0}
66};
67#endif
68
69
70static const char *
71llvmpipe_get_vendor(struct pipe_screen *screen)
72{
73   return "VMware, Inc.";
74}
75
76
77static const char *
78llvmpipe_get_name(struct pipe_screen *screen)
79{
80   return "llvmpipe";
81}
82
83
84static int
85llvmpipe_get_param(struct pipe_screen *screen, int param)
86{
87   switch (param) {
88   case PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS:
89      return PIPE_MAX_SAMPLERS;
90   case PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS:
91      return 0;
92   case PIPE_CAP_MAX_COMBINED_SAMPLERS:
93      return PIPE_MAX_SAMPLERS + PIPE_MAX_VERTEX_SAMPLERS;
94   case PIPE_CAP_NPOT_TEXTURES:
95      return 1;
96   case PIPE_CAP_TWO_SIDED_STENCIL:
97      return 1;
98   case PIPE_CAP_GLSL:
99      return 1;
100   case PIPE_CAP_SM3:
101      return 1;
102   case PIPE_CAP_ANISOTROPIC_FILTER:
103      return 0;
104   case PIPE_CAP_POINT_SPRITE:
105      return 1;
106   case PIPE_CAP_MAX_RENDER_TARGETS:
107      return PIPE_MAX_COLOR_BUFS;
108   case PIPE_CAP_OCCLUSION_QUERY:
109      return 1;
110   case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
111      return 1;
112   case PIPE_CAP_TEXTURE_MIRROR_REPEAT:
113      return 1;
114   case PIPE_CAP_TEXTURE_SHADOW_MAP:
115      return 1;
116   case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
117      return LP_MAX_TEXTURE_2D_LEVELS;
118   case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
119      return LP_MAX_TEXTURE_3D_LEVELS;
120   case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
121      return LP_MAX_TEXTURE_2D_LEVELS;
122   case PIPE_CAP_TGSI_CONT_SUPPORTED:
123      return 1;
124   case PIPE_CAP_BLEND_EQUATION_SEPARATE:
125      return 1;
126   case PIPE_CAP_INDEP_BLEND_ENABLE:
127      return 0;
128   case PIPE_CAP_INDEP_BLEND_FUNC:
129      return 0;
130   case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
131   case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
132      return 1;
133   case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
134   case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
135      return 0;
136   default:
137      return 0;
138   }
139}
140
141
142static float
143llvmpipe_get_paramf(struct pipe_screen *screen, int param)
144{
145   switch (param) {
146   case PIPE_CAP_MAX_LINE_WIDTH:
147      /* fall-through */
148   case PIPE_CAP_MAX_LINE_WIDTH_AA:
149      return 255.0; /* arbitrary */
150   case PIPE_CAP_MAX_POINT_WIDTH:
151      /* fall-through */
152   case PIPE_CAP_MAX_POINT_WIDTH_AA:
153      return 255.0; /* arbitrary */
154   case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
155      return 16.0; /* not actually signficant at this time */
156   case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
157      return 16.0; /* arbitrary */
158   default:
159      return 0;
160   }
161}
162
163
164/**
165 * Query format support for creating a texture, drawing surface, etc.
166 * \param format  the format to test
167 * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
168 */
169static boolean
170llvmpipe_is_format_supported( struct pipe_screen *_screen,
171                              enum pipe_format format,
172                              enum pipe_texture_target target,
173                              unsigned bind,
174                              unsigned geom_flags )
175{
176   struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
177   struct sw_winsys *winsys = screen->winsys;
178   const struct util_format_description *format_desc;
179
180   format_desc = util_format_description(format);
181   if (!format_desc)
182      return FALSE;
183
184   assert(target == PIPE_TEXTURE_1D ||
185          target == PIPE_TEXTURE_2D ||
186          target == PIPE_TEXTURE_3D ||
187          target == PIPE_TEXTURE_CUBE);
188
189   if (bind & PIPE_BIND_RENDER_TARGET) {
190      if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS)
191         return FALSE;
192
193      if (format_desc->layout != UTIL_FORMAT_LAYOUT_PLAIN)
194         return FALSE;
195
196      if (format_desc->block.width != 1 ||
197          format_desc->block.height != 1)
198         return FALSE;
199   }
200
201   if (bind & PIPE_BIND_DISPLAY_TARGET) {
202      if(!winsys->is_displaytarget_format_supported(winsys, bind, format))
203         return FALSE;
204   }
205
206   if (bind & PIPE_BIND_DEPTH_STENCIL) {
207      if (format_desc->layout != UTIL_FORMAT_LAYOUT_PLAIN)
208         return FALSE;
209
210      if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
211         return FALSE;
212
213      /* FIXME: Temporary restriction. See lp_state_fs.c. */
214      if (format_desc->block.bits != 32)
215         return FALSE;
216   }
217
218   if (format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
219      return util_format_s3tc_enabled;
220   }
221
222   /*
223    * Everything else should be supported by u_format.
224    */
225   return TRUE;
226}
227
228
229
230
231static void
232llvmpipe_flush_frontbuffer(struct pipe_screen *_screen,
233                           struct pipe_surface *surface,
234                           void *context_private)
235{
236   struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
237   struct sw_winsys *winsys = screen->winsys;
238   struct llvmpipe_resource *texture = llvmpipe_resource(surface->texture);
239
240   assert(texture->dt);
241   if (texture->dt)
242      winsys->displaytarget_display(winsys, texture->dt, context_private);
243}
244
245
246static void
247llvmpipe_destroy_screen( struct pipe_screen *_screen )
248{
249   struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
250   struct sw_winsys *winsys = screen->winsys;
251
252   lp_jit_screen_cleanup(screen);
253
254   if(winsys->destroy)
255      winsys->destroy(winsys);
256
257   FREE(screen);
258}
259
260
261
262/**
263 * Create a new pipe_screen object
264 * Note: we're not presently subclassing pipe_screen (no llvmpipe_screen).
265 */
266struct pipe_screen *
267llvmpipe_create_screen(struct sw_winsys *winsys)
268{
269   struct llvmpipe_screen *screen;
270
271#ifdef PIPE_ARCH_X86
272   /* require SSE2 due to LLVM PR6960. */
273   util_cpu_detect();
274   if (!util_cpu_caps.has_sse2)
275       return NULL;
276#endif
277
278   screen = CALLOC_STRUCT(llvmpipe_screen);
279
280#ifdef DEBUG
281   LP_DEBUG = debug_get_flags_option("LP_DEBUG", lp_debug_flags, 0 );
282#endif
283
284   if (!screen)
285      return NULL;
286
287   screen->winsys = winsys;
288
289   screen->base.destroy = llvmpipe_destroy_screen;
290
291   screen->base.get_name = llvmpipe_get_name;
292   screen->base.get_vendor = llvmpipe_get_vendor;
293   screen->base.get_param = llvmpipe_get_param;
294   screen->base.get_paramf = llvmpipe_get_paramf;
295   screen->base.is_format_supported = llvmpipe_is_format_supported;
296
297   screen->base.context_create = llvmpipe_create_context;
298   screen->base.flush_frontbuffer = llvmpipe_flush_frontbuffer;
299
300   llvmpipe_init_screen_resource_funcs(&screen->base);
301   llvmpipe_init_screen_fence_funcs(&screen->base);
302
303   lp_jit_screen_init(screen);
304
305#ifdef PIPE_OS_WINDOWS
306   /* Multithreading not supported on windows until conditions and barriers are
307    * properly implemented. */
308   screen->num_threads = 0;
309#else
310#ifdef PIPE_OS_EMBEDDED
311   screen->num_threads = 0;
312#else
313   screen->num_threads = util_cpu_caps.nr_cpus;
314#endif
315   screen->num_threads = debug_get_num_option("LP_NUM_THREADS", screen->num_threads);
316   screen->num_threads = MIN2(screen->num_threads, LP_MAX_THREADS);
317#endif
318
319   util_format_s3tc_init();
320
321   return &screen->base;
322}
323