lp_screen.c revision 36a0819ff4ede1af91dcf909106cf20659856384 
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 "pipe/p_defines.h"
32#include "pipe/p_screen.h"
33
34#include "lp_texture.h"
35#include "lp_buffer.h"
36#include "lp_fence.h"
37#include "lp_winsys.h"
38#include "lp_jit.h"
39#include "lp_screen.h"
40#include "lp_debug.h"
41
42#ifdef DEBUG
43int LP_DEBUG = 0;
44
45static const struct debug_named_value lp_debug_flags[] = {
46   { "pipe",   DEBUG_PIPE },
47   { "tgsi",   DEBUG_TGSI },
48   { "tex",    DEBUG_TEX },
49   { "asm",    DEBUG_ASM },
50   { "setup",  DEBUG_SETUP },
51   { "rast",   DEBUG_RAST },
52   { "query",  DEBUG_QUERY },
53   { "screen", DEBUG_SCREEN },
54   { "jit",    DEBUG_JIT },
55   { "show_tiles",    DEBUG_SHOW_TILES },
56   { "show_subtiles", DEBUG_SHOW_SUBTILES },
57   { "counters", DEBUG_COUNTERS },
58   { "nopt", DEBUG_NO_LLVM_OPT },
59   {NULL, 0}
60};
61#endif
62
63
64static const char *
65llvmpipe_get_vendor(struct pipe_screen *screen)
66{
67   return "VMware, Inc.";
68}
69
70
71static const char *
72llvmpipe_get_name(struct pipe_screen *screen)
73{
74   return "llvmpipe";
75}
76
77
78static int
79llvmpipe_get_param(struct pipe_screen *screen, int param)
80{
81   switch (param) {
82   case PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS:
83      return PIPE_MAX_SAMPLERS;
84   case PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS:
85      return PIPE_MAX_VERTEX_SAMPLERS;
86   case PIPE_CAP_MAX_COMBINED_SAMPLERS:
87      return PIPE_MAX_SAMPLERS + PIPE_MAX_VERTEX_SAMPLERS;
88   case PIPE_CAP_NPOT_TEXTURES:
89      return 1;
90   case PIPE_CAP_TWO_SIDED_STENCIL:
91      return 1;
92   case PIPE_CAP_GLSL:
93      return 1;
94   case PIPE_CAP_ANISOTROPIC_FILTER:
95      return 0;
96   case PIPE_CAP_POINT_SPRITE:
97      return 1;
98   case PIPE_CAP_MAX_RENDER_TARGETS:
99      return PIPE_MAX_COLOR_BUFS;
100   case PIPE_CAP_OCCLUSION_QUERY:
101      return 1;
102   case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
103      return 1;
104   case PIPE_CAP_TEXTURE_MIRROR_REPEAT:
105      return 1;
106   case PIPE_CAP_TEXTURE_SHADOW_MAP:
107      return 1;
108   case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
109      return 13; /* max 4Kx4K */
110   case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
111      return 9;  /* max 256x256x256 */
112   case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
113      return 13; /* max 4Kx4K */
114   case PIPE_CAP_TGSI_CONT_SUPPORTED:
115      return 1;
116   case PIPE_CAP_BLEND_EQUATION_SEPARATE:
117      return 1;
118   default:
119      return 0;
120   }
121}
122
123
124static float
125llvmpipe_get_paramf(struct pipe_screen *screen, int param)
126{
127   switch (param) {
128   case PIPE_CAP_MAX_LINE_WIDTH:
129      /* fall-through */
130   case PIPE_CAP_MAX_LINE_WIDTH_AA:
131      return 255.0; /* arbitrary */
132   case PIPE_CAP_MAX_POINT_WIDTH:
133      /* fall-through */
134   case PIPE_CAP_MAX_POINT_WIDTH_AA:
135      return 255.0; /* arbitrary */
136   case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
137      return 16.0; /* not actually signficant at this time */
138   case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
139      return 16.0; /* arbitrary */
140   default:
141      return 0;
142   }
143}
144
145
146/**
147 * Query format support for creating a texture, drawing surface, etc.
148 * \param format  the format to test
149 * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
150 */
151static boolean
152llvmpipe_is_format_supported( struct pipe_screen *_screen,
153                              enum pipe_format format,
154                              enum pipe_texture_target target,
155                              unsigned tex_usage,
156                              unsigned geom_flags )
157{
158   struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
159   struct llvmpipe_winsys *winsys = screen->winsys;
160   const struct util_format_description *format_desc;
161
162   format_desc = util_format_description(format);
163   if(!format_desc)
164      return FALSE;
165
166   assert(target == PIPE_TEXTURE_1D ||
167          target == PIPE_TEXTURE_2D ||
168          target == PIPE_TEXTURE_3D ||
169          target == PIPE_TEXTURE_CUBE);
170
171   switch(format) {
172   case PIPE_FORMAT_DXT1_RGB:
173   case PIPE_FORMAT_DXT1_RGBA:
174   case PIPE_FORMAT_DXT3_RGBA:
175   case PIPE_FORMAT_DXT5_RGBA:
176      return FALSE;
177   default:
178      break;
179   }
180
181   if(tex_usage & PIPE_TEXTURE_USAGE_RENDER_TARGET) {
182      if(format_desc->block.width != 1 ||
183         format_desc->block.height != 1)
184         return FALSE;
185
186      if(format_desc->layout != UTIL_FORMAT_LAYOUT_SCALAR &&
187         format_desc->layout != UTIL_FORMAT_LAYOUT_ARITH &&
188         format_desc->layout != UTIL_FORMAT_LAYOUT_ARRAY)
189         return FALSE;
190
191      if(format_desc->colorspace != UTIL_FORMAT_COLORSPACE_RGB &&
192         format_desc->colorspace != UTIL_FORMAT_COLORSPACE_SRGB)
193         return FALSE;
194   }
195
196   if(tex_usage & PIPE_TEXTURE_USAGE_DISPLAY_TARGET) {
197      if(!winsys->is_displaytarget_format_supported(winsys, format))
198         return FALSE;
199   }
200
201   if(tex_usage & PIPE_TEXTURE_USAGE_DEPTH_STENCIL) {
202      if(format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
203         return FALSE;
204
205      /* FIXME: Temporary restriction. See lp_state_fs.c. */
206      if(format_desc->block.bits != 32)
207         return FALSE;
208   }
209
210   /* FIXME: Temporary restrictions. See lp_bld_sample_soa.c */
211   if(tex_usage & PIPE_TEXTURE_USAGE_SAMPLER) {
212      if(format_desc->block.width != 1 ||
213         format_desc->block.height != 1)
214         return FALSE;
215
216      if(format_desc->layout != UTIL_FORMAT_LAYOUT_SCALAR &&
217         format_desc->layout != UTIL_FORMAT_LAYOUT_ARITH &&
218         format_desc->layout != UTIL_FORMAT_LAYOUT_ARRAY)
219         return FALSE;
220
221      if(format_desc->colorspace != UTIL_FORMAT_COLORSPACE_RGB &&
222         format_desc->colorspace != UTIL_FORMAT_COLORSPACE_SRGB &&
223         format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
224         return FALSE;
225   }
226
227   return TRUE;
228}
229
230
231static struct pipe_buffer *
232llvmpipe_surface_buffer_create(struct pipe_screen *screen,
233                               unsigned width, unsigned height,
234                               enum pipe_format format,
235                               unsigned tex_usage,
236                               unsigned usage,
237                               unsigned *stride)
238{
239   /* This function should never be used */
240   assert(0);
241   return NULL;
242}
243
244
245static void
246llvmpipe_flush_frontbuffer(struct pipe_screen *_screen,
247                           struct pipe_surface *surface,
248                           void *context_private)
249{
250   struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
251   struct llvmpipe_winsys *winsys = screen->winsys;
252   struct llvmpipe_texture *texture = llvmpipe_texture(surface->texture);
253
254   assert(texture->dt);
255   if (texture->dt)
256      winsys->displaytarget_display(winsys, texture->dt, context_private);
257}
258
259
260static void
261llvmpipe_destroy_screen( struct pipe_screen *_screen )
262{
263   struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
264   struct llvmpipe_winsys *winsys = screen->winsys;
265
266   lp_jit_screen_cleanup(screen);
267
268   if(winsys->destroy)
269      winsys->destroy(winsys);
270
271   FREE(screen);
272}
273
274
275
276/**
277 * Create a new pipe_screen object
278 * Note: we're not presently subclassing pipe_screen (no llvmpipe_screen).
279 */
280struct pipe_screen *
281llvmpipe_create_screen(struct llvmpipe_winsys *winsys)
282{
283   struct llvmpipe_screen *screen = CALLOC_STRUCT(llvmpipe_screen);
284
285#ifdef DEBUG
286   LP_DEBUG = debug_get_flags_option("LP_DEBUG", lp_debug_flags, 0 );
287#endif
288
289   if (!screen)
290      return NULL;
291
292   screen->winsys = winsys;
293
294   screen->base.destroy = llvmpipe_destroy_screen;
295
296   screen->base.get_name = llvmpipe_get_name;
297   screen->base.get_vendor = llvmpipe_get_vendor;
298   screen->base.get_param = llvmpipe_get_param;
299   screen->base.get_paramf = llvmpipe_get_paramf;
300   screen->base.is_format_supported = llvmpipe_is_format_supported;
301
302   screen->base.surface_buffer_create = llvmpipe_surface_buffer_create;
303   screen->base.flush_frontbuffer = llvmpipe_flush_frontbuffer;
304
305   llvmpipe_init_screen_texture_funcs(&screen->base);
306   llvmpipe_init_screen_buffer_funcs(&screen->base);
307   llvmpipe_init_screen_fence_funcs(&screen->base);
308
309   lp_jit_screen_init(screen);
310
311   return &screen->base;
312}
313