sp_screen.c revision 940ca2e837efe45caae1cf1d9665f6736347705d 
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_simple_screen.h"
31#include "pipe/internal/p_winsys_screen.h"
32#include "pipe/p_defines.h"
33#include "pipe/p_screen.h"
34
35#include "sp_texture.h"
36#include "sp_winsys.h"
37#include "sp_screen.h"
38
39
40static const char *
41softpipe_get_vendor(struct pipe_screen *screen)
42{
43   return "Tungsten Graphics, Inc.";
44}
45
46
47static const char *
48softpipe_get_name(struct pipe_screen *screen)
49{
50   return "softpipe";
51}
52
53
54static int
55softpipe_get_param(struct pipe_screen *screen, int param)
56{
57   switch (param) {
58   case PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS:
59      return PIPE_MAX_SAMPLERS;
60   case PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS:
61      return PIPE_MAX_SAMPLERS;
62   case PIPE_CAP_NPOT_TEXTURES:
63      return 1;
64   case PIPE_CAP_TWO_SIDED_STENCIL:
65      return 1;
66   case PIPE_CAP_GLSL:
67      return 1;
68   case PIPE_CAP_S3TC:
69      return 0;
70   case PIPE_CAP_ANISOTROPIC_FILTER:
71      return 0;
72   case PIPE_CAP_POINT_SPRITE:
73      return 1;
74   case PIPE_CAP_MAX_RENDER_TARGETS:
75      return PIPE_MAX_COLOR_BUFS;
76   case PIPE_CAP_OCCLUSION_QUERY:
77      return 1;
78   case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
79      return 1;
80   case PIPE_CAP_TEXTURE_MIRROR_REPEAT:
81      return 1;
82   case PIPE_CAP_TEXTURE_SHADOW_MAP:
83      return 1;
84   case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
85      return 13; /* max 4Kx4K */
86   case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
87      return 9;  /* max 256x256x256 */
88   case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
89      return 13; /* max 4Kx4K */
90   case PIPE_CAP_TGSI_CONT_SUPPORTED:
91      return 1;
92   case PIPE_CAP_BLEND_EQUATION_SEPARATE:
93      return 1;
94   default:
95      return 0;
96   }
97}
98
99
100static float
101softpipe_get_paramf(struct pipe_screen *screen, int param)
102{
103   switch (param) {
104   case PIPE_CAP_MAX_LINE_WIDTH:
105      /* fall-through */
106   case PIPE_CAP_MAX_LINE_WIDTH_AA:
107      return 255.0; /* arbitrary */
108   case PIPE_CAP_MAX_POINT_WIDTH:
109      /* fall-through */
110   case PIPE_CAP_MAX_POINT_WIDTH_AA:
111      return 255.0; /* arbitrary */
112   case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
113      return 16.0; /* not actually signficant at this time */
114   case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
115      return 16.0; /* arbitrary */
116   default:
117      return 0;
118   }
119}
120
121
122/**
123 * Query format support for creating a texture, drawing surface, etc.
124 * \param format  the format to test
125 * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
126 */
127static boolean
128softpipe_is_format_supported( struct pipe_screen *screen,
129                              enum pipe_format format,
130                              enum pipe_texture_target target,
131                              unsigned tex_usage,
132                              unsigned geom_flags )
133{
134   assert(target == PIPE_TEXTURE_1D ||
135          target == PIPE_TEXTURE_2D ||
136          target == PIPE_TEXTURE_3D ||
137          target == PIPE_TEXTURE_CUBE);
138
139   switch(format) {
140   case PIPE_FORMAT_DXT1_RGB:
141   case PIPE_FORMAT_DXT1_RGBA:
142   case PIPE_FORMAT_DXT3_RGBA:
143   case PIPE_FORMAT_DXT5_RGBA:
144      return FALSE;
145   default:
146      return TRUE;
147   }
148}
149
150
151static void
152softpipe_destroy_screen( struct pipe_screen *screen )
153{
154   struct pipe_winsys *winsys = screen->winsys;
155
156   if(winsys->destroy)
157      winsys->destroy(winsys);
158
159   FREE(screen);
160}
161
162
163
164/**
165 * Create a new pipe_screen object
166 * Note: we're not presently subclassing pipe_screen (no softpipe_screen).
167 */
168struct pipe_screen *
169softpipe_create_screen(struct pipe_winsys *winsys)
170{
171   struct softpipe_screen *screen = CALLOC_STRUCT(softpipe_screen);
172
173   if (!screen)
174      return NULL;
175
176   screen->base.winsys = winsys;
177
178   screen->base.destroy = softpipe_destroy_screen;
179
180   screen->base.get_name = softpipe_get_name;
181   screen->base.get_vendor = softpipe_get_vendor;
182   screen->base.get_param = softpipe_get_param;
183   screen->base.get_paramf = softpipe_get_paramf;
184   screen->base.is_format_supported = softpipe_is_format_supported;
185
186   softpipe_init_screen_texture_funcs(&screen->base);
187   u_simple_screen_init(&screen->base);
188
189   return &screen->base;
190}
191