src/gallium/drivers/softpipe/sp_screen.c

   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
  40 static const char *
  41 softpipe_get_vendor(struct pipe_screen *screen)
  42 {
  43    return "Tungsten Graphics, Inc.";
  44 }
  45
  46
  47 static const char *
  48 softpipe_get_name(struct pipe_screen *screen)
  49 {
  50    return "softpipe";
  51 }
  52
  53
  54 static int
  55 softpipe_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 12; /* max 2Kx2K */
  86    case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
  87       return 8;  /* max 128x128x128 */
  88    case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
  89       return 12; /* max 2Kx2K */
  90    default:
  91       return 0;
  92    }
  93 }
  94
  95
  96 static float
  97 softpipe_get_paramf(struct pipe_screen *screen, int param)
  98 {
  99    switch (param) {
 100    case PIPE_CAP_MAX_LINE_WIDTH:
 101       /* fall-through */
 102    case PIPE_CAP_MAX_LINE_WIDTH_AA:
 103       return 255.0; /* arbitrary */
 104    case PIPE_CAP_MAX_POINT_WIDTH:
 105       /* fall-through */
 106    case PIPE_CAP_MAX_POINT_WIDTH_AA:
 107       return 255.0; /* arbitrary */
 108    case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
 109       return 0.0;
 110    case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
 111       return 16.0; /* arbitrary */
 112    default:
 113       return 0;
 114    }
 115 }
 116
 117
 118 /**
 119  * Query format support for creating a texture, drawing surface, etc.
 120  * \param format  the format to test
 121  * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
 122  */
 123 static boolean
 124 softpipe_is_format_supported( struct pipe_screen *screen,
 125                               enum pipe_format format,
 126                               enum pipe_texture_target target,
 127                               unsigned tex_usage,
 128                               unsigned geom_flags )
 129 {
 130    switch(format) {
 131    case PIPE_FORMAT_DXT1_RGB:
 132    case PIPE_FORMAT_DXT1_RGBA:
 133    case PIPE_FORMAT_DXT3_RGBA:
 134    case PIPE_FORMAT_DXT5_RGBA:
 135       return FALSE;
 136    default:
 137       return TRUE;
 138    }
 139 }
 140
 141
 142 static void
 143 softpipe_destroy_screen( struct pipe_screen *screen )
 144 {
 145    struct pipe_winsys *winsys = screen->winsys;
 146
 147    if(winsys->destroy)
 148       winsys->destroy(winsys);
 149
 150    FREE(screen);
 151 }
 152
 153
 154
 155 /**
 156  * Create a new pipe_screen object
 157  * Note: we're not presently subclassing pipe_screen (no softpipe_screen).
 158  */
 159 struct pipe_screen *
 160 softpipe_create_screen(struct pipe_winsys *winsys)
 161 {
 162    struct softpipe_screen *screen = CALLOC_STRUCT(softpipe_screen);
 163
 164    if (!screen)
 165       return NULL;
 166
 167    screen->base.winsys = winsys;
 168
 169    screen->base.destroy = softpipe_destroy_screen;
 170
 171    screen->base.get_name = softpipe_get_name;
 172    screen->base.get_vendor = softpipe_get_vendor;
 173    screen->base.get_param = softpipe_get_param;
 174    screen->base.get_paramf = softpipe_get_paramf;
 175    screen->base.is_format_supported = softpipe_is_format_supported;
 176
 177    softpipe_init_screen_texture_funcs(&screen->base);
 178    u_simple_screen_init(&screen->base);
 179
 180    return &screen->base;
 181 }