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 "pipe/p_winsys.h"
  31 #include "pipe/p_defines.h"
  32 #include "pipe/p_screen.h"
  33
  34 #include "sp_texture.h"
  35 #include "sp_winsys.h"
  36 #include "sp_screen.h"
  37
  38
  39 static const char *
  40 softpipe_get_vendor(struct pipe_screen *screen)
  41 {
  42    return "Tungsten Graphics, Inc.";
  43 }
  44
  45
  46 static const char *
  47 softpipe_get_name(struct pipe_screen *screen)
  48 {
  49    return "softpipe";
  50 }
  51
  52
  53 static int
  54 softpipe_get_param(struct pipe_screen *screen, int param)
  55 {
  56    switch (param) {
  57    case PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS:
  58       return 8;
  59    case PIPE_CAP_NPOT_TEXTURES:
  60       return 1;
  61    case PIPE_CAP_TWO_SIDED_STENCIL:
  62       return 1;
  63    case PIPE_CAP_GLSL:
  64       return 1;
  65    case PIPE_CAP_S3TC:
  66       return 0;
  67    case PIPE_CAP_ANISOTROPIC_FILTER:
  68       return 0;
  69    case PIPE_CAP_POINT_SPRITE:
  70       return 1;
  71    case PIPE_CAP_MAX_RENDER_TARGETS:
  72       return PIPE_MAX_COLOR_BUFS;
  73    case PIPE_CAP_OCCLUSION_QUERY:
  74       return 1;
  75    case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
  76       return 1;
  77    case PIPE_CAP_TEXTURE_MIRROR_REPEAT:
  78       return 1;
  79    case PIPE_CAP_TEXTURE_SHADOW_MAP:
  80       return 1;
  81    case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
  82       return 12; /* max 2Kx2K */
  83    case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
  84       return 8;  /* max 128x128x128 */
  85    case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
  86       return 12; /* max 2Kx2K */
  87    default:
  88       return 0;
  89    }
  90 }
  91
  92
  93 static float
  94 softpipe_get_paramf(struct pipe_screen *screen, int param)
  95 {
  96    switch (param) {
  97    case PIPE_CAP_MAX_LINE_WIDTH:
  98       /* fall-through */
  99    case PIPE_CAP_MAX_LINE_WIDTH_AA:
 100       return 255.0; /* arbitrary */
 101    case PIPE_CAP_MAX_POINT_WIDTH:
 102       /* fall-through */
 103    case PIPE_CAP_MAX_POINT_WIDTH_AA:
 104       return 255.0; /* arbitrary */
 105    case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
 106       return 0.0;
 107    case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
 108       return 16.0; /* arbitrary */
 109    default:
 110       return 0;
 111    }
 112 }
 113
 114
 115 /**
 116  * Query format support for creating a texture, drawing surface, etc.
 117  * \param format  the format to test
 118  * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
 119  */
 120 static boolean
 121 softpipe_is_format_supported( struct pipe_screen *screen,
 122                               enum pipe_format format,
 123                               enum pipe_texture_target target,
 124                               unsigned tex_usage,
 125                               unsigned geom_flags )
 126 {
 127    switch(format) {
 128    case PIPE_FORMAT_DXT1_RGB:
 129    case PIPE_FORMAT_DXT1_RGBA:
 130    case PIPE_FORMAT_DXT3_RGBA:
 131    case PIPE_FORMAT_DXT5_RGBA:
 132       return FALSE;
 133    default:
 134       return TRUE;
 135    }
 136 }
 137
 138
 139 static void
 140 softpipe_destroy_screen( struct pipe_screen *screen )
 141 {
 142    struct pipe_winsys *winsys = screen->winsys;
 143
 144    if(winsys->destroy)
 145       winsys->destroy(winsys);
 146
 147    FREE(screen);
 148 }
 149
 150
 151
 152 /**
 153  * Create a new pipe_screen object
 154  * Note: we're not presently subclassing pipe_screen (no softpipe_screen).
 155  */
 156 struct pipe_screen *
 157 softpipe_create_screen(struct pipe_winsys *winsys)
 158 {
 159    struct softpipe_screen *screen = CALLOC_STRUCT(softpipe_screen);
 160
 161    if (!screen)
 162       return NULL;
 163
 164    screen->base.winsys = winsys;
 165
 166    screen->base.destroy = softpipe_destroy_screen;
 167
 168    screen->base.get_name = softpipe_get_name;
 169    screen->base.get_vendor = softpipe_get_vendor;
 170    screen->base.get_param = softpipe_get_param;
 171    screen->base.get_paramf = softpipe_get_paramf;
 172    screen->base.is_format_supported = softpipe_is_format_supported;
 173
 174    softpipe_init_screen_texture_funcs(&screen->base);
 175
 176    return &screen->base;
 177 }