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