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/internal/p_winsys_screen.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 PIPE_MAX_SAMPLERS;
  59    case PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS:
  60       return PIPE_MAX_SAMPLERS;
  61    case PIPE_CAP_NPOT_TEXTURES:
  62       return 1;
  63    case PIPE_CAP_TWO_SIDED_STENCIL:
  64       return 1;
  65    case PIPE_CAP_GLSL:
  66       return 1;
  67    case PIPE_CAP_S3TC:
  68       return 0;
  69    case PIPE_CAP_ANISOTROPIC_FILTER:
  70       return 0;
  71    case PIPE_CAP_POINT_SPRITE:
  72       return 1;
  73    case PIPE_CAP_MAX_RENDER_TARGETS:
  74       return PIPE_MAX_COLOR_BUFS;
  75    case PIPE_CAP_OCCLUSION_QUERY:
  76       return 1;
  77    case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
  78       return 1;
  79    case PIPE_CAP_TEXTURE_MIRROR_REPEAT:
  80       return 1;
  81    case PIPE_CAP_TEXTURE_SHADOW_MAP:
  82       return 1;
  83    case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
  84       return 12; /* max 2Kx2K */
  85    case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
  86       return 8;  /* max 128x128x128 */
  87    case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
  88       return 12; /* max 2Kx2K */
  89    default:
  90       return 0;
  91    }
  92 }
  93
  94
  95 static float
  96 softpipe_get_paramf(struct pipe_screen *screen, int param)
  97 {
  98    switch (param) {
  99    case PIPE_CAP_MAX_LINE_WIDTH:
 100       /* fall-through */
 101    case PIPE_CAP_MAX_LINE_WIDTH_AA:
 102       return 255.0; /* arbitrary */
 103    case PIPE_CAP_MAX_POINT_WIDTH:
 104       /* fall-through */
 105    case PIPE_CAP_MAX_POINT_WIDTH_AA:
 106       return 255.0; /* arbitrary */
 107    case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
 108       return 0.0;
 109    case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
 110       return 16.0; /* arbitrary */
 111    default:
 112       return 0;
 113    }
 114 }
 115
 116
 117 /**
 118  * Query format support for creating a texture, drawing surface, etc.
 119  * \param format  the format to test
 120  * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
 121  */
 122 static boolean
 123 softpipe_is_format_supported( struct pipe_screen *screen,
 124                               enum pipe_format format,
 125                               enum pipe_texture_target target,
 126                               unsigned tex_usage,
 127                               unsigned geom_flags )
 128 {
 129    switch(format) {
 130    case PIPE_FORMAT_DXT1_RGB:
 131    case PIPE_FORMAT_DXT1_RGBA:
 132    case PIPE_FORMAT_DXT3_RGBA:
 133    case PIPE_FORMAT_DXT5_RGBA:
 134       return FALSE;
 135    default:
 136       return TRUE;
 137    }
 138 }
 139
 140
 141 static void
 142 softpipe_destroy_screen( struct pipe_screen *screen )
 143 {
 144    struct pipe_winsys *winsys = screen->winsys;
 145
 146    if(winsys->destroy)
 147       winsys->destroy(winsys);
 148
 149    FREE(screen);
 150 }
 151
 152
 153
 154 /**
 155  * Create a new pipe_screen object
 156  * Note: we're not presently subclassing pipe_screen (no softpipe_screen).
 157  */
 158 struct pipe_screen *
 159 softpipe_create_screen(struct pipe_winsys *winsys)
 160 {
 161    struct softpipe_screen *screen = CALLOC_STRUCT(softpipe_screen);
 162
 163    if (!screen)
 164       return NULL;
 165
 166    screen->base.winsys = winsys;
 167
 168    screen->base.destroy = softpipe_destroy_screen;
 169
 170    screen->base.get_name = softpipe_get_name;
 171    screen->base.get_vendor = softpipe_get_vendor;
 172    screen->base.get_param = softpipe_get_param;
 173    screen->base.get_paramf = softpipe_get_paramf;
 174    screen->base.is_format_supported = softpipe_is_format_supported;
 175
 176    softpipe_init_screen_texture_funcs(&screen->base);
 177
 178    return &screen->base;
 179 }