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_format.h"
  31 #include "util/u_format_s3tc.h"
  32 #include "pipe/p_defines.h"
  33 #include "pipe/p_screen.h"
  34
  35 #include "state_tracker/sw_winsys.h"
  36
  37 #include "sp_texture.h"
  38 #include "sp_screen.h"
  39 #include "sp_context.h"
  40 #include "sp_fence.h"
  41 #include "sp_public.h"
  42
  43
  44 static const char *
  45 softpipe_get_vendor(struct pipe_screen *screen)
  46 {
  47    return "VMware, Inc.";
  48 }
  49
  50
  51 static const char *
  52 softpipe_get_name(struct pipe_screen *screen)
  53 {
  54    return "softpipe";
  55 }
  56
  57
  58 static int
  59 softpipe_get_param(struct pipe_screen *screen, int param)
  60 {
  61    switch (param) {
  62    case PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS:
  63       return PIPE_MAX_SAMPLERS;
  64    case PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS:
  65       return PIPE_MAX_VERTEX_SAMPLERS;
  66    case PIPE_CAP_MAX_COMBINED_SAMPLERS:
  67       return PIPE_MAX_SAMPLERS + PIPE_MAX_VERTEX_SAMPLERS;
  68    case PIPE_CAP_NPOT_TEXTURES:
  69       return 1;
  70    case PIPE_CAP_TWO_SIDED_STENCIL:
  71       return 1;
  72    case PIPE_CAP_GLSL:
  73       return 1;
  74    case PIPE_CAP_ANISOTROPIC_FILTER:
  75       return 0;
  76    case PIPE_CAP_POINT_SPRITE:
  77       return 1;
  78    case PIPE_CAP_MAX_RENDER_TARGETS:
  79       return PIPE_MAX_COLOR_BUFS;
  80    case PIPE_CAP_OCCLUSION_QUERY:
  81       return 1;
  82    case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
  83       return 1;
  84    case PIPE_CAP_TEXTURE_MIRROR_REPEAT:
  85       return 1;
  86    case PIPE_CAP_TEXTURE_SHADOW_MAP:
  87       return 1;
  88    case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
  89       return SP_MAX_TEXTURE_2D_LEVELS;
  90    case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
  91       return SP_MAX_TEXTURE_3D_LEVELS;
  92    case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
  93       return SP_MAX_TEXTURE_2D_LEVELS;
  94    case PIPE_CAP_TGSI_CONT_SUPPORTED:
  95       return 1;
  96    case PIPE_CAP_BLEND_EQUATION_SEPARATE:
  97       return 1;
  98    case PIPE_CAP_MAX_CONST_BUFFERS:
  99       return PIPE_MAX_CONSTANT_BUFFERS;
 100    case PIPE_CAP_MAX_CONST_BUFFER_SIZE:
 101       return 4096 * 4 * sizeof(float);
 102    case PIPE_CAP_INDEP_BLEND_ENABLE:
 103       return 1;
 104    case PIPE_CAP_INDEP_BLEND_FUNC:
 105       return 1;
 106    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
 107    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
 108    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
 109    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
 110       return 1;
 111    default:
 112       return 0;
 113    }
 114 }
 115
 116
 117 static float
 118 softpipe_get_paramf(struct pipe_screen *screen, int param)
 119 {
 120    switch (param) {
 121    case PIPE_CAP_MAX_LINE_WIDTH:
 122       /* fall-through */
 123    case PIPE_CAP_MAX_LINE_WIDTH_AA:
 124       return 255.0; /* arbitrary */
 125    case PIPE_CAP_MAX_POINT_WIDTH:
 126       /* fall-through */
 127    case PIPE_CAP_MAX_POINT_WIDTH_AA:
 128       return 255.0; /* arbitrary */
 129    case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
 130       return 16.0; /* not actually signficant at this time */
 131    case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
 132       return 16.0; /* arbitrary */
 133    default:
 134       return 0;
 135    }
 136 }
 137
 138
 139 /**
 140  * Query format support for creating a texture, drawing surface, etc.
 141  * \param format  the format to test
 142  * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
 143  */
 144 static boolean
 145 softpipe_is_format_supported( struct pipe_screen *screen,
 146                               enum pipe_format format,
 147                               enum pipe_texture_target target,
 148                               unsigned bind,
 149                               unsigned geom_flags )
 150 {
 151    struct sw_winsys *winsys = softpipe_screen(screen)->winsys;
 152    const struct util_format_description *format_desc;
 153
 154    assert(target == PIPE_TEXTURE_1D ||
 155           target == PIPE_TEXTURE_2D ||
 156           target == PIPE_TEXTURE_3D ||
 157           target == PIPE_TEXTURE_CUBE);
 158
 159    format_desc = util_format_description(format);
 160    if (!format_desc)
 161       return FALSE;
 162
 163    if (bind & (PIPE_BIND_DISPLAY_TARGET |
 164                PIPE_BIND_SCANOUT |
 165                PIPE_BIND_SHARED)) {
 166       if(!winsys->is_displaytarget_format_supported(winsys, bind, format))
 167          return FALSE;
 168    }
 169
 170    if (bind & PIPE_BIND_RENDER_TARGET) {
 171       if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS)
 172          return FALSE;
 173
 174       /*
 175        * Although possible, it is unnatural to render into compressed or YUV
 176        * surfaces. So disable these here to avoid going into weird paths
 177        * inside the state trackers.
 178        */
 179       if (format_desc->block.width != 1 ||
 180           format_desc->block.height != 1)
 181          return FALSE;
 182
 183       /*
 184        * TODO: Unfortunately we cannot render into anything more than 32 bits
 185        * because we encode color clear values into a 32bit word.
 186        */
 187       if (format_desc->block.bits > 32)
 188          return FALSE;
 189    }
 190
 191    if (bind & PIPE_BIND_DEPTH_STENCIL) {
 192       if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
 193          return FALSE;
 194
 195       /*
 196        * TODO: Unfortunately we cannot render into anything more than 32 bits
 197        * because we encode depth and stencil clear values into a 32bit word.
 198        */
 199       if (format_desc->block.bits > 32)
 200          return FALSE;
 201
 202       /*
 203        * TODO: eliminate this restriction
 204        */
 205       if (format == PIPE_FORMAT_Z32_FLOAT)
 206          return FALSE;
 207    }
 208
 209    /*
 210     * All other operations (sampling, transfer, etc).
 211     */
 212
 213    if (format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
 214       return util_format_s3tc_enabled;
 215    }
 216
 217    /*
 218     * Everything else should be supported by u_format.
 219     */
 220    return TRUE;
 221 }
 222
 223
 224 static void
 225 softpipe_destroy_screen( struct pipe_screen *screen )
 226 {
 227    struct softpipe_screen *sp_screen = softpipe_screen(screen);
 228    struct sw_winsys *winsys = sp_screen->winsys;
 229
 230    if(winsys->destroy)
 231       winsys->destroy(winsys);
 232
 233    FREE(screen);
 234 }
 235
 236
 237 /* This is often overriden by the co-state tracker.
 238  */
 239 static void
 240 softpipe_flush_frontbuffer(struct pipe_screen *_screen,
 241                            struct pipe_surface *surface,
 242                            void *context_private)
 243 {
 244    struct softpipe_screen *screen = softpipe_screen(_screen);
 245    struct sw_winsys *winsys = screen->winsys;
 246    struct softpipe_resource *texture = softpipe_resource(surface->texture);
 247
 248    assert(texture->dt);
 249    if (texture->dt)
 250       winsys->displaytarget_display(winsys, texture->dt, context_private);
 251 }
 252
 253 /**
 254  * Create a new pipe_screen object
 255  * Note: we're not presently subclassing pipe_screen (no softpipe_screen).
 256  */
 257 struct pipe_screen *
 258 softpipe_create_screen(struct sw_winsys *winsys)
 259 {
 260    struct softpipe_screen *screen = CALLOC_STRUCT(softpipe_screen);
 261
 262    if (!screen)
 263       return NULL;
 264
 265    screen->winsys = winsys;
 266
 267    screen->base.winsys = NULL;
 268    screen->base.destroy = softpipe_destroy_screen;
 269
 270    screen->base.get_name = softpipe_get_name;
 271    screen->base.get_vendor = softpipe_get_vendor;
 272    screen->base.get_param = softpipe_get_param;
 273    screen->base.get_paramf = softpipe_get_paramf;
 274    screen->base.is_format_supported = softpipe_is_format_supported;
 275    screen->base.context_create = softpipe_create_context;
 276    screen->base.flush_frontbuffer = softpipe_flush_frontbuffer;
 277
 278    util_format_s3tc_init();
 279
 280    softpipe_init_screen_texture_funcs(&screen->base);
 281    softpipe_init_screen_fence_funcs(&screen->base);
 282
 283    return &screen->base;
 284 }