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_SM3:
  75       return 1;
  76    case PIPE_CAP_ANISOTROPIC_FILTER:
  77       return 0;
  78    case PIPE_CAP_POINT_SPRITE:
  79       return 1;
  80    case PIPE_CAP_MAX_RENDER_TARGETS:
  81       return PIPE_MAX_COLOR_BUFS;
  82    case PIPE_CAP_OCCLUSION_QUERY:
  83       return 1;
  84    case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
  85       return 1;
  86    case PIPE_CAP_TEXTURE_MIRROR_REPEAT:
  87       return 1;
  88    case PIPE_CAP_TEXTURE_SHADOW_MAP:
  89       return 1;
  90    case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
  91       return SP_MAX_TEXTURE_2D_LEVELS;
  92    case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
  93       return SP_MAX_TEXTURE_3D_LEVELS;
  94    case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
  95       return SP_MAX_TEXTURE_2D_LEVELS;
  96    case PIPE_CAP_TGSI_CONT_SUPPORTED:
  97       return 1;
  98    case PIPE_CAP_BLEND_EQUATION_SEPARATE:
  99       return 1;
 100    case PIPE_CAP_MAX_CONST_BUFFERS:
 101       return PIPE_MAX_CONSTANT_BUFFERS;
 102    case PIPE_CAP_MAX_CONST_BUFFER_SIZE:
 103       return 4096 * 4 * sizeof(float);
 104    case PIPE_CAP_INDEP_BLEND_ENABLE:
 105       return 1;
 106    case PIPE_CAP_INDEP_BLEND_FUNC:
 107       return 1;
 108    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
 109    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
 110    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
 111    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
 112       return 1;
 113    default:
 114       return 0;
 115    }
 116 }
 117
 118
 119 static float
 120 softpipe_get_paramf(struct pipe_screen *screen, int param)
 121 {
 122    switch (param) {
 123    case PIPE_CAP_MAX_LINE_WIDTH:
 124       /* fall-through */
 125    case PIPE_CAP_MAX_LINE_WIDTH_AA:
 126       return 255.0; /* arbitrary */
 127    case PIPE_CAP_MAX_POINT_WIDTH:
 128       /* fall-through */
 129    case PIPE_CAP_MAX_POINT_WIDTH_AA:
 130       return 255.0; /* arbitrary */
 131    case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
 132       return 16.0; /* not actually signficant at this time */
 133    case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
 134       return 16.0; /* arbitrary */
 135    default:
 136       return 0;
 137    }
 138 }
 139
 140
 141 /**
 142  * Query format support for creating a texture, drawing surface, etc.
 143  * \param format  the format to test
 144  * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
 145  */
 146 static boolean
 147 softpipe_is_format_supported( struct pipe_screen *screen,
 148                               enum pipe_format format,
 149                               enum pipe_texture_target target,
 150                               unsigned sample_count,
 151                               unsigned bind,
 152                               unsigned geom_flags )
 153 {
 154    struct sw_winsys *winsys = softpipe_screen(screen)->winsys;
 155    const struct util_format_description *format_desc;
 156
 157    assert(target == PIPE_TEXTURE_1D ||
 158           target == PIPE_TEXTURE_2D ||
 159           target == PIPE_TEXTURE_3D ||
 160           target == PIPE_TEXTURE_CUBE);
 161
 162    format_desc = util_format_description(format);
 163    if (!format_desc)
 164       return FALSE;
 165
 166    if (sample_count > 1)
 167       return FALSE;
 168
 169    if (bind & (PIPE_BIND_DISPLAY_TARGET |
 170                PIPE_BIND_SCANOUT |
 171                PIPE_BIND_SHARED)) {
 172       if(!winsys->is_displaytarget_format_supported(winsys, bind, format))
 173          return FALSE;
 174    }
 175
 176    if (bind & PIPE_BIND_RENDER_TARGET) {
 177       if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS)
 178          return FALSE;
 179
 180       /*
 181        * Although possible, it is unnatural to render into compressed or YUV
 182        * surfaces. So disable these here to avoid going into weird paths
 183        * inside the state trackers.
 184        */
 185       if (format_desc->block.width != 1 ||
 186           format_desc->block.height != 1)
 187          return FALSE;
 188
 189       /*
 190        * TODO: Unfortunately we cannot render into anything more than 32 bits
 191        * because we encode color clear values into a 32bit word.
 192        */
 193       if (format_desc->block.bits > 32)
 194          return FALSE;
 195    }
 196
 197    if (bind & PIPE_BIND_DEPTH_STENCIL) {
 198       if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
 199          return FALSE;
 200
 201       /*
 202        * TODO: Unfortunately we cannot render into anything more than 32 bits
 203        * because we encode depth and stencil clear values into a 32bit word.
 204        */
 205       if (format_desc->block.bits > 32)
 206          return FALSE;
 207
 208       /*
 209        * TODO: eliminate this restriction
 210        */
 211       if (format == PIPE_FORMAT_Z32_FLOAT)
 212          return FALSE;
 213    }
 214
 215    /*
 216     * All other operations (sampling, transfer, etc).
 217     */
 218
 219    if (format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
 220       return util_format_s3tc_enabled;
 221    }
 222
 223    /*
 224     * Everything else should be supported by u_format.
 225     */
 226    return TRUE;
 227 }
 228
 229
 230 static void
 231 softpipe_destroy_screen( struct pipe_screen *screen )
 232 {
 233    struct softpipe_screen *sp_screen = softpipe_screen(screen);
 234    struct sw_winsys *winsys = sp_screen->winsys;
 235
 236    if(winsys->destroy)
 237       winsys->destroy(winsys);
 238
 239    FREE(screen);
 240 }
 241
 242
 243 /* This is often overriden by the co-state tracker.
 244  */
 245 static void
 246 softpipe_flush_frontbuffer(struct pipe_screen *_screen,
 247                            struct pipe_surface *surface,
 248                            void *context_private)
 249 {
 250    struct softpipe_screen *screen = softpipe_screen(_screen);
 251    struct sw_winsys *winsys = screen->winsys;
 252    struct softpipe_resource *texture = softpipe_resource(surface->texture);
 253
 254    assert(texture->dt);
 255    if (texture->dt)
 256       winsys->displaytarget_display(winsys, texture->dt, context_private);
 257 }
 258
 259 /**
 260  * Create a new pipe_screen object
 261  * Note: we're not presently subclassing pipe_screen (no softpipe_screen).
 262  */
 263 struct pipe_screen *
 264 softpipe_create_screen(struct sw_winsys *winsys)
 265 {
 266    struct softpipe_screen *screen = CALLOC_STRUCT(softpipe_screen);
 267
 268    if (!screen)
 269       return NULL;
 270
 271    screen->winsys = winsys;
 272
 273    screen->base.winsys = NULL;
 274    screen->base.destroy = softpipe_destroy_screen;
 275
 276    screen->base.get_name = softpipe_get_name;
 277    screen->base.get_vendor = softpipe_get_vendor;
 278    screen->base.get_param = softpipe_get_param;
 279    screen->base.get_paramf = softpipe_get_paramf;
 280    screen->base.is_format_supported = softpipe_is_format_supported;
 281    screen->base.context_create = softpipe_create_context;
 282    screen->base.flush_frontbuffer = softpipe_flush_frontbuffer;
 283
 284    util_format_s3tc_init();
 285
 286    softpipe_init_screen_texture_funcs(&screen->base);
 287    softpipe_init_screen_fence_funcs(&screen->base);
 288
 289    return &screen->base;
 290 }