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 #include "draw/draw_context.h"
  35
  36 #include "state_tracker/sw_winsys.h"
  37 #include "tgsi/tgsi_exec.h"
  38
  39 #include "sp_texture.h"
  40 #include "sp_screen.h"
  41 #include "sp_context.h"
  42 #include "sp_fence.h"
  43 #include "sp_public.h"
  44
  45
  46 static const char *
  47 softpipe_get_vendor(struct pipe_screen *screen)
  48 {
  49    return "VMware, Inc.";
  50 }
  51
  52
  53 static const char *
  54 softpipe_get_name(struct pipe_screen *screen)
  55 {
  56    return "softpipe";
  57 }
  58
  59
  60 static int
  61 softpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
  62 {
  63    switch (param) {
  64    case PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS:
  65       return PIPE_MAX_SAMPLERS;
  66    case PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS:
  67       return PIPE_MAX_VERTEX_SAMPLERS;
  68    case PIPE_CAP_MAX_COMBINED_SAMPLERS:
  69       return PIPE_MAX_SAMPLERS + PIPE_MAX_VERTEX_SAMPLERS;
  70    case PIPE_CAP_NPOT_TEXTURES:
  71       return 1;
  72    case PIPE_CAP_TWO_SIDED_STENCIL:
  73       return 1;
  74    case PIPE_CAP_GLSL:
  75       return 1;
  76    case PIPE_CAP_SM3:
  77       return 1;
  78    case PIPE_CAP_ANISOTROPIC_FILTER:
  79       return 0;
  80    case PIPE_CAP_POINT_SPRITE:
  81       return 1;
  82    case PIPE_CAP_MAX_RENDER_TARGETS:
  83       return PIPE_MAX_COLOR_BUFS;
  84    case PIPE_CAP_OCCLUSION_QUERY:
  85       return 1;
  86    case PIPE_CAP_TIMER_QUERY:
  87       return 1;
  88    case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
  89       return 1;
  90    case PIPE_CAP_TEXTURE_MIRROR_REPEAT:
  91       return 1;
  92    case PIPE_CAP_TEXTURE_SHADOW_MAP:
  93       return 1;
  94    case PIPE_CAP_TEXTURE_SWIZZLE:
  95       return 1;
  96    case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
  97       return SP_MAX_TEXTURE_2D_LEVELS;
  98    case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
  99       return SP_MAX_TEXTURE_3D_LEVELS;
 100    case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 101       return SP_MAX_TEXTURE_2D_LEVELS;
 102    case PIPE_CAP_BLEND_EQUATION_SEPARATE:
 103       return 1;
 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    case PIPE_CAP_STREAM_OUTPUT:
 114       return 1;
 115    case PIPE_CAP_PRIMITIVE_RESTART:
 116       return 1;
 117    case PIPE_CAP_DEPTHSTENCIL_CLEAR_SEPARATE:
 118       return 0;
 119    case PIPE_CAP_SHADER_STENCIL_EXPORT:
 120       return 1;
 121    default:
 122       return 0;
 123    }
 124 }
 125
 126 static int
 127 softpipe_get_shader_param(struct pipe_screen *screen, unsigned shader, enum pipe_shader_cap param)
 128 {
 129    switch(shader)
 130    {
 131    case PIPE_SHADER_FRAGMENT:
 132       return tgsi_exec_get_shader_param(param);
 133    case PIPE_SHADER_VERTEX:
 134    case PIPE_SHADER_GEOMETRY:
 135       return draw_get_shader_param(shader, param);
 136    default:
 137       return 0;
 138    }
 139 }
 140
 141 static float
 142 softpipe_get_paramf(struct pipe_screen *screen, enum pipe_cap param)
 143 {
 144    switch (param) {
 145    case PIPE_CAP_MAX_LINE_WIDTH:
 146       /* fall-through */
 147    case PIPE_CAP_MAX_LINE_WIDTH_AA:
 148       return 255.0; /* arbitrary */
 149    case PIPE_CAP_MAX_POINT_WIDTH:
 150       /* fall-through */
 151    case PIPE_CAP_MAX_POINT_WIDTH_AA:
 152       return 255.0; /* arbitrary */
 153    case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
 154       return 16.0; /* not actually signficant at this time */
 155    case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
 156       return 16.0; /* arbitrary */
 157    default:
 158       return 0;
 159    }
 160 }
 161
 162
 163 /**
 164  * Query format support for creating a texture, drawing surface, etc.
 165  * \param format  the format to test
 166  * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
 167  */
 168 static boolean
 169 softpipe_is_format_supported( struct pipe_screen *screen,
 170                               enum pipe_format format,
 171                               enum pipe_texture_target target,
 172                               unsigned sample_count,
 173                               unsigned bind,
 174                               unsigned geom_flags )
 175 {
 176    struct sw_winsys *winsys = softpipe_screen(screen)->winsys;
 177    const struct util_format_description *format_desc;
 178
 179    assert(target == PIPE_BUFFER ||
 180           target == PIPE_TEXTURE_1D ||
 181           target == PIPE_TEXTURE_2D ||
 182           target == PIPE_TEXTURE_RECT ||
 183           target == PIPE_TEXTURE_3D ||
 184           target == PIPE_TEXTURE_CUBE);
 185
 186    format_desc = util_format_description(format);
 187    if (!format_desc)
 188       return FALSE;
 189
 190    if (sample_count > 1)
 191       return FALSE;
 192
 193    if (bind & (PIPE_BIND_DISPLAY_TARGET |
 194                PIPE_BIND_SCANOUT |
 195                PIPE_BIND_SHARED)) {
 196       if(!winsys->is_displaytarget_format_supported(winsys, bind, format))
 197          return FALSE;
 198    }
 199
 200    if (bind & PIPE_BIND_RENDER_TARGET) {
 201       if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS)
 202          return FALSE;
 203
 204       /*
 205        * Although possible, it is unnatural to render into compressed or YUV
 206        * surfaces. So disable these here to avoid going into weird paths
 207        * inside the state trackers.
 208        */
 209       if (format_desc->block.width != 1 ||
 210           format_desc->block.height != 1)
 211          return FALSE;
 212
 213       /*
 214        * TODO: Unfortunately we cannot render into anything more than 32 bits
 215        * because we encode color clear values into a 32bit word.
 216        */
 217       if (format_desc->block.bits > 32)
 218          return FALSE;
 219    }
 220
 221    if (bind & PIPE_BIND_DEPTH_STENCIL) {
 222       if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
 223          return FALSE;
 224
 225       /*
 226        * TODO: Unfortunately we cannot render into anything more than 32 bits
 227        * because we encode depth and stencil clear values into a 32bit word.
 228        */
 229       if (format_desc->block.bits > 32)
 230          return FALSE;
 231
 232       /*
 233        * TODO: eliminate this restriction
 234        */
 235       if (format == PIPE_FORMAT_Z32_FLOAT)
 236          return FALSE;
 237    }
 238
 239    /*
 240     * All other operations (sampling, transfer, etc).
 241     */
 242
 243    if (format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
 244       return util_format_s3tc_enabled;
 245    }
 246
 247    /*
 248     * Everything else should be supported by u_format.
 249     */
 250    return TRUE;
 251 }
 252
 253
 254 static void
 255 softpipe_destroy_screen( struct pipe_screen *screen )
 256 {
 257    struct softpipe_screen *sp_screen = softpipe_screen(screen);
 258    struct sw_winsys *winsys = sp_screen->winsys;
 259
 260    if(winsys->destroy)
 261       winsys->destroy(winsys);
 262
 263    FREE(screen);
 264 }
 265
 266
 267 /* This is often overriden by the co-state tracker.
 268  */
 269 static void
 270 softpipe_flush_frontbuffer(struct pipe_screen *_screen,
 271                            struct pipe_surface *surface,
 272                            void *context_private)
 273 {
 274    struct softpipe_screen *screen = softpipe_screen(_screen);
 275    struct sw_winsys *winsys = screen->winsys;
 276    struct softpipe_resource *texture = softpipe_resource(surface->texture);
 277
 278    assert(texture->dt);
 279    if (texture->dt)
 280       winsys->displaytarget_display(winsys, texture->dt, context_private);
 281 }
 282
 283 /**
 284  * Create a new pipe_screen object
 285  * Note: we're not presently subclassing pipe_screen (no softpipe_screen).
 286  */
 287 struct pipe_screen *
 288 softpipe_create_screen(struct sw_winsys *winsys)
 289 {
 290    struct softpipe_screen *screen = CALLOC_STRUCT(softpipe_screen);
 291
 292    if (!screen)
 293       return NULL;
 294
 295    screen->winsys = winsys;
 296
 297    screen->base.winsys = NULL;
 298    screen->base.destroy = softpipe_destroy_screen;
 299
 300    screen->base.get_name = softpipe_get_name;
 301    screen->base.get_vendor = softpipe_get_vendor;
 302    screen->base.get_param = softpipe_get_param;
 303    screen->base.get_shader_param = softpipe_get_shader_param;
 304    screen->base.get_paramf = softpipe_get_paramf;
 305    screen->base.is_format_supported = softpipe_is_format_supported;
 306    screen->base.context_create = softpipe_create_context;
 307    screen->base.flush_frontbuffer = softpipe_flush_frontbuffer;
 308
 309    util_format_s3tc_init();
 310
 311    softpipe_init_screen_texture_funcs(&screen->base);
 312    softpipe_init_screen_fence_funcs(&screen->base);
 313
 314    return &screen->base;
 315 }