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 "util/u_video.h"
  33 #include "pipe/p_defines.h"
  34 #include "pipe/p_screen.h"
  35 #include "draw/draw_context.h"
  36 #include "vl/vl_decoder.h"
  37 #include "vl/vl_video_buffer.h"
  38
  39 #include "state_tracker/sw_winsys.h"
  40 #include "tgsi/tgsi_exec.h"
  41
  42 #include "sp_texture.h"
  43 #include "sp_screen.h"
  44 #include "sp_context.h"
  45 #include "sp_fence.h"
  46 #include "sp_public.h"
  47
  48
  49 static const char *
  50 softpipe_get_vendor(struct pipe_screen *screen)
  51 {
  52    return "VMware, Inc.";
  53 }
  54
  55
  56 static const char *
  57 softpipe_get_name(struct pipe_screen *screen)
  58 {
  59    return "softpipe";
  60 }
  61
  62
  63 static int
  64 softpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
  65 {
  66    switch (param) {
  67    case PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS:
  68       return PIPE_MAX_SAMPLERS;
  69    case PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS:
  70 #ifdef HAVE_LLVM
  71       /* Softpipe doesn't yet know how to tell draw/llvm about textures */
  72       return 0;
  73 #else
  74       return PIPE_MAX_VERTEX_SAMPLERS;
  75 #endif
  76    case PIPE_CAP_MAX_COMBINED_SAMPLERS:
  77       return PIPE_MAX_SAMPLERS + PIPE_MAX_VERTEX_SAMPLERS;
  78    case PIPE_CAP_NPOT_TEXTURES:
  79       return 1;
  80    case PIPE_CAP_TWO_SIDED_STENCIL:
  81       return 1;
  82    case PIPE_CAP_GLSL:
  83       return 1;
  84    case PIPE_CAP_SM3:
  85       return 1;
  86    case PIPE_CAP_ANISOTROPIC_FILTER:
  87       return 1;
  88    case PIPE_CAP_POINT_SPRITE:
  89       return 1;
  90    case PIPE_CAP_MAX_RENDER_TARGETS:
  91       return PIPE_MAX_COLOR_BUFS;
  92    case PIPE_CAP_OCCLUSION_QUERY:
  93       return 1;
  94    case PIPE_CAP_TIMER_QUERY:
  95       return 1;
  96    case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
  97       return 1;
  98    case PIPE_CAP_TEXTURE_MIRROR_REPEAT:
  99       return 1;
 100    case PIPE_CAP_TEXTURE_SHADOW_MAP:
 101       return 1;
 102    case PIPE_CAP_TEXTURE_SWIZZLE:
 103       return 1;
 104    case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
 105       return SP_MAX_TEXTURE_2D_LEVELS;
 106    case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
 107       return SP_MAX_TEXTURE_3D_LEVELS;
 108    case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 109       return SP_MAX_TEXTURE_2D_LEVELS;
 110    case PIPE_CAP_BLEND_EQUATION_SEPARATE:
 111       return 1;
 112    case PIPE_CAP_INDEP_BLEND_ENABLE:
 113       return 1;
 114    case PIPE_CAP_INDEP_BLEND_FUNC:
 115       return 1;
 116    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
 117    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
 118    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
 119    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
 120       return 1;
 121    case PIPE_CAP_STREAM_OUTPUT:
 122       return 1;
 123    case PIPE_CAP_PRIMITIVE_RESTART:
 124       return 1;
 125    case PIPE_CAP_DEPTHSTENCIL_CLEAR_SEPARATE:
 126       return 0;
 127    case PIPE_CAP_SHADER_STENCIL_EXPORT:
 128       return 1;
 129    case PIPE_CAP_TGSI_INSTANCEID:
 130    case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
 131       return 1;
 132    case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
 133       return 64; /* matches core Mesa defaults */
 134    case PIPE_CAP_MIN_TEXEL_OFFSET:
 135       return -8;
 136    case PIPE_CAP_MAX_TEXEL_OFFSET:
 137       return 7;
 138    default:
 139       return 0;
 140    }
 141 }
 142
 143 static int
 144 softpipe_get_shader_param(struct pipe_screen *screen, unsigned shader, enum pipe_shader_cap param)
 145 {
 146    switch(shader)
 147    {
 148    case PIPE_SHADER_FRAGMENT:
 149       return tgsi_exec_get_shader_param(param);
 150    case PIPE_SHADER_VERTEX:
 151    case PIPE_SHADER_GEOMETRY:
 152       return draw_get_shader_param(shader, param);
 153    default:
 154       return 0;
 155    }
 156 }
 157
 158 static float
 159 softpipe_get_paramf(struct pipe_screen *screen, enum pipe_cap param)
 160 {
 161    switch (param) {
 162    case PIPE_CAP_MAX_LINE_WIDTH:
 163       /* fall-through */
 164    case PIPE_CAP_MAX_LINE_WIDTH_AA:
 165       return 255.0; /* arbitrary */
 166    case PIPE_CAP_MAX_POINT_WIDTH:
 167       /* fall-through */
 168    case PIPE_CAP_MAX_POINT_WIDTH_AA:
 169       return 255.0; /* arbitrary */
 170    case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
 171       return 16.0;
 172    case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
 173       return 16.0; /* arbitrary */
 174    default:
 175       return 0;
 176    }
 177 }
 178
 179 static int
 180 softpipe_get_video_param(struct pipe_screen *screen,
 181                          enum pipe_video_profile profile,
 182                          enum pipe_video_cap param)
 183 {
 184    switch (param) {
 185    case PIPE_VIDEO_CAP_SUPPORTED:
 186        return vl_profile_supported(screen, profile);
 187    case PIPE_VIDEO_CAP_NPOT_TEXTURES:
 188       return 0;
 189    case PIPE_VIDEO_CAP_MAX_WIDTH:
 190    case PIPE_VIDEO_CAP_MAX_HEIGHT:
 191       return vl_video_buffer_max_size(screen);
 192    case PIPE_VIDEO_CAP_NUM_BUFFERS_DESIRED:
 193       return vl_num_buffers_desired(screen, profile);
 194    default:
 195       return 0;
 196    }
 197 }
 198
 199 /**
 200  * Query format support for creating a texture, drawing surface, etc.
 201  * \param format  the format to test
 202  * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
 203  */
 204 static boolean
 205 softpipe_is_format_supported( struct pipe_screen *screen,
 206                               enum pipe_format format,
 207                               enum pipe_texture_target target,
 208                               unsigned sample_count,
 209                               unsigned bind)
 210 {
 211    struct sw_winsys *winsys = softpipe_screen(screen)->winsys;
 212    const struct util_format_description *format_desc;
 213
 214    assert(target == PIPE_BUFFER ||
 215           target == PIPE_TEXTURE_1D ||
 216           target == PIPE_TEXTURE_1D_ARRAY ||
 217           target == PIPE_TEXTURE_2D ||
 218           target == PIPE_TEXTURE_2D_ARRAY ||
 219           target == PIPE_TEXTURE_RECT ||
 220           target == PIPE_TEXTURE_3D ||
 221           target == PIPE_TEXTURE_CUBE);
 222
 223    format_desc = util_format_description(format);
 224    if (!format_desc)
 225       return FALSE;
 226
 227    if (sample_count > 1)
 228       return FALSE;
 229
 230    if (bind & (PIPE_BIND_DISPLAY_TARGET |
 231                PIPE_BIND_SCANOUT |
 232                PIPE_BIND_SHARED)) {
 233       if(!winsys->is_displaytarget_format_supported(winsys, bind, format))
 234          return FALSE;
 235    }
 236
 237    if (bind & PIPE_BIND_RENDER_TARGET) {
 238       if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS)
 239          return FALSE;
 240
 241       /*
 242        * Although possible, it is unnatural to render into compressed or YUV
 243        * surfaces. So disable these here to avoid going into weird paths
 244        * inside the state trackers.
 245        */
 246       if (format_desc->block.width != 1 ||
 247           format_desc->block.height != 1)
 248          return FALSE;
 249    }
 250
 251    if (bind & PIPE_BIND_DEPTH_STENCIL) {
 252       if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
 253          return FALSE;
 254
 255       /*
 256        * TODO: Unfortunately we cannot render into anything more than 32 bits
 257        * because we encode depth and stencil clear values into a 32bit word.
 258        */
 259       if (format_desc->block.bits > 32)
 260          return FALSE;
 261
 262       /*
 263        * TODO: eliminate this restriction
 264        */
 265       if (format == PIPE_FORMAT_Z32_FLOAT)
 266          return FALSE;
 267    }
 268
 269    /*
 270     * All other operations (sampling, transfer, etc).
 271     */
 272
 273    if (format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
 274       return util_format_s3tc_enabled;
 275    }
 276
 277    /*
 278     * Everything else should be supported by u_format.
 279     */
 280    return TRUE;
 281 }
 282
 283
 284 static void
 285 softpipe_destroy_screen( struct pipe_screen *screen )
 286 {
 287    struct softpipe_screen *sp_screen = softpipe_screen(screen);
 288    struct sw_winsys *winsys = sp_screen->winsys;
 289
 290    if(winsys->destroy)
 291       winsys->destroy(winsys);
 292
 293    FREE(screen);
 294 }
 295
 296
 297 /* This is often overriden by the co-state tracker.
 298  */
 299 static void
 300 softpipe_flush_frontbuffer(struct pipe_screen *_screen,
 301                            struct pipe_resource *resource,
 302                            unsigned level, unsigned layer,
 303                            void *context_private)
 304 {
 305    struct softpipe_screen *screen = softpipe_screen(_screen);
 306    struct sw_winsys *winsys = screen->winsys;
 307    struct softpipe_resource *texture = softpipe_resource(resource);
 308
 309    assert(texture->dt);
 310    if (texture->dt)
 311       winsys->displaytarget_display(winsys, texture->dt, context_private);
 312 }
 313
 314 /**
 315  * Create a new pipe_screen object
 316  * Note: we're not presently subclassing pipe_screen (no softpipe_screen).
 317  */
 318 struct pipe_screen *
 319 softpipe_create_screen(struct sw_winsys *winsys)
 320 {
 321    struct softpipe_screen *screen = CALLOC_STRUCT(softpipe_screen);
 322
 323    if (!screen)
 324       return NULL;
 325
 326    screen->winsys = winsys;
 327
 328    screen->base.winsys = NULL;
 329    screen->base.destroy = softpipe_destroy_screen;
 330
 331    screen->base.get_name = softpipe_get_name;
 332    screen->base.get_vendor = softpipe_get_vendor;
 333    screen->base.get_param = softpipe_get_param;
 334    screen->base.get_shader_param = softpipe_get_shader_param;
 335    screen->base.get_paramf = softpipe_get_paramf;
 336    screen->base.get_video_param = softpipe_get_video_param;
 337    screen->base.is_format_supported = softpipe_is_format_supported;
 338    screen->base.is_video_format_supported = vl_video_buffer_is_format_supported;
 339    screen->base.context_create = softpipe_create_context;
 340    screen->base.flush_frontbuffer = softpipe_flush_frontbuffer;
 341
 342    util_format_s3tc_init();
 343
 344    softpipe_init_screen_texture_funcs(&screen->base);
 345    softpipe_init_screen_fence_funcs(&screen->base);
 346
 347    return &screen->base;
 348 }