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_context.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_ARRAY_TEXTURES:
 133       return 1;
 134    default:
 135       return 0;
 136    }
 137 }
 138
 139 static int
 140 softpipe_get_shader_param(struct pipe_screen *screen, unsigned shader, enum pipe_shader_cap param)
 141 {
 142    switch(shader)
 143    {
 144    case PIPE_SHADER_FRAGMENT:
 145       return tgsi_exec_get_shader_param(param);
 146    case PIPE_SHADER_VERTEX:
 147    case PIPE_SHADER_GEOMETRY:
 148       return draw_get_shader_param(shader, param);
 149    default:
 150       return 0;
 151    }
 152 }
 153
 154 static float
 155 softpipe_get_paramf(struct pipe_screen *screen, enum pipe_cap param)
 156 {
 157    switch (param) {
 158    case PIPE_CAP_MAX_LINE_WIDTH:
 159       /* fall-through */
 160    case PIPE_CAP_MAX_LINE_WIDTH_AA:
 161       return 255.0; /* arbitrary */
 162    case PIPE_CAP_MAX_POINT_WIDTH:
 163       /* fall-through */
 164    case PIPE_CAP_MAX_POINT_WIDTH_AA:
 165       return 255.0; /* arbitrary */
 166    case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
 167       return 16.0;
 168    case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
 169       return 16.0; /* arbitrary */
 170    default:
 171       return 0;
 172    }
 173 }
 174
 175 static int
 176 softpipe_get_video_param(struct pipe_screen *screen,
 177                          enum pipe_video_profile profile,
 178                          enum pipe_video_cap param)
 179 {
 180    switch (param) {
 181    case PIPE_VIDEO_CAP_NPOT_TEXTURES:
 182       return 0;
 183    default:
 184       return 0;
 185    }
 186 }
 187
 188 /**
 189  * Query format support for creating a texture, drawing surface, etc.
 190  * \param format  the format to test
 191  * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
 192  */
 193 static boolean
 194 softpipe_is_format_supported( struct pipe_screen *screen,
 195                               enum pipe_format format,
 196                               enum pipe_texture_target target,
 197                               unsigned sample_count,
 198                               unsigned bind)
 199 {
 200    struct sw_winsys *winsys = softpipe_screen(screen)->winsys;
 201    const struct util_format_description *format_desc;
 202
 203    assert(target == PIPE_BUFFER ||
 204           target == PIPE_TEXTURE_1D ||
 205           target == PIPE_TEXTURE_1D_ARRAY ||
 206           target == PIPE_TEXTURE_2D ||
 207           target == PIPE_TEXTURE_2D_ARRAY ||
 208           target == PIPE_TEXTURE_RECT ||
 209           target == PIPE_TEXTURE_3D ||
 210           target == PIPE_TEXTURE_CUBE);
 211
 212    format_desc = util_format_description(format);
 213    if (!format_desc)
 214       return FALSE;
 215
 216    if (sample_count > 1)
 217       return FALSE;
 218
 219    if (bind & (PIPE_BIND_DISPLAY_TARGET |
 220                PIPE_BIND_SCANOUT |
 221                PIPE_BIND_SHARED)) {
 222       if(!winsys->is_displaytarget_format_supported(winsys, bind, format))
 223          return FALSE;
 224    }
 225
 226    if (bind & PIPE_BIND_RENDER_TARGET) {
 227       if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS)
 228          return FALSE;
 229
 230       /*
 231        * Although possible, it is unnatural to render into compressed or YUV
 232        * surfaces. So disable these here to avoid going into weird paths
 233        * inside the state trackers.
 234        */
 235       if (format_desc->block.width != 1 ||
 236           format_desc->block.height != 1)
 237          return FALSE;
 238    }
 239
 240    if (bind & PIPE_BIND_DEPTH_STENCIL) {
 241       if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
 242          return FALSE;
 243
 244       /*
 245        * TODO: Unfortunately we cannot render into anything more than 32 bits
 246        * because we encode depth and stencil clear values into a 32bit word.
 247        */
 248       if (format_desc->block.bits > 32)
 249          return FALSE;
 250
 251       /*
 252        * TODO: eliminate this restriction
 253        */
 254       if (format == PIPE_FORMAT_Z32_FLOAT)
 255          return FALSE;
 256    }
 257
 258    /*
 259     * All other operations (sampling, transfer, etc).
 260     */
 261
 262    if (format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
 263       return util_format_s3tc_enabled;
 264    }
 265
 266    /*
 267     * Everything else should be supported by u_format.
 268     */
 269    return TRUE;
 270 }
 271
 272
 273 static void
 274 softpipe_destroy_screen( struct pipe_screen *screen )
 275 {
 276    struct softpipe_screen *sp_screen = softpipe_screen(screen);
 277    struct sw_winsys *winsys = sp_screen->winsys;
 278
 279    if(winsys->destroy)
 280       winsys->destroy(winsys);
 281
 282    FREE(screen);
 283 }
 284
 285
 286 /* This is often overriden by the co-state tracker.
 287  */
 288 static void
 289 softpipe_flush_frontbuffer(struct pipe_screen *_screen,
 290                            struct pipe_resource *resource,
 291                            unsigned level, unsigned layer,
 292                            void *context_private)
 293 {
 294    struct softpipe_screen *screen = softpipe_screen(_screen);
 295    struct sw_winsys *winsys = screen->winsys;
 296    struct softpipe_resource *texture = softpipe_resource(resource);
 297
 298    assert(texture->dt);
 299    if (texture->dt)
 300       winsys->displaytarget_display(winsys, texture->dt, context_private);
 301 }
 302
 303 static struct pipe_video_context *
 304 sp_video_create(struct pipe_screen *screen, struct pipe_context *context, void *priv)
 305 {
 306    assert(screen);
 307
 308    return vl_create_context(context);
 309 }
 310
 311 /**
 312  * Create a new pipe_screen object
 313  * Note: we're not presently subclassing pipe_screen (no softpipe_screen).
 314  */
 315 struct pipe_screen *
 316 softpipe_create_screen(struct sw_winsys *winsys)
 317 {
 318    struct softpipe_screen *screen = CALLOC_STRUCT(softpipe_screen);
 319
 320    if (!screen)
 321       return NULL;
 322
 323    screen->winsys = winsys;
 324
 325    screen->base.winsys = NULL;
 326    screen->base.destroy = softpipe_destroy_screen;
 327
 328    screen->base.get_name = softpipe_get_name;
 329    screen->base.get_vendor = softpipe_get_vendor;
 330    screen->base.get_param = softpipe_get_param;
 331    screen->base.get_shader_param = softpipe_get_shader_param;
 332    screen->base.get_paramf = softpipe_get_paramf;
 333    screen->base.get_video_param = softpipe_get_video_param;
 334    screen->base.is_format_supported = softpipe_is_format_supported;
 335    screen->base.is_video_format_supported = vl_video_buffer_is_format_supported;
 336    screen->base.context_create = softpipe_create_context;
 337    screen->base.flush_frontbuffer = softpipe_flush_frontbuffer;
 338    screen->base.video_context_create = sp_video_create;
 339
 340    util_format_s3tc_init();
 341
 342    softpipe_init_screen_texture_funcs(&screen->base);
 343    softpipe_init_screen_fence_funcs(&screen->base);
 344
 345    return &screen->base;
 346 }