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 DEBUG_GET_ONCE_BOOL_OPTION(use_llvm, "SOFTPIPE_USE_LLVM", FALSE)
  49
  50 static const char *
  51 softpipe_get_vendor(struct pipe_screen *screen)
  52 {
  53    return "VMware, Inc.";
  54 }
  55
  56
  57 static const char *
  58 softpipe_get_name(struct pipe_screen *screen)
  59 {
  60    return "softpipe";
  61 }
  62
  63
  64 static int
  65 softpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
  66 {
  67    switch (param) {
  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_SM3:
  75       return 1;
  76    case PIPE_CAP_ANISOTROPIC_FILTER:
  77       return 1;
  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_TIMER_QUERY:
  85       return 1;
  86    case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
  87       return 1;
  88    case PIPE_CAP_TEXTURE_SHADOW_MAP:
  89       return 1;
  90    case PIPE_CAP_TEXTURE_SWIZZLE:
  91       return 1;
  92    case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
  93       return SP_MAX_TEXTURE_2D_LEVELS;
  94    case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
  95       return SP_MAX_TEXTURE_3D_LEVELS;
  96    case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
  97       return SP_MAX_TEXTURE_2D_LEVELS;
  98    case PIPE_CAP_BLEND_EQUATION_SEPARATE:
  99       return 1;
 100    case PIPE_CAP_INDEP_BLEND_ENABLE:
 101       return 1;
 102    case PIPE_CAP_INDEP_BLEND_FUNC:
 103       return 1;
 104    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
 105    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
 106    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
 107    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
 108       return 1;
 109    case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
 110       return PIPE_MAX_SO_BUFFERS;
 111    case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS:
 112    case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:
 113       return 16*4;
 114    case PIPE_CAP_PRIMITIVE_RESTART:
 115       return 1;
 116    case PIPE_CAP_DEPTHSTENCIL_CLEAR_SEPARATE:
 117       return 0;
 118    case PIPE_CAP_SHADER_STENCIL_EXPORT:
 119       return 1;
 120    case PIPE_CAP_TGSI_INSTANCEID:
 121    case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
 122       return 1;
 123    case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
 124       return 256; /* for GL3 */
 125    case PIPE_CAP_MIN_TEXEL_OFFSET:
 126       return -8;
 127    case PIPE_CAP_MAX_TEXEL_OFFSET:
 128       return 7;
 129    case PIPE_CAP_CONDITIONAL_RENDER:
 130       return 1;
 131    case PIPE_CAP_FRAGMENT_COLOR_CLAMP_CONTROL:
 132       return 1;
 133    default:
 134       return 0;
 135    }
 136 }
 137
 138 static int
 139 softpipe_get_shader_param(struct pipe_screen *screen, unsigned shader, enum pipe_shader_cap param)
 140 {
 141 #ifdef HAVE_LLVM
 142    struct softpipe_screen *sp_screen = softpipe_screen(screen);
 143 #endif
 144    switch(shader)
 145    {
 146    case PIPE_SHADER_FRAGMENT:
 147       return tgsi_exec_get_shader_param(param);
 148    case PIPE_SHADER_VERTEX:
 149    case PIPE_SHADER_GEOMETRY:
 150       switch (param) {
 151       case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 152 #ifdef HAVE_LLVM
 153          if (sp_screen->use_llvm)
 154             /* Softpipe doesn't yet know how to tell draw/llvm about textures */
 155             return 0;
 156 #endif
 157          return PIPE_MAX_VERTEX_SAMPLERS;
 158       case PIPE_SHADER_CAP_INTEGERS:
 159 #ifdef HAVE_LLVM /* gallivm doesn't support integers yet */
 160          if (sp_screen->use_llvm)
 161             return 0;
 162 #endif
 163          /* fallthrough */
 164       default:
 165          return draw_get_shader_param(shader, param);
 166       }
 167    default:
 168       return 0;
 169    }
 170 }
 171
 172 static float
 173 softpipe_get_paramf(struct pipe_screen *screen, enum pipe_capf param)
 174 {
 175    switch (param) {
 176    case PIPE_CAPF_MAX_LINE_WIDTH:
 177       /* fall-through */
 178    case PIPE_CAPF_MAX_LINE_WIDTH_AA:
 179       return 255.0; /* arbitrary */
 180    case PIPE_CAPF_MAX_POINT_WIDTH:
 181       /* fall-through */
 182    case PIPE_CAPF_MAX_POINT_WIDTH_AA:
 183       return 255.0; /* arbitrary */
 184    case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
 185       return 16.0;
 186    case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
 187       return 16.0; /* arbitrary */
 188    default:
 189       return 0;
 190    }
 191 }
 192
 193 static int
 194 softpipe_get_video_param(struct pipe_screen *screen,
 195                          enum pipe_video_profile profile,
 196                          enum pipe_video_cap param)
 197 {
 198    switch (param) {
 199    case PIPE_VIDEO_CAP_SUPPORTED:
 200        return vl_profile_supported(screen, profile);
 201    case PIPE_VIDEO_CAP_NPOT_TEXTURES:
 202       return 0;
 203    case PIPE_VIDEO_CAP_MAX_WIDTH:
 204    case PIPE_VIDEO_CAP_MAX_HEIGHT:
 205       return vl_video_buffer_max_size(screen);
 206    case PIPE_VIDEO_CAP_PREFERED_FORMAT:
 207       return PIPE_FORMAT_NV12;
 208    default:
 209       return 0;
 210    }
 211 }
 212
 213 /**
 214  * Query format support for creating a texture, drawing surface, etc.
 215  * \param format  the format to test
 216  * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
 217  */
 218 static boolean
 219 softpipe_is_format_supported( struct pipe_screen *screen,
 220                               enum pipe_format format,
 221                               enum pipe_texture_target target,
 222                               unsigned sample_count,
 223                               unsigned bind)
 224 {
 225    struct sw_winsys *winsys = softpipe_screen(screen)->winsys;
 226    const struct util_format_description *format_desc;
 227
 228    assert(target == PIPE_BUFFER ||
 229           target == PIPE_TEXTURE_1D ||
 230           target == PIPE_TEXTURE_1D_ARRAY ||
 231           target == PIPE_TEXTURE_2D ||
 232           target == PIPE_TEXTURE_2D_ARRAY ||
 233           target == PIPE_TEXTURE_RECT ||
 234           target == PIPE_TEXTURE_3D ||
 235           target == PIPE_TEXTURE_CUBE);
 236
 237    format_desc = util_format_description(format);
 238    if (!format_desc)
 239       return FALSE;
 240
 241    if (sample_count > 1)
 242       return FALSE;
 243
 244    if (bind & (PIPE_BIND_DISPLAY_TARGET |
 245                PIPE_BIND_SCANOUT |
 246                PIPE_BIND_SHARED)) {
 247       if(!winsys->is_displaytarget_format_supported(winsys, bind, format))
 248          return FALSE;
 249    }
 250
 251    if (bind & PIPE_BIND_RENDER_TARGET) {
 252       if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS)
 253          return FALSE;
 254
 255       /*
 256        * Although possible, it is unnatural to render into compressed or YUV
 257        * surfaces. So disable these here to avoid going into weird paths
 258        * inside the state trackers.
 259        */
 260       if (format_desc->block.width != 1 ||
 261           format_desc->block.height != 1)
 262          return FALSE;
 263    }
 264
 265    if (bind & PIPE_BIND_DEPTH_STENCIL) {
 266       if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
 267          return FALSE;
 268    }
 269
 270    /*
 271     * All other operations (sampling, transfer, etc).
 272     */
 273
 274    if (format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
 275       return util_format_s3tc_enabled;
 276    }
 277
 278    /*
 279     * Everything else should be supported by u_format.
 280     */
 281    return TRUE;
 282 }
 283
 284
 285 static void
 286 softpipe_destroy_screen( struct pipe_screen *screen )
 287 {
 288    struct softpipe_screen *sp_screen = softpipe_screen(screen);
 289    struct sw_winsys *winsys = sp_screen->winsys;
 290
 291    if(winsys->destroy)
 292       winsys->destroy(winsys);
 293
 294    FREE(screen);
 295 }
 296
 297
 298 /* This is often overriden by the co-state tracker.
 299  */
 300 static void
 301 softpipe_flush_frontbuffer(struct pipe_screen *_screen,
 302                            struct pipe_resource *resource,
 303                            unsigned level, unsigned layer,
 304                            void *context_private)
 305 {
 306    struct softpipe_screen *screen = softpipe_screen(_screen);
 307    struct sw_winsys *winsys = screen->winsys;
 308    struct softpipe_resource *texture = softpipe_resource(resource);
 309
 310    assert(texture->dt);
 311    if (texture->dt)
 312       winsys->displaytarget_display(winsys, texture->dt, context_private);
 313 }
 314
 315 /**
 316  * Create a new pipe_screen object
 317  * Note: we're not presently subclassing pipe_screen (no softpipe_screen).
 318  */
 319 struct pipe_screen *
 320 softpipe_create_screen(struct sw_winsys *winsys)
 321 {
 322    struct softpipe_screen *screen = CALLOC_STRUCT(softpipe_screen);
 323
 324    if (!screen)
 325       return NULL;
 326
 327    screen->winsys = winsys;
 328
 329    screen->base.winsys = NULL;
 330    screen->base.destroy = softpipe_destroy_screen;
 331
 332    screen->base.get_name = softpipe_get_name;
 333    screen->base.get_vendor = softpipe_get_vendor;
 334    screen->base.get_param = softpipe_get_param;
 335    screen->base.get_shader_param = softpipe_get_shader_param;
 336    screen->base.get_paramf = softpipe_get_paramf;
 337    screen->base.get_video_param = softpipe_get_video_param;
 338    screen->base.is_format_supported = softpipe_is_format_supported;
 339    screen->base.is_video_format_supported = vl_video_buffer_is_format_supported;
 340    screen->base.context_create = softpipe_create_context;
 341    screen->base.flush_frontbuffer = softpipe_flush_frontbuffer;
 342
 343    screen->use_llvm = debug_get_option_use_llvm();
 344
 345    util_format_s3tc_init();
 346
 347    softpipe_init_screen_texture_funcs(&screen->base);
 348    softpipe_init_screen_fence_funcs(&screen->base);
 349
 350    return &screen->base;
 351 }