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_mpeg12_context.h"
  37
  38 #include "state_tracker/sw_winsys.h"
  39 #include "tgsi/tgsi_exec.h"
  40
  41 #include "sp_texture.h"
  42 #include "sp_screen.h"
  43 #include "sp_context.h"
  44 #include "sp_fence.h"
  45 #include "sp_public.h"
  46
  47
  48 static const char *
  49 softpipe_get_vendor(struct pipe_screen *screen)
  50 {
  51    return "VMware, Inc.";
  52 }
  53
  54
  55 static const char *
  56 softpipe_get_name(struct pipe_screen *screen)
  57 {
  58    return "softpipe";
  59 }
  60
  61
  62 static int
  63 softpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
  64 {
  65    switch (param) {
  66    case PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS:
  67       return PIPE_MAX_SAMPLERS;
  68    case PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS:
  69 #ifdef HAVE_LLVM
  70       /* Softpipe doesn't yet know how to tell draw/llvm about textures */
  71       return 0;
  72 #else
  73       return PIPE_MAX_VERTEX_SAMPLERS;
  74 #endif
  75    case PIPE_CAP_MAX_COMBINED_SAMPLERS:
  76       return PIPE_MAX_SAMPLERS + PIPE_MAX_VERTEX_SAMPLERS;
  77    case PIPE_CAP_NPOT_TEXTURES:
  78       return 1;
  79    case PIPE_CAP_TWO_SIDED_STENCIL:
  80       return 1;
  81    case PIPE_CAP_GLSL:
  82       return 1;
  83    case PIPE_CAP_SM3:
  84       return 1;
  85    case PIPE_CAP_ANISOTROPIC_FILTER:
  86       return 0;
  87    case PIPE_CAP_POINT_SPRITE:
  88       return 1;
  89    case PIPE_CAP_MAX_RENDER_TARGETS:
  90       return PIPE_MAX_COLOR_BUFS;
  91    case PIPE_CAP_OCCLUSION_QUERY:
  92       return 1;
  93    case PIPE_CAP_TIMER_QUERY:
  94       return 1;
  95    case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
  96       return 1;
  97    case PIPE_CAP_TEXTURE_MIRROR_REPEAT:
  98       return 1;
  99    case PIPE_CAP_TEXTURE_SHADOW_MAP:
 100       return 1;
 101    case PIPE_CAP_TEXTURE_SWIZZLE:
 102       return 1;
 103    case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
 104       return SP_MAX_TEXTURE_2D_LEVELS;
 105    case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
 106       return SP_MAX_TEXTURE_3D_LEVELS;
 107    case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 108       return SP_MAX_TEXTURE_2D_LEVELS;
 109    case PIPE_CAP_BLEND_EQUATION_SEPARATE:
 110       return 1;
 111    case PIPE_CAP_INDEP_BLEND_ENABLE:
 112       return 1;
 113    case PIPE_CAP_INDEP_BLEND_FUNC:
 114       return 1;
 115    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
 116    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
 117    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
 118    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
 119       return 1;
 120    case PIPE_CAP_STREAM_OUTPUT:
 121       return 1;
 122    case PIPE_CAP_PRIMITIVE_RESTART:
 123       return 1;
 124    case PIPE_CAP_DEPTHSTENCIL_CLEAR_SEPARATE:
 125       return 0;
 126    case PIPE_CAP_SHADER_STENCIL_EXPORT:
 127       return 1;
 128    case PIPE_CAP_TGSI_INSTANCEID:
 129    case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
 130       return 1;
 131    case PIPE_CAP_ARRAY_TEXTURES:
 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    switch(shader)
 142    {
 143    case PIPE_SHADER_FRAGMENT:
 144       return tgsi_exec_get_shader_param(param);
 145    case PIPE_SHADER_VERTEX:
 146    case PIPE_SHADER_GEOMETRY:
 147       return draw_get_shader_param(shader, param);
 148    default:
 149       return 0;
 150    }
 151 }
 152
 153 static float
 154 softpipe_get_paramf(struct pipe_screen *screen, enum pipe_cap param)
 155 {
 156    switch (param) {
 157    case PIPE_CAP_MAX_LINE_WIDTH:
 158       /* fall-through */
 159    case PIPE_CAP_MAX_LINE_WIDTH_AA:
 160       return 255.0; /* arbitrary */
 161    case PIPE_CAP_MAX_POINT_WIDTH:
 162       /* fall-through */
 163    case PIPE_CAP_MAX_POINT_WIDTH_AA:
 164       return 255.0; /* arbitrary */
 165    case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
 166       return 16.0; /* not actually signficant at this time */
 167    case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
 168       return 16.0; /* arbitrary */
 169    default:
 170       return 0;
 171    }
 172 }
 173
 174
 175 /**
 176  * Query format support for creating a texture, drawing surface, etc.
 177  * \param format  the format to test
 178  * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
 179  */
 180 static boolean
 181 softpipe_is_format_supported( struct pipe_screen *screen,
 182                               enum pipe_format format,
 183                               enum pipe_texture_target target,
 184                               unsigned sample_count,
 185                               unsigned bind)
 186 {
 187    struct sw_winsys *winsys = softpipe_screen(screen)->winsys;
 188    const struct util_format_description *format_desc;
 189
 190    assert(target == PIPE_BUFFER ||
 191           target == PIPE_TEXTURE_1D ||
 192           target == PIPE_TEXTURE_1D_ARRAY ||
 193           target == PIPE_TEXTURE_2D ||
 194           target == PIPE_TEXTURE_2D_ARRAY ||
 195           target == PIPE_TEXTURE_RECT ||
 196           target == PIPE_TEXTURE_3D ||
 197           target == PIPE_TEXTURE_CUBE);
 198
 199    format_desc = util_format_description(format);
 200    if (!format_desc)
 201       return FALSE;
 202
 203    if (sample_count > 1)
 204       return FALSE;
 205
 206    if (bind & (PIPE_BIND_DISPLAY_TARGET |
 207                PIPE_BIND_SCANOUT |
 208                PIPE_BIND_SHARED)) {
 209       if(!winsys->is_displaytarget_format_supported(winsys, bind, format))
 210          return FALSE;
 211    }
 212
 213    if (bind & PIPE_BIND_RENDER_TARGET) {
 214       if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS)
 215          return FALSE;
 216
 217       /*
 218        * Although possible, it is unnatural to render into compressed or YUV
 219        * surfaces. So disable these here to avoid going into weird paths
 220        * inside the state trackers.
 221        */
 222       if (format_desc->block.width != 1 ||
 223           format_desc->block.height != 1)
 224          return FALSE;
 225    }
 226
 227    if (bind & PIPE_BIND_DEPTH_STENCIL) {
 228       if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
 229          return FALSE;
 230
 231       /*
 232        * TODO: Unfortunately we cannot render into anything more than 32 bits
 233        * because we encode depth and stencil clear values into a 32bit word.
 234        */
 235       if (format_desc->block.bits > 32)
 236          return FALSE;
 237
 238       /*
 239        * TODO: eliminate this restriction
 240        */
 241       if (format == PIPE_FORMAT_Z32_FLOAT)
 242          return FALSE;
 243    }
 244
 245    /*
 246     * All other operations (sampling, transfer, etc).
 247     */
 248
 249    if (format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
 250       return util_format_s3tc_enabled;
 251    }
 252
 253    /*
 254     * Everything else should be supported by u_format.
 255     */
 256    return TRUE;
 257 }
 258
 259
 260 static void
 261 softpipe_destroy_screen( struct pipe_screen *screen )
 262 {
 263    struct softpipe_screen *sp_screen = softpipe_screen(screen);
 264    struct sw_winsys *winsys = sp_screen->winsys;
 265
 266    if(winsys->destroy)
 267       winsys->destroy(winsys);
 268
 269    FREE(screen);
 270 }
 271
 272
 273 /* This is often overriden by the co-state tracker.
 274  */
 275 static void
 276 softpipe_flush_frontbuffer(struct pipe_screen *_screen,
 277                            struct pipe_resource *resource,
 278                            unsigned level, unsigned layer,
 279                            void *context_private)
 280 {
 281    struct softpipe_screen *screen = softpipe_screen(_screen);
 282    struct sw_winsys *winsys = screen->winsys;
 283    struct softpipe_resource *texture = softpipe_resource(resource);
 284
 285    assert(texture->dt);
 286    if (texture->dt)
 287       winsys->displaytarget_display(winsys, texture->dt, context_private);
 288 }
 289
 290 static struct pipe_video_context *
 291 sp_video_create(struct pipe_screen *screen, enum pipe_video_profile profile,
 292                 enum pipe_video_chroma_format chroma_format,
 293                 unsigned width, unsigned height, void *priv)
 294 {
 295    struct pipe_context *pipe;
 296
 297    assert(screen);
 298    assert(width && height);
 299
 300    pipe = screen->context_create(screen, NULL);
 301    if (!pipe)
 302       return NULL;
 303
 304    /* TODO: Use slice buffering for softpipe when implemented, no advantage to buffering an entire picture with softpipe */
 305    switch (u_reduce_video_profile(profile)) {
 306       case PIPE_VIDEO_CODEC_MPEG12:
 307          return vl_create_mpeg12_context(pipe, profile,
 308                                          chroma_format,
 309                                          width, height,
 310                                          true,
 311                                          PIPE_FORMAT_XYUV);
 312       default:
 313          return NULL;
 314    }
 315 }
 316
 317 /**
 318  * Create a new pipe_screen object
 319  * Note: we're not presently subclassing pipe_screen (no softpipe_screen).
 320  */
 321 struct pipe_screen *
 322 softpipe_create_screen(struct sw_winsys *winsys)
 323 {
 324    struct softpipe_screen *screen = CALLOC_STRUCT(softpipe_screen);
 325
 326    if (!screen)
 327       return NULL;
 328
 329    screen->winsys = winsys;
 330
 331    screen->base.winsys = NULL;
 332    screen->base.destroy = softpipe_destroy_screen;
 333
 334    screen->base.get_name = softpipe_get_name;
 335    screen->base.get_vendor = softpipe_get_vendor;
 336    screen->base.get_param = softpipe_get_param;
 337    screen->base.get_shader_param = softpipe_get_shader_param;
 338    screen->base.get_paramf = softpipe_get_paramf;
 339    screen->base.is_format_supported = softpipe_is_format_supported;
 340    screen->base.context_create = softpipe_create_context;
 341    screen->base.flush_frontbuffer = softpipe_flush_frontbuffer;
 342    screen->base.video_context_create = sp_video_create;
 343
 344    util_format_s3tc_init();
 345
 346    softpipe_init_screen_texture_funcs(&screen->base);
 347    softpipe_init_screen_fence_funcs(&screen->base);
 348
 349    return &screen->base;
 350 }