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
  35 #include "state_tracker/sw_winsys.h"
  36 #include "tgsi/tgsi_exec.h"
  37
  38 #include "sp_texture.h"
  39 #include "sp_screen.h"
  40 #include "sp_context.h"
  41 #include "sp_fence.h"
  42 #include "sp_public.h"
  43
  44
  45 static const char *
  46 softpipe_get_vendor(struct pipe_screen *screen)
  47 {
  48    return "VMware, Inc.";
  49 }
  50
  51
  52 static const char *
  53 softpipe_get_name(struct pipe_screen *screen)
  54 {
  55    return "softpipe";
  56 }
  57
  58
  59 static int
  60 softpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
  61 {
  62    switch (param) {
  63    case PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS:
  64       return PIPE_MAX_SAMPLERS;
  65    case PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS:
  66       return PIPE_MAX_VERTEX_SAMPLERS;
  67    case PIPE_CAP_MAX_COMBINED_SAMPLERS:
  68       return PIPE_MAX_SAMPLERS + PIPE_MAX_VERTEX_SAMPLERS;
  69    case PIPE_CAP_NPOT_TEXTURES:
  70       return 1;
  71    case PIPE_CAP_TWO_SIDED_STENCIL:
  72       return 1;
  73    case PIPE_CAP_GLSL:
  74       return 1;
  75    case PIPE_CAP_SM3:
  76       return 1;
  77    case PIPE_CAP_ANISOTROPIC_FILTER:
  78       return 0;
  79    case PIPE_CAP_POINT_SPRITE:
  80       return 1;
  81    case PIPE_CAP_MAX_RENDER_TARGETS:
  82       return PIPE_MAX_COLOR_BUFS;
  83    case PIPE_CAP_OCCLUSION_QUERY:
  84       return 1;
  85    case PIPE_CAP_TIMER_QUERY:
  86       return 1;
  87    case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
  88       return 1;
  89    case PIPE_CAP_TEXTURE_MIRROR_REPEAT:
  90       return 1;
  91    case PIPE_CAP_TEXTURE_SHADOW_MAP:
  92       return 1;
  93    case PIPE_CAP_TEXTURE_SWIZZLE:
  94       return 1;
  95    case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
  96       return SP_MAX_TEXTURE_2D_LEVELS;
  97    case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
  98       return SP_MAX_TEXTURE_3D_LEVELS;
  99    case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 100       return SP_MAX_TEXTURE_2D_LEVELS;
 101    case PIPE_CAP_TGSI_CONT_SUPPORTED:
 102       return 1;
 103    case PIPE_CAP_BLEND_EQUATION_SEPARATE:
 104       return 1;
 105    case PIPE_CAP_MAX_CONST_BUFFERS:
 106       return PIPE_MAX_CONSTANT_BUFFERS;
 107    case PIPE_CAP_MAX_CONST_BUFFER_SIZE:
 108       return 4096 * 4 * sizeof(float);
 109    case PIPE_CAP_INDEP_BLEND_ENABLE:
 110       return 1;
 111    case PIPE_CAP_INDEP_BLEND_FUNC:
 112       return 1;
 113    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
 114    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
 115    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
 116    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
 117       return 1;
 118    case PIPE_CAP_STREAM_OUTPUT:
 119       return 1;
 120
 121    case PIPE_CAP_MAX_VS_INSTRUCTIONS:
 122    case PIPE_CAP_MAX_FS_INSTRUCTIONS:
 123    case PIPE_CAP_MAX_VS_ALU_INSTRUCTIONS:
 124    case PIPE_CAP_MAX_FS_ALU_INSTRUCTIONS:
 125    case PIPE_CAP_MAX_VS_TEX_INSTRUCTIONS:
 126    case PIPE_CAP_MAX_FS_TEX_INSTRUCTIONS:
 127    case PIPE_CAP_MAX_VS_TEX_INDIRECTIONS:
 128    case PIPE_CAP_MAX_FS_TEX_INDIRECTIONS:
 129       /* There is no limit in number of instructions beyond available memory */
 130       return 32768;
 131    case PIPE_CAP_MAX_VS_CONTROL_FLOW_DEPTH:
 132    case PIPE_CAP_MAX_FS_CONTROL_FLOW_DEPTH:
 133       return TGSI_EXEC_MAX_NESTING;
 134    case PIPE_CAP_MAX_VS_INPUTS:
 135    case PIPE_CAP_MAX_FS_INPUTS:
 136       return TGSI_EXEC_MAX_INPUT_ATTRIBS;
 137    case PIPE_CAP_MAX_FS_CONSTS:
 138    case PIPE_CAP_MAX_VS_CONSTS:
 139       return TGSI_EXEC_MAX_CONST_BUFFER;
 140    case PIPE_CAP_MAX_VS_TEMPS:
 141    case PIPE_CAP_MAX_FS_TEMPS:
 142       return TGSI_EXEC_NUM_TEMPS;
 143    case PIPE_CAP_MAX_VS_ADDRS:
 144    case PIPE_CAP_MAX_FS_ADDRS:
 145       return TGSI_EXEC_NUM_ADDRS;
 146    case PIPE_CAP_MAX_VS_PREDS:
 147    case PIPE_CAP_MAX_FS_PREDS:
 148       return TGSI_EXEC_NUM_PREDS;
 149
 150    case PIPE_CAP_DEPTHSTENCIL_CLEAR_SEPARATE:
 151       return 0;
 152    default:
 153       return 0;
 154    }
 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; /* not actually signficant at this time */
 172    case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
 173       return 16.0; /* arbitrary */
 174    default:
 175       return 0;
 176    }
 177 }
 178
 179
 180 /**
 181  * Query format support for creating a texture, drawing surface, etc.
 182  * \param format  the format to test
 183  * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
 184  */
 185 static boolean
 186 softpipe_is_format_supported( struct pipe_screen *screen,
 187                               enum pipe_format format,
 188                               enum pipe_texture_target target,
 189                               unsigned sample_count,
 190                               unsigned bind,
 191                               unsigned geom_flags )
 192 {
 193    struct sw_winsys *winsys = softpipe_screen(screen)->winsys;
 194    const struct util_format_description *format_desc;
 195
 196    assert(target == PIPE_BUFFER ||
 197           target == PIPE_TEXTURE_1D ||
 198           target == PIPE_TEXTURE_2D ||
 199           target == PIPE_TEXTURE_3D ||
 200           target == PIPE_TEXTURE_CUBE);
 201
 202    format_desc = util_format_description(format);
 203    if (!format_desc)
 204       return FALSE;
 205
 206    if (sample_count > 1)
 207       return FALSE;
 208
 209    if (bind & (PIPE_BIND_DISPLAY_TARGET |
 210                PIPE_BIND_SCANOUT |
 211                PIPE_BIND_SHARED)) {
 212       if(!winsys->is_displaytarget_format_supported(winsys, bind, format))
 213          return FALSE;
 214    }
 215
 216    if (bind & PIPE_BIND_RENDER_TARGET) {
 217       if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS)
 218          return FALSE;
 219
 220       /*
 221        * Although possible, it is unnatural to render into compressed or YUV
 222        * surfaces. So disable these here to avoid going into weird paths
 223        * inside the state trackers.
 224        */
 225       if (format_desc->block.width != 1 ||
 226           format_desc->block.height != 1)
 227          return FALSE;
 228
 229       /*
 230        * TODO: Unfortunately we cannot render into anything more than 32 bits
 231        * because we encode color clear values into a 32bit word.
 232        */
 233       if (format_desc->block.bits > 32)
 234          return FALSE;
 235    }
 236
 237    if (bind & PIPE_BIND_DEPTH_STENCIL) {
 238       if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
 239          return FALSE;
 240
 241       /*
 242        * TODO: Unfortunately we cannot render into anything more than 32 bits
 243        * because we encode depth and stencil clear values into a 32bit word.
 244        */
 245       if (format_desc->block.bits > 32)
 246          return FALSE;
 247
 248       /*
 249        * TODO: eliminate this restriction
 250        */
 251       if (format == PIPE_FORMAT_Z32_FLOAT)
 252          return FALSE;
 253    }
 254
 255    /*
 256     * All other operations (sampling, transfer, etc).
 257     */
 258
 259    if (format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
 260       return util_format_s3tc_enabled;
 261    }
 262
 263    /*
 264     * Everything else should be supported by u_format.
 265     */
 266    return TRUE;
 267 }
 268
 269
 270 static void
 271 softpipe_destroy_screen( struct pipe_screen *screen )
 272 {
 273    struct softpipe_screen *sp_screen = softpipe_screen(screen);
 274    struct sw_winsys *winsys = sp_screen->winsys;
 275
 276    if(winsys->destroy)
 277       winsys->destroy(winsys);
 278
 279    FREE(screen);
 280 }
 281
 282
 283 /* This is often overriden by the co-state tracker.
 284  */
 285 static void
 286 softpipe_flush_frontbuffer(struct pipe_screen *_screen,
 287                            struct pipe_surface *surface,
 288                            void *context_private)
 289 {
 290    struct softpipe_screen *screen = softpipe_screen(_screen);
 291    struct sw_winsys *winsys = screen->winsys;
 292    struct softpipe_resource *texture = softpipe_resource(surface->texture);
 293
 294    assert(texture->dt);
 295    if (texture->dt)
 296       winsys->displaytarget_display(winsys, texture->dt, context_private);
 297 }
 298
 299 /**
 300  * Create a new pipe_screen object
 301  * Note: we're not presently subclassing pipe_screen (no softpipe_screen).
 302  */
 303 struct pipe_screen *
 304 softpipe_create_screen(struct sw_winsys *winsys)
 305 {
 306    struct softpipe_screen *screen = CALLOC_STRUCT(softpipe_screen);
 307
 308    if (!screen)
 309       return NULL;
 310
 311    screen->winsys = winsys;
 312
 313    screen->base.winsys = NULL;
 314    screen->base.destroy = softpipe_destroy_screen;
 315
 316    screen->base.get_name = softpipe_get_name;
 317    screen->base.get_vendor = softpipe_get_vendor;
 318    screen->base.get_param = softpipe_get_param;
 319    screen->base.get_paramf = softpipe_get_paramf;
 320    screen->base.is_format_supported = softpipe_is_format_supported;
 321    screen->base.context_create = softpipe_create_context;
 322    screen->base.flush_frontbuffer = softpipe_flush_frontbuffer;
 323
 324    util_format_s3tc_init();
 325
 326    softpipe_init_screen_texture_funcs(&screen->base);
 327    softpipe_init_screen_fence_funcs(&screen->base);
 328
 329    return &screen->base;
 330 }