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