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_fence.h"
  43 #include "sp_public.h"
  44
  45
  46 static const char *
  47 softpipe_get_vendor(struct pipe_screen *screen)
  48 {
  49    return "VMware, Inc.";
  50 }
  51
  52
  53 static const char *
  54 softpipe_get_name(struct pipe_screen *screen)
  55 {
  56    return "softpipe";
  57 }
  58
  59
  60 static int
  61 softpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
  62 {
  63    switch (param) {
  64    case PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS:
  65       return PIPE_MAX_SAMPLERS;
  66    case PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS:
  67 #ifdef HAVE_LLVM
  68       /* Softpipe doesn't yet know how to tell draw/llvm about textures */
  69       return 0;
  70 #else
  71       return PIPE_MAX_VERTEX_SAMPLERS;
  72 #endif
  73    case PIPE_CAP_MAX_COMBINED_SAMPLERS:
  74       return PIPE_MAX_SAMPLERS + PIPE_MAX_VERTEX_SAMPLERS;
  75    case PIPE_CAP_NPOT_TEXTURES:
  76       return 1;
  77    case PIPE_CAP_TWO_SIDED_STENCIL:
  78       return 1;
  79    case PIPE_CAP_GLSL:
  80       return 1;
  81    case PIPE_CAP_SM3:
  82       return 1;
  83    case PIPE_CAP_ANISOTROPIC_FILTER:
  84       return 0;
  85    case PIPE_CAP_POINT_SPRITE:
  86       return 1;
  87    case PIPE_CAP_MAX_RENDER_TARGETS:
  88       return PIPE_MAX_COLOR_BUFS;
  89    case PIPE_CAP_OCCLUSION_QUERY:
  90       return 1;
  91    case PIPE_CAP_TIMER_QUERY:
  92       return 1;
  93    case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
  94       return 1;
  95    case PIPE_CAP_TEXTURE_MIRROR_REPEAT:
  96       return 1;
  97    case PIPE_CAP_TEXTURE_SHADOW_MAP:
  98       return 1;
  99    case PIPE_CAP_TEXTURE_SWIZZLE:
 100       return 1;
 101    case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
 102       return SP_MAX_TEXTURE_2D_LEVELS;
 103    case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
 104       return SP_MAX_TEXTURE_3D_LEVELS;
 105    case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 106       return SP_MAX_TEXTURE_2D_LEVELS;
 107    case PIPE_CAP_BLEND_EQUATION_SEPARATE:
 108       return 1;
 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    case PIPE_CAP_PRIMITIVE_RESTART:
 121       return 1;
 122    case PIPE_CAP_DEPTHSTENCIL_CLEAR_SEPARATE:
 123       return 0;
 124    case PIPE_CAP_SHADER_STENCIL_EXPORT:
 125       return 1;
 126    case PIPE_CAP_TGSI_INSTANCEID:
 127    case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
 128       return 1;
 129    case PIPE_CAP_ARRAY_TEXTURES:
 130       return 1;
 131    default:
 132       return 0;
 133    }
 134 }
 135
 136 static int
 137 softpipe_get_shader_param(struct pipe_screen *screen, unsigned shader, enum pipe_shader_cap param)
 138 {
 139    switch(shader)
 140    {
 141    case PIPE_SHADER_FRAGMENT:
 142       return tgsi_exec_get_shader_param(param);
 143    case PIPE_SHADER_VERTEX:
 144    case PIPE_SHADER_GEOMETRY:
 145       return draw_get_shader_param(shader, param);
 146    default:
 147       return 0;
 148    }
 149 }
 150
 151 static float
 152 softpipe_get_paramf(struct pipe_screen *screen, enum pipe_cap param)
 153 {
 154    switch (param) {
 155    case PIPE_CAP_MAX_LINE_WIDTH:
 156       /* fall-through */
 157    case PIPE_CAP_MAX_LINE_WIDTH_AA:
 158       return 255.0; /* arbitrary */
 159    case PIPE_CAP_MAX_POINT_WIDTH:
 160       /* fall-through */
 161    case PIPE_CAP_MAX_POINT_WIDTH_AA:
 162       return 255.0; /* arbitrary */
 163    case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
 164       return 16.0; /* not actually signficant at this time */
 165    case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
 166       return 16.0; /* arbitrary */
 167    default:
 168       return 0;
 169    }
 170 }
 171
 172
 173 /**
 174  * Query format support for creating a texture, drawing surface, etc.
 175  * \param format  the format to test
 176  * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
 177  */
 178 static boolean
 179 softpipe_is_format_supported( struct pipe_screen *screen,
 180                               enum pipe_format format,
 181                               enum pipe_texture_target target,
 182                               unsigned sample_count,
 183                               unsigned bind)
 184 {
 185    struct sw_winsys *winsys = softpipe_screen(screen)->winsys;
 186    const struct util_format_description *format_desc;
 187
 188    assert(target == PIPE_BUFFER ||
 189           target == PIPE_TEXTURE_1D ||
 190           target == PIPE_TEXTURE_1D_ARRAY ||
 191           target == PIPE_TEXTURE_2D ||
 192           target == PIPE_TEXTURE_2D_ARRAY ||
 193           target == PIPE_TEXTURE_RECT ||
 194           target == PIPE_TEXTURE_3D ||
 195           target == PIPE_TEXTURE_CUBE);
 196
 197    format_desc = util_format_description(format);
 198    if (!format_desc)
 199       return FALSE;
 200
 201    if (sample_count > 1)
 202       return FALSE;
 203
 204    if (bind & (PIPE_BIND_DISPLAY_TARGET |
 205                PIPE_BIND_SCANOUT |
 206                PIPE_BIND_SHARED)) {
 207       if(!winsys->is_displaytarget_format_supported(winsys, bind, format))
 208          return FALSE;
 209    }
 210
 211    if (bind & PIPE_BIND_RENDER_TARGET) {
 212       if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS)
 213          return FALSE;
 214
 215       /*
 216        * Although possible, it is unnatural to render into compressed or YUV
 217        * surfaces. So disable these here to avoid going into weird paths
 218        * inside the state trackers.
 219        */
 220       if (format_desc->block.width != 1 ||
 221           format_desc->block.height != 1)
 222          return FALSE;
 223    }
 224
 225    if (bind & PIPE_BIND_DEPTH_STENCIL) {
 226       if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
 227          return FALSE;
 228
 229       /*
 230        * TODO: Unfortunately we cannot render into anything more than 32 bits
 231        * because we encode depth and stencil clear values into a 32bit word.
 232        */
 233       if (format_desc->block.bits > 32)
 234          return FALSE;
 235
 236       /*
 237        * TODO: eliminate this restriction
 238        */
 239       if (format == PIPE_FORMAT_Z32_FLOAT)
 240          return FALSE;
 241    }
 242
 243    /*
 244     * All other operations (sampling, transfer, etc).
 245     */
 246
 247    if (format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
 248       return util_format_s3tc_enabled;
 249    }
 250
 251    /*
 252     * Everything else should be supported by u_format.
 253     */
 254    return TRUE;
 255 }
 256
 257
 258 static void
 259 softpipe_destroy_screen( struct pipe_screen *screen )
 260 {
 261    struct softpipe_screen *sp_screen = softpipe_screen(screen);
 262    struct sw_winsys *winsys = sp_screen->winsys;
 263
 264    if(winsys->destroy)
 265       winsys->destroy(winsys);
 266
 267    FREE(screen);
 268 }
 269
 270
 271 /* This is often overriden by the co-state tracker.
 272  */
 273 static void
 274 softpipe_flush_frontbuffer(struct pipe_screen *_screen,
 275                            struct pipe_resource *resource,
 276                            unsigned level, unsigned layer,
 277                            void *context_private)
 278 {
 279    struct softpipe_screen *screen = softpipe_screen(_screen);
 280    struct sw_winsys *winsys = screen->winsys;
 281    struct softpipe_resource *texture = softpipe_resource(resource);
 282
 283    assert(texture->dt);
 284    if (texture->dt)
 285       winsys->displaytarget_display(winsys, texture->dt, context_private);
 286 }
 287
 288 /**
 289  * Create a new pipe_screen object
 290  * Note: we're not presently subclassing pipe_screen (no softpipe_screen).
 291  */
 292 struct pipe_screen *
 293 softpipe_create_screen(struct sw_winsys *winsys)
 294 {
 295    struct softpipe_screen *screen = CALLOC_STRUCT(softpipe_screen);
 296
 297    if (!screen)
 298       return NULL;
 299
 300    screen->winsys = winsys;
 301
 302    screen->base.winsys = NULL;
 303    screen->base.destroy = softpipe_destroy_screen;
 304
 305    screen->base.get_name = softpipe_get_name;
 306    screen->base.get_vendor = softpipe_get_vendor;
 307    screen->base.get_param = softpipe_get_param;
 308    screen->base.get_shader_param = softpipe_get_shader_param;
 309    screen->base.get_paramf = softpipe_get_paramf;
 310    screen->base.is_format_supported = softpipe_is_format_supported;
 311    screen->base.context_create = softpipe_create_context;
 312    screen->base.flush_frontbuffer = softpipe_flush_frontbuffer;
 313
 314    util_format_s3tc_init();
 315
 316    softpipe_init_screen_texture_funcs(&screen->base);
 317    softpipe_init_screen_fence_funcs(&screen->base);
 318
 319    return &screen->base;
 320 }