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_INSTANCED_DRAWING:
 127       return 1;
 128    default:
 129       return 0;
 130    }
 131 }
 132
 133 static int
 134 softpipe_get_shader_param(struct pipe_screen *screen, unsigned shader, enum pipe_shader_cap param)
 135 {
 136    switch(shader)
 137    {
 138    case PIPE_SHADER_FRAGMENT:
 139       return tgsi_exec_get_shader_param(param);
 140    case PIPE_SHADER_VERTEX:
 141    case PIPE_SHADER_GEOMETRY:
 142       return draw_get_shader_param(shader, param);
 143    default:
 144       return 0;
 145    }
 146 }
 147
 148 static float
 149 softpipe_get_paramf(struct pipe_screen *screen, enum pipe_cap param)
 150 {
 151    switch (param) {
 152    case PIPE_CAP_MAX_LINE_WIDTH:
 153       /* fall-through */
 154    case PIPE_CAP_MAX_LINE_WIDTH_AA:
 155       return 255.0; /* arbitrary */
 156    case PIPE_CAP_MAX_POINT_WIDTH:
 157       /* fall-through */
 158    case PIPE_CAP_MAX_POINT_WIDTH_AA:
 159       return 255.0; /* arbitrary */
 160    case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
 161       return 16.0; /* not actually signficant at this time */
 162    case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
 163       return 16.0; /* arbitrary */
 164    default:
 165       return 0;
 166    }
 167 }
 168
 169
 170 /**
 171  * Query format support for creating a texture, drawing surface, etc.
 172  * \param format  the format to test
 173  * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
 174  */
 175 static boolean
 176 softpipe_is_format_supported( struct pipe_screen *screen,
 177                               enum pipe_format format,
 178                               enum pipe_texture_target target,
 179                               unsigned sample_count,
 180                               unsigned bind,
 181                               unsigned geom_flags )
 182 {
 183    struct sw_winsys *winsys = softpipe_screen(screen)->winsys;
 184    const struct util_format_description *format_desc;
 185
 186    assert(target == PIPE_BUFFER ||
 187           target == PIPE_TEXTURE_1D ||
 188           target == PIPE_TEXTURE_2D ||
 189           target == PIPE_TEXTURE_RECT ||
 190           target == PIPE_TEXTURE_3D ||
 191           target == PIPE_TEXTURE_CUBE);
 192
 193    format_desc = util_format_description(format);
 194    if (!format_desc)
 195       return FALSE;
 196
 197    if (sample_count > 1)
 198       return FALSE;
 199
 200    if (bind & (PIPE_BIND_DISPLAY_TARGET |
 201                PIPE_BIND_SCANOUT |
 202                PIPE_BIND_SHARED)) {
 203       if(!winsys->is_displaytarget_format_supported(winsys, bind, format))
 204          return FALSE;
 205    }
 206
 207    if (bind & PIPE_BIND_RENDER_TARGET) {
 208       if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS)
 209          return FALSE;
 210
 211       /*
 212        * Although possible, it is unnatural to render into compressed or YUV
 213        * surfaces. So disable these here to avoid going into weird paths
 214        * inside the state trackers.
 215        */
 216       if (format_desc->block.width != 1 ||
 217           format_desc->block.height != 1)
 218          return FALSE;
 219    }
 220
 221    if (bind & PIPE_BIND_DEPTH_STENCIL) {
 222       if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
 223          return FALSE;
 224
 225       /*
 226        * TODO: Unfortunately we cannot render into anything more than 32 bits
 227        * because we encode depth and stencil clear values into a 32bit word.
 228        */
 229       if (format_desc->block.bits > 32)
 230          return FALSE;
 231
 232       /*
 233        * TODO: eliminate this restriction
 234        */
 235       if (format == PIPE_FORMAT_Z32_FLOAT)
 236          return FALSE;
 237    }
 238
 239    /*
 240     * All other operations (sampling, transfer, etc).
 241     */
 242
 243    if (format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
 244       return util_format_s3tc_enabled;
 245    }
 246
 247    /*
 248     * Everything else should be supported by u_format.
 249     */
 250    return TRUE;
 251 }
 252
 253
 254 static void
 255 softpipe_destroy_screen( struct pipe_screen *screen )
 256 {
 257    struct softpipe_screen *sp_screen = softpipe_screen(screen);
 258    struct sw_winsys *winsys = sp_screen->winsys;
 259
 260    if(winsys->destroy)
 261       winsys->destroy(winsys);
 262
 263    FREE(screen);
 264 }
 265
 266
 267 /* This is often overriden by the co-state tracker.
 268  */
 269 static void
 270 softpipe_flush_frontbuffer(struct pipe_screen *_screen,
 271                            struct pipe_resource *resource,
 272                            unsigned level, unsigned layer,
 273                            void *context_private)
 274 {
 275    struct softpipe_screen *screen = softpipe_screen(_screen);
 276    struct sw_winsys *winsys = screen->winsys;
 277    struct softpipe_resource *texture = softpipe_resource(resource);
 278
 279    assert(texture->dt);
 280    if (texture->dt)
 281       winsys->displaytarget_display(winsys, texture->dt, context_private);
 282 }
 283
 284 /**
 285  * Create a new pipe_screen object
 286  * Note: we're not presently subclassing pipe_screen (no softpipe_screen).
 287  */
 288 struct pipe_screen *
 289 softpipe_create_screen(struct sw_winsys *winsys)
 290 {
 291    struct softpipe_screen *screen = CALLOC_STRUCT(softpipe_screen);
 292
 293    if (!screen)
 294       return NULL;
 295
 296    screen->winsys = winsys;
 297
 298    screen->base.winsys = NULL;
 299    screen->base.destroy = softpipe_destroy_screen;
 300
 301    screen->base.get_name = softpipe_get_name;
 302    screen->base.get_vendor = softpipe_get_vendor;
 303    screen->base.get_param = softpipe_get_param;
 304    screen->base.get_shader_param = softpipe_get_shader_param;
 305    screen->base.get_paramf = softpipe_get_paramf;
 306    screen->base.is_format_supported = softpipe_is_format_supported;
 307    screen->base.context_create = softpipe_create_context;
 308    screen->base.flush_frontbuffer = softpipe_flush_frontbuffer;
 309
 310    util_format_s3tc_init();
 311
 312    softpipe_init_screen_texture_funcs(&screen->base);
 313    softpipe_init_screen_fence_funcs(&screen->base);
 314
 315    return &screen->base;
 316 }