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    case PIPE_CAP_ARRAY_TEXTURES:
 129       return 1;
 130    default:
 131       return 0;
 132    }
 133 }
 134
 135 static int
 136 softpipe_get_shader_param(struct pipe_screen *screen, unsigned shader, enum pipe_shader_cap param)
 137 {
 138    switch(shader)
 139    {
 140    case PIPE_SHADER_FRAGMENT:
 141       return tgsi_exec_get_shader_param(param);
 142    case PIPE_SHADER_VERTEX:
 143    case PIPE_SHADER_GEOMETRY:
 144       return draw_get_shader_param(shader, param);
 145    default:
 146       return 0;
 147    }
 148 }
 149
 150 static float
 151 softpipe_get_paramf(struct pipe_screen *screen, enum pipe_cap param)
 152 {
 153    switch (param) {
 154    case PIPE_CAP_MAX_LINE_WIDTH:
 155       /* fall-through */
 156    case PIPE_CAP_MAX_LINE_WIDTH_AA:
 157       return 255.0; /* arbitrary */
 158    case PIPE_CAP_MAX_POINT_WIDTH:
 159       /* fall-through */
 160    case PIPE_CAP_MAX_POINT_WIDTH_AA:
 161       return 255.0; /* arbitrary */
 162    case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
 163       return 16.0; /* not actually signficant at this time */
 164    case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
 165       return 16.0; /* arbitrary */
 166    default:
 167       return 0;
 168    }
 169 }
 170
 171
 172 /**
 173  * Query format support for creating a texture, drawing surface, etc.
 174  * \param format  the format to test
 175  * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
 176  */
 177 static boolean
 178 softpipe_is_format_supported( struct pipe_screen *screen,
 179                               enum pipe_format format,
 180                               enum pipe_texture_target target,
 181                               unsigned sample_count,
 182                               unsigned bind,
 183                               unsigned geom_flags )
 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    /* u_format doesn't implement RGTC yet */
 252    if (format_desc->layout == UTIL_FORMAT_LAYOUT_RGTC) {
 253         return FALSE;
 254    }
 255
 256    /*
 257     * Everything else should be supported by u_format.
 258     */
 259    return TRUE;
 260 }
 261
 262
 263 static void
 264 softpipe_destroy_screen( struct pipe_screen *screen )
 265 {
 266    struct softpipe_screen *sp_screen = softpipe_screen(screen);
 267    struct sw_winsys *winsys = sp_screen->winsys;
 268
 269    if(winsys->destroy)
 270       winsys->destroy(winsys);
 271
 272    FREE(screen);
 273 }
 274
 275
 276 /* This is often overriden by the co-state tracker.
 277  */
 278 static void
 279 softpipe_flush_frontbuffer(struct pipe_screen *_screen,
 280                            struct pipe_resource *resource,
 281                            unsigned level, unsigned layer,
 282                            void *context_private)
 283 {
 284    struct softpipe_screen *screen = softpipe_screen(_screen);
 285    struct sw_winsys *winsys = screen->winsys;
 286    struct softpipe_resource *texture = softpipe_resource(resource);
 287
 288    assert(texture->dt);
 289    if (texture->dt)
 290       winsys->displaytarget_display(winsys, texture->dt, context_private);
 291 }
 292
 293 /**
 294  * Create a new pipe_screen object
 295  * Note: we're not presently subclassing pipe_screen (no softpipe_screen).
 296  */
 297 struct pipe_screen *
 298 softpipe_create_screen(struct sw_winsys *winsys)
 299 {
 300    struct softpipe_screen *screen = CALLOC_STRUCT(softpipe_screen);
 301
 302    if (!screen)
 303       return NULL;
 304
 305    screen->winsys = winsys;
 306
 307    screen->base.winsys = NULL;
 308    screen->base.destroy = softpipe_destroy_screen;
 309
 310    screen->base.get_name = softpipe_get_name;
 311    screen->base.get_vendor = softpipe_get_vendor;
 312    screen->base.get_param = softpipe_get_param;
 313    screen->base.get_shader_param = softpipe_get_shader_param;
 314    screen->base.get_paramf = softpipe_get_paramf;
 315    screen->base.is_format_supported = softpipe_is_format_supported;
 316    screen->base.context_create = softpipe_create_context;
 317    screen->base.flush_frontbuffer = softpipe_flush_frontbuffer;
 318
 319    util_format_s3tc_init();
 320
 321    softpipe_init_screen_texture_funcs(&screen->base);
 322    softpipe_init_screen_fence_funcs(&screen->base);
 323
 324    return &screen->base;
 325 }