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 "util/u_video.h"
  33 #include "pipe/p_defines.h"
  34 #include "pipe/p_screen.h"
  35 #include "draw/draw_context.h"
  36 #include "vl/vl_video_buffer.h"
  37
  38 #include "state_tracker/sw_winsys.h"
  39 #include "tgsi/tgsi_exec.h"
  40
  41 #include "sp_texture.h"
  42 #include "sp_screen.h"
  43 #include "sp_context.h"
  44 #include "sp_fence.h"
  45 #include "sp_public.h"
  46
  47
  48 static const char *
  49 softpipe_get_vendor(struct pipe_screen *screen)
  50 {
  51    return "VMware, Inc.";
  52 }
  53
  54
  55 static const char *
  56 softpipe_get_name(struct pipe_screen *screen)
  57 {
  58    return "softpipe";
  59 }
  60
  61
  62 static int
  63 softpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
  64 {
  65    switch (param) {
  66    case PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS:
  67       return PIPE_MAX_SAMPLERS;
  68    case PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS:
  69 #ifdef HAVE_LLVM
  70       /* Softpipe doesn't yet know how to tell draw/llvm about textures */
  71       return 0;
  72 #else
  73       return PIPE_MAX_VERTEX_SAMPLERS;
  74 #endif
  75    case PIPE_CAP_MAX_COMBINED_SAMPLERS:
  76       return PIPE_MAX_SAMPLERS + PIPE_MAX_VERTEX_SAMPLERS;
  77    case PIPE_CAP_NPOT_TEXTURES:
  78       return 1;
  79    case PIPE_CAP_TWO_SIDED_STENCIL:
  80       return 1;
  81    case PIPE_CAP_GLSL:
  82       return 1;
  83    case PIPE_CAP_SM3:
  84       return 1;
  85    case PIPE_CAP_ANISOTROPIC_FILTER:
  86       return 1;
  87    case PIPE_CAP_POINT_SPRITE:
  88       return 1;
  89    case PIPE_CAP_MAX_RENDER_TARGETS:
  90       return PIPE_MAX_COLOR_BUFS;
  91    case PIPE_CAP_OCCLUSION_QUERY:
  92       return 1;
  93    case PIPE_CAP_TIMER_QUERY:
  94       return 1;
  95    case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
  96       return 1;
  97    case PIPE_CAP_TEXTURE_MIRROR_REPEAT:
  98       return 1;
  99    case PIPE_CAP_TEXTURE_SHADOW_MAP:
 100       return 1;
 101    case PIPE_CAP_TEXTURE_SWIZZLE:
 102       return 1;
 103    case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
 104       return SP_MAX_TEXTURE_2D_LEVELS;
 105    case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
 106       return SP_MAX_TEXTURE_3D_LEVELS;
 107    case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 108       return SP_MAX_TEXTURE_2D_LEVELS;
 109    case PIPE_CAP_BLEND_EQUATION_SEPARATE:
 110       return 1;
 111    case PIPE_CAP_INDEP_BLEND_ENABLE:
 112       return 1;
 113    case PIPE_CAP_INDEP_BLEND_FUNC:
 114       return 1;
 115    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
 116    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
 117    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
 118    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
 119       return 1;
 120    case PIPE_CAP_STREAM_OUTPUT:
 121       return 1;
 122    case PIPE_CAP_PRIMITIVE_RESTART:
 123       return 1;
 124    case PIPE_CAP_DEPTHSTENCIL_CLEAR_SEPARATE:
 125       return 0;
 126    case PIPE_CAP_SHADER_STENCIL_EXPORT:
 127       return 1;
 128    case PIPE_CAP_TGSI_INSTANCEID:
 129    case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
 130       return 1;
 131    case PIPE_CAP_ARRAY_TEXTURES:
 132       return 1;
 133    default:
 134       return 0;
 135    }
 136 }
 137
 138 static int
 139 softpipe_get_shader_param(struct pipe_screen *screen, unsigned shader, enum pipe_shader_cap param)
 140 {
 141    switch(shader)
 142    {
 143    case PIPE_SHADER_FRAGMENT:
 144       return tgsi_exec_get_shader_param(param);
 145    case PIPE_SHADER_VERTEX:
 146    case PIPE_SHADER_GEOMETRY:
 147       return draw_get_shader_param(shader, param);
 148    default:
 149       return 0;
 150    }
 151 }
 152
 153 static float
 154 softpipe_get_paramf(struct pipe_screen *screen, enum pipe_cap param)
 155 {
 156    switch (param) {
 157    case PIPE_CAP_MAX_LINE_WIDTH:
 158       /* fall-through */
 159    case PIPE_CAP_MAX_LINE_WIDTH_AA:
 160       return 255.0; /* arbitrary */
 161    case PIPE_CAP_MAX_POINT_WIDTH:
 162       /* fall-through */
 163    case PIPE_CAP_MAX_POINT_WIDTH_AA:
 164       return 255.0; /* arbitrary */
 165    case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
 166       return 16.0;
 167    case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
 168       return 16.0; /* arbitrary */
 169    default:
 170       return 0;
 171    }
 172 }
 173
 174 static int
 175 softpipe_get_video_param(struct pipe_screen *screen,
 176                          enum pipe_video_profile profile,
 177                          enum pipe_video_cap param)
 178 {
 179    switch (param) {
 180    case PIPE_VIDEO_CAP_NPOT_TEXTURES:
 181       return 0;
 182    default:
 183       return 0;
 184    }
 185 }
 186
 187 /**
 188  * Query format support for creating a texture, drawing surface, etc.
 189  * \param format  the format to test
 190  * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
 191  */
 192 static boolean
 193 softpipe_is_format_supported( struct pipe_screen *screen,
 194                               enum pipe_format format,
 195                               enum pipe_texture_target target,
 196                               unsigned sample_count,
 197                               unsigned bind)
 198 {
 199    struct sw_winsys *winsys = softpipe_screen(screen)->winsys;
 200    const struct util_format_description *format_desc;
 201
 202    assert(target == PIPE_BUFFER ||
 203           target == PIPE_TEXTURE_1D ||
 204           target == PIPE_TEXTURE_1D_ARRAY ||
 205           target == PIPE_TEXTURE_2D ||
 206           target == PIPE_TEXTURE_2D_ARRAY ||
 207           target == PIPE_TEXTURE_RECT ||
 208           target == PIPE_TEXTURE_3D ||
 209           target == PIPE_TEXTURE_CUBE);
 210
 211    format_desc = util_format_description(format);
 212    if (!format_desc)
 213       return FALSE;
 214
 215    if (sample_count > 1)
 216       return FALSE;
 217
 218    if (bind & (PIPE_BIND_DISPLAY_TARGET |
 219                PIPE_BIND_SCANOUT |
 220                PIPE_BIND_SHARED)) {
 221       if(!winsys->is_displaytarget_format_supported(winsys, bind, format))
 222          return FALSE;
 223    }
 224
 225    if (bind & PIPE_BIND_RENDER_TARGET) {
 226       if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS)
 227          return FALSE;
 228
 229       /*
 230        * Although possible, it is unnatural to render into compressed or YUV
 231        * surfaces. So disable these here to avoid going into weird paths
 232        * inside the state trackers.
 233        */
 234       if (format_desc->block.width != 1 ||
 235           format_desc->block.height != 1)
 236          return FALSE;
 237    }
 238
 239    if (bind & PIPE_BIND_DEPTH_STENCIL) {
 240       if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
 241          return FALSE;
 242
 243       /*
 244        * TODO: Unfortunately we cannot render into anything more than 32 bits
 245        * because we encode depth and stencil clear values into a 32bit word.
 246        */
 247       if (format_desc->block.bits > 32)
 248          return FALSE;
 249
 250       /*
 251        * TODO: eliminate this restriction
 252        */
 253       if (format == PIPE_FORMAT_Z32_FLOAT)
 254          return FALSE;
 255    }
 256
 257    /*
 258     * All other operations (sampling, transfer, etc).
 259     */
 260
 261    if (format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
 262       return util_format_s3tc_enabled;
 263    }
 264
 265    /*
 266     * Everything else should be supported by u_format.
 267     */
 268    return TRUE;
 269 }
 270
 271
 272 static void
 273 softpipe_destroy_screen( struct pipe_screen *screen )
 274 {
 275    struct softpipe_screen *sp_screen = softpipe_screen(screen);
 276    struct sw_winsys *winsys = sp_screen->winsys;
 277
 278    if(winsys->destroy)
 279       winsys->destroy(winsys);
 280
 281    FREE(screen);
 282 }
 283
 284
 285 /* This is often overriden by the co-state tracker.
 286  */
 287 static void
 288 softpipe_flush_frontbuffer(struct pipe_screen *_screen,
 289                            struct pipe_resource *resource,
 290                            unsigned level, unsigned layer,
 291                            void *context_private)
 292 {
 293    struct softpipe_screen *screen = softpipe_screen(_screen);
 294    struct sw_winsys *winsys = screen->winsys;
 295    struct softpipe_resource *texture = softpipe_resource(resource);
 296
 297    assert(texture->dt);
 298    if (texture->dt)
 299       winsys->displaytarget_display(winsys, texture->dt, context_private);
 300 }
 301
 302 /**
 303  * Create a new pipe_screen object
 304  * Note: we're not presently subclassing pipe_screen (no softpipe_screen).
 305  */
 306 struct pipe_screen *
 307 softpipe_create_screen(struct sw_winsys *winsys)
 308 {
 309    struct softpipe_screen *screen = CALLOC_STRUCT(softpipe_screen);
 310
 311    if (!screen)
 312       return NULL;
 313
 314    screen->winsys = winsys;
 315
 316    screen->base.winsys = NULL;
 317    screen->base.destroy = softpipe_destroy_screen;
 318
 319    screen->base.get_name = softpipe_get_name;
 320    screen->base.get_vendor = softpipe_get_vendor;
 321    screen->base.get_param = softpipe_get_param;
 322    screen->base.get_shader_param = softpipe_get_shader_param;
 323    screen->base.get_paramf = softpipe_get_paramf;
 324    screen->base.get_video_param = softpipe_get_video_param;
 325    screen->base.is_format_supported = softpipe_is_format_supported;
 326    screen->base.is_video_format_supported = vl_video_buffer_is_format_supported;
 327    screen->base.context_create = softpipe_create_context;
 328    screen->base.flush_frontbuffer = softpipe_flush_frontbuffer;
 329
 330    util_format_s3tc_init();
 331
 332    softpipe_init_screen_texture_funcs(&screen->base);
 333    softpipe_init_screen_fence_funcs(&screen->base);
 334
 335    return &screen->base;
 336 }