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