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