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_decoder.h"
  37 #include "vl/vl_video_buffer.h"
  38
  39 #include "state_tracker/sw_winsys.h"
  40 #include "tgsi/tgsi_exec.h"
  41
  42 #include "sp_texture.h"
  43 #include "sp_screen.h"
  44 #include "sp_context.h"
  45 #include "sp_fence.h"
  46 #include "sp_public.h"
  47
  48
  49 static const char *
  50 softpipe_get_vendor(struct pipe_screen *screen)
  51 {
  52    return "VMware, Inc.";
  53 }
  54
  55
  56 static const char *
  57 softpipe_get_name(struct pipe_screen *screen)
  58 {
  59    return "softpipe";
  60 }
  61
  62
  63 static int
  64 softpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
  65 {
  66    switch (param) {
  67    case PIPE_CAP_MAX_COMBINED_SAMPLERS:
  68       return PIPE_MAX_SAMPLERS + PIPE_MAX_VERTEX_SAMPLERS;
  69    case PIPE_CAP_NPOT_TEXTURES:
  70       return 1;
  71    case PIPE_CAP_TWO_SIDED_STENCIL:
  72       return 1;
  73    case PIPE_CAP_SM3:
  74       return 1;
  75    case PIPE_CAP_ANISOTROPIC_FILTER:
  76       return 1;
  77    case PIPE_CAP_POINT_SPRITE:
  78       return 1;
  79    case PIPE_CAP_MAX_RENDER_TARGETS:
  80       return PIPE_MAX_COLOR_BUFS;
  81    case PIPE_CAP_OCCLUSION_QUERY:
  82       return 1;
  83    case PIPE_CAP_TIMER_QUERY:
  84       return 1;
  85    case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
  86       return 1;
  87    case PIPE_CAP_TEXTURE_SHADOW_MAP:
  88       return 1;
  89    case PIPE_CAP_TEXTURE_SWIZZLE:
  90       return 1;
  91    case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
  92       return SP_MAX_TEXTURE_2D_LEVELS;
  93    case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
  94       return SP_MAX_TEXTURE_3D_LEVELS;
  95    case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
  96       return SP_MAX_TEXTURE_2D_LEVELS;
  97    case PIPE_CAP_BLEND_EQUATION_SEPARATE:
  98       return 1;
  99    case PIPE_CAP_INDEP_BLEND_ENABLE:
 100       return 1;
 101    case PIPE_CAP_INDEP_BLEND_FUNC:
 102       return 1;
 103    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
 104    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
 105    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
 106    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
 107       return 1;
 108    case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
 109       return 0;
 110    case PIPE_CAP_PRIMITIVE_RESTART:
 111       return 1;
 112    case PIPE_CAP_DEPTHSTENCIL_CLEAR_SEPARATE:
 113       return 0;
 114    case PIPE_CAP_SHADER_STENCIL_EXPORT:
 115       return 1;
 116    case PIPE_CAP_TGSI_INSTANCEID:
 117    case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
 118       return 1;
 119    case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
 120       return 64; /* matches core Mesa defaults */
 121    case PIPE_CAP_MIN_TEXEL_OFFSET:
 122       return -8;
 123    case PIPE_CAP_MAX_TEXEL_OFFSET:
 124       return 7;
 125    case PIPE_CAP_CONDITIONAL_RENDER:
 126       return 1;
 127    default:
 128       return 0;
 129    }
 130 }
 131
 132 static int
 133 softpipe_get_shader_param(struct pipe_screen *screen, unsigned shader, enum pipe_shader_cap param)
 134 {
 135    switch(shader)
 136    {
 137    case PIPE_SHADER_FRAGMENT:
 138       return tgsi_exec_get_shader_param(param);
 139    case PIPE_SHADER_VERTEX:
 140    case PIPE_SHADER_GEOMETRY:
 141       switch (param) {
 142       case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 143 #ifdef HAVE_LLVM
 144          /* Softpipe doesn't yet know how to tell draw/llvm about textures */
 145          return 0;
 146 #else
 147          return PIPE_MAX_VERTEX_SAMPLERS;
 148 #endif
 149       default:
 150          return draw_get_shader_param(shader, param);
 151       }
 152    default:
 153       return 0;
 154    }
 155 }
 156
 157 static float
 158 softpipe_get_paramf(struct pipe_screen *screen, enum pipe_capf param)
 159 {
 160    switch (param) {
 161    case PIPE_CAPF_MAX_LINE_WIDTH:
 162       /* fall-through */
 163    case PIPE_CAPF_MAX_LINE_WIDTH_AA:
 164       return 255.0; /* arbitrary */
 165    case PIPE_CAPF_MAX_POINT_WIDTH:
 166       /* fall-through */
 167    case PIPE_CAPF_MAX_POINT_WIDTH_AA:
 168       return 255.0; /* arbitrary */
 169    case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
 170       return 16.0;
 171    case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
 172       return 16.0; /* arbitrary */
 173    default:
 174       return 0;
 175    }
 176 }
 177
 178 static int
 179 softpipe_get_video_param(struct pipe_screen *screen,
 180                          enum pipe_video_profile profile,
 181                          enum pipe_video_cap param)
 182 {
 183    switch (param) {
 184    case PIPE_VIDEO_CAP_SUPPORTED:
 185        return vl_profile_supported(screen, profile);
 186    case PIPE_VIDEO_CAP_NPOT_TEXTURES:
 187       return 0;
 188    case PIPE_VIDEO_CAP_MAX_WIDTH:
 189    case PIPE_VIDEO_CAP_MAX_HEIGHT:
 190       return vl_video_buffer_max_size(screen);
 191    case PIPE_VIDEO_CAP_NUM_BUFFERS_DESIRED:
 192       return vl_num_buffers_desired(screen, profile);
 193    default:
 194       return 0;
 195    }
 196 }
 197
 198 /**
 199  * Query format support for creating a texture, drawing surface, etc.
 200  * \param format  the format to test
 201  * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
 202  */
 203 static boolean
 204 softpipe_is_format_supported( struct pipe_screen *screen,
 205                               enum pipe_format format,
 206                               enum pipe_texture_target target,
 207                               unsigned sample_count,
 208                               unsigned bind)
 209 {
 210    struct sw_winsys *winsys = softpipe_screen(screen)->winsys;
 211    const struct util_format_description *format_desc;
 212
 213    assert(target == PIPE_BUFFER ||
 214           target == PIPE_TEXTURE_1D ||
 215           target == PIPE_TEXTURE_1D_ARRAY ||
 216           target == PIPE_TEXTURE_2D ||
 217           target == PIPE_TEXTURE_2D_ARRAY ||
 218           target == PIPE_TEXTURE_RECT ||
 219           target == PIPE_TEXTURE_3D ||
 220           target == PIPE_TEXTURE_CUBE);
 221
 222    format_desc = util_format_description(format);
 223    if (!format_desc)
 224       return FALSE;
 225
 226    if (sample_count > 1)
 227       return FALSE;
 228
 229    if (bind & (PIPE_BIND_DISPLAY_TARGET |
 230                PIPE_BIND_SCANOUT |
 231                PIPE_BIND_SHARED)) {
 232       if(!winsys->is_displaytarget_format_supported(winsys, bind, format))
 233          return FALSE;
 234    }
 235
 236    if (bind & PIPE_BIND_RENDER_TARGET) {
 237       if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS)
 238          return FALSE;
 239
 240       /*
 241        * Although possible, it is unnatural to render into compressed or YUV
 242        * surfaces. So disable these here to avoid going into weird paths
 243        * inside the state trackers.
 244        */
 245       if (format_desc->block.width != 1 ||
 246           format_desc->block.height != 1)
 247          return FALSE;
 248    }
 249
 250    if (bind & PIPE_BIND_DEPTH_STENCIL) {
 251       if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
 252          return FALSE;
 253    }
 254
 255    /*
 256     * All other operations (sampling, transfer, etc).
 257     */
 258
 259    if (format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
 260       return util_format_s3tc_enabled;
 261    }
 262
 263    /*
 264     * Everything else should be supported by u_format.
 265     */
 266    return TRUE;
 267 }
 268
 269
 270 static void
 271 softpipe_destroy_screen( struct pipe_screen *screen )
 272 {
 273    struct softpipe_screen *sp_screen = softpipe_screen(screen);
 274    struct sw_winsys *winsys = sp_screen->winsys;
 275
 276    if(winsys->destroy)
 277       winsys->destroy(winsys);
 278
 279    FREE(screen);
 280 }
 281
 282
 283 /* This is often overriden by the co-state tracker.
 284  */
 285 static void
 286 softpipe_flush_frontbuffer(struct pipe_screen *_screen,
 287                            struct pipe_resource *resource,
 288                            unsigned level, unsigned layer,
 289                            void *context_private)
 290 {
 291    struct softpipe_screen *screen = softpipe_screen(_screen);
 292    struct sw_winsys *winsys = screen->winsys;
 293    struct softpipe_resource *texture = softpipe_resource(resource);
 294
 295    assert(texture->dt);
 296    if (texture->dt)
 297       winsys->displaytarget_display(winsys, texture->dt, context_private);
 298 }
 299
 300 /**
 301  * Create a new pipe_screen object
 302  * Note: we're not presently subclassing pipe_screen (no softpipe_screen).
 303  */
 304 struct pipe_screen *
 305 softpipe_create_screen(struct sw_winsys *winsys)
 306 {
 307    struct softpipe_screen *screen = CALLOC_STRUCT(softpipe_screen);
 308
 309    if (!screen)
 310       return NULL;
 311
 312    screen->winsys = winsys;
 313
 314    screen->base.winsys = NULL;
 315    screen->base.destroy = softpipe_destroy_screen;
 316
 317    screen->base.get_name = softpipe_get_name;
 318    screen->base.get_vendor = softpipe_get_vendor;
 319    screen->base.get_param = softpipe_get_param;
 320    screen->base.get_shader_param = softpipe_get_shader_param;
 321    screen->base.get_paramf = softpipe_get_paramf;
 322    screen->base.get_video_param = softpipe_get_video_param;
 323    screen->base.is_format_supported = softpipe_is_format_supported;
 324    screen->base.is_video_format_supported = vl_video_buffer_is_format_supported;
 325    screen->base.context_create = softpipe_create_context;
 326    screen->base.flush_frontbuffer = softpipe_flush_frontbuffer;
 327
 328    util_format_s3tc_init();
 329
 330    softpipe_init_screen_texture_funcs(&screen->base);
 331    softpipe_init_screen_fence_funcs(&screen->base);
 332
 333    return &screen->base;
 334 }