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_DEPTHSTENCIL_CLEAR_SEPARATE:
 117       return 0;
 118    default:
 119       return 0;
 120    }
 121 }
 122
 123 static int
 124 softpipe_get_shader_param(struct pipe_screen *screen, unsigned shader, enum pipe_shader_cap param)
 125 {
 126    switch(shader)
 127    {
 128    case PIPE_SHADER_FRAGMENT:
 129       return tgsi_exec_get_shader_param(param);
 130    case PIPE_SHADER_VERTEX:
 131    case PIPE_SHADER_GEOMETRY:
 132       return draw_get_shader_param(shader, param);
 133    default:
 134       return 0;
 135    }
 136 }
 137
 138 static float
 139 softpipe_get_paramf(struct pipe_screen *screen, enum pipe_cap param)
 140 {
 141    switch (param) {
 142    case PIPE_CAP_MAX_LINE_WIDTH:
 143       /* fall-through */
 144    case PIPE_CAP_MAX_LINE_WIDTH_AA:
 145       return 255.0; /* arbitrary */
 146    case PIPE_CAP_MAX_POINT_WIDTH:
 147       /* fall-through */
 148    case PIPE_CAP_MAX_POINT_WIDTH_AA:
 149       return 255.0; /* arbitrary */
 150    case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
 151       return 16.0; /* not actually signficant at this time */
 152    case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
 153       return 16.0; /* arbitrary */
 154    default:
 155       return 0;
 156    }
 157 }
 158
 159
 160 /**
 161  * Query format support for creating a texture, drawing surface, etc.
 162  * \param format  the format to test
 163  * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
 164  */
 165 static boolean
 166 softpipe_is_format_supported( struct pipe_screen *screen,
 167                               enum pipe_format format,
 168                               enum pipe_texture_target target,
 169                               unsigned sample_count,
 170                               unsigned bind,
 171                               unsigned geom_flags )
 172 {
 173    struct sw_winsys *winsys = softpipe_screen(screen)->winsys;
 174    const struct util_format_description *format_desc;
 175
 176    assert(target == PIPE_BUFFER ||
 177           target == PIPE_TEXTURE_1D ||
 178           target == PIPE_TEXTURE_2D ||
 179           target == PIPE_TEXTURE_RECT ||
 180           target == PIPE_TEXTURE_3D ||
 181           target == PIPE_TEXTURE_CUBE);
 182
 183    format_desc = util_format_description(format);
 184    if (!format_desc)
 185       return FALSE;
 186
 187    if (sample_count > 1)
 188       return FALSE;
 189
 190    if (bind & (PIPE_BIND_DISPLAY_TARGET |
 191                PIPE_BIND_SCANOUT |
 192                PIPE_BIND_SHARED)) {
 193       if(!winsys->is_displaytarget_format_supported(winsys, bind, format))
 194          return FALSE;
 195    }
 196
 197    if (bind & PIPE_BIND_RENDER_TARGET) {
 198       if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS)
 199          return FALSE;
 200
 201       /*
 202        * Although possible, it is unnatural to render into compressed or YUV
 203        * surfaces. So disable these here to avoid going into weird paths
 204        * inside the state trackers.
 205        */
 206       if (format_desc->block.width != 1 ||
 207           format_desc->block.height != 1)
 208          return FALSE;
 209
 210       /*
 211        * TODO: Unfortunately we cannot render into anything more than 32 bits
 212        * because we encode color clear values into a 32bit word.
 213        */
 214       if (format_desc->block.bits > 32)
 215          return FALSE;
 216    }
 217
 218    if (bind & PIPE_BIND_DEPTH_STENCIL) {
 219       if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
 220          return FALSE;
 221
 222       /*
 223        * TODO: Unfortunately we cannot render into anything more than 32 bits
 224        * because we encode depth and stencil clear values into a 32bit word.
 225        */
 226       if (format_desc->block.bits > 32)
 227          return FALSE;
 228
 229       /*
 230        * TODO: eliminate this restriction
 231        */
 232       if (format == PIPE_FORMAT_Z32_FLOAT)
 233          return FALSE;
 234    }
 235
 236    /*
 237     * All other operations (sampling, transfer, etc).
 238     */
 239
 240    if (format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
 241       return util_format_s3tc_enabled;
 242    }
 243
 244    /*
 245     * Everything else should be supported by u_format.
 246     */
 247    return TRUE;
 248 }
 249
 250
 251 static void
 252 softpipe_destroy_screen( struct pipe_screen *screen )
 253 {
 254    struct softpipe_screen *sp_screen = softpipe_screen(screen);
 255    struct sw_winsys *winsys = sp_screen->winsys;
 256
 257    if(winsys->destroy)
 258       winsys->destroy(winsys);
 259
 260    FREE(screen);
 261 }
 262
 263
 264 /* This is often overriden by the co-state tracker.
 265  */
 266 static void
 267 softpipe_flush_frontbuffer(struct pipe_screen *_screen,
 268                            struct pipe_surface *surface,
 269                            void *context_private)
 270 {
 271    struct softpipe_screen *screen = softpipe_screen(_screen);
 272    struct sw_winsys *winsys = screen->winsys;
 273    struct softpipe_resource *texture = softpipe_resource(surface->texture);
 274
 275    assert(texture->dt);
 276    if (texture->dt)
 277       winsys->displaytarget_display(winsys, texture->dt, context_private);
 278 }
 279
 280 /**
 281  * Create a new pipe_screen object
 282  * Note: we're not presently subclassing pipe_screen (no softpipe_screen).
 283  */
 284 struct pipe_screen *
 285 softpipe_create_screen(struct sw_winsys *winsys)
 286 {
 287    struct softpipe_screen *screen = CALLOC_STRUCT(softpipe_screen);
 288
 289    if (!screen)
 290       return NULL;
 291
 292    screen->winsys = winsys;
 293
 294    screen->base.winsys = NULL;
 295    screen->base.destroy = softpipe_destroy_screen;
 296
 297    screen->base.get_name = softpipe_get_name;
 298    screen->base.get_vendor = softpipe_get_vendor;
 299    screen->base.get_param = softpipe_get_param;
 300    screen->base.get_shader_param = softpipe_get_shader_param;
 301    screen->base.get_paramf = softpipe_get_paramf;
 302    screen->base.is_format_supported = softpipe_is_format_supported;
 303    screen->base.context_create = softpipe_create_context;
 304    screen->base.flush_frontbuffer = softpipe_flush_frontbuffer;
 305    screen->base.video_context_create = sp_video_create;
 306
 307    util_format_s3tc_init();
 308
 309    softpipe_init_screen_texture_funcs(&screen->base);
 310    softpipe_init_screen_fence_funcs(&screen->base);
 311
 312    return &screen->base;
 313 }