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