src/gallium/drivers/llvmpipe/lp_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
  35 #include "lp_texture.h"
  36 #include "lp_buffer.h"
  37 #include "lp_fence.h"
  38 #include "lp_jit.h"
  39 #include "lp_screen.h"
  40 #include "lp_context.h"
  41 #include "lp_debug.h"
  42 #include "lp_public.h"
  43
  44 #include "state_tracker/sw_winsys.h"
  45
  46 #ifdef DEBUG
  47 int LP_DEBUG = 0;
  48
  49 static const struct debug_named_value lp_debug_flags[] = {
  50    { "pipe",   DEBUG_PIPE },
  51    { "tgsi",   DEBUG_TGSI },
  52    { "tex",    DEBUG_TEX },
  53    { "asm",    DEBUG_ASM },
  54    { "setup",  DEBUG_SETUP },
  55    { "rast",   DEBUG_RAST },
  56    { "query",  DEBUG_QUERY },
  57    { "screen", DEBUG_SCREEN },
  58    { "jit",    DEBUG_JIT },
  59    { "show_tiles",    DEBUG_SHOW_TILES },
  60    { "show_subtiles", DEBUG_SHOW_SUBTILES },
  61    { "counters", DEBUG_COUNTERS },
  62    { "nopt", DEBUG_NO_LLVM_OPT },
  63    {NULL, 0}
  64 };
  65 #endif
  66
  67
  68 static const char *
  69 llvmpipe_get_vendor(struct pipe_screen *screen)
  70 {
  71    return "VMware, Inc.";
  72 }
  73
  74
  75 static const char *
  76 llvmpipe_get_name(struct pipe_screen *screen)
  77 {
  78    return "llvmpipe";
  79 }
  80
  81
  82 static int
  83 llvmpipe_get_param(struct pipe_screen *screen, int param)
  84 {
  85    switch (param) {
  86    case PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS:
  87       return PIPE_MAX_SAMPLERS;
  88    case PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS:
  89       return 0;
  90    case PIPE_CAP_MAX_COMBINED_SAMPLERS:
  91       return PIPE_MAX_SAMPLERS + PIPE_MAX_VERTEX_SAMPLERS;
  92    case PIPE_CAP_NPOT_TEXTURES:
  93       return 1;
  94    case PIPE_CAP_TWO_SIDED_STENCIL:
  95       return 1;
  96    case PIPE_CAP_GLSL:
  97       return 1;
  98    case PIPE_CAP_ANISOTROPIC_FILTER:
  99       return 0;
 100    case PIPE_CAP_POINT_SPRITE:
 101       return 1;
 102    case PIPE_CAP_MAX_RENDER_TARGETS:
 103       return PIPE_MAX_COLOR_BUFS;
 104    case PIPE_CAP_OCCLUSION_QUERY:
 105       return 1;
 106    case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
 107       return 1;
 108    case PIPE_CAP_TEXTURE_MIRROR_REPEAT:
 109       return 1;
 110    case PIPE_CAP_TEXTURE_SHADOW_MAP:
 111       return 1;
 112    case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
 113       return LP_MAX_TEXTURE_2D_LEVELS;
 114    case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
 115       return LP_MAX_TEXTURE_3D_LEVELS;
 116    case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 117       return LP_MAX_TEXTURE_2D_LEVELS;
 118    case PIPE_CAP_TGSI_CONT_SUPPORTED:
 119       return 1;
 120    case PIPE_CAP_BLEND_EQUATION_SEPARATE:
 121       return 1;
 122    case PIPE_CAP_INDEP_BLEND_ENABLE:
 123       return 0;
 124    case PIPE_CAP_INDEP_BLEND_FUNC:
 125       return 0;
 126    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
 127    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
 128       return 1;
 129    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
 130    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
 131       return 0;
 132    default:
 133       return 0;
 134    }
 135 }
 136
 137
 138 static float
 139 llvmpipe_get_paramf(struct pipe_screen *screen, int 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 llvmpipe_is_format_supported( struct pipe_screen *_screen,
 167                               enum pipe_format format,
 168                               enum pipe_texture_target target,
 169                               unsigned tex_usage,
 170                               unsigned geom_flags )
 171 {
 172    struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
 173    struct sw_winsys *winsys = screen->winsys;
 174    const struct util_format_description *format_desc;
 175
 176    format_desc = util_format_description(format);
 177    if(!format_desc)
 178       return FALSE;
 179
 180    assert(target == PIPE_TEXTURE_1D ||
 181           target == PIPE_TEXTURE_2D ||
 182           target == PIPE_TEXTURE_3D ||
 183           target == PIPE_TEXTURE_CUBE);
 184
 185    switch(format) {
 186    case PIPE_FORMAT_DXT1_RGB:
 187    case PIPE_FORMAT_DXT1_RGBA:
 188    case PIPE_FORMAT_DXT3_RGBA:
 189    case PIPE_FORMAT_DXT5_RGBA:
 190       return util_format_s3tc_enabled;
 191    default:
 192       break;
 193    }
 194
 195    if(tex_usage & PIPE_TEXTURE_USAGE_RENDER_TARGET) {
 196       if(format_desc->layout != UTIL_FORMAT_LAYOUT_PLAIN)
 197          return FALSE;
 198
 199       if(format_desc->block.width != 1 ||
 200          format_desc->block.height != 1)
 201          return FALSE;
 202
 203       if(format_desc->colorspace != UTIL_FORMAT_COLORSPACE_RGB &&
 204          format_desc->colorspace != UTIL_FORMAT_COLORSPACE_SRGB)
 205          return FALSE;
 206    }
 207
 208    if(tex_usage & (PIPE_TEXTURE_USAGE_DISPLAY_TARGET |
 209                    PIPE_TEXTURE_USAGE_SCANOUT |
 210                    PIPE_TEXTURE_USAGE_SHARED)) {
 211       if(!winsys->is_displaytarget_format_supported(winsys, tex_usage, format))
 212          return FALSE;
 213    }
 214
 215    if(tex_usage & PIPE_TEXTURE_USAGE_DEPTH_STENCIL) {
 216       if(format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
 217          return FALSE;
 218
 219       /* FIXME: Temporary restriction. See lp_state_fs.c. */
 220       if(format_desc->block.bits != 32)
 221          return FALSE;
 222    }
 223
 224    return TRUE;
 225 }
 226
 227
 228
 229
 230 static void
 231 llvmpipe_flush_frontbuffer(struct pipe_screen *_screen,
 232                            struct pipe_surface *surface,
 233                            void *context_private)
 234 {
 235    struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
 236    struct sw_winsys *winsys = screen->winsys;
 237    struct llvmpipe_texture *texture = llvmpipe_texture(surface->texture);
 238
 239    assert(texture->dt);
 240    if (texture->dt)
 241       winsys->displaytarget_display(winsys, texture->dt, context_private);
 242 }
 243
 244
 245 static void
 246 llvmpipe_destroy_screen( struct pipe_screen *_screen )
 247 {
 248    struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
 249    struct sw_winsys *winsys = screen->winsys;
 250
 251    lp_jit_screen_cleanup(screen);
 252
 253    if(winsys->destroy)
 254       winsys->destroy(winsys);
 255
 256    FREE(screen);
 257 }
 258
 259
 260
 261 /**
 262  * Create a new pipe_screen object
 263  * Note: we're not presently subclassing pipe_screen (no llvmpipe_screen).
 264  */
 265 struct pipe_screen *
 266 llvmpipe_create_screen(struct sw_winsys *winsys)
 267 {
 268    struct llvmpipe_screen *screen = CALLOC_STRUCT(llvmpipe_screen);
 269
 270 #ifdef DEBUG
 271    LP_DEBUG = debug_get_flags_option("LP_DEBUG", lp_debug_flags, 0 );
 272 #endif
 273
 274    if (!screen)
 275       return NULL;
 276
 277    screen->winsys = winsys;
 278
 279    screen->base.destroy = llvmpipe_destroy_screen;
 280
 281    screen->base.get_name = llvmpipe_get_name;
 282    screen->base.get_vendor = llvmpipe_get_vendor;
 283    screen->base.get_param = llvmpipe_get_param;
 284    screen->base.get_paramf = llvmpipe_get_paramf;
 285    screen->base.is_format_supported = llvmpipe_is_format_supported;
 286
 287    screen->base.context_create = llvmpipe_create_context;
 288    screen->base.flush_frontbuffer = llvmpipe_flush_frontbuffer;
 289
 290    util_format_s3tc_init();
 291
 292    llvmpipe_init_screen_texture_funcs(&screen->base);
 293    llvmpipe_init_screen_buffer_funcs(&screen->base);
 294    llvmpipe_init_screen_fence_funcs(&screen->base);
 295
 296    lp_jit_screen_init(screen);
 297
 298    return &screen->base;
 299 }