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 "pipe/p_defines.h"
  32 #include "pipe/p_screen.h"
  33
  34 #include "lp_texture.h"
  35 #include "lp_buffer.h"
  36 #include "lp_winsys.h"
  37 #include "lp_jit.h"
  38 #include "lp_screen.h"
  39 #include "lp_debug.h"
  40
  41 #ifdef DEBUG
  42 int LP_DEBUG = 0;
  43
  44 static const struct debug_named_value lp_debug_flags[] = {
  45    { "pipe",   DEBUG_PIPE },
  46    { "tgsi",   DEBUG_TGSI },
  47    { "tex",    DEBUG_TEX },
  48    { "asm",    DEBUG_ASM },
  49    { "setup",  DEBUG_SETUP },
  50    { "rast",   DEBUG_RAST },
  51    { "query",  DEBUG_QUERY },
  52    { "screen", DEBUG_SCREEN },
  53    { "jit",    DEBUG_JIT },
  54    {NULL, 0}
  55 };
  56 #endif
  57
  58
  59 static const char *
  60 llvmpipe_get_vendor(struct pipe_screen *screen)
  61 {
  62    return "VMware, Inc.";
  63 }
  64
  65
  66 static const char *
  67 llvmpipe_get_name(struct pipe_screen *screen)
  68 {
  69    return "llvmpipe";
  70 }
  71
  72
  73 static int
  74 llvmpipe_get_param(struct pipe_screen *screen, int param)
  75 {
  76    switch (param) {
  77    case PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS:
  78       return PIPE_MAX_SAMPLERS;
  79    case PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS:
  80       return PIPE_MAX_VERTEX_SAMPLERS;
  81    case PIPE_CAP_MAX_COMBINED_SAMPLERS:
  82       return PIPE_MAX_SAMPLERS + PIPE_MAX_VERTEX_SAMPLERS;
  83    case PIPE_CAP_NPOT_TEXTURES:
  84       return 1;
  85    case PIPE_CAP_TWO_SIDED_STENCIL:
  86       return 1;
  87    case PIPE_CAP_GLSL:
  88       return 1;
  89    case PIPE_CAP_ANISOTROPIC_FILTER:
  90       return 0;
  91    case PIPE_CAP_POINT_SPRITE:
  92       return 1;
  93    case PIPE_CAP_MAX_RENDER_TARGETS:
  94       return PIPE_MAX_COLOR_BUFS;
  95    case PIPE_CAP_OCCLUSION_QUERY:
  96       return 1;
  97    case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
  98       return 1;
  99    case PIPE_CAP_TEXTURE_MIRROR_REPEAT:
 100       return 1;
 101    case PIPE_CAP_TEXTURE_SHADOW_MAP:
 102       return 1;
 103    case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
 104       return 13; /* max 4Kx4K */
 105    case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
 106       return 9;  /* max 256x256x256 */
 107    case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 108       return 13; /* max 4Kx4K */
 109    case PIPE_CAP_TGSI_CONT_SUPPORTED:
 110       return 1;
 111    case PIPE_CAP_BLEND_EQUATION_SEPARATE:
 112       return 1;
 113    case PIPE_CAP_INDEP_BLEND_ENABLE:
 114       return 0;
 115    case PIPE_CAP_INDEP_BLEND_FUNC:
 116       return 0;
 117    default:
 118       return 0;
 119    }
 120 }
 121
 122
 123 static float
 124 llvmpipe_get_paramf(struct pipe_screen *screen, int param)
 125 {
 126    switch (param) {
 127    case PIPE_CAP_MAX_LINE_WIDTH:
 128       /* fall-through */
 129    case PIPE_CAP_MAX_LINE_WIDTH_AA:
 130       return 255.0; /* arbitrary */
 131    case PIPE_CAP_MAX_POINT_WIDTH:
 132       /* fall-through */
 133    case PIPE_CAP_MAX_POINT_WIDTH_AA:
 134       return 255.0; /* arbitrary */
 135    case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
 136       return 16.0; /* not actually signficant at this time */
 137    case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
 138       return 16.0; /* arbitrary */
 139    default:
 140       return 0;
 141    }
 142 }
 143
 144
 145 /**
 146  * Query format support for creating a texture, drawing surface, etc.
 147  * \param format  the format to test
 148  * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
 149  */
 150 static boolean
 151 llvmpipe_is_format_supported( struct pipe_screen *_screen,
 152                               enum pipe_format format,
 153                               enum pipe_texture_target target,
 154                               unsigned tex_usage,
 155                               unsigned geom_flags )
 156 {
 157    struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
 158    struct llvmpipe_winsys *winsys = screen->winsys;
 159    const struct util_format_description *format_desc;
 160
 161    format_desc = util_format_description(format);
 162    if(!format_desc)
 163       return FALSE;
 164
 165    assert(target == PIPE_TEXTURE_1D ||
 166           target == PIPE_TEXTURE_2D ||
 167           target == PIPE_TEXTURE_3D ||
 168           target == PIPE_TEXTURE_CUBE);
 169
 170    switch(format) {
 171    case PIPE_FORMAT_DXT1_RGB:
 172    case PIPE_FORMAT_DXT1_RGBA:
 173    case PIPE_FORMAT_DXT3_RGBA:
 174    case PIPE_FORMAT_DXT5_RGBA:
 175       return FALSE;
 176    default:
 177       break;
 178    }
 179
 180    if(tex_usage & PIPE_TEXTURE_USAGE_RENDER_TARGET) {
 181       if(format_desc->block.width != 1 ||
 182          format_desc->block.height != 1)
 183          return FALSE;
 184
 185       if(format_desc->layout != UTIL_FORMAT_LAYOUT_SCALAR &&
 186          format_desc->layout != UTIL_FORMAT_LAYOUT_ARITH &&
 187          format_desc->layout != UTIL_FORMAT_LAYOUT_ARRAY)
 188          return FALSE;
 189
 190       if(format_desc->colorspace != UTIL_FORMAT_COLORSPACE_RGB &&
 191          format_desc->colorspace != UTIL_FORMAT_COLORSPACE_SRGB)
 192          return FALSE;
 193    }
 194
 195    if(tex_usage & PIPE_TEXTURE_USAGE_DISPLAY_TARGET) {
 196       if(!winsys->is_displaytarget_format_supported(winsys, format))
 197          return FALSE;
 198    }
 199
 200    if(tex_usage & PIPE_TEXTURE_USAGE_DEPTH_STENCIL) {
 201       if(format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
 202          return FALSE;
 203
 204       /* FIXME: Temporary restriction. See lp_state_fs.c. */
 205       if(format_desc->block.bits != 32)
 206          return FALSE;
 207    }
 208
 209    /* FIXME: Temporary restrictions. See lp_bld_sample_soa.c */
 210    if(tex_usage & PIPE_TEXTURE_USAGE_SAMPLER) {
 211       if(format_desc->block.width != 1 ||
 212          format_desc->block.height != 1)
 213          return FALSE;
 214
 215       if(format_desc->layout != UTIL_FORMAT_LAYOUT_SCALAR &&
 216          format_desc->layout != UTIL_FORMAT_LAYOUT_ARITH &&
 217          format_desc->layout != UTIL_FORMAT_LAYOUT_ARRAY)
 218          return FALSE;
 219
 220       if(format_desc->colorspace != UTIL_FORMAT_COLORSPACE_RGB &&
 221          format_desc->colorspace != UTIL_FORMAT_COLORSPACE_SRGB &&
 222          format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
 223          return FALSE;
 224    }
 225
 226    return TRUE;
 227 }
 228
 229
 230 static struct pipe_buffer *
 231 llvmpipe_surface_buffer_create(struct pipe_screen *screen,
 232                                unsigned width, unsigned height,
 233                                enum pipe_format format,
 234                                unsigned tex_usage,
 235                                unsigned usage,
 236                                unsigned *stride)
 237 {
 238    /* This function should never be used */
 239    assert(0);
 240    return NULL;
 241 }
 242
 243
 244 static void
 245 llvmpipe_flush_frontbuffer(struct pipe_screen *_screen,
 246                            struct pipe_surface *surface,
 247                            void *context_private)
 248 {
 249    struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
 250    struct llvmpipe_winsys *winsys = screen->winsys;
 251    struct llvmpipe_texture *texture = llvmpipe_texture(surface->texture);
 252
 253    assert(texture->dt);
 254    if (texture->dt)
 255       winsys->displaytarget_display(winsys, texture->dt, context_private);
 256 }
 257
 258
 259 static void
 260 llvmpipe_destroy_screen( struct pipe_screen *_screen )
 261 {
 262    struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
 263    struct llvmpipe_winsys *winsys = screen->winsys;
 264
 265    lp_jit_screen_cleanup(screen);
 266
 267    if(winsys->destroy)
 268       winsys->destroy(winsys);
 269
 270    FREE(screen);
 271 }
 272
 273
 274
 275 /**
 276  * Create a new pipe_screen object
 277  * Note: we're not presently subclassing pipe_screen (no llvmpipe_screen).
 278  */
 279 struct pipe_screen *
 280 llvmpipe_create_screen(struct llvmpipe_winsys *winsys)
 281 {
 282    struct llvmpipe_screen *screen = CALLOC_STRUCT(llvmpipe_screen);
 283
 284 #ifdef DEBUG
 285    LP_DEBUG = debug_get_flags_option("LP_DEBUG", lp_debug_flags, 0 );
 286 #endif
 287
 288    if (!screen)
 289       return NULL;
 290
 291    screen->winsys = winsys;
 292
 293    screen->base.destroy = llvmpipe_destroy_screen;
 294
 295    screen->base.get_name = llvmpipe_get_name;
 296    screen->base.get_vendor = llvmpipe_get_vendor;
 297    screen->base.get_param = llvmpipe_get_param;
 298    screen->base.get_paramf = llvmpipe_get_paramf;
 299    screen->base.is_format_supported = llvmpipe_is_format_supported;
 300
 301    screen->base.surface_buffer_create = llvmpipe_surface_buffer_create;
 302    screen->base.flush_frontbuffer = llvmpipe_flush_frontbuffer;
 303
 304    llvmpipe_init_screen_texture_funcs(&screen->base);
 305    llvmpipe_init_screen_buffer_funcs(&screen->base);
 306
 307    lp_jit_screen_init(screen);
 308
 309    return &screen->base;
 310 }