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