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