2 * Copyright 2014, 2015 Red Hat.
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * on the rights to use, copy, modify, merge, publish, distribute, sub
8 * license, and/or sell copies of the Software, and to permit persons to whom
9 * the Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
21 * USE OR OTHER DEALINGS IN THE SOFTWARE.
23 #include "util/u_memory.h"
24 #include "util/u_format.h"
25 #include "util/u_format_s3tc.h"
26 #include "util/u_video.h"
27 #include "os/os_time.h"
28 #include "pipe/p_defines.h"
29 #include "pipe/p_screen.h"
30 #include "draw/draw_context.h"
32 #include "tgsi/tgsi_exec.h"
34 #include "virgl_screen.h"
35 #include "virgl_resource.h"
36 #include "virgl_public.h"
37 #include "virgl_context.h"
39 #define SP_MAX_TEXTURE_2D_LEVELS 15 /* 16K x 16K */
40 #define SP_MAX_TEXTURE_3D_LEVELS 9 /* 512 x 512 x 512 */
41 #define SP_MAX_TEXTURE_CUBE_LEVELS 13 /* 4K x 4K */
44 virgl_get_vendor(struct pipe_screen *screen)
51 virgl_get_name(struct pipe_screen *screen)
57 virgl_get_param(struct pipe_screen *screen, enum pipe_cap param)
59 struct virgl_screen *vscreen = virgl_screen(screen);
61 case PIPE_CAP_NPOT_TEXTURES:
63 case PIPE_CAP_TWO_SIDED_STENCIL:
67 case PIPE_CAP_ANISOTROPIC_FILTER:
69 case PIPE_CAP_POINT_SPRITE:
71 case PIPE_CAP_MAX_RENDER_TARGETS:
72 return vscreen->caps.caps.v1.max_render_targets;
73 case PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS:
74 return vscreen->caps.caps.v1.max_dual_source_render_targets;
75 case PIPE_CAP_OCCLUSION_QUERY:
76 return vscreen->caps.caps.v1.bset.occlusion_query;
77 case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
78 return vscreen->caps.caps.v1.bset.mirror_clamp;
79 case PIPE_CAP_TEXTURE_SHADOW_MAP:
81 case PIPE_CAP_TEXTURE_SWIZZLE:
83 case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
84 return SP_MAX_TEXTURE_2D_LEVELS;
85 case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
86 return SP_MAX_TEXTURE_3D_LEVELS;
87 case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
88 return SP_MAX_TEXTURE_CUBE_LEVELS;
89 case PIPE_CAP_BLEND_EQUATION_SEPARATE:
91 case PIPE_CAP_INDEP_BLEND_ENABLE:
92 return vscreen->caps.caps.v1.bset.indep_blend_enable;
93 case PIPE_CAP_INDEP_BLEND_FUNC:
94 return vscreen->caps.caps.v1.bset.indep_blend_func;
95 case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
96 case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
97 case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
98 case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
99 return vscreen->caps.caps.v1.bset.fragment_coord_conventions;
100 case PIPE_CAP_DEPTH_CLIP_DISABLE:
101 return vscreen->caps.caps.v1.bset.depth_clip_disable;
102 case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
103 return vscreen->caps.caps.v1.max_streamout_buffers;
104 case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS:
105 case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:
107 case PIPE_CAP_PRIMITIVE_RESTART:
108 return vscreen->caps.caps.v1.bset.primitive_restart;
109 case PIPE_CAP_SHADER_STENCIL_EXPORT:
110 return vscreen->caps.caps.v1.bset.shader_stencil_export;
111 case PIPE_CAP_TGSI_INSTANCEID:
112 case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
114 case PIPE_CAP_SEAMLESS_CUBE_MAP:
115 return vscreen->caps.caps.v1.bset.seamless_cube_map;
116 case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE:
117 return vscreen->caps.caps.v1.bset.seamless_cube_map_per_texture;
118 case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
119 return vscreen->caps.caps.v1.max_texture_array_layers;
120 case PIPE_CAP_MIN_TEXEL_OFFSET:
121 case PIPE_CAP_MIN_TEXTURE_GATHER_OFFSET:
123 case PIPE_CAP_MAX_TEXEL_OFFSET:
124 case PIPE_CAP_MAX_TEXTURE_GATHER_OFFSET:
126 case PIPE_CAP_CONDITIONAL_RENDER:
127 return vscreen->caps.caps.v1.bset.conditional_render;
128 case PIPE_CAP_TEXTURE_BARRIER:
130 case PIPE_CAP_VERTEX_COLOR_UNCLAMPED:
132 case PIPE_CAP_FRAGMENT_COLOR_CLAMPED:
133 case PIPE_CAP_VERTEX_COLOR_CLAMPED:
134 return vscreen->caps.caps.v1.bset.color_clamping;
135 case PIPE_CAP_MIXED_COLORBUFFER_FORMATS:
137 case PIPE_CAP_GLSL_FEATURE_LEVEL:
138 return vscreen->caps.caps.v1.glsl_level;
139 case PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION:
141 case PIPE_CAP_COMPUTE:
143 case PIPE_CAP_USER_VERTEX_BUFFERS:
145 case PIPE_CAP_USER_CONSTANT_BUFFERS:
147 case PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT:
149 case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
150 case PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS:
151 return vscreen->caps.caps.v1.bset.streamout_pause_resume;
152 case PIPE_CAP_START_INSTANCE:
153 return vscreen->caps.caps.v1.bset.start_instance;
154 case PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS:
155 case PIPE_CAP_VERTEX_BUFFER_OFFSET_4BYTE_ALIGNED_ONLY:
156 case PIPE_CAP_VERTEX_BUFFER_STRIDE_4BYTE_ALIGNED_ONLY:
157 case PIPE_CAP_VERTEX_ELEMENT_SRC_OFFSET_4BYTE_ALIGNED_ONLY:
158 case PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER:
160 case PIPE_CAP_QUERY_TIMESTAMP:
162 case PIPE_CAP_QUERY_TIME_ELAPSED:
164 case PIPE_CAP_TGSI_TEXCOORD:
166 case PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT:
167 return VIRGL_MAP_BUFFER_ALIGNMENT;
168 case PIPE_CAP_TEXTURE_BUFFER_OBJECTS:
169 return vscreen->caps.caps.v1.max_tbo_size > 0;
170 case PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT:
172 case PIPE_CAP_BUFFER_SAMPLER_VIEW_RGBA_ONLY:
174 case PIPE_CAP_CUBE_MAP_ARRAY:
175 return vscreen->caps.caps.v1.bset.cube_map_array;
176 case PIPE_CAP_TEXTURE_MULTISAMPLE:
177 return vscreen->caps.caps.v1.bset.texture_multisample;
178 case PIPE_CAP_MAX_VIEWPORTS:
179 return vscreen->caps.caps.v1.max_viewports;
180 case PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE:
181 return vscreen->caps.caps.v1.max_tbo_size;
182 case PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK:
183 case PIPE_CAP_QUERY_PIPELINE_STATISTICS:
184 case PIPE_CAP_ENDIANNESS:
186 case PIPE_CAP_MIXED_FRAMEBUFFER_SIZES:
187 case PIPE_CAP_MIXED_COLOR_DEPTH_BITS:
189 case PIPE_CAP_TGSI_VS_LAYER_VIEWPORT:
191 case PIPE_CAP_MAX_GEOMETRY_OUTPUT_VERTICES:
193 case PIPE_CAP_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS:
195 case PIPE_CAP_TEXTURE_QUERY_LOD:
196 return vscreen->caps.caps.v1.bset.texture_query_lod;
197 case PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS:
198 return vscreen->caps.caps.v1.max_texture_gather_components;
199 case PIPE_CAP_TEXTURE_GATHER_SM5:
200 case PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT:
201 case PIPE_CAP_SAMPLE_SHADING:
202 case PIPE_CAP_FAKE_SW_MSAA:
203 case PIPE_CAP_TEXTURE_GATHER_OFFSETS:
204 case PIPE_CAP_TGSI_VS_WINDOW_SPACE_POSITION:
205 case PIPE_CAP_MAX_VERTEX_STREAMS:
206 case PIPE_CAP_DRAW_INDIRECT:
207 case PIPE_CAP_MULTI_DRAW_INDIRECT:
208 case PIPE_CAP_MULTI_DRAW_INDIRECT_PARAMS:
209 case PIPE_CAP_TGSI_FS_FINE_DERIVATIVE:
210 case PIPE_CAP_CONDITIONAL_RENDER_INVERTED:
211 case PIPE_CAP_MAX_VERTEX_ATTRIB_STRIDE:
212 case PIPE_CAP_SAMPLER_VIEW_TARGET:
213 case PIPE_CAP_CLIP_HALFZ:
214 case PIPE_CAP_VERTEXID_NOBASE:
215 case PIPE_CAP_POLYGON_OFFSET_CLAMP:
216 case PIPE_CAP_MULTISAMPLE_Z_RESOLVE:
217 case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
218 case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
219 case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
220 case PIPE_CAP_TEXTURE_FLOAT_LINEAR:
221 case PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR:
222 case PIPE_CAP_DEPTH_BOUNDS_TEST:
223 case PIPE_CAP_TGSI_TXQS:
224 case PIPE_CAP_FORCE_PERSAMPLE_INTERP:
225 case PIPE_CAP_SHAREABLE_SHADERS:
226 case PIPE_CAP_CLEAR_TEXTURE:
227 case PIPE_CAP_DRAW_PARAMETERS:
228 case PIPE_CAP_TGSI_PACK_HALF_FLOAT:
229 case PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL:
230 case PIPE_CAP_TGSI_FS_FACE_IS_INTEGER_SYSVAL:
231 case PIPE_CAP_SHADER_BUFFER_OFFSET_ALIGNMENT:
232 case PIPE_CAP_INVALIDATE_BUFFER:
233 case PIPE_CAP_GENERATE_MIPMAP:
234 case PIPE_CAP_SURFACE_REINTERPRET_BLOCKS:
235 case PIPE_CAP_QUERY_BUFFER_OBJECT:
236 case PIPE_CAP_COPY_BETWEEN_COMPRESSED_AND_PLAIN_FORMATS:
237 case PIPE_CAP_STRING_MARKER:
238 case PIPE_CAP_QUERY_MEMORY_INFO:
239 case PIPE_CAP_PCI_GROUP:
240 case PIPE_CAP_PCI_BUS:
241 case PIPE_CAP_PCI_DEVICE:
242 case PIPE_CAP_PCI_FUNCTION:
243 case PIPE_CAP_FRAMEBUFFER_NO_ATTACHMENT:
244 case PIPE_CAP_ROBUST_BUFFER_ACCESS_BEHAVIOR:
245 case PIPE_CAP_CULL_DISTANCE:
246 case PIPE_CAP_PRIMITIVE_RESTART_FOR_PATCHES:
247 case PIPE_CAP_TGSI_VOTE:
248 case PIPE_CAP_MAX_WINDOW_RECTANGLES:
249 case PIPE_CAP_POLYGON_OFFSET_UNITS_UNSCALED:
250 case PIPE_CAP_VIEWPORT_SUBPIXEL_BITS:
251 case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
252 case PIPE_CAP_TGSI_CAN_READ_OUTPUTS:
253 case PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY:
254 case PIPE_CAP_TGSI_FS_FBFETCH:
255 case PIPE_CAP_TGSI_MUL_ZERO_WINS:
257 case PIPE_CAP_INT64_DIVMOD:
258 case PIPE_CAP_TGSI_TEX_TXF_LZ:
259 case PIPE_CAP_TGSI_CLOCK:
261 case PIPE_CAP_VENDOR_ID:
263 case PIPE_CAP_DEVICE_ID:
265 case PIPE_CAP_ACCELERATED:
268 case PIPE_CAP_VIDEO_MEMORY:
270 case PIPE_CAP_NATIVE_FENCE_FD:
273 /* should only get here on unhandled cases */
274 debug_printf("Unexpected PIPE_CAP %d query\n", param);
279 virgl_get_shader_param(struct pipe_screen *screen,
280 enum pipe_shader_type shader,
281 enum pipe_shader_cap param)
283 struct virgl_screen *vscreen = virgl_screen(screen);
286 case PIPE_SHADER_FRAGMENT:
287 case PIPE_SHADER_VERTEX:
288 case PIPE_SHADER_GEOMETRY:
290 case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
291 case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
292 case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
293 case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
295 case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
296 case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
297 case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
299 case PIPE_SHADER_CAP_MAX_INPUTS:
300 if (vscreen->caps.caps.v1.glsl_level < 150)
302 return (shader == PIPE_SHADER_VERTEX ||
303 shader == PIPE_SHADER_GEOMETRY) ? 16 : 32;
304 case PIPE_SHADER_CAP_MAX_OUTPUTS:
306 // case PIPE_SHADER_CAP_MAX_CONSTS:
308 case PIPE_SHADER_CAP_MAX_TEMPS:
310 case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
311 return vscreen->caps.caps.v1.max_uniform_blocks;
312 // case PIPE_SHADER_CAP_MAX_ADDRS:
314 case PIPE_SHADER_CAP_MAX_PREDS:
316 case PIPE_SHADER_CAP_SUBROUTINES:
318 case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
320 case PIPE_SHADER_CAP_INTEGERS:
321 return vscreen->caps.caps.v1.glsl_level >= 130;
322 case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
324 case PIPE_SHADER_CAP_MAX_CONST_BUFFER_SIZE:
325 return 4096 * sizeof(float[4]);
326 case PIPE_SHADER_CAP_LOWER_IF_THRESHOLD:
336 virgl_get_paramf(struct pipe_screen *screen, enum pipe_capf param)
339 case PIPE_CAPF_MAX_LINE_WIDTH:
341 case PIPE_CAPF_MAX_LINE_WIDTH_AA:
342 return 255.0; /* arbitrary */
343 case PIPE_CAPF_MAX_POINT_WIDTH:
345 case PIPE_CAPF_MAX_POINT_WIDTH_AA:
346 return 255.0; /* arbitrary */
347 case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
349 case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
350 return 16.0; /* arbitrary */
351 case PIPE_CAPF_GUARD_BAND_LEFT:
352 case PIPE_CAPF_GUARD_BAND_TOP:
353 case PIPE_CAPF_GUARD_BAND_RIGHT:
354 case PIPE_CAPF_GUARD_BAND_BOTTOM:
357 /* should only get here on unhandled cases */
358 debug_printf("Unexpected PIPE_CAPF %d query\n", param);
363 virgl_is_vertex_format_supported(struct pipe_screen *screen,
364 enum pipe_format format)
366 struct virgl_screen *vscreen = virgl_screen(screen);
367 const struct util_format_description *format_desc;
370 format_desc = util_format_description(format);
374 if (format == PIPE_FORMAT_R11G11B10_FLOAT) {
375 int vformat = VIRGL_FORMAT_R11G11B10_FLOAT;
376 int big = vformat / 32;
377 int small = vformat % 32;
378 if (!(vscreen->caps.caps.v1.vertexbuffer.bitmask[big] & (1 << small)))
383 /* Find the first non-VOID channel. */
384 for (i = 0; i < 4; i++) {
385 if (format_desc->channel[i].type != UTIL_FORMAT_TYPE_VOID) {
393 if (format_desc->layout != UTIL_FORMAT_LAYOUT_PLAIN)
396 if (format_desc->channel[i].type == UTIL_FORMAT_TYPE_FIXED)
402 * Query format support for creating a texture, drawing surface, etc.
403 * \param format the format to test
404 * \param type one of PIPE_TEXTURE, PIPE_SURFACE
407 virgl_is_format_supported( struct pipe_screen *screen,
408 enum pipe_format format,
409 enum pipe_texture_target target,
410 unsigned sample_count,
413 struct virgl_screen *vscreen = virgl_screen(screen);
414 const struct util_format_description *format_desc;
417 assert(target == PIPE_BUFFER ||
418 target == PIPE_TEXTURE_1D ||
419 target == PIPE_TEXTURE_1D_ARRAY ||
420 target == PIPE_TEXTURE_2D ||
421 target == PIPE_TEXTURE_2D_ARRAY ||
422 target == PIPE_TEXTURE_RECT ||
423 target == PIPE_TEXTURE_3D ||
424 target == PIPE_TEXTURE_CUBE ||
425 target == PIPE_TEXTURE_CUBE_ARRAY);
427 format_desc = util_format_description(format);
431 if (util_format_is_intensity(format))
434 if (sample_count > 1) {
435 if (!vscreen->caps.caps.v1.bset.texture_multisample)
437 if (sample_count > vscreen->caps.caps.v1.max_samples)
441 if (bind & PIPE_BIND_VERTEX_BUFFER) {
442 return virgl_is_vertex_format_supported(screen, format);
445 if (bind & PIPE_BIND_RENDER_TARGET) {
446 if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS)
450 * Although possible, it is unnatural to render into compressed or YUV
451 * surfaces. So disable these here to avoid going into weird paths
452 * inside the state trackers.
454 if (format_desc->block.width != 1 ||
455 format_desc->block.height != 1)
459 int big = format / 32;
460 int small = format % 32;
461 if (!(vscreen->caps.caps.v1.render.bitmask[big] & (1 << small)))
466 if (bind & PIPE_BIND_DEPTH_STENCIL) {
467 if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
472 * All other operations (sampling, transfer, etc).
475 if (format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
476 if (util_format_s3tc_enabled)
480 if (format_desc->layout == UTIL_FORMAT_LAYOUT_RGTC) {
484 if (format == PIPE_FORMAT_R11G11B10_FLOAT) {
486 } else if (format == PIPE_FORMAT_R9G9B9E5_FLOAT) {
490 /* Find the first non-VOID channel. */
491 for (i = 0; i < 4; i++) {
492 if (format_desc->channel[i].type != UTIL_FORMAT_TYPE_VOID) {
501 if (format_desc->nr_channels < 4 && format_desc->channel[i].size == 4)
506 int big = format / 32;
507 int small = format % 32;
508 if (!(vscreen->caps.caps.v1.sampler.bitmask[big] & (1 << small)))
512 * Everything else should be supported by u_format.
517 static void virgl_flush_frontbuffer(struct pipe_screen *screen,
518 struct pipe_resource *res,
519 unsigned level, unsigned layer,
520 void *winsys_drawable_handle, struct pipe_box *sub_box)
522 struct virgl_screen *vscreen = virgl_screen(screen);
523 struct virgl_winsys *vws = vscreen->vws;
524 struct virgl_resource *vres = virgl_resource(res);
526 if (vws->flush_frontbuffer)
527 vws->flush_frontbuffer(vws, vres->hw_res, level, layer, winsys_drawable_handle,
531 static void virgl_fence_reference(struct pipe_screen *screen,
532 struct pipe_fence_handle **ptr,
533 struct pipe_fence_handle *fence)
535 struct virgl_screen *vscreen = virgl_screen(screen);
536 struct virgl_winsys *vws = vscreen->vws;
538 vws->fence_reference(vws, ptr, fence);
541 static boolean virgl_fence_finish(struct pipe_screen *screen,
542 struct pipe_context *ctx,
543 struct pipe_fence_handle *fence,
546 struct virgl_screen *vscreen = virgl_screen(screen);
547 struct virgl_winsys *vws = vscreen->vws;
549 return vws->fence_wait(vws, fence, timeout);
553 virgl_get_timestamp(struct pipe_screen *_screen)
555 return os_time_get_nano();
559 virgl_destroy_screen(struct pipe_screen *screen)
561 struct virgl_screen *vscreen = virgl_screen(screen);
562 struct virgl_winsys *vws = vscreen->vws;
564 slab_destroy_parent(&vscreen->texture_transfer_pool);
572 virgl_create_screen(struct virgl_winsys *vws)
574 struct virgl_screen *screen = CALLOC_STRUCT(virgl_screen);
580 screen->base.get_name = virgl_get_name;
581 screen->base.get_vendor = virgl_get_vendor;
582 screen->base.get_param = virgl_get_param;
583 screen->base.get_shader_param = virgl_get_shader_param;
584 screen->base.get_paramf = virgl_get_paramf;
585 screen->base.is_format_supported = virgl_is_format_supported;
586 screen->base.destroy = virgl_destroy_screen;
587 screen->base.context_create = virgl_context_create;
588 screen->base.flush_frontbuffer = virgl_flush_frontbuffer;
589 screen->base.get_timestamp = virgl_get_timestamp;
590 screen->base.fence_reference = virgl_fence_reference;
591 //screen->base.fence_signalled = virgl_fence_signalled;
592 screen->base.fence_finish = virgl_fence_finish;
594 virgl_init_screen_resource_functions(&screen->base);
596 vws->get_caps(vws, &screen->caps);
600 slab_create_parent(&screen->texture_transfer_pool, sizeof(struct virgl_transfer), 16);
602 util_format_s3tc_init();
603 return &screen->base;