src/gallium/drivers/virgl/virgl_tgsi.c

   1 /*
   2  * Copyright 2014, 2015 Red Hat.
   3  *
   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:
  10  *
  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
  13  * Software.
  14  *
  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.
  22  */
  23
  24 /* the virgl hw tgsi vs what the current gallium want will diverge over time.
  25    so add a transform stage to remove things we don't want to send unless
  26    the receiver supports it.
  27 */
  28 #include "tgsi/tgsi_transform.h"
  29 #include "virgl_context.h"
  30 struct virgl_transform_context {
  31    struct tgsi_transform_context base;
  32 };
  33
  34 /* for now just strip out the new properties the remote doesn't understand
  35    yet */
  36 static void
  37 virgl_tgsi_transform_property(struct tgsi_transform_context *ctx,
  38                               struct tgsi_full_property *prop)
  39 {
  40    switch (prop->Property.PropertyName) {
  41    case TGSI_PROPERTY_NUM_CLIPDIST_ENABLED:
  42    case TGSI_PROPERTY_NUM_CULLDIST_ENABLED:
  43    case TGSI_PROPERTY_NEXT_SHADER:
  44       break;
  45    default:
  46       ctx->emit_property(ctx, prop);
  47       break;
  48    }
  49 }
  50
  51 struct tgsi_token *virgl_tgsi_transform(const struct tgsi_token *tokens_in)
  52 {
  53
  54    struct virgl_transform_context transform;
  55    const uint newLen = tgsi_num_tokens(tokens_in);
  56    struct tgsi_token *new_tokens;
  57
  58    new_tokens = tgsi_alloc_tokens(newLen);
  59    if (!new_tokens)
  60       return NULL;
  61
  62    memset(&transform, 0, sizeof(transform));
  63    transform.base.transform_property = virgl_tgsi_transform_property;
  64    tgsi_transform_shader(tokens_in, new_tokens, newLen, &transform.base);
  65
  66    return new_tokens;
  67 }