Home | History | Annotate | Download | only in virgl 
      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 static void
     35 virgl_tgsi_transform_declaration(struct tgsi_transform_context *ctx,
     36                                  struct tgsi_full_declaration *decl)
     37 {
     38    switch (decl->Declaration.File) {
     39    case TGSI_FILE_CONSTANT:
     40       if (decl->Declaration.Dimension) {
     41          if (decl->Dim.Index2D == 0)
     42             decl->Declaration.Dimension = 0;
     43       }
     44       break;
     45    default:
     46       break;
     47    }
     48    ctx->emit_declaration(ctx, decl);
     49 
     50 }
     51 
     52 /* for now just strip out the new properties the remote doesn't understand
     53    yet */
     54 static void
     55 virgl_tgsi_transform_property(struct tgsi_transform_context *ctx,
     56                               struct tgsi_full_property *prop)
     57 {
     58    switch (prop->Property.PropertyName) {
     59    case TGSI_PROPERTY_NUM_CLIPDIST_ENABLED:
     60    case TGSI_PROPERTY_NUM_CULLDIST_ENABLED:
     61    case TGSI_PROPERTY_NEXT_SHADER:
     62       break;
     63    default:
     64       ctx->emit_property(ctx, prop);
     65       break;
     66    }
     67 }
     68 
     69 static void
     70 virgl_tgsi_transform_instruction(struct tgsi_transform_context *ctx,
     71 				 struct tgsi_full_instruction *inst)
     72 {
     73    if (inst->Instruction.Precise)
     74       inst->Instruction.Precise = 0;
     75 
     76    for (unsigned i = 0; i < inst->Instruction.NumSrcRegs; i++) {
     77       if (inst->Src[i].Register.File == TGSI_FILE_CONSTANT &&
     78           inst->Src[i].Register.Dimension &&
     79           inst->Src[i].Dimension.Index == 0)
     80          inst->Src[i].Register.Dimension = 0;
     81    }
     82    ctx->emit_instruction(ctx, inst);
     83 }
     84 
     85 struct tgsi_token *virgl_tgsi_transform(const struct tgsi_token *tokens_in)
     86 {
     87 
     88    struct virgl_transform_context transform;
     89    const uint newLen = tgsi_num_tokens(tokens_in);
     90    struct tgsi_token *new_tokens;
     91 
     92    new_tokens = tgsi_alloc_tokens(newLen);
     93    if (!new_tokens)
     94       return NULL;
     95 
     96    memset(&transform, 0, sizeof(transform));
     97    transform.base.transform_declaration = virgl_tgsi_transform_declaration;
     98    transform.base.transform_property = virgl_tgsi_transform_property;
     99    transform.base.transform_instruction = virgl_tgsi_transform_instruction;
    100    tgsi_transform_shader(tokens_in, new_tokens, newLen, &transform.base);
    101 
    102    return new_tokens;
    103 }
    104