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      1 /**************************************************************************
      2  *
      3  * Copyright 2007 VMware, Inc.
      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 VMWARE 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 #include "lp_context.h"
     29 #include "lp_state.h"
     30 #include "lp_texture.h"
     31 #include "lp_debug.h"
     32 
     33 #include "pipe/p_defines.h"
     34 #include "util/u_memory.h"
     35 #include "util/u_inlines.h"
     36 #include "draw/draw_context.h"
     37 #include "tgsi/tgsi_dump.h"
     38 #include "tgsi/tgsi_scan.h"
     39 #include "tgsi/tgsi_parse.h"
     40 
     41 
     42 static void *
     43 llvmpipe_create_gs_state(struct pipe_context *pipe,
     44                          const struct pipe_shader_state *templ)
     45 {
     46    struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
     47    struct lp_geometry_shader *state;
     48 
     49    state = CALLOC_STRUCT(lp_geometry_shader);
     50    if (!state)
     51       goto no_state;
     52 
     53    /* debug */
     54    if (LP_DEBUG & DEBUG_TGSI) {
     55       debug_printf("llvmpipe: Create geometry shader %p:\n", (void *)state);
     56       tgsi_dump(templ->tokens, 0);
     57    }
     58 
     59    /* copy stream output info */
     60    state->no_tokens = !templ->tokens;
     61    memcpy(&state->stream_output, &templ->stream_output, sizeof state->stream_output);
     62 
     63    if (templ->tokens) {
     64       state->dgs = draw_create_geometry_shader(llvmpipe->draw, templ);
     65       if (state->dgs == NULL) {
     66          goto no_dgs;
     67       }
     68    }
     69 
     70    return state;
     71 
     72 no_dgs:
     73    FREE( state );
     74 no_state:
     75    return NULL;
     76 }
     77 
     78 
     79 static void
     80 llvmpipe_bind_gs_state(struct pipe_context *pipe, void *gs)
     81 {
     82    struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
     83 
     84    llvmpipe->gs = (struct lp_geometry_shader *)gs;
     85 
     86    draw_bind_geometry_shader(llvmpipe->draw,
     87                              (llvmpipe->gs ? llvmpipe->gs->dgs : NULL));
     88 
     89    llvmpipe->dirty |= LP_NEW_GS;
     90 }
     91 
     92 
     93 static void
     94 llvmpipe_delete_gs_state(struct pipe_context *pipe, void *gs)
     95 {
     96    struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
     97 
     98    struct lp_geometry_shader *state =
     99       (struct lp_geometry_shader *)gs;
    100 
    101    if (!state) {
    102       return;
    103    }
    104 
    105    draw_delete_geometry_shader(llvmpipe->draw, state->dgs);
    106    FREE(state);
    107 }
    108 
    109 
    110 void
    111 llvmpipe_init_gs_funcs(struct llvmpipe_context *llvmpipe)
    112 {
    113    llvmpipe->pipe.create_gs_state = llvmpipe_create_gs_state;
    114    llvmpipe->pipe.bind_gs_state   = llvmpipe_bind_gs_state;
    115    llvmpipe->pipe.delete_gs_state = llvmpipe_delete_gs_state;
    116 }
    117