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      1 /**************************************************************************
      2  *
      3  * Copyright 2007 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 /* Authors:  Keith Whitwell <keith (at) tungstengraphics.com>
     29  */
     30 
     31 
     32 #include "lp_context.h"
     33 #include "lp_state.h"
     34 
     35 #include "draw/draw_context.h"
     36 #include "util/u_inlines.h"
     37 #include "util/u_transfer.h"
     38 
     39 
     40 static void *
     41 llvmpipe_create_vertex_elements_state(struct pipe_context *pipe,
     42                                       unsigned count,
     43                                       const struct pipe_vertex_element *attribs)
     44 {
     45    struct lp_velems_state *velems;
     46    assert(count <= PIPE_MAX_ATTRIBS);
     47    velems = (struct lp_velems_state *) MALLOC(sizeof(struct lp_velems_state));
     48    if (velems) {
     49       velems->count = count;
     50       memcpy(velems->velem, attribs, sizeof(*attribs) * count);
     51    }
     52    return velems;
     53 }
     54 
     55 static void
     56 llvmpipe_bind_vertex_elements_state(struct pipe_context *pipe,
     57                                     void *velems)
     58 {
     59    struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
     60    struct lp_velems_state *lp_velems = (struct lp_velems_state *) velems;
     61 
     62    llvmpipe->velems = lp_velems;
     63 
     64    llvmpipe->dirty |= LP_NEW_VERTEX;
     65 
     66    if (velems)
     67       draw_set_vertex_elements(llvmpipe->draw, lp_velems->count, lp_velems->velem);
     68 }
     69 
     70 static void
     71 llvmpipe_delete_vertex_elements_state(struct pipe_context *pipe, void *velems)
     72 {
     73    FREE( velems );
     74 }
     75 
     76 static void
     77 llvmpipe_set_vertex_buffers(struct pipe_context *pipe,
     78                             unsigned count,
     79                             const struct pipe_vertex_buffer *buffers)
     80 {
     81    struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
     82 
     83    assert(count <= PIPE_MAX_ATTRIBS);
     84 
     85    util_copy_vertex_buffers(llvmpipe->vertex_buffer,
     86                             &llvmpipe->num_vertex_buffers,
     87                             buffers, count);
     88 
     89    llvmpipe->dirty |= LP_NEW_VERTEX;
     90 
     91    draw_set_vertex_buffers(llvmpipe->draw, count, buffers);
     92 }
     93 
     94 
     95 static void
     96 llvmpipe_set_index_buffer(struct pipe_context *pipe,
     97                           const struct pipe_index_buffer *ib)
     98 {
     99    struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
    100 
    101    if (ib)
    102       memcpy(&llvmpipe->index_buffer, ib, sizeof(llvmpipe->index_buffer));
    103    else
    104       memset(&llvmpipe->index_buffer, 0, sizeof(llvmpipe->index_buffer));
    105 }
    106 
    107 void
    108 llvmpipe_init_vertex_funcs(struct llvmpipe_context *llvmpipe)
    109 {
    110    llvmpipe->pipe.create_vertex_elements_state = llvmpipe_create_vertex_elements_state;
    111    llvmpipe->pipe.bind_vertex_elements_state = llvmpipe_bind_vertex_elements_state;
    112    llvmpipe->pipe.delete_vertex_elements_state = llvmpipe_delete_vertex_elements_state;
    113 
    114    llvmpipe->pipe.set_vertex_buffers = llvmpipe_set_vertex_buffers;
    115    llvmpipe->pipe.set_index_buffer = llvmpipe_set_index_buffer;
    116 }
    117