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      1 /**********************************************************
      2  * Copyright 2008-2009 VMware, Inc.  All rights reserved.
      3  *
      4  * Permission is hereby granted, free of charge, to any person
      5  * obtaining a copy of this software and associated documentation
      6  * files (the "Software"), to deal in the Software without
      7  * restriction, including without limitation the rights to use, copy,
      8  * modify, merge, publish, distribute, sublicense, and/or sell copies
      9  * of the Software, and to permit persons to whom the Software is
     10  * furnished to do so, subject to the following conditions:
     11  *
     12  * The above copyright notice and this permission notice shall be
     13  * included in all copies or substantial portions of the Software.
     14  *
     15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
     16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
     18  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
     19  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
     20  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
     21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
     22  * SOFTWARE.
     23  *
     24  **********************************************************/
     25 
     26 #include "util/u_inlines.h"
     27 #include "pipe/p_defines.h"
     28 #include "util/u_math.h"
     29 #include "util/u_memory.h"
     30 #include "util/u_transfer.h"
     31 #include "tgsi/tgsi_parse.h"
     32 
     33 #include "svga_screen.h"
     34 #include "svga_resource_buffer.h"
     35 #include "svga_context.h"
     36 
     37 
     38 static void svga_set_vertex_buffers(struct pipe_context *pipe,
     39                                     unsigned count,
     40                                     const struct pipe_vertex_buffer *buffers)
     41 {
     42    struct svga_context *svga = svga_context(pipe);
     43    unsigned i;
     44    boolean any_user_buffer = FALSE;
     45 
     46    /* Check for no change */
     47    if (count == svga->curr.num_vertex_buffers &&
     48        memcmp(svga->curr.vb, buffers, count * sizeof buffers[0]) == 0)
     49       return;
     50 
     51    /* Adjust refcounts */
     52    for (i = 0; i < count; i++) {
     53       pipe_resource_reference(&svga->curr.vb[i].buffer, buffers[i].buffer);
     54       if (svga_buffer_is_user_buffer(buffers[i].buffer))
     55          any_user_buffer = TRUE;
     56    }
     57 
     58    for ( ; i < svga->curr.num_vertex_buffers; i++)
     59       pipe_resource_reference(&svga->curr.vb[i].buffer, NULL);
     60 
     61    /* Copy remaining data */
     62    memcpy(svga->curr.vb, buffers, count * sizeof buffers[0]);
     63    svga->curr.num_vertex_buffers = count;
     64    svga->curr.any_user_vertex_buffers = any_user_buffer;
     65 
     66    svga->dirty |= SVGA_NEW_VBUFFER;
     67 }
     68 
     69 
     70 static void svga_set_index_buffer(struct pipe_context *pipe,
     71                                   const struct pipe_index_buffer *ib)
     72 {
     73    struct svga_context *svga = svga_context(pipe);
     74 
     75    if (ib) {
     76       pipe_resource_reference(&svga->curr.ib.buffer, ib->buffer);
     77       memcpy(&svga->curr.ib, ib, sizeof(svga->curr.ib));
     78    }
     79    else {
     80       pipe_resource_reference(&svga->curr.ib.buffer, NULL);
     81       memset(&svga->curr.ib, 0, sizeof(svga->curr.ib));
     82    }
     83 
     84    /* TODO make this more like a state */
     85 }
     86 
     87 
     88 static void *
     89 svga_create_vertex_elements_state(struct pipe_context *pipe,
     90                                   unsigned count,
     91                                   const struct pipe_vertex_element *attribs)
     92 {
     93    struct svga_velems_state *velems;
     94    assert(count <= PIPE_MAX_ATTRIBS);
     95    velems = (struct svga_velems_state *) MALLOC(sizeof(struct svga_velems_state));
     96    if (velems) {
     97       velems->count = count;
     98       memcpy(velems->velem, attribs, sizeof(*attribs) * count);
     99    }
    100    return velems;
    101 }
    102 
    103 static void svga_bind_vertex_elements_state(struct pipe_context *pipe,
    104                                             void *velems)
    105 {
    106    struct svga_context *svga = svga_context(pipe);
    107    struct svga_velems_state *svga_velems = (struct svga_velems_state *) velems;
    108 
    109    svga->curr.velems = svga_velems;
    110    svga->dirty |= SVGA_NEW_VELEMENT;
    111 }
    112 
    113 static void svga_delete_vertex_elements_state(struct pipe_context *pipe,
    114                                               void *velems)
    115 {
    116    FREE(velems);
    117 }
    118 
    119 void svga_cleanup_vertex_state( struct svga_context *svga )
    120 {
    121    unsigned i;
    122 
    123    for (i = 0 ; i < svga->curr.num_vertex_buffers; i++)
    124       pipe_resource_reference(&svga->curr.vb[i].buffer, NULL);
    125 }
    126 
    127 
    128 void svga_init_vertex_functions( struct svga_context *svga )
    129 {
    130    svga->pipe.set_vertex_buffers = svga_set_vertex_buffers;
    131    svga->pipe.set_index_buffer = svga_set_index_buffer;
    132    svga->pipe.create_vertex_elements_state = svga_create_vertex_elements_state;
    133    svga->pipe.bind_vertex_elements_state = svga_bind_vertex_elements_state;
    134    svga->pipe.delete_vertex_elements_state = svga_delete_vertex_elements_state;
    135 }
    136 
    137 
    138