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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 "tgsi/tgsi_parse.h"
     30 
     31 #include "svga_context.h"
     32 #include "svga_resource_buffer.h"
     33 
     34 /***********************************************************************
     35  * Constant buffers
     36  */
     37 
     38 struct svga_constbuf
     39 {
     40    unsigned type;
     41    float (*data)[4];
     42    unsigned count;
     43 };
     44 
     45 
     46 
     47 static void svga_set_constant_buffer(struct pipe_context *pipe,
     48                                      uint shader, uint index,
     49                                      struct pipe_constant_buffer *cb)
     50 {
     51    struct svga_context *svga = svga_context(pipe);
     52    struct pipe_resource *buf = cb ? cb->buffer : NULL;
     53 
     54    if (cb && cb->user_buffer) {
     55       buf = svga_user_buffer_create(pipe->screen,
     56                                     (void *) cb->user_buffer,
     57                                     cb->buffer_size,
     58                                     PIPE_BIND_CONSTANT_BUFFER);
     59    }
     60 
     61    assert(shader < PIPE_SHADER_TYPES);
     62    assert(index == 0);
     63 
     64    pipe_resource_reference( &svga->curr.cb[shader],
     65                           buf );
     66 
     67    if (shader == PIPE_SHADER_FRAGMENT)
     68       svga->dirty |= SVGA_NEW_FS_CONST_BUFFER;
     69    else
     70       svga->dirty |= SVGA_NEW_VS_CONST_BUFFER;
     71 
     72    if (cb && cb->user_buffer) {
     73       pipe_resource_reference(&buf, NULL);
     74    }
     75 }
     76 
     77 
     78 
     79 void svga_init_constbuffer_functions( struct svga_context *svga )
     80 {
     81    svga->pipe.set_constant_buffer = svga_set_constant_buffer;
     82 }
     83 
     84