Home | History | Annotate | Download | only in svga
      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                                      enum pipe_shader_type shader, uint index,
     49                                      const struct pipe_constant_buffer *cb)
     50 {
     51    struct svga_screen *svgascreen = svga_screen(pipe->screen);
     52    struct svga_context *svga = svga_context(pipe);
     53    struct pipe_resource *buf = cb ? cb->buffer : NULL;
     54    unsigned buffer_size = 0;
     55 
     56    if (cb) {
     57       buffer_size = cb->buffer_size;
     58       if (cb->user_buffer) {
     59          buf = svga_user_buffer_create(pipe->screen,
     60                                        (void *) cb->user_buffer,
     61                                        cb->buffer_size,
     62                                        PIPE_BIND_CONSTANT_BUFFER);
     63       }
     64    }
     65 
     66    assert(shader < PIPE_SHADER_TYPES);
     67    assert(index < ARRAY_SIZE(svga->curr.constbufs[shader]));
     68    assert(index < svgascreen->max_const_buffers);
     69    (void) svgascreen;
     70 
     71    pipe_resource_reference(&svga->curr.constbufs[shader][index].buffer, buf);
     72 
     73    /* Make sure the constant buffer size to be updated is within the
     74     * limit supported by the device.
     75     */
     76    svga->curr.constbufs[shader][index].buffer_size =
     77       MIN2(buffer_size, SVGA_MAX_CONST_BUF_SIZE);
     78 
     79    svga->curr.constbufs[shader][index].buffer_offset = cb ? cb->buffer_offset : 0;
     80    svga->curr.constbufs[shader][index].user_buffer = NULL; /* not used */
     81 
     82    if (shader == PIPE_SHADER_FRAGMENT)
     83       svga->dirty |= SVGA_NEW_FS_CONST_BUFFER;
     84    else if (shader == PIPE_SHADER_VERTEX)
     85       svga->dirty |= SVGA_NEW_VS_CONST_BUFFER;
     86    else
     87       svga->dirty |= SVGA_NEW_GS_CONST_BUFFER;
     88 
     89    /* update bitmask of dirty const buffers */
     90    svga->state.dirty_constbufs[shader] |= (1 << index);
     91 
     92    if (cb && cb->user_buffer) {
     93       pipe_resource_reference(&buf, NULL);
     94    }
     95 }
     96 
     97 
     98 
     99 void svga_init_constbuffer_functions( struct svga_context *svga )
    100 {
    101    svga->pipe.set_constant_buffer = svga_set_constant_buffer;
    102 }
    103 
    104