src/mesa/state_tracker/st_atom_constbuf.c

   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:
  29   *   Keith Whitwell <keith@tungstengraphics.com>
  30   *   Brian Paul
  31   */
  32
  33 #include "main/imports.h"
  34 #include "shader/prog_parameter.h"
  35 #include "shader/prog_print.h"
  36
  37 #include "pipe/p_context.h"
  38 #include "pipe/p_defines.h"
  39 #include "pipe/p_inlines.h"
  40
  41 #include "st_context.h"
  42 #include "st_atom.h"
  43 #include "st_atom_constbuf.h"
  44 #include "st_program.h"
  45
  46
  47 /**
  48  * Pass the given program parameters to the graphics pipe as a
  49  * constant buffer.
  50  * \param id  either PIPE_SHADER_VERTEX or PIPE_SHADER_FRAGMENT
  51  */
  52 void st_upload_constants( struct st_context *st,
  53                           struct gl_program_parameter_list *params,
  54                           unsigned id)
  55 {
  56    struct pipe_context *pipe = st->pipe;
  57    struct pipe_constant_buffer *cbuf = &st->state.constants[id];
  58
  59    assert(id == PIPE_SHADER_VERTEX || id == PIPE_SHADER_FRAGMENT);
  60
  61    /* update constants */
  62    if (params && params->NumParameters) {
  63       const uint paramBytes = params->NumParameters * sizeof(GLfloat) * 4;
  64
  65       /* Update our own dependency flags.  This works because this
  66        * function will also be called whenever the program changes.
  67        */
  68       st->constants.tracked_state[id].dirty.mesa =
  69          (params->StateFlags | _NEW_PROGRAM);
  70
  71       _mesa_load_state_parameters(st->ctx, params);
  72
  73       /* We always need to get a new buffer, to keep the drivers simple and
  74        * avoid gratuitous rendering synchronization.
  75        */
  76       pipe_buffer_reference(pipe->screen, &cbuf->buffer, NULL );
  77       cbuf->buffer = pipe_buffer_create(pipe->screen, 16, PIPE_BUFFER_USAGE_CONSTANT,
  78                                         paramBytes );
  79
  80       if (0)
  81       {
  82          printf("%s(shader=%d, numParams=%d, stateFlags=0x%x)\n",
  83                 __FUNCTION__, id, params->NumParameters, params->StateFlags);
  84          _mesa_print_parameter_list(params);
  85       }
  86
  87       /* load Mesa constants into the constant buffer */
  88       if (cbuf->buffer) {
  89          void *map = pipe_buffer_map(pipe->screen, cbuf->buffer,
  90                                      PIPE_BUFFER_USAGE_CPU_WRITE);
  91          memcpy(map, params->ParameterValues, paramBytes);
  92          pipe_buffer_unmap(pipe->screen, cbuf->buffer);
  93       }
  94
  95       cbuf->size = paramBytes;
  96
  97       st->pipe->set_constant_buffer(st->pipe, id, 0, cbuf);
  98    }
  99    else {
 100       st->constants.tracked_state[id].dirty.mesa = 0;
 101       //  st->pipe->set_constant_buffer(st->pipe, id, 0, NULL);
 102    }
 103 }
 104
 105 /* Vertex shader:
 106  */
 107 static void update_vs_constants(struct st_context *st )
 108 {
 109    struct st_vertex_program *vp = st->vp;
 110    struct gl_program_parameter_list *params = vp->Base.Base.Parameters;
 111
 112    st_upload_constants( st, params, PIPE_SHADER_VERTEX );
 113 }
 114
 115 const struct st_tracked_state st_update_vs_constants = {
 116    "st_update_vs_constants",                            /* name */
 117    {                                                    /* dirty */
 118       0,  /* set dynamically above */                   /* mesa */
 119       ST_NEW_VERTEX_PROGRAM,                            /* st */
 120    },
 121    update_vs_constants                                  /* update */
 122 };
 123
 124 /* Fragment shader:
 125  */
 126 static void update_fs_constants(struct st_context *st )
 127 {
 128    struct st_fragment_program *fp = st->fp;
 129    struct gl_program_parameter_list *params = fp->Base.Base.Parameters;
 130
 131    st_upload_constants( st, params, PIPE_SHADER_FRAGMENT );
 132 }
 133
 134 const struct st_tracked_state st_update_fs_constants = {
 135    "st_update_fs_constants",                            /* name */
 136    {                                                    /* dirty */
 137       0,  /* set dynamically above */                   /* mesa */
 138       ST_NEW_FRAGMENT_PROGRAM,                          /* st */
 139    },
 140    update_fs_constants                                  /* update */
 141 };
 142