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_winsys.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_winsys *ws = st->pipe->winsys;
  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 = params->StateFlags;
  69
  70       _mesa_load_state_parameters(st->ctx, params);
  71
  72       if (!cbuf->buffer)
  73          cbuf->buffer = ws->buffer_create(ws, 1, 0, 0);
  74
  75       if (0)
  76       {
  77          printf("%s(shader=%d, numParams=%d, stateFlags=0x%x)\n",
  78                 __FUNCTION__, id, params->NumParameters, params->StateFlags);
  79          _mesa_print_parameter_list(params);
  80       }
  81
  82       /* load Mesa constants into the constant buffer */
  83       ws->buffer_data(ws, cbuf->buffer, paramBytes, params->ParameterValues,
  84                       PIPE_BUFFER_USAGE_CONSTANT);
  85
  86       cbuf->size = paramBytes;
  87
  88       st->pipe->set_constant_buffer(st->pipe, id, 0, cbuf);
  89    }
  90    else {
  91       st->constants.tracked_state[id].dirty.mesa = 0;
  92       //  st->pipe->set_constant_buffer(st->pipe, id, 0, NULL);
  93    }
  94 }
  95
  96 /* Vertex shader:
  97  */
  98 static void update_vs_constants(struct st_context *st )
  99 {
 100    struct st_vertex_program *vp = st->vp;
 101    struct gl_program_parameter_list *params = vp->Base.Base.Parameters;
 102
 103    st_upload_constants( st, params, PIPE_SHADER_VERTEX );
 104 }
 105
 106 const struct st_tracked_state st_update_vs_constants = {
 107    .name = "st_update_vs_constants",
 108    .dirty = {
 109       .mesa  = 0,
 110       .st   = ST_NEW_VERTEX_PROGRAM,
 111    },
 112    .update = update_vs_constants
 113 };
 114
 115 /* Fragment shader:
 116  */
 117 static void update_fs_constants(struct st_context *st )
 118 {
 119    struct st_fragment_program *fp = st->fp;
 120    struct gl_program_parameter_list *params = fp->Base.Base.Parameters;
 121
 122    st_upload_constants( st, params, PIPE_SHADER_FRAGMENT );
 123 }
 124
 125 const struct st_tracked_state st_update_fs_constants = {
 126    .name = "st_update_fs_constants",
 127    .dirty = {
 128       .mesa  = 0,
 129       .st   = ST_NEW_FRAGMENT_PROGRAM,
 130    },
 131    .update = update_fs_constants
 132 };
 133