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 #include "pipe/p_inlines.h"
  41
  42 #include "st_context.h"
  43 #include "st_atom.h"
  44 #include "st_atom_constbuf.h"
  45 #include "st_program.h"
  46
  47
  48 /**
  49  * Pass the given program parameters to the graphics pipe as a
  50  * constant buffer.
  51  * \param id  either PIPE_SHADER_VERTEX or PIPE_SHADER_FRAGMENT
  52  */
  53 void st_upload_constants( struct st_context *st,
  54                           struct gl_program_parameter_list *params,
  55                           unsigned id)
  56 {
  57    struct pipe_winsys *ws = st->pipe->winsys;
  58    struct pipe_constant_buffer *cbuf = &st->state.constants[id];
  59
  60    assert(id == PIPE_SHADER_VERTEX || id == PIPE_SHADER_FRAGMENT);
  61
  62    /* update constants */
  63    if (params && params->NumParameters) {
  64       const uint paramBytes = params->NumParameters * sizeof(GLfloat) * 4;
  65
  66       /* Update our own dependency flags.  This works because this
  67        * function will also be called whenever the program changes.
  68        */
  69       st->constants.tracked_state[id].dirty.mesa = params->StateFlags;
  70
  71       _mesa_load_state_parameters(st->ctx, params);
  72
  73       if (cbuf->buffer && cbuf->size != paramBytes)
  74          pipe_buffer_reference( ws, &cbuf->buffer, NULL );
  75
  76       if (!cbuf->buffer) {
  77          cbuf->buffer = ws->buffer_create(ws, 1, PIPE_BUFFER_USAGE_CONSTANT,
  78                                           paramBytes);
  79       }
  80
  81       if (0)
  82       {
  83          printf("%s(shader=%d, numParams=%d, stateFlags=0x%x)\n",
  84                 __FUNCTION__, id, params->NumParameters, params->StateFlags);
  85          _mesa_print_parameter_list(params);
  86       }
  87
  88       /* load Mesa constants into the constant buffer */
  89       if (cbuf->buffer) {
  90          memcpy(ws->buffer_map(ws, cbuf->buffer, PIPE_BUFFER_USAGE_CPU_WRITE),
  91                 params->ParameterValues, paramBytes);
  92          ws->buffer_unmap(ws, 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    .name = "st_update_vs_constants",
 117    .dirty = {
 118       .mesa  = 0,
 119       .st   = ST_NEW_VERTEX_PROGRAM,
 120    },
 121    .update = update_vs_constants
 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    .name = "st_update_fs_constants",
 136    .dirty = {
 137       .mesa  = 0,
 138       .st   = ST_NEW_FRAGMENT_PROGRAM,
 139    },
 140    .update = update_fs_constants
 141 };
 142