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 /*
  29  * Authors:
  30  *   Keith Whitwell <keith@tungstengraphics.com>
  31  *   Brian Paul
  32  */
  33
  34 #include "main/imports.h"
  35 #include "shader/prog_parameter.h"
  36 #include "shader/prog_print.h"
  37
  38 #include "pipe/p_context.h"
  39 #include "pipe/p_defines.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 #include "st_inlines.h"
  47
  48
  49 /**
  50  * Pass the given program parameters to the graphics pipe as a
  51  * constant buffer.
  52  * \param shader_type  either PIPE_SHADER_VERTEX or PIPE_SHADER_FRAGMENT
  53  */
  54 void st_upload_constants( struct st_context *st,
  55                           struct gl_program_parameter_list *params,
  56                           unsigned shader_type)
  57 {
  58    struct pipe_context *pipe = st->pipe;
  59    struct pipe_constant_buffer *cbuf = &st->state.constants[shader_type];
  60
  61    assert(shader_type == PIPE_SHADER_VERTEX ||
  62           shader_type == PIPE_SHADER_FRAGMENT);
  63
  64    /* update constants */
  65    if (params && params->NumParameters) {
  66       const uint paramBytes = params->NumParameters * sizeof(GLfloat) * 4;
  67
  68       _mesa_load_state_parameters(st->ctx, params);
  69
  70       /* We always need to get a new buffer, to keep the drivers simple and
  71        * avoid gratuitous rendering synchronization.
  72        */
  73       pipe_buffer_reference(&cbuf->buffer, NULL );
  74       cbuf->buffer = pipe_buffer_create(pipe->screen, 16,
  75                                         PIPE_BUFFER_USAGE_CONSTANT,
  76                                         paramBytes );
  77
  78       if (0) {
  79          debug_printf("%s(shader=%d, numParams=%d, stateFlags=0x%x)\n",
  80                       __FUNCTION__, shader_type, params->NumParameters,
  81                       params->StateFlags);
  82          _mesa_print_parameter_list(params);
  83       }
  84
  85       /* load Mesa constants into the constant buffer */
  86       if (cbuf->buffer)
  87          st_no_flush_pipe_buffer_write(st, cbuf->buffer,
  88                                        0, paramBytes,
  89                                        params->ParameterValues);
  90
  91       st->pipe->set_constant_buffer(st->pipe, shader_type, 0, cbuf);
  92    }
  93    else {
  94       st->constants.tracked_state[shader_type].dirty.mesa = 0x0;
  95    }
  96 }
  97
  98
  99 /**
 100  * Vertex shader:
 101  */
 102 static void update_vs_constants(struct st_context *st )
 103 {
 104    struct st_vertex_program *vp = st->vp;
 105    struct gl_program_parameter_list *params = vp->Base.Base.Parameters;
 106
 107    st_upload_constants( st, params, PIPE_SHADER_VERTEX );
 108 }
 109
 110
 111 const struct st_tracked_state st_update_vs_constants = {
 112    "st_update_vs_constants",                            /* name */
 113    {                                                    /* dirty */
 114       (_NEW_PROGRAM | _NEW_PROGRAM_CONSTANTS),          /* mesa */
 115       ST_NEW_VERTEX_PROGRAM,                            /* st */
 116    },
 117    update_vs_constants                                  /* update */
 118 };
 119
 120
 121
 122 /**
 123  * Fragment shader:
 124  */
 125 static void update_fs_constants(struct st_context *st )
 126 {
 127    struct st_fragment_program *fp = st->fp;
 128    struct gl_program_parameter_list *params = fp->Base.Base.Parameters;
 129
 130    st_upload_constants( st, params, PIPE_SHADER_FRAGMENT );
 131 }
 132
 133
 134 const struct st_tracked_state st_update_fs_constants = {
 135    "st_update_fs_constants",                            /* name */
 136    {                                                    /* dirty */
 137       (_NEW_PROGRAM | _NEW_PROGRAM_CONSTANTS),          /* mesa */
 138       ST_NEW_FRAGMENT_PROGRAM,                          /* st */
 139    },
 140    update_fs_constants                                  /* update */
 141 };
 142