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 "program/prog_parameter.h"
  36 #include "program/prog_print.h"
  37
  38 #include "pipe/p_context.h"
  39 #include "pipe/p_defines.h"
  40 #include "util/u_inlines.h"
  41 #include "util/u_upload_mgr.h"
  42
  43 #include "st_debug.h"
  44 #include "st_context.h"
  45 #include "st_atom.h"
  46 #include "st_atom_constbuf.h"
  47 #include "st_program.h"
  48
  49
  50 /**
  51  * Pass the given program parameters to the graphics pipe as a
  52  * constant buffer.
  53  * \param shader_type  either PIPE_SHADER_VERTEX or PIPE_SHADER_FRAGMENT
  54  */
  55 void st_upload_constants( struct st_context *st,
  56                           struct gl_program_parameter_list *params,
  57                           unsigned shader_type)
  58 {
  59    assert(shader_type == PIPE_SHADER_VERTEX ||
  60           shader_type == PIPE_SHADER_FRAGMENT ||
  61           shader_type == PIPE_SHADER_GEOMETRY);
  62
  63    /* update constants */
  64    if (params && params->NumParameters) {
  65       struct pipe_constant_buffer cb;
  66       const uint paramBytes = params->NumParameters * sizeof(GLfloat) * 4;
  67
  68       /* Update the constants which come from fixed-function state, such as
  69        * transformation matrices, fog factors, etc.  The rest of the values in
  70        * the parameters list are explicitly set by the user with glUniform,
  71        * glProgramParameter(), etc.
  72        */
  73       _mesa_load_state_parameters(st->ctx, params);
  74
  75       /* We always need to get a new buffer, to keep the drivers simple and
  76        * avoid gratuitous rendering synchronization.
  77        * Let's use a user buffer to avoid an unnecessary copy.
  78        */
  79       if (st->constbuf_uploader) {
  80          cb.buffer = NULL;
  81          cb.user_buffer = NULL;
  82          u_upload_data(st->constbuf_uploader, 0, paramBytes,
  83                        params->ParameterValues, &cb.buffer_offset, &cb.buffer);
  84          u_upload_unmap(st->constbuf_uploader);
  85       } else {
  86          cb.buffer = NULL;
  87          cb.user_buffer = params->ParameterValues;
  88          cb.buffer_offset = 0;
  89       }
  90       cb.buffer_size = paramBytes;
  91
  92       if (ST_DEBUG & DEBUG_CONSTANTS) {
  93          debug_printf("%s(shader=%d, numParams=%d, stateFlags=0x%x)\n",
  94                       __FUNCTION__, shader_type, params->NumParameters,
  95                       params->StateFlags);
  96          _mesa_print_parameter_list(params);
  97       }
  98
  99       st->pipe->set_constant_buffer(st->pipe, shader_type, 0, &cb);
 100       pipe_resource_reference(&cb.buffer, NULL);
 101
 102       st->state.constants[shader_type].ptr = params->ParameterValues;
 103       st->state.constants[shader_type].size = paramBytes;
 104    }
 105    else if (st->state.constants[shader_type].ptr) {
 106       st->state.constants[shader_type].ptr = NULL;
 107       st->state.constants[shader_type].size = 0;
 108       st->pipe->set_constant_buffer(st->pipe, shader_type, 0, NULL);
 109    }
 110 }
 111
 112
 113 /**
 114  * Vertex shader:
 115  */
 116 static void update_vs_constants(struct st_context *st )
 117 {
 118    struct st_vertex_program *vp = st->vp;
 119    struct gl_program_parameter_list *params = vp->Base.Base.Parameters;
 120
 121    st_upload_constants( st, params, PIPE_SHADER_VERTEX );
 122 }
 123
 124
 125 const struct st_tracked_state st_update_vs_constants = {
 126    "st_update_vs_constants",                            /* name */
 127    {                                                    /* dirty */
 128       (_NEW_PROGRAM | _NEW_PROGRAM_CONSTANTS),          /* mesa */
 129       ST_NEW_VERTEX_PROGRAM,                            /* st */
 130    },
 131    update_vs_constants                                  /* update */
 132 };
 133
 134
 135
 136 /**
 137  * Fragment shader:
 138  */
 139 static void update_fs_constants(struct st_context *st )
 140 {
 141    struct st_fragment_program *fp = st->fp;
 142    struct gl_program_parameter_list *params = fp->Base.Base.Parameters;
 143
 144    st_upload_constants( st, params, PIPE_SHADER_FRAGMENT );
 145 }
 146
 147
 148 const struct st_tracked_state st_update_fs_constants = {
 149    "st_update_fs_constants",                            /* name */
 150    {                                                    /* dirty */
 151       (_NEW_PROGRAM | _NEW_PROGRAM_CONSTANTS),          /* mesa */
 152       ST_NEW_FRAGMENT_PROGRAM,                          /* st */
 153    },
 154    update_fs_constants                                  /* update */
 155 };
 156
 157 /* Geometry shader:
 158  */
 159 static void update_gs_constants(struct st_context *st )
 160 {
 161    struct st_geometry_program *gp = st->gp;
 162    struct gl_program_parameter_list *params;
 163
 164    if (gp) {
 165       params = gp->Base.Base.Parameters;
 166       st_upload_constants( st, params, PIPE_SHADER_GEOMETRY );
 167    }
 168 }
 169
 170 const struct st_tracked_state st_update_gs_constants = {
 171    "st_update_gs_constants",                            /* name */
 172    {                                                    /* dirty */
 173       (_NEW_PROGRAM | _NEW_PROGRAM_CONSTANTS),          /* mesa */
 174       ST_NEW_GEOMETRY_PROGRAM,                          /* st */
 175    },
 176    update_gs_constants                                  /* update */
 177 };