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