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  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.    struct pipe_resource **cbuf = &st->state.constants[shader_type];
  60.  
  61.    assert(shader_type == PIPE_SHADER_VERTEX ||
  62.           shader_type == PIPE_SHADER_FRAGMENT ||
  63.           shader_type == PIPE_SHADER_GEOMETRY);
  64.  
  65.    /* update constants */
  66.    if (params && params->NumParameters) {
  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.        */
  79.       pipe_resource_reference(cbuf, NULL );
  80.       *cbuf = pipe_buffer_create(pipe->screen,
  81.                                  PIPE_BIND_CONSTANT_BUFFER,
  82.                                  paramBytes );
  83.  
  84.       if (ST_DEBUG & DEBUG_CONSTANTS) {
  85.          debug_printf("%s(shader=%d, numParams=%d, stateFlags=0x%x)\n",
  86.                       __FUNCTION__, shader_type, params->NumParameters,
  87.                       params->StateFlags);
  88.          _mesa_print_parameter_list(params);
  89.       }
  90.  
  91.       /* load Mesa constants into the constant buffer */
  92.       pipe_buffer_write(st->pipe, *cbuf,
  93.                                     0, paramBytes,
  94.                                     params->ParameterValues);
  95.  
  96.       st->pipe->set_constant_buffer(st->pipe, shader_type, 0, *cbuf);
  97.    }
  98.    else if (*cbuf) {
  99.       st->constants.tracked_state[shader_type].dirty.mesa = 0x0;
  100.  
  101.       pipe_resource_reference(cbuf, NULL);
  102.       st->pipe->set_constant_buffer(st->pipe, shader_type, 0, NULL);
  103.    }
  104. }
  105.  
  106.  
  107. /**
  108.  * Vertex shader:
  109.  */
  110. static void update_vs_constants(struct st_context *st )
  111. {
  112.    struct st_vertex_program *vp = st->vp;
  113.    struct gl_program_parameter_list *params = vp->Base.Base.Parameters;
  114.  
  115.    st_upload_constants( st, params, PIPE_SHADER_VERTEX );
  116. }
  117.  
  118.  
  119. const struct st_tracked_state st_update_vs_constants = {
  120.    "st_update_vs_constants",                            /* name */
  121.    {                                                    /* dirty */
  122.       (_NEW_PROGRAM | _NEW_PROGRAM_CONSTANTS),          /* mesa */
  123.       ST_NEW_VERTEX_PROGRAM,                            /* st */
  124.    },
  125.    update_vs_constants                                  /* update */
  126. };
  127.  
  128.  
  129.  
  130. /**
  131.  * Fragment shader:
  132.  */
  133. static void update_fs_constants(struct st_context *st )
  134. {
  135.    struct st_fragment_program *fp = st->fp;
  136.    struct gl_program_parameter_list *params = fp->Base.Base.Parameters;
  137.  
  138.    st_upload_constants( st, params, PIPE_SHADER_FRAGMENT );
  139. }
  140.  
  141.  
  142. const struct st_tracked_state st_update_fs_constants = {
  143.    "st_update_fs_constants",                            /* name */
  144.    {                                                    /* dirty */
  145.       (_NEW_PROGRAM | _NEW_PROGRAM_CONSTANTS),          /* mesa */
  146.       ST_NEW_FRAGMENT_PROGRAM,                          /* st */
  147.    },
  148.    update_fs_constants                                  /* update */
  149. };
  150.  
  151. /* Geometry shader:
  152.  */
  153. static void update_gs_constants(struct st_context *st )
  154. {
  155.    struct st_geometry_program *gp = st->gp;
  156.    struct gl_program_parameter_list *params;
  157.  
  158.    if (gp) {
  159.       params = gp->Base.Base.Parameters;
  160.       st_upload_constants( st, params, PIPE_SHADER_GEOMETRY );
  161.    }
  162. }
  163.  
  164. const struct st_tracked_state st_update_gs_constants = {
  165.    "st_update_gs_constants",                            /* name */
  166.    {                                                    /* dirty */
  167.       (_NEW_PROGRAM | _NEW_PROGRAM_CONSTANTS),          /* mesa */
  168.       ST_NEW_GEOMETRY_PROGRAM,                          /* st */
  169.    },
  170.    update_gs_constants                                  /* update */
  171. };
  172.