src/gallium/drivers/i965/brw_pipe_shader.c

   1 /*
   2  Copyright (C) Intel Corp.  2006.  All Rights Reserved.
   3  Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
   4  develop this 3D driver.
   5
   6  Permission is hereby granted, free of charge, to any person obtaining
   7  a 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, sublicense, 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
  16  portions of the Software.
  17
  18  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  19  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  21  IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  22  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  23  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  24  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25
  26  **********************************************************************/
  27  /*
  28   * Authors:
  29   *   Keith Whitwell <keith@tungstengraphics.com>
  30   */
  31
  32 #include "brw_context.h"
  33 #include "brw_util.h"
  34 #include "brw_wm.h"
  35
  36
  37 /**
  38  * Determine if the given fragment program uses GLSL features such
  39  * as flow conditionals, loops, subroutines.
  40  * Some GLSL shaders may use these features, others might not.
  41  */
  42 GLboolean brw_wm_has_flow_control(const struct brw_fragment_shader *fp)
  43 {
  44     return (fp->info.insn_count[TGSI_OPCODE_ARL] > 0 ||
  45             fp->info.insn_count[TGSI_OPCODE_IF] > 0 ||
  46             fp->info.insn_count[TGSI_OPCODE_ENDIF] > 0 || /* redundant - IF */
  47             fp->info.insn_count[TGSI_OPCODE_CAL] > 0 ||
  48             fp->info.insn_count[TGSI_OPCODE_BRK] > 0 ||   /* redundant - BGNLOOP */
  49             fp->info.insn_count[TGSI_OPCODE_RET] > 0 ||   /* redundant - CAL */
  50             fp->info.insn_count[TGSI_OPCODE_BGNLOOP] > 0);
  51 }
  52
  53
  54
  55 static void brwBindProgram( struct brw_context *brw,
  56                             GLenum target,
  57                             struct gl_program *prog )
  58 {
  59    struct brw_context *brw = brw_context(ctx);
  60
  61    switch (target) {
  62    case GL_VERTEX_PROGRAM_ARB:
  63       brw->state.dirty.brw |= BRW_NEW_VERTEX_PROGRAM;
  64       break;
  65    case GL_FRAGMENT_PROGRAM_ARB:
  66       brw->state.dirty.brw |= BRW_NEW_FRAGMENT_PROGRAM;
  67       break;
  68    }
  69 }
  70
  71 static struct gl_program *brwNewProgram( structg brw_context *brw,
  72                                       GLenum target,
  73                                       GLuint id )
  74 {
  75    struct brw_context *brw = brw_context(ctx);
  76
  77    switch (target) {
  78    case GL_VERTEX_PROGRAM_ARB: {
  79       struct brw_vertex_program *prog = CALLOC_STRUCT(brw_vertex_program);
  80       if (prog) {
  81          prog->id = brw->program_id++;
  82
  83          return _mesa_init_vertex_program( ctx, &prog->program,
  84                                              target, id );
  85       }
  86       else
  87          return NULL;
  88    }
  89
  90    case GL_FRAGMENT_PROGRAM_ARB: {
  91       struct brw_fragment_program *prog = CALLOC_STRUCT(brw_fragment_program);
  92       if (prog) {
  93          prog->id = brw->program_id++;
  94
  95          return _mesa_init_fragment_program( ctx, &prog->program,
  96                                              target, id );
  97       }
  98       else
  99          return NULL;
 100    }
 101
 102    default:
 103       return _mesa_new_program(ctx, target, id);
 104    }
 105 }
 106
 107 static void brwDeleteProgram( struct brw_context *brw,
 108                               struct gl_program *prog )
 109 {
 110    if (prog->Target == GL_FRAGMENT_PROGRAM_ARB) {
 111       struct gl_fragment_program *fprog = (struct gl_fragment_program *) prog;
 112       struct brw_fragment_program *brw_fprog = brw_fragment_program(fprog);
 113       brw->sws->bo_unreference(brw_fprog->const_buffer);
 114    }
 115
 116    _mesa_delete_program( ctx, prog );
 117 }
 118
 119
 120 static GLboolean brwIsProgramNative( struct brw_context *brw,
 121                                      GLenum target,
 122                                      struct gl_program *prog )
 123 {
 124    return GL_TRUE;
 125 }
 126
 127 static void brwProgramStringNotify( struct brw_context *brw,
 128                                     GLenum target,
 129                                     struct gl_program *prog )
 130 {
 131    struct brw_context *brw = brw_context(ctx);
 132
 133    if (target == GL_FRAGMENT_PROGRAM_ARB) {
 134       struct gl_fragment_program *fprog = (struct gl_fragment_program *) prog;
 135       struct brw_fragment_program *newFP = brw_fragment_program(fprog);
 136       const struct brw_fragment_program *curFP =
 137          brw_fragment_program_const(brw->fragment_program);
 138
 139       if (fprog->FogOption) {
 140          _mesa_append_fog_code(ctx, fprog);
 141          fprog->FogOption = GL_NONE;
 142       }
 143
 144       if (newFP == curFP)
 145          brw->state.dirty.brw |= BRW_NEW_FRAGMENT_PROGRAM;
 146       newFP->id = brw->program_id++;
 147       newFP->has_flow_control = brw_wm_has_flow_control(fprog);
 148    }
 149    else if (target == GL_VERTEX_PROGRAM_ARB) {
 150       struct gl_vertex_program *vprog = (struct gl_vertex_program *) prog;
 151       struct brw_vertex_program *newVP = brw_vertex_program(vprog);
 152       const struct brw_vertex_program *curVP =
 153          brw_vertex_program_const(brw->vertex_program);
 154
 155       if (newVP == curVP)
 156          brw->state.dirty.brw |= BRW_NEW_VERTEX_PROGRAM;
 157       if (newVP->program.IsPositionInvariant) {
 158          _mesa_insert_mvp_code(ctx, &newVP->program);
 159       }
 160       newVP->id = brw->program_id++;
 161
 162       /* Also tell tnl about it:
 163        */
 164       _tnl_program_string(ctx, target, prog);
 165    }
 166 }
 167
 168 void brwInitFragProgFuncs( struct dd_function_table *functions )
 169 {
 170    assert(functions->ProgramStringNotify == _tnl_program_string);
 171
 172    functions->BindProgram = brwBindProgram;
 173    functions->NewProgram = brwNewProgram;
 174    functions->DeleteProgram = brwDeleteProgram;
 175    functions->IsProgramNative = brwIsProgramNative;
 176    functions->ProgramStringNotify = brwProgramStringNotify;
 177 }
 178