src/mesa/drivers/dri/i965/brw_program.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 "main/imports.h"
  33 #include "main/enums.h"
  34 #include "main/shaderobj.h"
  35 #include "program/prog_parameter.h"
  36 #include "program/program.h"
  37 #include "program/programopt.h"
  38 #include "tnl/tnl.h"
  39
  40 #include "brw_context.h"
  41 #include "brw_wm.h"
  42
  43 static void brwBindProgram( GLcontext *ctx,
  44                             GLenum target,
  45                             struct gl_program *prog )
  46 {
  47    struct brw_context *brw = brw_context(ctx);
  48
  49    switch (target) {
  50    case GL_VERTEX_PROGRAM_ARB:
  51       brw->state.dirty.brw |= BRW_NEW_VERTEX_PROGRAM;
  52       break;
  53    case GL_FRAGMENT_PROGRAM_ARB:
  54       brw->state.dirty.brw |= BRW_NEW_FRAGMENT_PROGRAM;
  55       break;
  56    }
  57 }
  58
  59 static struct gl_program *brwNewProgram( GLcontext *ctx,
  60                                       GLenum target,
  61                                       GLuint id )
  62 {
  63    struct brw_context *brw = brw_context(ctx);
  64
  65    switch (target) {
  66    case GL_VERTEX_PROGRAM_ARB: {
  67       struct brw_vertex_program *prog = CALLOC_STRUCT(brw_vertex_program);
  68       if (prog) {
  69          prog->id = brw->program_id++;
  70
  71          return _mesa_init_vertex_program( ctx, &prog->program,
  72                                              target, id );
  73       }
  74       else
  75          return NULL;
  76    }
  77
  78    case GL_FRAGMENT_PROGRAM_ARB: {
  79       struct brw_fragment_program *prog = CALLOC_STRUCT(brw_fragment_program);
  80       if (prog) {
  81          prog->id = brw->program_id++;
  82
  83          return _mesa_init_fragment_program( ctx, &prog->program,
  84                                              target, id );
  85       }
  86       else
  87          return NULL;
  88    }
  89
  90    default:
  91       return _mesa_new_program(ctx, target, id);
  92    }
  93 }
  94
  95 static void brwDeleteProgram( GLcontext *ctx,
  96                               struct gl_program *prog )
  97 {
  98    _mesa_delete_program( ctx, prog );
  99 }
 100
 101
 102 static GLboolean brwIsProgramNative( GLcontext *ctx,
 103                                      GLenum target,
 104                                      struct gl_program *prog )
 105 {
 106    return GL_TRUE;
 107 }
 108
 109 static void
 110 shader_error(GLcontext *ctx, struct gl_program *prog, const char *msg)
 111 {
 112    struct gl_shader_program *shader;
 113
 114    shader = _mesa_lookup_shader_program(ctx, prog->Id);
 115
 116    if (shader) {
 117       if (shader->InfoLog) {
 118          free(shader->InfoLog);
 119       }
 120       shader->InfoLog = _mesa_strdup(msg);
 121       shader->LinkStatus = GL_FALSE;
 122    }
 123 }
 124
 125 static GLboolean brwProgramStringNotify( GLcontext *ctx,
 126                                          GLenum target,
 127                                          struct gl_program *prog )
 128 {
 129    struct brw_context *brw = brw_context(ctx);
 130    int i;
 131
 132    if (target == GL_FRAGMENT_PROGRAM_ARB) {
 133       struct gl_fragment_program *fprog = (struct gl_fragment_program *) prog;
 134       struct brw_fragment_program *newFP = brw_fragment_program(fprog);
 135       const struct brw_fragment_program *curFP =
 136          brw_fragment_program_const(brw->fragment_program);
 137
 138       if (fprog->FogOption) {
 139          _mesa_append_fog_code(ctx, fprog);
 140          fprog->FogOption = GL_NONE;
 141       }
 142
 143       if (newFP == curFP)
 144          brw->state.dirty.brw |= BRW_NEW_FRAGMENT_PROGRAM;
 145       newFP->id = brw->program_id++;
 146       newFP->isGLSL = brw_wm_is_glsl(fprog);
 147    }
 148    else if (target == GL_VERTEX_PROGRAM_ARB) {
 149       struct gl_vertex_program *vprog = (struct gl_vertex_program *) prog;
 150       struct brw_vertex_program *newVP = brw_vertex_program(vprog);
 151       const struct brw_vertex_program *curVP =
 152          brw_vertex_program_const(brw->vertex_program);
 153
 154       if (newVP == curVP)
 155          brw->state.dirty.brw |= BRW_NEW_VERTEX_PROGRAM;
 156       if (newVP->program.IsPositionInvariant) {
 157          _mesa_insert_mvp_code(ctx, &newVP->program);
 158       }
 159       newVP->id = brw->program_id++;
 160
 161       /* Also tell tnl about it:
 162        */
 163       _tnl_program_string(ctx, target, prog);
 164    }
 165
 166    /* Reject programs with subroutines, which are totally broken at the moment
 167     * (all program flows return when any program flow returns, and
 168     * the VS also hangs if a function call calls a function.
 169     *
 170     * See piglit glsl-{vs,fs}-functions-[23] tests.
 171     */
 172    for (i = 0; i < prog->NumInstructions; i++) {
 173       if (prog->Instructions[i].Opcode == OPCODE_CAL) {
 174          shader_error(ctx, prog,
 175                       "i965 driver doesn't yet support uninlined function "
 176                       "calls.  Move to using a single return statement at "
 177                       "the end of the function to work around it.");
 178          return GL_FALSE;
 179       }
 180    }
 181
 182    return GL_TRUE;
 183 }
 184
 185 void brwInitFragProgFuncs( struct dd_function_table *functions )
 186 {
 187    assert(functions->ProgramStringNotify == _tnl_program_string);
 188
 189    functions->BindProgram = brwBindProgram;
 190    functions->NewProgram = brwNewProgram;
 191    functions->DeleteProgram = brwDeleteProgram;
 192    functions->IsProgramNative = brwIsProgramNative;
 193    functions->ProgramStringNotify = brwProgramStringNotify;
 194 }
 195