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 "shader/prog_parameter.h"
  35 #include "shader/program.h"
  36 #include "shader/programopt.h"
  37 #include "shader/shader_api.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    if (prog->Target == GL_FRAGMENT_PROGRAM_ARB) {
  99       struct gl_fragment_program *fp = (struct gl_fragment_program *) prog;
 100       struct brw_fragment_program *brw_fp = brw_fragment_program(fp);
 101
 102       dri_bo_unreference(brw_fp->const_buffer);
 103    }
 104
 105    if (prog->Target == GL_VERTEX_PROGRAM_ARB) {
 106       struct gl_vertex_program *vp = (struct gl_vertex_program *) prog;
 107       struct brw_vertex_program *brw_vp = brw_vertex_program(vp);
 108
 109       dri_bo_unreference(brw_vp->const_buffer);
 110    }
 111
 112    _mesa_delete_program( ctx, prog );
 113 }
 114
 115
 116 static GLboolean brwIsProgramNative( GLcontext *ctx,
 117                                      GLenum target,
 118                                      struct gl_program *prog )
 119 {
 120    return GL_TRUE;
 121 }
 122
 123 static void
 124 shader_error(GLcontext *ctx, struct gl_program *prog, const char *msg)
 125 {
 126    struct gl_shader_program *shader;
 127
 128    shader = _mesa_lookup_shader_program(ctx, prog->Id);
 129
 130    if (shader) {
 131       if (shader->InfoLog) {
 132          free(shader->InfoLog);
 133       }
 134       shader->InfoLog = _mesa_strdup(msg);
 135       shader->LinkStatus = GL_FALSE;
 136    }
 137 }
 138
 139 static GLboolean brwProgramStringNotify( GLcontext *ctx,
 140                                          GLenum target,
 141                                          struct gl_program *prog )
 142 {
 143    struct brw_context *brw = brw_context(ctx);
 144    int i;
 145
 146    if (target == GL_FRAGMENT_PROGRAM_ARB) {
 147       struct gl_fragment_program *fprog = (struct gl_fragment_program *) prog;
 148       struct brw_fragment_program *newFP = brw_fragment_program(fprog);
 149       const struct brw_fragment_program *curFP =
 150          brw_fragment_program_const(brw->fragment_program);
 151
 152       if (fprog->FogOption) {
 153          _mesa_append_fog_code(ctx, fprog);
 154          fprog->FogOption = GL_NONE;
 155       }
 156
 157       if (newFP == curFP)
 158          brw->state.dirty.brw |= BRW_NEW_FRAGMENT_PROGRAM;
 159       newFP->id = brw->program_id++;
 160       newFP->isGLSL = brw_wm_is_glsl(fprog);
 161    }
 162    else if (target == GL_VERTEX_PROGRAM_ARB) {
 163       struct gl_vertex_program *vprog = (struct gl_vertex_program *) prog;
 164       struct brw_vertex_program *newVP = brw_vertex_program(vprog);
 165       const struct brw_vertex_program *curVP =
 166          brw_vertex_program_const(brw->vertex_program);
 167
 168       if (newVP == curVP)
 169          brw->state.dirty.brw |= BRW_NEW_VERTEX_PROGRAM;
 170       if (newVP->program.IsPositionInvariant) {
 171          _mesa_insert_mvp_code(ctx, &newVP->program);
 172       }
 173       newVP->id = brw->program_id++;
 174
 175       /* Also tell tnl about it:
 176        */
 177       _tnl_program_string(ctx, target, prog);
 178    }
 179
 180    /* Reject programs with subroutines, which are totally broken at the moment
 181     * (all program flows return when any program flow returns, and
 182     * the VS also hangs if a function call calls a function.
 183     *
 184     * See piglit glsl-{vs,fs}-functions-[23] tests.
 185     */
 186    for (i = 0; i < prog->NumInstructions; i++) {
 187       if (prog->Instructions[i].Opcode == OPCODE_CAL) {
 188          shader_error(ctx, prog,
 189                       "i965 driver doesn't yet support uninlined function "
 190                       "calls.  Move to using a single return statement at "
 191                       "the end of the function to work around it.");
 192          return GL_FALSE;
 193       }
 194    }
 195
 196    return GL_TRUE;
 197 }
 198
 199 void brwInitFragProgFuncs( struct dd_function_table *functions )
 200 {
 201    assert(functions->ProgramStringNotify == _tnl_program_string);
 202
 203    functions->BindProgram = brwBindProgram;
 204    functions->NewProgram = brwNewProgram;
 205    functions->DeleteProgram = brwDeleteProgram;
 206    functions->IsProgramNative = brwIsProgramNative;
 207    functions->ProgramStringNotify = brwProgramStringNotify;
 208 }
 209