225977/texenvprogram.i.2

   1 struct gl_fragment_program_state {
   2         unsigned char _Enabled;
   3         struct gl_fragment_program *_TexEnvProgram;
   4 };
   5 struct gl_shader_state {
   6         struct gl_shader_program *CurrentProgram;
   7 };
   8 struct gl_constants {
   9         unsigned int MaxTextureUnits;
  10 } GLvertexformat;
  11 typedef struct {
  12         struct gl_constants Const;
  13         struct gl_fragment_program_state FragmentProgram;
  14         struct gl_shader_state Shader;
  15 } GLcontext;
  16 struct mode_opt {
  17         unsigned int Source:4;
  18         unsigned int Operand:3;
  19 };
  20 struct state_key {
  21         unsigned int enabled_units;
  22         struct {
  23                 unsigned int NumArgsRGB:2;
  24                 unsigned int ModeRGB:4;
  25                 struct mode_opt OptRGB[3];
  26                 unsigned int ModeA:4;
  27         } unit[8];
  28 };
  29 struct ureg {
  30         unsigned int file:4;
  31         unsigned int idx:8;
  32 };
  33 static const struct ureg undef = {
  34         0, ~0, 0, 0, 0, 0, 0
  35 };
  36 struct texenv_fragment_program {
  37         struct state_key *state;
  38         struct ureg src_texture[8];
  39         struct ureg src_previous;
  40         unsigned int last_tex_stage;
  41 };
  42 static struct ureg get_temp(struct texenv_fragment_program *p)
  43 {
  44 }
  45 static struct ureg register_const4f(struct texenv_fragment_program *p,
  46                                     float s0, float s1, float s2,
  47                                     float s3)
  48 {
  49 }
  50 static struct ureg emit_combine_source(struct texenv_fragment_program *p,
  51                                        unsigned int mask, unsigned int unit, unsigned int source,
  52                                        unsigned int operand)
  53 {
  54 }
  55 static struct ureg emit_combine(struct texenv_fragment_program *p,
  56                                 struct ureg dest, unsigned int mask,
  57                                 unsigned char saturate, unsigned int unit, unsigned int nr,
  58                                 unsigned int mode, const struct mode_opt *opt)
  59 {
  60         struct ureg src[3];
  61         unsigned int i;
  62         for (i = 0; i < nr; i++)
  63                 src[i] =
  64                     emit_combine_source(p, mask, unit, opt[i].Source,
  65                                         opt[i].Operand);
  66         switch (mode) {
  67         case 6:{
  68                         struct ureg tmp0;
  69                         struct ureg neg1;
  70                         struct ureg two;
  71 neg1 = register_const4f(p, -1, -1, -1, -1);
  72 two = register_const4f(p, 2, 2, 2, 2);
  73                         emit_arith(p, 0, tmp0, 0xf, 0, two, src[0],
  74                                    neg1);
  75                 }
  76         }
  77 }
  78 static struct ureg emit_texenv(struct texenv_fragment_program *p, unsigned int unit)
  79 {
  80         struct state_key *key;
  81         unsigned char saturate;
  82         struct ureg out;
  83 struct ureg shift;
  84         struct ureg dest;
  85 key = p->state;
  86 saturate  = (unit < p->last_tex_stage);
  87         if (key->unit[unit].ModeRGB == key->unit[unit].ModeA
  88             && args_match(key, unit))
  89                 out =
  90                     emit_combine(p, dest, 0xf, saturate, unit,
  91                                  key->unit[unit].NumArgsRGB,
  92                                  key->unit[unit].ModeRGB,
  93                                  key->unit[unit].OptRGB);
  94 }
  95 static void create_new_program(GLcontext * ctx, struct state_key *key,
  96                                struct gl_fragment_program *program)
  97 {
  98         struct texenv_fragment_program p;
  99         unsigned int unit;
 100         for (unit = 0; unit < 8; unit++)
 101                 p.src_texture[unit] = undef;
 102         if (key->enabled_units)
 103                 for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++)
 104                         if (key->enabled_units & (1 << unit))
 105                                 p.src_previous = emit_texenv(&p, unit);
 106 }
 107 void _mesa_UpdateTexEnvProgram(GLcontext * ctx)
 108 {
 109         struct state_key key;
 110         if (!ctx->FragmentProgram._Enabled && !ctx->Shader.CurrentProgram)
 111                 if (!ctx->FragmentProgram._TexEnvProgram)
 112                         create_new_program(ctx, &key,
 113                                            ctx->FragmentProgram._TexEnvProgram);
 114 }