fix minor typo in comment

[mesa.git] / src / mesa / swrast / s_fragprog_to_c.c

diff --git a/src/mesa/swrast/s_fragprog_to_c.c b/src/mesa/swrast/s_fragprog_to_c.c
index f4bae2a82d000d4c0fccb5517ab163d1694829f6..d5d27d0bcf713cddb35a3ea8f69983b8a8cf035d 100644 (file)
--- a/src/mesa/swrast/s_fragprog_to_c.c
+++ b/src/mesa/swrast/s_fragprog_to_c.c
@@ -39,6 +39,8 @@
 #include "s_texture.h"
 
 
+#ifdef USE_TCC
+
 /* UREG - a way of representing an FP source register including
  * swizzling and negation in a single GLuint.  Major flaw is the
  * limitiation to source->Index < 32.  Secondary flaw is the fact that
@@ -157,19 +159,20 @@ static void emit( struct fragment_program *p,
    va_list ap;
    va_start( ap, fmt );  
 
-   p->c_strlen += vsnprintf( p->c_str + p->c_strlen, 
-                            sizeof(p->c_str) - p->c_strlen,
-                            fmt, ap );
+   if (p->c_strlen < sizeof(p->c_str))
+      p->c_strlen += vsnprintf( p->c_str + p->c_strlen, 
+                               sizeof(p->c_str) - p->c_strlen,
+                               fmt, ap );
    
    va_end( ap );
 }
 
 static INLINE void emit_char( struct fragment_program *p, char c )
 {
-   if (p->c_strlen < sizeof(p->c_str))
+   if (p->c_strlen < sizeof(p->c_str)) {
        p->c_str[p->c_strlen] = c;
-   
-   p->c_strlen++;
+       p->c_strlen++;
+   }
 }
 
 
@@ -202,6 +205,18 @@ static void print_header( struct fragment_program *p )
 {
    emit(p, "\n\n\n");
 
+   /* Mesa's program_parameter struct:
+    */
+   emit(p, 
+       "struct program_parameter\n"
+       "{\n"
+       "   const char *Name;\n"
+       "   int Type;\n"
+       "   int StateIndexes[6];\n"
+       "   float Values[4];\n"
+       "};\n");
+
+
    /* Texture samplers, not written yet:
     */
    emit(p, "extern void TEX( void *ctx, const float *txc, int unit, float *rslt );\n"
@@ -225,14 +240,15 @@ static void print_header( struct fragment_program *p )
    /* The usual macros, not really needed, but handy:
     */
    emit(p, "#define MIN2(x,y) ((x)<(y)?(x):(y))\n"
-         "#define MAX2(x,y) ((x)<(y)?(x):(y))\n");
+         "#define MAX2(x,y) ((x)<(y)?(x):(y))\n"
+         "#define SATURATE(x) ((x)>1.0?1.0:((x)<0.0?0.0:(x)))\n");
 
    /* Our function!
     */
-   emit(p, "void run_program( void *ctx, \n"
+   emit(p, "int run_program( void *ctx, \n"
          "                  const float (*local_param)[4], \n"
          "                  const float (*env_param)[4], \n"
-         "                  const float (*state_param)[4], \n"
+         "                  const struct program_parameter *state_param, \n"
          "                  const float (*interp)[4], \n"
          "                  float (*outputs)[4])\n"
          "{\n"
@@ -242,6 +258,7 @@ static void print_header( struct fragment_program *p )
 
 static void print_footer( struct fragment_program *p )
 {
+   emit(p, "   return 1;");
    emit(p, "}\n");
 }
 
@@ -279,11 +296,15 @@ static void print_reg( struct fragment_program *p,
    case UREG_TYPE_INTERP: emit(p, "interp"); break;
    case UREG_TYPE_LOCAL_CONST: emit(p, "local_const"); break;
    case UREG_TYPE_ENV_CONST: emit(p, "env_const"); break;
-   case UREG_TYPE_STATE_CONST: emit(p, "state_const"); break;
+   case UREG_TYPE_STATE_CONST: emit(p, "state_param"); break;
    case UREG_TYPE_PARAM: emit(p, "param"); break;
    };
    
    emit(p, "[%d]", GET_UREG_NR(arg));
+
+   if (GET_UREG_TYPE(arg) == UREG_TYPE_STATE_CONST) {
+      emit(p, ".Values");
+   }
 }
 
 
@@ -305,7 +326,8 @@ static void print_arg( struct fragment_program *p,
       return;
    }
 
-   if (GET_UREG_TYPE(arg) == UREG_TYPE_STATE_CONST) {
+   if (GET_UREG_TYPE(arg) == UREG_TYPE_STATE_CONST &&
+       p->Parameters->Parameters[GET_UREG_NR(arg)].Type == CONSTANT) {
       emit(p, "%g", p->Parameters->Parameters[GET_UREG_NR(arg)].Values[src]);
       return;
    }
@@ -347,6 +369,26 @@ static void print_expression( struct fragment_program *p,
    emit(p, ";\n");
 }
 
+static void do_tex_kill( struct fragment_program *p,
+                        const struct fp_instruction *inst,
+                        GLuint arg )
+{
+   GLuint i;
+
+   emit(p, "if (");
+
+   for (i = 0; i < 4; i++) {
+      print_arg( p, deref(arg, i) );
+      emit(p, " < 0 ");
+      if (i + 1 < 4)
+        emit(p, "|| ");
+   }
+
+   emit(p, ")\n");
+   emit(p, "           return 0;\n");
+
+}
+
 static void do_tex_simple( struct fragment_program *p,
                           const struct fp_instruction *inst,
                           const char *fn, GLuint texunit, GLuint arg )
@@ -408,9 +450,9 @@ static void saturate( struct fragment_program *p,
 {
    emit(p, "   ");
    print_dest(p, inst, i);
-   emit(p, " = CLAMPF( ");
+   emit(p, " = SATURATE( ");
    print_dest(p, inst, i);
-   emit(p, ", 0.0, 1.0);\n");
+   emit(p, ");\n");
 }
                     
 static void assign_single( GLuint i,
@@ -641,7 +683,7 @@ static void translate_program( struct fragment_program *p )
         break;
 
       case FP_OPCODE_KIL:
-        /* TODO */
+        do_tex_kill(p, inst, src[0]);
         break;
 
       case FP_OPCODE_LG2: 
@@ -774,10 +816,7 @@ void _swrast_translate_program( GLcontext *ctx )
       print_header( p );
       translate_program( p );
       print_footer( p );
-      emit_char(p, 0);
-      
-      printf("C program length: %d/%d chars\n", p->c_strlen, strlen(p->c_str));
-      printf(p->c_str);
    }
 }
 
+#endif /*USE_TCC*/