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++;
+ }
}
{
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"
/* 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"
static void print_footer( struct fragment_program *p )
{
+ emit(p, " return 1;");
emit(p, "}\n");
}
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");
+ }
}
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;
}
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 )
break;
case FP_OPCODE_KIL:
- /* TODO */
+ do_tex_kill(p, inst, src[0]);
break;
case FP_OPCODE_LG2:
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);
}
}
--- /dev/null
+/*
+ * Mesa 3-D graphics library
+ * Version: 6.1
+ *
+ * Copyright (C) 1999-2004 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/* An attempt to hook s_fragprog_to_c.c up to libtcc.a to try &
+ * generate some real code.
+ *
+ * TCC isn't threadsafe, so it will need additional locking help if we
+ * end up using it as a backend in mesa.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+
+
+#include "glheader.h"
+#include "colormac.h"
+#include "context.h"
+#include "nvfragprog.h"
+#include "macros.h"
+#include "program.h"
+
+#include "s_nvfragprog.h"
+#include "s_texture.h"
+
+#ifdef USE_TCC
+
+#include <libtcc.h>
+
+typedef int (*cfunc)( void *ctx,
+ const GLfloat (*local_param)[4],
+ const GLfloat (*env_param)[4],
+ const struct program_parameter *state_param,
+ const GLfloat (*interp)[4],
+ GLfloat (*outputs)[4]);
+
+
+static cfunc current_func;
+static struct fragment_program *current_program;
+static TCCState *current_tcc_state;
+
+
+static void TEX( void *cc, const float *texcoord, int unit, float *result )
+{
+ GLcontext *ctx = (GLcontext *)cc;
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLfloat lambda = 1.0; /* hack */
+ GLchan rgba[4];
+
+ swrast->TextureSample[unit](ctx, unit, ctx->Texture.Unit[unit]._Current,
+ 1, (const GLfloat (*)[4]) texcoord,
+ &lambda, &rgba);
+
+ result[0] = CHAN_TO_FLOAT(rgba[0]);
+ result[1] = CHAN_TO_FLOAT(rgba[1]);
+ result[2] = CHAN_TO_FLOAT(rgba[2]);
+ result[3] = CHAN_TO_FLOAT(rgba[3]);
+}
+
+
+static void TXB( void *cc, const float *texcoord, int unit, float *result )
+{
+ GLcontext *ctx = (GLcontext *)cc;
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ GLfloat lambda = 1.0; /* hack */
+ GLchan rgba[4];
+
+ /* texcoord[3] is the bias to add to lambda */
+ lambda += texcoord[3];
+
+
+ /* Is it necessary to reset texcoord[3] to 1 at this point?
+ */
+ swrast->TextureSample[unit](ctx, unit, ctx->Texture.Unit[unit]._Current,
+ 1, (const GLfloat (*)[4]) texcoord,
+ &lambda, &rgba);
+
+ result[0] = CHAN_TO_FLOAT(rgba[0]);
+ result[1] = CHAN_TO_FLOAT(rgba[1]);
+ result[2] = CHAN_TO_FLOAT(rgba[2]);
+ result[3] = CHAN_TO_FLOAT(rgba[3]);
+}
+
+
+static void TXP( void *cc, const float *texcoord, int unit, float *result )
+{
+ /* I think that TEX needs to undo the perspective divide which has
+ * already occurred. In the meantime, TXP is correct to do this:
+ */
+ TEX( cc, texcoord, unit, result );
+}
+
+
+static cfunc codegen( TCCState *s, const char *prog, const char *fname )
+{
+ unsigned long val;
+
+ if (s)
+ tcc_delete(s);
+
+ s = tcc_new();
+ if (!s)
+ return 0;
+
+ tcc_set_output_type(s, TCC_OUTPUT_MEMORY);
+ tcc_compile_string(s, prog);
+
+/* tcc_add_dll("/usr/lib/libm.so"); */
+
+ tcc_add_symbol(s, "TEX", (unsigned long)&TEX);
+ tcc_add_symbol(s, "TXB", (unsigned long)&TXB);
+ tcc_add_symbol(s, "TXP", (unsigned long)&TXP);
+
+
+ tcc_relocate(s);
+ tcc_get_symbol(s, &val, fname);
+ return (cfunc) val;
+}
+
+/* TCC isn't threadsafe and even seems not to like having more than
+ * one TCCState created or used at any one time in a single threaded
+ * environment. So, this code is all for investigation only and can't
+ * currently be used in Mesa proper.
+ *
+ * I've taken some liberties with globals myself, now.
+ */
+GLboolean
+_swrast_execute_codegen_program( GLcontext *ctx,
+ const struct fragment_program *program, GLuint maxInst,
+ struct fp_machine *machine, const struct sw_span *span,
+ GLuint column )
+{
+ if (program != current_program) {
+
+ _swrast_translate_program( ctx );
+
+ fprintf(stderr, "%s: compiling:\n%s\n", __FUNCTION__, program->c_str);
+
+ current_program = program;
+ current_func = codegen( current_tcc_state, program->c_str,
+ "run_program" );
+ }
+
+ assert(current_func);
+
+ return current_func( ctx,
+ program->Base.LocalParams,
+ (const GLfloat (*)[4])ctx->FragmentProgram.Parameters,
+ program->Parameters->Parameters,
+ (const GLfloat (*)[4])machine->Inputs,
+ machine->Outputs );
+}
+
+#else /* USE_TCC */
+
+GLboolean
+_swrast_execute_codegen_program( GLcontext *ctx,
+ const struct fragment_program *program, GLuint maxInst,
+ struct fp_machine *machine, const struct sw_span *span,
+ GLuint column )
+{
+ return 0;
+}
+
+#endif
projects / mesa.git / commitdiff