+++ /dev/null
-/*
- * Mesa 3-D graphics library
- * Version: 6.5
- *
- * Copyright (C) 1999-2005 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 amusing little utility to print ARB fragment programs out as a C
- * function. Resulting code not tested except visually.
- */
-
-
-#include "glheader.h"
-#include "colormac.h"
-#include "context.h"
-#include "program_instruction.h"
-#include "macros.h"
-#include "program.h"
-
-#include "s_nvfragprog.h"
-#include "s_span.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
- * it's overkill & we could probably just pass around the original
- * datatypes instead.
- */
-
-#define UREG_TYPE_TEMP 0
-#define UREG_TYPE_INTERP 1
-#define UREG_TYPE_LOCAL_CONST 2
-#define UREG_TYPE_ENV_CONST 3
-#define UREG_TYPE_STATE_CONST 4
-#define UREG_TYPE_PARAM 5
-#define UREG_TYPE_OUTPUT 6
-#define UREG_TYPE_MASK 0x7
-
-#define UREG_TYPE_SHIFT 29
-#define UREG_NR_SHIFT 24
-#define UREG_NR_MASK 0x1f /* 31 */
-#define UREG_CHANNEL_X_NEGATE_SHIFT 23
-#define UREG_CHANNEL_X_SHIFT 20
-#define UREG_CHANNEL_Y_NEGATE_SHIFT 19
-#define UREG_CHANNEL_Y_SHIFT 16
-#define UREG_CHANNEL_Z_NEGATE_SHIFT 15
-#define UREG_CHANNEL_Z_SHIFT 12
-#define UREG_CHANNEL_W_NEGATE_SHIFT 11
-#define UREG_CHANNEL_W_SHIFT 8
-#define UREG_CHANNEL_ZERO_NEGATE_MBZ 5
-#define UREG_CHANNEL_ZERO_SHIFT 4
-#define UREG_CHANNEL_ONE_NEGATE_MBZ 1
-#define UREG_CHANNEL_ONE_SHIFT 0
-
-#define UREG_BAD 0xffffffff /* not a valid ureg */
-
-#define _X 0
-#define _Y 1
-#define _Z 2
-#define _W 3
-#define _ZERO 4 /* NOTE! */
-#define _ONE 5 /* NOTE! */
-
-
-/* Construct a ureg:
- */
-#define UREG( type, nr ) (((type)<< UREG_TYPE_SHIFT) | \
- ((nr) << UREG_NR_SHIFT) | \
- (_X << UREG_CHANNEL_X_SHIFT) | \
- (_Y << UREG_CHANNEL_Y_SHIFT) | \
- (_Z << UREG_CHANNEL_Z_SHIFT) | \
- (_W << UREG_CHANNEL_W_SHIFT) | \
- (_ZERO << UREG_CHANNEL_ZERO_SHIFT) | \
- (_ONE << UREG_CHANNEL_ONE_SHIFT))
-
-#define GET_CHANNEL_SRC( reg, channel ) ((reg<<(channel*4)) & \
- (0xf<<UREG_CHANNEL_X_SHIFT))
-#define CHANNEL_SRC( src, channel ) (src>>(channel*4))
-
-#define GET_UREG_TYPE(reg) (((reg)>>UREG_TYPE_SHIFT)&UREG_TYPE_MASK)
-#define GET_UREG_NR(reg) (((reg)>>UREG_NR_SHIFT)&UREG_NR_MASK)
-
-
-
-#define UREG_XYZW_CHANNEL_MASK 0x00ffff00
-
-#define deref(reg,pos) swizzle(reg, pos, pos, pos, pos)
-
-
-static INLINE int is_swizzled( int reg )
-{
- return ((reg & UREG_XYZW_CHANNEL_MASK) !=
- (UREG(0,0) & UREG_XYZW_CHANNEL_MASK));
-}
-
-
-/* One neat thing about the UREG representation:
- */
-static INLINE int swizzle( int reg, int x, int y, int z, int w )
-{
- return ((reg & ~UREG_XYZW_CHANNEL_MASK) |
- CHANNEL_SRC( GET_CHANNEL_SRC( reg, x ), 0 ) |
- CHANNEL_SRC( GET_CHANNEL_SRC( reg, y ), 1 ) |
- CHANNEL_SRC( GET_CHANNEL_SRC( reg, z ), 2 ) |
- CHANNEL_SRC( GET_CHANNEL_SRC( reg, w ), 3 ));
-}
-
-/* Another neat thing about the UREG representation:
- */
-static INLINE int negate( int reg, int x, int y, int z, int w )
-{
- return reg ^ (((x&1)<<UREG_CHANNEL_X_NEGATE_SHIFT)|
- ((y&1)<<UREG_CHANNEL_Y_NEGATE_SHIFT)|
- ((z&1)<<UREG_CHANNEL_Z_NEGATE_SHIFT)|
- ((w&1)<<UREG_CHANNEL_W_NEGATE_SHIFT));
-}
-
-
-
-static GLuint src_reg_file( GLuint file )
-{
- switch (file) {
- case PROGRAM_TEMPORARY: return UREG_TYPE_TEMP;
- case PROGRAM_INPUT: return UREG_TYPE_INTERP;
- case PROGRAM_LOCAL_PARAM: return UREG_TYPE_LOCAL_CONST;
- case PROGRAM_ENV_PARAM: return UREG_TYPE_ENV_CONST;
-
- case PROGRAM_STATE_VAR: return UREG_TYPE_STATE_CONST;
- case PROGRAM_NAMED_PARAM: return UREG_TYPE_PARAM;
- default: return UREG_BAD;
- }
-}
-
-static void emit( struct fragment_program *p,
- const char *fmt,
- ... )
-{
- va_list ap;
- va_start( ap, fmt );
-
- 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)) {
- p->c_str[p->c_strlen] = c;
- p->c_strlen++;
- }
-}
-
-
-/**
- * Retrieve a ureg for the given source register. Will emit
- * constants, apply swizzling and negation as needed.
- */
-static GLuint src_vector( const struct prog_src_register *source )
-{
- GLuint src;
-
- assert(source->Index < 32); /* limitiation of UREG representation */
-
- src = UREG( src_reg_file( source->File ), source->Index );
-
- src = swizzle(src,
- _X + source->Swizzle[0],
- _X + source->Swizzle[1],
- _X + source->Swizzle[2],
- _X + source->Swizzle[3]);
-
- if (source->NegateBase)
- src = negate( src, 1,1,1,1 );
-
- return src;
-}
-
-
-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"
- "extern void TXB( void *ctx, const float *txc, int unit, float *rslt );\n"
- "extern void TXP( void *ctx, const float *txc, int unit, float *rslt );\n");
-
- /* Resort to the standard math library (float versions):
- */
- emit(p, "extern float fabsf( float );\n"
- "extern float cosf( float );\n"
- "extern float sinf( float );\n"
- "extern float expf( float );\n"
- "extern float powf( float, float );\n"
- "extern float floorf( float );\n");
-
- /* These ones we have fast code in Mesa for:
- */
- emit(p, "extern float LOG2( float );\n"
- "extern float _mesa_inv_sqrtf( float );\n");
-
- /* 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 SATURATE(x) ((x)>1.0?1.0:((x)<0.0?0.0:(x)))\n");
-
- /* Our function!
- */
- emit(p, "int run_program( void *ctx, \n"
- " const float (*local_param)[4], \n"
- " const float (*env_param)[4], \n"
- " const struct program_parameter *state_param, \n"
- " const float (*interp)[4], \n"
- " float (*outputs)[4])\n"
- "{\n"
- " float temp[32][4];\n"
- );
-}
-
-static void print_footer( struct fragment_program *p )
-{
- emit(p, " return 1;");
- emit(p, "}\n");
-}
-
-static void print_dest_reg( struct fragment_program *p,
- const struct prog_instruction *inst )
-{
- switch (inst->DstReg.File) {
- case PROGRAM_OUTPUT:
- emit(p, "outputs[%d]", inst->DstReg.Index);
- break;
- case PROGRAM_TEMPORARY:
- emit(p, "temp[%d]", inst->DstReg.Index);
- break;
- default:
- break;
- }
-}
-
-static void print_dest( struct fragment_program *p,
- const struct prog_instruction *inst,
- GLuint idx )
-{
- print_dest_reg(p, inst);
- emit(p, "[%d]", idx);
-}
-
-
-#define UREG_SRC0(reg) (((reg)>>UREG_CHANNEL_X_SHIFT) & 0x7)
-
-static void print_reg( struct fragment_program *p,
- GLuint arg )
-{
- switch (GET_UREG_TYPE(arg)) {
- case UREG_TYPE_TEMP: emit(p, "temp"); break;
- 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_param"); break;
- case UREG_TYPE_PARAM: emit(p, "local_param"); break;
- };
-
- emit(p, "[%d]", GET_UREG_NR(arg));
-
- if (GET_UREG_TYPE(arg) == UREG_TYPE_STATE_CONST) {
- emit(p, ".Values");
- }
-}
-
-
-static void print_arg( struct fragment_program *p,
- GLuint arg )
-{
- GLuint src = UREG_SRC0(arg);
-
- if (src == _ZERO) {
- emit(p, "0");
- return;
- }
-
- if (arg & (1<<UREG_CHANNEL_X_NEGATE_SHIFT))
- emit(p, "-");
-
- if (src == _ONE) {
- emit(p, "1");
- return;
- }
-
- 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;
- }
-
- print_reg( p, arg );
-
- switch (src){
- case _X: emit(p, "[0]"); break;
- case _Y: emit(p, "[1]"); break;
- case _Z: emit(p, "[2]"); break;
- case _W: emit(p, "[3]"); break;
- }
-}
-
-
-/* This is where the handling of expressions breaks down into string
- * processing:
- */
-static void print_expression( struct fragment_program *p,
- GLuint i,
- const char *fmt,
- va_list ap )
-{
- while (*fmt) {
- if (*fmt == '%' && *(fmt+1) == 's') {
- int reg = va_arg(ap, int);
-
- /* Use of deref() is a bit of a hack:
- */
- print_arg( p, deref(reg, i) );
- fmt += 2;
- }
- else {
- emit_char(p, *fmt);
- fmt++;
- }
- }
-
- emit(p, ";\n");
-}
-
-static void do_tex_kill( struct fragment_program *p,
- const struct prog_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 prog_instruction *inst,
- const char *fn, GLuint texunit, GLuint arg )
-{
- emit(p, " %s( ctx, ", fn);
- print_reg( p, arg );
- emit(p, ", %d, ", texunit );
- print_dest_reg(p, inst);
- emit(p, ");\n");
-}
-
-
-static void do_tex( struct fragment_program *p,
- const struct prog_instruction *inst,
- const char *fn, GLuint texunit, GLuint arg )
-{
- GLuint i;
- GLboolean need_tex = GL_FALSE, need_result = GL_FALSE;
-
- for (i = 0; i < 4; i++)
- if (!inst->DstReg.WriteMask[i])
- need_result = GL_TRUE;
-
- if (is_swizzled(arg))
- need_tex = GL_TRUE;
-
- if (!need_tex && !need_result) {
- do_tex_simple( p, inst, fn, texunit, arg );
- return;
- }
-
- emit(p, " {\n");
- emit(p, " float texcoord[4];\n");
- emit(p, " float result[4];\n");
-
- for (i = 0; i < 4; i++) {
- emit(p, " texcoord[%d] = ", i);
- print_arg( p, deref(arg, i) );
- emit(p, ";\n");
- }
-
- emit(p, " %s( ctx, texcoord, %d, result);\n", fn, texunit );
-
- for (i = 0; i < 4; i++) {
- if (inst->DstReg.WriteMask[i]) {
- emit(p, " ");
- print_dest(p, inst, i);
- emit(p, " = result[%d];\n", i);
- }
- }
-
- emit(p, " }\n");
-}
-
-
-static void saturate( struct fragment_program *p,
- const struct prog_instruction *inst,
- GLuint i )
-{
- emit(p, " ");
- print_dest(p, inst, i);
- emit(p, " = SATURATE( ");
- print_dest(p, inst, i);
- emit(p, ");\n");
-}
-
-static void assign_single( GLuint i,
- struct fragment_program *p,
- const struct prog_instruction *inst,
- const char *fmt,
- ... )
-{
- va_list ap;
- va_start( ap, fmt );
-
- if (inst->DstReg.WriteMask[i]) {
- emit(p, " ");
- print_dest(p, inst, i);
- emit(p, " = ");
- print_expression( p, i, fmt, ap);
- if (inst->Saturate)
- saturate(p, inst, i);
- }
-
- va_end( ap );
-}
-
-static void assign4( struct fragment_program *p,
- const struct prog_instruction *inst,
- const char *fmt,
- ... )
-{
- GLuint i;
- va_list ap;
- va_start( ap, fmt );
-
- for (i = 0; i < 4; i++)
- if (inst->DstReg.WriteMask[i]) {
- emit(p, " ");
- print_dest(p, inst, i);
- emit(p, " = ");
- print_expression( p, i, fmt, ap);
- if (inst->Saturate)
- saturate(p, inst, i);
- }
-
- va_end( ap );
-}
-
-static void assign4_replicate( struct fragment_program *p,
- const struct prog_instruction *inst,
- const char *fmt,
- ... )
-{
- GLuint i, first = 0;
- GLboolean ok = 0;
- va_list ap;
-
- for (i = 0; i < 4; i++)
- if (inst->DstReg.WriteMask[i]) {
- ok = 1;
- first = i;
- break;
- }
-
- if (!ok) return;
-
- va_start( ap, fmt );
-
- emit(p, " ");
-
- print_dest(p, inst, first);
- emit(p, " = ");
- print_expression( p, 0, fmt, ap);
- if (inst->Saturate)
- saturate(p, inst, first);
- va_end( ap );
-
- for (i = first+1; i < 4; i++)
- if (inst->DstReg.WriteMask[i]) {
- emit(p, " ");
- print_dest(p, inst, i);
- emit(p, " = ");
- print_dest(p, inst, first);
- emit(p, ";\n");
- }
-}
-
-
-static void translate_program( struct fragment_program *p )
-{
- const struct prog_instruction *inst = p->Instructions;
-
- for (; inst->Opcode != OPCODE_END; inst++) {
-
- GLuint src[3], i;
- GLuint nr = _mesa_num_inst_src_regs( inst->Opcode );
-
- for (i = 0; i < nr; i++)
- src[i] = src_vector( &inst->SrcReg[i] );
-
- /* Print the original program instruction string */
- if (p->Base.String)
- {
- const char *s = (const char *) p->Base.String + inst->StringPos;
- emit(p, " /* ");
- while (*s != ';') {
- emit_char(p, *s);
- s++;
- }
- emit(p, "; */\n");
- }
-
- switch (inst->Opcode) {
- case OPCODE_ABS:
- assign4(p, inst, "fabsf(%s)", src[0]);
- break;
-
- case OPCODE_ADD:
- assign4(p, inst, "%s + %s", src[0], src[1]);
- break;
-
- case OPCODE_CMP:
- assign4(p, inst, "%s < 0.0F ? %s : %s", src[0], src[1], src[2]);
- break;
-
- case OPCODE_COS:
- assign4_replicate(p, inst, "COS(%s)", src[0]);
- break;
-
- case OPCODE_DP3:
- assign4_replicate(p, inst,
- "%s*%s + %s*%s + %s*%s",
- deref(src[0],_X),
- deref(src[1],_X),
- deref(src[0],_Y),
- deref(src[1],_Y),
- deref(src[0],_Z),
- deref(src[1],_Z));
- break;
-
- case OPCODE_DP4:
- assign4_replicate(p, inst,
- "%s*%s + %s*%s + %s*%s + %s*%s",
- deref(src[0],_X),
- deref(src[1],_X),
- deref(src[0],_Y),
- deref(src[1],_Y),
- deref(src[0],_Z),
- deref(src[1],_Z));
- break;
-
- case OPCODE_DPH:
- assign4_replicate(p, inst,
- "%s*%s + %s*%s + %s*%s + %s",
- deref(src[0],_X),
- deref(src[1],_X),
- deref(src[0],_Y),
- deref(src[1],_Y),
- deref(src[1],_Z));
- break;
-
- case OPCODE_DST:
- /* result[0] = 1 * 1;
- * result[1] = a[1] * b[1];
- * result[2] = a[2] * 1;
- * result[3] = 1 * b[3];
- */
- assign_single(0, p, inst, "1.0");
-
- assign_single(1, p, inst, "%s * %s",
- deref(src[0], _Y), deref(src[1], _Y));
-
- assign_single(2, p, inst, "%s", deref(src[0], _Z));
- assign_single(3, p, inst, "%s", deref(src[1], _W));
- break;
-
- case OPCODE_EX2:
- assign4_replicate(p, inst, "powf(2.0, %s)", src[0]);
- break;
-
- case OPCODE_FLR:
- assign4_replicate(p, inst, "floorf(%s)", src[0]);
- break;
-
- case OPCODE_FRC:
- assign4_replicate(p, inst, "%s - floorf(%s)", src[0], src[0]);
- break;
-
- case OPCODE_KIL:
- do_tex_kill(p, inst, src[0]);
- break;
-
- case OPCODE_LG2:
- assign4_replicate(p, inst, "LOG2(%s)", src[0]);
- break;
-
- case OPCODE_LIT:
- assign_single(0, p, inst, "1.0");
- assign_single(1, p, inst, "MIN2(%s, 0)", deref(src[0], _X));
- assign_single(2, p, inst, "(%s > 0.0) ? expf(%s * MIN2(%s, 0)) : 0.0",
- deref(src[0], _X),
- deref(src[0], _Z),
- deref(src[0], _Y));
- assign_single(3, p, inst, "1.0");
- break;
-
- case OPCODE_LRP:
- assign4(p, inst,
- "%s * %s + (1.0 - %s) * %s",
- src[0], src[1], src[0], src[2]);
- break;
-
- case OPCODE_MAD:
- assign4(p, inst, "%s * %s + %s", src[0], src[1], src[2]);
- break;
-
- case OPCODE_MAX:
- assign4(p, inst, "MAX2(%s, %s)", src[0], src[1]);
- break;
-
- case OPCODE_MIN:
- assign4(p, inst, "MIN2(%s, %s)", src[0], src[1]);
- break;
-
- case OPCODE_MOV:
- assign4(p, inst, "%s", src[0]);
- break;
-
- case OPCODE_MUL:
- assign4(p, inst, "%s * %s", src[0], src[1]);
- break;
-
- case OPCODE_POW:
- assign4_replicate(p, inst, "powf(%s, %s)", src[0], src[1]);
- break;
-
- case OPCODE_RCP:
- assign4_replicate(p, inst, "1.0/%s", src[0]);
- break;
-
- case OPCODE_RSQ:
- assign4_replicate(p, inst, "_mesa_inv_sqrtf(%s)", src[0]);
- break;
-
- case OPCODE_SCS:
- if (inst->DstReg.WriteMask[0]) {
- assign_single(0, p, inst, "cosf(%s)", deref(src[0], _X));
- }
-
- if (inst->DstReg.WriteMask[1]) {
- assign_single(1, p, inst, "sinf(%s)", deref(src[0], _X));
- }
- break;
-
- case OPCODE_SGE:
- assign4(p, inst, "%s >= %s ? 1.0 : 0.0", src[0], src[1]);
- break;
-
- case OPCODE_SIN:
- assign4_replicate(p, inst, "sinf(%s)", src[0]);
- break;
-
- case OPCODE_SLT:
- assign4(p, inst, "%s < %s ? 1.0 : 0.0", src[0], src[1]);
- break;
-
- case OPCODE_SUB:
- assign4(p, inst, "%s - %s", src[0], src[1]);
- break;
-
- case OPCODE_SWZ: /* same implementation as MOV: */
- assign4(p, inst, "%s", src[0]);
- break;
-
- case OPCODE_TEX:
- do_tex(p, inst, "TEX", inst->TexSrcUnit, src[0]);
- break;
-
- case OPCODE_TXB:
- do_tex(p, inst, "TXB", inst->TexSrcUnit, src[0]);
- break;
-
- case OPCODE_TXP:
- do_tex(p, inst, "TXP", inst->TexSrcUnit, src[0]);
- break;
-
- case OPCODE_XPD:
- /* Cross product:
- * result.x = src[0].y * src[1].z - src[0].z * src[1].y;
- * result.y = src[0].z * src[1].x - src[0].x * src[1].z;
- * result.z = src[0].x * src[1].y - src[0].y * src[1].x;
- * result.w = undef;
- */
- assign4(p, inst,
- "%s * %s - %s * %s",
- swizzle(src[0], _Y, _Z, _X, _ONE),
- swizzle(src[1], _Z, _X, _Y, _ONE),
- swizzle(src[0], _Z, _X, _Y, _ONE),
- swizzle(src[1], _Y, _Z, _X, _ONE));
- break;
-
- default:
- emit(p, "BOGUS OPCODE\n");
- return;
- }
- }
-}
-
-
-
-
-
-void _swrast_translate_program( GLcontext *ctx )
-{
- struct fragment_program *p = ctx->FragmentProgram._Current;
-
- if (p) {
- p->c_strlen = 0;
-
- print_header( p );
- translate_program( p );
- print_footer( p );
- }
-}
-
-#endif /*USE_TCC*/
+++ /dev/null
-/*
- * Mesa 3-D graphics library
- * Version: 6.5
- *
- * Copyright (C) 1999-2005 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 "glheader.h"
-#include "imports.h"
-#include "colormac.h"
-#include "context.h"
-#include "program_instruction.h"
-#include "macros.h"
-#include "program.h"
-
-#include "s_nvfragprog.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, 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, 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 )
-{
- (void) ctx;
- (void) program; (void) maxInst;
- (void) machine; (void) span;
- (void) column;
- return 0;
-}
-
-#endif
projects / mesa.git / commitdiff