/**

* MojoShader; generate shader programs from bytecode of compiled

* Direct3D shaders.

*

* Please see the file LICENSE.txt in the source's root directory.

*

* This file written by Ryan C. Gordon.

*/

#define __MOJOSHADER_INTERNAL__ 1

#include "mojoshader_internal.h"

#include <math.h>

#if SUPPORT_PRESHADERS

void MOJOSHADER_runPreshader(const MOJOSHADER_preshader *preshader,

const float *inregs, float *outregs)

{

// this is fairly straightforward, as there aren't any branching

// opcodes in the preshader instruction set (at the moment, at least).

const int scalarstart = (int) MOJOSHADER_PRESHADEROP_SCALAR_OPS;

double *temps = NULL;

if (preshader->temp_count > 0)

{

temps = (double *) alloca(sizeof (double) * preshader->temp_count);

memset(temps, '\0', sizeof (double) * preshader->temp_count);

} // if

double dst[4] = { 0, 0, 0, 0 };

double src[3][4] = { { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, { 0, 0, 0, 0 } };

const double *src0 = &src[0][0];

const double *src1 = &src[1][0];

const double *src2 = &src[2][0];

MOJOSHADER_preshaderInstruction *inst = preshader->instructions;

int instit;

for (instit = 0; instit < preshader->instruction_count; instit++, inst++)

{

const MOJOSHADER_preshaderOperand *operand = inst->operands;

const int elems = inst->element_count;

const int elemsbytes = sizeof (double) * elems;

const int isscalarop = (inst->opcode >= scalarstart);

assert(elems >= 0);

assert(elems <= 4);

// load up our operands...

int opiter, elemiter;

for (opiter = 0; opiter < inst->operand_count-1; opiter++, operand++)

{

const int isscalar = ((isscalarop) && (opiter == 0));

const unsigned int index = operand->index;

switch (operand->type)

{

case MOJOSHADER_PRESHADEROPERAND_LITERAL:

{

const double *lit = &preshader->literals[index];

assert((index + elems) <= preshader->literal_count);

if (!isscalar)

memcpy(&src[opiter][0], lit, elemsbytes);

else

{

const double val = *lit;

for (elemiter = 0; elemiter < elems; elemiter++)

src[opiter][elemiter] = val;

} // else

break;

} // case

case MOJOSHADER_PRESHADEROPERAND_INPUT:

if (isscalar)

src[opiter][0] = inregs[index];

else

{

int cpy;

for (cpy = 0; cpy < elems; cpy++)

src[opiter][cpy] = inregs[index+cpy];

} // else

break;

case MOJOSHADER_PRESHADEROPERAND_OUTPUT:

if (isscalar)

src[opiter][0] = outregs[index];

else

{

int cpy;

for (cpy = 0; cpy < elems; cpy++)

src[opiter][cpy] = outregs[index+cpy];

} // else

break;

case MOJOSHADER_PRESHADEROPERAND_TEMP:

if (temps != NULL)

{

if (isscalar)

src[opiter][0] = temps[index];

else

memcpy(src[opiter], temps + index, elemsbytes);

} // if

break;

default:

assert(0 && "unexpected preshader operand type.");

return;

} // switch

} // for

// run the actual instruction, store result to dst.

int i;

switch (inst->opcode)

{

#define OPCODE_CASE(op, val) \

case MOJOSHADER_PRESHADEROP_##op: \

for (i = 0; i < elems; i++) { dst[i] = val; } \

break;

//OPCODE_CASE(NOP, 0.0) // not a real instruction.

OPCODE_CASE(MOV, src0[i])

OPCODE_CASE(NEG, -src0[i])

OPCODE_CASE(RCP, 1.0 / src0[i])

OPCODE_CASE(FRC, src0[i] - floor(src0[i]))

OPCODE_CASE(EXP, exp(src0[i]))

OPCODE_CASE(LOG, log(src0[i]))

OPCODE_CASE(RSQ, 1.0 / sqrt(src0[i]))

OPCODE_CASE(SIN, sin(src0[i]))

OPCODE_CASE(COS, cos(src0[i]))

OPCODE_CASE(ASIN, asin(src0[i]))

OPCODE_CASE(ACOS, acos(src0[i]))

OPCODE_CASE(ATAN, atan(src0[i]))

OPCODE_CASE(MIN, (src0[i] < src1[i]) ? src0[i] : src1[i])

OPCODE_CASE(MAX, (src0[i] > src1[i]) ? src0[i] : src1[i])

OPCODE_CASE(LT, (src0[i] < src1[i]) ? 1.0 : 0.0)

OPCODE_CASE(GE, (src0[i] >= src1[i]) ? 1.0 : 0.0)

OPCODE_CASE(ADD, src0[i] + src1[i])

OPCODE_CASE(MUL, src0[i] * src1[i])

OPCODE_CASE(ATAN2, atan2(src0[i], src1[i]))

OPCODE_CASE(DIV, src0[i] / src1[i])

OPCODE_CASE(CMP, (src0[i] >= 0.0) ? src1[i] : src2[i])

//OPCODE_CASE(NOISE, ???) // !!! FIXME: don't know what this does

//OPCODE_CASE(MOVC, ???) // !!! FIXME: don't know what this does

OPCODE_CASE(MIN_SCALAR, (src0[0] < src1[i]) ? src0[0] : src1[i])

OPCODE_CASE(MAX_SCALAR, (src0[0] > src1[i]) ? src0[0] : src1[i])

OPCODE_CASE(LT_SCALAR, (src0[0] < src1[i]) ? 1.0 : 0.0)

OPCODE_CASE(GE_SCALAR, (src0[0] >= src1[i]) ? 1.0 : 0.0)

OPCODE_CASE(ADD_SCALAR, src0[0] + src1[i])

OPCODE_CASE(MUL_SCALAR, src0[0] * src1[i])

OPCODE_CASE(ATAN2_SCALAR, atan2(src0[0], src1[i]))

OPCODE_CASE(DIV_SCALAR, src0[0] / src1[i])

//OPCODE_CASE(DOT_SCALAR) // !!! FIXME: isn't this just a MUL?

//OPCODE_CASE(NOISE_SCALAR, ???) // !!! FIXME: ?

#undef OPCODE_CASE

case MOJOSHADER_PRESHADEROP_DOT:

{

double final = 0.0;

for (i = 0; i < elems; i++)

final += src0[i] * src1[i];

for (i = 0; i < elems; i++)

dst[i] = final; // !!! FIXME: is this right?

} // case

default:

assert(0 && "Unhandled preshader opcode!");

break;

} // switch

// Figure out where dst wants to be stored.

if (operand->type == MOJOSHADER_PRESHADEROPERAND_TEMP)

{

assert(preshader->temp_count >=

operand->index + (elemsbytes / sizeof (double)));

memcpy(temps + operand->index, dst, elemsbytes);

} // if

else

{

assert(operand->type == MOJOSHADER_PRESHADEROPERAND_OUTPUT);

for (i = 0; i < elems; i++)

outregs[operand->index + i] = (float) dst[i];

} // else

} // for

} // MOJOSHADER_runPreshader

#endif

static MOJOSHADER_effect MOJOSHADER_out_of_mem_effect = {

1, &MOJOSHADER_out_of_mem_error, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0

};

static uint32 readui32(const uint8 **_ptr, uint32 *_len)

{

uint32 retval = 0;

if (*_len < sizeof (retval))

*_len = 0;

else

{

const uint32 *ptr = (const uint32 *) *_ptr;

retval = SWAP32(*ptr);

*_ptr += sizeof (retval);

*_len -= sizeof (retval);

} // else

return retval;

} // readui32

// !!! FIXME: this is sort of a big, ugly function.

const MOJOSHADER_effect *MOJOSHADER_parseEffect(const char *profile,

void *d)

{

if ( ((m == NULL) && (f != NULL)) || ((m != NULL) && (f == NULL)) )

return &MOJOSHADER_out_of_mem_effect; // supply both or neither.

if (m == NULL) m = MOJOSHADER_internal_malloc;

if (f == NULL) f = MOJOSHADER_internal_free;

MOJOSHADER_effect *retval = m(sizeof (MOJOSHADER_effect), d);

if (retval == NULL)

return &MOJOSHADER_out_of_mem_effect; // supply both or neither.

memset(retval, '\0', sizeof (*retval));

retval->malloc = m;

retval->free = f;

retval->malloc_data = d;

const uint8 *ptr = (const uint8 *) buf;

uint32 len = (uint32) _len;

size_t siz = 0;

int i, j, k;

if (len < 8)

goto parseEffect_unexpectedEOF;

const uint8 *base = NULL;

if (readui32(&ptr, &len) != 0xFEFF0901) // !!! FIXME: is this always magic?

goto parseEffect_notAnEffectsFile;

else

{

const uint32 offset = readui32(&ptr, &len);

base = ptr;

//printf("base offset == %u\n", offset);

if (offset > len)

goto parseEffect_unexpectedEOF;

ptr += offset;

len -= offset;

} // else

// params...

if (len < 16)

goto parseEffect_unexpectedEOF;

const uint32 numparams = readui32(&ptr, &len);

const uint32 numtechniques = readui32(&ptr, &len);

readui32(&ptr, &len); // !!! FIXME: there are 8 unknown bytes here. Annotations?

/*const uint32 numobjects = */ readui32(&ptr, &len);

if (numparams > 0)

{

siz = sizeof (MOJOSHADER_effectParam) * numparams;

retval->params = (MOJOSHADER_effectParam *) m(siz, d);

if (retval->params == NULL)

goto parseEffect_outOfMemory;

memset(retval->params, '\0', siz);

retval->param_count = numparams;

for (i = 0; i < numparams; i++)

{

if (len < 16)

goto parseEffect_unexpectedEOF;

const uint32 typeoffset = readui32(&ptr, &len);

/*const uint32 valoffset =*/ readui32(&ptr, &len);

/*const uint32 flags =*/ readui32(&ptr, &len);

const uint32 numannos = readui32(&ptr, &len);

for (j = 0; j < numannos; j++)

{

if (len < 8)

goto parseEffect_unexpectedEOF;

// !!! FIXME: parse annotations.

readui32(&ptr, &len);

readui32(&ptr, &len);

} // for

const uint8 *typeptr = base + typeoffset;

unsigned int typelen = 9999999; // !!! FIXME

/*const uint32 paramtype =*/ readui32(&typeptr, &typelen);

/*const uint32 paramclass =*/ readui32(&typeptr, &typelen);

const uint32 paramname = readui32(&typeptr, &typelen);

const uint32 paramsemantic = readui32(&typeptr, &typelen);

// !!! FIXME: sanity checks!

const char *namestr = ((const char *) base) + paramname;

const char *semstr = ((const char *) base) + paramsemantic;

uint32 len;

char *strptr;

len = *((const uint32 *) namestr);

strptr = (char *) m(len + 1, d);

memcpy(strptr, namestr + 4, len);

strptr[len] = '\0';

retval->params[i].name = strptr;

len = *((const uint32 *) semstr);

strptr = (char *) m(len + 1, d);

memcpy(strptr, semstr + 4, len);

strptr[len] = '\0';

retval->params[i].semantic = strptr;

} // for

} // if

uint32 numshaders = 0; // we'll calculate this later.

// techniques...

if (numtechniques > 0)

{

siz = sizeof (MOJOSHADER_effectTechnique) * numtechniques;

retval->techniques = (MOJOSHADER_effectTechnique *) m(siz, d);

if (retval->techniques == NULL)

goto parseEffect_outOfMemory;

memset(retval->techniques, '\0', siz);

retval->technique_count = numtechniques;

for (i = 0; i < numtechniques; i++)

{

if (len < 12)

goto parseEffect_unexpectedEOF;

MOJOSHADER_effectTechnique *technique = &retval->techniques[i];

const uint32 nameoffset = readui32(&ptr, &len);

const uint32 numannos = readui32(&ptr, &len);

const uint32 numpasses = readui32(&ptr, &len);

if (nameoffset >= _len)

goto parseEffect_unexpectedEOF;

if (numannos > 0)

{

// !!! FIXME: expose these to the caller?

for (j = 0; j < numannos; j++)

{

if (len < 8)

goto parseEffect_unexpectedEOF;

readui32(&ptr, &len); // typedef offset

readui32(&ptr, &len); // value offset

} // for

} // if

// !!! FIXME: verify this doesn't go past EOF looking for a null.

{

const char *namestr = ((char *) base) + nameoffset;

uint32 len = *((const uint32 *) namestr);

char *strptr = (char *) m(len + 1, d);

memcpy(strptr, namestr + 4, len);

strptr[len] = '\0';

technique->name = strptr;

}

if (numpasses > 0)

{

technique->pass_count = numpasses;

siz = sizeof (MOJOSHADER_effectPass) * numpasses;

technique->passes = (MOJOSHADER_effectPass *) m(siz, d);

if (technique->passes == NULL)

goto parseEffect_outOfMemory;

memset(technique->passes, '\0', siz);

for (j = 0; j < numpasses; j++)

{

if (len < 12)

goto parseEffect_unexpectedEOF;

MOJOSHADER_effectPass *pass = &technique->passes[j];

const uint32 passnameoffset = readui32(&ptr, &len);

const uint32 numannos = readui32(&ptr, &len);

const uint32 numstates = readui32(&ptr, &len);

if (passnameoffset >= _len)

goto parseEffect_unexpectedEOF;

// !!! FIXME: verify this doesn't go past EOF looking for a null.

{

const char *namestr = ((char *) base) + passnameoffset;

uint32 len = *((const uint32 *) namestr);

char *strptr = (char *) m(len + 1, d);

memcpy(strptr, namestr + 4, len);

strptr[len] = '\0';

pass->name = strptr;

}

if (numannos > 0)

{

for (k = 0; k < numannos; k++)

{

if (len < 8)

goto parseEffect_unexpectedEOF;

// !!! FIXME: do something with this.

readui32(&ptr, &len);

readui32(&ptr, &len);

} // for

} // if

if (numstates > 0)

{

pass->state_count = numstates;

siz = sizeof (MOJOSHADER_effectState) * numstates;

pass->states = (MOJOSHADER_effectState *) m(siz, d);

if (pass->states == NULL)

goto parseEffect_outOfMemory;

memset(pass->states, '\0', siz);

for (k = 0; k < numstates; k++)

{

if (len < 16)

goto parseEffect_unexpectedEOF;

MOJOSHADER_effectState *state = &pass->states[k];

const uint32 type = readui32(&ptr, &len);

readui32(&ptr, &len); // !!! FIXME: don't know what this field does.

/*const uint32 offsetend = */ readui32(&ptr, &len);

/*const uint32 offsetstart = */ readui32(&ptr, &len);

state->type = type;

if ((type == 0x92) || (type == 0x93))

numshaders++;

} // for

} // if

} // for

} // if

} // for

} // if

// textures...

if (len < 8)

goto parseEffect_unexpectedEOF;

const int numtextures = readui32(&ptr, &len);

const int numobjects = readui32(&ptr, &len); // !!! FIXME: "objects" for lack of a better word.

if (numtextures > 0)

{

siz = sizeof (MOJOSHADER_effectTexture) * numtextures;

retval->textures = m(siz, d);

if (retval->textures == NULL)

goto parseEffect_outOfMemory;

memset(retval->textures, '\0', siz);

for (i = 0; i < numtextures; i++)

{

if (len < 8)

goto parseEffect_unexpectedEOF;

MOJOSHADER_effectTexture *texture = &retval->textures[i];

const uint32 texparam = readui32(&ptr, &len);

const uint32 texsize = readui32(&ptr, &len);

// apparently texsize will pad out to 32 bits.

const uint32 readsize = (((texsize + 3) / 4) * 4);

if (len < readsize)

goto parseEffect_unexpectedEOF;

texture->param = texparam;

char *str = m(texsize + 1, d);

if (str == NULL)

goto parseEffect_outOfMemory;

memcpy(str, ptr, texsize);

str[texsize] = '\0';

texture->name = str;

ptr += readsize;

len -= readsize;

} // for

} // if

// shaders...

if (numshaders > 0)

{

siz = sizeof (MOJOSHADER_effectShader) * numshaders;

retval->shaders = (MOJOSHADER_effectShader *) m(siz, d);

if (retval->shaders == NULL)

goto parseEffect_outOfMemory;

memset(retval->shaders, '\0', siz);

retval->shader_count = numshaders;

// !!! FIXME: I wonder if we should pull these from offsets and not

// !!! FIXME: count on them all being in a line like this.

for (i = 0; i < numshaders; i++)

{

if (len < 24)

goto parseEffect_unexpectedEOF;

MOJOSHADER_effectShader *shader = &retval->shaders[i];

const uint32 technique = readui32(&ptr, &len);

const uint32 pass = readui32(&ptr, &len);

readui32(&ptr, &len); // !!! FIXME: don't know what this does.

readui32(&ptr, &len); // !!! FIXME: don't know what this does (vertex/pixel/geometry?)

readui32(&ptr, &len); // !!! FIXME: don't know what this does.

const uint32 shadersize = readui32(&ptr, &len);

if (len < shadersize)

goto parseEffect_unexpectedEOF;

shader->technique = technique;

shader->pass = pass;

shader->shader = MOJOSHADER_parse(profile, ptr, shadersize,

swiz, swizcount, m, f, d);

// !!! FIXME: check for errors.

ptr += shadersize;

len -= shadersize;

} // for

} // if

// !!! FIXME: we parse this, but don't expose the data, yet.

// mappings ...

assert(numshaders <= numobjects);

const uint32 nummappings = numobjects - numshaders;

if (nummappings > 0)

{

for (i = 0; i < nummappings; i++)

{

if (len < 24)

goto parseEffect_unexpectedEOF;

/*const uint32 magic = */ readui32(&ptr, &len);

/*const uint32 index = */ readui32(&ptr, &len);

readui32(&ptr, &len); // !!! FIXME: what is this field?

readui32(&ptr, &len); // !!! FIXME: what is this field?

/*const uint32 type = */ readui32(&ptr, &len);

const uint32 mapsize = readui32(&ptr, &len);

if (mapsize > 0)

{

const uint32 readsize = (((mapsize + 3) / 4) * 4);

if (len < readsize)

goto parseEffect_unexpectedEOF;

} // if

} // for

} // if

retval->profile = (char *) m(strlen(profile) + 1, d);

if (retval->profile == NULL)

goto parseEffect_outOfMemory;

strcpy((char *) retval->profile, profile);

return retval;

// !!! FIXME: do something with this.

parseEffect_notAnEffectsFile:

parseEffect_unexpectedEOF:

parseEffect_outOfMemory:

MOJOSHADER_freeEffect(retval);

return &MOJOSHADER_out_of_mem_effect;

} // MOJOSHADER_parseEffect

void MOJOSHADER_freeEffect(const MOJOSHADER_effect *_effect)

{

MOJOSHADER_effect *effect = (MOJOSHADER_effect *) _effect;

if ((effect == NULL) || (effect == &MOJOSHADER_out_of_mem_effect))

return; // no-op.

MOJOSHADER_free f = effect->free;

void *d = effect->malloc_data;

int i, j;

for (i = 0; i < effect->error_count; i++)

{

f((void *) effect->errors[i].error, d);

f((void *) effect->errors[i].filename, d);

} // for

f((void *) effect->errors, d);

f((void *) effect->profile, d);

for (i = 0; i < effect->param_count; i++)

{

f((void *) effect->params[i].name, d);

f((void *) effect->params[i].semantic, d);

} // for

f(effect->params, d);

for (i = 0; i < effect->technique_count; i++)

{

MOJOSHADER_effectTechnique *technique = &effect->techniques[i];

f((void *) technique->name, d);

for (j = 0; j < technique->pass_count; j++)

{

f((void *) technique->passes[j].name, d);

f(technique->passes[j].states, d);

} // for

f(technique->passes, d);

} // for

f(effect->techniques, d);

for (i = 0; i < effect->texture_count; i++)

f((void *) effect->textures[i].name, d);

f(effect->textures, d);

for (i = 0; i < effect->shader_count; i++)

MOJOSHADER_freeParseData(effect->shaders[i].shader);

f(effect->shaders, d);

f(effect, d);

} // MOJOSHADER_freeEffect

// end of mojoshader_effects.c ...