/**

* 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"

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,

const unsigned char *buf,

const unsigned int _len,

const MOJOSHADER_swizzle *swiz,

const unsigned int swizcount,

MOJOSHADER_malloc m,

MOJOSHADER_free f,

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;

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

goto parseEffect_notAnEffectsFile;

else

{

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

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.

readui32(&ptr, &len);

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

{

if (len < 16)

goto parseEffect_unexpectedEOF;

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

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

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

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

} // for

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];

// !!! FIXME: is this always 12?

const uint32 nameoffset = readui32(&ptr, &len) + 12;

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

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

if (nameoffset >= _len)

goto parseEffect_unexpectedEOF;

if (numpasses > 0)

{

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

siz = strlen(((const char *) buf) + nameoffset) + 1;

technique->name = (char *) m(siz, d);

if (technique->name == NULL)

goto parseEffect_outOfMemory;

strcpy((char *) technique->name, ((const char *) buf) + nameoffset);

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];

// !!! FIXME: is this always 12?

const uint32 passnameoffset = readui32(&ptr, &len) + 12;

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

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

if (passnameoffset >= _len)

goto parseEffect_unexpectedEOF;

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

siz = strlen(((const char *) buf) + passnameoffset) + 1;

pass->name = (char *) m(siz, d);

if (pass->name == NULL)

goto parseEffect_outOfMemory;

strcpy((char *) pass->name, ((const char *) buf) + passnameoffset);

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->technique_count; i++)

{

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

{

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

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 ...