mirror of
https://github.com/id-Software/GtkRadiant.git
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The GtkRadiant sources as originally released under the GPL license.
This commit is contained in:
Travis Bradshaw
278
libs/picomodel/lwo/clip.c
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278
libs/picomodel/lwo/clip.c
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/*
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======================================================================
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clip.c
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Functions for LWO2 image references.
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Ernie Wright 17 Sep 00
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====================================================================== */
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#include "../picointernal.h"
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#include "lwo2.h"
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/*
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======================================================================
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lwFreeClip()
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Free memory used by an lwClip.
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====================================================================== */
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void lwFreeClip( lwClip *clip )
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{
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if ( clip ) {
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lwListFree( clip->ifilter, (void *) lwFreePlugin );
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lwListFree( clip->pfilter, (void *) lwFreePlugin );
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switch ( clip->type ) {
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case ID_STIL:
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_pico_free( clip->source.still.name);
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break;
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case ID_ISEQ:
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_pico_free( clip->source.seq.prefix );
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_pico_free( clip->source.seq.suffix );
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break;
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case ID_ANIM:
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_pico_free( clip->source.anim.name );
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_pico_free( clip->source.anim.server );
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_pico_free( clip->source.anim.data );
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break;
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case ID_XREF:
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_pico_free( clip->source.xref.string );
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break;
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case ID_STCC:
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_pico_free( clip->source.cycle.name );
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break;
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default:
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break;
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}
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_pico_free( clip );
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}
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}
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/*
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======================================================================
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lwGetClip()
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Read image references from a CLIP chunk in an LWO2 file.
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====================================================================== */
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lwClip *lwGetClip( picoMemStream_t *fp, int cksize )
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{
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lwClip *clip;
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lwPlugin *filt;
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unsigned int id;
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unsigned short sz;
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int pos, rlen;
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/* allocate the Clip structure */
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clip = _pico_calloc( 1, sizeof( lwClip ));
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if ( !clip ) goto Fail;
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clip->contrast.val = 1.0f;
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clip->brightness.val = 1.0f;
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clip->saturation.val = 1.0f;
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clip->gamma.val = 1.0f;
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/* remember where we started */
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set_flen( 0 );
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pos = _pico_memstream_tell( fp );
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/* index */
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clip->index = getI4( fp );
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/* first subchunk header */
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clip->type = getU4( fp );
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sz = getU2( fp );
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if ( 0 > get_flen() ) goto Fail;
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sz += sz & 1;
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set_flen( 0 );
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switch ( clip->type ) {
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case ID_STIL:
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clip->source.still.name = getS0( fp );
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break;
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case ID_ISEQ:
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clip->source.seq.digits = getU1( fp );
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clip->source.seq.flags = getU1( fp );
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clip->source.seq.offset = getI2( fp );
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getU2( fp ); /* not sure what this is yet */
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clip->source.seq.start = getI2( fp );
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clip->source.seq.end = getI2( fp );
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clip->source.seq.prefix = getS0( fp );
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clip->source.seq.suffix = getS0( fp );
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break;
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case ID_ANIM:
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clip->source.anim.name = getS0( fp );
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clip->source.anim.server = getS0( fp );
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rlen = get_flen();
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clip->source.anim.data = getbytes( fp, sz - rlen );
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break;
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case ID_XREF:
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clip->source.xref.index = getI4( fp );
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clip->source.xref.string = getS0( fp );
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break;
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case ID_STCC:
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clip->source.cycle.lo = getI2( fp );
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clip->source.cycle.hi = getI2( fp );
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clip->source.cycle.name = getS0( fp );
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break;
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default:
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break;
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}
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/* error while reading current subchunk? */
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rlen = get_flen();
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if ( rlen < 0 || rlen > sz ) goto Fail;
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/* skip unread parts of the current subchunk */
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if ( rlen < sz )
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_pico_memstream_seek( fp, sz - rlen, PICO_SEEK_CUR );
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/* end of the CLIP chunk? */
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rlen = _pico_memstream_tell( fp ) - pos;
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if ( cksize < rlen ) goto Fail;
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if ( cksize == rlen )
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return clip;
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/* process subchunks as they're encountered */
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id = getU4( fp );
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sz = getU2( fp );
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if ( 0 > get_flen() ) goto Fail;
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while ( 1 ) {
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sz += sz & 1;
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set_flen( 0 );
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switch ( id ) {
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case ID_TIME:
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clip->start_time = getF4( fp );
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clip->duration = getF4( fp );
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clip->frame_rate = getF4( fp );
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break;
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case ID_CONT:
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clip->contrast.val = getF4( fp );
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clip->contrast.eindex = getVX( fp );
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break;
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case ID_BRIT:
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clip->brightness.val = getF4( fp );
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clip->brightness.eindex = getVX( fp );
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break;
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case ID_SATR:
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clip->saturation.val = getF4( fp );
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clip->saturation.eindex = getVX( fp );
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break;
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case ID_HUE:
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clip->hue.val = getF4( fp );
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clip->hue.eindex = getVX( fp );
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break;
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case ID_GAMM:
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clip->gamma.val = getF4( fp );
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clip->gamma.eindex = getVX( fp );
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break;
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case ID_NEGA:
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clip->negative = getU2( fp );
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break;
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case ID_IFLT:
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case ID_PFLT:
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filt = _pico_calloc( 1, sizeof( lwPlugin ));
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if ( !filt ) goto Fail;
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filt->name = getS0( fp );
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filt->flags = getU2( fp );
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rlen = get_flen();
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filt->data = getbytes( fp, sz - rlen );
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if ( id == ID_IFLT ) {
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lwListAdd( (void *) &clip->ifilter, filt );
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clip->nifilters++;
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}
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else {
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lwListAdd( (void *) &clip->pfilter, filt );
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clip->npfilters++;
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}
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break;
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default:
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break;
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}
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/* error while reading current subchunk? */
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rlen = get_flen();
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if ( rlen < 0 || rlen > sz ) goto Fail;
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/* skip unread parts of the current subchunk */
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if ( rlen < sz )
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_pico_memstream_seek( fp, sz - rlen, PICO_SEEK_CUR );
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/* end of the CLIP chunk? */
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rlen = _pico_memstream_tell( fp ) - pos;
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if ( cksize < rlen ) goto Fail;
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if ( cksize == rlen ) break;
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/* get the next chunk header */
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set_flen( 0 );
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id = getU4( fp );
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sz = getU2( fp );
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if ( 6 != get_flen() ) goto Fail;
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}
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return clip;
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Fail:
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lwFreeClip( clip );
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return NULL;
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}
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/*
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======================================================================
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lwFindClip()
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Returns an lwClip pointer, given a clip index.
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====================================================================== */
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lwClip *lwFindClip( lwClip *list, int index )
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{
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lwClip *clip;
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clip = list;
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while ( clip ) {
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if ( clip->index == index ) break;
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clip = clip->next;
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}
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return clip;
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}
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