130 lines
3.3 KiB
C++
130 lines
3.3 KiB
C++
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/* Copyright (C) 2001-2007 Peter Selinger.
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* This file is part of Potrace. It is free software and it is covered
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* by the GNU General Public License. See the file COPYING for details.
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*/
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#include <stdlib.h>
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#include <string.h>
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#include "potracelib.h"
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#include "curve.h"
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#include "decompose.h"
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#include "trace.h"
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#include "progress.h"
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#include "potrace_version.h"
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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/* default parameters */
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static const potrace_param_t param_default =
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{
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2, /* turdsize */
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POTRACE_TURNPOLICY_MINORITY, /* turnpolicy */
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1.0, /* alphamax */
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1, /* opticurve */
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0.2, /* opttolerance */
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{
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NULL, /* callback function */
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NULL, /* callback data */
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0.0, 1.0, /* progress range */
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0.0, /* granularity */
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},
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};
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/* Return a fresh copy of the set of default parameters, or NULL on
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* failure with errno set. */
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potrace_param_t* potrace_param_default( void )
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{
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potrace_param_t* p;
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p = (potrace_param_t*) malloc( sizeof(potrace_param_t) );
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if( !p )
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{
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return NULL;
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}
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memcpy( p, ¶m_default, sizeof(potrace_param_t) );
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return p;
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}
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/* On success, returns a Potrace state st with st->status ==
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* POTRACE_STATUS_OK. On failure, returns NULL if no Potrace state
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* could be created (with errno set), or returns an incomplete Potrace
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* state (with st->status == POTRACE_STATUS_INCOMPLETE). Complete or
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* incomplete Potrace state can be freed with potrace_state_free(). */
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potrace_state_t* potrace_trace( const potrace_param_t* param, const potrace_bitmap_t* bm )
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{
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int r;
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path_t* plist = NULL;
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potrace_state_t* st;
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progress_t prog;
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progress_t subprog;
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/* prepare private progress bar state */
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prog.callback = param->progress.callback;
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prog.data = param->progress.data;
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prog.min = param->progress.min;
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prog.max = param->progress.max;
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prog.epsilon = param->progress.epsilon;
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prog.d_prev = param->progress.min;
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/* allocate state object */
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st = (potrace_state_t*) malloc( sizeof(potrace_state_t) );
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if( !st )
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{
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return NULL;
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}
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progress_subrange_start( 0.0, 0.1, &prog, &subprog );
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/* process the image */
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r = bm_to_pathlist( bm, &plist, param, &subprog );
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if( r )
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{
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free( st );
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return NULL;
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}
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st->status = POTRACE_STATUS_OK;
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st->plist = plist;
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st->priv = NULL; /* private state currently unused */
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progress_subrange_end( &prog, &subprog );
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progress_subrange_start( 0.1, 1.0, &prog, &subprog );
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/* partial success. */
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r = process_path( plist, param, &subprog );
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if( r )
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{
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st->status = POTRACE_STATUS_INCOMPLETE;
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}
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progress_subrange_end( &prog, &subprog );
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return st;
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}
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/* free a Potrace state, without disturbing errno. */
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void potrace_state_free( potrace_state_t* st )
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{
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pathlist_free( st->plist );
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free( st );
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}
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/* free a parameter list, without disturbing errno. */
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void potrace_param_free( potrace_param_t* p )
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{
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free( p );
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}
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const char* potrace_version( void )
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{
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return POTRACELIB_VERSION;
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}
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