[occt.git] / src / Xw / Xw_get_pixel.cxx

// Copyright (c) 1999-2012 OPEN CASCADE SAS
//
// The content of this file is subject to the Open CASCADE Technology Public
// License Version 6.5 (the "License"). You may not use the content of this file
// except in compliance with the License. Please obtain a copy of the License
// at http://www.opencascade.org and read it completely before using this file.
//
// The Initial Developer of the Original Code is Open CASCADE S.A.S., having its
// main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France.
//
// The Original Code and all software distributed under the License is
// distributed on an "AS IS" basis, without warranty of any kind, and the
// Initial Developer hereby disclaims all such warranties, including without
// limitation, any warranties of merchantability, fitness for a particular
// purpose or non-infringement. Please see the License for the specific terms
// and conditions governing the rights and limitations under the License.


#include <Xw_Extension.h>

/* ifdef then trace on */
#ifdef TRACE
#define TRACE_GET_PIXEL
#endif

/*
   STATUS Xw_get_pixel (aimage,x,y,index,npixel):
   XW_EXT_IMAGEDATA 		*aimage
   int x,y			Pixel position
   int *index			return Pixel color index 
   int *npixel			return Pixel number filled with 
				       the same color index

	Extract pixels index from an existing IMAGE created by Xw_get_image
		or fill with Xw_put_pixel

	returns ERROR if No image is defined
			 or No pixel color is defined
			 or Pixel position is wrong (Outside of image)
	returns SUCCESS if successful

*/

#ifdef XW_PROTOTYPE
XW_STATUS Xw_get_pixel (void* aimage,int x,int y,int* index,int* npixel)
#else
XW_STATUS Xw_get_pixel (aimage,x,y,index,npixel)
XW_EXT_IMAGEDATA *aimage ;
int x,y ;
int *index,*npixel ;
#endif /*XW_PROTOTYPE*/
{
XW_EXT_IMAGEDATA *pimage = (XW_EXT_IMAGEDATA*) aimage ;
register union {
    char  *data ;
    unsigned char *cdata ;
    unsigned short *sdata ;
    unsigned long  *ldata ;
} data ;
int i=0,fpixel,simage ;
unsigned long lpixel=0 ;
XImage *pximage;

        if( !Xw_isdefine_image(pimage) ) {
	    /*ERROR*Bad EXT_IMAGEDATA Address*/
	    Xw_set_error(25,"Xw_get_pixel",pimage) ;
            return (XW_ERROR) ;
        }

        pximage = (_ZIMAGE) ? _ZIMAGE : _IIMAGE;
	fpixel = x*pximage->width + y ;
	simage = pximage->height*pximage->width ;

	if( x < 0 || y < 0 || (fpixel >= simage) ) {
	    /*ERROR*Bad PIXEL position*/
	    Xw_set_error(47,"Xw_get_pixel",&simage) ;
	    return (XW_ERROR) ;
	}

	switch (pximage->bitmap_pad) {
	    case 8 :
		{ register unsigned char cpixel ; 
		data.data = pximage->data + (fpixel) ; simage -= fpixel ;
		cpixel = *data.cdata ;
		for( i=1 ; i<simage ; i++ ) {
		    data.cdata++ ; 
		    if( *data.cdata != cpixel ) break ;
		}
		}
		break ;
	    case 16 :
		{ register unsigned short spixel ; 
		data.data = pximage->data + (fpixel<<1) ; simage -= fpixel ;
		spixel = *data.sdata ;
		for( i=1 ; i<simage ; i++ ) {
		    data.sdata++ ; 
		    if( *data.sdata != spixel ) break ;
		}
		}
		break ;
	    case 32 :
		data.data = pximage->data + (fpixel<<2) ; simage -= fpixel;
		lpixel = *data.ldata ;
		for( i=1 ; i<simage ; i++ ) {
		    data.ldata++ ; 
		    if( *data.ldata != lpixel ) break ;
		}
	}

	*npixel = i ;
	*index = lpixel ;
	for( i=0 ; i<_ICOLORMAP->maxcolor ; i++ ) {
	    if( _ICOLORMAP->define[i] && 
		    (lpixel == _ICOLORMAP->pixels[i]) ) break ;
	}
	if( i < _ICOLORMAP->maxcolor ) {
	    *index = i ;
	} else {
	    /*ERROR*Bad Defined Color*/
	    Xw_set_error(41,"Xw_get_pixel",&index) ;
	    return (XW_ERROR) ;
	}

#ifdef  TRACE_GET_PIXEL
if( Xw_get_trace() > 2 ) {
    printf (" Xw_get_pixel(%lx,%d,%d,%ld,%ld)\n",
					(long ) pimage,x,y,(long ) index,(long ) npixel) ;
}
#endif

	return (XW_SUCCESS);
}
Commit	Line	Data
b311480e	1	// Copyright (c) 1999-2012 OPEN CASCADE SAS
	2	//
	3	// The content of this file is subject to the Open CASCADE Technology Public
	4	// License Version 6.5 (the "License"). You may not use the content of this file
	5	// except in compliance with the License. Please obtain a copy of the License
	6	// at http://www.opencascade.org and read it completely before using this file.
	7	//
	8	// The Initial Developer of the Original Code is Open CASCADE S.A.S., having its
	9	// main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France.
	10	//
	11	// The Original Code and all software distributed under the License is
	12	// distributed on an "AS IS" basis, without warranty of any kind, and the
	13	// Initial Developer hereby disclaims all such warranties, including without
	14	// limitation, any warranties of merchantability, fitness for a particular
	15	// purpose or non-infringement. Please see the License for the specific terms
	16	// and conditions governing the rights and limitations under the License.
	17
7fd59977	18
	19	#include <Xw_Extension.h>
	20
b311480e	21	/* ifdef then trace on */
7fd59977	22	#ifdef TRACE
	23	#define TRACE_GET_PIXEL
	24	#endif
	25
	26	/*
	27	STATUS Xw_get_pixel (aimage,x,y,index,npixel):
	28	XW_EXT_IMAGEDATA *aimage
	29	int x,y Pixel position
	30	int *index return Pixel color index
	31	int *npixel return Pixel number filled with
	32	the same color index
	33
	34	Extract pixels index from an existing IMAGE created by Xw_get_image
	35	or fill with Xw_put_pixel
	36
	37	returns ERROR if No image is defined
	38	or No pixel color is defined
	39	or Pixel position is wrong (Outside of image)
	40	returns SUCCESS if successful
	41
	42	*/
	43
	44	#ifdef XW_PROTOTYPE
	45	XW_STATUS Xw_get_pixel (void* aimage,int x,int y,int* index,int* npixel)
	46	#else
	47	XW_STATUS Xw_get_pixel (aimage,x,y,index,npixel)
	48	XW_EXT_IMAGEDATA *aimage ;
	49	int x,y ;
	50	int index,npixel ;
	51	#endif /XW_PROTOTYPE/
	52	{
	53	XW_EXT_IMAGEDATA pimage = (XW_EXT_IMAGEDATA) aimage ;
	54	register union {
	55	char *data ;
	56	unsigned char *cdata ;
	57	unsigned short *sdata ;
	58	unsigned long *ldata ;
	59	} data ;
	60	int i=0,fpixel,simage ;
	61	unsigned long lpixel=0 ;
	62	XImage *pximage;
	63
	64	if( !Xw_isdefine_image(pimage) ) {
	65	/ERRORBad EXT_IMAGEDATA Address*/
	66	Xw_set_error(25,"Xw_get_pixel",pimage) ;
	67	return (XW_ERROR) ;
	68	}
	69
	70	pximage = (_ZIMAGE) ? _ZIMAGE : _IIMAGE;
	71	fpixel = x*pximage->width + y ;
	72	simage = pximage->height*pximage->width ;
	73
	74	if( x < 0 \|\| y < 0 \|\| (fpixel >= simage) ) {
	75	/ERRORBad PIXEL position*/
	76	Xw_set_error(47,"Xw_get_pixel",&simage) ;
	77	return (XW_ERROR) ;
	78	}
	79
	80	switch (pximage->bitmap_pad) {
	81	case 8 :
	82	{ register unsigned char cpixel ;
	83	data.data = pximage->data + (fpixel) ; simage -= fpixel ;
	84	cpixel = *data.cdata ;
	85	for( i=1 ; i<simage ; i++ ) {
86	data.cdata++ ;
87	if( *data.cdata != cpixel ) break ;
88	}
89	}
90	break ;
91	case 16 :
92	{ register unsigned short spixel ;
93	data.data = pximage->data + (fpixel<<1) ; simage -= fpixel ;
94	spixel = *data.sdata ;
95	for( i=1 ; i<simage ; i++ ) {
96	data.sdata++ ;
97	if( *data.sdata != spixel ) break ;
98	}
99	}
100	break ;
101	case 32 :
102	data.data = pximage->data + (fpixel<<2) ; simage -= fpixel;
103	lpixel = *data.ldata ;
104	for( i=1 ; i<simage ; i++ ) {
105	data.ldata++ ;
106	if( *data.ldata != lpixel ) break ;
107	}
108	}
109
110	*npixel = i ;
111	*index = lpixel ;
112	for( i=0 ; i<_ICOLORMAP->maxcolor ; i++ ) {
113	if( _ICOLORMAP->define[i] &&
114	(lpixel == _ICOLORMAP->pixels[i]) ) break ;
115	}
116	if( i < _ICOLORMAP->maxcolor ) {
117	*index = i ;
118	} else {
119	/ERRORBad Defined Color*/
120	Xw_set_error(41,"Xw_get_pixel",&index) ;
121	return (XW_ERROR) ;
122	}
123
124	#ifdef TRACE_GET_PIXEL
125	if( Xw_get_trace() > 2 ) {
126	printf (" Xw_get_pixel(%lx,%d,%d,%ld,%ld)\n",
127	(long ) pimage,x,y,(long ) index,(long ) npixel) ;
128	}
129	#endif
130
131	return (XW_SUCCESS);
132	}