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#if !defined( lint ) && !defined( SABER )
static const char sccsid[] = "@(#)magick.c 5.00 00/10/26 xlockmore";
#endif
/*-
* Utilities for Reading images using ImageMagick
*
* Copyright (c) 2000 by J.Jansen (joukj@hrem.nano.tudelft.nl)
*
* See xlock.c for copying information.
*
* Revision History:
* 26-Oct-00: Created
* 15-Mar-06: Corrected for other QuantumDepth than 8
* 04-Apr-06: Corrected for TrueColor visuals
*/
#include "xlock.h"
#ifdef USE_MAGICK
#undef inline
#include "magick.h"
XLockImage xlockimage;
int
MagickFileToImage(ModeInfo * mi, char *filename, XImage ** image ,
Colormap m_cmap )
{
Image* imageData = (Image*) NULL;
ImageInfo imageInfo;
ExceptionInfo exception;
PixelPacket* pixdata;
IndexPacket* tmpdata0;
int i, fuzz, depth, format;
unsigned long black, white, fgpix, bgpix;
XColor fgcol, bgcol;
unsigned long* pixel_num;
if ( MI_IS_VERBOSE( mi ) )
{
(void) printf ( "Reading image %s\n", filename );
}
/* Read image data from file */
/* PURIFY reports a memory leak on the next line */
GetImageInfo( &imageInfo );
imageInfo.dither = 0;
(void) strcpy( imageInfo.filename , filename );
GetExceptionInfo( &exception );
imageData = ReadImage ( &imageInfo, &exception );
if ( imageData == (Image*) NULL )
{
(void) fprintf ( stderr , "Error reading image %s\n", imageInfo.filename );
return MagickFileInvalid;
}
/* setup X-image */
xlockimage.width = imageData->columns;
xlockimage.height = imageData->rows;
xlockimage.depth = imageData->depth;
if ( MI_IS_VERBOSE( mi ) )
{
(void) printf ( "Image dimensions %d x %d, depth = %d\n",
xlockimage.width, xlockimage.height, xlockimage.depth );
}
depth = MI_DEPTH(mi);
if ( depth < 9 )
xlockimage.data = (unsigned char *) malloc((int) ( xlockimage.width *
xlockimage.height));
else
xlockimage.data = (unsigned char *) malloc((int) ( xlockimage.width *
xlockimage.height *
4 ));
if (!xlockimage.data)
{
(void) fprintf(stderr, "out of memory for Image file\n");
return MagickNoMemory;
}
format=(depth == 1) ? XYBitmap : ZPixmap;
if ( MI_IS_VERBOSE( mi ) )
(void) printf ( "XCreateImage depth = %d\n", depth );
if ( depth < 9 )
*image = XCreateImage( MI_DISPLAY(mi), MI_VISUAL(mi), depth, format, 0,
(char *) xlockimage.data, (int) xlockimage.width,
(int) xlockimage.height, 16, (int) xlockimage.width );
else
*image = XCreateImage( MI_DISPLAY(mi), MI_VISUAL(mi), depth, format, 0,
(char *) xlockimage.data, (int) xlockimage.width,
(int) xlockimage.height, 16, (int) xlockimage.width*4 );
if (!*image)
{
(void) fprintf(stderr, "could not create image from file\n");
return MagickColorError;
}
if ( imageData->colors == 0 )
{
PixelPacket* pixtmp;
/* PURIFY reports a memory leak on the next line */
AllocateImageColormap ( imageData , COLORMAP_SIZE );
pixdata = GetImagePixels( imageData , 0 , 0 , imageData->columns ,
imageData->rows );
imageData->colors = imageData->columns*imageData->rows;
tmpdata0 = (IndexPacket *) malloc((int) ( xlockimage.width *
xlockimage.height *
sizeof(IndexPacket)));
#if (QuantumDepth == 8)
for ( fuzz=0; imageData->colors > COLORMAP_SIZE; fuzz++ )
#elif (QuantumDepth == 16)
for ( fuzz=0; imageData->colors > COLORMAP_SIZE; fuzz+=256 )
#elif (QuantumDepth == 32)
for ( fuzz=0; imageData->colors > COLORMAP_SIZE; fuzz+=65536 )
#elif (QuantumDepth == 64)
for ( fuzz=0; imageData->colors > COLORMAP_SIZE; fuzz+=4294967296 )
#else
#error "ImageMagick configuration error"
#endif
{
int num_col , j , x , y;
pixtmp = pixdata;
num_col = 0;
for ( i=0; i<imageData->columns*imageData->rows; i++)
{
PixelPacket* pixtmp2;
pixtmp2 = imageData->colormap;
for ( j=0; j<num_col; j++ )
{
if ( ABS( pixtmp->red - pixtmp2->red ) +
ABS( pixtmp->green - pixtmp2->green ) +
ABS( pixtmp->blue - pixtmp2->blue ) < fuzz )
break;
pixtmp2++;
}
if ( j == num_col )
{
pixtmp2->red = pixtmp->red;
pixtmp2->green = pixtmp->green;
pixtmp2->blue = pixtmp->blue;
num_col++;
if ( num_col == COLORMAP_SIZE )
{
num_col++;
break;
}
}
tmpdata0[ i ] = j;
pixtmp++;
}
imageData->colors = num_col;
}
}
else
{
if ( imageData->colors > COLORMAP_SIZE )
{
imageData->colors = COLORMAP_SIZE;
(void) fprintf( stderr ,
"wrong colour reducing algorithm used\n" );
(void) fprintf( stderr ,
"Please notify the maintainer that this statement is reached\n" );
}
/* get pixel information */
if ( !( pixdata = GetImagePixels( imageData , 0 , 0 , imageData->columns ,
imageData->rows ) ) )
{
(void) fprintf( stderr , "Error getting pixels\n" );
return MagickFileInvalid;
}
tmpdata0 = GetIndexes ( imageData );
}
/*set up colourmap */
black = MI_BLACK_PIXEL(mi);
white = MI_WHITE_PIXEL(mi);
fgpix = MI_FG_PIXEL(mi);
bgpix = MI_BG_PIXEL(mi);
fgcol.pixel = fgpix;
bgcol.pixel = bgpix;
XQueryColor(MI_DISPLAY(mi), MI_COLORMAP(mi), &fgcol);
XQueryColor(MI_DISPLAY(mi), MI_COLORMAP(mi), &bgcol);
/* Set these, if Image does not overwrite some, so much the better. */
if (fgpix < COLORMAP_SIZE) {
xlockimage.red[fgpix] = fgcol.red >> 8;
xlockimage.green[fgpix] = fgcol.green >> 8;
xlockimage.blue[fgpix] = fgcol.blue >> 8;
}
if (bgpix < COLORMAP_SIZE) {
xlockimage.red[bgpix] = bgcol.red >> 8;
xlockimage.green[bgpix] = bgcol.green >> 8;
xlockimage.blue[bgpix] = bgcol.blue >> 8;
}
if (white < COLORMAP_SIZE) {
xlockimage.red[white] = 0xFF;
xlockimage.green[white] = 0xFF;
xlockimage.blue[white] = 0xFF;
}
if (black < COLORMAP_SIZE) {
xlockimage.red[black] = 0;
xlockimage.green[black] = 0;
xlockimage.blue[black] = 0;
}
/* supply data and colours*/
xlockimage.colors = imageData->colors;
pixel_num = malloc( imageData->colors * sizeof( unsigned long ) );
for ( i=0 ; i<xlockimage.colors ; i++ )
{
XColor Xcol;
#if (QuantumDepth == 8)
xlockimage.red[ i ] = imageData->colormap->red * 257;
xlockimage.green[ i ] = imageData->colormap->green *257;
xlockimage.blue[ i ] = imageData->colormap->blue * 257;
#elif (QuantumDepth == 16)
xlockimage.red[ i ] = imageData->colormap->red;
xlockimage.green[ i ] = imageData->colormap->green;
xlockimage.blue[ i ] = imageData->colormap->blue;
#elif (QuantumDepth == 32)
xlockimage.red[ i ] = imageData->colormap->red / 256;
xlockimage.green[ i ] = imageData->colormap->green / 256;
xlockimage.blue[ i ] = imageData->colormap->blue/ 256;
#elif (QuantumDepth == 64)
xlockimage.red[ i ] = imageData->colormap->red / 65537;
xlockimage.green[ i ] = imageData->colormap->green / 65537;
xlockimage.blue[ i ] = imageData->colormap->blue/ 65537;
#else
#error "ImageMagick configuration error"
#endif
Xcol.red = xlockimage.red[ i ];
Xcol.green = xlockimage.green[ i ];
Xcol.blue = xlockimage.blue[ i ];
XAllocColor( MI_DISPLAY(mi) , m_cmap , &Xcol);
pixel_num[i] = Xcol.pixel;
imageData->colormap++;
}
if ( MI_IS_VERBOSE( mi ) )
{
(void) printf ( "xlockimage.colors %d\n", xlockimage.colors );
}
/* Make sure there is a black ... */
if (xlockimage.colors <= 0xff)
xlockimage.red[0xff] = xlockimage.green[0xff] = xlockimage.blue[0xff] = 0;
{
IndexPacket* tmpdata;
int x , y;
tmpdata = tmpdata0;
for ( y=0; y<imageData->rows; y++ )
{
for ( x=0; x<imageData->columns; x++)
{
XPutPixel( *image , x , y , pixel_num[ tmpdata[ 0 ] ] );
tmpdata++;
}
}
free( tmpdata0 );
free( pixel_num );
}
/* clean up */
DestroyImage( imageData );
return MagickSuccess;
}
#endif /* USE_MAGICK */
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