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/* Panorama_Tools - Generate, Edit and Convert Panoramic Images
Copyright (C) 1998,1999 - Helmut Dersch der@fh-furtwangen.de
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
/*------------------------------------------------------------*/
// Program specific includes
#include "filter.h"
// Standard C includes
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
// Main entry for all Panorama Tools. Dispatches to individual tools using
// the selector entry.
// These globals are only used and valid during dialog set-up!
TrformStr *gTrPtr;
sPrefs *gsPrPtr;
void dispatch (TrformStr *TrPtr, sPrefs *spref)
{
panoPrefs prefs, *prPtr;
char version[10];
if( TrPtr->src->bitsPerPixel != 32 && TrPtr->src->bitsPerPixel != 24 &&
TrPtr->src->bitsPerPixel != 64 && TrPtr->src->bitsPerPixel != 48) // Only support 3/4 byte/short pixels
{
PrintError( "Please convert image to 24/32/48/64 bit pixelsize.");
PrintError( "Pixelsize is now %d", (int)TrPtr->src->bitsPerPixel );
TrPtr->success = 0;
return;
}
TrPtr->dest->bitsPerPixel = TrPtr->src->bitsPerPixel;
// Check version of preferences file
if( readPrefs( version, _version ) != 0 || strcmp( version, VERSION ) != 0 )
{
writePrefs( VERSION, _version );
SetSizeDefaults( spref);
writePrefs( (char*)spref, _sizep );
SetPrefDefaults( &prefs, _perspective );
writePrefs( (char*)&prefs.pP, _perspective );
SetPrefDefaults( &prefs, _correct );
writePrefs( (char*)&prefs.cP, _correct );
SetPrefDefaults( &prefs, _remap );
writePrefs( (char*)&prefs.rP, _remap );
SetPrefDefaults( &prefs, _adjust );
writePrefs( (char*)&prefs.aP, _adjust );
SetPrefDefaults( &prefs, _panleft );
writePrefs( (char*)&prefs.pc, _panleft );
}
// Read and/or set preferences; Do Xform
gTrPtr = TrPtr;
gsPrPtr = spref;
switch( TrPtr->mode & 7 )
{
case _interactive: // Display dialog, set prefs, Do Xform
if( readPrefs( (char*)spref, _sizep ) != 0 )
SetSizeDefaults( spref);
prPtr = &prefs;
if( readPrefs( (char*)prPtr, TrPtr->tool ) != 0 )
SetPrefDefaults( prPtr, TrPtr->tool);
if( !SetPrefs( prPtr ))
{
TrPtr->success = 0;
}
else
{
TrPtr->interpolator = spref->interpolator;
TrPtr->gamma = spref->gamma;
writePrefs( (char*)prPtr, TrPtr->tool );
writePrefs( (char*)spref, _sizep );
DoTransForm( TrPtr, prPtr );
}
break;
case _setprefs: // Display dialog, set prefs
if( readPrefs( (char*)spref, _sizep ) != 0 )
SetSizeDefaults( spref);
prPtr = &prefs;
if( readPrefs( (char*)prPtr, TrPtr->tool ) != 0 )
SetPrefDefaults( prPtr, TrPtr->tool);
if( SetPrefs( prPtr ) )
{
writePrefs( (char*)spref, _sizep );
writePrefs( (char*)prPtr, TrPtr->tool );
TrPtr->success = 1;
}
else
TrPtr->success = 0;
break;
case _useprefs: // Read prefs, do Xform
if( readPrefs( (char*)spref, _sizep ) != 0 )
SetSizeDefaults( spref);
prPtr = &prefs;
if( readPrefs( (char*)prPtr, TrPtr->tool ) != 0 )
SetPrefDefaults( prPtr, TrPtr->tool);
DoTransForm( TrPtr, prPtr );
break;
case _usedata: // ignore prefs, do Xform
prPtr = (panoPrefs *) TrPtr->data;
DoTransForm( TrPtr, prPtr );
break;
default: TrPtr->success = 0;
break;
}
return;
}
void DoTransForm( TrformStr *TrPtr, panoPrefs *prPtr )
{
// Dispatch to selected tool
switch( TrPtr->tool )
{
case _perspective:
perspective (TrPtr, &prPtr->pP);
break;
case _remap:
remap (TrPtr, &prPtr->rP);
break;
case _correct:
correct (TrPtr, &prPtr->cP);
break;
case _adjust:
adjust (TrPtr, &prPtr->aP);
break;
// case _interpolate:
// interp (TrPtr, &prPtr->iP);
// break;
case _panright:
case _panleft:
case _panup:
case _pandown:
case _zoomin:
case _zoomout:
case _apply:
case _getPano:
case _increment:
pan(TrPtr, &prPtr->pc);
break;
}
Progress( _disposeProgress, "" );
return;
}
void SetPrefDefaults(panoPrefs *prPtr, int selector)
{
// Dispatch to selected tool
switch( selector )
{
case _perspective:
SetPerspectiveDefaults( &prPtr->pP);
break;
case _remap:
SetRemapDefaults( &prPtr->rP);
break;
case _correct:
SetCorrectDefaults( &prPtr->cP);
break;
case _adjust:
SetAdjustDefaults( &prPtr->aP);
break;
// case _interpolate:
// SetInterpolateDefaults( &prPtr->iP );
// break;
case _panright:
case _panleft:
case _panup:
case _pandown:
case _zoomin:
case _zoomout:
case _apply:
case _getPano:
case _increment:
SetPanDefaults( &prPtr->pc );
break;
}
return;
}
void SetPanDefaults( panControls *pc)
{
pc->panAngle = 15.0;
pc->zoomFactor = 30.0;
}
int SetPrefs( panoPrefs *prPtr )
{
// Dispatch to selected tool
switch( gTrPtr->tool )
{
case _perspective:
return SetPerspectivePrefs ( &prPtr->pP );
break;
case _remap:
return SetRemapPrefs ( &prPtr->rP );
break;
case _correct:
return SetCorrectPrefs ( &prPtr->cP );
break;
case _adjust:
return SetAdjustPrefs ( &prPtr->aP );
break;
// case _interpolate:
// return SetInterpPrefs ( &prPtr->iP );
// break;
case _panright:
case _panleft:
case _panup:
case _pandown:
case _zoomin:
case _zoomout:
case _apply:
case _getPano:
case _increment:
return TRUE;
break;
}
return FALSE;
}
// Filter function; src and dest should be equal sized
void filter( TrformStr *TrPtr, flfn func, void* params, int color)
{
register int x, y; // Loop through destination image
register int i, col; // Auxilliary loop variables
int skip = 0; // Update progress counter
unsigned char *dest, *src; // Source and destination image data
char* progressMessage;// Message to be displayed by progress reporter
char percent[8]; // Number displayed by Progress reporter
int valid; // Is this pixel valid? (i.e. inside source image)
long coeff; // pixel coefficient in destination image
int xs, ys; // Source screen coordinates
// Variables used to convert screen coordinates to cartesian coordinates
int w2 = TrPtr->dest->width / 2.0 - 0.5; // Steve's L
int h2 = TrPtr->dest->height / 2.0 - 0.5;
// We can handle 3 and 4 Bytes/Pixel (and more, if exists).
int BytesPerPixel = TrPtr->src->bitsPerPixel / 8;
int FirstColorByte = BytesPerPixel - 3;
// Selection rectangle
PTRect destRect;
if( TrPtr->dest->selection.bottom == 0 && TrPtr->dest->selection.right == 0 ){
destRect.left = 0;
destRect.right = TrPtr->dest->width;
destRect.top = 0;
destRect.bottom = TrPtr->dest->height;
}else{
memcpy( &destRect, &TrPtr->dest->selection, sizeof(PTRect) );
}
dest = *TrPtr->dest->data;
src = *TrPtr->src->data; // is locked
if(TrPtr->mode & _show_progress){
switch(color){
case 0: progressMessage = "Image Conversion"; break;
case 1: switch( TrPtr->src->dataformat)
{
case _RGB: progressMessage = "Red Channel" ; break;
case _Lab: progressMessage = "Lightness" ; break;
} break;
case 2: switch( TrPtr->src->dataformat)
{
case _RGB: progressMessage = "Green Channel"; break;
case _Lab: progressMessage = "Color A" ; break;
} break;
case 3: switch( TrPtr->src->dataformat)
{
case _RGB: progressMessage = "Blue Channel"; break;
case _Lab: progressMessage = "Color B" ; break;
} break;
default: progressMessage = "Something is wrong here";
}
Progress( _initProgress, progressMessage );
}
for(y=destRect.top; y<destRect.bottom; y++){
// Update Progress report and check for cancel every 5 lines.
skip++;
if( skip == 5 )
{
if(TrPtr->mode & _show_progress)
{
sprintf( percent, "%d", (int) (y * 100)/ TrPtr->dest->height);
if( ! Progress( _setProgress, percent ) )
{
//myfree( (void**)TrPtr->dest->data );
TrPtr->success = 0;
return;
}
}
else
{
if( ! Progress( _idleProgress, 0) )
{
//myfree( (void**)TrPtr->dest->data );
TrPtr->success = 0;
return;
}
}
skip = 0;
}
for(x=destRect.left; x<destRect.right; x++)
{
xs = x; ys = y;
// Is the pixel valid, i.e. from within source image?
if( (xs >= TrPtr->src->width) || (ys >= TrPtr->src->height) )
valid = FALSE;
else
valid = TRUE;
// if alpha channel marks valid portions, set valid
if( (TrPtr->mode & _honor_valid) &&
(FirstColorByte == 1) &&
(src[ ys * TrPtr->src->bytesPerLine + BytesPerPixel * xs] == 0))
valid = FALSE;
// Check for and handle edge locations
if( xs < 0) xs = 0;
if( xs >= TrPtr->src->width ) xs = TrPtr->src->width -1;
if( ys < 0) ys = 0;
if( ys >= TrPtr->src->height ) ys = TrPtr->src->height -1;
// Calculate pixel coefficient in dest image just once
coeff = (y-destRect.top) * TrPtr->dest->bytesPerLine + BytesPerPixel * (x-destRect.left);
if( valid )
{
if( color == 0 ) // Convert all color channels equally
{
for( col = FirstColorByte; col < FirstColorByte + 3; col++)
{
dest[ coeff + col] = func( src[ ys * TrPtr->src->bytesPerLine + BytesPerPixel * xs + col ], x-w2, y-h2, params );
}
if( FirstColorByte == 1 )
dest[ coeff ] = 255; // Set alpha channel
}
else // Convert just one channel
{
col = (FirstColorByte ? color : color-1);
dest[ coeff + col] = func( src[ ys * TrPtr->src->bytesPerLine + BytesPerPixel * xs + col ], x-w2, y-h2, params );
if( FirstColorByte == 1 )
dest[ coeff ] = 255; // Set alpha channel
}
}
else
{
for(i = 0; i < 3 + FirstColorByte; i++)
dest[ coeff + i] = 0;
}
}
}
if(TrPtr->mode & _show_progress)
{
Progress( _disposeProgress, percent );
}
TrPtr->success = 1;
}
// Given source image and dest dimensions, set dest and
// allocate memory for dest->data
int SetDestImage( TrformStr *TrPtr, int width, int height)
{
int result = 0;
if( TrPtr->mode & _destSupplied )
return 0;
memcpy( TrPtr->dest, TrPtr->src, sizeof( Image ));
TrPtr->dest->width = width;
TrPtr->dest->height = height;
// bytesPerLine depending on image format
TrPtr->dest->bytesPerLine = TrPtr->dest->width * (TrPtr->dest->bitsPerPixel / 8) ;
TrPtr->dest->dataSize = TrPtr->dest->height * TrPtr->dest->bytesPerLine;
TrPtr->dest->data = (unsigned char**) mymalloc (TrPtr->dest->dataSize);
if( TrPtr->dest->data == NULL )
result = -1;
return result;
}
// Copy image data from src to dest with framing/cropping if sizes differ
// src and dest may differ in bytesPerPixel (3 and/or 4)
void CopyImageData( Image *dest, Image *src )
{
register unsigned char *in, *out;
register int x,y, dx, dy, id, is, i;
int bpp_s, bpp_d;
in = *(src->data);
out = *(dest->data);
dx = (src->width - dest->width) / 2;
dy = (src->height - dest->height) / 2;
bpp_s = src->bitsPerPixel / 8;
bpp_d = dest->bitsPerPixel / 8;
for( y = 0; y < dest->height; y++)
{
for( x = 0; x < dest->width; x++)
{
is = (y + dy) * src->bytesPerLine + bpp_s * (x + dx);
id = y * dest->bytesPerLine + bpp_d * x;
if( y + dy < 0 || y + dy >= src->height ||
x + dx < 0 || x + dx >= src->width ) // outside src; set dest = 0
{
i = bpp_d;
while( i-- > 0 ) out[ id++ ] = 0;
}
else // inside src; set dest = src
{
switch( bpp_d )
{
case 8: switch( bpp_s )
{
case 8: memcpy( out + id, in + is, 8 );
break;
case 6: out[id++] = 255U; out[id++] = 255U;
memcpy( out + id, in + is, 6 );
break;
case 4: out[id++] = in[ is++ ]; out[id++] = 0;
out[id++] = in[ is++ ]; out[id++] = 0;
out[id++] = in[ is++ ]; out[id++] = 0;
out[id++] = in[ is++ ]; out[id++] = 0;
break;
case 3: out[id++] = 255U; out[id++] = 255U;
out[id++] = in[ is++ ]; out[id++] = 0;
out[id++] = in[ is++ ]; out[id++] = 0;
out[id++] = in[ is++ ]; out[id++] = 0;
break;
}
break;
case 6: switch( bpp_s )
{
case 8: is += 2;
memcpy( out + id, in + is, 6 );
break;
case 6: memcpy( out + id, in + is, 6 );
break;
case 4: is++;
out[id++] = in[ is++ ]; out[id++] = 0;
out[id++] = in[ is++ ]; out[id++] = 0;
out[id++] = in[ is++ ]; out[id++] = 0;
break;
case 3: out[id++] = in[ is++ ]; out[id++] = 0;
out[id++] = in[ is++ ]; out[id++] = 0;
out[id++] = in[ is++ ]; out[id++] = 0;
break;
}
break;
case 4: switch( bpp_s )
{
case 8: out[id++] = in[ is++ ]; is++;
out[id++] = in[ is++ ]; is++;
out[id++] = in[ is++ ]; is++;
out[id++] = in[ is++ ]; is++;
break;
case 6: out[id++] = 255U;
out[id++] = in[ is++ ]; is++;
out[id++] = in[ is++ ]; is++;
out[id++] = in[ is++ ]; is++;
break;
case 4: memcpy( out + id, in + is, 4 );
break;
case 3: out[id++] = 255U;
memcpy( out + id, in + is, 3 );
break;
}
break;
case 3: switch( bpp_s )
{
case 8: is+=2;
out[id++] = in[ is++ ]; is++;
out[id++] = in[ is++ ]; is++;
out[id++] = in[ is++ ]; is++;
break;
case 6: out[id++] = in[ is++ ]; is++;
out[id++] = in[ is++ ]; is++;
out[id++] = in[ is++ ]; is++;
break;
case 4: is++;
memcpy( out + id, in + is, 3 );
break;
case 3: memcpy( out + id, in + is, 3 );
break;
}
break;
}
}
}
}
}
// expand image from 3 to 4 bytes per pixel. No pad bytes allowed.
// Memory must be allocated
void ThreeToFourBPP( Image *im ){
register int x,y,c1,c2;
if( im->bitsPerPixel == 32 || im->bitsPerPixel == 64) // Nothing to do
return;
if( im->bitsPerPixel == 24 ){ // Convert to 4byte / pixel
for( y = im->height-1; y>=0; y--){
for( x= im->width-1; x>=0; x--){
c1 = (y * im->width + x) * 4;
c2 = y * im->bytesPerLine + x * 3;
(*(im->data))[c1++] = UCHAR_MAX;
(*(im->data))[c1++] = (*(im->data))[c2++];
(*(im->data))[c1++] = (*(im->data))[c2++];
(*(im->data))[c1++] = (*(im->data))[c2++];
}
}
im->bitsPerPixel = 32;
im->bytesPerLine = im->width * 4;
}else if( im->bitsPerPixel == 48 ){ // Convert to 8byte / pixel
for( y = im->height-1; y>=0; y--){
for( x= im->width-1; x>=0; x--){
c1 = (y * im->width + x) * 4;
c2 = y * im->bytesPerLine/2 + x * 3;
((USHORT*)(*(im->data)))[c1++] = USHRT_MAX;
((USHORT*)(*(im->data)))[c1++] = ((USHORT*)(*(im->data)))[c2++];
((USHORT*)(*(im->data)))[c1++] = ((USHORT*)(*(im->data)))[c2++];
((USHORT*)(*(im->data)))[c1++] = ((USHORT*)(*(im->data)))[c2++];
}
}
im->bitsPerPixel = 64;
im->bytesPerLine = im->width * 8;
}
im->dataSize = im->height * im->bytesPerLine;
}
// eliminate alpha channel.
// pad bytes allowed
void FourToThreeBPP ( Image *im )
{
register int x,y,c1,c2;
if( im->bitsPerPixel == 24 || im->bitsPerPixel == 48 ) // Nothing to do
return;
if( im->bitsPerPixel == 32 ) // Convert to 3byte / pixel
{
register unsigned char *data = *(im->data);
for( y = 0; y < im->height; y++)
{
for( x=0; x < im->width; x++)
{
c1 = y * im->bytesPerLine + x * 4;
c2 = (y * im->width + x) * 3;
c1++;
data [c2++] = data [c1++];
data [c2++] = data [c1++];
data [c2++] = data [c1++];
}
}
im->bitsPerPixel = 24;
im->bytesPerLine = im->width * 3;
}
else if( im->bitsPerPixel == 64 )// Convert to 6byte / pixel
{
register USHORT *data = (USHORT*)*(im->data);
for( y = 0; y < im->height; y++)
{
for( x=0; x < im->width; x++)
{
c1 = y * im->bytesPerLine/2 + x * 4;
c2 = (y * im->width + x) * 3;
c1++;
data [c2++] = data [c1++];
data [c2++] = data [c1++];
data [c2++] = data [c1++];
}
}
im->bitsPerPixel = 48;
im->bytesPerLine = im->width * 6;
}
im->dataSize = im->height * im->bytesPerLine;
}
void OneToTwoByte( Image *im )
{
register int x,y,c1,c2,i;
int bpp;
if( im->bitsPerPixel > 32 ) return;
bpp = im->bitsPerPixel / 8;
for( y = im->height-1; y>=0; y--)
{
for( x= im->width-1; x>=0; x--)
{
c1 = ( y * im->width + x) * bpp * 2;
c2 = y * im->bytesPerLine + x * bpp;
for(i=0; i<bpp; i++)
{
*((USHORT*)(*im->data + c1)) = ((USHORT)(*(im->data))[c2++]) << 8; c1 += 2;
}
}
}
im->bitsPerPixel *= 2;
im->bytesPerLine = im->width * im->bitsPerPixel/8;
im->dataSize = im->height * im->bytesPerLine;
}
void TwoToOneByte( Image *im ){
register int x,y,c1,c2,i;
int bpp_old, bpp_new;
if( im->bitsPerPixel < 48 ) return;
bpp_old = im->bitsPerPixel / 8;
bpp_new = bpp_old / 2;
for( y = 0; y < im->height; y++){
for( x=0; x < im->width; x++){
c1 = (y * im->width + x) * bpp_new;
c2 = y * im->bytesPerLine + x * bpp_old;
for(i=0; i<bpp_new; i++){
(*(im->data))[c1++] = *((USHORT*)(*im->data + c2)) >> 8; c2 += 2;
}
}
}
im->bitsPerPixel /= 2;
im->bytesPerLine = im->width * im->bitsPerPixel/8;
im->dataSize = im->height * im->bytesPerLine;
}
void SetImageDefaults(Image *im){
im->data = NULL;
im->bytesPerLine = 0;
im->width = 0;
im->height = 0;
im->dataSize = 0;
im->bitsPerPixel = 0;
im->format = 0;
im->dataformat = _RGB;
im->hfov = 0.0;
im->yaw = 0.0;
im->pitch = 0.0;
im->roll = 0.0;
SetCorrectDefaults( &(im->cP) );
*(im->name) = 0;
im->selection.top = 0;
im->selection.bottom = 0;
im->selection.left = 0;
im->selection.right = 0;
}
// Copy all position related data
void CopyPosition( Image *to, Image *from ){
to->format = from->format;
to->hfov = from->hfov;
to->yaw = from->yaw;
to->pitch = from->pitch;
to->roll = from->roll;
memcpy(&(to->cP), &(from->cP), sizeof( cPrefs ) );
}
#ifndef abs
#define abs(a) ( (a) >= 0 ? (a) : -(a) )
#endif
#define EPSILON 1.0e-8
// Compare position data of two image
// return 0 if equal
// return +1 if only yaw differs
// return +2 if more differs
int PositionCmp( Image *im1, Image *im2 )
{
if( abs(im1->format - im2->format ) < EPSILON &&
abs(im1->hfov - im2->hfov ) < EPSILON &&
abs(im1->pitch - im2->pitch ) < EPSILON &&
abs(im1->roll - im2->roll ) < EPSILON &&
EqualCPrefs( &im1->cP, &im2->cP ) )
{
if( im1->yaw == im2->yaw )
return 0;
else
return 1;
}
else
{
return 2;
}
}
// Compare optimizable cprefs-parameters
int EqualCPrefs( cPrefs *c1, cPrefs *c2 )
{
if( abs(c1->radial_params[0][0] - c2->radial_params[0][0] ) < EPSILON &&
abs(c1->radial_params[0][1] - c2->radial_params[0][1] ) < EPSILON &&
abs(c1->radial_params[0][2] - c2->radial_params[0][2] ) < EPSILON &&
abs(c1->radial_params[0][3] - c2->radial_params[0][3] ) < EPSILON &&
abs(c1->vertical_params[0] - c2->vertical_params[0] ) < EPSILON &&
abs(c1->horizontal_params[0]- c2->horizontal_params[0] ) < EPSILON )
return TRUE;
else
return FALSE;
}
// Do these images have equal pixel sizes
int HaveEqualSize( Image *im1, Image *im2 )
{
if( (im1->bytesPerLine != im2->bytesPerLine) ||
(im1->width != im2->width) ||
(im1->height != im2->height) ||
(im1->dataSize != im2->dataSize) ||
(im1->bitsPerPixel != im2->bitsPerPixel) )
return FALSE;
else
return TRUE;
}
void SetSizeDefaults( sPrefs *pref)
{
pref->magic = 70; // File validity check; must be 70
pref->displayPart = TRUE; // Display cropped/framed image ?
pref->saveFile = FALSE; // Save to tempfile?
pref->launchApp = FALSE; // Open sFile ?
pref->interpolator = _poly3;
makePathForResult( &(pref->sFile) );
makePathToHost ( &(pref->lApp) );
pref->gamma = 1.0;
pref->noAlpha = FALSE; // Check only for Photoshop LE
pref->optCreatePano = TRUE;
}
void SetVRPanoOptionsDefaults( VRPanoOptions *v)
{
v->width = 400;
v->height = 300;
v->pan = 0.0;
v->tilt = 0.0;
v->fov = 45.0;
v->codec = 0;
v->cquality = 80;
v->progressive = FALSE;
}
// Crop Image to selection rectangle
int CropImage(Image *im, PTRect *r){
int x,y,i;
unsigned char *src, *dst, **data = NULL;
int width = r->right - r->left;
int height = r->bottom - r->top;
int bytesPerPixel = im->bitsPerPixel / 8 ;
int bytesPerLine = width * im->bitsPerPixel / 8 ;
int dataSize = bytesPerLine * height;
// Some checks first
if( r->left < 0 || r->left >im->width ||
r->right < 0|| r->right > im->width ||
r->left >= r->right||
r->top < 0 || r->top > im->height||
r->bottom < 0 || r->bottom > im->height ||
r->top >= r->bottom )
return -1;
data = (unsigned char**) mymalloc( dataSize );
if( data == NULL ) return;
for(y=0; y<height; y++){
for(x=0,
src=*im->data + (y+r->top)*im->bytesPerLine +r->left*bytesPerPixel,
dst = *data + y*bytesPerLine;
x<width; x++ ){
i = 0;
while( i++ < bytesPerPixel ) *dst++ = *src++;
}
}
myfree((void**)im->data);
im->data = data;
im->width = width;
im->height = height;
im->bytesPerLine = bytesPerLine;
im->dataSize = dataSize;
return 0;
}

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