/*
This file is part of Filter Foundry, a filter plugin for Adobe Photoshop
Copyright (C) 2003-7 Toby Thain, toby@telegraphics.com.au
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 of the License, 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* This is PLATFORM INDEPENDENT user interface code - mainly dialog logic */
#include "preview.h"
#ifdef MAC_ENV
#include <fp.h>
#endif
#include <math.h>
#include "PIProperties.h"
extern FilterRecordPtr gpb;
PSPixelMap preview_pmap;
PSPixelMask preview_pmask;
Handle preview_handle;
UIRECT preview_rect;
int preview_w,preview_h,previewerr = false,needall = false,needinput = true;
Point preview_scroll;
Boolean preview_complete = false;
double zoomfactor,fitzoom;
Boolean setup_preview(FilterRecordPtr pb, int nplanes){
double zh,zv;
if(pb->displayPixels && pb->advanceState){
preview_w = MIN(preview_rect.right - preview_rect.left - 2,
pb->filterRect.right - pb->filterRect.left);
preview_h = MIN(preview_rect.bottom - preview_rect.top - 2,
pb->filterRect.bottom - pb->filterRect.top);
zh = (pb->filterRect.right - pb->filterRect.left)/(double)preview_w;
zv = (pb->filterRect.bottom - pb->filterRect.top)/(double)preview_h;
fitzoom = zh > zv ? zh : zv;
preview_pmap.version = 1;
preview_pmap.bounds.left = preview_pmap.bounds.top = 0;
preview_pmap.bounds.right = preview_w;
preview_pmap.bounds.bottom = preview_h;
preview_pmap.imageMode = pb->imageMode;
preview_pmap.rowBytes = nplanes*preview_w;
preview_pmap.colBytes = nplanes;
preview_pmap.planeBytes = 1; /*interleaved*/
// preview_pmap.baseAddr = preview_data;
/* baseAddr must be set before using pixelmap */
//---------------------------------------------------------------------------
// Fields new in version 1:
//---------------------------------------------------------------------------
preview_pmap.mat = NULL;
if( (pb->imageMode == plugInModeRGBColor && nplanes == 4)
|| (pb->imageMode == plugInModeLabColor && nplanes == 4)
|| (pb->imageMode == plugInModeGrayScale && nplanes == 2)
|| (pb->imageMode == plugInModeDuotone && nplanes == 2) )
{
preview_pmask.next = NULL;
// preview_pmask.maskData = preview_data+3;
preview_pmask.rowBytes = preview_pmap.rowBytes;
preview_pmask.colBytes = nplanes;
preview_pmask.maskDescription = kSimplePSMask;
preview_pmap.masks = &preview_pmask;
}else
preview_pmap.masks = NULL;
preview_handle = PINEWHANDLE((long)preview_h * preview_pmap.rowBytes);
}else
preview_handle = NULL;
return preview_handle != NULL;
//---------------------------------------------------------------------------
// Fields new in version 2:
//---------------------------------------------------------------------------
// preview_pmap.pixelOverlays;
// preview_pmap.colorManagementOptions;
}
void dispose_preview(){
if(preview_handle){
PIDISPOSEHANDLE(preview_handle);
preview_handle = NULL;
}
}
void recalc_preview(FilterRecordPtr pb,DIALOGREF dp){
OSErr e;
int j,n,scaledw,scaledh,imgw,imgh;
Rect r,outRect;
Ptr outrow;
preview_complete = false;
if(preview_handle){
/* size of previewed area, of source image; but no larger than filtered area (selection) */
scaledw = zoomfactor*preview_w;
if(scaledw > (pb->filterRect.right - pb->filterRect.left))
scaledw = pb->filterRect.right - pb->filterRect.left;
scaledh = zoomfactor*preview_h;
if(scaledh > (pb->filterRect.bottom - pb->filterRect.top))
scaledh = pb->filterRect.bottom - pb->filterRect.top;
/* scale clipped preview area down again - this becomes the pixel size of preview */
imgw = scaledw/zoomfactor;
if(imgw > preview_w)
imgw = preview_w;
imgh = scaledh/zoomfactor;
if(imgh > preview_h)
imgh = preview_h;
// Use to set the phase of the checkerboard:
preview_pmap.maskPhaseRow = preview_scroll.v/zoomfactor;
preview_pmap.maskPhaseCol = preview_scroll.h/zoomfactor;
/* compute source data rectangle (inRect) */
/* centre preview on filtered part of input image, adding scroll offset */
r.left = (pb->filterRect.left + pb->filterRect.right - scaledw)/2 + preview_scroll.h;
/* make sure it does not go outside the input area */
if(r.left < pb->filterRect.left)
r.left = pb->filterRect.left;
else if(r.left > pb->filterRect.right-scaledw)
r.left = pb->filterRect.right - scaledw;
r.right = r.left + scaledw;
/* now compute for vertical */
r.top = (pb->filterRect.top + pb->filterRect.bottom - scaledh)/2 + preview_scroll.v;
if(r.top < pb->filterRect.top)
r.top = pb->filterRect.top;
else if(r.top > pb->filterRect.bottom-scaledh)
r.top = pb->filterRect.bottom - scaledh;
r.bottom = r.top + scaledh;
/* if formulae need random access to image - src(), rad() - we must request entire area: */
if(needall)
SETRECT(pb->inRect,0,0,pb->imageSize.h,pb->imageSize.v);
else
pb->inRect = r;
pb->outRect = pb->inRect;
SETRECT(pb->maskRect,0,0,0,0);
pb->inLoPlane = pb->outLoPlane = 0;
pb->inHiPlane = pb->outHiPlane = nplanes-1;
if( !needinput || !(e = pb->advanceState()) ){
Ptr outptr = PILOCKHANDLE(preview_handle,false);
int blankrows = (preview_h - imgh)/2,
blankcols = (preview_w - imgw)/2,
pmrb = preview_pmap.rowBytes;
evalinit();
SETRECT(outRect,0,0,imgw,imgh);
e = process_scaled(pb, false, &r, &outRect,
outptr + pmrb*blankrows + nplanes*blankcols, pmrb, zoomfactor);
if(blankrows){
memset(outptr
, 0xff, pmrb
*blankrows
);
n = preview_h - blankrows - imgh; /* blank rows below preview */
memset(outptr
+ pmrb
*(blankrows
+imgh
), 0xff, pmrb
*n
);
}
if(blankcols){
n = preview_w - blankcols - imgw; /* blank columns on right side of preview */
outrow = outptr + pmrb*blankrows;
for(j = blankrows; j < preview_h - blankrows; ++j){
memset(outrow
, 0xff, nplanes
*blankcols
);
memset(outrow
+ nplanes
*(blankcols
+imgw
), 0xff, nplanes
*n
);
outrow += pmrb;
}
}
if(!e){
preview_complete = true;
#ifdef WIN_ENV
{
extern HWND preview_hwnd;
HDC hdc = GetDC(preview_hwnd);
drawpreview(dp,hdc,outptr);
ReleaseDC(preview_hwnd,hdc);
}
#else
{
GrafPtr saveport;
GetPort(&saveport);
SetPortDialogPort(dp);
drawpreview(dp,NULL,outptr);
SetPort(saveport);
}
#endif
}
PIUNLOCKHANDLE(preview_handle);
}
if(e && !previewerr){
alertuser("Could not build preview at chosen zoom level.",
e == memFullErr && !needall ? "The image is too large for available memory. Try zooming in.\nIf that does not help, Cancel and retry the filter." : "");
previewerr = true;
}
}
}
OSErr drawpreview(DIALOGREF dp,void *hdc,Ptr imageptr){
int32 watchsusp;
OSErr e = noErr;
VRect srcRect;
UIRECT imagebounds;
if(preview_handle && preview_complete){
srcRect = preview_pmap.bounds;
imagebounds.left = (preview_rect.left + preview_rect.right - preview_w)/2;
imagebounds.top = (preview_rect.top + preview_rect.bottom - preview_h)/2;
imagebounds.right = imagebounds.left + preview_w;
imagebounds.bottom = imagebounds.top + preview_h;
preview_pmap.baseAddr = imageptr;
preview_pmask.maskData = imageptr+3; // FIXME: is this offset correct for all modes?!
if(gpb->propertyProcs->getPropertyProc){
gpb->propertyProcs->getPropertyProc(kPhotoshopSignature,propWatchSuspension,0,&watchsusp,NULL);
gpb->propertyProcs->setPropertyProc(kPhotoshopSignature,propWatchSuspension,0,watchsusp+1,NULL);
}
e = gpb->displayPixels(&preview_pmap,&srcRect,imagebounds.top,imagebounds.left,hdc);
if(gpb->propertyProcs->getPropertyProc)
gpb->propertyProcs->setPropertyProc(kPhotoshopSignature,propWatchSuspension,0,watchsusp,NULL);
}
return e;
}