WebSVN – filter_foundry – Blame – /trunk/preview.c

Rev	Author	Line No.	Line
2	toby	1	/*
18	toby	2	This file is part of Filter Foundry, a filter plugin for Adobe Photoshop
94	toby	3	Copyright (C) 2003-7 Toby Thain, toby@telegraphics.com.au
2	toby	4
		5	This program is free software; you can redistribute it and/or modify
		6	it under the terms of the GNU General Public License as published by
		7	the Free Software Foundation; either version 2 of the License, or
		8	(at your option) any later version.
		9
		10	This program is distributed in the hope that it will be useful,
		11	but WITHOUT ANY WARRANTY; without even the implied warranty of
		12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		13	GNU General Public License for more details.
		14
		15	You should have received a copy of the GNU General Public License
		16	along with this program; if not, write to the Free Software
		17	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
		18	*/
		19
		20	/* This is PLATFORM INDEPENDENT user interface code - mainly dialog logic */
		21
94	toby	22	#include "preview.h"
2	toby	23
94	toby	24	#ifdef MAC_ENV
		25	#include <fp.h>
		26	#endif
		27	#include <math.h>
		28
29	toby	29	#include "PIProperties.h"
2	toby	30
94	toby	31	extern FilterRecordPtr gpb;
2	toby	32
		33	PSPixelMap preview_pmap;
		34	PSPixelMask preview_pmask;
		35	Handle preview_handle;
		36	UIRECT preview_rect;
94	toby	37	int preview_w,preview_h,previewerr = false,needall = false,needinput = true;
2	toby	38	Point preview_scroll;
		39	Boolean preview_complete = false;
94	toby	40	double zoomfactor,fitzoom;
2	toby	41
94	toby	42	Boolean setup_preview(FilterRecordPtr pb, int nplanes){
		43	double zh,zv;
		44
2	toby	45	if(pb->displayPixels && pb->advanceState){
89	toby	46	preview_w = MIN(preview_rect.right - preview_rect.left - 2,
		47	pb->filterRect.right - pb->filterRect.left);
		48	preview_h = MIN(preview_rect.bottom - preview_rect.top - 2,
		49	pb->filterRect.bottom - pb->filterRect.top);
94	toby	50	zh = (pb->filterRect.right - pb->filterRect.left)/(double)preview_w;
		51	zv = (pb->filterRect.bottom - pb->filterRect.top)/(double)preview_h;
		52	fitzoom = zh > zv ? zh : zv;
2	toby	53
		54	preview_pmap.version = 1;
		55	preview_pmap.bounds.left = preview_pmap.bounds.top = 0;
		56	preview_pmap.bounds.right = preview_w;
		57	preview_pmap.bounds.bottom = preview_h;
94	toby	58	preview_pmap.imageMode = pb->imageMode;
2	toby	59	preview_pmap.rowBytes = nplanes*preview_w;
		60	preview_pmap.colBytes = nplanes;
		61	preview_pmap.planeBytes = 1; /interleaved/
		62	// preview_pmap.baseAddr = preview_data;
		63	/* baseAddr must be set before using pixelmap */
		64
		65	//---------------------------------------------------------------------------
		66	// Fields new in version 1:
		67	//---------------------------------------------------------------------------
		68	preview_pmap.mat = NULL;
		69
94	toby	70	if( (pb->imageMode == plugInModeRGBColor && nplanes == 4)
		71	\|\| (pb->imageMode == plugInModeLabColor && nplanes == 4)
		72	\|\| (pb->imageMode == plugInModeGrayScale && nplanes == 2)
		73	\|\| (pb->imageMode == plugInModeDuotone && nplanes == 2) )
89	toby	74	{
2	toby	75	preview_pmask.next = NULL;
		76	// preview_pmask.maskData = preview_data+3;
		77	preview_pmask.rowBytes = preview_pmap.rowBytes;
		78	preview_pmask.colBytes = nplanes;
		79	preview_pmask.maskDescription = kSimplePSMask;
		80	preview_pmap.masks = &preview_pmask;
		81	}else
		82	preview_pmap.masks = NULL;
		83
		84	preview_handle = PINEWHANDLE((long)preview_h * preview_pmap.rowBytes);
		85	}else
		86	preview_handle = NULL;
		87	return preview_handle != NULL;
		88
		89	//---------------------------------------------------------------------------
		90	// Fields new in version 2:
		91	//---------------------------------------------------------------------------
		92	// preview_pmap.pixelOverlays;
		93	// preview_pmap.colorManagementOptions;
		94	}
		95
		96	void dispose_preview(){
		97	if(preview_handle){
		98	PIDISPOSEHANDLE(preview_handle);
		99	preview_handle = NULL;
		100	}
		101	}
		102
		103	void recalc_preview(FilterRecordPtr pb,DIALOGREF dp){
		104	OSErr e;
45	toby	105	int j,n,scaledw,scaledh,imgw,imgh;
2	toby	106	Rect r,outRect;
		107	Ptr outrow;
		108
37	toby	109	preview_complete = false;
		110
2	toby	111	if(preview_handle){
		112	/* size of previewed area, of source image; but no larger than filtered area (selection) */
		113	scaledw = zoomfactor*preview_w;
		114	if(scaledw > (pb->filterRect.right - pb->filterRect.left))
89	toby	115	scaledw = pb->filterRect.right - pb->filterRect.left;
2	toby	116	scaledh = zoomfactor*preview_h;
		117	if(scaledh > (pb->filterRect.bottom - pb->filterRect.top))
89	toby	118	scaledh = pb->filterRect.bottom - pb->filterRect.top;
2	toby	119
		120	/* scale clipped preview area down again - this becomes the pixel size of preview */
		121	imgw = scaledw/zoomfactor;
		122	if(imgw > preview_w)
		123	imgw = preview_w;
		124	imgh = scaledh/zoomfactor;
		125	if(imgh > preview_h)
		126	imgh = preview_h;
		127
		128	// Use to set the phase of the checkerboard:
		129	preview_pmap.maskPhaseRow = preview_scroll.v/zoomfactor;
		130	preview_pmap.maskPhaseCol = preview_scroll.h/zoomfactor;
		131
		132	/* compute source data rectangle (inRect) */
		133
		134	/* centre preview on filtered part of input image, adding scroll offset */
53	toby	135	r.left = (pb->filterRect.left + pb->filterRect.right - scaledw)/2 + preview_scroll.h;
2	toby	136	/* make sure it does not go outside the input area */
		137	if(r.left < pb->filterRect.left)
		138	r.left = pb->filterRect.left;
		139	else if(r.left > pb->filterRect.right-scaledw)
53	toby	140	r.left = pb->filterRect.right - scaledw;
2	toby	141	r.right = r.left + scaledw;
		142
		143	/* now compute for vertical */
94	toby	144	r.top = (pb->filterRect.top + pb->filterRect.bottom - scaledh)/2 + preview_scroll.v;
2	toby	145	if(r.top < pb->filterRect.top)
		146	r.top = pb->filterRect.top;
		147	else if(r.top > pb->filterRect.bottom-scaledh)
53	toby	148	r.top = pb->filterRect.bottom - scaledh;
2	toby	149	r.bottom = r.top + scaledh;
		150
		151	/* if formulae need random access to image - src(), rad() - we must request entire area: */
94	toby	152	if(needall)
2	toby	153	SETRECT(pb->inRect,0,0,pb->imageSize.h,pb->imageSize.v);
94	toby	154	else
2	toby	155	pb->inRect = r;
		156
		157	pb->outRect = pb->inRect;
		158	SETRECT(pb->maskRect,0,0,0,0);
		159	pb->inLoPlane = pb->outLoPlane = 0;
		160	pb->inHiPlane = pb->outHiPlane = nplanes-1;
37	toby	161
2	toby	162	if( !needinput \|\| !(e = pb->advanceState()) ){
		163	Ptr outptr = PILOCKHANDLE(preview_handle,false);
53	toby	164	int blankrows = (preview_h - imgh)/2,
89	toby	165	blankcols = (preview_w - imgw)/2,
		166	pmrb = preview_pmap.rowBytes;
2	toby	167
94	toby	168	evalinit();
2	toby	169
		170	SETRECT(outRect,0,0,imgw,imgh);
		171
53	toby	172	e = process_scaled(pb, false, &r, &outRect,
		173	outptr + pmrbblankrows + nplanesblankcols, pmrb, zoomfactor);
2	toby	174	if(blankrows){
53	toby	175	memset(outptr, 0xff, pmrb*blankrows);
2	toby	176	n = preview_h - blankrows - imgh; /* blank rows below preview */
53	toby	177	memset(outptr + pmrb(blankrows+imgh), 0xff, pmrbn);
2	toby	178	}
		179	if(blankcols){
		180	n = preview_w - blankcols - imgw; /* blank columns on right side of preview */
53	toby	181	outrow = outptr + pmrb*blankrows;
94	toby	182	for(j = blankrows; j < preview_h - blankrows; ++j){
53	toby	183	memset(outrow, 0xff, nplanes*blankcols);
		184	memset(outrow + nplanes(blankcols+imgw), 0xff, nplanesn);
		185	outrow += pmrb;
2	toby	186	}
		187	}
		188
		189	if(!e){
		190	preview_complete = true;
		191
		192	#ifdef WIN_ENV
		193	{
		194	extern HWND preview_hwnd;
		195	HDC hdc = GetDC(preview_hwnd);
89	toby	196
2	toby	197	drawpreview(dp,hdc,outptr);
		198
		199	ReleaseDC(preview_hwnd,hdc);
		200	}
		201	#else
		202	{
		203	GrafPtr saveport;
		204
		205	GetPort(&saveport);
		206	SetPortDialogPort(dp);
		207
		208	drawpreview(dp,NULL,outptr);
		209
		210	SetPort(saveport);
		211	}
		212	#endif
		213	}
		214
		215	PIUNLOCKHANDLE(preview_handle);
94	toby	216	}
2	toby	217
37	toby	218	if(e && !previewerr){
39	toby	219	alertuser("Could not build preview at chosen zoom level.",
94	toby	220	e == memFullErr && !needall ? "The image is too large for available memory. Try zooming in.\nIf that does not help, Cancel and retry the filter." : "");
37	toby	221	previewerr = true;
2	toby	222	}
37	toby	223
2	toby	224	}
		225	}
		226
		227	OSErr drawpreview(DIALOGREF dp,void *hdc,Ptr imageptr){
		228	int32 watchsusp;
		229	OSErr e = noErr;
		230	VRect srcRect;
		231	UIRECT imagebounds;
		232
		233	if(preview_handle && preview_complete){
		234
		235	srcRect = preview_pmap.bounds;
		236
53	toby	237	imagebounds.left = (preview_rect.left + preview_rect.right - preview_w)/2;
		238	imagebounds.top = (preview_rect.top + preview_rect.bottom - preview_h)/2;
2	toby	239	imagebounds.right = imagebounds.left + preview_w;
		240	imagebounds.bottom = imagebounds.top + preview_h;
		241
89	toby	242	preview_pmap.baseAddr = imageptr;
94	toby	243	preview_pmask.maskData = imageptr+3; // FIXME: is this offset correct for all modes?!
2	toby	244
		245	if(gpb->propertyProcs->getPropertyProc){
		246	gpb->propertyProcs->getPropertyProc(kPhotoshopSignature,propWatchSuspension,0,&watchsusp,NULL);
		247	gpb->propertyProcs->setPropertyProc(kPhotoshopSignature,propWatchSuspension,0,watchsusp+1,NULL);
		248	}
89	toby	249
2	toby	250	e = gpb->displayPixels(&preview_pmap,&srcRect,imagebounds.top,imagebounds.left,hdc);
		251
		252	if(gpb->propertyProcs->getPropertyProc)
		253	gpb->propertyProcs->setPropertyProc(kPhotoshopSignature,propWatchSuspension,0,watchsusp,NULL);
		254	}
		255	return e;
		256	}

Subversion Repositories filter_foundry

filter_foundry/trunk/preview.c – Rev 94