JPEGView/Source/C/JPEGViewGlobals.c

/*********************************************************/
/* This source code copyright (c) 1991-2001, Aaron Giles */
/* See the Read Me file for licensing information.       */
/* Contact email: mac@aarongiles.com                     */
/*********************************************************/

#if THINK_C
#include "THINK.Header"
#elif applec
#pragma load ":Headers:MPW.Header"
#elif __MWERKS__
//#include "MW.Header"
#else
#include "JPEGView.h"
#endif

AEIdleUPP gAEIdleProc;
ICMProgressUPP gGenericProgress, gSlideProgress, gDrawProgress;
UserItemUPP gOutlineOK, gPopUpMenuBox, gLineItem;
ModalFilterUPP gGenericFilter;
ModalFilterYDUPP gOpenSaveModalFilter;

/*
 * Global flags
 *
 */
 
Boolean
	gInAppleEvent = false,	// true if we're operating from within an AppleEvent
	gInBackground = false,	// true if we're running in the background
	gDone = false,			// true to break out of the main event loop & exit JPEGView
	gMenuVisible = true,	// true if the menubar is visible to the user
	gMenuEnabled = true,	// true if the menus are currently enabled
	gCommentsOpen = false,	// true if the user has opened the comments window
	gHidden = false,		// true if we've hidden our windows
	gGetAbout = false,		// true if we're to open an about box
	gScreenSaver = false,	// true if we're running the slide show as a screen saver
	gSlideFolderValid = false,// true if the slide show folder is valid
	gFoundOSL = true,		// true if we have the Object Support Library
	gDragMgrPresent = false,// true if the Drag Manager is available
	gHelpFound = false;		// true if the help file was found

/*
 * Default preferences
 *
 */

PrefsData 
	gThePrefs = {
		kPrefsVersion,		// Version number
		sizeof(PrefsData),	// Prefs size
		osDeepest,			// Open on deepest screen by default
		true,				// Choose color screens over B&W
		ofNever,			// Never open in full screen
		false,				// Don't expand small images
		false,				// Allow multiple images simultaneously
		iqVHigh,			// Very high quality by default
		true,				// Update background images
		aqOnly,				// Quantize only if there isn't a CLUT
		true,				// Dither quantized images
		true,				// Use image palette by default
		true,				// Restore colors by default
		ubOptional,			// Use bitmaps only if enough memory
		false,				// Not at original size
		false,				// Use bitmaps for uncompressed PICTs as well
		true,				// Automatically fix files types
		false,				// But don't change creators
		sqOnly,				// Only save CLUT if there isn't one already
		false,				// Don't save as PICT by default
		true,				// Save previews by default
		true,				// Compress JFIF previews by default
		true,				// Make custom icons by default
		isSquareDog,		// Square icon style
		swOpen,				// Start with Open dialog
		true,				// No automatic comments window
		bgReasonable,		// Give a reasonable amount of time to BG apps
#if defined(powerc) || defined(__powerc)
		false,				// Use IJG code for JPEG decompression
#else
		true,				// Use QuickTime for JPEG decompression by default
#endif
							//----------------------------------------
		1,					// Initial help section
		1,					// Initial prefs section
		true,				// Stats initially zoomed
		99,					// Initial countdown for nags
							//----------------------------------------
		false,				// Stats initially not visible
		false,				// Same for comments
		false,				// Same for colors
		{ 0, 0, 0, 0 },		// Set window bounds to 0 to default to
		{ 0, 0, 0, 0 },		//    a reasonable position
		{ 0, 0, 0, 0 },		//
		{ 0, 0, 0, 0 },		//
		{ 0, 0, 0, 0 },		//
		{ 0, 0, 0, 0 },		//
		{ 0, 0, 0, 0 },		//
		{ 0, 0, 0, 0 }		//
	};

SlideOptions
	gDefaultSlideOptions = {
		false,				// Not user-controlled
		30,					// 30-second slide show delay
		true,				// Shuffle up the slides
		true,				// Repeat indefinitely
		true,				// Don't report minor errors
		true,				// Hide the windoids
		false,				// Don't hide the controls
		false,				// Don't show comments
		false,				// Disk-based slide show
		false,				// Don't scan recursively
		false,				// Don't import other files
		true,				// Show filenames
		true				// Render offscreen first
	};

SlideOptionsHandle
	gSlideOptions;

/*
 * Image format routines
 *
 */

ImageFormat
	gPICTFormat = {
		kPICTType, 0, kPICTType,
		kStandardQTPreview, kCanSaveQuantization, kCanSaveBanded, kIDIsPositive,
		"\p",
		(idImagePtr)idPICT,
		(LoadImagePtr)LoadPICT,
		(OpenImagePtr)OpenPICT, 
		(DrawImagePtr)DrawPICT, 
		(FixImagePtr)FixPICT,
		(SaveImagePtr)SavePICT,
		(CloneImagePtr)nil,
		(CloseImagePtr)nil
	},

	gJFIFFormat = {
		kJPEGType, kJFIFType, kJPEGType,
		kCustomPreview, kCanSaveQuantization, kCantSaveBanded, kIDIsPositive,
		"\p",
		(idImagePtr)idJPEG,
		(LoadImagePtr)nil,
		(OpenImagePtr)OpenJPEG,
		(DrawImagePtr)DrawJPEG, 
		(FixImagePtr)FixJPEG,
		(SaveImagePtr)SaveJPEG,
		(CloneImagePtr)nil,
		(CloseImagePtr)nil
	},

	gGIFFormat = {
		kGIFType, 0, kGIFType,
		kStandardQTPreview, kCantSaveQuantization, kCantSaveBanded, kIDIsPositive,
		"\p",
		(idImagePtr)idGIF,
		(LoadImagePtr)nil,
		(OpenImagePtr)OpenGIF,
		(DrawImagePtr)DrawGIF, 
		(FixImagePtr)nil,
		(SaveImagePtr)nil,
		(CloneImagePtr)nil,
		(CloseImagePtr)nil
	},

	gTIFFFormat = {
		kTIFFType, 0, kTIFFType,
		kStandardQTPreview, kCantSaveQuantization, kCantSaveBanded, kIDIsPositive,
		"\p",
		(idImagePtr)idTIFF,
		(LoadImagePtr)nil,
		(OpenImagePtr)OpenTIFF,
		(DrawImagePtr)DrawTIFF, 
		(FixImagePtr)nil,
		(SaveImagePtr)nil,
		(CloneImagePtr)CloneTIFF,
		(CloseImagePtr)CloseTIFF
	},
	
	gBMPFormat = {
		kBMPType, 0, kBMPType,
		kStandardQTPreview, kCantSaveQuantization, kCantSaveBanded, kIDIsPositive,
		"\p",
		(idImagePtr)idBMP,
		(LoadImagePtr)nil,
		(OpenImagePtr)OpenBMP,
		(DrawImagePtr)DrawBMP,
		(FixImagePtr)nil,
		(SaveImagePtr)nil,
		(CloneImagePtr)CloneBMP,
		(CloseImagePtr)CloseBMP
	},
	
	gSCRNFormat = {
		kSCRNType, 0, kSCRNType,
		kStandardQTPreview, kCanSaveQuantization, kCanSaveBanded, kIDIsPossible,
		"\p",
		(idImagePtr)idSCRN,
		(LoadImagePtr)LoadSCRN,
		(OpenImagePtr)OpenSCRN, 
		(DrawImagePtr)DrawSCRN,
		(FixImagePtr)nil,
		(SaveImagePtr)SaveSCRN,
		(CloneImagePtr)nil,
		(CloseImagePtr)nil
	},

	gPNTGFormat = {
		kPNTGType, 0, kPNTGType,
		kStandardQTPreview, kCantSaveQuantization, kCantSaveBanded, kIDIsPossible,
		"\p",
		(idImagePtr)idPNTG,
		(LoadImagePtr)nil,
		(OpenImagePtr)OpenPNTG, 
		(DrawImagePtr)DrawPNTG,
		(FixImagePtr)nil,
		(SaveImagePtr)nil,
		(CloneImagePtr)nil,
		(CloseImagePtr)nil
	},

	gPICTRFormat = {
		0, 0, kSCRNType,
		kStandardQTPreview, kCanSaveQuantization, kCanSaveBanded, kIDIsPossible,
		"\p",
		(idImagePtr)nil,
		(LoadImagePtr)nil,
		(OpenImagePtr)nil, 
		(DrawImagePtr)nil,
		(FixImagePtr)FixSCRN,
		(SaveImagePtr)SaveSCRN,
		(CloneImagePtr)nil,
		(CloseImagePtr)nil
	};

ImageFormatPtr 
	gFormat[kFileFormats] = { 
		&gPICTFormat, 
		&gJFIFFormat, 
		&gGIFFormat,
		&gTIFFFormat,
		&gBMPFormat,
		&gSCRNFormat,
		&gPNTGFormat,
		&gPICTRFormat
	};
	
/*
 * RGB Color Specs
 *
 */

RGBColor 
	gBlack = { 0x0000, 0x0000, 0x0000 }, 	// Black
	gWhite = { 0xffff, 0xffff, 0xffff }, 	// White
	gFGrey = { 0x1111, 0x1111, 0x1111 }; 	// Windowframe Grey

/*
 * Other globals
 *
 */

#if defined(powerc) || defined(__powerc)
#ifndef __MWERKS__
QDGlobals qd;
#endif
#endif

NMRec
	gTheNotification;		// Notification Mgr. record

THPrint
	gPrintRecord = nil;		// the global print record

ImageHandle
	gDrawing = nil,			// handle to image we're currently drawing
	gImageRoot = nil;		// pointer to the root of the linked list of images

MonitorHandle
	gMainMonitor = nil;		// pointer to the main monitor; also head of linked list

MenuHandle 
	gAppleMenu;				// handle to the Apple menu

CursHandle 
	gCross, 				// handle to the cross cursor
	gHand,					// handle to the hand cursor
	gSize;					// handle to the size-box cursor

PaletteHandle 
	gColorPalette[9], 		// handle to color palettes of varying depths (1,2,4,8)
	gGreyPalette[9];		// handle to greyscale palettes of varying depths (4,8)

DialogRecord
	*gPortPool;				// pointer to the pool of WindowPtrs we have

GWorldPtr 
	gGenericGWorld,			// pointer to the generic GWorld
	gPreviewGWorld,			// pointer to the preview GWorld
	gIconGWorld;			// pointer to the icon GWorld

CodecInfo 
	gJPEGInfo;				// the codec information record for the JPEG codec

PrefsData 
	gOldPrefs;				// area for temporarily holding the old preferences data

StringPtr
	gString[kNumStrings],	// pointers to all our resource-based strings
	gNullString = (StringPtr)"\p";	// a null string

NestedProgress
	gDummyProg = { { nil, 0 }, 0, 0L, 0x10000L, false };
							// Dummy progress procedure

FSSpec
	gSlideSpec;				// file specification of 

Point
	gScreenSaverPoint;		// initial location of the mouse when slide show started

Handle
	gIconSuite = nil;		// handle to the JPEGView application icon suite

long 
	gQTVersion = 0,			// the version of QuickTime we found
	gBadWindowID,			// ID of the window we were unable to find (for Open events)
	gMemSlop = 96L * 1024L;	// amount of memory to reserve for internal buffer use

short 
	gTitleBarHeight,		// height of a window's titlebar
	gMenuHeight,			// the original height of the menubar
	gIntError = 0,			// internal error number
	gPendingButton = -1,	// pending slide show button
	gHelpItem;				// item number of our JPEGView Help

short
	*gErrTable = nil;		// pointer to table for truncating dithering errors

uchar
	*gScaleTable,			// pointer to a table for fast scaling
	gThousandsSep = ',',	// character for thousands separation
	gDecimal = '.',			// character for decimal point
	gListSep = ',';			// character for list separation

char
	gSlideShow = 0;			// status of the slide show