/*
* $Id: xtiff.c,v 1.4 2013-05-02 14:44:29 tgl Exp $
*
* xtiff - view a TIFF file in an X window
*
* Dan Sears
* Chris Sears
*
* Copyright 1991 by Digital Equipment Corporation, Maynard, Massachusetts.
*
* All Rights Reserved
*
* Permission to use, copy, modify, and distribute this software and its
* documentation for any purpose and without fee is hereby granted,
* provided that the above copyright notice appear in all copies and that
* both that copyright notice and this permission notice appear in
* supporting documentation, and that the name of Digital not be
* used in advertising or publicity pertaining to distribution of the
* software without specific, written prior permission.
*
* DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
* ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
* DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
* ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
* WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
* ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
* SOFTWARE.
*
* Revision 1.0 90/05/07
* Initial release.
* Revision 2.0 90/12/20
* Converted to use the Athena Widgets and the Xt Intrinsics.
*
* Notes:
*
* According to the TIFF 5.0 Specification, it is possible to have
* both a TIFFTAG_COLORMAP and a TIFFTAG_COLORRESPONSECURVE. This
* doesn't make sense since a TIFFTAG_COLORMAP is 16 bits wide and
* a TIFFTAG_COLORRESPONSECURVE is tfBitsPerSample bits wide for each
* channel. This is probably a bug in the specification.
* In this case, TIFFTAG_COLORRESPONSECURVE is ignored.
* This might make sense if TIFFTAG_COLORMAP was 8 bits wide.
*
* TIFFTAG_COLORMAP is often incorrectly written as ranging from
* 0 to 255 rather than from 0 to 65535. CheckAndCorrectColormap()
* takes care of this.
*
* Only ORIENTATION_TOPLEFT is supported correctly. This is the
* default TIFF and X orientation. Other orientations will be
* displayed incorrectly.
*
* There is no support for or use of 3/3/2 DirectColor visuals.
* TIFFTAG_MINSAMPLEVALUE and TIFFTAG_MAXSAMPLEVALUE are not supported.
*
* Only TIFFTAG_BITSPERSAMPLE values that are 1, 2, 4 or 8 are supported.
*/
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <tiffio.h>
#include <X11/Xatom.h>
#include <X11/Intrinsic.h>
#include <X11/StringDefs.h>
#include <X11/Xproto.h>
#include <X11/Shell.h>
#include <X11/Xaw/Form.h>
#include <X11/Xaw/List.h>
#include <X11/Xaw/Label.h>
#include <X11/cursorfont.h>
#define XK_MISCELLANY
#include <X11/keysymdef.h>
#include "xtifficon.h"
#define TIFF_GAMMA "2.2" /* default gamma from the TIFF 5.0 spec */
#define ROUND(x) (uint16) ((x) + 0.5)
#define SCALE(x, s) (((x) * 65535L) / (s))
#define MCHECK(m) if (!m) { fprintf(stderr, "malloc failed\n"); exit(0); }
#define MIN(a, b) (((a) < (b)) ? (a) : (b))
#define MAX(a, b) (((a) > (b)) ? (a) : (b))
#define VIEWPORT_WIDTH 700
#define VIEWPORT_HEIGHT 500
#define KEY_TRANSLATE 20
#ifdef __STDC__
#define PP(args) args
#else
#define PP(args) ()
#endif
int main PP((int argc, char **argv));
void OpenTIFFFile PP((void));
void GetTIFFHeader PP((void));
void SetNameLabel PP((void));
void CheckAndCorrectColormap PP((void));
void SimpleGammaCorrection PP((void));
void GetVisual PP((void));
Boolean SearchVisualList PP((int image_depth,
int visual_class, Visual **visual));
void GetTIFFImage PP((void));
void CreateXImage PP((void));
XtCallbackProc SelectProc PP((Widget w, caddr_t unused_1, caddr_t unused_2));
void QuitProc PP((void));
void NextProc PP((void));
void PreviousProc PP((void));
void PageProc PP((int direction));
void EventProc PP((Widget widget, caddr_t unused, XEvent *event));
void ResizeProc PP((void));
int XTiffErrorHandler PP((Display *display, XErrorEvent *error_event));
void Usage PP((void));
int xtVersion = XtSpecificationRelease; /* xtiff depends on R4 or higher */
/*
* Xt data structures
*/
Widget shellWidget, formWidget, listWidget, labelWidget, imageWidget;
enum { ButtonQuit = 0, ButtonPreviousPage = 1, ButtonNextPage = 2 };
String buttonStrings[] = { "Quit", "Previous", "Next" };
static XrmOptionDescRec shellOptions[] = {
{ "-help", "*help", XrmoptionNoArg, (caddr_t) "True" },
{ "-gamma", "*gamma", XrmoptionSepArg, NULL },
{ "-usePixmap", "*usePixmap", XrmoptionSepArg, NULL },
{ "-viewportWidth", "*viewportWidth", XrmoptionSepArg, NULL },
{ "-viewportHeight", "*viewportHeight", XrmoptionSepArg, NULL },
{ "-translate", "*translate", XrmoptionSepArg, NULL },
{ "-verbose", "*verbose", XrmoptionSepArg, NULL }
};
typedef struct {
Boolean help;
float gamma;
Boolean usePixmap;
uint32 viewportWidth;
uint32 viewportHeight;
int translate;
Boolean verbose;
} AppData, *AppDataPtr;
AppData appData;
XtResource clientResources[] = {
{
"help", XtCBoolean, XtRBoolean, sizeof(Boolean),
XtOffset(AppDataPtr, help), XtRImmediate, (XtPointer) False
}, {
"gamma", "Gamma", XtRFloat, sizeof(float),
XtOffset(AppDataPtr, gamma), XtRString, (XtPointer) TIFF_GAMMA
}, {
"usePixmap", "UsePixmap", XtRBoolean, sizeof(Boolean),
XtOffset(AppDataPtr, usePixmap), XtRImmediate, (XtPointer) True
}, {
"viewportWidth", "ViewportWidth", XtRInt, sizeof(int),
XtOffset(AppDataPtr, viewportWidth), XtRImmediate,
(XtPointer) VIEWPORT_WIDTH
}, {
"viewportHeight", "ViewportHeight", XtRInt, sizeof(int),
XtOffset(AppDataPtr, viewportHeight), XtRImmediate,
(XtPointer) VIEWPORT_HEIGHT
}, {
"translate", "Translate", XtRInt, sizeof(int),
XtOffset(AppDataPtr, translate), XtRImmediate, (XtPointer) KEY_TRANSLATE
}, {
"verbose", "Verbose", XtRBoolean, sizeof(Boolean),
XtOffset(AppDataPtr, verbose), XtRImmediate, (XtPointer) True
}
};
Arg formArgs[] = {
{ XtNresizable, True }
};
Arg listArgs[] = {
{ XtNresizable, False },
{ XtNborderWidth, 0 },
{ XtNdefaultColumns, 3 },
{ XtNforceColumns, True },
{ XtNlist, (int) buttonStrings },
{ XtNnumberStrings, XtNumber(buttonStrings) },
{ XtNtop, XtChainTop },
{ XtNleft, XtChainLeft },
{ XtNbottom, XtChainTop },
{ XtNright, XtChainLeft }
};
Arg labelArgs[] = {
{ XtNresizable, False },
{ XtNwidth, 200 },
{ XtNborderWidth, 0 },
{ XtNjustify, XtJustifyLeft },
{ XtNtop, XtChainTop },
{ XtNleft, XtChainLeft },
{ XtNbottom, XtChainTop },
{ XtNright, XtChainLeft }
};
Arg imageArgs[] = {
{ XtNresizable, True },
{ XtNborderWidth, 0 },
{ XtNtop, XtChainTop },
{ XtNleft, XtChainLeft },
{ XtNbottom, XtChainTop },
{ XtNright, XtChainLeft }
};
XtActionsRec actionsTable[] = {
{ "quit", QuitProc },
{ "next", NextProc },
{ "previous", PreviousProc },
{ "notifyresize", ResizeProc }
};
char translationsTable[] = "<Key>q: quit() \n \
<Key>Q: quit() \n \
<Message>WM_PROTOCOLS: quit()\n \
<Key>p: previous() \n \
<Key>P: previous() \n \
<Key>n: next() \n \
<Key>N: next() \n \
<Configure>: notifyresize()";
/*
* X data structures
*/
Colormap xColormap;
Display * xDisplay;
Pixmap xImagePixmap;
Visual * xVisual;
XImage * xImage;
GC xWinGc;
int xImageDepth, xScreen, xRedMask, xGreenMask, xBlueMask,
xOffset = 0, yOffset = 0, grabX = -1, grabY = -1;
unsigned char basePixel = 0;
/*
* TIFF data structures
*/
TIFF * tfFile = NULL;
uint32 tfImageWidth, tfImageHeight;
uint16 tfBitsPerSample, tfSamplesPerPixel, tfPlanarConfiguration,
tfPhotometricInterpretation, tfGrayResponseUnit,
tfImageDepth, tfBytesPerRow;
int tfDirectory = 0, tfMultiPage = False;
double tfUnitMap, tfGrayResponseUnitMap[] = {
-1, -10, -100, -1000, -10000, -100000
};
/*
* display data structures
*/
double *dRed, *dGreen, *dBlue;
/*
* shared data structures
*/
uint16 * redMap = NULL, *greenMap = NULL, *blueMap = NULL,
*grayMap = NULL, colormapSize;
char * imageMemory;
char * fileName;
int
main(int argc, char **argv)
{
XSetWindowAttributes window_attributes;
Widget widget_list[3];
Arg args[5];
setbuf(stdout, NULL); setbuf(stderr, NULL);
shellWidget = XtInitialize(argv[0], "XTiff", shellOptions,
XtNumber(shellOptions), &argc, argv);
XSetErrorHandler(XTiffErrorHandler);
XtGetApplicationResources(shellWidget, &appData,
(XtResourceList) clientResources, (Cardinal) XtNumber(clientResources),
(ArgList) NULL, (Cardinal) 0);
if ((argc <= 1) || (argc > 2) || appData.help)
Usage();
if (appData.verbose == False) {
TIFFSetErrorHandler(0);
TIFFSetWarningHandler(0);
}
fileName = argv[1];
xDisplay = XtDisplay(shellWidget);
xScreen = DefaultScreen(xDisplay);
OpenTIFFFile();
GetTIFFHeader();
SimpleGammaCorrection();
GetVisual();
GetTIFFImage();
/*
* Send visual, colormap, depth and iconPixmap to shellWidget.
* Sending the visual to the shell is only possible with the advent of R4.
*/
XtSetArg(args[0], XtNvisual, xVisual);
XtSetArg(args[1], XtNcolormap, xColormap);
XtSetArg(args[2], XtNdepth,
xImageDepth == 1 ? DefaultDepth(xDisplay, xScreen) : xImageDepth);
XtSetArg(args[3], XtNiconPixmap,
XCreateBitmapFromData(xDisplay, RootWindow(xDisplay, xScreen),
xtifficon_bits, xtifficon_width, xtifficon_height));
XtSetArg(args[4], XtNallowShellResize, True);
XtSetValues(shellWidget, args, 5);
/*
* widget instance hierarchy
*/
formWidget = XtCreateManagedWidget("form", formWidgetClass,
shellWidget, formArgs, XtNumber(formArgs));
widget_list[0] = listWidget = XtCreateWidget("list",
listWidgetClass, formWidget, listArgs, XtNumber(listArgs));
widget_list[1] = labelWidget = XtCreateWidget("label",
labelWidgetClass, formWidget, labelArgs, XtNumber(labelArgs));
widget_list[2] = imageWidget = XtCreateWidget("image",
widgetClass, formWidget, imageArgs, XtNumber(imageArgs));
XtManageChildren(widget_list, XtNumber(widget_list));
/*
* initial widget sizes - for small images let xtiff size itself
*/
if (tfImageWidth >= appData.viewportWidth) {
XtSetArg(args[0], XtNwidth, appData.viewportWidth);
XtSetValues(shellWidget, args, 1);
}
if (tfImageHeight >= appData.viewportHeight) {
XtSetArg(args[0], XtNheight, appData.viewportHeight);
XtSetValues(shellWidget, args, 1);
}
XtSetArg(args[0], XtNwidth, tfImageWidth);
XtSetArg(args[1], XtNheight, tfImageHeight);
XtSetValues(imageWidget, args, 2);
/*
* formWidget uses these constraints but they are stored in the children.
*/
XtSetArg(args[0], XtNfromVert, listWidget);
XtSetValues(imageWidget, args, 1);
XtSetArg(args[0], XtNfromHoriz, listWidget);
XtSetValues(labelWidget, args, 1);
SetNameLabel();
XtAddCallback(listWidget, XtNcallback, (XtCallbackProc) SelectProc,
(XtPointer) NULL);
XtAddActions(actionsTable, XtNumber(actionsTable));
XtSetArg(args[0], XtNtranslations,
XtParseTranslationTable(translationsTable));
XtSetValues(formWidget, &args[0], 1);
XtSetValues(imageWidget, &args[0], 1);
/*
* This is intended to be a little faster than going through
* the translation manager.
*/
XtAddEventHandler(imageWidget, ExposureMask | ButtonPressMask
| ButtonReleaseMask | Button1MotionMask | KeyPressMask,
False, EventProc, NULL);
XtRealizeWidget(shellWidget);
window_attributes.cursor = XCreateFontCursor(xDisplay, XC_fleur);
XChangeWindowAttributes(xDisplay, XtWindow(imageWidget),
CWCursor, &window_attributes);
CreateXImage();
XtMainLoop();
return 0;
}
void
OpenTIFFFile()
{
if (tfFile != NULL)
TIFFClose(tfFile);
if ((tfFile = TIFFOpen(fileName, "r")) == NULL) {
fprintf(appData.verbose ? stderr : stdout,
"xtiff: can't open %s as a TIFF file\n", fileName);
exit(0);
}
tfMultiPage = (TIFFLastDirectory(tfFile) ? False : True);
}
void
GetTIFFHeader()
{
register int i;
if (!TIFFSetDirectory(tfFile, tfDirectory)) {
fprintf(stderr, "xtiff: can't seek to directory %d in %s\n",
tfDirectory, fileName);
exit(0);
}
TIFFGetField(tfFile, TIFFTAG_IMAGEWIDTH, &tfImageWidth);
TIFFGetField(tfFile, TIFFTAG_IMAGELENGTH, &tfImageHeight);
/*
* If the following tags aren't present then use the TIFF defaults.
*/
TIFFGetFieldDefaulted(tfFile, TIFFTAG_BITSPERSAMPLE, &tfBitsPerSample);
TIFFGetFieldDefaulted(tfFile, TIFFTAG_SAMPLESPERPIXEL, &tfSamplesPerPixel);
TIFFGetFieldDefaulted(tfFile, TIFFTAG_PLANARCONFIG, &tfPlanarConfiguration);
TIFFGetFieldDefaulted(tfFile, TIFFTAG_GRAYRESPONSEUNIT, &tfGrayResponseUnit);
tfUnitMap = tfGrayResponseUnitMap[tfGrayResponseUnit];
colormapSize = 1 << tfBitsPerSample;
tfImageDepth = tfBitsPerSample * tfSamplesPerPixel;
dRed = (double *) malloc(colormapSize * sizeof(double));
dGreen = (double *) malloc(colormapSize * sizeof(double));
dBlue = (double *) malloc(colormapSize * sizeof(double));
MCHECK(dRed); MCHECK(dGreen); MCHECK(dBlue);
/*
* If TIFFTAG_PHOTOMETRIC is not present then assign a reasonable default.
* The TIFF 5.0 specification doesn't give a default.
*/
if (!TIFFGetField(tfFile, TIFFTAG_PHOTOMETRIC,
&tfPhotometricInterpretation)) {
if (tfSamplesPerPixel != 1)
tfPhotometricInterpretation = PHOTOMETRIC_RGB;
else if (tfBitsPerSample == 1)
tfPhotometricInterpretation = PHOTOMETRIC_MINISBLACK;
else if (TIFFGetField(tfFile, TIFFTAG_COLORMAP,
&redMap, &greenMap, &blueMap)) {
tfPhotometricInterpretation = PHOTOMETRIC_PALETTE;
redMap = greenMap = blueMap = NULL;
} else
tfPhotometricInterpretation = PHOTOMETRIC_MINISBLACK;
}
/*
* Given TIFFTAG_PHOTOMETRIC extract or create the response curves.
*/
switch (tfPhotometricInterpretation) {
case PHOTOMETRIC_RGB:
redMap = (uint16 *) malloc(colormapSize * sizeof(uint16));
greenMap = (uint16 *) malloc(colormapSize * sizeof(uint16));
blueMap = (uint16 *) malloc(colormapSize * sizeof(uint16));
MCHECK(redMap); MCHECK(greenMap); MCHECK(blueMap);
for (i = 0; i < colormapSize; i++)
dRed[i] = dGreen[i] = dBlue[i]
= (double) SCALE(i, colormapSize - 1);
break;
case PHOTOMETRIC_PALETTE:
if (!TIFFGetField(tfFile, TIFFTAG_COLORMAP,
&redMap, &greenMap, &blueMap)) {
redMap = (uint16 *) malloc(colormapSize * sizeof(uint16));
greenMap = (uint16 *) malloc(colormapSize * sizeof(uint16));
blueMap = (uint16 *) malloc(colormapSize * sizeof(uint16));
MCHECK(redMap); MCHECK(greenMap); MCHECK(blueMap);
for (i = 0; i < colormapSize; i++)
dRed[i] = dGreen[i] = dBlue[i]
= (double) SCALE(i, colormapSize - 1);
} else {
CheckAndCorrectColormap();
for (i = 0; i < colormapSize; i++) {
dRed[i] = (double) redMap[i];
dGreen[i] = (double) greenMap[i];
dBlue[i] = (double) blueMap[i];
}
}
break;
case PHOTOMETRIC_MINISWHITE:
redMap = (uint16 *) malloc(colormapSize * sizeof(uint16));
greenMap = (uint16 *) malloc(colormapSize * sizeof(uint16));
blueMap = (uint16 *) malloc(colormapSize * sizeof(uint16));
MCHECK(redMap); MCHECK(greenMap); MCHECK(blueMap);
for (i = 0; i < colormapSize; i++)
dRed[i] = dGreen[i] = dBlue[i] = (double)
SCALE(colormapSize-1-i, colormapSize-1);
break;
case PHOTOMETRIC_MINISBLACK:
redMap = (uint16 *) malloc(colormapSize * sizeof(uint16));
greenMap = (uint16 *) malloc(colormapSize * sizeof(uint16));
blueMap = (uint16 *) malloc(colormapSize * sizeof(uint16));
MCHECK(redMap); MCHECK(greenMap); MCHECK(blueMap);
for (i = 0; i < colormapSize; i++)
dRed[i] = dGreen[i] = dBlue[i] = (double) SCALE(i, colormapSize-1);
break;
default:
fprintf(stderr,
"xtiff: can't display photometric interpretation type %d\n",
tfPhotometricInterpretation);
exit(0);
}
}
void
SetNameLabel()
{
char buffer[BUFSIZ];
Arg args[1];
if (tfMultiPage)
snprintf(buffer, sizeof(buffer), "%s - page %d", fileName, tfDirectory);
else
snprintf(buffer, sizeof(buffer), "%s", fileName);
XtSetArg(args[0], XtNlabel, buffer);
XtSetValues(labelWidget, args, 1);
}
/*
* Many programs get TIFF colormaps wrong. They use 8-bit colormaps instead of
* 16-bit colormaps. This function is a heuristic to detect and correct this.
*/
void
CheckAndCorrectColormap()
{
register int i;
for (i = 0; i < colormapSize; i++)
if ((redMap[i] > 255) || (greenMap[i] > 255) || (blueMap[i] > 255))
return;
for (i = 0; i < colormapSize; i++) {
redMap[i] = SCALE(redMap[i], 255);
greenMap[i] = SCALE(greenMap[i], 255);
blueMap[i] = SCALE(blueMap[i], 255);
}
TIFFWarning(fileName, "Assuming 8-bit colormap");
}
void
SimpleGammaCorrection()
{
register int i;
register double i_gamma = 1.0 / appData.gamma;
for (i = 0; i < colormapSize; i++) {
if (((tfPhotometricInterpretation == PHOTOMETRIC_MINISWHITE)
&& (i == colormapSize - 1))
|| ((tfPhotometricInterpretation == PHOTOMETRIC_MINISBLACK)
&& (i == 0)))
redMap[i] = greenMap[i] = blueMap[i] = 0;
else {
redMap[i] = ROUND((pow(dRed[i] / 65535.0, i_gamma) * 65535.0));
greenMap[i] = ROUND((pow(dGreen[i] / 65535.0, i_gamma) * 65535.0));
blueMap[i] = ROUND((pow(dBlue[i] / 65535.0, i_gamma) * 65535.0));
}
}
free(dRed); free(dGreen); free(dBlue);
}
static char* classNames[] = {
"StaticGray",
"GrayScale",
"StaticColor",
"PseudoColor",
"TrueColor",
"DirectColor"
};
/*
* Current limitation: the visual is set initially by the first file.
* It cannot be changed.
*/
void
GetVisual()
{
XColor *colors = NULL;
unsigned long *pixels = NULL;
unsigned long i;
switch (tfImageDepth) {
/*
* X really wants a 32-bit image with the fourth channel unused,
* but the visual structure thinks it's 24-bit. bitmap_unit is 32.
*/
case 32:
case 24:
if (SearchVisualList(24, DirectColor, &xVisual) == False) {
fprintf(stderr, "xtiff: 24-bit DirectColor visual not available\n");
exit(0);
}
colors = (XColor *) malloc(3 * colormapSize * sizeof(XColor));
MCHECK(colors);
for (i = 0; i < colormapSize; i++) {
colors[i].pixel = (i << 16) + (i << 8) + i;
colors[i].red = redMap[i];
colors[i].green = greenMap[i];
colors[i].blue = blueMap[i];
colors[i].flags = DoRed | DoGreen | DoBlue;
}
xColormap = XCreateColormap(xDisplay, RootWindow(xDisplay, xScreen),
xVisual, AllocAll);
XStoreColors(xDisplay, xColormap, colors, colormapSize);
break;
case 8:
case 4:
case 2:
/*
* We assume that systems with 24-bit visuals also have 8-bit visuals.
* We don't promote from 8-bit PseudoColor to 24/32 bit DirectColor.
*/
switch (tfPhotometricInterpretation) {
case PHOTOMETRIC_MINISWHITE:
case PHOTOMETRIC_MINISBLACK:
if (SearchVisualList((int) tfImageDepth, GrayScale, &xVisual) == True)
break;
case PHOTOMETRIC_PALETTE:
if (SearchVisualList((int) tfImageDepth, PseudoColor, &xVisual) == True)
break;
default:
fprintf(stderr, "xtiff: Unsupported TIFF/X configuration\n");
exit(0);
}
colors = (XColor *) malloc(colormapSize * sizeof(XColor));
MCHECK(colors);
for (i = 0; i < colormapSize; i++) {
colors[i].pixel = i;
colors[i].red = redMap[i];
colors[i].green = greenMap[i];
colors[i].blue = blueMap[i];
colors[i].flags = DoRed | DoGreen | DoBlue;
}
/*
* xtiff's colormap allocation is private. It does not attempt
* to detect whether any existing colormap entries are suitable
* for its use. This will cause colormap flashing. Furthermore,
* background and foreground are taken from the environment.
* For example, the foreground color may be red when the visual
* is GrayScale. If the colormap is completely populated,
* Xt will not be able to allocate fg and bg.
*/
if (tfImageDepth == 8)
xColormap = XCreateColormap(xDisplay, RootWindow(xDisplay, xScreen),
xVisual, AllocAll);
else {
xColormap = XCreateColormap(xDisplay, RootWindow(xDisplay, xScreen),
xVisual, AllocNone);
pixels = (unsigned long *)
malloc(colormapSize * sizeof(unsigned long));
MCHECK(pixels);
(void) XAllocColorCells(xDisplay, xColormap, True,
NULL, 0, pixels, colormapSize);
basePixel = (unsigned char) pixels[0];
free(pixels);
}
XStoreColors(xDisplay, xColormap, colors, colormapSize);
break;
case 1:
xImageDepth = 1;
xVisual = DefaultVisual(xDisplay, xScreen);
xColormap = DefaultColormap(xDisplay, xScreen);
break;
default:
fprintf(stderr, "xtiff: unsupported image depth %d\n", tfImageDepth);
exit(0);
}
if (appData.verbose == True)
fprintf(stderr, "%s: Using %d-bit %s visual.\n",
fileName, xImageDepth, classNames[xVisual->class]);
if (colors != NULL)
free(colors);
if (grayMap != NULL)
free(grayMap);
if (redMap != NULL)
free(redMap);
if (greenMap != NULL)
free(greenMap);
if (blueMap != NULL)
free(blueMap);
colors = NULL; grayMap = redMap = greenMap = blueMap = NULL;
}
/*
* Search for an appropriate visual. Promote where necessary.
* Check to make sure that ENOUGH colormap entries are writeable.
* basePixel was determined when XAllocColorCells() contiguously
* allocated enough entries. basePixel is used below in GetTIFFImage.
*/
Boolean
SearchVisualList(image_depth, visual_class, visual)
int image_depth, visual_class;
Visual **visual;
{
XVisualInfo template_visual, *visual_list, *vl;
int i, n_visuals;
template_visual.screen = xScreen;
vl = visual_list = XGetVisualInfo(xDisplay, VisualScreenMask,
&template_visual, &n_visuals);
if (n_visuals == 0) {
fprintf(stderr, "xtiff: visual list not available\n");
exit(0);
}
for (i = 0; i < n_visuals; vl++, i++) {
if ((vl->class == visual_class) && (vl->depth >= image_depth)
&& (vl->visual->map_entries >= (1 << vl->depth))) {
*visual = vl->visual;
xImageDepth = vl->depth;
xRedMask = vl->red_mask;
xGreenMask = vl->green_mask;
xBlueMask = vl->blue_mask;
XFree((char *) visual_list);
return True;
}
}
XFree((char *) visual_list);
return False;
}
void
GetTIFFImage()
{
int pixel_map[3], red_shift, green_shift, blue_shift;
char *scan_line, *output_p, *input_p;
uint32 i, j;
uint16 s;
scan_line = (char *) malloc(tfBytesPerRow = TIFFScanlineSize(tfFile));
MCHECK(scan_line);
if ((tfImageDepth == 32) || (tfImageDepth == 24)) {
output_p = imageMemory = (char *)
malloc(tfImageWidth * tfImageHeight * 4);
MCHECK(imageMemory);
/*
* Handle different color masks for different frame buffers.
*/
if (ImageByteOrder(xDisplay) == LSBFirst) { /* DECstation 5000 */
red_shift = pixel_map[0] = xRedMask == 0xFF000000 ? 3
: (xRedMask == 0xFF0000 ? 2 : (xRedMask == 0xFF00 ? 1 : 0));
green_shift = pixel_map[1] = xGreenMask == 0xFF000000 ? 3
: (xGreenMask == 0xFF0000 ? 2 : (xGreenMask == 0xFF00 ? 1 : 0));
blue_shift = pixel_map[2] = xBlueMask == 0xFF000000 ? 3
: (xBlueMask == 0xFF0000 ? 2 : (xBlueMask == 0xFF00 ? 1 : 0));
} else { /* Ardent */
red_shift = pixel_map[0] = xRedMask == 0xFF000000 ? 0
: (xRedMask == 0xFF0000 ? 1 : (xRedMask == 0xFF00 ? 2 : 3));
green_shift = pixel_map[0] = xGreenMask == 0xFF000000 ? 0
: (xGreenMask == 0xFF0000 ? 1 : (xGreenMask == 0xFF00 ? 2 : 3));
blue_shift = pixel_map[0] = xBlueMask == 0xFF000000 ? 0
: (xBlueMask == 0xFF0000 ? 1 : (xBlueMask == 0xFF00 ? 2 : 3));
}
if (tfPlanarConfiguration == PLANARCONFIG_CONTIG) {
for (i = 0; i < tfImageHeight; i++) {
if (TIFFReadScanline(tfFile, scan_line, i, 0) < 0)
break;
for (input_p = scan_line, j = 0; j < tfImageWidth; j++) {
*(output_p + red_shift) = *input_p++;
*(output_p + green_shift) = *input_p++;
*(output_p + blue_shift) = *input_p++;
output_p += 4;
if (tfSamplesPerPixel == 4) /* skip the fourth channel */
input_p++;
}
}
} else {
for (s = 0; s < tfSamplesPerPixel; s++) {
if (s == 3) /* skip the fourth channel */
continue;
for (i = 0; i < tfImageHeight; i++) {
if (TIFFReadScanline(tfFile, scan_line, i, s) < 0)
break;
input_p = scan_line;
output_p = imageMemory + (i*tfImageWidth*4) + pixel_map[s];
for (j = 0; j < tfImageWidth; j++, output_p += 4)
*output_p = *input_p++;
}
}
}
} else {
if (xImageDepth == tfImageDepth) {
output_p = imageMemory = (char *)
malloc(tfBytesPerRow * tfImageHeight);
MCHECK(imageMemory);
for (i = 0; i < tfImageHeight; i++, output_p += tfBytesPerRow)
if (TIFFReadScanline(tfFile, output_p, i, 0) < 0)
break;
} else if ((xImageDepth == 8) && (tfImageDepth == 4)) {
output_p = imageMemory = (char *)
malloc(tfBytesPerRow * 2 * tfImageHeight + 2);
MCHECK(imageMemory);
/*
* If a scanline is of odd size the inner loop below will overshoot.
* This is handled very simply by recalculating the start point at
* each scanline and padding imageMemory a little at the end.
*/
for (i = 0; i < tfImageHeight; i++) {
if (TIFFReadScanline(tfFile, scan_line, i, 0) < 0)
break;
output_p = &imageMemory[i * tfImageWidth];
input_p = scan_line;
for (j = 0; j < tfImageWidth; j += 2, input_p++) {
*output_p++ = (*input_p >> 4) + basePixel;
*output_p++ = (*input_p & 0xf) + basePixel;
}
}
} else if ((xImageDepth == 8) && (tfImageDepth == 2)) {
output_p = imageMemory = (char *)
malloc(tfBytesPerRow * 4 * tfImageHeight + 4);
MCHECK(imageMemory);
for (i = 0; i < tfImageHeight; i++) {
if (TIFFReadScanline(tfFile, scan_line, i, 0) < 0)
break;
output_p = &imageMemory[i * tfImageWidth];
input_p = scan_line;
for (j = 0; j < tfImageWidth; j += 4, input_p++) {
*output_p++ = (*input_p >> 6) + basePixel;
*output_p++ = ((*input_p >> 4) & 3) + basePixel;
*output_p++ = ((*input_p >> 2) & 3) + basePixel;
*output_p++ = (*input_p & 3) + basePixel;
}
}
} else if ((xImageDepth == 4) && (tfImageDepth == 2)) {
output_p = imageMemory = (char *)
malloc(tfBytesPerRow * 2 * tfImageHeight + 2);
MCHECK(imageMemory);
for (i = 0; i < tfImageHeight; i++) {
if (TIFFReadScanline(tfFile, scan_line, i, 0) < 0)
break;
output_p = &imageMemory[i * tfBytesPerRow * 2];
input_p = scan_line;
for (j = 0; j < tfImageWidth; j += 4, input_p++) {
*output_p++ = (((*input_p>>6) << 4)
| ((*input_p >> 4) & 3)) + basePixel;
*output_p++ = ((((*input_p>>2) & 3) << 4)
| (*input_p & 3)) + basePixel;
}
}
} else {
fprintf(stderr,
"xtiff: can't handle %d-bit TIFF file on an %d-bit display\n",
tfImageDepth, xImageDepth);
exit(0);
}
}
free(scan_line);
}
void
CreateXImage()
{
XGCValues gc_values;
GC bitmap_gc;
xOffset = yOffset = 0;
grabX = grabY = -1;
xImage = XCreateImage(xDisplay, xVisual, xImageDepth,
xImageDepth == 1 ? XYBitmap : ZPixmap, /* offset */ 0,
(char *) imageMemory, tfImageWidth, tfImageHeight,
/* bitmap_pad */ 8, /* bytes_per_line */ 0);
/*
* libtiff converts LSB data into MSB but doesn't change the FillOrder tag.
*/
if (xImageDepth == 1)
xImage->bitmap_bit_order = MSBFirst;
if (xImageDepth <= 8)
xImage->byte_order = MSBFirst;
/*
* create an appropriate GC
*/
gc_values.function = GXcopy;
gc_values.plane_mask = AllPlanes;
if (tfPhotometricInterpretation == PHOTOMETRIC_MINISBLACK) {
gc_values.foreground = XWhitePixel(xDisplay, xScreen);
gc_values.background = XBlackPixel(xDisplay, xScreen);
} else {
gc_values.foreground = XBlackPixel(xDisplay, xScreen);
gc_values.background = XWhitePixel(xDisplay, xScreen);
}
xWinGc = XCreateGC(xDisplay, XtWindow(shellWidget),
GCFunction | GCPlaneMask | GCForeground | GCBackground, &gc_values);
/*
* create the pixmap and load the image
*/
if (appData.usePixmap == True) {
xImagePixmap = XCreatePixmap(xDisplay, RootWindow(xDisplay, xScreen),
xImage->width, xImage->height, xImageDepth);
/*
* According to the O'Reilly X Protocol Reference Manual, page 53,
* "A pixmap depth of one is always supported and listed, but windows
* of depth one might not be supported." Therefore we create a pixmap
* of depth one and use XCopyPlane(). This is idiomatic.
*/
if (xImageDepth == 1) { /* just pass the bits through */
gc_values.foreground = 1; /* foreground describes set bits */
gc_values.background = 0; /* background describes clear bits */
bitmap_gc = XCreateGC(xDisplay, xImagePixmap,
GCForeground | GCBackground, &gc_values);
XPutImage(xDisplay, xImagePixmap, bitmap_gc, xImage,
0, 0, 0, 0, xImage->width, xImage->height);
} else
XPutImage(xDisplay, xImagePixmap, xWinGc, xImage,
0, 0, 0, 0, xImage->width, xImage->height);
XDestroyImage(xImage);
free(imageMemory);
}
}
XtCallbackProc
SelectProc(w, unused_1, unused_2)
Widget w;
caddr_t unused_1;
caddr_t unused_2;
{
XawListReturnStruct *list_return;
list_return = XawListShowCurrent(w);
switch (list_return->list_index) {
case ButtonQuit:
QuitProc();
break;
case ButtonPreviousPage:
PreviousProc();
break;
case ButtonNextPage:
NextProc();
break;
default:
fprintf(stderr, "error in SelectProc\n");
exit(0);
}
XawListUnhighlight(w);
}
void
QuitProc(void)
{
exit(0);
}
void
NextProc()
{
PageProc(ButtonNextPage);
}
void
PreviousProc()
{
PageProc(ButtonPreviousPage);
}
void
PageProc(direction)
int direction;
{
XEvent fake_event;
Arg args[4];
switch (direction) {
case ButtonPreviousPage:
if (tfDirectory > 0)
TIFFSetDirectory(tfFile, --tfDirectory);
else
return;
break;
case ButtonNextPage:
if (TIFFReadDirectory(tfFile) == True)
tfDirectory++;
else
return;
break;
default:
fprintf(stderr, "error in PageProc\n");
exit(0);
}
xOffset = yOffset = 0;
grabX = grabY = -1;
GetTIFFHeader();
SetNameLabel();
GetTIFFImage();
if (appData.usePixmap == True)
XFreePixmap(xDisplay, xImagePixmap);
else
XDestroyImage(xImage);
CreateXImage();
/*
* Using XtSetValues() to set the widget size causes a resize.
* This resize gets propagated up to the parent shell.
* In order to disable this visually disconcerting effect,
* shell resizing is temporarily disabled.
*/
XtSetArg(args[0], XtNallowShellResize, False);
XtSetValues(shellWidget, args, 1);
XtSetArg(args[0], XtNwidth, tfImageWidth);
XtSetArg(args[1], XtNheight, tfImageHeight);
XtSetValues(imageWidget, args, 2);
XtSetArg(args[0], XtNallowShellResize, True);
XtSetValues(shellWidget, args, 1);
XClearWindow(xDisplay, XtWindow(imageWidget));
fake_event.type = Expose;
fake_event.xexpose.x = fake_event.xexpose.y = 0;
fake_event.xexpose.width = tfImageWidth; /* the window will clip */
fake_event.xexpose.height = tfImageHeight;
EventProc(imageWidget, NULL, &fake_event);
}
void
EventProc(widget, unused, event)
Widget widget;
caddr_t unused;
XEvent *event;
{
int ih, iw, ww, wh, sx, sy, w, h, dx, dy;
Dimension w_width, w_height;
XEvent next_event;
Arg args[2];
if (event->type == MappingNotify) {
XRefreshKeyboardMapping((XMappingEvent *) event);
return;
}
if (!XtIsRealized(widget))
return;
if ((event->type == ButtonPress) || (event->type == ButtonRelease))
if (event->xbutton.button != Button1)
return;
iw = tfImageWidth; /* avoid sign problems */
ih = tfImageHeight;
/*
* The grabX and grabY variables record where the user grabbed the image.
* They also record whether the mouse button is down or not.
*/
if (event->type == ButtonPress) {
grabX = event->xbutton.x;
grabY = event->xbutton.y;
return;
}
/*
* imageWidget is a Core widget and doesn't get resized.
* So we calculate the size of its viewport here.
*/
XtSetArg(args[0], XtNwidth, &w_width);
XtSetArg(args[1], XtNheight, &w_height);
XtGetValues(shellWidget, args, 2);
ww = w_width;
wh = w_height;
XtGetValues(listWidget, args, 2);
wh -= w_height;
switch (event->type) {
case Expose:
dx = event->xexpose.x;
dy = event->xexpose.y;
sx = dx + xOffset;
sy = dy + yOffset;
w = MIN(event->xexpose.width, iw);
h = MIN(event->xexpose.height, ih);
break;
case KeyPress:
if ((grabX >= 0) || (grabY >= 0)) /* Mouse button is still down */
return;
switch (XLookupKeysym((XKeyEvent *) event, /* KeySyms index */ 0)) {
case XK_Up:
if (ih < wh) /* Don't scroll if the window fits the image. */
return;
sy = yOffset + appData.translate;
sy = MIN(ih - wh, sy);
if (sy == yOffset) /* Filter redundant stationary refreshes. */
return;
yOffset = sy;
sx = xOffset;
dx = dy = 0;
w = ww; h = wh;
break;
case XK_Down:
if (ih < wh)
return;
sy = yOffset - appData.translate;
sy = MAX(sy, 0);
if (sy == yOffset)
return;
yOffset = sy;
sx = xOffset;
dx = dy = 0;
w = ww; h = wh;
break;
case XK_Left:
if (iw < ww)
return;
sx = xOffset + appData.translate;
sx = MIN(iw - ww, sx);
if (sx == xOffset)
return;
xOffset = sx;
sy = yOffset;
dx = dy = 0;
w = ww; h = wh;
break;
case XK_Right:
if (iw < ww)
return;
sx = xOffset - appData.translate;
sx = MAX(sx, 0);
if (sx == xOffset)
return;
xOffset = sx;
sy = yOffset;
dx = dy = 0;
w = ww; h = wh;
break;
default:
return;
}
break;
case MotionNotify:
/*
* MotionEvent compression. Ignore multiple motion events.
* Ignore motion events if the mouse button is up.
*/
if (XPending(xDisplay)) /* Xlib doesn't flush the output buffer */
if (XtPeekEvent(&next_event))
if (next_event.type == MotionNotify)
return;
if ((grabX < 0) || (grabY < 0))
return;
sx = xOffset + grabX - (int) event->xmotion.x;
if (sx >= (iw - ww)) /* clamp x motion but allow y motion */
sx = iw - ww;
sx = MAX(sx, 0);
sy = yOffset + grabY - (int) event->xmotion.y;
if (sy >= (ih - wh)) /* clamp y motion but allow x motion */
sy = ih - wh;
sy = MAX(sy, 0);
if ((sx == xOffset) && (sy == yOffset))
return;
dx = dy = 0;
w = ww; h = wh;
break;
case ButtonRelease:
xOffset = xOffset + grabX - (int) event->xbutton.x;
xOffset = MIN(iw - ww, xOffset);
xOffset = MAX(xOffset, 0);
yOffset = yOffset + grabY - (int) event->xbutton.y;
yOffset = MIN(ih - wh, yOffset);
yOffset = MAX(yOffset, 0);
grabX = grabY = -1;
default:
return;
}
if (appData.usePixmap == True) {
if (xImageDepth == 1)
XCopyPlane(xDisplay, xImagePixmap, XtWindow(widget),
xWinGc, sx, sy, w, h, dx, dy, 1);
else
XCopyArea(xDisplay, xImagePixmap, XtWindow(widget),
xWinGc, sx, sy, w, h, dx, dy);
} else
XPutImage(xDisplay, XtWindow(widget), xWinGc, xImage,
sx, sy, dx, dy, w, h);
}
void
ResizeProc()
{
Dimension w_width, w_height;
int xo, yo, ww, wh;
XEvent fake_event;
Arg args[2];
if ((xOffset == 0) && (yOffset == 0))
return;
XtSetArg(args[0], XtNwidth, &w_width);
XtSetArg(args[1], XtNheight, &w_height);
XtGetValues(shellWidget, args, 2);
ww = w_width;
wh = w_height;
XtGetValues(listWidget, args, 2);
wh -= w_height;
xo = xOffset; yo = yOffset;
if ((xOffset + ww) >= tfImageWidth)
xOffset = MAX((int) tfImageWidth - ww, 0);
if ((yOffset + wh) >= tfImageHeight)
yOffset = MAX((int) tfImageHeight - wh, 0);
/*
* Send an ExposeEvent if the origin changed.
* We have to do this because of the use and semantics of bit gravity.
*/
if ((xo != xOffset) || (yo != yOffset)) {
fake_event.type = Expose;
fake_event.xexpose.x = fake_event.xexpose.y = 0;
fake_event.xexpose.width = tfImageWidth;
fake_event.xexpose.height = tfImageHeight;
EventProc(imageWidget, NULL, &fake_event);
}
}
int
XTiffErrorHandler(display, error_event)
Display *display;
XErrorEvent *error_event;
{
char message[80];
/*
* Some X servers limit the size of pixmaps.
*/
if ((error_event->error_code == BadAlloc)
&& (error_event->request_code == X_CreatePixmap))
fprintf(stderr, "xtiff: requested pixmap too big for display\n");
else {
XGetErrorText(display, error_event->error_code, message, 80);
fprintf(stderr, "xtiff: error code %s\n", message);
}
exit(0);
}
void
Usage()
{
fprintf(stderr, "Usage xtiff: [options] tiff-file\n");
fprintf(stderr, "\tstandard Xt options\n");
fprintf(stderr, "\t[-help]\n");
fprintf(stderr, "\t[-gamma gamma]\n");
fprintf(stderr, "\t[-usePixmap (True | False)]\n");
fprintf(stderr, "\t[-viewportWidth pixels]\n");
fprintf(stderr, "\t[-viewportHeight pixels]\n");
fprintf(stderr, "\t[-translate pixels]\n");
fprintf(stderr, "\t[-verbose (True | False)]\n");
exit(0);
}
/* vim: set ts=8 sts=8 sw=8 noet: */
/*
* Local Variables:
* mode: c
* c-basic-offset: 8
* fill-column: 78
* End:
*/