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Diffstat (limited to 'tiff/contrib/dbs/xtiff/xtiff.c')
| -rw-r--r-- | tiff/contrib/dbs/xtiff/xtiff.c | 1290 |
1 files changed, 1290 insertions, 0 deletions
diff --git a/tiff/contrib/dbs/xtiff/xtiff.c b/tiff/contrib/dbs/xtiff/xtiff.c new file mode 100644 index 0000000..7fe3977 --- /dev/null +++ b/tiff/contrib/dbs/xtiff/xtiff.c @@ -0,0 +1,1290 @@ +/* + * $Id: xtiff.c,v 1.2.2.1 2010-06-08 18:50:40 bfriesen 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) + sprintf(buffer, "%s - page %d", fileName, tfDirectory); + else + strcpy(buffer, 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: + */ |