428 lines
11 KiB
C++
428 lines
11 KiB
C++
#include <osg/Image>
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#include <osg/Image>
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#include <osg/Input>
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#include <osg/Output>
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#include <osg/Notify>
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#include <osg/Registry>
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#include <osg/Geode>
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#include <osg/GL>
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#include <stdio.h>
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/****************************************************************************
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*
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* Follows is code extracted from the simage library. Original Authors:
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*
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* Systems in Motion,
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* <URL:http://www.sim.no>
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*
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* Peder Blekken <pederb@sim.no>
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* Morten Eriksen <mortene@sim.no>
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* Marius Bugge Monsen <mariusbu@sim.no>
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*
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* The original COPYING notice
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*
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* All files in this library are public domain, except simage_rgb.cpp which is
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* Copyright (c) Mark J Kilgard <mjk@nvidia.com>. I will contact Mark
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* very soon to hear if this source also can become public domain.
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*
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* Please send patches for bugs and new features to: <pederb@sim.no>.
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*
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* Peder Blekken
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*
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*
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* Ported into the OSG as a plugin, Robert Osfield Decemeber 2000.
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* Note, reference above to license of simage_rgb is not relevent to the OSG
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* as the OSG does not use it. Also for patches, bugs and new features
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* please send them direct to the OSG dev team rather than address above.
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*
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**********************************************************************/
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#include <tiffio.h>
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#include <string.h>
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#include <stdarg.h>
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#include <assert.h>
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#include <stdlib.h>
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#define ERR_NO_ERROR 0
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#define ERR_OPEN 1
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#define ERR_READ 2
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#define ERR_MEM 3
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#define ERR_UNSUPPORTED 4
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#define ERR_TIFFLIB 5
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static int tifferror = ERR_NO_ERROR;
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int
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simage_tiff_error(char * buffer, int buflen)
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{
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switch (tifferror) {
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case ERR_OPEN:
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strncpy(buffer, "TIFF loader: Error opening file", buflen);
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break;
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case ERR_MEM:
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strncpy(buffer, "TIFF loader: Out of memory error", buflen);
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break;
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case ERR_UNSUPPORTED:
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strncpy(buffer, "TIFF loader: Unsupported image type", buflen);
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break;
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case ERR_TIFFLIB:
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strncpy(buffer, "TIFF loader: Illegal tiff file", buflen);
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break;
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}
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return tifferror;
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}
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static void
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tiff_error(const char* module, const char* fmt, va_list list)
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{
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/* FIXME: store error message ? */
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}
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static void
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tiff_warn(const char * module, const char * fmt, va_list list)
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{
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/* FIXME: notify? */
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}
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static int
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checkcmap(int n, uint16* r, uint16* g, uint16* b)
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{
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while (n-- > 0)
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if (*r++ >= 256 || *g++ >= 256 || *b++ >= 256)
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return (16);
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/* Assuming 8-bit colormap */
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return (8);
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}
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static void
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invert_row(unsigned char *ptr, unsigned char *data, int n, int invert)
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{
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while (n--) {
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if (invert) *ptr++ = 255 - *data++;
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else *ptr++ = *data++;
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}
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}
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static void
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remap_row(unsigned char *ptr, unsigned char *data, int n,
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unsigned short *rmap, unsigned short *gmap, unsigned short *bmap)
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{
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unsigned int ix;
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while (n--) {
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ix = *data++;
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*ptr++ = (unsigned char) rmap[ix];
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*ptr++ = (unsigned char) gmap[ix];
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*ptr++ = (unsigned char) bmap[ix];
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}
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}
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static void
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copy_row(unsigned char *ptr, unsigned char *data, int n)
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{
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while (n--) {
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*ptr++ = *data++;
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*ptr++ = *data++;
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*ptr++ = *data++;
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}
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}
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static void
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interleave_row(unsigned char *ptr,
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unsigned char *red, unsigned char *blue, unsigned char *green,
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int n)
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{
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while (n--) {
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*ptr++ = *red++;
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*ptr++ = *green++;
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*ptr++ = *blue++;
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}
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}
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int
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simage_tiff_identify(const char *ptr,
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const unsigned char *header,
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int headerlen)
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{
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static unsigned char tifcmp[] = {0x4d, 0x4d, 0x0, 0x2a};
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static unsigned char tifcmp2[] = {0x49, 0x49, 0x2a, 0};
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if (headerlen < 4) return 0;
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if (memcmp((const void*)header, (const void*)tifcmp, 4) == 0) return 1;
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if (memcmp((const void*)header, (const void*)tifcmp2, 4) == 0) return 1;
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return 0;
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}
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/* useful defines (undef'ed below) */
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#define CVT(x) (((x) * 255L) / ((1L<<16)-1))
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#define pack(a,b) ((a)<<8 | (b))
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unsigned char *
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simage_tiff_load(const char *filename,
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int *width_ret,
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int *height_ret,
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int *numComponents_ret)
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{
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TIFF *in;
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uint16 samplesperpixel;
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uint16 bitspersample;
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uint16 photometric;
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uint32 w, h;
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uint16 config;
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uint16* red;
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uint16* green;
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uint16* blue;
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unsigned char *inbuf = NULL;
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tsize_t rowsize;
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uint32 row;
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int format;
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unsigned char *buffer;
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int width;
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int height;
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unsigned char *currPtr;
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TIFFSetErrorHandler(tiff_error);
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TIFFSetWarningHandler(tiff_warn);
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in = TIFFOpen(filename, "r");
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if (in == NULL) {
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tifferror = ERR_OPEN;
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return NULL;
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}
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if (TIFFGetField(in, TIFFTAG_PHOTOMETRIC, &photometric) == 1) {
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if (photometric != PHOTOMETRIC_RGB && photometric != PHOTOMETRIC_PALETTE &&
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photometric != PHOTOMETRIC_MINISWHITE &&
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photometric != PHOTOMETRIC_MINISBLACK) {
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/*Bad photometric; can only handle Grayscale, RGB and Palette images :-( */
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TIFFClose(in);
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tifferror = ERR_UNSUPPORTED;
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return NULL;
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}
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}
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else {
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tifferror = ERR_READ;
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TIFFClose(in);
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return NULL;
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}
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if (TIFFGetField(in, TIFFTAG_SAMPLESPERPIXEL, &samplesperpixel) == 1) {
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if (samplesperpixel != 1 && samplesperpixel != 3) {
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/* Bad samples/pixel */
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tifferror = ERR_UNSUPPORTED;
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TIFFClose(in);
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return NULL;
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}
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}
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else {
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tifferror = ERR_READ;
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TIFFClose(in);
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return NULL;
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}
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if (TIFFGetField(in, TIFFTAG_BITSPERSAMPLE, &bitspersample) == 1) {
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if (bitspersample != 8) {
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/* can only handle 8-bit samples. */
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TIFFClose(in);
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tifferror = ERR_UNSUPPORTED;
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return NULL;
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}
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}
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else {
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tifferror = ERR_READ;
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TIFFClose(in);
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return NULL;
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}
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if (TIFFGetField(in, TIFFTAG_IMAGEWIDTH, &w) != 1 ||
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TIFFGetField(in, TIFFTAG_IMAGELENGTH, &h) != 1 ||
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TIFFGetField(in, TIFFTAG_PLANARCONFIG, &config) != 1) {
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TIFFClose(in);
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tifferror = ERR_READ;
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return NULL;
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}
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if (photometric == PHOTOMETRIC_MINISWHITE ||
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photometric == PHOTOMETRIC_MINISBLACK)
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format = 1;
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else
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format = 3;
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buffer = (unsigned char*)malloc(w*h*format);
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if (!buffer) {
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tifferror = ERR_MEM;
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TIFFClose(in);
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return NULL;
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}
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width = w;
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height = h;
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currPtr = buffer + (h-1)*w*format;
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tifferror = ERR_NO_ERROR;
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switch (pack(photometric, config)) {
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case pack(PHOTOMETRIC_MINISWHITE, PLANARCONFIG_CONTIG):
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case pack(PHOTOMETRIC_MINISBLACK, PLANARCONFIG_CONTIG):
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case pack(PHOTOMETRIC_MINISWHITE, PLANARCONFIG_SEPARATE):
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case pack(PHOTOMETRIC_MINISBLACK, PLANARCONFIG_SEPARATE):
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inbuf = (unsigned char *)malloc(TIFFScanlineSize(in));
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for (row = 0; row < h; row++) {
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if (TIFFReadScanline(in, inbuf, row, 0) < 0) {
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tifferror = ERR_READ;
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break;
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}
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invert_row(currPtr, inbuf, w, photometric == PHOTOMETRIC_MINISWHITE);
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currPtr -= format*w;
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}
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break;
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case pack(PHOTOMETRIC_PALETTE, PLANARCONFIG_CONTIG):
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case pack(PHOTOMETRIC_PALETTE, PLANARCONFIG_SEPARATE):
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if (TIFFGetField(in, TIFFTAG_COLORMAP, &red, &green, &blue) != 1)
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tifferror = ERR_READ;
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/* */
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/* Convert 16-bit colormap to 8-bit (unless it looks */
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/* like an old-style 8-bit colormap). */
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/* */
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if (!tifferror && checkcmap(1<<bitspersample, red, green, blue) == 16) {
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int i;
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for (i = (1<<bitspersample)-1; i >= 0; i--) {
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red[i] = CVT(red[i]);
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green[i] = CVT(green[i]);
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blue[i] = CVT(blue[i]);
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}
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}
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inbuf = (unsigned char *)malloc(TIFFScanlineSize(in));
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for (row = 0; row < h; row++) {
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if (TIFFReadScanline(in, inbuf, row, 0) < 0) {
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tifferror = ERR_READ;
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break;
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}
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remap_row(currPtr, inbuf, w, red, green, blue);
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currPtr -= format*w;
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}
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break;
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case pack(PHOTOMETRIC_RGB, PLANARCONFIG_CONTIG):
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inbuf = (unsigned char *)malloc(TIFFScanlineSize(in));
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for (row = 0; row < h; row++) {
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if (TIFFReadScanline(in, inbuf, row, 0) < 0) {
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tifferror = ERR_READ;
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break;
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}
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copy_row(currPtr, inbuf, w);
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currPtr -= format*w;
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}
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break;
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case pack(PHOTOMETRIC_RGB, PLANARCONFIG_SEPARATE):
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rowsize = TIFFScanlineSize(in);
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inbuf = (unsigned char *)malloc(3*rowsize);
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for (row = 0; !tifferror && row < h; row++) {
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int s;
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for (s = 0; s < 3; s++) {
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if (TIFFReadScanline(in, (tdata_t)(inbuf+s*rowsize), (uint32)row, (tsample_t)s) < 0) {
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tifferror = ERR_READ; break;
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}
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}
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if (!tifferror) {
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interleave_row(currPtr, inbuf, inbuf+rowsize, inbuf+2*rowsize, w);
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currPtr -= format*w;
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}
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}
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break;
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default:
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tifferror = ERR_UNSUPPORTED;
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break;
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}
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if (inbuf) free(inbuf);
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TIFFClose(in);
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if (tifferror) {
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if (buffer) free(buffer);
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return NULL;
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}
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*width_ret = width;
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*height_ret = height;
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*numComponents_ret = format;
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return buffer;
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}
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#undef CVT
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#undef pack
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class ReaderWriterTIFF : public osg::ReaderWriter
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{
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public:
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virtual const char* className() { return "TIFF Image Reader"; }
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virtual bool acceptsExtension(const std::string& extension) { return extension=="tiff"; }
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virtual osg::Node* readNode(const std::string& fileName)
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{
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osg::Image* image = readImage(fileName);
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if (image)
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{
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osg::Geode* geode = osg::createGeodeForImage(image);
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if (geode==NULL) image->unref();
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return geode;
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}
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else
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{
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return NULL;
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}
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}
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virtual osg::Image* readImage(const std::string& fileName)
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{
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unsigned char *imageData = NULL;
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int width_ret;
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int height_ret;
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int numComponents_ret;
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imageData = simage_tiff_load(fileName.c_str(),&width_ret,&height_ret,&numComponents_ret);
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if (imageData==NULL) return NULL;
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int s = width_ret;
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int t = height_ret;
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int r = 1;
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int internalFormat = numComponents_ret;
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unsigned int pixelFormat =
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numComponents_ret == 1 ? GL_LUMINANCE :
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numComponents_ret == 2 ? GL_LUMINANCE_ALPHA :
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numComponents_ret == 3 ? GL_RGB :
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numComponents_ret == 4 ? GL_RGBA : (GLenum)-1;
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unsigned int dataType = GL_UNSIGNED_BYTE;
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osg::Image* pOsgImage = new osg::Image;
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pOsgImage->setFileName(fileName.c_str());
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pOsgImage->setImage(s,t,r,
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internalFormat,
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pixelFormat,
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dataType,
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imageData);
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return pOsgImage;
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}
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};
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// now register with Registry to instantiate the above
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// reader/writer.
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osg::RegisterReaderWriterProxy<ReaderWriterTIFF> g_readerWriter_TIFF_Proxy;
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