450 lines
13 KiB
C++
450 lines
13 KiB
C++
#include "StdAfx.h"
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//#define STRICT
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#include <windows.h>
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#include <windowsx.h>
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#include <commdlg.h>
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#include <stdlib.h> // MAX_ constants
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#include "diblib.h"
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/*--------------------------------------------------------------------
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READ TIFF
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Load the TIFF data from the file into memory. Return
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a pointer to a valid DIB (or NULL for errors).
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Uses the TIFFRGBA interface to libtiff.lib to convert
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most file formats to a useable form. We just keep the 32 bit
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form of the data to display, rather than optimizing for the
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display.
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Main entry points:
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int ChkTIFF ( LPCTSTR lpszPath )
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PVOID ReadTIFF ( LPCTSTR lpszPath )
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RETURN
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A valid DIB pointer for success; NULL for failure.
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--------------------------------------------------------------------*/
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#include "TiffLib/tiff.h"
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#include "TiffLib/tiffio.h"
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#include <assert.h>
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#include <stdio.h>
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// piggyback some data on top of the RGBA Image
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struct TIFFDibImage {
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TIFFRGBAImage tif;
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int dibinstalled;
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} ;
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HANDLE LoadTIFFinDIB(LPCTSTR lpFileName);
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HANDLE TIFFRGBA2DIB(TIFFDibImage* dib, uint32* raster) ;
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static void
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MyWarningHandler(const char* module, const char* fmt, va_list ap)
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{
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// ignore all warnings (unused tags, etc)
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return;
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}
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static void
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MyErrorHandler(const char* module, const char* fmt, va_list ap)
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{
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return;
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}
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// Turn off the error and warning handlers to check if a valid file.
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// Necessary because of the way that the Doc loads images and restart files.
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int ChkTIFF ( LPCTSTR lpszPath )
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{
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int rtn = 0;
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TIFFErrorHandler eh;
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TIFFErrorHandler wh;
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eh = TIFFSetErrorHandler(NULL);
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wh = TIFFSetWarningHandler(NULL);
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TIFF* tif = TIFFOpen(lpszPath, "r");
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if (tif) {
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rtn = 1;
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TIFFClose(tif);
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}
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TIFFSetErrorHandler(eh);
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TIFFSetWarningHandler(wh);
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return rtn;
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}
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void DibInstallHack(TIFFDibImage* img) ;
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PVOID ReadTIFF ( LPCTSTR lpszPath )
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{
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void* pDIB = 0;
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TIFFErrorHandler wh;
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wh = TIFFSetWarningHandler(MyWarningHandler);
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if (ChkTIFF(lpszPath)) {
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TIFF* tif = TIFFOpen(lpszPath, "r");
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if (tif) {
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char emsg[1024];
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if (TIFFRGBAImageOK(tif, emsg)) {
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TIFFDibImage img;
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char emsg[1024];
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if (TIFFRGBAImageBegin(&img.tif, tif, -1, emsg)) {
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size_t npixels;
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uint32* raster;
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DibInstallHack(&img);
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npixels = img.tif.width * img.tif.height;
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raster = (uint32*) _TIFFmalloc(npixels * sizeof (uint32));
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if (raster != NULL) {
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if (TIFFRGBAImageGet(&img.tif, raster, img.tif.width, img.tif.height)) {
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pDIB = TIFFRGBA2DIB(&img, raster);
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}
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}
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_TIFFfree(raster);
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}
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TIFFRGBAImageEnd(&img.tif);
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}
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else {
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TRACE("Unable to open image(%s): %s\n", lpszPath, emsg );
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}
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TIFFClose(tif);
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}
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}
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TIFFSetWarningHandler(wh);
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return pDIB;
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}
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HANDLE TIFFRGBA2DIB(TIFFDibImage* dib, uint32* raster)
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{
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void* pDIB = 0;
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TIFFRGBAImage* img = &dib->tif;
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uint32 imageLength;
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uint32 imageWidth;
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uint16 BitsPerSample;
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uint16 SamplePerPixel;
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uint32 RowsPerStrip;
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uint16 PhotometricInterpretation;
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BITMAPINFOHEADER bi;
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int dwDIBSize ;
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TIFFGetField(img->tif, TIFFTAG_IMAGEWIDTH, &imageWidth);
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TIFFGetField(img->tif, TIFFTAG_IMAGELENGTH, &imageLength);
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TIFFGetField(img->tif, TIFFTAG_BITSPERSAMPLE, &BitsPerSample);
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TIFFGetField(img->tif, TIFFTAG_ROWSPERSTRIP, &RowsPerStrip);
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TIFFGetField(img->tif, TIFFTAG_SAMPLESPERPIXEL, &SamplePerPixel);
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TIFFGetField(img->tif, TIFFTAG_PHOTOMETRIC, &PhotometricInterpretation);
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if ( BitsPerSample == 1 && SamplePerPixel == 1 && dib->dibinstalled ) { // bilevel
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bi.biSize = sizeof(BITMAPINFOHEADER);
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bi.biWidth = imageWidth;
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bi.biHeight = imageLength;
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bi.biPlanes = 1; // always
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bi.biBitCount = 1;
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bi.biCompression = BI_RGB;
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bi.biSizeImage = WIDTHBYTES(bi.biWidth * bi.biBitCount) * bi.biHeight;
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bi.biXPelsPerMeter = 0;
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bi.biYPelsPerMeter = 0;
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bi.biClrUsed = 0; // must be zero for RGB compression (none)
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bi.biClrImportant = 0; // always
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// Get the size of the DIB
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dwDIBSize = GetDIBSize( &bi );
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// Allocate for the BITMAPINFO structure and the color table.
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pDIB = GlobalAllocPtr( GHND, dwDIBSize );
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if (pDIB == 0) {
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return( NULL );
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}
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// Copy the header info
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*((BITMAPINFOHEADER*)pDIB) = bi;
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// Get a pointer to the color table
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RGBQUAD *pRgbq = (RGBQUAD *)((LPSTR)pDIB + sizeof(BITMAPINFOHEADER));
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pRgbq[0].rgbRed = 0;
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pRgbq[0].rgbBlue = 0;
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pRgbq[0].rgbGreen = 0;
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pRgbq[0].rgbReserved = 0;
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pRgbq[1].rgbRed = 255;
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pRgbq[1].rgbBlue = 255;
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pRgbq[1].rgbGreen = 255;
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pRgbq[1].rgbReserved = 255;
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// Pointers to the bits
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//PVOID pbiBits = (LPSTR)pRgbq + bi.biClrUsed * sizeof(RGBQUAD);
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//
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// In the BITMAPINFOHEADER documentation, it appears that
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// there should be no color table for 32 bit images, but
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// experience shows that the image is off by 3 words if it
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// is not included. So here it is.
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PVOID pbiBits = GetDIBImagePtr((BITMAPINFOHEADER*)pDIB); //(LPSTR)pRgbq + 3 * sizeof(RGBQUAD);
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int sizeWords = bi.biSizeImage/4;
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RGBQUAD* rgbDib = (RGBQUAD*)pbiBits;
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long* rgbTif = (long*)raster;
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_TIFFmemcpy(pbiBits, raster, bi.biSizeImage);
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}
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// For now just always default to the RGB 32 bit form. // save as 32 bit for simplicity
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else if ( true /*BitsPerSample == 8 && SamplePerPixel == 3*/ ) { // 24 bit color
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bi.biSize = sizeof(BITMAPINFOHEADER);
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bi.biWidth = imageWidth;
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bi.biHeight = imageLength;
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bi.biPlanes = 1; // always
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bi.biBitCount = 32;
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bi.biCompression = BI_RGB;
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bi.biSizeImage = WIDTHBYTES(bi.biWidth * bi.biBitCount) * bi.biHeight;
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bi.biXPelsPerMeter = 0;
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bi.biYPelsPerMeter = 0;
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bi.biClrUsed = 0; // must be zero for RGB compression (none)
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bi.biClrImportant = 0; // always
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// Get the size of the DIB
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dwDIBSize = GetDIBSize( &bi );
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// Allocate for the BITMAPINFO structure and the color table.
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pDIB = GlobalAllocPtr( GHND, dwDIBSize );
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if (pDIB == 0) {
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return( NULL );
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}
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// Copy the header info
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*((BITMAPINFOHEADER*)pDIB) = bi;
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// Get a pointer to the color table
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RGBQUAD *pRgbq = (RGBQUAD *)((LPSTR)pDIB + sizeof(BITMAPINFOHEADER));
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// Pointers to the bits
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//PVOID pbiBits = (LPSTR)pRgbq + bi.biClrUsed * sizeof(RGBQUAD);
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//
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// In the BITMAPINFOHEADER documentation, it appears that
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// there should be no color table for 32 bit images, but
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// experience shows that the image is off by 3 words if it
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// is not included. So here it is.
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PVOID pbiBits = (LPSTR)pRgbq + 3 * sizeof(RGBQUAD);
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int sizeWords = bi.biSizeImage/4;
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RGBQUAD* rgbDib = (RGBQUAD*)pbiBits;
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long* rgbTif = (long*)raster;
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// Swap the byte order while copying
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for ( int i = 0 ; i < sizeWords ; ++i )
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{
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rgbDib[i].rgbRed = TIFFGetR(rgbTif[i]);
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rgbDib[i].rgbBlue = TIFFGetB(rgbTif[i]);
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rgbDib[i].rgbGreen = TIFFGetG(rgbTif[i]);
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rgbDib[i].rgbReserved = 0;
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}
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}
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return pDIB;
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}
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///////////////////////////////////////////////////////////////
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//
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// Hacked from tif_getimage.c in libtiff in v3.5.7
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//
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//
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typedef unsigned char u_char;
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#define DECLAREContigPutFunc(name) \
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static void name(\
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TIFFRGBAImage* img, \
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uint32* cp, \
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uint32 x, uint32 y, \
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uint32 w, uint32 h, \
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int32 fromskew, int32 toskew, \
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u_char* pp \
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)
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#define DECLARESepPutFunc(name) \
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static void name(\
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TIFFRGBAImage* img,\
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uint32* cp,\
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uint32 x, uint32 y, \
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uint32 w, uint32 h,\
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int32 fromskew, int32 toskew,\
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u_char* r, u_char* g, u_char* b, u_char* a\
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)
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DECLAREContigPutFunc(putContig1bitTile);
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static int getStripContig1Bit(TIFFRGBAImage* img, uint32* uraster, uint32 w, uint32 h);
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//typdef struct TIFFDibImage {
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// TIFFRGBAImage tif;
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// dibinstalled;
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//} TIFFDibImage ;
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void DibInstallHack(TIFFDibImage* dib) {
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TIFFRGBAImage* img = &dib->tif;
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dib->dibinstalled = false;
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switch (img->photometric) {
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case PHOTOMETRIC_MINISWHITE:
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case PHOTOMETRIC_MINISBLACK:
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switch (img->bitspersample) {
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case 1:
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img->put.contig = putContig1bitTile;
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img->get = getStripContig1Bit;
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dib->dibinstalled = true;
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break;
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}
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break;
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}
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}
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/*
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* 1-bit packed samples => 1-bit
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*
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* Override to just copy the data
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*/
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DECLAREContigPutFunc(putContig1bitTile)
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{
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int samplesperpixel = img->samplesperpixel;
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(void) y;
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fromskew *= samplesperpixel;
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int wb = WIDTHBYTES(w);
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u_char* ucp = (u_char*)cp;
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/* Conver 'w' to bytes from pixels (rounded up) */
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w = (w+7)/8;
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while (h-- > 0) {
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_TIFFmemcpy(ucp, pp, w);
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/*
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for (x = wb; x-- > 0;) {
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*cp++ = rgbi(Map[pp[0]], Map[pp[1]], Map[pp[2]]);
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pp += samplesperpixel;
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}
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*/
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ucp += (wb + toskew);
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pp += (w + fromskew);
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}
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}
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/*
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* Hacked from the tif_getimage.c file.
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*/
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static uint32
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setorientation(TIFFRGBAImage* img, uint32 h)
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{
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TIFF* tif = img->tif;
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uint32 y;
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switch (img->orientation) {
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case ORIENTATION_BOTRIGHT:
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case ORIENTATION_RIGHTBOT: /* XXX */
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case ORIENTATION_LEFTBOT: /* XXX */
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TIFFWarning(TIFFFileName(tif), "using bottom-left orientation");
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img->orientation = ORIENTATION_BOTLEFT;
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/* fall thru... */
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case ORIENTATION_BOTLEFT:
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y = 0;
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break;
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case ORIENTATION_TOPRIGHT:
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case ORIENTATION_RIGHTTOP: /* XXX */
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case ORIENTATION_LEFTTOP: /* XXX */
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default:
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TIFFWarning(TIFFFileName(tif), "using top-left orientation");
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img->orientation = ORIENTATION_TOPLEFT;
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/* fall thru... */
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case ORIENTATION_TOPLEFT:
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y = h-1;
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break;
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}
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return (y);
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}
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/*
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* Get a strip-organized image that has
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* PlanarConfiguration contiguous if SamplesPerPixel > 1
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* or
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* SamplesPerPixel == 1
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*
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* Hacked from the tif_getimage.c file.
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*
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* This is set up to allow us to just copy the data to the raster
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* for 1-bit bitmaps
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*/
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static int
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getStripContig1Bit(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h)
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{
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TIFF* tif = img->tif;
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tileContigRoutine put = img->put.contig;
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uint16 orientation;
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uint32 row, y, nrow, rowstoread;
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uint32 pos;
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u_char* buf;
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uint32 rowsperstrip;
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uint32 imagewidth = img->width;
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tsize_t scanline;
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int32 fromskew, toskew;
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tstrip_t strip;
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tsize_t stripsize;
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u_char* braster = (u_char*)raster; // byte wide raster
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uint32 wb = WIDTHBYTES(w);
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int ret = 1;
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buf = (u_char*) _TIFFmalloc(TIFFStripSize(tif));
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if (buf == 0) {
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TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "No space for strip buffer");
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return (0);
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}
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y = setorientation(img, h);
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orientation = img->orientation;
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toskew = -(int32) (orientation == ORIENTATION_TOPLEFT ? wb+wb : wb-wb);
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TIFFGetFieldDefaulted(tif, TIFFTAG_ROWSPERSTRIP, &rowsperstrip);
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scanline = TIFFScanlineSize(tif);
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fromskew = (w < imagewidth ? imagewidth - w : 0)/8;
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for (row = 0; row < h; row += nrow)
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{
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rowstoread = rowsperstrip - (row + img->row_offset) % rowsperstrip;
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nrow = (row + rowstoread > h ? h - row : rowstoread);
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strip = TIFFComputeStrip(tif,row+img->row_offset, 0);
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stripsize = ((row + img->row_offset)%rowsperstrip + nrow) * scanline;
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if (TIFFReadEncodedStrip(tif, strip, buf, stripsize ) < 0
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&& img->stoponerr)
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{
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ret = 0;
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break;
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}
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pos = ((row + img->row_offset) % rowsperstrip) * scanline;
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(*put)(img, (uint32*)(braster+y*wb), 0, y, w, nrow, fromskew, toskew, buf + pos);
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y += (orientation == ORIENTATION_TOPLEFT ?-(int32) nrow : (int32) nrow);
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}
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_TIFFfree(buf);
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return (ret);
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}
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/*
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* Local Variables:
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* mode: c++
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* c-basic-offset: 8
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* fill-column: 78
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* End:
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*/
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