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path: root/tiff/contrib/win_dib/tiff2dib.c
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-rwxr-xr-xtiff/contrib/win_dib/tiff2dib.c379
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diff --git a/tiff/contrib/win_dib/tiff2dib.c b/tiff/contrib/win_dib/tiff2dib.c
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+/*************************************************************************
+ *
+ * Source file for Windows 95/Win32.
+ *
+ * The function LoadTIFFinDIB in this source file let you load
+ * a TIFF file and build a memory DIB with it and return the
+ * HANDLE (HDIB) of the memory bloc containing the DIB.
+ *
+ * Example :
+ *
+ * HDIB hDIB;
+ * hDIB = LoadTIFFinDIB("sample.tif");
+ *
+ *
+ * To build this source file you must include the TIFF library
+ * in your project.
+ *
+ * 4/12/95 Philippe Tenenhaus 100423.3705@compuserve.com
+ *
+ ************************************************************************/
+
+
+#include "tiffio.h"
+
+#define HDIB HANDLE
+#define IS_WIN30_DIB(lpbi) ((*(LPDWORD)(lpbi)) == sizeof(BITMAPINFOHEADER))
+#define CVT(x) (((x) * 255L) / ((1L<<16)-1))
+
+static HDIB CreateDIB(DWORD dwWidth, DWORD dwHeight, WORD wBitCount);
+static LPSTR FindDIBBits(LPSTR lpDIB);
+static WORD PaletteSize(LPSTR lpDIB);
+static WORD DIBNumColors(LPSTR lpDIB);
+static int checkcmap(int n, uint16* r, uint16* g, uint16* b);
+
+
+
+/*************************************************************************
+ *
+ * HDIB LoadTIFFinDIB(LPSTR lpFileName)
+ *
+ * Parameter:
+ *
+ * LPSTR lpDIB - File name of a tiff imag
+ *
+ * Return Value:
+ *
+ * LPSTR - HANDLE of a DIB
+ *
+ * Description:
+ *
+ * This function load a TIFF file and build a memory DIB with it
+ * and return the HANDLE (HDIB) of the memory bloc containing
+ * the DIB.
+ *
+ * 4/12/95 Philippe Tenenhaus 100423.3705@compuserve.com
+ *
+ ************************************************************************/
+
+HDIB LoadTIFFinDIB(LPSTR lpFileName)
+{
+ TIFF *tif;
+ unsigned long imageLength;
+ unsigned long imageWidth;
+ unsigned int BitsPerSample;
+ unsigned long LineSize;
+ unsigned int SamplePerPixel;
+ unsigned long RowsPerStrip;
+ int PhotometricInterpretation;
+ long nrow;
+ unsigned long row;
+ char *buf;
+ LPBITMAPINFOHEADER lpDIB;
+ HDIB hDIB;
+ char *lpBits;
+ HGLOBAL hStrip;
+ int i,l;
+ int Align;
+
+ tif = TIFFOpen(lpFileName, "r");
+
+ if (!tif)
+ goto TiffOpenError;
+
+ TIFFGetField(tif, TIFFTAG_IMAGEWIDTH, &imageWidth);
+ TIFFGetField(tif, TIFFTAG_IMAGELENGTH, &imageLength);
+ TIFFGetField(tif, TIFFTAG_BITSPERSAMPLE, &BitsPerSample);
+ TIFFGetField(tif, TIFFTAG_ROWSPERSTRIP, &RowsPerStrip);
+ TIFFGetField(tif, TIFFTAG_ROWSPERSTRIP, &RowsPerStrip);
+ TIFFGetField(tif, TIFFTAG_PHOTOMETRIC, &PhotometricInterpretation);
+
+ LineSize = TIFFScanlineSize(tif); //Number of byte in ine line
+
+ SamplePerPixel = (int) (LineSize/imageWidth);
+
+ //Align = Number of byte to add at the end of each line of the DIB
+ Align = 4 - (LineSize % 4);
+ if (Align == 4) Align = 0;
+
+
+ //Create a new DIB
+ hDIB = CreateDIB((DWORD) imageWidth, (DWORD) imageLength, (WORD)
+(BitsPerSample*SamplePerPixel));
+ lpDIB = (LPBITMAPINFOHEADER) GlobalLock(hDIB);
+ if (!lpDIB)
+ goto OutOfDIBMemory;
+
+ if (lpDIB)
+ lpBits = FindDIBBits((LPSTR) lpDIB);
+
+ //In the tiff file the lines are save from up to down
+ //In a DIB the lines must be save from down to up
+ if (lpBits)
+ {
+ lpBits = FindDIBBits((LPSTR) lpDIB);
+ lpBits+=((imageWidth*SamplePerPixel)+Align)*(imageLength-1);
+ //now lpBits pointe on the bottom line
+
+ hStrip = GlobalAlloc(GHND,TIFFStripSize(tif));
+ buf = GlobalLock(hStrip);
+
+ if (!buf)
+ goto OutOfBufMemory;
+
+ //PhotometricInterpretation = 2 image is RGB
+ //PhotometricInterpretation = 3 image have a color palette
+ if (PhotometricInterpretation == 3)
+ {
+ uint16* red;
+ uint16* green;
+ uint16* blue;
+ int16 i;
+ LPBITMAPINFO lpbmi;
+ int Palette16Bits;
+
+ TIFFGetField(tif, TIFFTAG_COLORMAP, &red, &green, &blue);
+
+ //Is the palette 16 or 8 bits ?
+ if (checkcmap(1<<BitsPerSample, red, green, blue) == 16)
+ Palette16Bits = TRUE;
+ else
+ Palette16Bits = FALSE;
+
+ lpbmi = (LPBITMAPINFO)lpDIB;
+
+ //load the palette in the DIB
+ for (i = (1<<BitsPerSample)-1; i >= 0; i--)
+ {
+ if (Palette16Bits)
+ {
+ lpbmi->bmiColors[i].rgbRed =(BYTE) CVT(red[i]);
+ lpbmi->bmiColors[i].rgbGreen = (BYTE) CVT(green[i]);
+ lpbmi->bmiColors[i].rgbBlue = (BYTE) CVT(blue[i]);
+ }
+ else
+ {
+ lpbmi->bmiColors[i].rgbRed = (BYTE) red[i];
+ lpbmi->bmiColors[i].rgbGreen = (BYTE) green[i];
+ lpbmi->bmiColors[i].rgbBlue = (BYTE) blue[i];
+ }
+ }
+
+ }
+
+ //read the tiff lines and save them in the DIB
+ //with RGB mode, we have to change the order of the 3 samples RGB
+<=> BGR
+ for (row = 0; row < imageLength; row += RowsPerStrip)
+ {
+ nrow = (row + RowsPerStrip > imageLength ? imageLength - row :
+RowsPerStrip);
+ if (TIFFReadEncodedStrip(tif, TIFFComputeStrip(tif, row, 0),
+ buf, nrow*LineSize)==-1)
+ {
+ goto TiffReadError;
+ }
+ else
+ {
+ for (l = 0; l < nrow; l++)
+ {
+ if (SamplePerPixel == 3)
+ for (i=0;i< (int) (imageWidth);i++)
+ {
+ lpBits[i*SamplePerPixel+0]=buf[l*LineSize+i*Sample
+PerPixel+2];
+ lpBits[i*SamplePerPixel+1]=buf[l*LineSize+i*Sample
+PerPixel+1];
+ lpBits[i*SamplePerPixel+2]=buf[l*LineSize+i*Sample
+PerPixel+0];
+ }
+ else
+ memcpy(lpBits, &buf[(int) (l*LineSize)], (int)
+imageWidth*SamplePerPixel);
+
+ lpBits-=imageWidth*SamplePerPixel+Align;
+
+ }
+ }
+ }
+ GlobalUnlock(hStrip);
+ GlobalFree(hStrip);
+ GlobalUnlock(hDIB);
+ TIFFClose(tif);
+ }
+
+ return hDIB;
+
+ OutOfBufMemory:
+
+ TiffReadError:
+ GlobalUnlock(hDIB);
+ GlobalFree(hStrip);
+ OutOfDIBMemory:
+ TIFFClose(tif);
+ TiffOpenError:
+ return (HANDLE) 0;
+
+
+}
+
+
+static int checkcmap(int n, uint16* r, uint16* g, uint16* b)
+{
+ while (n-- > 0)
+ if (*r++ >= 256 || *g++ >= 256 || *b++ >= 256)
+ return (16);
+
+ return (8);
+}
+
+
+
+/*************************************************************************
+ * All the following functions were created by microsoft, they are
+ * parts of the sample project "wincap" given with the SDK Win32.
+ *
+ * Microsoft says that :
+ *
+ * You have a royalty-free right to use, modify, reproduce and
+ * distribute the Sample Files (and/or any modified version) in
+ * any way you find useful, provided that you agree that
+ * Microsoft has no warranty obligations or liability for any
+ * Sample Application Files which are modified.
+ *
+ ************************************************************************/
+
+HDIB CreateDIB(DWORD dwWidth, DWORD dwHeight, WORD wBitCount)
+{
+ BITMAPINFOHEADER bi; // bitmap header
+ LPBITMAPINFOHEADER lpbi; // pointer to BITMAPINFOHEADER
+ DWORD dwLen; // size of memory block
+ HDIB hDIB;
+ DWORD dwBytesPerLine; // Number of bytes per scanline
+
+
+ // Make sure bits per pixel is valid
+ if (wBitCount <= 1)
+ wBitCount = 1;
+ else if (wBitCount <= 4)
+ wBitCount = 4;
+ else if (wBitCount <= 8)
+ wBitCount = 8;
+ else if (wBitCount <= 24)
+ wBitCount = 24;
+ else
+ wBitCount = 4; // set default value to 4 if parameter is bogus
+
+ // initialize BITMAPINFOHEADER
+ bi.biSize = sizeof(BITMAPINFOHEADER);
+ bi.biWidth = dwWidth; // fill in width from parameter
+ bi.biHeight = dwHeight; // fill in height from parameter
+ bi.biPlanes = 1; // must be 1
+ bi.biBitCount = wBitCount; // from parameter
+ bi.biCompression = BI_RGB;
+ bi.biSizeImage = (dwWidth*dwHeight*wBitCount)/8; //0; // 0's here
+mean "default"
+ bi.biXPelsPerMeter = 2834; //0;
+ bi.biYPelsPerMeter = 2834; //0;
+ bi.biClrUsed = 0;
+ bi.biClrImportant = 0;
+
+ // calculate size of memory block required to store the DIB. This
+ // block should be big enough to hold the BITMAPINFOHEADER, the color
+ // table, and the bits
+
+ dwBytesPerLine = (((wBitCount * dwWidth) + 31) / 32 * 4);
+ dwLen = bi.biSize + PaletteSize((LPSTR)&bi) + (dwBytesPerLine * dwHeight);
+
+ // alloc memory block to store our bitmap
+ hDIB = GlobalAlloc(GHND, dwLen);
+
+ // major bummer if we couldn't get memory block
+ if (!hDIB)
+ {
+ return NULL;
+ }
+
+ // lock memory and get pointer to it
+ lpbi = (VOID FAR *)GlobalLock(hDIB);
+
+ // use our bitmap info structure to fill in first part of
+ // our DIB with the BITMAPINFOHEADER
+ *lpbi = bi;
+
+ // Since we don't know what the colortable and bits should contain,
+ // just leave these blank. Unlock the DIB and return the HDIB.
+
+ GlobalUnlock(hDIB);
+
+ /* return handle to the DIB */
+ return hDIB;
+}
+
+
+LPSTR FAR FindDIBBits(LPSTR lpDIB)
+{
+ return (lpDIB + *(LPDWORD)lpDIB + PaletteSize(lpDIB));
+}
+
+
+WORD FAR PaletteSize(LPSTR lpDIB)
+{
+ /* calculate the size required by the palette */
+ if (IS_WIN30_DIB (lpDIB))
+ return (DIBNumColors(lpDIB) * sizeof(RGBQUAD));
+ else
+ return (DIBNumColors(lpDIB) * sizeof(RGBTRIPLE));
+}
+
+
+WORD DIBNumColors(LPSTR lpDIB)
+{
+ WORD wBitCount; // DIB bit count
+
+ /* If this is a Windows-style DIB, the number of colors in the
+ * color table can be less than the number of bits per pixel
+ * allows for (i.e. lpbi->biClrUsed can be set to some value).
+ * If this is the case, return the appropriate value.
+ */
+
+ if (IS_WIN30_DIB(lpDIB))
+ {
+ DWORD dwClrUsed;
+
+ dwClrUsed = ((LPBITMAPINFOHEADER)lpDIB)->biClrUsed;
+ if (dwClrUsed)
+ return (WORD)dwClrUsed;
+ }
+
+ /* Calculate the number of colors in the color table based on
+ * the number of bits per pixel for the DIB.
+ */
+ if (IS_WIN30_DIB(lpDIB))
+ wBitCount = ((LPBITMAPINFOHEADER)lpDIB)->biBitCount;
+ else
+ wBitCount = ((LPBITMAPCOREHEADER)lpDIB)->bcBitCount;
+
+ /* return number of colors based on bits per pixel */
+ switch (wBitCount)
+ {
+ case 1:
+ return 2;
+
+ case 4:
+ return 16;
+
+ case 8:
+ return 256;
+
+ default:
+ return 0;
+ }
+}
+/*
+ * Local Variables:
+ * mode: c
+ * c-basic-offset: 8
+ * fill-column: 78
+ * End:
+ */
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