tests/glean/wrtiff.cpp

   1 // BEGIN_COPYRIGHT
   2 //
   3 // Copyright (C) 1999  Allen Akin   All Rights Reserved.
   4 //
   5 // Permission is hereby granted, free of charge, to any person
   6 // obtaining a copy of this software and associated documentation
   7 // files (the "Software"), to deal in the Software without
   8 // restriction, including without limitation the rights to use,
   9 // copy, modify, merge, publish, distribute, sublicense, and/or
  10 // sell copies of the Software, and to permit persons to whom the
  11 // Software is furnished to do so, subject to the following
  12 // conditions:
  13 //
  14 // The above copyright notice and this permission notice shall be
  15 // included in all copies or substantial portions of the
  16 // Software.
  17 //
  18 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
  19 // KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
  20 // WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
  21 // PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL ALLEN AKIN BE
  22 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  23 // AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
  24 // OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  25 // DEALINGS IN THE SOFTWARE.
  26 //
  27 // END_COPYRIGHT
  28
  29
  30
  31
  32 // Implementation of image data, attribute, and I/O
  33
  34 #include "image.h"
  35 #include "tiffio.h"
  36
  37 namespace GLEAN {
  38
  39 ///////////////////////////////////////////////////////////////////////////////
  40 // writeTIFF - write image to TIFF file
  41 ///////////////////////////////////////////////////////////////////////////////
  42 void
  43 Image::writeTIFF(const char* filename) {
  44         static uint16 unassocAlpha[] = {EXTRASAMPLE_UNASSALPHA};
  45         GLsizei rowStep = rowSizeInBytes();
  46
  47         TIFF* tf = TIFFOpen(filename, "w");
  48         if (!tf)
  49                 throw CantOpen(filename);
  50
  51         TIFFSetField(tf, TIFFTAG_IMAGELENGTH, height());
  52         TIFFSetField(tf, TIFFTAG_IMAGEWIDTH, width());
  53         TIFFSetField(tf, TIFFTAG_XRESOLUTION, 100.0);
  54         TIFFSetField(tf, TIFFTAG_YRESOLUTION, 100.0);
  55         TIFFSetField(tf, TIFFTAG_RESOLUTIONUNIT, RESUNIT_INCH);
  56         TIFFSetField(tf, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT);
  57         TIFFSetField(tf, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
  58         TIFFSetField(tf, TIFFTAG_COMPRESSION, COMPRESSION_NONE);
  59                 // LZW would have been acceptable, were it not for patent
  60                 // issues.
  61         TIFFSetField(tf, TIFFTAG_ROWSPERSTRIP, height());
  62
  63         switch (format()) {
  64         case GL_LUMINANCE:
  65                 TIFFSetField(tf, TIFFTAG_SAMPLESPERPIXEL, 1);
  66                 TIFFSetField(tf, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_MINISBLACK);
  67                 break;
  68         case GL_LUMINANCE_ALPHA:
  69                 TIFFSetField(tf, TIFFTAG_SAMPLESPERPIXEL, 2);
  70                 TIFFSetField(tf, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_MINISBLACK);
  71                 TIFFSetField(tf, TIFFTAG_EXTRASAMPLES, 1, unassocAlpha);
  72                 break;
  73         case GL_RGB:
  74                 TIFFSetField(tf, TIFFTAG_SAMPLESPERPIXEL, 3);
  75                 TIFFSetField(tf, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_RGB);
  76                 break;
  77         case GL_RGBA:
  78                 TIFFSetField(tf, TIFFTAG_SAMPLESPERPIXEL, 4);
  79                 TIFFSetField(tf, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_RGB);
  80                 TIFFSetField(tf, TIFFTAG_EXTRASAMPLES, 1, unassocAlpha);
  81                 break;
  82         default:
  83                 TIFFClose(tf);
  84                 throw BadFormat(format());
  85         }
  86
  87         switch (type()) {
  88         case GL_BYTE:
  89                 TIFFSetField(tf, TIFFTAG_BITSPERSAMPLE, 8);
  90                 TIFFSetField(tf, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_INT);
  91                 break;
  92         case GL_UNSIGNED_BYTE:
  93                 TIFFSetField(tf, TIFFTAG_BITSPERSAMPLE, 8);
  94                 TIFFSetField(tf, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_UINT);
  95                 break;
  96         case GL_SHORT:
  97                 TIFFSetField(tf, TIFFTAG_BITSPERSAMPLE, 16);
  98                 TIFFSetField(tf, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_INT);
  99                 break;
 100         case GL_UNSIGNED_SHORT:
 101                 TIFFSetField(tf, TIFFTAG_BITSPERSAMPLE, 16);
 102                 TIFFSetField(tf, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_UINT);
 103                 break;
 104         case GL_INT:
 105                 TIFFSetField(tf, TIFFTAG_BITSPERSAMPLE, 32);
 106                 TIFFSetField(tf, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_INT);
 107                 break;
 108         case GL_UNSIGNED_INT:
 109                 TIFFSetField(tf, TIFFTAG_BITSPERSAMPLE, 32);
 110                 TIFFSetField(tf, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_UINT);
 111                 break;
 112         case GL_FLOAT:
 113                 TIFFSetField(tf, TIFFTAG_BITSPERSAMPLE, 32);
 114                 TIFFSetField(tf, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_IEEEFP);
 115                 break;
 116         default:
 117                 TIFFClose(tf);
 118                 throw BadType(type());
 119         }
 120
 121         {
 122                 // Write rows in reverse order, so that the usual OpenGL
 123                 // orientation won't result in an upside-down image for
 124                 // naive TIFF readers:
 125                 char* row = pixels() + (height() - 1) * rowStep;
 126                 for (GLsizei r = 0; r < height(); ++r, row -= rowStep)
 127                         TIFFWriteScanline(tf, row, r, 0);
 128         }
 129
 130         TIFFClose(tf);
 131 }; // Image::writeTIFF
 132
 133
 134 }; // namespace GLEAN