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added support for 32-bit floating-point TIFF output

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This commit is contained in:
Alberto Griggio
2017-11-20 00:11:18 +01:00
parent bc8b8902e6
commit 912f9f436b
4 changed files with 28 additions and 11 deletions
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23
rtengine/imageio.cc
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@@ -1250,20 +1250,28 @@ int ImageIO::saveTIFF (Glib::ustring fname, int bps, bool uncompressed)
}
#if __BYTE_ORDER__==__ORDER_LITTLE_ENDIAN__
bool needsReverse = bps == 16 && exifRoot->getOrder() == rtexif::MOTOROLA;
bool needsReverse = (bps == 16 || bps == 32) && exifRoot->getOrder() == rtexif::MOTOROLA;
#else
bool needsReverse = bps == 16 && exifRoot->getOrder() == rtexif::INTEL;
bool needsReverse = (bps == 16 || bps == 32) && exifRoot->getOrder() == rtexif::INTEL;
#endif
for (int i = 0; i < height; i++) {
getScanline (i, linebuffer, bps);
if (needsReverse)
for (int i = 0; i < lineWidth; i += 2) {
char c = linebuffer[i];
linebuffer[i] = linebuffer[i + 1];
linebuffer[i + 1] = c;
if (needsReverse) {
if (bps == 16) {
for (int i = 0; i < lineWidth; i += 2) {
char c = linebuffer[i];
linebuffer[i] = linebuffer[i + 1];
linebuffer[i + 1] = c;
}
} else {
for (int i = 0; i < lineWidth; i += 4) {
std::swap(linebuffer[i], linebuffer[i+3]);
std::swap(linebuffer[i+1], linebuffer[i+2]);
}
}
}
fwrite (linebuffer, lineWidth, 1, file);
@@ -1362,6 +1370,7 @@ int ImageIO::saveTIFF (Glib::ustring fname, int bps, bool uncompressed)
TIFFSetField (out, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_UINT);
TIFFSetField (out, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_RGB);
TIFFSetField (out, TIFFTAG_COMPRESSION, uncompressed ? COMPRESSION_NONE : COMPRESSION_DEFLATE);
TIFFSetField (out, TIFFTAG_SAMPLEFORMAT, bps == 32 ? SAMPLEFORMAT_IEEEFP : SAMPLEFORMAT_UINT);
if (!uncompressed) {
TIFFSetField (out, TIFFTAG_PREDICTOR, PREDICTOR_NONE);