diff options
Diffstat (limited to 'src/plugins/imageformats/tiff/qtiffhandler.cpp')
| -rw-r--r-- | src/plugins/imageformats/tiff/qtiffhandler.cpp | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/src/plugins/imageformats/tiff/qtiffhandler.cpp b/src/plugins/imageformats/tiff/qtiffhandler.cpp index 518e6d1..77dfeb3 100644 --- a/src/plugins/imageformats/tiff/qtiffhandler.cpp +++ b/src/plugins/imageformats/tiff/qtiffhandler.cpp @@ -168,7 +168,7 @@ bool QTiffHandler::read(QImage *image) break; default: // do nothing as defaults have already - // been set within the QImage class + // been set within the QImage class break; } for (uint32 y=0; y<height; ++y) @@ -218,6 +218,24 @@ bool QTiffHandler::write(const QImage &image) return false; } + // set the resolution + bool resolutionSet = false; + const int dotPerMeterX = image.dotsPerMeterX(); + const int dotPerMeterY = image.dotsPerMeterY(); + if ((dotPerMeterX % 100) == 0 + && (dotPerMeterY % 100) == 0) { + resolutionSet = TIFFSetField(tiff, TIFFTAG_RESOLUTIONUNIT, RESUNIT_CENTIMETER) + && TIFFSetField(tiff, TIFFTAG_XRESOLUTION, dotPerMeterX/100.0) + && TIFFSetField(tiff, TIFFTAG_YRESOLUTION, dotPerMeterY/100.0); + } else { + resolutionSet = TIFFSetField(tiff, TIFFTAG_RESOLUTIONUNIT, RESUNIT_INCH) + && TIFFSetField(tiff, TIFFTAG_XRESOLUTION, static_cast<float>(image.logicalDpiX())) + && TIFFSetField(tiff, TIFFTAG_YRESOLUTION, static_cast<float>(image.logicalDpiY())); + } + if (!resolutionSet) { + TIFFClose(tiff); + return false; + } // try to do the ARGB32 conversion in chunks no greater than 16 MB int chunks = (width * height * 4 / (1024 * 1024 * 16)) + 1; int chunkHeight = qMax(height / chunks, 1); |