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Add floating point read and write to TIFF handler 

[ChangeLog][TIFF] Read/write support for floating point image
formats added.

Change-Id: Ib952ef9bfe7e38426f018515a5f92ed56c732a6f
Reviewed-by: Eirik Aavitsland <eirik.aavitsland@qt.io>
This commit is contained in:
Allan Sandfeld Jensen 2021-05-31 10:56:52 +02:00
parent a3e96cef46
commit 95f02ee91f
3 changed files with 127 additions and 14 deletions
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124
src/plugins/imageformats/tiff/qtiffhandler.cpp
View File

@ -38,11 +38,13 @@
****************************************************************************/
#include "qtiffhandler_p.h"
#include <qvariant.h>
#include <qcolorspace.h>
#include <qdebug.h>
#include <qfloat16.h>
#include <qimage.h>
#include <qglobal.h>
#include <qvariant.h>
extern "C" {
#include "tiffio.h"
}
@ -118,6 +120,7 @@ public:
QSize size;
uint16_t photometric;
bool grayscale;
bool floatingPoint;
bool headersRead;
int currentDirectory;
int directoryCount;
@ -271,6 +274,10 @@ bool QTiffHandlerPrivate::readHeaders(QIODevice *device)
uint16_t samplesPerPixel; // they may be e.g. grayscale with 2 samples per pixel
if (!TIFFGetField(tiff, TIFFTAG_SAMPLESPERPIXEL, &samplesPerPixel))
samplesPerPixel = 1;
uint16_t sampleFormat;
if (!TIFFGetField(tiff, TIFFTAG_SAMPLEFORMAT, &sampleFormat))
sampleFormat = SAMPLEFORMAT_VOID;
floatingPoint = (sampleFormat == SAMPLEFORMAT_IEEEFP);
grayscale = photometric == PHOTOMETRIC_MINISBLACK || photometric == PHOTOMETRIC_MINISWHITE;
@ -278,13 +285,15 @@ bool QTiffHandlerPrivate::readHeaders(QIODevice *device)
format = QImage::Format_Mono;
else if (photometric == PHOTOMETRIC_MINISBLACK && bitPerSample == 8 && samplesPerPixel == 1)
format = QImage::Format_Grayscale8;
else if (photometric == PHOTOMETRIC_MINISBLACK && bitPerSample == 16 && samplesPerPixel == 1)
else if (photometric == PHOTOMETRIC_MINISBLACK && bitPerSample == 16 && samplesPerPixel == 1 && !floatingPoint)
format = QImage::Format_Grayscale16;
else if ((grayscale || photometric == PHOTOMETRIC_PALETTE) && bitPerSample == 8 && samplesPerPixel == 1)
format = QImage::Format_Indexed8;
else if (samplesPerPixel < 4)
if (bitPerSample == 16 && photometric == PHOTOMETRIC_RGB)
format = QImage::Format_RGBX64;
format = floatingPoint ? QImage::Format_RGBX16FPx4 : QImage::Format_RGBX64;
else if (bitPerSample == 32 && floatingPoint && photometric == PHOTOMETRIC_RGB)
format = QImage::Format_RGBX32FPx4;
else
format = QImage::Format_RGB32;
else {
@ -304,9 +313,16 @@ bool QTiffHandlerPrivate::readHeaders(QIODevice *device)
if (gotField && count && extrasamples[0] == EXTRASAMPLE_UNASSALPHA)
premultiplied = false;
if (premultiplied)
format = QImage::Format_RGBA64_Premultiplied;
format = floatingPoint ? QImage::Format_RGBA16FPx4_Premultiplied : QImage::Format_RGBA64_Premultiplied;
else
format = QImage::Format_RGBA64;
format = floatingPoint ? QImage::Format_RGBA16FPx4 : QImage::Format_RGBA64;
} else if (bitPerSample == 32 && floatingPoint && photometric == PHOTOMETRIC_RGB) {
if (gotField && count && extrasamples[0] == EXTRASAMPLE_UNASSALPHA)
premultiplied = false;
if (premultiplied)
format = QImage::Format_RGBA32FPx4_Premultiplied;
else
format = QImage::Format_RGBA32FPx4;
} else {
if (premultiplied)
format = QImage::Format_ARGB32_Premultiplied;
@ -407,12 +423,16 @@ bool QTiffHandler::read(QImage *image)
bool format8bit = (format == QImage::Format_Mono || format == QImage::Format_Indexed8 || format == QImage::Format_Grayscale8);
bool format16bit = (format == QImage::Format_Grayscale16);
bool format64bit = (format == QImage::Format_RGBX64 || format == QImage::Format_RGBA64 || format == QImage::Format_RGBA64_Premultiplied);
bool format64fp = (format == QImage::Format_RGBX16FPx4 || format == QImage::Format_RGBA16FPx4 || format == QImage::Format_RGBA16FPx4_Premultiplied);
bool format128fp = (format == QImage::Format_RGBX32FPx4 || format == QImage::Format_RGBA32FPx4 || format == QImage::Format_RGBA32FPx4_Premultiplied);
// Formats we read directly, instead of over RGBA32:
if (format8bit || format16bit || format64bit) {
if (format8bit || format16bit || format64bit || format64fp || format128fp) {
int bytesPerPixel = image->depth() / 8;
if (format == QImage::Format_RGBX64)
if (format == QImage::Format_RGBX64 || format == QImage::Format_RGBX16FPx4)
bytesPerPixel = 6;
else if (format == QImage::Format_RGBX32FPx4)
bytesPerPixel = 12;
if (TIFFIsTiled(tiff)) {
quint32 tileWidth, tileLength;
TIFFGetField(tiff, TIFFTAG_TILEWIDTH, &tileWidth);
@ -461,8 +481,10 @@ bool QTiffHandler::read(QImage *image)
}
}
}
if (format == QImage::Format_RGBX64)
rgb48fixup(image);
if (format == QImage::Format_RGBX64 || format == QImage::Format_RGBX16FPx4)
rgb48fixup(image, d->floatingPoint);
else if (format == QImage::Format_RGBX32FPx4)
rgb96fixup(image);
} else {
const int stopOnError = 1;
if (TIFFReadRGBAImageOriented(tiff, width, height, reinterpret_cast<uint32_t *>(image->bits()), qt2Exif(d->transformation), stopOnError)) {
@ -667,6 +689,7 @@ bool QTiffHandler::write(const QImage &image)
if (!TIFFSetField(tiff, TIFFTAG_PHOTOMETRIC, photometric)
|| !TIFFSetField(tiff, TIFFTAG_COMPRESSION, compression == NoCompression ? COMPRESSION_NONE : COMPRESSION_LZW)
|| !TIFFSetField(tiff, TIFFTAG_BITSPERSAMPLE, image.depth())
|| !TIFFSetField(tiff, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_UINT)
|| !TIFFSetField(tiff, TIFFTAG_ROWSPERSTRIP, defaultStripSize(tiff))) {
TIFFClose(tiff);
return false;
@ -711,11 +734,15 @@ bool QTiffHandler::write(const QImage &image)
}
}
TIFFClose(tiff);
} else if (format == QImage::Format_RGBX64) {
} else if (format == QImage::Format_RGBX64 || format == QImage::Format_RGBX16FPx4) {
if (!TIFFSetField(tiff, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_RGB)
|| !TIFFSetField(tiff, TIFFTAG_COMPRESSION, compression == NoCompression ? COMPRESSION_NONE : COMPRESSION_LZW)
|| !TIFFSetField(tiff, TIFFTAG_SAMPLESPERPIXEL, 3)
|| !TIFFSetField(tiff, TIFFTAG_BITSPERSAMPLE, 16)
|| !TIFFSetField(tiff, TIFFTAG_SAMPLEFORMAT,
format == QImage::Format_RGBX64
? SAMPLEFORMAT_UINT
: SAMPLEFORMAT_IEEEFP)
|| !TIFFSetField(tiff, TIFFTAG_ROWSPERSTRIP, TIFFDefaultStripSize(tiff, 0))) {
TIFFClose(tiff);
return false;
@ -743,6 +770,54 @@ bool QTiffHandler::write(const QImage &image)
|| !TIFFSetField(tiff, TIFFTAG_COMPRESSION, compression == NoCompression ? COMPRESSION_NONE : COMPRESSION_LZW)
|| !TIFFSetField(tiff, TIFFTAG_SAMPLESPERPIXEL, 4)
|| !TIFFSetField(tiff, TIFFTAG_BITSPERSAMPLE, 16)
|| !TIFFSetField(tiff, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_UINT)
|| !TIFFSetField(tiff, TIFFTAG_EXTRASAMPLES, 1, &extrasamples)
|| !TIFFSetField(tiff, TIFFTAG_ROWSPERSTRIP, TIFFDefaultStripSize(tiff, 0))) {
TIFFClose(tiff);
return false;
}
for (int y = 0; y < height; ++y) {
if (TIFFWriteScanline(tiff, (void*)image.scanLine(y), y) != 1) {
TIFFClose(tiff);
return false;
}
}
TIFFClose(tiff);
} else if (format == QImage::Format_RGBX32FPx4) {
if (!TIFFSetField(tiff, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_RGB)
|| !TIFFSetField(tiff, TIFFTAG_COMPRESSION, compression == NoCompression ? COMPRESSION_NONE : COMPRESSION_LZW)
|| !TIFFSetField(tiff, TIFFTAG_SAMPLESPERPIXEL, 3)
|| !TIFFSetField(tiff, TIFFTAG_BITSPERSAMPLE, 32)
|| !TIFFSetField(tiff, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_IEEEFP)
|| !TIFFSetField(tiff, TIFFTAG_ROWSPERSTRIP, TIFFDefaultStripSize(tiff, 0))) {
TIFFClose(tiff);
return false;
}
std::unique_ptr<float[]> line(new float[width * 3]);
for (int y = 0; y < height; ++y) {
const float *srcLine = reinterpret_cast<const float *>(image.constScanLine(y));
for (int x = 0; x < width; ++x) {
line[x * 3 + 0] = srcLine[x * 4 + 0];
line[x * 3 + 1] = srcLine[x * 4 + 1];
line[x * 3 + 2] = srcLine[x * 4 + 2];
}
if (TIFFWriteScanline(tiff, (void*)line.get(), y) != 1) {
TIFFClose(tiff);
return false;
}
}
TIFFClose(tiff);
} else if (format == QImage::Format_RGBA16FPx4 || format == QImage::Format_RGBA32FPx4
|| format == QImage::Format_RGBA16FPx4_Premultiplied
|| format == QImage::Format_RGBA32FPx4_Premultiplied) {
const bool premultiplied = image.format() != QImage::Format_RGBA16FPx4 && image.format() != QImage::Format_RGBA32FPx4;
const uint16_t extrasamples = premultiplied ? EXTRASAMPLE_ASSOCALPHA : EXTRASAMPLE_UNASSALPHA;
if (!TIFFSetField(tiff, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_RGB)
|| !TIFFSetField(tiff, TIFFTAG_COMPRESSION, compression == NoCompression ? COMPRESSION_NONE : COMPRESSION_LZW)
|| !TIFFSetField(tiff, TIFFTAG_SAMPLESPERPIXEL, 4)
|| !TIFFSetField(tiff, TIFFTAG_BITSPERSAMPLE, image.depth() == 64 ? 16 : 32)
|| !TIFFSetField(tiff, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_IEEEFP)
|| !TIFFSetField(tiff, TIFFTAG_EXTRASAMPLES, 1, &extrasamples)
|| !TIFFSetField(tiff, TIFFTAG_ROWSPERSTRIP, TIFFDefaultStripSize(tiff, 0))) {
TIFFClose(tiff);
@ -910,17 +985,40 @@ void QTiffHandler::convert32BitOrder(void *buffer, int width)
}
}
void QTiffHandler::rgb48fixup(QImage *image)
void QTiffHandler::rgb48fixup(QImage *image, bool floatingPoint)
{
Q_ASSERT(image->depth() == 64);
const int h = image->height();
const int w = image->width();
uchar *scanline = image->bits();
const qsizetype bpl = image->bytesPerLine();
quint16 mask = 0xffff;
const qfloat16 fp_mask = 1.0f;
if (floatingPoint)
memcpy(&mask, &fp_mask, 2);
for (int y = 0; y < h; ++y) {
quint16 *dst = reinterpret_cast<uint16_t *>(scanline);
for (int x = w - 1; x >= 0; --x) {
dst[x * 4 + 3] = 0xffff;
dst[x * 4 + 3] = mask;
dst[x * 4 + 2] = dst[x * 3 + 2];
dst[x * 4 + 1] = dst[x * 3 + 1];
dst[x * 4 + 0] = dst[x * 3 + 0];
}
scanline += bpl;
}
}
void QTiffHandler::rgb96fixup(QImage *image)
{
Q_ASSERT(image->depth() == 128);
const int h = image->height();
const int w = image->width();
uchar *scanline = image->bits();
const qsizetype bpl = image->bytesPerLine();
for (int y = 0; y < h; ++y) {
float *dst = reinterpret_cast<float *>(scanline);
for (int x = w - 1; x >= 0; --x) {
dst[x * 4 + 3] = 1.0f;
dst[x * 4 + 2] = dst[x * 3 + 2];
dst[x * 4 + 1] = dst[x * 3 + 1];
dst[x * 4 + 0] = dst[x * 3 + 0];

3
src/plugins/imageformats/tiff/qtiffhandler_p.h
View File

@ -72,7 +72,8 @@ public:
};
private:
void convert32BitOrder(void *buffer, int width);
void rgb48fixup(QImage *image);
void rgb48fixup(QImage *image, bool floatingPoint);
void rgb96fixup(QImage *image);
const QScopedPointer<QTiffHandlerPrivate> d;
bool ensureHaveDirectoryCount() const;
};

14
tests/auto/tiff/tst_qtiff.cpp
View File

@ -407,6 +407,20 @@ void tst_qtiff::readWriteNonDestructive_data()
QTest::newRow("tiff rgb64") << QImage::Format_RGBX64 << QImage::Format_RGBX64 << QImageIOHandler::TransformationNone;
QTest::newRow("tiff rgba64") << QImage::Format_RGBA64 << QImage::Format_RGBA64 << QImageIOHandler::TransformationRotate90;
QTest::newRow("tiff rgba64pm") << QImage::Format_RGBA64_Premultiplied << QImage::Format_RGBA64_Premultiplied << QImageIOHandler::TransformationNone;
QTest::newRow("tiff rgb16fpx4") << QImage::Format_RGBX16FPx4 << QImage::Format_RGBX16FPx4
<< QImageIOHandler::TransformationNone;
QTest::newRow("tiff rgba16fpx4") << QImage::Format_RGBA16FPx4 << QImage::Format_RGBA16FPx4
<< QImageIOHandler::TransformationRotate90;
QTest::newRow("tiff rgba16fpx4pm") << QImage::Format_RGBA16FPx4_Premultiplied
<< QImage::Format_RGBA16FPx4_Premultiplied
<< QImageIOHandler::TransformationNone;
QTest::newRow("tiff rgb32fpx4") << QImage::Format_RGBX32FPx4 << QImage::Format_RGBX32FPx4
<< QImageIOHandler::TransformationNone;
QTest::newRow("tiff rgba32fpx4") << QImage::Format_RGBA32FPx4 << QImage::Format_RGBA32FPx4
<< QImageIOHandler::TransformationRotate90;
QTest::newRow("tiff rgba32fpx4pm") << QImage::Format_RGBA32FPx4_Premultiplied
<< QImage::Format_RGBA32FPx4_Premultiplied
<< QImageIOHandler::TransformationNone;
}
void tst_qtiff::readWriteNonDestructive()