mirror of
https://invent.kde.org/frameworks/kimageformats.git
synced 2025-06-03 17:08:08 -04:00
7899c27a80
- Added support for writing EXR files - Large image support (tested with 32GiB 16-bit image) - OpenEXR multithreaded read/write support through the use of line blocks - Build option to enable conversion to sRGB when read (disabled by default) - Multi-view image reading support - Options support: Size, ImageFormat, Quality, CompressRatio - Metadata write/read support via EXR attributes The plugin is now quite complete. It should also work on KF5 (not tested): if there is the will to include this MR also on KF5, let me know and I will do all the necessary tests.
859 lines
27 KiB
C++
859 lines
27 KiB
C++
/*
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The high dynamic range EXR format support for QImage.
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SPDX-FileCopyrightText: 2003 Brad Hards <bradh@frogmouth.net>
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SPDX-FileCopyrightText: 2023 Mirco Miranda <mircomir@outlook.com>
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SPDX-License-Identifier: LGPL-2.0-or-later
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*/
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/* *** EXR_USE_LEGACY_CONVERSIONS ***
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* If defined, the result image is an 8-bit RGB(A) converted
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* without icc profiles. Otherwise, a 16-bit images is generated.
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* NOTE: The use of legacy conversions are discouraged due to
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* imprecise image result.
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*/
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//#define EXR_USE_LEGACY_CONVERSIONS // default commented -> you should define it in your cmake file
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/* *** EXR_CONVERT_TO_SRGB ***
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* If defined, the linear data is converted to sRGB on read to accommodate
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* programs that do not support color profiles.
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* Otherwise the data are kept as is and it is the display program that
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* must convert to the monitor profile.
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* NOTE: If EXR_USE_LEGACY_CONVERSIONS is active, this is ignored.
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*/
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//#define EXR_CONVERT_TO_SRGB // default: commented -> you should define it in your cmake file
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/* *** EXR_STORE_XMP_ATTRIBUTE ***
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* If defined, disables the stores XMP values in a non-standard attribute named "xmp".
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* The QImage metadata used is "XML:com.adobe.xmp".
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* NOTE: The use of non-standard attributes is possible but discouraged by the specification. However,
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* metadata is essential for good image management and programs like darktable also set this
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* attribute. Gimp reads the "xmp" attribute and Darktable writes it as well.
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*/
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//#define EXR_DISABLE_XMP_ATTRIBUTE // default: commented -> you should define it in your cmake file
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/* *** EXR_MAX_IMAGE_WIDTH and EXR_MAX_IMAGE_HEIGHT ***
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* The maximum size in pixel allowed by the plugin.
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*/
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#ifndef EXR_MAX_IMAGE_WIDTH
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#define EXR_MAX_IMAGE_WIDTH 300000
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#endif
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#ifndef EXR_MAX_IMAGE_HEIGHT
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#define EXR_MAX_IMAGE_HEIGHT EXR_MAX_IMAGE_WIDTH
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#endif
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/* *** EXR_LINES_PER_BLOCK ***
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* Allows certain compression schemes to work in multithreading
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* Requires up to "LINES_PER_BLOCK * MAX_IMAGE_WIDTH * 8"
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* additional RAM (e.g. if 128, up to 307MiB of RAM).
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* There is a performance gain with the following parameters (based on empirical tests):
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* - PIZ compression needs 64+ lines
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* - ZIPS compression needs 8+ lines
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* - ZIP compression needs 32+ lines
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* - Others not tested
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*
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* NOTE: The OpenEXR documentation states that the higher the better :)
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*/
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#ifndef EXR_LINES_PER_BLOCK
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#define EXR_LINES_PER_BLOCK 128
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#endif
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#include "exr_p.h"
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#include "scanlineconverter_p.h"
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#include "util_p.h"
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#include <IexThrowErrnoExc.h>
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#include <ImathBox.h>
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#include <ImfArray.h>
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#include <ImfBoxAttribute.h>
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#include <ImfChannelListAttribute.h>
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#include <ImfCompressionAttribute.h>
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#include <ImfConvert.h>
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#include <ImfFloatAttribute.h>
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#include <ImfInputFile.h>
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#include <ImfInt64.h>
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#include <ImfIntAttribute.h>
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#include <ImfLineOrderAttribute.h>
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#include <ImfPreviewImage.h>
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#include <ImfRgbaFile.h>
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#include <ImfStandardAttributes.h>
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#include <ImfVersion.h>
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#include <iostream>
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#include <QColorSpace>
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#include <QDataStream>
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#include <QDebug>
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#include <QFloat16>
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#include <QImage>
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#include <QImageIOPlugin>
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#include <QLocale>
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#include <QThread>
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#if QT_VERSION >= QT_VERSION_CHECK(6, 5, 0)
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#include <QTimeZone>
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#endif
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// Allow the code to works on all QT versions supported by KDE
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// project (Qt 5.15 and Qt 6.x) to easy backports fixes.
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#if (QT_VERSION_MAJOR >= 6) && !defined(EXR_USE_LEGACY_CONVERSIONS)
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// If uncommented, the image is rendered in a float16 format, the result is very precise
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#define EXR_USE_QT6_FLOAT_IMAGE // default uncommented
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#endif
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class K_IStream : public Imf::IStream
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{
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public:
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K_IStream(QIODevice *dev, const QByteArray &fileName)
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: IStream(fileName.data())
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, m_dev(dev)
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{
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}
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bool read(char c[], int n) override;
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#if OPENEXR_VERSION_MAJOR > 2
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uint64_t tellg() override;
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void seekg(uint64_t pos) override;
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#else
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Imf::Int64 tellg() override;
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void seekg(Imf::Int64 pos) override;
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#endif
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void clear() override;
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private:
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QIODevice *m_dev;
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};
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bool K_IStream::read(char c[], int n)
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{
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qint64 result = m_dev->read(c, n);
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if (result > 0) {
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return true;
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} else if (result == 0) {
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throw Iex::InputExc("Unexpected end of file");
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} else { // negative value {
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Iex::throwErrnoExc("Error in read", result);
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}
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return false;
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}
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#if OPENEXR_VERSION_MAJOR > 2
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uint64_t K_IStream::tellg()
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#else
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Imf::Int64 K_IStream::tellg()
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#endif
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{
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return m_dev->pos();
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}
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#if OPENEXR_VERSION_MAJOR > 2
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void K_IStream::seekg(uint64_t pos)
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#else
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void K_IStream::seekg(Imf::Int64 pos)
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#endif
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{
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m_dev->seek(pos);
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}
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void K_IStream::clear()
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{
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// TODO
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}
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class K_OStream : public Imf::OStream
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{
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public:
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K_OStream(QIODevice *dev, const QByteArray &fileName)
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: OStream(fileName.data())
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, m_dev(dev)
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{
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}
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void write(const char c[/*n*/], int n) override;
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#if OPENEXR_VERSION_MAJOR > 2
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uint64_t tellp() override;
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void seekp(uint64_t pos) override;
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#else
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Imf::Int64 tellp() override;
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void seekp(Imf::Int64 pos) override;
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#endif
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private:
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QIODevice *m_dev;
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};
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void K_OStream::write(const char c[], int n)
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{
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qint64 result = m_dev->write(c, n);
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if (result > 0) {
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return;
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} else { // negative value {
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Iex::throwErrnoExc("Error in write", result);
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}
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return;
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}
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#if OPENEXR_VERSION_MAJOR > 2
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uint64_t K_OStream::tellp()
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#else
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Imf::Int64 K_OStream::tellg()
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#endif
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{
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return m_dev->pos();
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}
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#if OPENEXR_VERSION_MAJOR > 2
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void K_OStream::seekp(uint64_t pos)
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#else
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void K_OStream::seekg(Imf::Int64 pos)
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#endif
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{
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m_dev->seek(pos);
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}
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#ifdef EXR_USE_LEGACY_CONVERSIONS
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// source: https://openexr.com/en/latest/ReadingAndWritingImageFiles.html
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inline unsigned char gamma(float x)
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{
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x = std::pow(5.5555f * std::max(0.f, x), 0.4545f) * 84.66f;
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return (unsigned char)qBound(0.f, x, 255.f);
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}
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inline QRgb RgbaToQrgba(struct Imf::Rgba &imagePixel)
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{
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return qRgba(gamma(float(imagePixel.r)),
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gamma(float(imagePixel.g)),
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gamma(float(imagePixel.b)),
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(unsigned char)(qBound(0.f, imagePixel.a * 255.f, 255.f) + 0.5f));
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}
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#endif
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EXRHandler::EXRHandler()
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: m_compressionRatio(-1)
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, m_quality(-1)
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, m_imageNumber(-1)
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, m_imageCount(0)
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, m_startPos(-1)
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{
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// Set the number of threads to use (0 is allowed)
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Imf::setGlobalThreadCount(QThread::idealThreadCount() / 2);
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}
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bool EXRHandler::canRead() const
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{
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if (canRead(device())) {
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setFormat("exr");
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return true;
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}
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return false;
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}
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static QImage::Format imageFormat(const Imf::RgbaInputFile &file)
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{
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auto isRgba = file.channels() & Imf::RgbaChannels::WRITE_A;
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#if defined(EXR_USE_LEGACY_CONVERSIONS)
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return (isRgba ? QImage::Format_ARGB32 : QImage::Format_RGB32);
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#elif defined(EXR_USE_QT6_FLOAT_IMAGE)
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return (isRgba ? QImage::Format_RGBA16FPx4 : QImage::Format_RGBX16FPx4);
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#else
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return (isRgba ? QImage::Format_RGBA64 : QImage::Format_RGBX64);
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#endif
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}
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/*!
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* \brief viewList
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* \param header
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* \return The list of available views.
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*/
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static QStringList viewList(const Imf::Header &h)
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{
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QStringList l;
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if (auto views = h.findTypedAttribute<Imf::StringVectorAttribute>("multiView")) {
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for (auto &&v : views->value()) {
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l << QString::fromStdString(v);
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}
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}
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return l;
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}
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#ifdef QT_DEBUG
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void printAttributes(const Imf::Header &h)
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{
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for (auto i = h.begin(); i != h.end(); ++i) {
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qDebug() << i.name();
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}
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}
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#endif
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/*!
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* \brief readMetadata
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* Reads EXR attributes from the \a header and set its as metadata in the \a image.
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*/
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static void readMetadata(const Imf::Header &header, QImage &image)
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{
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// set some useful metadata
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if (auto comments = header.findTypedAttribute<Imf::StringAttribute>("comments")) {
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image.setText(QStringLiteral("Comment"), QString::fromStdString(comments->value()));
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}
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if (auto owner = header.findTypedAttribute<Imf::StringAttribute>("owner")) {
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image.setText(QStringLiteral("Owner"), QString::fromStdString(owner->value()));
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}
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if (auto lat = header.findTypedAttribute<Imf::FloatAttribute>("latitude")) {
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image.setText(QStringLiteral("Latitude"), QLocale::c().toString(lat->value()));
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}
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if (auto lon = header.findTypedAttribute<Imf::FloatAttribute>("longitude")) {
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image.setText(QStringLiteral("Longitude"), QLocale::c().toString(lon->value()));
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}
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if (auto alt = header.findTypedAttribute<Imf::FloatAttribute>("altitude")) {
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image.setText(QStringLiteral("Altitude"), QLocale::c().toString(alt->value()));
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}
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if (auto capDate = header.findTypedAttribute<Imf::StringAttribute>("capDate")) {
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float off = 0;
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if (auto utcOffset = header.findTypedAttribute<Imf::FloatAttribute>("utcOffset")) {
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off = utcOffset->value();
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}
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auto dateTime = QDateTime::fromString(QString::fromStdString(capDate->value()), QStringLiteral("yyyy:MM:dd HH:mm:ss"));
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if (dateTime.isValid()) {
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#if QT_VERSION >= QT_VERSION_CHECK(6, 5, 0)
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dateTime.setTimeZone(QTimeZone::fromSecondsAheadOfUtc(off));
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#else
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dateTime.setOffsetFromUtc(off);
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#endif
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image.setText(QStringLiteral("CreationDate"), dateTime.toString(Qt::ISODate));
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}
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}
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if (auto xDensity = header.findTypedAttribute<Imf::FloatAttribute>("xDensity")) {
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float par = 1;
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if (auto pixelAspectRatio = header.findTypedAttribute<Imf::FloatAttribute>("pixelAspectRatio")) {
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par = pixelAspectRatio->value();
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}
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image.setDotsPerMeterX(qRound(xDensity->value() * 100.0 / 2.54));
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image.setDotsPerMeterY(qRound(xDensity->value() * par * 100.0 / 2.54));
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}
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// Non-standard attribute
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if (auto xmp = header.findTypedAttribute<Imf::StringAttribute>("xmp")) {
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image.setText(QStringLiteral("XML:com.adobe.xmp"), QString::fromStdString(xmp->value()));
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}
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/* TODO: OpenEXR 3.2 metadata
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*
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* New Optional Standard Attributes:
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* - Support automated editorial workflow:
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* reelName, imageCounter, ascFramingDecisionList
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*
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* - Support forensics (“which other shots used that camera and lens before the camera firmware was updated?”):
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* cameraMake, cameraModel, cameraSerialNumber, cameraFirmware, cameraUuid, cameraLabel, lensMake, lensModel,
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* lensSerialNumber, lensFirmware, cameraColorBalance
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*
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* -Support pickup shots (reproduce critical camera settings):
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* shutterAngle, cameraCCTSetting, cameraTintSetting
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*
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* - Support metadata-driven match move:
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* sensorCenterOffset, sensorOverallDimensions, sensorPhotositePitch, sensorAcquisitionRectanglenominalFocalLength,
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* effectiveFocalLength, pinholeFocalLength, entrancePupilOffset, tStop(complementing existing 'aperture')
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*/
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}
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/*!
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* \brief readColorSpace
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* Reads EXR chromaticities from the \a header and set its as color profile in the \a image.
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*/
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static void readColorSpace(const Imf::Header &header, QImage &image)
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{
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// final color operations
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#ifndef EXR_USE_LEGACY_CONVERSIONS
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QColorSpace cs;
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if (auto chroma = header.findTypedAttribute<Imf::ChromaticitiesAttribute>("chromaticities")) {
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auto &&v = chroma->value();
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cs = QColorSpace(QPointF(v.white.x, v.white.y),
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QPointF(v.red.x, v.red.y),
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QPointF(v.green.x, v.green.y),
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QPointF(v.blue.x, v.blue.y),
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QColorSpace::TransferFunction::Linear);
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}
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if (!cs.isValid()) {
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cs = QColorSpace(QColorSpace::SRgbLinear);
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}
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image.setColorSpace(cs);
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#ifdef EXR_CONVERT_TO_SRGB
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image.convertToColorSpace(QColorSpace(QColorSpace::SRgb));
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#endif
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#endif // !EXR_USE_LEGACY_CONVERSIONS
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}
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bool EXRHandler::read(QImage *outImage)
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{
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try {
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auto d = device();
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// set the image position after the first run.
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if (!d->isSequential()) {
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if (m_startPos < 0) {
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m_startPos = d->pos();
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} else {
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d->seek(m_startPos);
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}
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}
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K_IStream istr(d, QByteArray());
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Imf::RgbaInputFile file(istr);
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auto &&header = file.header();
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// set the image to load
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if (m_imageNumber > -1) {
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auto views = viewList(header);
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if (m_imageNumber < views.count()) {
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file.setLayerName(views.at(m_imageNumber).toStdString());
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}
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}
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// get image info
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Imath::Box2i dw = file.dataWindow();
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qint32 width = dw.max.x - dw.min.x + 1;
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qint32 height = dw.max.y - dw.min.y + 1;
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// limiting the maximum image size on a reasonable size (as done in other plugins)
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if (width > EXR_MAX_IMAGE_WIDTH || height > EXR_MAX_IMAGE_HEIGHT) {
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qWarning() << "The maximum image size is limited to" << EXR_MAX_IMAGE_WIDTH << "x" << EXR_MAX_IMAGE_HEIGHT << "px";
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return false;
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}
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// creating the image
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QImage image = imageAlloc(width, height, imageFormat(file));
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if (image.isNull()) {
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qWarning() << "Failed to allocate image, invalid size?" << QSize(width, height);
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return false;
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}
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Imf::Array2D<Imf::Rgba> pixels;
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pixels.resizeErase(EXR_LINES_PER_BLOCK, width);
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bool isRgba = image.hasAlphaChannel();
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// somehow copy pixels into image
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for (int y = 0, n = 0; y < height; y += n) {
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auto my = dw.min.y + y;
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if (my > dw.max.y) { // paranoia check
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break;
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}
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file.setFrameBuffer(&pixels[0][0] - dw.min.x - qint64(my) * width, 1, width);
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file.readPixels(my, std::min(my + EXR_LINES_PER_BLOCK - 1, dw.max.y));
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for (n = 0; n < std::min(EXR_LINES_PER_BLOCK, height - y); ++n) {
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#if defined(EXR_USE_LEGACY_CONVERSIONS)
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Q_UNUSED(isRgba)
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auto scanLine = reinterpret_cast<QRgb *>(image.scanLine(y + n));
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for (int x = 0; x < width; ++x) {
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*(scanLine + x) = RgbaToQrgba(pixels[n][x]);
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}
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#elif defined(EXR_USE_QT6_FLOAT_IMAGE)
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auto scanLine = reinterpret_cast<qfloat16 *>(image.scanLine(y + n));
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for (int x = 0; x < width; ++x) {
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auto xcs = x * 4;
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*(scanLine + xcs) = qfloat16(qBound(0.f, float(pixels[n][x].r), 1.f));
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*(scanLine + xcs + 1) = qfloat16(qBound(0.f, float(pixels[n][x].g), 1.f));
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*(scanLine + xcs + 2) = qfloat16(qBound(0.f, float(pixels[n][x].b), 1.f));
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*(scanLine + xcs + 3) = qfloat16(isRgba ? qBound(0.f, float(pixels[n][x].a), 1.f) : 1.f);
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}
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#else
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auto scanLine = reinterpret_cast<QRgba64 *>(image.scanLine(y + n));
|
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for (int x = 0; x < width; ++x) {
|
||
*(scanLine + x) = QRgba64::fromRgba64(quint16(qBound(0.f, float(pixels[n][x].r) * 65535.f + 0.5f, 65535.f)),
|
||
quint16(qBound(0.f, float(pixels[n][x].g) * 65535.f + 0.5f, 65535.f)),
|
||
quint16(qBound(0.f, float(pixels[n][x].b) * 65535.f + 0.5f, 65535.f)),
|
||
isRgba ? quint16(qBound(0.f, float(pixels[n][x].a) * 65535.f + 0.5f, 65535.f)) : quint16(65535));
|
||
}
|
||
#endif
|
||
}
|
||
}
|
||
|
||
// set some useful metadata
|
||
readMetadata(header, image);
|
||
// final color operations
|
||
readColorSpace(header, image);
|
||
|
||
*outImage = image;
|
||
|
||
return true;
|
||
} catch (const std::exception &) {
|
||
return false;
|
||
}
|
||
}
|
||
|
||
/*!
|
||
* \brief makePreview
|
||
* Creates a preview of maximum 256 x 256 pixels from the \a image.
|
||
*/
|
||
bool makePreview(const QImage &image, Imf::Array2D<Imf::PreviewRgba> &pixels)
|
||
{
|
||
auto w = image.width();
|
||
auto h = image.height();
|
||
|
||
QImage preview;
|
||
if (w > h) {
|
||
preview = image.scaledToWidth(256).convertToFormat(QImage::Format_ARGB32);
|
||
} else {
|
||
preview = image.scaledToHeight(256).convertToFormat(QImage::Format_ARGB32);
|
||
}
|
||
if (preview.isNull()) {
|
||
return false;
|
||
}
|
||
|
||
w = preview.width();
|
||
h = preview.height();
|
||
pixels.resizeErase(h, w);
|
||
preview.convertToColorSpace(QColorSpace(QColorSpace::SRgb));
|
||
|
||
for (int y = 0; y < h; ++y) {
|
||
auto scanLine = reinterpret_cast<const QRgb *>(preview.constScanLine(y));
|
||
for (int x = 0; x < w; ++x) {
|
||
auto &&out = pixels[y][x];
|
||
out.r = qRed(*(scanLine + x));
|
||
out.g = qGreen(*(scanLine + x));
|
||
out.b = qBlue(*(scanLine + x));
|
||
out.a = qAlpha(*(scanLine + x));
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/*!
|
||
* \brief setMetadata
|
||
* Reades the metadata from \a image and set its as attributes in the \a header.
|
||
*/
|
||
static void setMetadata(const QImage &image, Imf::Header &header)
|
||
{
|
||
auto dateTime = QDateTime::currentDateTime();
|
||
for (auto &&key : image.textKeys()) {
|
||
auto text = image.text(key);
|
||
if (!key.compare(QStringLiteral("Comment"), Qt::CaseInsensitive)) {
|
||
header.insert("comments", Imf::StringAttribute(text.toStdString()));
|
||
}
|
||
|
||
if (!key.compare(QStringLiteral("Owner"), Qt::CaseInsensitive)) {
|
||
header.insert("owner", Imf::StringAttribute(text.toStdString()));
|
||
}
|
||
|
||
// clang-format off
|
||
if (!key.compare(QStringLiteral("Latitude"), Qt::CaseInsensitive) ||
|
||
!key.compare(QStringLiteral("Longitude"), Qt::CaseInsensitive) ||
|
||
!key.compare(QStringLiteral("Altitude"), Qt::CaseInsensitive)) {
|
||
// clang-format on
|
||
auto ok = false;
|
||
auto value = QLocale::c().toFloat(text, &ok);
|
||
if (ok) {
|
||
header.insert(qPrintable(key.toLower()), Imf::FloatAttribute(value));
|
||
}
|
||
}
|
||
|
||
if (!key.compare(QStringLiteral("CreationDate"), Qt::CaseInsensitive)) {
|
||
auto dt = QDateTime::fromString(text, Qt::ISODate);
|
||
if (dt.isValid()) {
|
||
dateTime = dt;
|
||
}
|
||
}
|
||
|
||
#ifndef EXR_DISABLE_XMP_ATTRIBUTE // warning: Non-standard attribute!
|
||
if (!key.compare(QStringLiteral("XML:com.adobe.xmp"), Qt::CaseInsensitive)) {
|
||
header.insert("xmp", Imf::StringAttribute(text.toStdString()));
|
||
}
|
||
#endif
|
||
}
|
||
if (dateTime.isValid()) {
|
||
header.insert("capDate", Imf::StringAttribute(dateTime.toString(QStringLiteral("yyyy:MM:dd HH:mm:ss")).toStdString()));
|
||
header.insert("utcOffset", Imf::FloatAttribute(dateTime.offsetFromUtc()));
|
||
}
|
||
|
||
if (image.dotsPerMeterX() && image.dotsPerMeterY()) {
|
||
header.insert("xDensity", Imf::FloatAttribute(image.dotsPerMeterX() * 2.54f / 100.f));
|
||
header.insert("pixelAspectRatio", Imf::FloatAttribute(float(image.dotsPerMeterX()) / float(image.dotsPerMeterY())));
|
||
}
|
||
|
||
// set default chroma (default constructor ITU-R BT.709-3 -> sRGB)
|
||
// The image is converted to Linear sRGB so, the chroma is the default EXR value.
|
||
// If a file doesn’t have a chromaticities attribute, display software should assume that the
|
||
// file’s primaries and the white point match Rec. ITU-R BT.709-3.
|
||
// header.insert("chromaticities", Imf::ChromaticitiesAttribute(Imf::Chromaticities()));
|
||
|
||
// TODO: EXR 3.2 attributes (see readMetadata())
|
||
}
|
||
|
||
bool EXRHandler::write(const QImage &image)
|
||
{
|
||
try {
|
||
// create EXR header
|
||
qint32 width = image.width();
|
||
qint32 height = image.height();
|
||
|
||
// limiting the maximum image size on a reasonable size (as done in other plugins)
|
||
if (width > EXR_MAX_IMAGE_WIDTH || height > EXR_MAX_IMAGE_HEIGHT) {
|
||
qWarning() << "The maximum image size is limited to" << EXR_MAX_IMAGE_WIDTH << "x" << EXR_MAX_IMAGE_HEIGHT << "px";
|
||
return false;
|
||
}
|
||
|
||
Imf::Header header(width, height);
|
||
// set compression scheme (forcing PIZ as default)
|
||
header.compression() = Imf::Compression::PIZ_COMPRESSION;
|
||
if (m_compressionRatio >= qint32(Imf::Compression::NO_COMPRESSION) && m_compressionRatio < qint32(Imf::Compression::NUM_COMPRESSION_METHODS)) {
|
||
header.compression() = Imf::Compression(m_compressionRatio);
|
||
}
|
||
// set the DCT quality (used by DCT compressions only)
|
||
if (m_quality > -1 && m_quality <= 100) {
|
||
header.dwaCompressionLevel() = float(m_quality);
|
||
}
|
||
// make ZIP compression fast (used by ZIP compressions)
|
||
header.zipCompressionLevel() = 1;
|
||
|
||
// set preview (don't set it for small images)
|
||
if (width > 1024 || height > 1024) {
|
||
Imf::Array2D<Imf::PreviewRgba> previewPixels;
|
||
if (makePreview(image, previewPixels)) {
|
||
header.setPreviewImage(Imf::PreviewImage(previewPixels.width(), previewPixels.height(), &previewPixels[0][0]));
|
||
}
|
||
}
|
||
|
||
// set metadata (EXR attributes)
|
||
setMetadata(image, header);
|
||
|
||
// write the EXR
|
||
K_OStream ostr(device(), QByteArray());
|
||
Imf::RgbaOutputFile file(ostr, header, image.hasAlphaChannel() ? Imf::RgbaChannels::WRITE_RGBA : Imf::RgbaChannels::WRITE_RGB);
|
||
Imf::Array2D<Imf::Rgba> pixels;
|
||
pixels.resizeErase(EXR_LINES_PER_BLOCK, width);
|
||
|
||
// convert the image and write into the stream
|
||
#if defined(EXR_USE_QT6_FLOAT_IMAGE)
|
||
auto convFormat = image.hasAlphaChannel() ? QImage::Format_RGBA16FPx4 : QImage::Format_RGBX16FPx4;
|
||
#else
|
||
auto convFormat = image.hasAlphaChannel() ? QImage::Format_RGBA64 : QImage::Format_RGBX64;
|
||
#endif
|
||
ScanLineConverter slc(convFormat);
|
||
slc.setDefaultSourceColorSpace(QColorSpace(QColorSpace::SRgb));
|
||
slc.setTargetColorSpace(QColorSpace(QColorSpace::SRgbLinear));
|
||
for (int y = 0, n = 0; y < height; y += n) {
|
||
for (n = 0; n < std::min(EXR_LINES_PER_BLOCK, height - y); ++n) {
|
||
#if defined(EXR_USE_QT6_FLOAT_IMAGE)
|
||
auto scanLine = reinterpret_cast<const qfloat16 *>(slc.convertedScanLine(image, y + n));
|
||
if (scanLine == nullptr) {
|
||
return false;
|
||
}
|
||
for (int x = 0; x < width; ++x) {
|
||
auto xcs = x * 4;
|
||
pixels[n][x].r = float(*(scanLine + xcs));
|
||
pixels[n][x].g = float(*(scanLine + xcs + 1));
|
||
pixels[n][x].b = float(*(scanLine + xcs + 2));
|
||
pixels[n][x].a = float(*(scanLine + xcs + 3));
|
||
}
|
||
#else
|
||
auto scanLine = reinterpret_cast<const QRgba64 *>(slc.convertedScanLine(image, y + n));
|
||
if (scanLine == nullptr) {
|
||
return false;
|
||
}
|
||
for (int x = 0; x < width; ++x) {
|
||
pixels[n][x].r = float((scanLine + x)->red() / 65535.f);
|
||
pixels[n][x].g = float((scanLine + x)->green() / 65535.f);
|
||
pixels[n][x].b = float((scanLine + x)->blue() / 65535.f);
|
||
pixels[n][x].a = float((scanLine + x)->alpha() / 65535.f);
|
||
}
|
||
#endif
|
||
}
|
||
file.setFrameBuffer(&pixels[0][0] - qint64(y) * width, 1, width);
|
||
file.writePixels(n);
|
||
}
|
||
} catch (const std::exception &) {
|
||
return false;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
void EXRHandler::setOption(ImageOption option, const QVariant &value)
|
||
{
|
||
if (option == QImageIOHandler::CompressionRatio) {
|
||
auto ok = false;
|
||
auto cr = value.toInt(&ok);
|
||
if (ok) {
|
||
m_compressionRatio = cr;
|
||
}
|
||
}
|
||
if (option == QImageIOHandler::Quality) {
|
||
auto ok = false;
|
||
auto q = value.toInt(&ok);
|
||
if (ok) {
|
||
m_quality = q;
|
||
}
|
||
}
|
||
}
|
||
|
||
bool EXRHandler::supportsOption(ImageOption option) const
|
||
{
|
||
if (option == QImageIOHandler::Size) {
|
||
return true;
|
||
}
|
||
if (option == QImageIOHandler::ImageFormat) {
|
||
return true;
|
||
}
|
||
if (option == QImageIOHandler::CompressionRatio) {
|
||
return true;
|
||
}
|
||
if (option == QImageIOHandler::Quality) {
|
||
return true;
|
||
}
|
||
return false;
|
||
}
|
||
|
||
QVariant EXRHandler::option(ImageOption option) const
|
||
{
|
||
QVariant v;
|
||
|
||
if (option == QImageIOHandler::Size) {
|
||
if (auto d = device()) {
|
||
// transactions works on both random and sequential devices
|
||
d->startTransaction();
|
||
try {
|
||
K_IStream istr(d, QByteArray());
|
||
Imf::RgbaInputFile file(istr);
|
||
if (m_imageNumber > -1) { // set the image to read
|
||
auto views = viewList(file.header());
|
||
if (m_imageNumber < views.count()) {
|
||
file.setLayerName(views.at(m_imageNumber).toStdString());
|
||
}
|
||
}
|
||
Imath::Box2i dw = file.dataWindow();
|
||
v = QVariant(QSize(dw.max.x - dw.min.x + 1, dw.max.y - dw.min.y + 1));
|
||
} catch (const std::exception &) {
|
||
// broken file or unsupported version
|
||
}
|
||
d->rollbackTransaction();
|
||
}
|
||
}
|
||
|
||
if (option == QImageIOHandler::ImageFormat) {
|
||
if (auto d = device()) {
|
||
// transactions works on both random and sequential devices
|
||
d->startTransaction();
|
||
try {
|
||
K_IStream istr(d, QByteArray());
|
||
Imf::RgbaInputFile file(istr);
|
||
v = QVariant::fromValue(imageFormat(file));
|
||
} catch (const std::exception &) {
|
||
// broken file or unsupported version
|
||
}
|
||
d->rollbackTransaction();
|
||
}
|
||
}
|
||
|
||
if (option == QImageIOHandler::CompressionRatio) {
|
||
v = QVariant(m_compressionRatio);
|
||
}
|
||
|
||
if (option == QImageIOHandler::Quality) {
|
||
v = QVariant(m_quality);
|
||
}
|
||
|
||
return v;
|
||
}
|
||
|
||
bool EXRHandler::jumpToNextImage()
|
||
{
|
||
return jumpToImage(m_imageNumber + 1);
|
||
}
|
||
|
||
bool EXRHandler::jumpToImage(int imageNumber)
|
||
{
|
||
if (imageNumber >= imageCount()) {
|
||
return false;
|
||
}
|
||
m_imageNumber = imageNumber;
|
||
return true;
|
||
}
|
||
|
||
int EXRHandler::imageCount() const
|
||
{
|
||
// NOTE: image count is cached for performance reason
|
||
auto &&count = m_imageCount;
|
||
if (count > 0) {
|
||
return count;
|
||
}
|
||
|
||
count = QImageIOHandler::imageCount();
|
||
|
||
auto d = device();
|
||
d->startTransaction();
|
||
|
||
try {
|
||
K_IStream istr(d, QByteArray());
|
||
Imf::RgbaInputFile file(istr);
|
||
auto views = viewList(file.header());
|
||
if (!views.isEmpty()) {
|
||
count = views.size();
|
||
}
|
||
} catch (const std::exception &) {
|
||
// do nothing
|
||
}
|
||
|
||
d->rollbackTransaction();
|
||
|
||
return count;
|
||
}
|
||
|
||
int EXRHandler::currentImageNumber() const
|
||
{
|
||
return m_imageNumber;
|
||
}
|
||
|
||
bool EXRHandler::canRead(QIODevice *device)
|
||
{
|
||
if (!device) {
|
||
qWarning("EXRHandler::canRead() called with no device");
|
||
return false;
|
||
}
|
||
|
||
const QByteArray head = device->peek(4);
|
||
|
||
return Imf::isImfMagic(head.data());
|
||
}
|
||
|
||
QImageIOPlugin::Capabilities EXRPlugin::capabilities(QIODevice *device, const QByteArray &format) const
|
||
{
|
||
if (format == "exr") {
|
||
return Capabilities(CanRead | CanWrite);
|
||
}
|
||
if (!format.isEmpty()) {
|
||
return {};
|
||
}
|
||
if (!device->isOpen()) {
|
||
return {};
|
||
}
|
||
|
||
Capabilities cap;
|
||
if (device->isReadable() && EXRHandler::canRead(device)) {
|
||
cap |= CanRead;
|
||
}
|
||
if (device->isWritable()) {
|
||
cap |= CanWrite;
|
||
}
|
||
return cap;
|
||
}
|
||
|
||
QImageIOHandler *EXRPlugin::create(QIODevice *device, const QByteArray &format) const
|
||
{
|
||
QImageIOHandler *handler = new EXRHandler;
|
||
handler->setDevice(device);
|
||
handler->setFormat(format);
|
||
return handler;
|
||
}
|
||
|
||
#include "moc_exr_p.cpp"
|