Differential D24521 Diff 67556 lib/thumbnailprovider/thumbnailgenerator.cpp

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lib/thumbnailprovider/thumbnailgenerator.cpp

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22	#include "thumbnailgenerator.h"	22	#include "thumbnailgenerator.h"
23		23
24	// Local	24	// Local
25	#include "jpegcontent.h"
26	#include "gwenviewconfig.h"	25	#include "gwenviewconfig.h"
27	#include "exiv2imageloader.h"	26	#include "exiv2imageloader.h"
28		27
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58	{	57	{
59	mImage = QImage();	58	mImage = QImage();
60	mNeedCaching = true;	59	mNeedCaching = true;
61	QImage originalImage;	60
62	QSize originalSize;	61	Exiv2ImageLoader content;
		62	bool exivContentAvailable = content.load(pixPath);
		63	int previewRatio = 1;
		64
		65	// If there's jpeg content (from jpg or raw files), try to load an embedded thumbnail, if available.
		66	if (exivContentAvailable) {
		67	QImage thumbnail = content.thumbnail();
		68
		69	// If the user does not care about the generated thumbnails (by deleting them on exit), use ANY
		70	// embedded thumnail, even if it's too small.
		71	if (!thumbnail.isNull() &&
		72	(GwenviewConfig::lowResourceUsageMode() \|\| qMax(thumbnail.width(), thumbnail.height()) >= pixelSize)
		73	) {
		74	mImage = std::move(thumbnail);
		75	mOriginalWidth = content.size().width();
		76	mOriginalHeight = content.size().height();
		77	return true;
		78	}
		79	}
63		80
64	QByteArray formatHint = pixPath.section(QLatin1Char('.'), -1).toLocal8Bit().toLower();	81	QByteArray formatHint = pixPath.section(QLatin1Char('.'), -1).toLocal8Bit().toLower();
65	QImageReader reader(pixPath);	82	QImageReader reader(pixPath);
66		83
67	JpegContent content;	84	#ifdef KDCRAW_FOUND
68	QByteArray format;
69	QByteArray data;	85	QByteArray data;
70	QBuffer buffer;	86	QBuffer buffer;
71	int previewRatio = 1;
72
73	#ifdef KDCRAW_FOUND
74	// raw images deserve special treatment	87	// raw images deserve special treatment
75	if (KDcrawIface::KDcraw::rawFilesList().contains(QString::fromLatin1(formatHint))) {	88	if (KDcrawIface::KDcraw::rawFilesList().contains(QString::fromLatin1(formatHint))) {
76	// use KDCraw to extract the preview	89	// use KDCraw to extract the preview
77	bool ret = KDcrawIface::KDcraw::loadEmbeddedPreview(data, pixPath);	90	bool ret = KDcrawIface::KDcraw::loadEmbeddedPreview(data, pixPath);
78		91
79	// We need QImage. Loading JpegContent from QImage - exif lost
80	// Loading QImage from JpegContent - unimplemented, would go with loadFromData
81	if (!ret) {	92	if (!ret) {
82	// if the embedded preview loading failed, load half preview instead. That's slower...	93	// if the embedded preview loading failed, load half preview instead. That's slower...
83	if (!KDcrawIface::KDcraw::loadHalfPreview(data, pixPath)) {	94	if (!KDcrawIface::KDcraw::loadHalfPreview(data, pixPath)) {
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87	previewRatio = 2;	98	previewRatio = 2;
88	}	99	}
89		100
90	// And we need JpegContent too because of EXIF (orientation!).
91	if (!content.loadFromData(data)) {
92	qWarning() << "unable to load preview for " << pixPath.toUtf8().constData();
93	return false;
94	}
95
96	buffer.setBuffer(&data);	101	buffer.setBuffer(&data);
97	buffer.open(QIODevice::ReadOnly);	102	buffer.open(QIODevice::ReadOnly);
98	reader.setDevice(&buffer);	103	reader.setDevice(&buffer);
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106	// Set filename again, otherwise QImageReader won't restart from scratch	111	// Set filename again, otherwise QImageReader won't restart from scratch
107	reader.setFileName(pixPath);	112	reader.setFileName(pixPath);
108	}	113	}
109
110	if (reader.format() == "jpeg" && GwenviewConfig::applyExifOrientation()) {
111	content.load(pixPath);
112	}
113	}
114
115	// If there's jpeg content (from jpg or raw files), try to load an embedded thumbnail, if available.
116	if (!content.rawData().isEmpty()) {
117	QImage thumbnail = content.thumbnail();
118
119	// If the user does not care about the generated thumbnails (by deleting them on exit), use ANY
120	// embedded thumnail, even if it's too small.
121	if (!thumbnail.isNull() &&
122	(GwenviewConfig::lowResourceUsageMode() \|\| qMax(thumbnail.width(), thumbnail.height()) >= pixelSize)
123	) {
124	mImage = std::move(thumbnail);
125	mOriginalWidth = content.size().width();
126	mOriginalHeight = content.size().height();
127	return true;
128	}
129	}	114	}
130		115
131	// Generate thumbnail from full image	116	// Generate thumbnail from full image
132	originalSize = reader.size();	117	QSize originalSize = reader.size();
133	if (originalSize.isValid() && reader.supportsOption(QImageIOHandler::ScaledSize)	118	if (originalSize.isValid() && reader.supportsOption(QImageIOHandler::ScaledSize)
134	&& qMax(originalSize.width(), originalSize.height()) >= pixelSize)	119	&& qMax(originalSize.width(), originalSize.height()) >= pixelSize)
135	{	120	{
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146	}	131	}
147		132
148	// format() is empty after QImageReader::read() is called	133	// format() is empty after QImageReader::read() is called
149	format = reader.format();	134	QByteArray format = reader.format();
		135	QImage originalImage;
150	if (!reader.read(&originalImage)) {	136	if (!reader.read(&originalImage)) {
151	return false;	137	return false;
152	}	138	}
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