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39 | |
40 | #include <sharedimageprovider.h> |
41 | #include <qsharedimageloader_p.h> |
42 | #include <private/qquickpixmapcache_p.h> |
43 | #include <private/qimage_p.h> |
44 | #include <QImageReader> |
45 | #include <QFileInfo> |
46 | #include <QDir> |
47 | |
48 | Q_DECLARE_METATYPE(QQuickImageProviderOptions) |
49 | |
50 | class QuickSharedImageLoader : public QSharedImageLoader |
51 | { |
52 | Q_OBJECT |
53 | friend class SharedImageProvider; |
54 | |
55 | public: |
56 | enum ImageParameter { |
57 | OriginalSize = 0, |
58 | RequestedSize, |
59 | ProviderOptions, |
60 | NumImageParameters |
61 | }; |
62 | |
63 | QuickSharedImageLoader(QObject *parent = nullptr) |
64 | : QSharedImageLoader(parent) |
65 | { |
66 | } |
67 | |
68 | protected: |
69 | QImage loadFile(const QString &path, ImageParameters *params) override |
70 | { |
71 | QImageReader imgio(path); |
72 | QSize realSize = imgio.size(); |
73 | QSize requestSize; |
74 | QQuickImageProviderOptions options; |
75 | if (params) { |
76 | requestSize = params->value(i: RequestedSize).toSize(); |
77 | options = params->value(i: ProviderOptions).value<QQuickImageProviderOptions>(); |
78 | } |
79 | |
80 | QSize scSize = QQuickImageProviderWithOptions::loadSize(originalSize: imgio.size(), requestedSize: requestSize, format: imgio.format(), options); |
81 | |
82 | if (scSize.isValid()) |
83 | imgio.setScaledSize(scSize); |
84 | |
85 | QImage image; |
86 | if (imgio.read(image: &image)) { |
87 | if (realSize.isEmpty()) |
88 | realSize = image.size(); |
89 | // Make sure we have acceptable format for texture uploader, or it will convert & lose sharing |
90 | // This mimics the testing & conversion normally done by the quick pixmapcache & texturefactory |
91 | if (image.format() != QImage::Format_RGB32 && image.format() != QImage::Format_ARGB32_Premultiplied) { |
92 | QImage::Format newFmt = QImage::Format_RGB32; |
93 | if (image.hasAlphaChannel() && image.data_ptr()->checkForAlphaPixels()) |
94 | newFmt = QImage::Format_ARGB32_Premultiplied; |
95 | qCDebug(lcSharedImage) << "Convert on load from format" << image.format() << "to" << newFmt; |
96 | image = image.convertToFormat(f: newFmt); |
97 | } |
98 | } |
99 | |
100 | if (params && params->count() > OriginalSize) |
101 | params->replace(i: OriginalSize, t: realSize); |
102 | |
103 | return image; |
104 | } |
105 | |
106 | QString key(const QString &path, ImageParameters *params) override |
107 | { |
108 | QSize reqSz; |
109 | QQuickImageProviderOptions opts; |
110 | if (params) { |
111 | reqSz = params->value(i: RequestedSize).toSize(); |
112 | opts = params->value(i: ProviderOptions).value<QQuickImageProviderOptions>(); |
113 | } |
114 | if (!reqSz.isValid()) |
115 | return path; |
116 | int aspect = opts.preserveAspectRatioCrop() || opts.preserveAspectRatioFit() ? 1 : 0; |
117 | |
118 | QString key = path + QStringLiteral("_%1x%2_%3" ).arg(a: reqSz.width()).arg(a: reqSz.height()).arg(a: aspect); |
119 | qCDebug(lcSharedImage) << "KEY:" << key; |
120 | return key; |
121 | } |
122 | }; |
123 | |
124 | |
125 | SharedImageProvider::SharedImageProvider() |
126 | : QQuickImageProviderWithOptions(QQuickImageProvider::Image), loader(new QuickSharedImageLoader) |
127 | { |
128 | } |
129 | |
130 | QImage SharedImageProvider::requestImage(const QString &id, QSize *size, const QSize &requestedSize, const QQuickImageProviderOptions &options) |
131 | { |
132 | QFileInfo fi(QDir::root(), id); |
133 | QString path = fi.canonicalFilePath(); |
134 | if (path.isEmpty()) |
135 | return QImage(); |
136 | |
137 | QSharedImageLoader::ImageParameters params(QuickSharedImageLoader::NumImageParameters); |
138 | params[QuickSharedImageLoader::RequestedSize].setValue(requestedSize); |
139 | params[QuickSharedImageLoader::ProviderOptions].setValue(options); |
140 | |
141 | QImage img = loader->load(path, params: ¶ms); |
142 | if (img.isNull()) { |
143 | // May be sharing problem, fall back to normal local load |
144 | img = loader->loadFile(path, params: ¶ms); |
145 | if (!img.isNull()) |
146 | qCWarning(lcSharedImage) << "Sharing problem; loading" << id << "unshared" ; |
147 | } |
148 | |
149 | //... QSize realSize = params.value(QSharedImageLoader::OriginalSize).toSize(); |
150 | // quickpixmapcache's readImage() reports back the original size, prior to requestedSize scaling, in the *size |
151 | // parameter. That value is currently ignored by quick however, which only cares about the present size of the |
152 | // returned image. So handling and sharing of info on pre-scaled size is currently not implemented. |
153 | if (size) { |
154 | *size = img.size(); |
155 | } |
156 | |
157 | return img; |
158 | } |
159 | |
160 | #include "sharedimageprovider.moc" |
161 | |