void ImageDocument::setContents(const ImageContents &contents)
{
Q_D(ImageDocument);
if (contents.isNull()) {
clear();
return;
}
const auto header = contents.header();
d->type = header.type();
d->size = header.size();
d->imageFormat = header.imageFormat();
d->imageCount = header.imageCount();
d->mipmapCount = header.mipmapCount();
d->frameDelay = header.frameDelay();
d->loopCount = header.loopCount();
for (int index = 0; index < d->imageCount; ++index) {
for (int level = 0; level < d->mipmapCount; ++level) {
auto image = contents.image(index, level);
std::unique_ptr<ImageDocumentItem> item(new ImageDocumentItem(this));
item->setSize(image.size());
item->setImage(image);
d->items[ImageDocumentPrivate::ImageIndex(index, level)] = std::move(item);
}
}
emit contentsChanged();
}
int main(int argc, char *argv[])
{
ImageIO reader("image.png");
auto result = reader.read();
ImageIOResult ok = result.first;
if (!ok) {
qWarning() << "Error reading image:" << ok.toString();
return 1;
}
ImageContents contents = result.second;
handleImage(contents.image());
return 0;
}
bool DefaultHandler::write(const ImageContents &contents, const WriteOptions &options)
{
Q_UNUSED(options);
QImageWriter writer(device(), mimeTypeToFormat(mimeType()));
const bool ok = writer.write(contents.image());
if (!ok)
return false;
return true;
}
bool DefaultHandler::read(ImageContents &contents, const ReadOptions &options)
{
Q_UNUSED(options);
QImageReader reader(device(), mimeTypeToFormat(mimeType()));
int count = reader.imageCount();
if (reader.supportsOption(QImageIOHandler::Animation)) {
contents.setImageCount(count);
for (int i = 0; i < count; i++) {
QImage image;
const bool ok = reader.read(&image);
if (!ok)
return false;
contents.setImage(image, i);
}
} else if (count > 0) {
contents.setMipmapCount(count);
for (int i = 0; i < count; i++) {
QImage image;
reader.jumpToImage(i);
const bool ok = reader.read(&image);
if (!ok)
return false;
contents.setImage(image, 0, i);
}
} else {
QImage image;
const bool ok = reader.read(&image);
if (!ok)
return false;
contents.setImage(image);
}
return true;
}