mirror/kimageformats
1
0
Fork 0
mirror of https://invent.kde.org/frameworks/kimageformats.git synced 2026-06-23 14:49:12 -04:00
Code Issues Packages Projects Releases Wiki Activity

IFF: DEEP image support

Browse Source
This commit is contained in:
Mirco Miranda
2026-05-06 15:12:14 +02:00
committed by Mirco Miranda
parent 1206598337
commit 49a8fd38c8
7 changed files with 867 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

67
src/imageformats/iff.cpp
View File

@@ -607,6 +607,69 @@ bool IFFHandler::readRGFXImage(QImage *image)
return true;
}
bool IFFHandler::readDEEPImage(QImage *image)
{
auto forms = d->searchForms<FORMChunk>();
if (forms.isEmpty()) {
return false;
}
auto cin = qBound(0, currentImageNumber(), int(forms.size() - 1));
auto &&form = forms.at(cin);
// show the first one (I don't have a sample with many images)
auto headers = IFFChunk::searchT<DGBLChunk>(form);
if (headers.isEmpty()) {
return false;
}
// create the image
auto &&header = headers.first();
auto size = header->size();
auto locs = IFFChunk::searchT<DLOCChunk>(form);
if (!locs.isEmpty()) {
size = locs.first()->size();
}
auto img = imageAlloc(size, form->format());
if (img.isNull()) {
qCWarning(LOG_IFFPLUGIN) << "IFFHandler::readDEEPImage(): error while allocating the image";
return false;
}
// decoding the image
auto bodies = IFFChunk::searchT<DBODChunk>(form);
if (bodies.isEmpty()) {
img.fill(0);
} else {
auto &&body = bodies.first();
if (!body->resetStrideRead(device())) {
qCWarning(LOG_IFFPLUGIN) << "IFFHandler::readDEEPImage(): error while reading image data";
return false;
}
auto pels = IFFChunk::searchT<DPELChunk>(form);
if (pels.isEmpty()) {
// DPEL is used to calculate the image format, so here should not be empty.
return false;
}
auto tvdcs = IFFChunk::searchT<TVDCChunk>(form);
for (auto y = 0, h = img.height(); y < h; ++y) {
auto line = reinterpret_cast<char*>(img.scanLine(y));
auto ba = body->strideRead(device(), y, header, pels.first(),
locs.isEmpty() ? nullptr : locs.first(),
tvdcs.isEmpty() ? nullptr : tvdcs.first());
if (ba.isEmpty()) {
qCWarning(LOG_IFFPLUGIN) << "IFFHandler::readDEEPImage(): error while reading image scanline";
return false;
}
memcpy(line, ba.constData(), std::min(img.bytesPerLine(), ba.size()));
}
}
// set metadata (including image resolution)
addMetadata(img, form);
*image = img;
return true;
}
bool IFFHandler::read(QImage *image)
{
if (!d->readStructure(device())) {
@@ -630,6 +693,10 @@ bool IFFHandler::read(QImage *image)
return true;
}
if (readDEEPImage(image)) {
return true;
}
qCWarning(LOG_IFFPLUGIN) << "IFFHandler::read(): no supported image found";
return false;
}