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: add uncompressed RGFX support

Browse Source
This commit is contained in:
Mirco Miranda
2026-01-27 11:52:15 +01:00
parent 32773e5f0c
commit e0f1ba640a
22 changed files with 849 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

72
src/imageformats/iff.cpp
View File

@@ -267,6 +267,11 @@ static void addMetadata(QImage &img, const IFOR_Chunk *form)
if (!params.isEmpty()) {
img.setDotsPerMeterY(img.dotsPerMeterY() * params.first()->aspectRatio());
}
} else if (form->formType() == RGFX_FORM_TYPE) {
auto headers = IFFChunk::searchT<RGHDChunk>(form);
if (!headers.isEmpty()) {
img.setDotsPerMeterY(img.dotsPerMeterY() * headers.first()->aspectRatio());
}
} else {
auto headers = IFFChunk::searchT<BMHDChunk>(form);
if (!headers.isEmpty()) {
@@ -543,6 +548,69 @@ bool IFFHandler::readCDIImage(QImage *image)
return true;
}
bool IFFHandler::readRGFXImage(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<RGHDChunk>(form);
if (headers.isEmpty()) {
return false;
}
// create the image
auto &&header = headers.first();
auto img = imageAlloc(header->size(), form->format());
if (img.isNull()) {
qCWarning(LOG_IFFPLUGIN) << "IFFHandler::readRGFXImage(): error while allocating the image";
return false;
}
// set the palette
if (img.format() == QImage::Format_Indexed8) {
auto pltes = IFFChunk::searchT<RCOLChunk>(form);
if (!pltes.isEmpty()) {
img.setColorTable(pltes.first()->palette());
}
}
// decoding the image
auto bodies = IFFChunk::searchT<RBODChunk>(form);
if (bodies.isEmpty()) {
img.fill(0);
} else {
auto &&body = bodies.first();
if (!body->resetStrideRead(device())) {
qCWarning(LOG_IFFPLUGIN) << "IFFHandler::readRGFXImage(): error while reading image data";
return false;
}
auto rcsms = IFFChunk::searchT<RSCMChunk>(form);
auto rcols = IFFChunk::searchT<RCOLChunk>(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,
rcsms.isEmpty() ? nullptr : rcsms.first(),
rcols.isEmpty() ? nullptr : rcols.first());
if (ba.isEmpty()) {
qCWarning(LOG_IFFPLUGIN) << "IFFHandler::readRGFXImage(): 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())) {
@@ -562,6 +630,10 @@ bool IFFHandler::read(QImage *image)
return true;
}
if (readRGFXImage(image)) {
return true;
}
qCWarning(LOG_IFFPLUGIN) << "IFFHandler::read(): no supported image found";
return false;
}