GerbilSoft/rom-properties
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[librptexture] ICO: Remove pIconHeader.

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Use dir.bestIcon_idx as an index into d->iconBitmapHeaders[] instead.
This commit is contained in:
David Korth 2025-06-13 18:13:16 -04:00
parent da852e5d50
commit 1da1c39c18
1 changed files with 11 additions and 8 deletions
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19
src/librptexture/fileformat/ICO.cpp
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@ -161,9 +161,6 @@ public:
// NOTE: *Not* byteswapped.
rp::uvector<IconBitmapHeader_t> iconBitmapHeaders;
// "Best" icon: Bitmap header
const IconBitmapHeader_t *pIconHeader;
// Decoded image
rp_image_ptr img;
@ -242,7 +239,6 @@ const TextureInfo ICOPrivate::textureInfo = {
ICOPrivate::ICOPrivate(ICO *q, const IRpFilePtr &file)
: super(q, file, &textureInfo)
, iconType(IconType::Unknown)
, pIconHeader(nullptr)
{
// Clear the ICO header union.
memset(&icoHeader, 0, sizeof(icoHeader));
@ -254,7 +250,6 @@ ICOPrivate::ICOPrivate(ICO *q, const IRpFilePtr &file)
ICOPrivate::ICOPrivate(ICO *q, const IResourceReaderPtr &resReader, uint16_t type, int id, int lang)
: super(q, resReader, &textureInfo)
, iconType(IconType::Unknown)
, pIconHeader(nullptr)
{
// Clear the ICO header union.
memset(&icoHeader, 0, sizeof(icoHeader));
@ -470,7 +465,6 @@ int ICOPrivate::loadIconDirectory_Win3(void)
if (icon_is_better) {
// This icon is better.
bestIcon_idx = static_cast<int>(i);
pIconHeader = p;
width_best = width;
height_best = height;
bitcount_best = bitcount;
@ -552,6 +546,15 @@ rp_image_const_ptr ICOPrivate::loadImage_Win3(int idx)
// TODO: Verify dwBytesInRes.
// Check the header size.
if (idx < 0) {
idx = dir.bestIcon_idx;
}
if (idx < 0 || idx >= static_cast<int>(iconBitmapHeaders.size())) {
// Index is out of range.
return {};
}
const IconBitmapHeader_t *const pIconHeader = &iconBitmapHeaders[idx];
const unsigned int header_size = le32_to_cpu(pIconHeader->size);
switch (header_size) {
default:
@ -1157,7 +1160,7 @@ void ICO::init(bool res)
case ICOPrivate::IconType::Cursor_Win3:
case ICOPrivate::IconType::IconRes_Win3:
case ICOPrivate::IconType::CursorRes_Win3:
if (d->dir.bestIcon_idx < 0) {
if (d->dir.bestIcon_idx < 0 || d->dir.bestIcon_idx >= static_cast<int>(d->iconBitmapHeaders.size())) {
// No "best" icon...
d->file.reset();
if (res) {
@ -1167,7 +1170,7 @@ void ICO::init(bool res)
return;
}
const ICOPrivate::IconBitmapHeader_t *const pIconHeader = d->pIconHeader;
const ICOPrivate::IconBitmapHeader_t *const pIconHeader = &d->iconBitmapHeaders[d->dir.bestIcon_idx];
switch (pIconHeader->size) {
default:
// Not supported...