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[librptexture] ICOPrivate::loadImage_Win3(): Add support for 32-bit ARGB icons.

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NOTE: BI_BITFIELDS is not supported right now. (Is that even used for
32-bit ARGB, or is it for 16/24 only?)

Fix mask handling for 48x48 icons by aligning stride to 32-bit.
This commit is contained in:
David Korth 2025-06-07 20:52:45 -04:00
parent 7edb6df2e4
commit fe85d93fc3
1 changed files with 20 additions and 1 deletions
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21
src/librptexture/fileformat/ICO.cpp
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@ -370,12 +370,27 @@ rp_image_const_ptr ICOPrivate::loadImage_Win3(void)
return {};
case 4:
// 16-color
img = ImageDecoder::fromLinearCI4(ImageDecoder::PixelFormat::Host_ARGB32, true,
width, half_height,
icon_data, icon_size,
pal_data.data(), pal_data.size() * sizeof(uint32_t),
stride);
break;
case 32: {
// 32-bit ARGB
const uint32_t biCompression = le32_to_cpu(header.bih.biCompression);
if (biCompression != BI_RGB) {
// FIXME: BI_BITFIELDS is not supported right now.
return {};
}
img = ImageDecoder::fromLinear32(ImageDecoder::PixelFormat::ARGB8888,
width, half_height,
reinterpret_cast<const uint32_t*>(icon_data), icon_size,
stride);
break;
}
}
// Apply the icon mask.
@ -390,6 +405,7 @@ rp_image_const_ptr ICOPrivate::loadImage_Win3(void)
uint8_t *bits = static_cast<uint8_t*>(img->bits());
const uint8_t *mask = mask_data;
int dest_stride_adj = img->stride() - width;
int mask_stride_adj = mask_stride - ((width / 8) + (width % 8 > 0));
for (unsigned int y = half_height; y > 0; y--) {
// TODO: Mask stride adjustment?
unsigned int mask_bits_remain = 8;
@ -412,6 +428,7 @@ rp_image_const_ptr ICOPrivate::loadImage_Win3(void)
// Next row.
bits += dest_stride_adj;
mask += mask_stride_adj;
}
} else {
// CI8 needs to be converted to ARGB32.
@ -436,7 +453,8 @@ rp_image_const_ptr ICOPrivate::loadImage_Win3(void)
uint32_t *bits = static_cast<uint32_t*>(img->bits());
const uint8_t *mask = mask_data;
int dest_stride_adj = img->stride() - width;
int dest_stride_adj = (img->stride() / sizeof(uint32_t)) - width;
int mask_stride_adj = mask_stride - ((width / 8) + (width % 8 > 0));
for (unsigned int y = half_height; y > 0; y--) {
// TODO: Mask stride adjustment?
unsigned int mask_bits_remain = 8;
@ -458,6 +476,7 @@ rp_image_const_ptr ICOPrivate::loadImage_Win3(void)
// Next row.
bits += dest_stride_adj;
mask += mask_stride_adj;
}
}