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LibGfx/JPEGXL: Put frame's image inside the Frame struct

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The image was previously managed as an output parameter of the
`read_frame` function. This reorganisation also brings us closer to the
spec. As it is specified that each frame have its own image that will
later on compose a greater bitmap.
This commit is contained in:
Lucas CHOLLET 2023-08-11 12:43:57 -04:00 committed by Andreas Kling
parent 70e4d3a9b6
commit 49c55447d9
Notes: sideshowbarker 2024-07-17 23:07:41 +09:00 
Author: https://github.com/LucasChollet
Commit: https://github.com/SerenityOS/serenity/commit/49c55447d9
Pull-request: https://github.com/SerenityOS/serenity/pull/20505
1 changed files with 18 additions and 19 deletions
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37
Userland/Libraries/LibGfx/ImageFormats/JPEGXLLoader.cpp
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@ -2310,10 +2310,11 @@ struct Frame {
u64 num_groups {};
u64 num_lf_groups {};
Image image {};
};
static ErrorOr<Frame> read_frame(LittleEndianInputBitStream& stream,
Image& image,
SizeHeader const& size_header,
ImageMetadata const& metadata,
Optional<EntropyDecoder>& entropy_decoder)
@ -2352,12 +2353,12 @@ static ErrorOr<Frame> read_frame(LittleEndianInputBitStream& stream,
frame.toc = TRY(read_toc(stream, frame.frame_header, frame.num_groups, frame.num_lf_groups));
image = TRY(Image::create({ frame.width, frame.height }, metadata));
frame.image = TRY(Image::create({ frame.width, frame.height }, metadata));
frame.lf_global = TRY(read_lf_global(stream, image, frame.frame_header, metadata, entropy_decoder));
frame.lf_global = TRY(read_lf_global(stream, frame.image, frame.frame_header, metadata, entropy_decoder));
for (u32 i {}; i < frame.num_lf_groups; ++i)
TRY(read_lf_group(stream, image, frame.frame_header));
TRY(read_lf_group(stream, frame.image, frame.frame_header));
if (frame.frame_header.encoding == FrameHeader::Encoding::kVarDCT) {
TODO();
@ -2366,13 +2367,13 @@ static ErrorOr<Frame> read_frame(LittleEndianInputBitStream& stream,
auto const num_pass_group = frame.num_groups * frame.frame_header.passes.num_passes;
auto const& transform_infos = frame.lf_global.gmodular.modular_header.transform;
for (u64 i {}; i < num_pass_group; ++i)
TRY(read_pass_group(stream, image, frame.frame_header, group_dim));
TRY(read_pass_group(stream, frame.image, frame.frame_header, group_dim));
// G.4.2 - Modular group data
// When all modular groups are decoded, the inverse transforms are applied to
// the at that point fully decoded GlobalModular image, as specified in H.6.
for (auto const& transformation : transform_infos.in_reverse())
apply_transformation(image, transformation);
apply_transformation(frame.image, transformation);
return frame;
}
@ -2391,7 +2392,7 @@ static u32 mirror_1d(i32 coord, u32 size)
///
/// K - Image features
static ErrorOr<void> apply_upsampling(Image& image, ImageMetadata const& metadata, Frame const& frame)
static ErrorOr<void> apply_upsampling(Frame& frame, ImageMetadata const& metadata)
{
Optional<u32> ec_max;
for (auto upsampling : frame.frame_header.ec_upsampling) {
@ -2414,7 +2415,7 @@ static ErrorOr<void> apply_upsampling(Image& image, ImageMetadata const& metadat
};
// FIXME: Use ec_upsampling for extra-channels
for (auto& channel : image.channels()) {
for (auto& channel : frame.image.channels()) {
auto upsampled = TRY(Channel::create(k * channel.width(), k * channel.height()));
// Loop over the original image
@ -2464,9 +2465,9 @@ static ErrorOr<void> apply_upsampling(Image& image, ImageMetadata const& metadat
return {};
}
static ErrorOr<void> apply_image_features(Image& image, ImageMetadata const& metadata, Frame const& frame)
static ErrorOr<void> apply_image_features(Frame& frame, ImageMetadata const& metadata)
{
TRY(apply_upsampling(image, metadata, frame));
TRY(apply_upsampling(frame, metadata));
if (frame.frame_header.flags != FrameHeader::Flags::None)
TODO();
@ -2497,10 +2498,10 @@ static void ycbcr_to_rgb(Image& image, u8 bits_per_sample)
}
}
static void apply_colour_transformation(Image& image, ImageMetadata const& metadata, Frame const& frame)
static void apply_colour_transformation(Frame& frame, ImageMetadata const& metadata)
{
if (frame.frame_header.do_YCbCr)
ycbcr_to_rgb(image, metadata.bit_depth.bits_per_sample);
ycbcr_to_rgb(frame.image, metadata.bit_depth.bits_per_sample);
if (metadata.xyb_encoded) {
TODO();
@ -2548,20 +2549,18 @@ public:
ErrorOr<void> decode_frame()
{
Image image {};
auto const frame = TRY(read_frame(m_stream, image, m_header, m_metadata, m_entropy_decoder));
auto frame = TRY(read_frame(m_stream, m_header, m_metadata, m_entropy_decoder));
if (frame.frame_header.restoration_filter.gab || frame.frame_header.restoration_filter.epf_iters != 0)
TODO();
TRY(apply_image_features(image, m_metadata, frame));
TRY(apply_image_features(frame, m_metadata));
apply_colour_transformation(image, m_metadata, frame);
apply_colour_transformation(frame, m_metadata);
TRY(render_extra_channels(image, m_metadata));
TRY(render_extra_channels(frame.image, m_metadata));
m_bitmap = TRY(image.to_bitmap(m_metadata));
m_bitmap = TRY(frame.image.to_bitmap(m_metadata));
return {};
}