From 4a95e55fb3a9225ebc1134f14c09c8f1c1fa8953 Mon Sep 17 00:00:00 2001
From: Nico Weber <thakis@chromium.org>
Date: Fri, 22 Mar 2024 15:21:51 -0400
Subject: [PATCH] LibGfx/ISOBMFF: Add JPEG2000CaptureResolutionBox

---
 .../ImageFormats/ISOBMFF/JPEG2000Boxes.cpp    | 22 ++++++++++++++++++-
 .../ImageFormats/ISOBMFF/JPEG2000Boxes.h      | 12 ++++++++++
 2 files changed, 33 insertions(+), 1 deletion(-)

diff --git a/Userland/Libraries/LibGfx/ImageFormats/ISOBMFF/JPEG2000Boxes.cpp b/Userland/Libraries/LibGfx/ImageFormats/ISOBMFF/JPEG2000Boxes.cpp
index 49bb2700fdb..5bd95032726 100644
--- a/Userland/Libraries/LibGfx/ImageFormats/ISOBMFF/JPEG2000Boxes.cpp
+++ b/Userland/Libraries/LibGfx/ImageFormats/ISOBMFF/JPEG2000Boxes.cpp
@@ -91,8 +91,10 @@ void JPEG2000ColorSpecificationBox::dump(String const& prepend) const
 
 ErrorOr<void> JPEG2000ResolutionBox::read_from_stream(BoxStream& stream)
 {
-    auto make_subbox = [](BoxType type, BoxStream&) -> ErrorOr<Optional<NonnullOwnPtr<Box>>> {
+    auto make_subbox = [](BoxType type, BoxStream& stream) -> ErrorOr<Optional<NonnullOwnPtr<Box>>> {
         switch (type) {
+        case BoxType::JPEG2000CaptureResolutionBox:
+            return TRY(JPEG2000CaptureResolutionBox::create_from_stream(stream));
         default:
             return OptionalNone {};
         }
@@ -107,6 +109,24 @@ void JPEG2000ResolutionBox::dump(String const& prepend) const
     SuperBox::dump(prepend);
 }
 
+ErrorOr<void> JPEG2000CaptureResolutionBox::read_from_stream(BoxStream& stream)
+{
+    vertical_capture_grid_resolution_numerator = TRY(stream.read_value<BigEndian<u16>>());
+    vertical_capture_grid_resolution_denominator = TRY(stream.read_value<BigEndian<u16>>());
+    horizontal_capture_grid_resolution_numerator = TRY(stream.read_value<BigEndian<u16>>());
+    horizontal_capture_grid_resolution_denominator = TRY(stream.read_value<BigEndian<u16>>());
+    vertical_capture_grid_resolution_exponent = TRY(stream.read_value<i8>());
+    horizontal_capture_grid_resolution_exponent = TRY(stream.read_value<i8>());
+    return {};
+}
+
+void JPEG2000CaptureResolutionBox::dump(String const& prepend) const
+{
+    Box::dump(prepend);
+    outln("{}- vertical_capture_grid_resolution = {}/{} * 10^{}", prepend, vertical_capture_grid_resolution_numerator, vertical_capture_grid_resolution_denominator, vertical_capture_grid_resolution_exponent);
+    outln("{}- horizontal_capture_grid_resolution = {}/{} * 10^{}", prepend, horizontal_capture_grid_resolution_numerator, horizontal_capture_grid_resolution_denominator, horizontal_capture_grid_resolution_exponent);
+}
+
 ErrorOr<void> JPEG2000SignatureBox::read_from_stream(BoxStream& stream)
 {
     signature = TRY(stream.read_value<BigEndian<u32>>());
diff --git a/Userland/Libraries/LibGfx/ImageFormats/ISOBMFF/JPEG2000Boxes.h b/Userland/Libraries/LibGfx/ImageFormats/ISOBMFF/JPEG2000Boxes.h
index f42aa58f5ab..9b1a56de506 100644
--- a/Userland/Libraries/LibGfx/ImageFormats/ISOBMFF/JPEG2000Boxes.h
+++ b/Userland/Libraries/LibGfx/ImageFormats/ISOBMFF/JPEG2000Boxes.h
@@ -43,6 +43,18 @@ struct JPEG2000ResolutionBox final : public SuperBox {
     BOX_SUBTYPE(JPEG2000ResolutionBox);
 };
 
+// I.5.3.7.1 Capture Resolution box
+struct JPEG2000CaptureResolutionBox final : public Box {
+    BOX_SUBTYPE(JPEG2000CaptureResolutionBox);
+
+    u16 vertical_capture_grid_resolution_numerator { 0 };
+    u16 vertical_capture_grid_resolution_denominator { 0 };
+    u16 horizontal_capture_grid_resolution_numerator { 0 };
+    u16 horizontal_capture_grid_resolution_denominator { 0 };
+    i8 vertical_capture_grid_resolution_exponent { 0 };
+    i8 horizontal_capture_grid_resolution_exponent { 0 };
+};
+
 struct JPEG2000SignatureBox final : public Box {
     BOX_SUBTYPE(JPEG2000SignatureBox);