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LibGfx/JBIG2: Add some debug logging to decode_page_information()
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sideshowbarker
2024-07-17 16:23:55 +09:00
Author: https://github.com/nico Commit: https://github.com/SerenityOS/serenity/commit/7035c2a2ff Pull-request: https://github.com/SerenityOS/serenity/pull/23695
@ -1933,10 +1933,13 @@ static ErrorOr<void> decode_page_information(JBIG2LoadingContext& context, Segme
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if (page_information.bitmap_height == 0xffff'ffff && !page_is_striped)
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return Error::from_string_literal("JBIG2ImageDecoderPlugin: Non-striped bitmaps of indeterminate height not allowed");
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u16 maximum_stripe_height = page_information.striping_information & 0x7F;
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u8 default_color = (page_information.flags >> 2) & 1;
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u8 default_combination_operator = (page_information.flags >> 3) & 3;
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context.page.default_combination_operator = static_cast<CombinationOperator>(default_combination_operator);
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dbgln_if(JBIG2_DEBUG, "Page information: width={}, height={}, is_striped={}, max_stripe_height={}, default_color={}, default_combination_operator={}", page_information.bitmap_width, page_information.bitmap_height, page_is_striped, maximum_stripe_height, default_color, default_combination_operator);
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// FIXME: Do something with the other fields in page_information.
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// "2) Create the page buffer, of the size given in the page information segment.
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@ -1946,7 +1949,7 @@ static ErrorOr<void> decode_page_information(JBIG2LoadingContext& context, Segme
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// equal to this maximum stripe height."
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size_t height = page_information.bitmap_height;
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if (height == 0xffff'ffff)
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height = page_information.striping_information & 0x7F;
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height = maximum_stripe_height;
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context.page.bits = TRY(BitBuffer::create(page_information.bitmap_width, height));
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// "3) Fill the page buffer with the page's default pixel value."
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