LibGfx+LibWeb: Remove TIFF image decoding

This is no longer widely supported by other engines.
This commit is contained in:
Tim Ledbetter 2026-06-12 13:13:23 +01:00 committed by Andreas Kling
parent 6224045e5f
commit 3cddcc8461
34 changed files with 0 additions and 1863 deletions

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/*
* Copyright (c) 2023, Lucas Chollet <lucas.chollet@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Array.h>
#include <AK/BitStream.h>
#include <AK/MemoryStream.h>
#include <LibGfx/Color.h>
#include <LibGfx/ImageFormats/CCITTDecoder.h>
namespace Gfx::CCITT {
namespace {
struct Code {
u16 run_length {};
u8 code_length {};
u16 code {};
};
// Table 2/T.4 Terminating codes
constexpr Array white_terminating_codes = {
Code { 0, 8, 0b00110101 },
Code { 1, 6, 0b000111 },
Code { 2, 4, 0b0111 },
Code { 3, 4, 0b1000 },
Code { 4, 4, 0b1011 },
Code { 5, 4, 0b1100 },
Code { 6, 4, 0b1110 },
Code { 7, 4, 0b1111 },
Code { 8, 5, 0b10011 },
Code { 9, 5, 0b10100 },
Code { 10, 5, 0b00111 },
Code { 11, 5, 0b01000 },
Code { 12, 6, 0b001000 },
Code { 13, 6, 0b000011 },
Code { 14, 6, 0b110100 },
Code { 15, 6, 0b110101 },
Code { 16, 6, 0b101010 },
Code { 17, 6, 0b101011 },
Code { 18, 7, 0b0100111 },
Code { 19, 7, 0b0001100 },
Code { 20, 7, 0b0001000 },
Code { 21, 7, 0b0010111 },
Code { 22, 7, 0b0000011 },
Code { 23, 7, 0b0000100 },
Code { 24, 7, 0b0101000 },
Code { 25, 7, 0b0101011 },
Code { 26, 7, 0b0010011 },
Code { 27, 7, 0b0100100 },
Code { 28, 7, 0b0011000 },
Code { 29, 8, 0b00000010 },
Code { 30, 8, 0b00000011 },
Code { 31, 8, 0b00011010 },
Code { 32, 8, 0b00011011 },
Code { 33, 8, 0b00010010 },
Code { 34, 8, 0b00010011 },
Code { 35, 8, 0b00010100 },
Code { 36, 8, 0b00010101 },
Code { 37, 8, 0b00010110 },
Code { 38, 8, 0b00010111 },
Code { 39, 8, 0b00101000 },
Code { 40, 8, 0b00101001 },
Code { 41, 8, 0b00101010 },
Code { 42, 8, 0b00101011 },
Code { 43, 8, 0b00101100 },
Code { 44, 8, 0b00101101 },
Code { 45, 8, 0b00000100 },
Code { 46, 8, 0b00000101 },
Code { 47, 8, 0b00001010 },
Code { 48, 8, 0b00001011 },
Code { 49, 8, 0b01010010 },
Code { 50, 8, 0b01010011 },
Code { 51, 8, 0b01010100 },
Code { 52, 8, 0b01010101 },
Code { 53, 8, 0b00100100 },
Code { 54, 8, 0b00100101 },
Code { 55, 8, 0b01011000 },
Code { 56, 8, 0b01011001 },
Code { 57, 8, 0b01011010 },
Code { 58, 8, 0b01011011 },
Code { 59, 8, 0b01001010 },
Code { 60, 8, 0b01001011 },
Code { 61, 8, 0b00110010 },
Code { 62, 8, 0b00110011 },
Code { 63, 8, 0b00110100 },
};
// Table 2/T.4 Terminating codes
constexpr Array black_terminating_codes = {
Code { 0, 10, 0b0000110111 },
Code { 1, 3, 0b010 },
Code { 2, 2, 0b11 },
Code { 3, 2, 0b10 },
Code { 4, 3, 0b011 },
Code { 5, 4, 0b0011 },
Code { 6, 4, 0b0010 },
Code { 7, 5, 0b00011 },
Code { 8, 6, 0b000101 },
Code { 9, 6, 0b000100 },
Code { 10, 7, 0b0000100 },
Code { 11, 7, 0b0000101 },
Code { 12, 7, 0b0000111 },
Code { 13, 8, 0b00000100 },
Code { 14, 8, 0b00000111 },
Code { 15, 9, 0b000011000 },
Code { 16, 10, 0b0000010111 },
Code { 17, 10, 0b0000011000 },
Code { 18, 10, 0b0000001000 },
Code { 19, 11, 0b00001100111 },
Code { 20, 11, 0b00001101000 },
Code { 21, 11, 0b00001101100 },
Code { 22, 11, 0b00000110111 },
Code { 23, 11, 0b00000101000 },
Code { 24, 11, 0b00000010111 },
Code { 25, 11, 0b00000011000 },
Code { 26, 12, 0b000011001010 },
Code { 27, 12, 0b000011001011 },
Code { 28, 12, 0b000011001100 },
Code { 29, 12, 0b000011001101 },
Code { 30, 12, 0b000001101000 },
Code { 31, 12, 0b000001101001 },
Code { 32, 12, 0b000001101010 },
Code { 33, 12, 0b000001101011 },
Code { 34, 12, 0b000011010010 },
Code { 35, 12, 0b000011010011 },
Code { 36, 12, 0b000011010100 },
Code { 37, 12, 0b000011010101 },
Code { 38, 12, 0b000011010110 },
Code { 39, 12, 0b000011010111 },
Code { 40, 12, 0b000001101100 },
Code { 41, 12, 0b000001101101 },
Code { 42, 12, 0b000011011010 },
Code { 43, 12, 0b000011011011 },
Code { 44, 12, 0b000001010100 },
Code { 45, 12, 0b000001010101 },
Code { 46, 12, 0b000001010110 },
Code { 47, 12, 0b000001010111 },
Code { 48, 12, 0b000001100100 },
Code { 49, 12, 0b000001100101 },
Code { 50, 12, 0b000001010010 },
Code { 51, 12, 0b000001010011 },
Code { 52, 12, 0b000000100100 },
Code { 53, 12, 0b000000110111 },
Code { 54, 12, 0b000000111000 },
Code { 55, 12, 0b000000100111 },
Code { 56, 12, 0b000000101000 },
Code { 57, 12, 0b000001011000 },
Code { 58, 12, 0b000001011001 },
Code { 59, 12, 0b000000101011 },
Code { 60, 12, 0b000000101100 },
Code { 61, 12, 0b000001011010 },
Code { 62, 12, 0b000001100110 },
Code { 63, 12, 0b000001100111 },
};
// Table 3a/T.4 Make-up codes
constexpr Array white_make_up_codes = {
Code { 64, 5, 0b11011 },
Code { 128, 5, 0b10010 },
Code { 192, 6, 0b010111 },
Code { 256, 7, 0b0110111 },
Code { 320, 8, 0b00110110 },
Code { 384, 8, 0b00110111 },
Code { 448, 8, 0b01100100 },
Code { 512, 8, 0b01100101 },
Code { 576, 8, 0b01101000 },
Code { 640, 8, 0b01100111 },
Code { 704, 9, 0b011001100 },
Code { 768, 9, 0b011001101 },
Code { 832, 9, 0b011010010 },
Code { 896, 9, 0b011010011 },
Code { 960, 9, 0b011010100 },
Code { 1024, 9, 0b011010101 },
Code { 1088, 9, 0b011010110 },
Code { 1152, 9, 0b011010111 },
Code { 1216, 9, 0b011011000 },
Code { 1280, 9, 0b011011001 },
Code { 1344, 9, 0b011011010 },
Code { 1408, 9, 0b011011011 },
Code { 1472, 9, 0b010011000 },
Code { 1536, 9, 0b010011001 },
Code { 1600, 9, 0b010011010 },
Code { 1664, 6, 0b011000 },
Code { 1728, 9, 0b010011011 },
Code { 0xE0L, 12, 0b000000000001 },
};
// Table 3a/T.4 Make-up codes
constexpr Array black_make_up_codes = {
Code { 64, 10, 0b0000001111 },
Code { 128, 12, 0b000011001000 },
Code { 192, 12, 0b000011001001 },
Code { 256, 12, 0b000001011011 },
Code { 320, 12, 0b000000110011 },
Code { 384, 12, 0b000000110100 },
Code { 448, 12, 0b000000110101 },
Code { 512, 13, 0b0000001101100 },
Code { 576, 13, 0b0000001101101 },
Code { 640, 13, 0b0000001001010 },
Code { 704, 13, 0b0000001001011 },
Code { 768, 13, 0b0000001001100 },
Code { 832, 13, 0b0000001001101 },
Code { 896, 13, 0b0000001110010 },
Code { 960, 13, 0b0000001110011 },
Code { 1024, 13, 0b0000001110100 },
Code { 1088, 13, 0b0000001110101 },
Code { 1152, 13, 0b0000001110110 },
Code { 1216, 13, 0b0000001110111 },
Code { 1280, 13, 0b0000001010010 },
Code { 1344, 13, 0b0000001010011 },
Code { 1408, 13, 0b0000001010100 },
Code { 1472, 13, 0b0000001010101 },
Code { 1536, 13, 0b0000001011010 },
Code { 1600, 13, 0b0000001011011 },
Code { 1664, 13, 0b0000001100100 },
Code { 1728, 13, 0b0000001100101 },
Code { 0xE0L, 11, 0b00000000000 },
};
// Table 3b/T.4 Make-up codes
constexpr Array common_make_up_codes = {
Code { 1792, 11, 0b00000001000 },
Code { 1856, 11, 0b00000001100 },
Code { 1920, 11, 0b00000001101 },
Code { 1984, 12, 0b000000010010 },
Code { 2048, 12, 0b000000010011 },
Code { 2112, 12, 0b000000010100 },
Code { 2176, 12, 0b000000010101 },
Code { 2240, 12, 0b000000010110 },
Code { 2304, 12, 0b000000010111 },
Code { 2368, 12, 0b000000011100 },
Code { 2432, 12, 0b000000011101 },
Code { 2496, 12, 0b000000011110 },
Code { 2560, 12, 0b000000011111 },
};
template<typename T, size_t Size>
Optional<T> get_code_from_table(Array<T, Size> const& array, u16 code_word, u8 code_size)
{
for (auto const& code : array) {
if (code.code_length == code_size && code.code == code_word)
return code;
}
return OptionalNone {};
}
Optional<Code> get_markup_code(Color color, u16 code_word, u8 code_size)
{
if (auto maybe_value = get_code_from_table(common_make_up_codes, code_word, code_size); maybe_value.has_value())
return maybe_value.value();
if (color == Color::NamedColor::White)
return get_code_from_table(white_make_up_codes, code_word, code_size);
return get_code_from_table(black_make_up_codes, code_word, code_size);
}
Optional<Code> get_terminal_code(Color color, u16 code_word, u8 code_size)
{
if (color == Color::NamedColor::White)
return get_code_from_table(white_terminating_codes, code_word, code_size);
return get_code_from_table(black_terminating_codes, code_word, code_size);
}
constexpr auto const ccitt_white = Color::NamedColor::White;
constexpr auto const ccitt_black = Color::NamedColor::Black;
Color invert(Color current_color)
{
return current_color == ccitt_white ? ccitt_black : ccitt_white;
}
struct Change {
Color color;
u32 column;
};
using ReferenceLine = Vector<Change>;
ErrorOr<u32> read_run_length(BigEndianInputBitStream& input_bit_stream, Optional<ReferenceLine&> reference_line, Color current_color, u32 image_width, u32 column)
{
u8 size {};
u16 potential_code {};
u32 run_length {};
while (size < 14) {
potential_code <<= 1;
potential_code |= TRY(input_bit_stream.read_bit());
size++;
if (auto const maybe_markup = get_markup_code(current_color, potential_code, size); maybe_markup.has_value()) {
run_length += maybe_markup->run_length;
// OK, let's reset the loop to read a terminal code now
size = 0;
potential_code = 0;
} else if (auto const maybe_terminal = get_terminal_code(current_color, potential_code, size); maybe_terminal.has_value()) {
run_length += maybe_terminal->run_length;
if (reference_line.has_value())
TRY(reference_line->try_append({ invert(current_color), column + run_length }));
break;
}
}
if (size == 14)
return Error::from_string_literal("TIFFImageDecoderPlugin: Invalid CCITT code");
if (column + run_length > image_width)
return Error::from_string_literal("TIFFImageDecoderPlugin: CCITT codes encode for more than a line");
return run_length;
}
ErrorOr<ReferenceLine> decode_single_ccitt3_1d_line(BigEndianInputBitStream& input_bit_stream, BigEndianOutputBitStream& decoded_bits, u32 image_width)
{
// This is only useful for the 2D decoder.
ReferenceLine reference_line;
// We always flip the color when entering the loop, so let's initialize the
// color with black to make the first marker actually be white.
Color current_color { ccitt_black };
u32 run_length = 0;
u32 column = 0;
while (column < image_width) {
if (run_length > 0) {
run_length--;
TRY(decoded_bits.write_bits(current_color == ccitt_white ? 0u : 1u, 1));
++column;
continue;
}
current_color = invert(current_color);
run_length += TRY(read_run_length(input_bit_stream, reference_line, current_color, image_width, column));
}
TRY(decoded_bits.align_to_byte_boundary());
return reference_line;
}
static ErrorOr<void> read_eol(BigEndianInputBitStream& bit_stream, Group3Options::UseFillBits use_fill_bits)
{
constexpr u16 EOL = 0b0000'0000'0001;
if (use_fill_bits == Group3Options::UseFillBits::Yes) {
// TIFF specification, description of the T4Options tag:
// "Fill bits have been added as necessary before EOL codes such that
// EOL always ends on a byte boundary, thus ensuring an EOL-sequence of 1 byte
// preceded by a zero nibble: xxxx-0000 0000-0001."
auto const to_skip = (12 + bit_stream.bits_until_next_byte_boundary()) % 8;
TRY(bit_stream.read_bits(to_skip));
}
auto const read = TRY(bit_stream.read_bits<u16>(12));
if (read != EOL)
return Error::from_string_literal("CCITTDecoder: Invalid EndOfLine code");
return {};
}
enum class Mode : u8 {
Pass,
Horizontal,
Vertical_0,
Vertical_R1,
Vertical_R2,
Vertical_R3,
Vertical_L1,
Vertical_L2,
Vertical_L3,
};
struct ModeCode {
u8 code_length {};
Mode mode {};
u8 code {};
};
// Table 4/T.4 Two-dimensional code table
constexpr Array node_codes = to_array<ModeCode>({
{ 4, Mode::Pass, 0b0001 },
{ 3, Mode::Horizontal, 0b001 },
{ 1, Mode::Vertical_0, 0b1 },
{ 3, Mode::Vertical_R1, 0b011 },
{ 6, Mode::Vertical_R2, 0b000011 },
{ 7, Mode::Vertical_R3, 0b0000011 },
{ 3, Mode::Vertical_L1, 0b010 },
{ 6, Mode::Vertical_L2, 0b000010 },
{ 7, Mode::Vertical_L3, 0b0000010 },
});
using InvalidResult = u8;
ErrorOr<Variant<ModeCode, InvalidResult>> read_mode(BigEndianInputBitStream& input_bit_stream)
{
u8 size {};
u8 potential_code {};
while (size < 7) {
potential_code <<= 1;
potential_code |= TRY(input_bit_stream.read_bit());
++size;
if (auto const maybe_mode = get_code_from_table(node_codes, potential_code, size); maybe_mode.has_value())
return *maybe_mode;
}
return Variant<ModeCode, InvalidResult>(InvalidResult { potential_code });
}
enum class Search : u8 {
B1,
B2,
};
struct CCITTStatus {
ReferenceLine current_line {};
bool has_reached_eol { false };
};
ErrorOr<CCITTStatus> decode_single_ccitt_2d_line(BigEndianInputBitStream& input_bit_stream, BigEndianOutputBitStream& decoded_bits, ReferenceLine&& reference_line, u32 image_width)
{
CCITTStatus status {};
Color current_color { ccitt_white };
u32 column {};
u32 remainder_from_pass_mode {};
auto const next_change_on_reference_line = [&]() -> ErrorOr<Change> {
// 4.2.1.3.1 Definition of changing picture elements
Optional<Change> next_change {}; // This is referred to as b1 in the spec.
u32 offset {};
while (!next_change.has_value()) {
if (reference_line.is_empty() || reference_line.size() <= offset)
return Error::from_string_literal("CCITTDecoder: Corrupted stream");
auto const change = reference_line[0 + offset];
// 4.2.1.3.4 Processing the first and last picture elements in a line
// "The first starting picture element a0 on each coding line is imaginarily set at a position just
// before the first picture element, and is regarded as a white picture element."
// To emulate this behavior we check for column == 0 here.
if (change.column <= column && column != 0) {
reference_line.take_first();
continue;
}
if (change.color != current_color || change.column == image_width)
next_change = change;
else
offset++;
}
return *next_change;
};
auto const encode_for = [&](Change change, i8 offset = 0) -> ErrorOr<void> {
auto const to_encode = remainder_from_pass_mode + change.column - column + offset;
for (u32 i {}; i < to_encode; ++i)
TRY(decoded_bits.write_bits(current_color == ccitt_white ? 0u : 1u, 1));
column = change.column + offset;
current_color = invert(current_color);
remainder_from_pass_mode = 0;
TRY(status.current_line.try_empend(current_color, column));
return {};
};
while (column < image_width) {
auto const maybe_mode = TRY(read_mode(input_bit_stream));
if (maybe_mode.has<InvalidResult>()) {
auto const partially_read_eol = maybe_mode.get<InvalidResult>();
if (partially_read_eol != 0)
return Error::from_string_literal("CCITTDecoder: Unable to find the correct mode");
auto const remaining_eol = TRY(input_bit_stream.read_bits(5));
if (remaining_eol != 1)
return Error::from_string_literal("CCITTDecoder: Unable to find the correct mode");
// We reached EOL
status.has_reached_eol = true;
break;
}
// Behavior are described here 4.2.1.3.2 Coding modes.
switch (maybe_mode.get<ModeCode>().mode) {
case Mode::Pass: {
auto const column_before = column;
// We search for b1.
auto change = TRY(next_change_on_reference_line());
current_color = change.color;
column = change.column;
// We search for b2, which is the same as searching for b1 after updating the state.
change = TRY(next_change_on_reference_line());
current_color = change.color;
column = change.column;
remainder_from_pass_mode += column - column_before;
break;
}
case Mode::Horizontal: {
// a0a1
auto run_length = TRY(read_run_length(input_bit_stream, OptionalNone {}, current_color, image_width, column));
TRY(encode_for({ invert(current_color), column + run_length }));
// a1a2
run_length = TRY(read_run_length(input_bit_stream, OptionalNone {}, current_color, image_width, column));
TRY(encode_for({ invert(current_color), column + run_length }));
break;
}
case Mode::Vertical_0:
TRY(encode_for(TRY(next_change_on_reference_line())));
break;
case Mode::Vertical_R1:
TRY(encode_for(TRY(next_change_on_reference_line()), 1));
break;
case Mode::Vertical_R2:
TRY(encode_for(TRY(next_change_on_reference_line()), 2));
break;
case Mode::Vertical_R3:
TRY(encode_for(TRY(next_change_on_reference_line()), 3));
break;
case Mode::Vertical_L1:
TRY(encode_for(TRY(next_change_on_reference_line()), -1));
break;
case Mode::Vertical_L2:
TRY(encode_for(TRY(next_change_on_reference_line()), -2));
break;
case Mode::Vertical_L3:
TRY(encode_for(TRY(next_change_on_reference_line()), -3));
break;
default:
return Error::from_string_literal("CCITTDecoder: Unsupported mode for 2D decoding");
}
}
TRY(decoded_bits.align_to_byte_boundary());
return status;
}
ErrorOr<void> decode_single_ccitt3_2d_block(BigEndianInputBitStream& input_bit_stream, BigEndianOutputBitStream& decoded_bits, u32 image_width, u32 image_height, Group3Options::UseFillBits use_fill_bits)
{
ReferenceLine reference_line;
for (u32 i = 0; i < image_height; ++i) {
TRY(read_eol(input_bit_stream, use_fill_bits));
bool const next_is_1D = TRY(input_bit_stream.read_bit()) == 1;
if (next_is_1D)
reference_line = TRY(decode_single_ccitt3_1d_line(input_bit_stream, decoded_bits, image_width));
else
reference_line = TRY(decode_single_ccitt_2d_line(input_bit_stream, decoded_bits, move(reference_line), image_width)).current_line;
}
return {};
}
}
ErrorOr<ByteBuffer> decode_ccitt_rle(ReadonlyBytes bytes, u32 image_width, u32 image_height)
{
auto strip_stream = make<FixedMemoryStream>(bytes);
auto bit_stream = make<BigEndianInputBitStream>(MaybeOwned<Stream>(*strip_stream));
// Note: We put image_height extra-space to handle at most one alignment to byte boundary per line.
ByteBuffer decoded_bytes = TRY(ByteBuffer::create_zeroed(ceil_div(image_width * image_height, 8) + image_height));
auto output_stream = make<FixedMemoryStream>(decoded_bytes.bytes());
auto decoded_bits = make<BigEndianOutputBitStream>(MaybeOwned<Stream>(*output_stream));
while (!bit_stream->is_eof()) {
TRY(decode_single_ccitt3_1d_line(*bit_stream, *decoded_bits, image_width));
bit_stream->align_to_byte_boundary();
}
return decoded_bytes;
}
ErrorOr<ByteBuffer> decode_ccitt_group3(ReadonlyBytes bytes, u32 image_width, u32 image_height, Group3Options const& options)
{
auto strip_stream = make<FixedMemoryStream>(bytes);
auto bit_stream = make<BigEndianInputBitStream>(MaybeOwned<Stream>(*strip_stream));
// Note: We put image_height extra-space to handle at most one alignment to byte boundary per line.
ByteBuffer decoded_bytes = TRY(ByteBuffer::create_zeroed(ceil_div(image_width * image_height, 8) + image_height));
auto output_stream = make<FixedMemoryStream>(decoded_bytes.bytes());
auto decoded_bits = make<BigEndianOutputBitStream>(MaybeOwned<Stream>(*output_stream));
if (options.dimensions == Group3Options::Mode::OneDimension) {
// 4.1.2 End-of-line (EOL)
// This code word follows each line of data. It is a unique code word that can never be found within a
// valid line of data; therefore, resynchronization after an error burst is possible.
// In addition, this signal will occur prior to the first data line of a page.
// ---
// NOTE: For whatever reason, the last EOL doesn't seem to be included
for (u32 i = 0; i < image_height; ++i) {
if (options.require_end_of_line == Group3Options::RequireEndOfLine::Yes)
TRY(read_eol(*bit_stream, options.use_fill_bits));
TRY(decode_single_ccitt3_1d_line(*bit_stream, *decoded_bits, image_width));
if (options.encoded_byte_aligned == Group3Options::EncodedByteAligned::Yes)
bit_stream->align_to_byte_boundary();
}
return decoded_bytes;
}
if (options.require_end_of_line == Group3Options::RequireEndOfLine::No || options.encoded_byte_aligned == Group3Options::EncodedByteAligned::Yes)
return Error::from_string_literal("CCITTDecoder: Unsupported option for CCITT3 2D decoding");
TRY(decode_single_ccitt3_2d_block(*bit_stream, *decoded_bits, image_width, image_height, options.use_fill_bits));
return decoded_bytes;
}
ErrorOr<ByteBuffer> decode_ccitt_group4(ReadonlyBytes bytes, u32 image_width, u32 image_height)
{
auto strip_stream = make<FixedMemoryStream>(bytes);
auto bit_stream = make<BigEndianInputBitStream>(MaybeOwned<Stream>(*strip_stream));
auto output_stream = make<AllocatingMemoryStream>();
auto decoded_bits = make<BigEndianOutputBitStream>(MaybeOwned<Stream>(*output_stream));
// T.6 2.2.1 Principle of the coding scheme
// The reference line for the first coding line in a page is an imaginary white line.
CCITTStatus status;
TRY(status.current_line.try_empend(ccitt_black, image_width));
u32 i {};
while (!status.has_reached_eol && (image_height == 0 || i < image_height)) {
status = TRY(decode_single_ccitt_2d_line(*bit_stream, *decoded_bits, move(status.current_line), image_width));
++i;
}
return output_stream->read_until_eof();
}
}

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/*
* Copyright (c) 2023, Lucas Chollet <lucas.chollet@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/ByteBuffer.h>
namespace Gfx::CCITT {
// You can find a great overview of CCITT compression schemes here:
// https://www.fileformat.info/mirror/egff/ch09_05.htm
// The CCITT3 specification is accessible at this page:
// https://www.itu.int/rec/T-REC-T.4/en
// And CCITT4's specification is available here:
// https://www.itu.int/rec/T-REC-T.6/en
// The unidimensional scheme is originally described in:
// 4.1 One-dimensional coding scheme
// However, this function implements the TIFF variant (see TIFFLoader.h for a spec link),
// differences are detailed in section:
// Section 10: Modified Huffman Compression
ErrorOr<ByteBuffer> decode_ccitt_rle(ReadonlyBytes bytes, u32 image_width, u32 image_height);
// While this is named for a CCITT context, this struct holds data like TIFF's T4Options tag
struct Group3Options {
enum class Mode : u8 {
OneDimension,
TwoDimensions,
};
enum class Compression : u8 {
Uncompressed,
Compressed,
};
enum class UseFillBits : u8 {
No = 0,
Yes = 1,
};
// Addition from the PDF specification
enum class RequireEndOfLine : u8 {
No = 0,
Yes = 1,
};
enum class EncodedByteAligned : u8 {
No = 0,
Yes = 1,
};
Mode dimensions = Mode::OneDimension;
Compression compression = Compression::Compressed;
UseFillBits use_fill_bits = UseFillBits::No;
// Default values are set to be compatible with the CCITT specification
RequireEndOfLine require_end_of_line = RequireEndOfLine::Yes;
EncodedByteAligned encoded_byte_aligned = EncodedByteAligned::No;
};
ErrorOr<ByteBuffer> decode_ccitt_group3(ReadonlyBytes bytes, u32 image_width, u32 image_height, Group3Options const& options);
ErrorOr<ByteBuffer> decode_ccitt_group4(ReadonlyBytes bytes, u32 image_width, u32 image_height);
}

View file

@ -12,7 +12,6 @@
#include <LibGfx/ImageFormats/JPEGLoader.h>
#include <LibGfx/ImageFormats/JPEGXLLoader.h>
#include <LibGfx/ImageFormats/PNGLoader.h>
#include <LibGfx/ImageFormats/TIFFLoader.h>
#include <LibGfx/ImageFormats/WebPLoader.h>
namespace Gfx {
@ -31,7 +30,6 @@ static ErrorOr<OwnPtr<ImageDecoderPlugin>> probe_and_sniff_for_appropriate_plugi
{ JPEGImageDecoderPlugin::sniff, JPEGImageDecoderPlugin::create },
{ JPEGXLImageDecoderPlugin::sniff, JPEGXLImageDecoderPlugin::create },
{ PNGImageDecoderPlugin::sniff, PNGImageDecoderPlugin::create },
{ TIFFImageDecoderPlugin::sniff, TIFFImageDecoderPlugin::create },
{ WebPImageDecoderPlugin::sniff, WebPImageDecoderPlugin::create },
{ AVIFImageDecoderPlugin::sniff, AVIFImageDecoderPlugin::create }
};

View file

@ -1,802 +0,0 @@
/*
* Copyright (c) 2023, Lucas Chollet <lucas.chollet@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "TIFFLoader.h"
#include <AK/ConstrainedStream.h>
#include <AK/Debug.h>
#include <AK/Endian.h>
#include <AK/String.h>
#include <LibCompress/Lzw.h>
#include <LibCompress/PackBitsDecoder.h>
#include <LibCompress/Zlib.h>
#include <LibGfx/CMYKBitmap.h>
#include <LibGfx/ImageFormats/CCITTDecoder.h>
#include <LibGfx/ImageFormats/ExifOrientedBitmap.h>
#include <LibGfx/ImageFormats/TIFFMetadata.h>
namespace Gfx {
namespace {
CCITT::Group3Options parse_t4_options(u32 bit_field)
{
// Section 11: CCITT Bilevel Encodings
CCITT::Group3Options options {};
if (bit_field & 0b001)
options.dimensions = CCITT::Group3Options::Mode::TwoDimensions;
if (bit_field & 0b010)
options.compression = CCITT::Group3Options::Compression::Uncompressed;
if (bit_field & 0b100)
options.use_fill_bits = CCITT::Group3Options::UseFillBits::Yes;
return options;
}
bool is_bilevel(TIFF::PhotometricInterpretation interpretation)
{
return interpretation == TIFF::PhotometricInterpretation::WhiteIsZero || interpretation == TIFF::PhotometricInterpretation::BlackIsZero;
}
}
namespace TIFF {
class TIFFLoadingContext {
public:
enum class State {
NotDecoded = 0,
Error,
HeaderDecoded,
FrameDecoded,
};
TIFFLoadingContext(NonnullOwnPtr<FixedMemoryStream> stream)
: m_stream(move(stream))
{
}
ErrorOr<void> decode_image_header()
{
TRY(read_image_file_header());
TRY(read_next_image_file_directory());
m_state = State::HeaderDecoded;
return {};
}
ErrorOr<void> ensure_conditional_tags_are_correct() const
{
if (m_metadata.photometric_interpretation() == PhotometricInterpretation::RGBPalette && !m_metadata.color_map().has_value())
return Error::from_string_literal("TIFFImageDecoderPlugin: RGBPalette image doesn't contain a color map");
if (m_metadata.tile_width() == 0u || m_metadata.tile_length() == 0u)
return Error::from_string_literal("TIFFImageDecoderPlugin: Null value in tile's dimensions");
return {};
}
Optional<Vector<u32>> segment_offsets() const
{
return m_metadata.strip_offsets().has_value() ? m_metadata.strip_offsets() : m_metadata.tile_offsets();
}
Optional<Vector<u32>> segment_byte_counts() const
{
return m_metadata.strip_byte_counts().has_value() ? m_metadata.strip_byte_counts() : m_metadata.tile_byte_counts();
}
bool is_tiled() const
{
return m_metadata.tile_width().has_value() && m_metadata.tile_length().has_value();
}
ErrorOr<void> ensure_baseline_tags_are_correct() const
{
if (!segment_offsets().has_value())
return Error::from_string_literal("TIFFImageDecoderPlugin: Missing Offsets tag");
if (!segment_byte_counts().has_value())
return Error::from_string_literal("TIFFImageDecoderPlugin: Missing ByteCounts tag");
if (segment_offsets()->size() != segment_byte_counts()->size())
return Error::from_string_literal("TIFFImageDecoderPlugin: StripsOffset and StripByteCount have different sizes");
if (!m_metadata.rows_per_strip().has_value() && segment_byte_counts()->size() != 1 && !is_tiled())
return Error::from_string_literal("TIFFImageDecoderPlugin: RowsPerStrip is not provided and impossible to deduce");
if (!is_bilevel(*m_metadata.photometric_interpretation())) {
if (!m_metadata.bits_per_sample().has_value())
return Error::from_string_literal("TIFFImageDecoderPlugin: Tag BitsPerSample is missing");
if (!m_metadata.samples_per_pixel().has_value())
return Error::from_string_literal("TIFFImageDecoderPlugin: Tag SamplesPerPixel is missing");
if (any_of(*m_metadata.bits_per_sample(), [](auto bit_depth) { return bit_depth == 0 || bit_depth > 32; }))
return Error::from_string_literal("TIFFImageDecoderPlugin: Invalid value in BitsPerSample");
if (m_metadata.bits_per_sample()->size() != m_metadata.samples_per_pixel())
return Error::from_string_literal("TIFFImageDecoderPlugin: Invalid number of values in BitsPerSample");
if (*m_metadata.samples_per_pixel() < samples_for_photometric_interpretation())
return Error::from_string_literal("TIFFImageDecoderPlugin: Not enough values in BitsPerSample for given PhotometricInterpretation");
}
return {};
}
void cache_values()
{
if (m_metadata.photometric_interpretation().has_value())
m_photometric_interpretation = m_metadata.photometric_interpretation().value();
if (m_metadata.bits_per_sample().has_value())
m_bits_per_sample = m_metadata.bits_per_sample().value();
else if (is_bilevel(m_photometric_interpretation))
m_bits_per_sample.append(1);
if (m_metadata.image_width().has_value())
m_image_width = m_metadata.image_width().value();
if (m_metadata.predictor().has_value())
m_predictor = m_metadata.predictor().value();
m_alpha_channel_index = alpha_channel_index();
}
ErrorOr<void> decode_frame()
{
TRY(ensure_baseline_tags_are_present(m_metadata));
TRY(ensure_baseline_tags_are_correct());
TRY(ensure_conditional_tags_are_correct());
cache_values();
auto maybe_error = decode_frame_impl();
if (maybe_error.is_error()) {
m_state = State::Error;
return maybe_error.release_error();
}
return {};
}
IntSize size() const
{
return ExifOrientedBitmap::oriented_size({ *m_metadata.image_width(), *m_metadata.image_length() }, *m_metadata.orientation());
}
ExifMetadata const& metadata() const
{
return m_metadata;
}
State state() const
{
return m_state;
}
RefPtr<CMYKBitmap> cmyk_bitmap() const
{
return m_cmyk_bitmap;
}
RefPtr<Bitmap> bitmap() const
{
return m_bitmap;
}
private:
enum class ByteOrder {
LittleEndian,
BigEndian,
};
static ErrorOr<u8> read_component(BigEndianInputBitStream& stream, u8 bits)
{
// FIXME: This function truncates everything to 8-bits
auto const value = TRY(stream.read_bits<u32>(bits));
if (bits > 8)
return value >> (bits - 8);
return NumericLimits<u8>::max() * value / ((1 << bits) - 1);
}
u8 samples_for_photometric_interpretation() const
{
switch (m_photometric_interpretation) {
case PhotometricInterpretation::WhiteIsZero:
case PhotometricInterpretation::BlackIsZero:
case PhotometricInterpretation::RGBPalette:
return 1;
case PhotometricInterpretation::RGB:
return 3;
case PhotometricInterpretation::CMYK:
return 4;
default:
TODO();
}
}
Optional<u8> alpha_channel_index() const
{
if (m_metadata.extra_samples().has_value()) {
auto const extra_samples = m_metadata.extra_samples().value();
for (u8 i = 0; i < extra_samples.size(); ++i) {
if (extra_samples[i] == ExtraSample::UnassociatedAlpha)
return i + samples_for_photometric_interpretation();
}
}
return OptionalNone {};
}
ErrorOr<u8> manage_extra_channels(BigEndianInputBitStream& stream) const
{
// Section 7: Additional Baseline TIFF Requirements
// Some TIFF files may have more components per pixel than you think. A Baseline TIFF reader must skip over
// them gracefully, using the values of the SamplesPerPixel and BitsPerSample fields.
// Both unknown and alpha channels are considered as extra channels, so let's iterate over
// them, conserve the alpha value (if any) and discard everything else.
auto const number_base_channels = samples_for_photometric_interpretation();
Optional<u8> alpha {};
for (u8 i = number_base_channels; i < m_bits_per_sample.size(); ++i) {
if (m_alpha_channel_index == i)
alpha = TRY(read_component(stream, m_bits_per_sample[i]));
else
TRY(read_component(stream, m_bits_per_sample[i]));
}
return alpha.value_or(NumericLimits<u8>::max());
}
ErrorOr<Color> read_color(BigEndianInputBitStream& stream)
{
if (m_photometric_interpretation == PhotometricInterpretation::RGB) {
auto const first_component = TRY(read_component(stream, m_bits_per_sample[0]));
auto const second_component = TRY(read_component(stream, m_bits_per_sample[1]));
auto const third_component = TRY(read_component(stream, m_bits_per_sample[2]));
auto const alpha = TRY(manage_extra_channels(stream));
return Color(first_component, second_component, third_component, alpha);
}
if (m_photometric_interpretation == PhotometricInterpretation::RGBPalette) {
auto const index = TRY(stream.read_bits<u16>(m_bits_per_sample[0]));
auto const alpha = TRY(manage_extra_channels(stream));
// SamplesPerPixel == 1 is a requirement for RGBPalette
// From description of PhotometricInterpretation in Section 8: Baseline Field Reference Guide
// "In a TIFF ColorMap, all the Red values come first, followed by the Green values,
// then the Blue values."
u64 const size = 1ul << m_bits_per_sample[0];
u64 const red_offset = 0 * size;
u64 const green_offset = 1 * size;
u64 const blue_offset = 2 * size;
auto const color_map = *m_metadata.color_map();
if (blue_offset + index >= color_map.size())
return Error::from_string_literal("TIFFImageDecoderPlugin: Color index is out of range");
// FIXME: ColorMap's values are always 16-bits, stop truncating them when we support 16 bits bitmaps
return Color(
color_map[red_offset + index] >> 8,
color_map[green_offset + index] >> 8,
color_map[blue_offset + index] >> 8,
alpha);
}
if (m_photometric_interpretation == PhotometricInterpretation::WhiteIsZero
|| m_photometric_interpretation == PhotometricInterpretation::BlackIsZero) {
auto luminosity = TRY(read_component(stream, m_bits_per_sample[0]));
if (m_photometric_interpretation == PhotometricInterpretation::WhiteIsZero)
luminosity = ~luminosity;
auto const alpha = TRY(manage_extra_channels(stream));
return Color(luminosity, luminosity, luminosity, alpha);
}
return Error::from_string_literal("Unsupported value for PhotometricInterpretation");
}
ErrorOr<CMYK> read_color_cmyk(BigEndianInputBitStream& stream)
{
VERIFY(m_photometric_interpretation == PhotometricInterpretation::CMYK);
auto const first_component = TRY(read_component(stream, m_bits_per_sample[0]));
auto const second_component = TRY(read_component(stream, m_bits_per_sample[1]));
auto const third_component = TRY(read_component(stream, m_bits_per_sample[2]));
auto const fourth_component = TRY(read_component(stream, m_bits_per_sample[3]));
// FIXME: We probably won't encounter CMYK images with an alpha channel, but if
// we do: the first step to support them is not dropping the value here!
[[maybe_unused]] auto const alpha = TRY(manage_extra_channels(stream));
return CMYK { first_component, second_component, third_component, fourth_component };
}
template<CallableAs<ErrorOr<ReadonlyBytes>, u32, IntSize> SegmentDecoder>
ErrorOr<void> loop_over_pixels(SegmentDecoder&& segment_decoder)
{
auto const offsets = *segment_offsets();
auto const byte_counts = *segment_byte_counts();
auto const segment_length = m_metadata.tile_length().value_or(m_metadata.rows_per_strip().value_or(*m_metadata.image_length()));
auto const segment_width = m_metadata.tile_width().value_or(m_image_width);
auto const segment_per_rows = m_metadata.tile_width().map([&](u32 w) { return ceil_div(m_image_width, w); }).value_or(1);
Variant<ExifOrientedBitmap, ExifOrientedCMYKBitmap> oriented_bitmap = TRY(([&]() -> ErrorOr<Variant<ExifOrientedBitmap, ExifOrientedCMYKBitmap>> {
if (m_photometric_interpretation == PhotometricInterpretation::CMYK)
return ExifOrientedCMYKBitmap::create(*metadata().orientation(), { m_image_width, *metadata().image_length() });
return ExifOrientedBitmap::create(*metadata().orientation(), { m_image_width, *metadata().image_length() }, BitmapFormat::BGRA8888);
}()));
for (u32 segment_index = 0; segment_index < offsets.size(); ++segment_index) {
TRY(m_stream->seek(offsets[segment_index]));
auto const rows_in_segment = segment_index < offsets.size() - 1 ? segment_length : *m_metadata.image_length() - segment_length * segment_index;
auto const decoded_bytes = TRY(segment_decoder(byte_counts[segment_index], { segment_width, rows_in_segment }));
auto decoded_segment = make<FixedMemoryStream>(decoded_bytes);
auto decoded_stream = make<BigEndianInputBitStream>(move(decoded_segment));
for (u32 row = 0; row < segment_length; row++) {
auto const image_row = row + segment_length * (segment_index / segment_per_rows);
if (image_row >= *m_metadata.image_length())
break;
Optional<Color> last_color {};
for (u32 column = 0; column < segment_width; ++column) {
// If image_length % segment_length != 0, the last tile will be padded.
// This variable helps us to skip these last columns. Note that we still
// need to read the sample from the stream.
auto const image_column = column + segment_width * (segment_index % segment_per_rows);
if (m_photometric_interpretation == PhotometricInterpretation::CMYK) {
auto const cmyk = TRY(read_color_cmyk(*decoded_stream));
if (image_column >= m_image_width)
continue;
oriented_bitmap.get<ExifOrientedCMYKBitmap>().set_pixel(image_column, image_row, cmyk);
} else {
auto color = TRY(read_color(*decoded_stream));
// FIXME: We should do the differencing at the byte-stream level, that would make it
// compatible with both LibPDF and all color formats.
if (m_predictor == Predictor::HorizontalDifferencing && last_color.has_value()) {
color.set_red(last_color->red() + color.red());
color.set_green(last_color->green() + color.green());
color.set_blue(last_color->blue() + color.blue());
if (m_alpha_channel_index.has_value())
color.set_alpha(last_color->alpha() + color.alpha());
}
last_color = color;
if (image_column >= m_image_width)
continue;
oriented_bitmap.get<ExifOrientedBitmap>().set_pixel(image_column, image_row, color.value());
}
}
decoded_stream->align_to_byte_boundary();
}
}
if (m_photometric_interpretation == PhotometricInterpretation::CMYK)
m_cmyk_bitmap = oriented_bitmap.get<ExifOrientedCMYKBitmap>().bitmap();
else
m_bitmap = oriented_bitmap.get<ExifOrientedBitmap>().bitmap();
return {};
}
ErrorOr<void> ensure_tags_are_correct_for_ccitt() const
{
// Section 8: Baseline Field Reference Guide
// BitsPerSample must be 1, since this type of compression is defined only for bilevel images.
if (m_bits_per_sample.size() > 1)
return Error::from_string_literal("TIFFImageDecoderPlugin: CCITT image with BitsPerSample greater than one");
if (!is_bilevel(*m_metadata.photometric_interpretation()))
return Error::from_string_literal("TIFFImageDecoderPlugin: CCITT compression is used on a non bilevel image");
return {};
}
ErrorOr<ByteBuffer> read_bytes_considering_fill_order(u32 bytes_to_read) const
{
auto const reverse_byte = [](u8 b) {
b = (b & 0xF0) >> 4 | (b & 0x0F) << 4;
b = (b & 0xCC) >> 2 | (b & 0x33) << 2;
b = (b & 0xAA) >> 1 | (b & 0x55) << 1;
return b;
};
auto const bytes = TRY(m_stream->read_in_place<u8 const>(bytes_to_read));
auto copy = TRY(ByteBuffer::copy(bytes));
if (m_metadata.fill_order() == FillOrder::RightToLeft) {
for (auto& byte : copy.bytes())
byte = reverse_byte(byte);
}
return copy;
}
ErrorOr<void> decode_frame_impl()
{
switch (*m_metadata.compression()) {
case Compression::NoCompression: {
auto identity = [&](u32 num_bytes, IntSize) {
return m_stream->read_in_place<u8 const>(num_bytes);
};
TRY(loop_over_pixels(move(identity)));
break;
}
case Compression::CCITTRLE: {
TRY(ensure_tags_are_correct_for_ccitt());
ByteBuffer decoded_bytes {};
auto decode_ccitt_rle_segment = [&](u32 num_bytes, IntSize segment_size) -> ErrorOr<ReadonlyBytes> {
auto const encoded_bytes = TRY(read_bytes_considering_fill_order(num_bytes));
decoded_bytes = TRY(CCITT::decode_ccitt_rle(encoded_bytes, segment_size.width(), segment_size.height()));
return decoded_bytes;
};
TRY(loop_over_pixels(move(decode_ccitt_rle_segment)));
break;
}
case Compression::Group3Fax: {
TRY(ensure_tags_are_correct_for_ccitt());
auto const parameters = parse_t4_options(*m_metadata.t4_options());
ByteBuffer decoded_bytes {};
auto decode_group3_segment = [&](u32 num_bytes, IntSize segment_size) -> ErrorOr<ReadonlyBytes> {
auto const encoded_bytes = TRY(read_bytes_considering_fill_order(num_bytes));
decoded_bytes = TRY(CCITT::decode_ccitt_group3(encoded_bytes, segment_size.width(), segment_size.height(), parameters));
return decoded_bytes;
};
TRY(loop_over_pixels(move(decode_group3_segment)));
break;
}
case Compression::Group4Fax: {
TRY(ensure_tags_are_correct_for_ccitt());
// FIXME: We need to parse T6 options
ByteBuffer decoded_bytes {};
auto decode_group3_segment = [&](u32 num_bytes, IntSize segment_size) -> ErrorOr<ReadonlyBytes> {
auto const encoded_bytes = TRY(read_bytes_considering_fill_order(num_bytes));
decoded_bytes = TRY(CCITT::decode_ccitt_group4(encoded_bytes, segment_size.width(), segment_size.height()));
return decoded_bytes;
};
TRY(loop_over_pixels(move(decode_group3_segment)));
break;
}
case Compression::LZW: {
ByteBuffer decoded_bytes {};
auto decode_lzw_segment = [&](u32 num_bytes, IntSize) -> ErrorOr<ReadonlyBytes> {
auto const encoded_bytes = TRY(m_stream->read_in_place<u8 const>(num_bytes));
if (encoded_bytes.is_empty())
return Error::from_string_literal("TIFFImageDecoderPlugin: Unable to read from empty LZW segment");
// Note: AFAIK, there are two common ways to use LZW compression:
// - With a LittleEndian stream and no Early-Change, this is used in the GIF format
// - With a BigEndian stream and an EarlyChange of 1, this is used in the PDF format
// The fun begins when they decided to change from the former to the latter when moving
// from TIFF 5.0 to 6.0, and without including a way for files to be identified.
// Fortunately, as the first byte of a LZW stream is a constant we can guess the endianness
// and deduce the version from it. The first code is 0x100 (9-bits).
if (encoded_bytes[0] == 0x00)
decoded_bytes = TRY(Compress::LzwDecompressor<LittleEndianInputBitStream>::decompress_all(encoded_bytes, 8, 0));
else
decoded_bytes = TRY(Compress::LzwDecompressor<BigEndianInputBitStream>::decompress_all(encoded_bytes, 8, -1));
return decoded_bytes;
};
TRY(loop_over_pixels(move(decode_lzw_segment)));
break;
}
case Compression::AdobeDeflate:
case Compression::PixarDeflate: {
// This is an extension from the Technical Notes from 2002:
// https://web.archive.org/web/20160305055905/http://partners.adobe.com/public/developer/en/tiff/TIFFphotoshop.pdf
ByteBuffer decoded_bytes {};
auto decode_zlib = [&](u32 num_bytes, IntSize) -> ErrorOr<ReadonlyBytes> {
auto stream = make<ConstrainedStream>(MaybeOwned<Stream>(*m_stream), num_bytes);
auto decompressed_stream = TRY(Compress::ZlibDecompressor::create(move(stream)));
decoded_bytes = TRY(decompressed_stream->read_until_eof(4096));
return decoded_bytes;
};
TRY(loop_over_pixels(move(decode_zlib)));
break;
}
case Compression::PackBits: {
// Section 9: PackBits Compression
ByteBuffer decoded_bytes {};
auto decode_packbits_segment = [&](u32 num_bytes, IntSize) -> ErrorOr<ReadonlyBytes> {
auto const encoded_bytes = TRY(m_stream->read_in_place<u8 const>(num_bytes));
decoded_bytes = TRY(Compress::PackBits::decode_all(encoded_bytes));
return decoded_bytes;
};
TRY(loop_over_pixels(move(decode_packbits_segment)));
break;
}
default:
return Error::from_string_literal("This compression type is not supported yet :^)");
}
return {};
}
template<typename T>
ErrorOr<T> read_value()
{
if (m_byte_order == ByteOrder::LittleEndian)
return TRY(m_stream->read_value<LittleEndian<T>>());
if (m_byte_order == ByteOrder::BigEndian)
return TRY(m_stream->read_value<BigEndian<T>>());
VERIFY_NOT_REACHED();
}
ErrorOr<void> set_next_ifd(u32 ifd_offset)
{
if (ifd_offset != 0) {
if (ifd_offset < TRY(m_stream->tell()))
return Error::from_string_literal("TIFFImageDecoderPlugin: Can not accept an IFD pointing to previous data");
m_next_ifd = Optional<u32> { ifd_offset };
} else {
m_next_ifd = OptionalNone {};
}
return {};
}
ErrorOr<void> read_next_idf_offset()
{
auto const next_block_position = TRY(read_value<u32>());
TRY(set_next_ifd(next_block_position));
return {};
}
ErrorOr<void> read_image_file_header()
{
// Section 2: TIFF Structure - Image File Header
auto const byte_order = TRY(m_stream->read_value<u16>());
switch (byte_order) {
case 0x4949:
m_byte_order = ByteOrder::LittleEndian;
break;
case 0x4D4D:
m_byte_order = ByteOrder::BigEndian;
break;
default:
return Error::from_string_literal("TIFFImageDecoderPlugin: Invalid byte order");
}
auto const magic_number = TRY(read_value<u16>());
if (magic_number != 42)
return Error::from_string_literal("TIFFImageDecoderPlugin: Invalid magic number");
TRY(read_next_idf_offset());
return {};
}
ErrorOr<void> read_next_image_file_directory()
{
// Section 2: TIFF Structure - Image File Directory
if (!m_next_ifd.has_value())
return Error::from_string_literal("TIFFImageDecoderPlugin: Missing an Image File Directory");
dbgln_if(TIFF_DEBUG, "Reading image file directory at offset {}", m_next_ifd);
TRY(m_stream->seek(m_next_ifd.value()));
auto const number_of_field = TRY(read_value<u16>());
auto next_tag_offset = TRY(m_stream->tell());
for (u16 i = 0; i < number_of_field; ++i) {
if (auto maybe_error = read_tag(); maybe_error.is_error() && TIFF_DEBUG)
dbgln("Unable to decode tag {}/{}", i + 1, number_of_field);
// Section 2: TIFF Structure
// IFD Entry
// Size of tag(u16) + type(u16) + count(u32) + value_or_offset(u32) = 12
next_tag_offset += 12;
TRY(m_stream->seek(next_tag_offset));
}
TRY(read_next_idf_offset());
return {};
}
ErrorOr<Vector<Value, 1>> read_tiff_value(Type type, u32 count, u32 offset)
{
auto const old_offset = TRY(m_stream->tell());
ScopeGuard reset_offset { [this, old_offset]() { MUST(m_stream->seek(old_offset)); } };
TRY(m_stream->seek(offset));
if (size_of_type(type) * count > m_stream->remaining())
return Error::from_string_literal("TIFFImageDecoderPlugin: Tag size claims to be bigger that remaining bytes");
auto const read_every_values = [this, count]<typename T>() -> ErrorOr<Vector<Value>> {
Vector<Value, 1> result {};
TRY(result.try_ensure_capacity(count));
if constexpr (IsSpecializationOf<T, Rational>) {
for (u32 i = 0; i < count; ++i)
result.empend(T { TRY(read_value<typename T::Type>()), TRY(read_value<typename T::Type>()) });
} else {
for (u32 i = 0; i < count; ++i)
result.empend(typename TypePromoter<T>::Type(TRY(read_value<T>())));
}
return result;
};
switch (type) {
case Type::Byte:
case Type::Undefined: {
Vector<Value, 1> result;
auto buffer = TRY(ByteBuffer::create_uninitialized(count));
TRY(m_stream->read_until_filled(buffer));
result.append(move(buffer));
return result;
}
case Type::ASCII:
case Type::UTF8: {
Vector<Value, 1> result;
// NOTE: No need to include the null terminator
if (count > 0)
--count;
auto string_data = TRY(ByteBuffer::create_uninitialized(count));
TRY(m_stream->read_until_filled(string_data));
result.empend(TRY(String::from_utf8(StringView { string_data.bytes() })));
return result;
}
case Type::UnsignedShort:
return read_every_values.template operator()<u16>();
case Type::IFD:
case Type::UnsignedLong:
return read_every_values.template operator()<u32>();
case Type::UnsignedRational:
return read_every_values.template operator()<Rational<u32>>();
case Type::SignedLong:
return read_every_values.template operator()<i32>();
case Type::SignedRational:
return read_every_values.template operator()<Rational<i32>>();
case Type::Float:
return read_every_values.template operator()<float>();
case Type::Double:
return read_every_values.template operator()<double>();
default:
VERIFY_NOT_REACHED();
}
}
ErrorOr<void> read_tag()
{
auto const tag = TRY(read_value<u16>());
auto const raw_type = TRY(read_value<u16>());
auto const type = TRY(tiff_type_from_u16(raw_type));
auto const count = TRY(read_value<u32>());
Checked<u32> checked_size = size_of_type(type);
checked_size *= count;
if (checked_size.has_overflow())
return Error::from_string_literal("TIFFImageDecoderPlugin: Invalid tag with too large data");
auto tiff_value = TRY(([=, this]() -> ErrorOr<Vector<Value>> {
if (checked_size.value() <= 4) {
auto value = TRY(read_tiff_value(type, count, TRY(m_stream->tell())));
TRY(m_stream->discard(4));
return value;
}
auto const offset = TRY(read_value<u32>());
return read_tiff_value(type, count, offset);
}()));
auto subifd_handler = [&](u32 ifd_offset) -> ErrorOr<void> {
if (auto result = set_next_ifd(ifd_offset); result.is_error()) {
dbgln("{}", result.error());
return {};
}
TRY(read_next_image_file_directory());
return {};
};
TRY(handle_tag(move(subifd_handler), m_metadata, tag, type, count, move(tiff_value)));
return {};
}
NonnullOwnPtr<FixedMemoryStream> m_stream;
State m_state {};
RefPtr<Bitmap> m_bitmap {};
RefPtr<CMYKBitmap> m_cmyk_bitmap {};
ByteOrder m_byte_order {};
Optional<u32> m_next_ifd {};
ExifMetadata m_metadata {};
// These are caches for m_metadata values
PhotometricInterpretation m_photometric_interpretation {};
Vector<u32, 4> m_bits_per_sample {};
u32 m_image_width {};
Predictor m_predictor {};
Optional<u8> m_alpha_channel_index {};
};
}
TIFFImageDecoderPlugin::TIFFImageDecoderPlugin(NonnullOwnPtr<FixedMemoryStream> stream)
{
m_context = make<TIFF::TIFFLoadingContext>(move(stream));
}
TIFFImageDecoderPlugin::~TIFFImageDecoderPlugin() = default;
bool TIFFImageDecoderPlugin::sniff(ReadonlyBytes bytes)
{
if (bytes.size() < 4)
return false;
bool const valid_little_endian = bytes[0] == 0x49 && bytes[1] == 0x49 && bytes[2] == 0x2A && bytes[3] == 0x00;
bool const valid_big_endian = bytes[0] == 0x4D && bytes[1] == 0x4D && bytes[2] == 0x00 && bytes[3] == 0x2A;
return valid_little_endian || valid_big_endian;
}
IntSize TIFFImageDecoderPlugin::size()
{
return m_context->size();
}
ErrorOr<NonnullOwnPtr<ImageDecoderPlugin>> TIFFImageDecoderPlugin::create(ReadonlyBytes data)
{
auto stream = TRY(try_make<FixedMemoryStream>(data));
auto plugin = TRY(adopt_nonnull_own_or_enomem(new (nothrow) TIFFImageDecoderPlugin(move(stream))));
TRY(plugin->m_context->decode_image_header());
return plugin;
}
ErrorOr<ImageFrameDescriptor> TIFFImageDecoderPlugin::frame(size_t index, Optional<IntSize>)
{
if (index > 0)
return Error::from_string_literal("TIFFImageDecoderPlugin: Invalid frame index");
if (m_context->state() == TIFF::TIFFLoadingContext::State::Error)
return Error::from_string_literal("TIFFImageDecoderPlugin: Decoding failed");
if (m_context->state() < TIFF::TIFFLoadingContext::State::FrameDecoded)
TRY(m_context->decode_frame());
if (m_context->cmyk_bitmap())
return ImageFrameDescriptor { TRY(m_context->cmyk_bitmap()->to_low_quality_rgb()), 0 };
return ImageFrameDescriptor { *m_context->bitmap(), 0 };
}
Optional<Metadata const&> TIFFImageDecoderPlugin::metadata()
{
return m_context->metadata();
}
ErrorOr<Optional<ReadonlyBytes>> TIFFImageDecoderPlugin::icc_data()
{
return m_context->metadata().icc_profile().map([](auto const& buffer) -> ReadonlyBytes { return buffer.bytes(); });
}
}

View file

@ -1,55 +0,0 @@
/*
* Copyright (c) 2023, Lucas Chollet <lucas.chollet@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/MemoryStream.h>
#include <AK/NonnullOwnPtr.h>
#include <LibGfx/ImageFormats/ImageDecoder.h>
namespace Gfx {
// This is a link to the main TIFF specification from 1992
// https://www.itu.int/itudoc/itu-t/com16/tiff-fx/docs/tiff6.pdf
// First TIFF Technical notes from 1995
// https://www.awaresystems.be/imaging/tiff/specification/TIFFPM6.pdf
// Second TIFF Technical notes from 1995
// The document is the second (and current) specification for embedded JPEGs in TIFF images.
// https://www.awaresystems.be/imaging/tiff/specification/TIFFTechNote2.txt
// This is also compatible with Exif as it is, basically, another set of TIFF tags:
// The spec is named "Exchangeable image file format for digital still cameras: Exif Version 3.0"
// And it can be found at https://www.cipa.jp/e/std/std-sec.html
namespace TIFF {
class TIFFLoadingContext;
}
class TIFFImageDecoderPlugin : public ImageDecoderPlugin {
public:
static bool sniff(ReadonlyBytes);
static ErrorOr<NonnullOwnPtr<ImageDecoderPlugin>> create(ReadonlyBytes);
virtual ~TIFFImageDecoderPlugin() override;
virtual IntSize size() override;
virtual ErrorOr<ImageFrameDescriptor> frame(size_t index, Optional<IntSize> ideal_size = {}) override;
virtual Optional<Metadata const&> metadata() override;
virtual ErrorOr<Optional<ReadonlyBytes>> icc_data() override;
private:
TIFFImageDecoderPlugin(NonnullOwnPtr<FixedMemoryStream>);
OwnPtr<TIFF::TIFFLoadingContext> m_context;
};
}

View file

@ -3,7 +3,6 @@ set(LIBGFX_IMAGE_FORMATS_DIR "${LADYBIRD_SOURCE_DIR}/Libraries/LibGfx/ImageForma
set(SOURCES
${LIBGFX_IMAGE_FORMATS_DIR}/AVIFLoader.cpp
${LIBGFX_IMAGE_FORMATS_DIR}/BMPLoader.cpp
${LIBGFX_IMAGE_FORMATS_DIR}/CCITTDecoder.cpp
${LIBGFX_IMAGE_FORMATS_DIR}/ExifReader.cpp
${LIBGFX_IMAGE_FORMATS_DIR}/GIFLoader.cpp
${LIBGFX_IMAGE_FORMATS_DIR}/ICOLoader.cpp
@ -11,7 +10,6 @@ set(SOURCES
${LIBGFX_IMAGE_FORMATS_DIR}/JPEGLoader.cpp
${LIBGFX_IMAGE_FORMATS_DIR}/JPEGXLLoader.cpp
${LIBGFX_IMAGE_FORMATS_DIR}/PNGLoader.cpp
${LIBGFX_IMAGE_FORMATS_DIR}/TIFFLoader.cpp
${LIBGFX_IMAGE_FORMATS_DIR}/WebPLoader.cpp
)

View file

@ -26,7 +26,6 @@ bool is_supported_image_type(StringView type)
|| type.equals_ignoring_ascii_case("image/png"sv)
|| type.equals_ignoring_ascii_case("image/apng"sv)
|| type.equals_ignoring_ascii_case("image/x-png"sv)
|| type.equals_ignoring_ascii_case("image/tiff"sv)
|| type.equals_ignoring_ascii_case("image/webp"sv)
|| type.equals_ignoring_ascii_case("image/svg+xml"sv);
}

View file

@ -1,18 +0,0 @@
/*
* Copyright (c) 2023, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibGfx/ImageFormats/TIFFLoader.h>
#include <stdio.h>
extern "C" int LLVMFuzzerTestOneInput(uint8_t const* data, size_t size)
{
auto decoder_or_error = Gfx::TIFFImageDecoderPlugin::create({ data, size });
if (decoder_or_error.is_error())
return 0;
auto decoder = decoder_or_error.release_value();
(void)decoder->frame(0);
return 0;
}

View file

@ -12,7 +12,6 @@ set(FUZZER_TARGETS
RegexECMA262
RSAKeyParsing
TextDecoder
TIFFLoader
URL
WasmParser
WOFF
@ -37,7 +36,6 @@ set(FUZZER_DEPENDENCIES_Poly1305 LibCrypto)
set(FUZZER_DEPENDENCIES_RegexECMA262 LibRegex)
set(FUZZER_DEPENDENCIES_RSAKeyParsing LibCrypto)
set(FUZZER_DEPENDENCIES_TextDecoder LibTextCodec)
set(FUZZER_DEPENDENCIES_TIFFLoader LibGfx LibImageDecoders)
set(FUZZER_DEPENDENCIES_TTF LibGfx)
set(FUZZER_DEPENDENCIES_URL LibURL)
set(FUZZER_DEPENDENCIES_WasmParser LibWasm)

View file

@ -15,7 +15,6 @@
#include <LibGfx/ImageFormats/JPEGLoader.h>
#include <LibGfx/ImageFormats/JPEGXLLoader.h>
#include <LibGfx/ImageFormats/PNGLoader.h>
#include <LibGfx/ImageFormats/TIFFLoader.h>
#include <LibGfx/ImageFormats/TIFFMetadata.h>
#include <LibGfx/ImageFormats/WebPLoader.h>
#include <LibTest/TestCase.h>
@ -593,276 +592,6 @@ TEST_CASE(test_png_large_dimensions)
EXPECT_EQ(plugin_decoder->frame(0).value().image->get_pixel(0, 0), Gfx::Color::NamedColor::Red);
}
TEST_CASE(test_tiff_uncompressed)
{
auto file = TRY_OR_FAIL(Core::MappedFile::map(TEST_INPUT("tiff/uncompressed.tiff"sv)));
EXPECT(Gfx::TIFFImageDecoderPlugin::sniff(file->bytes()));
auto plugin_decoder = TRY_OR_FAIL(Gfx::TIFFImageDecoderPlugin::create(file->bytes()));
auto frame = TRY_OR_FAIL(expect_single_frame_of_size(*plugin_decoder, { 400, 300 }));
EXPECT_EQ(frame.image->get_pixel(0, 0), Gfx::Color::NamedColor::White);
EXPECT_EQ(frame.image->get_pixel(60, 75), Gfx::Color::NamedColor::Red);
}
TEST_CASE(test_tiff_ccitt_rle)
{
auto file = TRY_OR_FAIL(Core::MappedFile::map(TEST_INPUT("tiff/ccitt_rle.tiff"sv)));
EXPECT(Gfx::TIFFImageDecoderPlugin::sniff(file->bytes()));
auto plugin_decoder = TRY_OR_FAIL(Gfx::TIFFImageDecoderPlugin::create(file->bytes()));
auto frame = TRY_OR_FAIL(expect_single_frame_of_size(*plugin_decoder, { 400, 300 }));
EXPECT_EQ(frame.image->get_pixel(0, 0), Gfx::Color::NamedColor::White);
EXPECT_EQ(frame.image->get_pixel(60, 75), Gfx::Color::NamedColor::Black);
}
TEST_CASE(test_tiff_ccitt3)
{
auto file = TRY_OR_FAIL(Core::MappedFile::map(TEST_INPUT("tiff/ccitt3.tiff"sv)));
EXPECT(Gfx::TIFFImageDecoderPlugin::sniff(file->bytes()));
auto plugin_decoder = TRY_OR_FAIL(Gfx::TIFFImageDecoderPlugin::create(file->bytes()));
auto frame = TRY_OR_FAIL(expect_single_frame_of_size(*plugin_decoder, { 400, 300 }));
EXPECT_EQ(frame.image->get_pixel(0, 0), Gfx::Color::NamedColor::White);
EXPECT_EQ(frame.image->get_pixel(60, 75), Gfx::Color::NamedColor::Black);
}
TEST_CASE(test_tiff_ccitt3_no_tags)
{
auto file = TRY_OR_FAIL(Core::MappedFile::map(TEST_INPUT("tiff/ccitt3_no_tags.tiff"sv)));
EXPECT(Gfx::TIFFImageDecoderPlugin::sniff(file->bytes()));
auto plugin_decoder = TRY_OR_FAIL(Gfx::TIFFImageDecoderPlugin::create(file->bytes()));
auto frame = TRY_OR_FAIL(expect_single_frame_of_size(*plugin_decoder, { 6, 4 }));
EXPECT_EQ(frame.image->get_pixel(0, 0), Gfx::Color::NamedColor::White);
EXPECT_EQ(frame.image->get_pixel(3, 0), Gfx::Color::NamedColor::Black);
EXPECT_EQ(frame.image->get_pixel(2, 2), Gfx::Color::NamedColor::White);
EXPECT_EQ(frame.image->get_pixel(5, 3), Gfx::Color::NamedColor::White);
}
TEST_CASE(test_tiff_ccitt3_fill)
{
auto file = TRY_OR_FAIL(Core::MappedFile::map(TEST_INPUT("tiff/ccitt3_1d_fill.tiff"sv)));
EXPECT(Gfx::TIFFImageDecoderPlugin::sniff(file->bytes()));
auto plugin_decoder = TRY_OR_FAIL(Gfx::TIFFImageDecoderPlugin::create(file->bytes()));
auto frame = TRY_OR_FAIL(expect_single_frame_of_size(*plugin_decoder, { 6, 4 }));
EXPECT_EQ(frame.image->get_pixel(0, 0), Gfx::Color::NamedColor::White);
EXPECT_EQ(frame.image->get_pixel(3, 0), Gfx::Color::NamedColor::Black);
EXPECT_EQ(frame.image->get_pixel(2, 2), Gfx::Color::NamedColor::White);
EXPECT_EQ(frame.image->get_pixel(5, 3), Gfx::Color::NamedColor::White);
}
TEST_CASE(test_tiff_ccitt3_2d)
{
auto file = TRY_OR_FAIL(Core::MappedFile::map(TEST_INPUT("tiff/ccitt3_2d.tiff"sv)));
EXPECT(Gfx::TIFFImageDecoderPlugin::sniff(file->bytes()));
auto plugin_decoder = TRY_OR_FAIL(Gfx::TIFFImageDecoderPlugin::create(file->bytes()));
auto frame = TRY_OR_FAIL(expect_single_frame_of_size(*plugin_decoder, { 400, 300 }));
EXPECT_EQ(frame.image->get_pixel(0, 0), Gfx::Color::NamedColor::White);
EXPECT_EQ(frame.image->get_pixel(60, 75), Gfx::Color::NamedColor::Black);
}
TEST_CASE(test_tiff_ccitt3_2d_fill)
{
auto file = TRY_OR_FAIL(Core::MappedFile::map(TEST_INPUT("tiff/ccitt3_2d_fill.tiff"sv)));
EXPECT(Gfx::TIFFImageDecoderPlugin::sniff(file->bytes()));
auto plugin_decoder = TRY_OR_FAIL(Gfx::TIFFImageDecoderPlugin::create(file->bytes()));
auto frame = TRY_OR_FAIL(expect_single_frame_of_size(*plugin_decoder, { 400, 300 }));
EXPECT_EQ(frame.image->get_pixel(0, 0), Gfx::Color::NamedColor::White);
EXPECT_EQ(frame.image->get_pixel(60, 75), Gfx::Color::NamedColor::Black);
}
TEST_CASE(test_tiff_ccitt4)
{
auto file = TRY_OR_FAIL(Core::MappedFile::map(TEST_INPUT("tiff/ccitt4.tiff"sv)));
EXPECT(Gfx::TIFFImageDecoderPlugin::sniff(file->bytes()));
auto plugin_decoder = TRY_OR_FAIL(Gfx::TIFFImageDecoderPlugin::create(file->bytes()));
auto frame = TRY_OR_FAIL(expect_single_frame_of_size(*plugin_decoder, { 400, 300 }));
EXPECT_EQ(frame.image->get_pixel(0, 0), Gfx::Color::NamedColor::White);
EXPECT_EQ(frame.image->get_pixel(60, 75), Gfx::Color::NamedColor::Black);
}
TEST_CASE(test_tiff_lzw)
{
auto file = TRY_OR_FAIL(Core::MappedFile::map(TEST_INPUT("tiff/lzw.tiff"sv)));
EXPECT(Gfx::TIFFImageDecoderPlugin::sniff(file->bytes()));
auto plugin_decoder = TRY_OR_FAIL(Gfx::TIFFImageDecoderPlugin::create(file->bytes()));
auto frame = TRY_OR_FAIL(expect_single_frame_of_size(*plugin_decoder, { 400, 300 }));
EXPECT_EQ(frame.image->get_pixel(0, 0), Gfx::Color::NamedColor::White);
EXPECT_EQ(frame.image->get_pixel(60, 75), Gfx::Color::NamedColor::Red);
}
TEST_CASE(test_tiff_deflate)
{
auto file = TRY_OR_FAIL(Core::MappedFile::map(TEST_INPUT("tiff/deflate.tiff"sv)));
EXPECT(Gfx::TIFFImageDecoderPlugin::sniff(file->bytes()));
auto plugin_decoder = TRY_OR_FAIL(Gfx::TIFFImageDecoderPlugin::create(file->bytes()));
auto frame = TRY_OR_FAIL(expect_single_frame_of_size(*plugin_decoder, { 400, 300 }));
EXPECT_EQ(frame.image->get_pixel(0, 0), Gfx::Color::NamedColor::White);
EXPECT_EQ(frame.image->get_pixel(60, 75), Gfx::Color::NamedColor::Red);
}
TEST_CASE(test_tiff_krita)
{
auto file = TRY_OR_FAIL(Core::MappedFile::map(TEST_INPUT("tiff/krita.tif"sv)));
EXPECT(Gfx::TIFFImageDecoderPlugin::sniff(file->bytes()));
auto plugin_decoder = TRY_OR_FAIL(Gfx::TIFFImageDecoderPlugin::create(file->bytes()));
auto frame = TRY_OR_FAIL(expect_single_frame_of_size(*plugin_decoder, { 400, 300 }));
EXPECT_EQ(frame.image->get_pixel(0, 0), Gfx::Color::NamedColor::White);
EXPECT_EQ(frame.image->get_pixel(60, 75), Gfx::Color::NamedColor::Red);
}
TEST_CASE(test_tiff_orientation)
{
auto file = TRY_OR_FAIL(Core::MappedFile::map(TEST_INPUT("tiff/orientation.tiff"sv)));
EXPECT(Gfx::TIFFImageDecoderPlugin::sniff(file->bytes()));
auto plugin_decoder = TRY_OR_FAIL(Gfx::TIFFImageDecoderPlugin::create(file->bytes()));
auto frame = TRY_OR_FAIL(expect_single_frame_of_size(*plugin_decoder, { 300, 400 }));
// Orientation is Rotate90Clockwise
EXPECT_EQ(frame.image->get_pixel(0, 0), Gfx::Color::NamedColor::White);
EXPECT_EQ(frame.image->get_pixel(300 - 75, 60), Gfx::Color::NamedColor::Red);
}
TEST_CASE(test_tiff_packed_bits)
{
auto file = TRY_OR_FAIL(Core::MappedFile::map(TEST_INPUT("tiff/packed_bits.tiff"sv)));
EXPECT(Gfx::TIFFImageDecoderPlugin::sniff(file->bytes()));
auto plugin_decoder = TRY_OR_FAIL(Gfx::TIFFImageDecoderPlugin::create(file->bytes()));
auto frame = TRY_OR_FAIL(expect_single_frame_of_size(*plugin_decoder, { 400, 300 }));
EXPECT_EQ(frame.image->get_pixel(0, 0), Gfx::Color::NamedColor::White);
EXPECT_EQ(frame.image->get_pixel(60, 75), Gfx::Color::NamedColor::Red);
}
TEST_CASE(test_tiff_grayscale)
{
auto file = TRY_OR_FAIL(Core::MappedFile::map(TEST_INPUT("tiff/grayscale.tiff"sv)));
EXPECT(Gfx::TIFFImageDecoderPlugin::sniff(file->bytes()));
auto plugin_decoder = TRY_OR_FAIL(Gfx::TIFFImageDecoderPlugin::create(file->bytes()));
auto frame = TRY_OR_FAIL(expect_single_frame_of_size(*plugin_decoder, { 400, 300 }));
EXPECT_EQ(frame.image->get_pixel(0, 0), Gfx::Color::NamedColor::White);
EXPECT_EQ(frame.image->get_pixel(60, 75), Gfx::Color(130, 130, 130));
}
TEST_CASE(test_tiff_grayscale_alpha)
{
auto file = TRY_OR_FAIL(Core::MappedFile::map(TEST_INPUT("tiff/grayscale_alpha.tiff"sv)));
EXPECT(Gfx::TIFFImageDecoderPlugin::sniff(file->bytes()));
auto plugin_decoder = TRY_OR_FAIL(Gfx::TIFFImageDecoderPlugin::create(file->bytes()));
auto frame = TRY_OR_FAIL(expect_single_frame_of_size(*plugin_decoder, { 400, 300 }));
EXPECT_EQ(frame.image->get_pixel(0, 0).alpha(), 0);
EXPECT_EQ(frame.image->get_pixel(60, 75), Gfx::Color(130, 130, 130));
}
TEST_CASE(test_tiff_rgb_alpha)
{
auto file = TRY_OR_FAIL(Core::MappedFile::map(TEST_INPUT("tiff/rgb_alpha.tiff"sv)));
EXPECT(Gfx::TIFFImageDecoderPlugin::sniff(file->bytes()));
auto plugin_decoder = TRY_OR_FAIL(Gfx::TIFFImageDecoderPlugin::create(file->bytes()));
auto frame = TRY_OR_FAIL(expect_single_frame_of_size(*plugin_decoder, { 400, 300 }));
EXPECT_EQ(frame.image->get_pixel(0, 0).alpha(), 0);
EXPECT_EQ(frame.image->get_pixel(60, 75), Gfx::Color::NamedColor::Red);
}
TEST_CASE(test_tiff_palette_alpha)
{
auto file = TRY_OR_FAIL(Core::MappedFile::map(TEST_INPUT("tiff/rgb_palette_alpha.tiff"sv)));
EXPECT(Gfx::TIFFImageDecoderPlugin::sniff(file->bytes()));
auto plugin_decoder = TRY_OR_FAIL(Gfx::TIFFImageDecoderPlugin::create(file->bytes()));
auto frame = TRY_OR_FAIL(expect_single_frame_of_size(*plugin_decoder, { 400, 300 }));
EXPECT_EQ(frame.image->get_pixel(0, 0).alpha(), 0);
EXPECT_EQ(frame.image->get_pixel(60, 75), Gfx::Color::NamedColor::Red);
}
TEST_CASE(test_tiff_alpha_predictor)
{
auto file = TRY_OR_FAIL(Core::MappedFile::map(TEST_INPUT("tiff/alpha_predictor.tiff"sv)));
EXPECT(Gfx::TIFFImageDecoderPlugin::sniff(file->bytes()));
auto plugin_decoder = TRY_OR_FAIL(Gfx::TIFFImageDecoderPlugin::create(file->bytes()));
auto frame = TRY_OR_FAIL(expect_single_frame_of_size(*plugin_decoder, { 400, 300 }));
EXPECT_EQ(frame.image->get_pixel(0, 0).alpha(), 255);
EXPECT_EQ(frame.image->get_pixel(60, 75), Gfx::Color::NamedColor::Red);
}
TEST_CASE(test_tiff_16_bits)
{
auto file = TRY_OR_FAIL(Core::MappedFile::map(TEST_INPUT("tiff/16_bits.tiff"sv)));
EXPECT(Gfx::TIFFImageDecoderPlugin::sniff(file->bytes()));
auto plugin_decoder = TRY_OR_FAIL(Gfx::TIFFImageDecoderPlugin::create(file->bytes()));
auto frame = TRY_OR_FAIL(expect_single_frame_of_size(*plugin_decoder, { 400, 300 }));
EXPECT_EQ(frame.image->get_pixel(0, 0), Gfx::Color::NamedColor::White);
EXPECT_EQ(frame.image->get_pixel(60, 75), Gfx::Color::NamedColor::Red);
}
TEST_CASE(test_tiff_cmyk)
{
auto file = TRY_OR_FAIL(Core::MappedFile::map(TEST_INPUT("tiff/cmyk.tiff"sv)));
EXPECT(Gfx::TIFFImageDecoderPlugin::sniff(file->bytes()));
auto plugin_decoder = TRY_OR_FAIL(Gfx::TIFFImageDecoderPlugin::create(file->bytes()));
auto frame = TRY_OR_FAIL(expect_single_frame_of_size(*plugin_decoder, { 400, 300 }));
EXPECT_EQ(frame.image->get_pixel(0, 0), Gfx::Color::NamedColor::White);
// I stripped the ICC profile from the image, so we can't test for equality with Red here.
EXPECT_NE(frame.image->get_pixel(60, 75), Gfx::Color::NamedColor::White);
}
TEST_CASE(test_tiff_tiled)
{
auto file = TRY_OR_FAIL(Core::MappedFile::map(TEST_INPUT("tiff/tiled.tiff"sv)));
EXPECT(Gfx::TIFFImageDecoderPlugin::sniff(file->bytes()));
auto plugin_decoder = TRY_OR_FAIL(Gfx::TIFFImageDecoderPlugin::create(file->bytes()));
auto frame = TRY_OR_FAIL(expect_single_frame_of_size(*plugin_decoder, { 400, 300 }));
EXPECT_EQ(frame.image->get_pixel(0, 0), Gfx::Color::NamedColor::White);
EXPECT_EQ(frame.image->get_pixel(60, 75), Gfx::Color::NamedColor::Red);
}
TEST_CASE(test_tiff_invalid_tag)
{
auto file = TRY_OR_FAIL(Core::MappedFile::map(TEST_INPUT("tiff/invalid_tag.tiff"sv)));
EXPECT(Gfx::TIFFImageDecoderPlugin::sniff(file->bytes()));
auto plugin_decoder = TRY_OR_FAIL(Gfx::TIFFImageDecoderPlugin::create(file->bytes()));
auto frame = TRY_OR_FAIL(expect_single_frame_of_size(*plugin_decoder, { 10, 10 }));
EXPECT_EQ(frame.image->get_pixel(0, 0), Gfx::Color::NamedColor::Black);
EXPECT_EQ(frame.image->get_pixel(0, 9), Gfx::Color::NamedColor::White);
}
TEST_CASE(test_webp_simple_lossy)
{
auto file = TRY_OR_FAIL(Core::MappedFile::map(TEST_INPUT("webp/simple-vp8.webp"sv)));

View file

@ -1,2 +1 @@
GIF: loaded, width=1, height=1
TIFF: loaded, width=1, height=1

View file

@ -4,7 +4,6 @@
asyncTest(async done => {
const sources = [
{ format: "GIF", src: "data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" },
{ format: "TIFF", src: "data:image/tiff;base64,SUkqAAwAAACAACAgCQAAAQMAAQAAAAEAAAABAQMAAQAAAAEAAAACAQMAAQAAAAgAAAADAQMAAQAAAAUAAAAGAQMAAQAAAAEAAAARAQQAAQAAAAgAAAAWAQMAAQAAAAEAAAAXAQQAAQAAAAMAAAAcAQMAAQAAAAEAAAAAAAAA" },
];
for (const { format, src } of sources) {
await new Promise(resolve => {