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Lagom: Add LibGemini, LibGfx

Browse source 
They are dependencies of LibWeb and might be useful for
running test-web on GitHub actions one day.
This commit is contained in:
Nico Weber 2020-07-23 14:34:53 -04:00 • committed by Andreas Kling
parent c4d9d5cc54
commit 3f45e9ab1e
8 changed files with 179 additions and 22 deletions
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36
Libraries/LibGfx/JPGLoader.cpp
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@ -466,7 +466,7 @@ static inline bool is_valid_marker(const Marker marker)
static inline u16 read_be_word(BufferStream& stream)
{
u8 tmp1, tmp2;
u8 tmp1 = 0, tmp2 = 0;
stream >> tmp1 >> tmp2;
return ((u16)tmp1 << 8) | ((u16)tmp2);
}
@ -505,6 +505,8 @@ static bool read_start_of_scan(BufferStream& stream, JPGLoadingContext& context)
return false;
u8 component_count;
stream >> component_count;
if (stream.handle_read_failure())
return false;
if (component_count != context.component_count) {
dbg() << stream.offset()
<< String::format(": Unsupported number of components: %i!", component_count);
@ -515,6 +517,8 @@ static bool read_start_of_scan(BufferStream& stream, JPGLoadingContext& context)
ComponentSpec* component = nullptr;
u8 component_id;
stream >> component_id;
if (stream.handle_read_failure())
return false;
component_id += context.has_zero_based_ids ? 1 : 0;
if (component_id == context.components[0].id)
@ -530,16 +534,24 @@ static bool read_start_of_scan(BufferStream& stream, JPGLoadingContext& context)
u8 table_ids;
stream >> table_ids;
if (stream.handle_read_failure())
return false;
component->dc_destination_id = table_ids >> 4;
component->ac_destination_id = table_ids & 0x0F;
}
u8 spectral_selection_start;
stream >> spectral_selection_start;
if (stream.handle_read_failure())
return false;
u8 spectral_selection_end;
stream >> spectral_selection_end;
if (stream.handle_read_failure())
return false;
u8 successive_approximation;
stream >> successive_approximation;
if (stream.handle_read_failure())
return false;
// The three values should be fixed for baseline JPEGs utilizing sequential DCT.
if (spectral_selection_start != 0 || spectral_selection_end != 63 || successive_approximation != 0) {
dbg() << stream.offset() << ": ERROR! Start of Selection: " << spectral_selection_start
@ -574,6 +586,8 @@ static bool read_huffman_table(BufferStream& stream, JPGLoadingContext& context)
HuffmanTableSpec table;
u8 table_info;
stream >> table_info;
if (stream.handle_read_failure())
return false;
u8 table_type = table_info >> 4;
u8 table_destination_id = table_info & 0x0F;
if (table_type > 1) {
@ -593,6 +607,8 @@ static bool read_huffman_table(BufferStream& stream, JPGLoadingContext& context)
for (int i = 0; i < 16; i++) {
u8 count;
stream >> count;
if (stream.handle_read_failure())
return false;
total_codes += count;
table.code_counts[i] = count;
}
@ -601,11 +617,14 @@ static bool read_huffman_table(BufferStream& stream, JPGLoadingContext& context)
// Read symbols. Read X bytes, where X is the sum of the counts of codes read in the previous step.
for (u32 i = 0; i < total_codes; i++) {
u8 symbol;
u8 symbol = 0;
stream >> symbol;
table.symbols.append(symbol);
}
if (stream.handle_read_failure())
return false;
if (table_type == 0)
context.dc_tables.append(move(table));
else
@ -690,8 +709,10 @@ static bool read_start_of_frame(BufferStream& stream, JPGLoadingContext& context
context.has_zero_based_ids = component.id == 0;
component.id += context.has_zero_based_ids ? 1 : 0;
u8 subsample_factors;
u8 subsample_factors = 0;
stream >> subsample_factors;
if (stream.handle_read_failure())
return false;
component.hsample_factor = subsample_factors >> 4;
component.vsample_factor = subsample_factors & 0x0F;
@ -732,6 +753,8 @@ static bool read_quantization_table(BufferStream& stream, JPGLoadingContext& con
while (bytes_to_read > 0) {
u8 info_byte;
stream >> info_byte;
if (stream.handle_read_failure())
return false;
u8 element_unit_hint = info_byte >> 4;
if (element_unit_hint > 1) {
dbg() << stream.offset()
@ -746,12 +769,15 @@ static bool read_quantization_table(BufferStream& stream, JPGLoadingContext& con
u32* table = table_id == 0 ? context.luma_table : context.chroma_table;
for (int i = 0; i < 64; i++) {
if (element_unit_hint == 0) {
u8 tmp;
u8 tmp = 0;
stream >> tmp;
table[zigzag_map[i]] = tmp;
} else
table[zigzag_map[i]] = read_be_word(stream);
}
if (stream.handle_read_failure())
return false;
bytes_to_read -= 1 + (element_unit_hint == 0 ? 64 : 128);
}
if (bytes_to_read != 0) {
@ -1081,6 +1107,8 @@ static bool scan_huffman_stream(BufferStream& stream, JPGLoadingContext& context
u8 last_byte;
u8 current_byte;
stream >> current_byte;
if (stream.handle_read_failure())
return false;
for (;;) {
last_byte = current_byte;