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JPGLoader: Move JPGLoader internal structs and #defines to JPGLoader.cpp

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devashish 2020-06-22 22:40:20 +05:30 • committed by Andreas Kling
parent a8b00780a8
commit 4b19b99b36
2 changed files with 152 additions and 150 deletions
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151
Libraries/LibGfx/JPGLoader.cpp
View file

@ -40,6 +40,60 @@
if (JPG_DBG) \
dbg() << x
#define JPG_INVALID 0X0000
#define JPG_APPN0 0XFFE0
#define JPG_APPN1 0XFFE1
#define JPG_APPN2 0XFFE2
#define JPG_APPN3 0XFFE3
#define JPG_APPN4 0XFFE4
#define JPG_APPN5 0XFFE5
#define JPG_APPN6 0XFFE6
#define JPG_APPN7 0XFFE7
#define JPG_APPN8 0XFFE8
#define JPG_APPN9 0XFFE9
#define JPG_APPNA 0XFFEA
#define JPG_APPNB 0XFFEB
#define JPG_APPNC 0XFFEC
#define JPG_APPND 0XFFED
#define JPG_APPNE 0xFFEE
#define JPG_APPNF 0xFFEF
#define JPG_RESERVED1 0xFFF1
#define JPG_RESERVED2 0xFFF2
#define JPG_RESERVED3 0xFFF3
#define JPG_RESERVED4 0xFFF4
#define JPG_RESERVED5 0xFFF5
#define JPG_RESERVED6 0xFFF6
#define JPG_RESERVED7 0xFFF7
#define JPG_RESERVED8 0xFFF8
#define JPG_RESERVED9 0xFFF9
#define JPG_RESERVEDA 0xFFFA
#define JPG_RESERVEDB 0xFFFB
#define JPG_RESERVEDC 0xFFFC
#define JPG_RESERVEDD 0xFFFD
#define JPG_RST0 0xFFD0
#define JPG_RST1 0xFFD1
#define JPG_RST2 0xFFD2
#define JPG_RST3 0xFFD3
#define JPG_RST4 0xFFD4
#define JPG_RST5 0xFFD5
#define JPG_RST6 0xFFD6
#define JPG_RST7 0xFFD7
#define JPG_DHP 0xFFDE
#define JPG_EXP 0xFFDF
#define JPG_DHT 0XFFC4
#define JPG_DQT 0XFFDB
#define JPG_EOI 0xFFD9
#define JPG_RST 0XFFDD
#define JPG_SOF0 0XFFC0
#define JPG_SOI 0XFFD8
#define JPG_SOS 0XFFDA
#define JPG_COM 0xFFFE
namespace Gfx {
constexpr static u8 zigzag_map[64] {
@ -55,6 +109,103 @@ constexpr static u8 zigzag_map[64] {
using Marker = u16;
/**
* MCU means group of data units that are coded together. A data unit is an 8x8
* block of component data. In interleaved scans, number of non-interleaved data
* units of a component C is Ch * Cv, where Ch and Cv represent the horizontal &
* vertical subsampling factors of the component, respectively. A MacroBlock is
* an 8x8 block of RGB values before encoding, and 8x8 block of YCbCr values when
* we're done decoding the huffman stream.
*/
struct Macroblock {
union {
i32 y[64] = { 0 };
i32 r[64];
};
union {
i32 cb[64] = { 0 };
i32 g[64];
};
union {
i32 cr[64] = { 0 };
i32 b[64];
};
};
struct MacroblockMeta {
u32 total;
u32 padded_total;
u32 hcount;
u32 vcount;
u32 hpadded_count;
u32 vpadded_count;
};
struct ComponentSpec {
i8 id { -1 };
u8 hsample_factor { 1 }; // Horizontal sampling factor.
u8 vsample_factor { 1 }; // Vertical sampling factor.
u8 ac_destination_id;
u8 dc_destination_id;
u8 qtable_id; // Quantization table id.
};
struct StartOfFrame {
enum class FrameType {
Baseline = 0
// Progressive = 1
};
FrameType type { FrameType::Baseline };
u8 precision;
u16 height;
u16 width;
};
struct HuffmanTableSpec {
u8 type;
u8 destination_id;
u8 code_counts[16] = { 0 };
Vector<u8> symbols;
Vector<u16> codes;
};
struct HuffmanStreamState {
Vector<u8> stream;
u8 bit_offset { 0 };
size_t byte_offset { 0 };
};
struct JPGLoadingContext {
enum State {
NotDecoded = 0,
Error,
FrameDecoded,
BitmapDecoded
};
State state { State::NotDecoded };
const u8* data { nullptr };
size_t data_size { 0 };
u32 luma_table[64];
u32 chroma_table[64];
StartOfFrame frame;
u8 hsample_factor;
u8 vsample_factor;
bool has_zero_based_ids;
u8 component_count;
ComponentSpec components[3];
RefPtr<Gfx::Bitmap> bitmap;
u16 dc_reset_interval;
Vector<HuffmanTableSpec> dc_tables;
Vector<HuffmanTableSpec> ac_tables;
HuffmanStreamState huffman_stream;
i32 previous_dc_values[3] = { 0 };
MacroblockMeta mblock_meta;
};
void generate_huffman_codes(HuffmanTableSpec& table)
{
unsigned code = 0;

151
Libraries/LibGfx/JPGLoader.h
View file

@ -31,161 +31,12 @@
#include <LibGfx/ImageDecoder.h>
#include <LibGfx/Size.h>
#define JPG_INVALID 0X0000
#define JPG_APPN0 0XFFE0
#define JPG_APPN1 0XFFE1
#define JPG_APPN2 0XFFE2
#define JPG_APPN3 0XFFE3
#define JPG_APPN4 0XFFE4
#define JPG_APPN5 0XFFE5
#define JPG_APPN6 0XFFE6
#define JPG_APPN7 0XFFE7
#define JPG_APPN8 0XFFE8
#define JPG_APPN9 0XFFE9
#define JPG_APPNA 0XFFEA
#define JPG_APPNB 0XFFEB
#define JPG_APPNC 0XFFEC
#define JPG_APPND 0XFFED
#define JPG_APPNE 0xFFEE
#define JPG_APPNF 0xFFEF
#define JPG_RESERVED1 0xFFF1
#define JPG_RESERVED2 0xFFF2
#define JPG_RESERVED3 0xFFF3
#define JPG_RESERVED4 0xFFF4
#define JPG_RESERVED5 0xFFF5
#define JPG_RESERVED6 0xFFF6
#define JPG_RESERVED7 0xFFF7
#define JPG_RESERVED8 0xFFF8
#define JPG_RESERVED9 0xFFF9
#define JPG_RESERVEDA 0xFFFA
#define JPG_RESERVEDB 0xFFFB
#define JPG_RESERVEDC 0xFFFC
#define JPG_RESERVEDD 0xFFFD
#define JPG_RST0 0xFFD0
#define JPG_RST1 0xFFD1
#define JPG_RST2 0xFFD2
#define JPG_RST3 0xFFD3
#define JPG_RST4 0xFFD4
#define JPG_RST5 0xFFD5
#define JPG_RST6 0xFFD6
#define JPG_RST7 0xFFD7
#define JPG_DHP 0xFFDE
#define JPG_EXP 0xFFDF
#define JPG_DHT 0XFFC4
#define JPG_DQT 0XFFDB
#define JPG_EOI 0xFFD9
#define JPG_RST 0XFFDD
#define JPG_SOF0 0XFFC0
#define JPG_SOI 0XFFD8
#define JPG_SOS 0XFFDA
#define JPG_COM 0xFFFE
namespace Gfx {
RefPtr<Gfx::Bitmap> load_jpg(const StringView& path);
RefPtr<Gfx::Bitmap> load_jpg_from_memory(const u8* data, size_t length);
/**
* MCU means group of data units that are coded together. A data unit is an 8x8
* block of component data. In interleaved scans, number of non-interleaved data
* units of a component C is Ch * Cv, where Ch and Cv represent the horizontal &
* vertical subsampling factors of the component, respectively. A MacroBlock is
* an 8x8 block of RGB values before encoding, and 8x8 block of YCbCr values when
* we're done decoding the huffman stream.
*/
struct Macroblock {
union {
i32 y[64] = { 0 };
i32 r[64];
};
union {
i32 cb[64] = { 0 };
i32 g[64];
};
union {
i32 cr[64] = { 0 };
i32 b[64];
};
};
struct MacroblockMeta {
u32 total;
u32 padded_total;
u32 hcount;
u32 vcount;
u32 hpadded_count;
u32 vpadded_count;
};
struct ComponentSpec {
i8 id { -1 };
u8 hsample_factor { 1 }; // Horizontal sampling factor.
u8 vsample_factor { 1 }; // Vertical sampling factor.
u8 ac_destination_id;
u8 dc_destination_id;
u8 qtable_id; // Quantization table id.
};
struct StartOfFrame {
enum class FrameType {
Baseline = 0
// Progressive = 1
};
FrameType type { FrameType::Baseline };
u8 precision;
u16 height;
u16 width;
};
struct HuffmanTableSpec {
u8 type;
u8 destination_id;
u8 code_counts[16] = { 0 };
Vector<u8> symbols;
Vector<u16> codes;
};
struct HuffmanStreamState {
Vector<u8> stream;
u8 bit_offset { 0 };
size_t byte_offset { 0 };
};
struct JPGLoadingContext {
enum State {
NotDecoded = 0,
Error,
FrameDecoded,
BitmapDecoded
};
State state { State::NotDecoded };
const u8* data { nullptr };
size_t data_size { 0 };
u32 luma_table[64];
u32 chroma_table[64];
StartOfFrame frame;
u8 hsample_factor;
u8 vsample_factor;
bool has_zero_based_ids;
u8 component_count;
ComponentSpec components[3];
RefPtr<Gfx::Bitmap> bitmap;
u16 dc_reset_interval;
Vector<HuffmanTableSpec> dc_tables;
Vector<HuffmanTableSpec> ac_tables;
HuffmanStreamState huffman_stream;
i32 previous_dc_values[3] = { 0 };
MacroblockMeta mblock_meta;
};
struct JPGLoadingContext;
class JPGImageDecoderPlugin : public ImageDecoderPlugin {
public: