Public Attributes
std::vector< uint8_t >	data

bool	is_compressed = false

bool	decompression_succeeded = false

bool	is_bpp3 = false

uint32_t	pc_offset = 0

Detailed Description

Loads all 223 graphics sheets from the ROM into bitmap format.

ALTTP uses 223 graphics sheets (kNumGfxSheets) stored in three formats:

Sheet Categories:

Sheets 0-112: Compressed 3BPP (overworld, dungeons, sprites)
Sheets 113-114: 2BPP sheets (skipped here, loaded separately)
Sheets 115-126: Uncompressed 3BPP (special graphics)
Sheets 127-217: Compressed 3BPP (additional graphics)
Sheets 218+: 2BPP sheets (skipped here)

Compression Format: Graphics data is compressed using Nintendo's LC-LZ2 algorithm. Each sheet is decompressed to a 0x800 (2048) byte buffer, then converted from SNES planar format to linear 8BPP for easier manipulation.

Graphics Buffer: All sheet data is also appended to data.graphics_buffer for legacy compatibility. Sheets that fail to load are filled with 0xFF bytes to maintain correct indexing.

Parameters

rom	The loaded ROM to read graphics from
data	The GameData structure to populate with graphics

Returns: OkStatus on success, or error status

Warning: The DecompressV2 size parameter MUST be 0x800, not 0. Passing size=0 causes immediate return of empty data, which was a regression bug that caused all graphics to appear as solid purple/brown (0xFF fill).

Definition at line 340 of file game_data.cc.