Texture format - Revision history

Halamix2 at 17:14, 26 October 2022

2022-10-26T17:14:31Z

← Older revision		Revision as of 17:14, 26 October 2022
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	=== Version 2 (PS2) ===		=== Version 2 (PS2) ===

	* Paletted image. Instead of first uncompressed pixel at 0xA it ~~have~~ short with number of ~~paletted~~ colours, ~~than~~ list of colours (~~argb~~, 4 bytes per colour), and uncompressed paletted image (1 byte per pixel)		* Paletted image. Instead of first uncompressed pixel at 0xA it has an unsigned short with number of colours in a palette, then a list of colours (ARGB, 4 bytes per colour), and an uncompressed paletted image (1 byte per pixel)

	=== Version 3 (PC) ===		=== Version 3 (PC) ===

Halamix2: /* Unpacked image data (PC and DC) */

2021-01-04T21:15:48Z

Unpacked image data (PC and DC)

← Older revision		Revision as of 21:15, 4 January 2021
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	* Same as version 3, with red and blue channels swapped		* Same as version 3, with red and blue channels swapped

	=== Unpacked image data (~~PC and DC~~) ===		=== Unpacked image data (versions 3-5) ===
	Uncompressed image data uses 2 bytes for each pixel, in A1 R5 G5 B5 format. In some places game uses additional file with greyscale alpha channel to compensate for 1bit alpha (5 bits instead of 1).		Uncompressed image data uses 2 bytes for each pixel, in A1 R5 G5 B5 format. In some places game uses additional file with greyscale alpha channel to compensate for 1bit alpha (5 bits instead of 1).

Halamix2 at 21:09, 3 January 2021

2021-01-03T21:09:30Z

← Older revision		Revision as of 21:09, 3 January 2021
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	\|0x4		\|0x4
	\|0x2		\|0x2
	\|version, ~~set to~~ 2 ~~for .ps2 files, 3 for .pc, 4 for .dc,~~ 5 ~~for .ps2 (w. aplha?)~~		\|version, number 2-5
	\|-		\|-
	\|0x6		\|0x6

Halamix2: /* Version 4 (DC) */

2021-01-03T21:08:57Z

Version 4 (DC)

← Older revision		Revision as of 21:08, 3 January 2021
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	=== Version 4 (DC) ===		=== Version 4 (DC) ===

	* ~~Uses the same compression~~ as version 3, but the resulting files are swizzled for Dreamcast GPU, so untwiddling is needed		* Same as version 3, but the resulting files are swizzled for Dreamcast GPU, so untwiddling is needed

	=== Version 5 (PS2) ===		=== Version 5 (PS2) ===

Halamix2: /* Version 5(PS2) */

2021-01-03T19:40:36Z

Version 5(PS2)

← Older revision		Revision as of 19:40, 3 January 2021
Line 52:		Line 52:
	* Uses the same compression as version 3, but the resulting files are swizzled for Dreamcast GPU, so untwiddling is needed		* Uses the same compression as version 3, but the resulting files are swizzled for Dreamcast GPU, so untwiddling is needed

	=== Version 5(PS2) ===		=== Version 5 (PS2) ===

	* Same as version 3, with red and blue channels swapped		* Same as version 3, with red and blue channels swapped

Halamix2: /* Version 2 (PS2) */

2021-01-03T19:40:19Z

Version 2 (PS2)

← Older revision		Revision as of 19:40, 3 January 2021
Line 34:		Line 34:
	=== Version 2 (PS2) ===		=== Version 2 (PS2) ===

	* ~~Not much is known~~, ~~other that it's vastly different to PC & DC versions~~		* Paletted image. Instead of first uncompressed pixel at 0xA it have short with number of paletted colours, than list of colours (argb, 4 bytes per colour), and uncompressed paletted image (1 byte per pixel)

	=== Version 3 (PC) ===		=== Version 3 (PC) ===

Halamix2 at 15:19, 3 January 2021

2021-01-03T15:19:18Z

← Older revision		Revision as of 15:19, 3 January 2021
Line 54:		Line 54:
	=== Version 5(PS2) ===		=== Version 5(PS2) ===

	* ~~not much is known~~, ~~might also contain alpha channel data~~		* Same as version 3, with red and blue channels swapped

	=== Unpacked image data (PC and DC) ===		=== Unpacked image data (PC and DC) ===
	Uncompressed image data uses 2 bytes for each pixel, in A1 R5 G5 B5 format. In some places game uses additional file with greyscale alpha channel to compensate for 1bit alpha (5 bits instead of 1).		Uncompressed image data uses 2 bytes for each pixel, in A1 R5 G5 B5 format. In some places game uses additional file with greyscale alpha channel to compensate for 1bit alpha (5 bits instead of 1).

Halamix2 at 15:14, 3 January 2021

2021-01-03T15:14:59Z

← Older revision		Revision as of 15:14, 3 January 2021
Line 11:		Line 11:
	\|0x4		\|0x4
	\|0x2		\|0x2
	\|version, set to 2 for .ps2 files, 3 for .pc, 4 for .dc		\|version, set to 2 for .ps2 files, 3 for .pc, 4 for .dc, 5 for .ps2 (w. aplha?)
	\|-		\|-
	\|0x6		\|0x6
Line 50:		Line 50:
	=== Version 4 (DC) ===		=== Version 4 (DC) ===

	* Uses the same compression as ~~vesion~~ 3, but the resulting files are swizzled for Dreamcast ~~GPUI~~, so untwiddling is needed		* Uses the same compression as version 3, but the resulting files are swizzled for Dreamcast GPU, so untwiddling is needed

	=== Unpacked image data ===		=== Version 5(PS2) ===

			* not much is known, might also contain alpha channel data

			=== Unpacked image data (PC and DC) ===
	Uncompressed image data uses 2 bytes for each pixel, in A1 R5 G5 B5 format. In some places game uses additional file with greyscale alpha channel to compensate for 1bit alpha (5 bits instead of 1).		Uncompressed image data uses 2 bytes for each pixel, in A1 R5 G5 B5 format. In some places game uses additional file with greyscale alpha channel to compensate for 1bit alpha (5 bits instead of 1).

Halamix2 at 14:27, 3 January 2021

2021-01-03T14:27:50Z

← Older revision		Revision as of 14:27, 3 January 2021
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	Engine supports maximum size of 256x256 pixels. On Windows textures use .pc extension, on Dreamcast they use .DC extension		Engine supports maximum size of 256x256 pixels. On Windows textures use .pc extension, on Dreamcast they use .DC extension, and on Playstation2 they use .ps2 extension
	{\| class="wikitable"		{\| class="wikitable"
	!Offset		!Offset
Line 11:		Line 11:
	\|0x4		\|0x4
	\|0x2		\|0x2
	\|version, set to 3 for .pc ~~files~~, 4 for ~~Dreamcast ones~~		\|version, set to 2 for .ps2 files, 3 for .pc, 4 for .dc
	\|-		\|-
	\|0x6		\|0x6
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	* compressed image data starts at 0xA, see pc_unpack.py for implementation details		* compressed image data starts at 0xA, see pc_unpack.py for implementation details

	=== ~~version~~ 3 (PC) ===		=== Version 2 (PS2) ===

			* Not much is known, other that it's vastly different to PC & DC versions

			=== Version 3 (PC) ===

	* Each pixel is written on 2 bytes, little endian, after converting to big endian the algorithm looks like this:		* Each pixel is written on 2 bytes, little endian, after converting to big endian the algorithm looks like this:

Halamix2: Created page with "Engine supports maximum size of 256x256 pixels. On Windows textures use .pc extension, on Dreamcast they use .DC extension {| class="wikitable" !Offset !Size !Description |- |..."

2020-12-26T16:39:40Z

Created page with "Engine supports maximum size of 256x256 pixels. On Windows textures use .pc extension, on Dreamcast they use .DC extension {| class="wikitable" !Offset !Size !Description |- |..."

New page

Engine supports maximum size of 256x256 pixels. On Windows textures use .pc extension, on Dreamcast they use .DC extension
{| class="wikitable"
!Offset
!Size
!Description
|-
|0x0
|0x4
|Magic, <code>T54 4D 21 1A</code> (<code>TM!\x1A</code>)
|-
|0x4
|0x2
|version, set to 3 for .pc files, 4 for Dreamcast ones
|-
|0x6
|0x2
|width
|-
|0x8
|0x2
|height
|-
|0xA
|0x2
|first pixel
|-
|0xC
|??
|Compressed data, until EOF
|}

* compressed image data starts at 0xA, see pc_unpack.py for implementation details

=== version 3 (PC) ===

* Each pixel is written on 2 bytes, little endian, after converting to big endian the algorithm looks like this:
* If the 15th bit is 1, then stream data as long as each compressed pixel 15th bit is set
** Else
*** If 14th bit is set copy previously unpacked data
**** bits 11-13 - number of pixels to repeat - 2, so if this number is set to 7, then repeat 9 pixels, minimum 2 pixels
**** bits 0-10 - offset - back head for copying that many pixels
**** else - add transparent pixels
***** bits 0-13 - how many transparent pixels to add
* <code>00 00</code> marks the end of compressed data

=== Version 4 (DC) ===

* Uses the same compression as vesion 3, but the resulting files are swizzled for Dreamcast GPUI, so untwiddling is needed

=== Unpacked image data ===
Uncompressed image data uses 2 bytes for each pixel, in A1 R5 G5 B5 format. In some places game uses additional file with greyscale alpha channel to compensate for 1bit alpha (5 bits instead of 1).