Degas - Revision history

Ivo: category atari st image formats

2008-05-02T00:35:56Z

category atari st image formats

← Older revision		Revision as of 17:35, 1 May 2008
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	[[Category:Image Formats]]		[[Category:Image Formats]]
			[[Category:Atari ST Image Formats]]

2008-05-02T00:35:18Z

forget about plainlinks an be consistent with the rest of the wiki

← Older revision		Revision as of 17:35, 1 May 2008
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	~~<span class="plainlinks">~~
	* Company: [[Integral Solutions]]		* Company: [[Integral Solutions]]
	* Extensions: .pi1, .pi2, .pi3, .pc1, .pc2, .pc3		* Extensions: .pi1, .pi2, .pi3, .pc1, .pc2, .pc3
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	[[Image:Atarist_lowres.png]]		[[Image:Atarist_lowres.png]]

	~~[[Category:Atari ST Image Formats]]~~
	[[Category:Image Formats]]		[[Category:Image Formats]]
	~~</span>~~

2008-05-02T00:18:38Z

category atari st image formats

← Older revision		Revision as of 17:18, 1 May 2008
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	[[Image:Atarist_lowres.png]]		[[Image:Atarist_lowres.png]]

			[[Category:Atari ST Image Formats]]
	[[Category:Image Formats]]		[[Category:Image Formats]]
	</span>		</span>

2008-04-27T16:11:51Z

describe video data format

← Older revision		Revision as of 09:11, 27 April 2008
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	A standard [http://en.wikipedia.org/wiki/Atari_ST Atari ST] has a 9-bit DAC, which results in 512 colors.		A standard [http://en.wikipedia.org/wiki/Atari_ST Atari ST] has a 9-bit DAC, which results in 512 colors.

			==Image Data==

			The image data is stored in a planar format.

			[[Image:Atarist_lowres.png]]

	[[Category:Image Formats]]		[[Category:Image Formats]]
	</span>		</span>

2008-04-27T15:21:38Z

revert image data definition back to uint16 because of how the data is ordered

← Older revision		Revision as of 08:21, 27 April 2008
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	uint16_t resolution; /* 0 = low res (320x200x16), 1 = medium res (640x200x4), 2 = high res (640x400x2) */		uint16_t resolution; /* 0 = low res (320x200x16), 1 = medium res (640x200x4), 2 = high res (640x400x2) */
	uint16_t hardware_palette[16];		uint16_t hardware_palette[16];
	~~uint8_t~~ data[~~32000~~];		uint16_t data[16000];
	} DEGASFile;		} DEGASFile;

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	uint16_t resolution; /* see above */		uint16_t resolution; /* see above */
	uint16_t hardware_palette[16];		uint16_t hardware_palette[16];
	~~uint8_t~~ data[~~32000~~];		uint16_t data[16000];
	uint16_t left_color_animation[4];		uint16_t left_color_animation[4];
	uint16_t right_color_animation[4];		uint16_t right_color_animation[4];

2008-04-27T13:10:20Z

words are big-endian

← Older revision		Revision as of 06:10, 27 April 2008
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	'''DEGAS''' (short for ''Design & Entertainment Graphic Arts System'') and '''DEGAS Elite''' were image drawing programs for the [http://en.wikipedia.org/wiki/Atari_ST Atari ST].		'''DEGAS''' (short for ''Design & Entertainment Graphic Arts System'') and '''DEGAS Elite''' were image drawing programs for the [http://en.wikipedia.org/wiki/Atari_ST Atari ST].

			16-bit words are stored in big-endian order.

	__TOC__		__TOC__

2008-04-27T13:08:42Z

image data as uint8

2008-04-27T01:27:18Z

consistent us spelling

← Older revision		Revision as of 18:27, 26 April 2008
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	0000 0rrr 0ggg 0bbb		0000 0rrr 0ggg 0bbb

	A standard [http://en.wikipedia.org/wiki/Atari_ST Atari ST] has a 9-bit DAC, which results in 512 ~~colours~~.		A standard [http://en.wikipedia.org/wiki/Atari_ST Atari ST] has a 9-bit DAC, which results in 512 colors.

	[[Category:Image Formats]]		[[Category:Image Formats]]
	</span>		</span>

2008-04-27T01:24:51Z

external plainlinks for atari st

← Older revision		Revision as of 18:24, 26 April 2008
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			<span class="plainlinks">
	* Company: [[Integral Solutions]]		* Company: [[Integral Solutions]]
	* Extensions: .pi1, .pi2, .pi3, .pc1, .pc2, .pc3		* Extensions: .pi1, .pi2, .pi3, .pc1, .pc2, .pc3

	'''DEGAS''' (short for ''Design & Entertainment Graphic Arts System'') and '''DEGAS Elite''' were image drawing programs for the [[Atari ST]].		'''DEGAS''' (short for ''Design & Entertainment Graphic Arts System'') and '''DEGAS Elite''' were image drawing programs for the [http://en.wikipedia.org/wiki/Atari_ST Atari ST].

	__TOC__		__TOC__
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	==Hardware Palette==		==Hardware Palette==

	The Atari ST has 16 16-bits hardware palette registers. All 16 colors are always stored, even if the resolution does not use them all.		The [http://en.wikipedia.org/wiki/Atari_ST Atari ST] has 16 16-bits hardware palette registers. All 16 colors are always stored, even if the resolution does not use them all.
	Each color is specified as:		Each color is specified as:

	0000 0rrr 0ggg 0bbb		0000 0rrr 0ggg 0bbb

	A standard Atari ST has a 9-bit DAC, which results in 512 colours.		A standard [http://en.wikipedia.org/wiki/Atari_ST Atari ST] has a 9-bit DAC, which results in 512 colours.

	[[Category:Image Formats]]		[[Category:Image Formats]]
			</span>

2008-04-27T01:19:45Z

palette information

← Older revision		Revision as of 18:19, 26 April 2008
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	* Each scanline is compressed separately		* Each scanline is compressed separately
	* For every scanline, each bit plane is compressed separately, starting with the least significant bits		* For every scanline, each bit plane is compressed separately, starting with the least significant bits

			==Hardware Palette==

			The Atari ST has 16 16-bits hardware palette registers. All 16 colors are always stored, even if the resolution does not use them all.
			Each color is specified as:

			0000 0rrr 0ggg 0bbb

			A standard Atari ST has a 9-bit DAC, which results in 512 colours.

	[[Category:Image Formats]]		[[Category:Image Formats]]

← Older revision		Revision as of 06:08, 27 April 2008
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	uint16_t resolution; /* 0 = low res (320x200x16), 1 = medium res (640x200x4), 2 = high res (640x400x2) */		uint16_t resolution; /* 0 = low res (320x200x16), 1 = medium res (640x200x4), 2 = high res (640x400x2) */
	uint16_t hardware_palette[16];		uint16_t hardware_palette[16];
	~~uint16_t~~ data[~~16000~~];		uint8_t data[32000];
	} DEGASFile;		} DEGASFile;

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	uint16_t resolution; /* see above */		uint16_t resolution; /* see above */
	uint16_t hardware_palette[16];		uint16_t hardware_palette[16];
	~~uint16_t~~ data[~~16000~~];		uint8_t data[32000];
	uint16_t left_color_animation[4];		uint16_t left_color_animation[4];
	uint16_t right_color_animation[4];		uint16_t right_color_animation[4];
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	uint16_t resolution; /* see above */		uint16_t resolution; /* see above */
	uint16_t hardware_palette[16];		uint16_t hardware_palette[16];
	~~uint16_t~~ data[]; /* size depends on compression ratio */		uint8_t data[]; /* size depends on compression ratio */
	uint16_t left_color_animation[4];		uint16_t left_color_animation[4];
	uint16_t right_color_animation[4];		uint16_t right_color_animation[4];