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This is the format for resources of type GFXRES (these have the extension
.ani in the original source).
Everything is stored MSB first unless otherwise specified.
position length meaning
4 0xffffffff if the file is uncompressed.
Otherwise, the file is compressed. When uncompressed, the
file complies with the rest of the format as described
below.
4 Unused in file, always 0x00000000
4 FlagsAndIndex:
bits 0-11: 1 less than the number of frames in this
graphics resource
bits 12-15: flags:
- bit 0: (WANT_MASK)
- bit 1: (WANT_PIXMAP)
- bit 2: (WANT_COMPRESSED)
- bit 3: (DOUBLE_RES)
bits 16-31: unknown (0x0000)
Frame descriptions:
Then for all frames:
4 Type index and flags (TypeIndexAndFlags)
Low 2 bytes:
bits 0-11 is the index of this frame
bits 12-15 are the type flags:
- bit 12-13:
- 0: (ROM_DRAWABLE)
- 1: Direct drawable (RAM_DRAWABLE)
- 2: (SCREEN_DRAWABLE)
- 3: (OVERLAY_DRAWABLE)
High 2 bytes (frame flags):
- bits 0-7: global PLUT to use
- bit 12: Frame is in cel format (DATA_HARDWARE)
- bit 13: (DATA_COPY aka DATA_SCREEN)
- bit 14: (DATA_PACKED)
- bit 15: (X_FLIP)
4 Hot spot information (definition of (0, 0) in the image):
- low 2 bytes: x location of hot spot
- high 2 bytes: y location of hot spot
4 Image bounds:
- low 2 bytes: Image width
- low 2 bytes: Image height
4 Offset from beginning of the frame description for this
frame to the beginning of the frame.
Frames:
Then for all frames:
If DATA_HARDWARE is set in the flags for this frame:
4 Size of image data
? .cel image data
If DATA_PACKED is set in the flags for this frame: (from 3do/imageint.c)
for every line in the image (bounds.height lines):
2 number of bytes used to encode this line
The actual number of bytes is computed like so:
(number-of-bytes + 2) * 4
a number of packets of this format:
Initial version 2002-10-22, by Serge van den Boom
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