CydandClaude Fable 5
db7745fcd0
Un-ignored: the dev drive is the ground truth the restoration and emulator work constantly reference (DPL3/LIBDPL + VRENDER i860 renderer source, BT/RP live+dev game trees, VGL_LABS pod boot, scene/audio content). Kept in-repo for the pod-owner community. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
139 lines
3.4 KiB
C++
139 lines
3.4 KiB
C++
#ifndef divpxmap_h
|
|
#define divpxmap_h
|
|
|
|
#if 0
|
|
|
|
W A R N I N G
|
|
|
|
DONT USE C-comments - this is included by assembly code!
|
|
hence the horrible if 0s
|
|
|
|
pixel map allocation for pazpl5
|
|
#endif
|
|
|
|
#if 0
|
|
|
|
The pixel map has 2 distinct regions, scan-conversion variables and
|
|
shading variables. The scan-conversion variables are written during
|
|
polygon processing. At end-of-frame time some computation is performed,
|
|
and what data is left is shifted into the shading variables.
|
|
|
|
It is important to try to put all 'scalar' information together, so it
|
|
can be sent to pxpl5 in a single operation. The material entry should
|
|
contain a (up to ) 32-bit word of scalar information written in a single
|
|
operation
|
|
|
|
Note that an unpleasant side-effect of the pipelining of texture lookup
|
|
with scan-conversion is that we have to duplicate some information, such
|
|
as r,g,b, specularity, sub-texel coordinates etc. Its the price you pay.
|
|
|
|
NBB we use the z-buffer to perform texture division; this compromises accuracy
|
|
as we only have 20 bits of intermediate precision. In order to buy back 2 more
|
|
bits of precision (to make wrapping of textures not eat up precious bits) we
|
|
actually use 24 bits for the divide. This means that we H A V E to copy
|
|
the 4 bits above the z-buffer into the (now vacant) end-of-frame area, and
|
|
then after the divide copy them back.
|
|
|
|
#endif
|
|
|
|
|
|
#if 0
|
|
i/o area, defined by hardware
|
|
#endif
|
|
|
|
#define dvpx_io 0
|
|
|
|
#if 0
|
|
start of scan-conversion variables
|
|
#endif
|
|
|
|
#define dvpx_iobits 32
|
|
|
|
|
|
|
|
#define dvpx_texz 32
|
|
#define dvpx_texzbits 18
|
|
|
|
#define dvpx_texu 50
|
|
#define dvpx_texubits 18
|
|
|
|
#define dvpx_texv 68
|
|
#define dvpx_texvbits 18
|
|
|
|
#define dvpx_zbuf 86
|
|
#define dvpx_zbufbits 20
|
|
|
|
#define dvpx_opaque_50 106
|
|
#define dvpx_opaque_25 107
|
|
#define dvpx_opaque_12 108
|
|
|
|
|
|
#define dvpx_scalar 109
|
|
#define dvpx_pixcolourtype 109
|
|
|
|
#define dvpx_texsize 110
|
|
#define dvpx_texsizebits 3
|
|
|
|
#define dvpx_texid 113
|
|
#define dvpx_texidbits 8
|
|
|
|
#define dvpx_texrampsel 121
|
|
#define dvpx_texrampselbits 3
|
|
|
|
#define dvpx_intrinsic 124
|
|
#define dvpx_intrinsicbits 9
|
|
|
|
#define dvpx_ks 133
|
|
#define dvpx_ksbits 4
|
|
|
|
#define dvpx_r24 124
|
|
#define dvpx_g24 132
|
|
#define dvpx_diffuse 141
|
|
#define dvpx_diffusebits 8
|
|
#define dvpx_b24 149
|
|
#define dvpx_scalarbits 32
|
|
#define dvpx_specular 149
|
|
#define dvpx_specularbits 8
|
|
|
|
#if 0
|
|
end of scan-conversion variables
|
|
#endif
|
|
|
|
#if 0
|
|
start of end-of-frame variables
|
|
#endif
|
|
|
|
#define dvpx_eofstart 157
|
|
|
|
#define dvpx_eofenblsave 157
|
|
|
|
#define dvpx_eofsubu 158
|
|
#define dvpx_eofsububits 5
|
|
|
|
#define dvpx_eofsubv 163
|
|
#define dvpx_eofsubvbits 5
|
|
|
|
#define dvpx_eofr 168
|
|
#define dvpx_eofrbits 8
|
|
#define dvpx_eofg 176
|
|
#define dvpx_eofgbits 8
|
|
#define dvpx_eofb 184
|
|
#define dvpx_eofbbits 8
|
|
|
|
#define dvpx_eoftexramp 192
|
|
#define dvpx_eoftexrampbits 3
|
|
|
|
#define dvpx_eofspec 195
|
|
#define dvpx_eofspecbits 8
|
|
|
|
#define dvpx_eofpixtype 203
|
|
#define dvpx_eofpixtypebits 2
|
|
|
|
#define dvpx_punchsave 205
|
|
|
|
#define dvpx_eoffog 206
|
|
#define dvpx_eoffogbits 8
|
|
|
|
#else
|
|
#endif
|