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James Dansereau
8f631462f3
D59/D64: the 'external GL DLL' crash was an unbounded blood-RLE write (sentinel die_blood_image_end lost its N64 section adjacency on PC) clobbering the gun-barrel sub-DL at ptr_logo_and_walletbond_DL+0x200. D60: osPiStartDma DMA-target validation (VirtualQuery-based) in libultra.c. D61/D63: TEMP env-gated ROM-read / VTX-pool / menu probes (strip list in HANDOFF Task 3). D62: OSMesgQueue/OSScMsg PC layout verification. D65/D65b: enum HEADS/BODIES signed sentinels under PORT (PC GCC picks unsigned underlying types; N64 semantics were signed). D66: romCopyAligned + ramrom replay 64-bit pointer width (s32 truncation of .bss targets > 4 GiB). D67: struct image_entry N64 layout reconstruction (dataoffset:24 first, all-u32 bitfields, sizeof==8). D68: Globalimagetable BE->LE fixup (port/src/gimgfixup.c): bswap the IMAGESEG-marked Gfx w1 words in the 17 ROM-copied DLs + sImageTableEntry. index in the 32 tables after texReset's romCopy; marker scan moved to bytes 6..7 under PORT; compiled globalDL shadows synced post-texLoad for explosion.c's g_ExplosionDisplayLists. Result: game boots, plays intro music, and renders the entire ~3.5-minute intro (logo -> gun barrel with Brosnan -> cast screen) at ~59 fps. New blocker D69: load_bg_file faults on first stage load - BG-file headers are N64 big-endian segment-0x0F offsets read LE on PC. Full analysis + strategy in PCPortResearch.md §F/D69; HANDOFF rewritten for the D69 session.
37 lines
1.6 KiB
C
37 lines
1.6 KiB
C
#ifndef GIMG_FIXUP_H
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#define GIMG_FIXUP_H
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#include <PR/ultratypes.h>
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/* D68 (docs/PCPortResearch.md): endianness fixup for the Globalimagetable
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* segment after texReset()'s romCopy(). The N64 CPU is big-endian, so every
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* u32 in the ROM copy is BE-encoded; PC consumers read them natively (LE).
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*
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* Two kinds of CPU-interpreted u32 live in the segment:
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* - Gfx w1 words of IMAGESEG-marked G_SETTIMG commands (IMAGESEG(id) =
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* 0xABCD0000 | id, see bondconstants.h). texLoadFromDisplayList() scans
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* for the AB CD marker bytes and texLoad() reads the word back as
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* `*updateword & 0xffff` to get the image id.
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* - sImageTableEntry.index (first u32 of each 12-byte entry) in the 32
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* table arrays; read both as a raw word by texLoad() and as a struct
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* field by texSelect()/explosion.c.
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*
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* Everything else in the segment is byte-level (Gfx opcodes, single-byte
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* table fields, raw pixel blocks referenced via 0x02xxxxxx segmented
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* addresses) and needs no transform.
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*
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* After the fixup the marker bytes sit at offsets 6..7 of each Gfx (LE
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* encoding of 0xABCDxxxx), so texLoadFromDisplayList() checks them there
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* under PORT.
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*/
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void gimgFixupGlobalimagetable(u8 *base);
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/* Copy the IMAGESEG w1 words patched by texLoad() in the ROM copy back into
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* the compiled globalDL_0xNNN arrays (oddtextures.o), which explosion.c
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* executes via g_ExplosionDisplayLists[] on PC. The ROM copy and the
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* compiled arrays are byte-identical per D39, so command j of the ROM DL
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* maps to Gfx slot j of the compiled array (16-byte stride on PC). */
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void gimgSyncCompiledGlobalDLs(u8 *base);
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#endif
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