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#include "ImgFXAnimFactory.h"
#include "Companion.h"
#include "spdlog/spdlog.h"
// ImgFX animation blob layout (produced by this factory):
//
// [0x00] u32 n64KeyframesOffset (original segment-relative, for vertex fixup)
// [0x04] u32 n64GfxOffset (original segment-relative, unused on port)
// [0x08] u16 vtxCount
// [0x0A] u16 gfxCount
// [0x0C] u16 keyframesCount
// [0x0E] u16 flags
// [0x10] Keyframe data (keyframesCount * vtxCount * 12 bytes, positions byte-swapped)
// [0x10 + keyframeDataSize] GFX data (gfxCount * 8 bytes, N64 Gfx commands word-swapped)
std::optional<std::shared_ptr<IParsedData>> PM64ImgFXAnimFactory::parse(std::vector<uint8_t>& buffer,
YAML::Node& node) {
auto segmentBase = GetSafeNode<uint32_t>(node, "offset");
auto headerOffset = GetSafeNode<uint32_t>(node, "header_offset");
uint32_t headerRomAddr = segmentBase + headerOffset;
if (headerRomAddr + 16 > buffer.size()) {
SPDLOG_ERROR("PM64:IMGFX_ANIM: Header at 0x{:X} exceeds buffer size 0x{:X}", headerRomAddr, buffer.size());
return std::nullopt;
}
// Read 16-byte N64 header (big-endian)
uint8_t* hdr = buffer.data() + headerRomAddr;
uint32_t n64KeyframesOffset = BSWAP32(*(uint32_t*)(hdr + 0x00));
uint32_t n64GfxOffset = BSWAP32(*(uint32_t*)(hdr + 0x04));
uint16_t vtxCount = BSWAP16(*(uint16_t*)(hdr + 0x08));
uint16_t gfxCount = BSWAP16(*(uint16_t*)(hdr + 0x0A));
uint16_t keyframesCount = BSWAP16(*(uint16_t*)(hdr + 0x0C));
uint16_t flags = BSWAP16(*(uint16_t*)(hdr + 0x0E));
uint32_t keyframeDataSize = keyframesCount * vtxCount * 12; // sizeof(ImgFXVtx) = 0x0C
uint32_t gfxDataSize = gfxCount * 8; // sizeof(N64 Gfx) = 8
uint32_t keyframesRomAddr = segmentBase + n64KeyframesOffset;
uint32_t gfxRomAddr = segmentBase + n64GfxOffset;
if (keyframesRomAddr + keyframeDataSize > buffer.size()) {
SPDLOG_ERROR("PM64:IMGFX_ANIM: Keyframe data at 0x{:X} (size 0x{:X}) exceeds buffer", keyframesRomAddr,
keyframeDataSize);
return std::nullopt;
}
if (gfxRomAddr + gfxDataSize > buffer.size()) {
SPDLOG_ERROR("PM64:IMGFX_ANIM: GFX data at 0x{:X} (size 0x{:X}) exceeds buffer", gfxRomAddr, gfxDataSize);
return std::nullopt;
}
// Build output blob: header (16) + keyframes + gfx
uint32_t blobSize = 16 + keyframeDataSize + gfxDataSize;
std::vector<uint8_t> blob(blobSize);
// Write header (already byte-swapped to native LE)
*(uint32_t*)(blob.data() + 0x00) = n64KeyframesOffset;
*(uint32_t*)(blob.data() + 0x04) = n64GfxOffset;
*(uint16_t*)(blob.data() + 0x08) = vtxCount;
*(uint16_t*)(blob.data() + 0x0A) = gfxCount;
*(uint16_t*)(blob.data() + 0x0C) = keyframesCount;
*(uint16_t*)(blob.data() + 0x0E) = flags;
// Copy and byte-swap keyframe data
// ImgFXVtx: s16 ob[3] (bytes 0-5, need swap), u8 tc[2] (bytes 6-7, no swap),
// s8 cn[3] (bytes 8-10, no swap), pad (byte 11, no swap)
uint8_t* kfSrc = buffer.data() + keyframesRomAddr;
uint8_t* kfDst = blob.data() + 16;
memcpy(kfDst, kfSrc, keyframeDataSize);
for (uint32_t i = 0; i + 12 <= keyframeDataSize; i += 12) {
uint16_t* v = reinterpret_cast<uint16_t*>(kfDst + i);
v[0] = BSWAP16(v[0]); // ob[0]
v[1] = BSWAP16(v[1]); // ob[1]
v[2] = BSWAP16(v[2]); // ob[2]
// bytes 6-11: u8/s8 fields, no swap needed
}
// Copy and byte-swap GFX data (N64 Gfx: two u32 words each)
uint8_t* gfxSrc = buffer.data() + gfxRomAddr;
uint8_t* gfxDst = blob.data() + 16 + keyframeDataSize;
memcpy(gfxDst, gfxSrc, gfxDataSize);
for (uint32_t i = 0; i + 8 <= gfxDataSize; i += 8) {
uint32_t* words = reinterpret_cast<uint32_t*>(gfxDst + i);
words[0] = BSWAP32(words[0]);
words[1] = BSWAP32(words[1]);
}
return std::make_shared<RawBuffer>(blob);
}
ExportResult PM64ImgFXAnimBinaryExporter::Export(std::ostream& write, std::shared_ptr<IParsedData> raw,
std::string& entryName, YAML::Node& node, std::string* replacement) {
auto writer = LUS::BinaryWriter();
auto data = std::static_pointer_cast<RawBuffer>(raw)->mBuffer;
WriteHeader(writer, Torch::ResourceType::Blob, 0);
writer.Write(static_cast<uint32_t>(data.size()));
writer.Write(reinterpret_cast<char*>(data.data()), data.size());
writer.Finish(write);
return std::nullopt;
}
ExportResult PM64ImgFXAnimHeaderExporter::Export(std::ostream& write, std::shared_ptr<IParsedData> raw,
std::string& entryName, YAML::Node& node, std::string* replacement) {
return std::nullopt;
}
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