76 lines
2.8 KiB
C++
76 lines
2.8 KiB
C++
#include "TexDecoder.h"
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#include "ImageReader.h"
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namespace PKG {
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// TEX 文件结构：
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// [magic1:NString(16)] "TEXV0005"
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// [magic2:NString(16)] "TEXI0001"
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// [format:int32] TexFormat
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// [flags:int32] TexType 标志位
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// [texW:int32][texH:int32] 纹理尺寸
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// [imgW:int32][imgH:int32] 图像尺寸
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// [unk:uint32]
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// <TexImageContainer> 图像数据（TEXB 块）
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Result<Tex> TexDecoder::Decode(StreamReader& reader) {
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Tex tex{};
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// 校验魔数
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auto magic1Res = reader.ReadNString(16);
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if (!magic1Res)
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return Fail<Tex>(magic1Res.error.code, magic1Res.error.message);
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tex.Magic1 = *magic1Res;
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if (tex.Magic1 != "TEXV0005")
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return Fail<Tex>(ErrorCode::BadMagic, "Invalid TEX magic1: " + tex.Magic1);
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auto magic2Res = reader.ReadNString(16);
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if (!magic2Res)
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return Fail<Tex>(magic2Res.error.code, magic2Res.error.message);
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tex.Magic2 = *magic2Res;
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if (tex.Magic2 != "TEXI0001")
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return Fail<Tex>(ErrorCode::BadMagic, "Invalid TEX magic2: " + tex.Magic2);
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// 读取头部字段
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auto formatRes = reader.ReadInt32();
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if (!formatRes) return Fail<Tex>(formatRes.error.code, formatRes.error.message);
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tex.Header.Format = static_cast<TexFormat>(*formatRes);
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auto flagsRes = reader.ReadInt32();
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if (!flagsRes) return Fail<Tex>(flagsRes.error.code, flagsRes.error.message);
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tex.Header.Flags = static_cast<TexType>(*flagsRes);
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auto texWidthRes = reader.ReadInt32();
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if (!texWidthRes) return Fail<Tex>(texWidthRes.error.code, texWidthRes.error.message);
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tex.Header.TextureWidth = *texWidthRes;
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auto texHeightRes = reader.ReadInt32();
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if (!texHeightRes) return Fail<Tex>(texHeightRes.error.code, texHeightRes.error.message);
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tex.Header.TextureHeight = *texHeightRes;
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auto imgWidthRes = reader.ReadInt32();
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if (!imgWidthRes) return Fail<Tex>(imgWidthRes.error.code, imgWidthRes.error.message);
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tex.Header.ImageWidth = *imgWidthRes;
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auto imgHeightRes = reader.ReadInt32();
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if (!imgHeightRes) return Fail<Tex>(imgHeightRes.error.code, imgHeightRes.error.message);
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tex.Header.ImageHeight = *imgHeightRes;
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auto unkRes = reader.ReadUInt32();
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if (!unkRes) return Fail<Tex>(unkRes.error.code, unkRes.error.message);
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tex.Header.UnkInt0 = *unkRes;
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// 解析标志位
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tex.IsGif = (static_cast<int>(tex.Header.Flags) & static_cast<int>(TexType::IsGif)) != 0;
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tex.IsVideoTexture = (static_cast<int>(tex.Header.Flags) & static_cast<int>(TexType::IsVideoTexture)) != 0;
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// 读取图像容器
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auto containerRes = ImageReader::ReadContainer(reader, tex.Header.Format);
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if (!containerRes)
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return Fail<Tex>(containerRes.error.code, containerRes.error.message);
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tex.ImageContainer = *containerRes;
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return Ok(std::move(tex));
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}
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} // namespace PKG
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