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feat(component): implement CCharacterComponent::PasteTransparent8Bit

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This commit is contained in:
fallenoak 2025-10-31 00:22:37 -05:00
parent 3face44407
commit 2878b97ca6
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GPG Key ID: 7628F8E61AEA070D
1 changed files with 67 additions and 1 deletions
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68
src/component/CCharacterComponent.cpp
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@ -423,7 +423,73 @@ void CCharacterComponent::PasteTransparent4Bit(void* srcTexture, const BlpPalPix
}
void CCharacterComponent::PasteTransparent8Bit(void* srcTexture, const BlpPalPixel* srcPal, MipBits* dstMips, const C2iVector& dstPos, uint32_t dstWidth, const C2iVector& srcPos, const C2iVector& srcSize, TCTEXTUREINFO& srcInfo, int32_t srcMipLevel, int32_t dstMipLevelOfs) {
WHOA_UNIMPLEMENTED();
// Prepare first mip level
C2iVector curSrcSize = srcSize;
C2iVector curSrcPos = srcPos;
C2iVector curDstPos = dstPos;
uint32_t curSrcWidth = srcInfo.width >> srcMipLevel;
uint32_t curDstWidth = dstWidth;
uint32_t curSrcHeight = srcInfo.height >> srcMipLevel;
// Paste texture for each mip level
for (int32_t curMipLevel = srcMipLevel; curMipLevel < srcInfo.mipCount; curMipLevel++) {
auto srcMip = TextureCacheGetMip(srcTexture, curMipLevel);
auto srcRow = &srcMip[(curSrcPos.y * curSrcWidth) + curSrcPos.x];
auto srcAlphaRow = &srcMip[(curSrcWidth * curSrcHeight) + (curSrcPos.y * curSrcWidth) + curSrcPos.x];
auto dstMip = reinterpret_cast<uint8_t*>(dstMips[curMipLevel + dstMipLevelOfs].mip[0]);
auto dstRow = &dstMip[(curDstPos.y * curDstWidth) + (curDstPos.x * 4)];
// Calculate the end of the source region
auto srcEnd = srcRow + curSrcWidth * curSrcSize.y;
// Copy each row
while (srcRow < srcEnd) {
auto dst = reinterpret_cast<C4Pixel*>(dstRow);
for (uint32_t x = 0; x < curSrcSize.x; x++) {
// Get palette entry
auto& src = srcPal[srcRow[x]];
// Get alpha
uint8_t alpha = srcAlphaRow[x];
uint8_t invAlpha = 0xFF - alpha;
// Blend src color with dst
dst->b = (src.b * alpha + dst->b * invAlpha) / 0xFF;
dst->g = (src.g * alpha + dst->g * invAlpha) / 0xFF;
dst->r = (src.r * alpha + dst->r * invAlpha) / 0xFF;
dst->a = 0xFF;
dst++;
}
// Move to next row
srcRow += curSrcWidth;
srcAlphaRow += curSrcWidth;
dstRow += curDstWidth;
}
// Prepare next mip level
curSrcSize.x = std::max(1, curSrcSize.x / 2);
curSrcSize.y = std::max(1, curSrcSize.y / 2);
curSrcPos.x /= 2;
curSrcPos.y /= 2;
curDstPos.x /= 2;
curDstPos.y /= 2;
curDstWidth /= 2;
curSrcWidth /= 2;
curSrcHeight /= 2;
}
}
void CCharacterComponent::UpdateBaseTexture(EGxTexCommand cmd, uint32_t width, uint32_t height, uint32_t depth, uint32_t mipLevel, void* userArg, uint32_t& texelStrideInBytes, const void*& texels) {