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[GPU] TextureInfo::GetMipLocation - calculate packed mip offset

This commit is contained in:
Dr. Chat 2018-05-03 16:04:11 -05:00
parent 5e4b696782
commit 04748b4a0d
1 changed files with 20 additions and 4 deletions
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22
src/xenia/gpu/texture_info.cc
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@ -350,18 +350,34 @@ uint32_t TextureInfo::GetMipLocation(const TextureInfo& src, uint32_t mip,
: src.mip_address;
uint32_t address_offset = 0;
for (uint32_t i = 1; i < mip; i++) {
uint32_t logical_width = std::max((src.width + 1) >> mip, 1u);
uint32_t logical_height = std::max((src.height + 1) >> mip, 1u);
for (uint32_t i = 1; i < mip; i++) {
if (std::min(logical_width, logical_height) < 16) {
// We've reached the point where the mips are packed into a single tile.
// TODO(DrChat): Figure out how to calculate the packed tile offset.
continue;
break;
}
address_offset += std::max(src.input_length >> (i * 2), tile_size);
}
*offset_x = 0;
*offset_y = 0;
if (std::min(logical_width, logical_height) <= 16) {
// Find the block offset of the mip.
if (xe::log2_ceil(logical_width) > xe::log2_ceil(logical_height)) {
// Wider than tall. Laid out vertically.
*offset_y = logical_height & ~0x3;
*offset_x = (logical_height & 0x3) << 2;
} else {
// Taller than wide. Laid out horizontally.
*offset_x = logical_width & ~0x3;
*offset_y = (logical_width & 0x3) << 2;
}
}
*offset_x /= src.format_info()->block_width;
*offset_y /= src.format_info()->block_height;
return address_base + address_offset;
}