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[GPU] Use log2 when calculating mip offset

This commit is contained in:
Dr. Chat 2018-05-05 10:45:39 -05:00
parent 289a24820f
commit 30f8fe7bb0
1 changed files with 20 additions and 29 deletions
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49
src/xenia/gpu/texture_info.cc
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@ -439,30 +439,17 @@ uint32_t TextureInfo::GetMipLocation(const TextureInfo& src, uint32_t mip,
}
// Now, check if the mip is packed at an offset.
uint32_t logical_width = std::max(xe::next_pow2(src.width + 1) >> mip, 1u);
uint32_t logical_height = std::max(xe::next_pow2(src.height + 1) >> mip, 1u);
*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 ? logical_width << 1 : 0;
} else {
// Taller than wide. Laid out horizontally.
*offset_x = logical_width & ~0x3;
*offset_y = logical_width & 0x3 ? logical_height << 1 : 0;
}
}
*offset_x /= src.format_info()->block_width;
*offset_y /= src.format_info()->block_height;
GetPackedTileOffset(xe::next_pow2(src.width + 1) >> mip,
xe::next_pow2(src.height + 1) >> mip, src.format_info(),
offset_x, offset_y);
return address_base + address_offset;
}
uint32_t TextureInfo::GetMipSize(const TextureInfo& src, uint32_t mip) {
if (mip == 0) {
return src.input_length;
}
uint32_t bytes_per_block = src.format_info()->block_width *
src.format_info()->block_height *
src.format_info()->bits_per_pixel / 8;
@ -537,21 +524,24 @@ bool TextureInfo::GetPackedTileOffset(uint32_t width, uint32_t height,
// The minimum dimension is what matters most: if either width or height
// is <= 16 this mode kicks in.
if (std::min(width, height) > 16) {
uint32_t log2_width = xe::log2_ceil(width);
uint32_t log2_height = xe::log2_ceil(height);
if (std::min(log2_width, log2_height) > 4) {
// Too big, not packed.
*out_offset_x = 0;
*out_offset_y = 0;
return false;
}
if (xe::log2_ceil(width) > xe::log2_ceil(height)) {
// Find the block offset of the mip.
if (log2_width > log2_height) {
// Wider than tall. Laid out vertically.
*out_offset_x = 0;
*out_offset_y = 16;
*out_offset_y = log2_height > 0x1 ? 1 << log2_height : 0;
*out_offset_x = log2_height <= 0x1 ? 1 << (log2_width + 2) : 0;
} else {
// Taller than wide. Laid out horizontally.
*out_offset_x = 16;
*out_offset_y = 0;
*out_offset_x = log2_width > 0x1 ? 1 << log2_width : 0;
*out_offset_y = log2_width <= 0x1 ? 1 << (log2_height + 2) : 0;
}
*out_offset_x /= format_info->block_width;
@ -562,9 +552,10 @@ bool TextureInfo::GetPackedTileOffset(uint32_t width, uint32_t height,
bool TextureInfo::GetPackedTileOffset(const TextureInfo& texture_info,
uint32_t* out_offset_x,
uint32_t* out_offset_y) {
return GetPackedTileOffset(
texture_info.size_2d.logical_width, texture_info.size_2d.logical_height,
texture_info.format_info(), out_offset_x, out_offset_y);
return GetPackedTileOffset(xe::next_pow2(texture_info.size_2d.logical_width),
xe::next_pow2(texture_info.size_2d.logical_height),
texture_info.format_info(), out_offset_x,
out_offset_y);
}
// https://github.com/BinomialLLC/crunch/blob/ea9b8d8c00c8329791256adafa8cf11e4e7942a2/inc/crn_decomp.h#L4108