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Clarify texture swizzling inner-loop iteration count

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The iterations of the inner loop for sector deswizzling was miscalculated as `SectorWidth * SectorHeight` while the result was correct at `32`, it should be determined by the amount of sector lines within a GOB i.e.: `(GobWidth / SectorWidth) * GobHeight`.
This commit is contained in:
PixelyIon 2022-05-27 22:08:27 +05:30
parent 7d4e0a7844
commit fe615b1e03
1 changed files with 7 additions and 6 deletions
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13
app/src/main/cpp/skyline/gpu/texture/layout.cpp
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@ -5,10 +5,11 @@
namespace skyline::gpu::texture {
// Reference on Block-linear tiling: https://gist.github.com/PixelyIon/d9c35050af0ef5690566ca9f0965bc32
constexpr u8 SectorWidth{16}; // The width of a sector in bytes
constexpr u8 SectorHeight{2}; // The height of a sector in lines
constexpr u8 GobWidth{64}; // The width of a GOB in bytes
constexpr u8 GobHeight{8}; // The height of a GOB in lines
constexpr size_t SectorWidth{16}; //!< The width of a sector in bytes
constexpr size_t SectorHeight{2}; //!< The height of a sector in lines
constexpr size_t GobWidth{64}; //!< The width of a GOB in bytes
constexpr size_t GobHeight{8}; //!< The height of a GOB in lines
constexpr size_t SectorLinesInGob{(GobWidth / SectorWidth) * GobHeight}; //!< The number of lines of sectors inside a GOB
size_t GetBlockLinearLayerSize(Dimensions dimensions, size_t formatBlockWidth, size_t formatBlockHeight, size_t formatBpb, size_t gobBlockHeight, size_t gobBlockDepth) {
size_t robLineWidth{util::DivideCeil<size_t>(dimensions.width, formatBlockWidth)}; //!< The width of the ROB in terms of format blocks
@ -118,8 +119,8 @@ namespace skyline::gpu::texture {
for (size_t gobZ{}; gobZ < blockDepth; gobZ++) { // Every Block contains `blockDepth` Z-axis GOBs (Slices)
u8 *linearGob{linearBlock};
for (size_t gobY{}; gobY < blockHeight; gobY++) { // Every Block contains `blockHeight` Y-axis GOBs
#pragma clang loop unroll_count(32)
for (size_t index{}; index < SectorWidth * SectorHeight; index++) { // Every Y-axis GOB contains `sectorWidth * sectorHeight` sectors
#pragma clang loop unroll_count(SectorLinesInGob)
for (size_t index{}; index < SectorLinesInGob; index++) {
size_t xT{((index << 3) & 0b10000) | ((index << 1) & 0b100000)}; // Morton-Swizzle on the X-axis
size_t yT{((index >> 1) & 0b110) | (index & 0b1)}; // Morton-Swizzle on the Y-axis