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Standarized Legacy Swizzle to look alike FastSwizzle and use a Swizzling Table instead

nce_cpp
FernandoS27 7 years ago
parent
55543db875
commit
dc98e08d51
1 changed files with 38 additions and 42 deletions
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  1. 80
      src/video_core/textures/decoders.cpp

80
src/video_core/textures/decoders.cpp
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@ -13,35 +13,51 @@
namespace Tegra::Texture {
/**
* This table represents the internal swizzle of a gob,
* in format 16 bytes x 2 sector packing.
* Calculates the offset of an (x, y) position within a swizzled texture.
* Taken from the Tegra X1 Technical Reference Manual. pages 1187-1188
*/
static u32 GetSwizzleOffset(u32 x, u32 y, u32 bytes_per_pixel, u32 gob_address) {
// Round up to the next gob
x *= bytes_per_pixel;
u32 address = gob_address + ((x % 64) / 32) * 256 + ((y % 8) / 2) * 64 + ((x % 32) / 16) * 32 +
(y % 2) * 16 + (x % 16);
template <std::size_t N, std::size_t M, u32 Align>
struct alignas(64) SwizzleTable {
static_assert(M * Align == 64, "Swizzle Table does not align to GOB");
constexpr SwizzleTable() {
for (u32 y = 0; y < N; ++y) {
for (u32 x = 0; x < M; ++x) {
const u32 x2 = x * Align;
values[y][x] = static_cast<u16>(((x2 % 64) / 32) * 256 + ((y % 8) / 2) * 64 +
((x2 % 32) / 16) * 32 + (y % 2) * 16 + (x2 % 16));
}
}
}
const std::array<u16, M>& operator[](std::size_t index) const {
return values[index];
}
std::array<std::array<u16, M>, N> values{};
};
return address;
}
constexpr auto legacy_swizzle_table = SwizzleTable<8, 64, 1>();
constexpr auto fast_swizzle_table = SwizzleTable<8, 4, 16>();
void CopySwizzledData(u32 width, u32 height, u32 bytes_per_pixel, u32 out_bytes_per_pixel,
u8* swizzled_data, u8* unswizzled_data, bool unswizzle, u32 block_height) {
std::array<u8*, 2> data_ptrs;
const u32 stride = width * bytes_per_pixel;
const u32 gobs_in_x = 64;
const u32 gobs_in_y = 8;
const u32 gobs_size = gobs_in_x * gobs_in_y;
const u32 image_width_in_gobs{(stride + gobs_in_x - 1) / gobs_in_x};
for (unsigned y = 0; y < height; ++y) {
const u32 gob_y_address =
const std::size_t stride = width * bytes_per_pixel;
const std::size_t gobs_in_x = 64;
const std::size_t gobs_in_y = 8;
const std::size_t gobs_size = gobs_in_x * gobs_in_y;
const std::size_t image_width_in_gobs{(stride + gobs_in_x - 1) / gobs_in_x};
for (std::size_t y = 0; y < height; ++y) {
const std::size_t gob_y_address =
(y / (gobs_in_y * block_height)) * gobs_size * block_height * image_width_in_gobs +
(y % (gobs_in_y * block_height) / gobs_in_y) * gobs_size;
for (unsigned x = 0; x < width; ++x) {
const u32 gob_address =
const auto& table = legacy_swizzle_table[y % gobs_in_y];
for (std::size_t x = 0; x < width; ++x) {
const std::size_t gob_address =
gob_y_address + (x * bytes_per_pixel / gobs_in_x) * gobs_size * block_height;
const u32 swizzle_offset = GetSwizzleOffset(x, y, bytes_per_pixel, gob_address);
const u32 pixel_index = (x + y * width) * out_bytes_per_pixel;
const std::size_t x2 = x * bytes_per_pixel;
const std::size_t swizzle_offset = gob_address + table[x2 % gobs_in_x];
const std::size_t pixel_index = (x + y * width) * out_bytes_per_pixel;
data_ptrs[unswizzle] = swizzled_data + swizzle_offset;
data_ptrs[!unswizzle] = unswizzled_data + pixel_index;
@ -51,28 +67,8 @@ void CopySwizzledData(u32 width, u32 height, u32 bytes_per_pixel, u32 out_bytes_
}
}
// This table represents the internal swizzle of a gob.
template <std::size_t N, std::size_t M>
struct alignas(64) SwizzleTable {
constexpr SwizzleTable() {
for (u32 y = 0; y < N; ++y) {
for (u32 x = 0; x < M; ++x) {
const u32 x2 = x * 16;
values[y][x] = static_cast<u16>(((x2 % 64) / 32) * 256 + ((y % 8) / 2) * 64 +
((x2 % 32) / 16) * 32 + (y % 2) * 16);
}
}
}
const std::array<u16, M>& operator[](std::size_t index) const {
return values[index];
}
std::array<std::array<u16, M>, N> values{};
};
constexpr auto swizzle_table = SwizzleTable<8, 4>();
void FastSwizzleData(u32 width, u32 height, u32 bytes_per_pixel, u32 out_bytes_per_pixel, u8* swizzled_data,
u8* unswizzled_data, bool unswizzle, u32 block_height) {
void FastSwizzleData(u32 width, u32 height, u32 bytes_per_pixel, u32 out_bytes_per_pixel,
u8* swizzled_data, u8* unswizzled_data, bool unswizzle, u32 block_height) {
std::array<u8*, 2> data_ptrs;
const std::size_t stride{width * bytes_per_pixel};
const std::size_t gobs_in_x = 64;
@ -85,13 +81,13 @@ void FastSwizzleData(u32 width, u32 height, u32 bytes_per_pixel, u32 out_bytes_p
(y / (gobs_in_y * block_height)) * gobs_size * block_height * image_width_in_gobs +
(y % (gobs_in_y * block_height) / gobs_in_y) * gobs_size;
const std::size_t pixel_base{y * width * out_bytes_per_pixel};
const auto& table = swizzle_table[y % gobs_in_y];
const auto& table = fast_swizzle_table[y % gobs_in_y];
for (std::size_t xb = 0; xb < stride; xb += copy_size) {
const std::size_t truncated_copy = std::min(copy_size, stride - xb);
const std::size_t gob_address{initial_gob +
(xb / gobs_in_x) * gobs_size * block_height};
const std::size_t swizzle_offset{gob_address + table[(xb / 16) % 4]};
const std::size_t out_x = xb*out_bytes_per_pixel / bytes_per_pixel;
const std::size_t out_x = xb * out_bytes_per_pixel / bytes_per_pixel;
const std::size_t pixel_index{out_x + pixel_base};
data_ptrs[unswizzle] = swizzled_data + swizzle_offset;
data_ptrs[!unswizzle] = unswizzled_data + pixel_index;

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