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Merge pull request #1377 from FernandoS27/faster-swizzle 

Improved Fast Swizzle and Legacy Swizzle
nce_cpp
bunnei 7 years ago
committed by GitHub
parent
d2ef536216 9acd217fed
commit
234f8bc834
1 changed files with 66 additions and 51 deletions
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  1. 113
      src/video_core/textures/decoders.cpp

113
src/video_core/textures/decoders.cpp
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@ -13,47 +13,20 @@
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 TRM.
* Taken from the Tegra X1 Technical Reference Manual. pages 1187-1188
*/
static u32 GetSwizzleOffset(u32 x, u32 y, u32 image_width, u32 bytes_per_pixel, u32 block_height) {
// Round up to the next gob
const u32 image_width_in_gobs{(image_width * bytes_per_pixel + 63) / 64};
u32 GOB_address = 0 + (y / (8 * block_height)) * 512 * block_height * image_width_in_gobs +
(x * bytes_per_pixel / 64) * 512 * block_height +
(y % (8 * block_height) / 8) * 512;
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);
return address;
}
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) {
u8* data_ptrs[2];
for (unsigned y = 0; y < height; ++y) {
for (unsigned x = 0; x < width; ++x) {
u32 swizzle_offset = GetSwizzleOffset(x, y, width, bytes_per_pixel, block_height);
u32 pixel_index = (x + y * width) * out_bytes_per_pixel;
data_ptrs[unswizzle] = swizzled_data + swizzle_offset;
data_ptrs[!unswizzle] = &unswizzled_data[pixel_index];
std::memcpy(data_ptrs[0], data_ptrs[1], bytes_per_pixel);
}
}
}
template <std::size_t N, std::size_t M>
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 * 16;
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 % 32) / 16) * 32 + (y % 2) * 16 + (x2 % 16));
}
}
}
@ -63,24 +36,60 @@ struct alignas(64) SwizzleTable {
std::array<std::array<u16, M>, N> values{};
};
constexpr auto swizzle_table = SwizzleTable<8, 4>();
constexpr auto legacy_swizzle_table = SwizzleTable<8, 64, 1>();
constexpr auto fast_swizzle_table = SwizzleTable<8, 4, 16>();
static void LegacySwizzleData(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;
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;
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 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;
void FastSwizzleData(u32 width, u32 height, u32 bytes_per_pixel, u8* swizzled_data,
u8* unswizzled_data, bool unswizzle, u32 block_height) {
std::memcpy(data_ptrs[0], data_ptrs[1], bytes_per_pixel);
}
}
}
static 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 image_width_in_gobs{(stride + 63) / 64};
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};
const std::size_t copy_size{16};
for (std::size_t y = 0; y < height; ++y) {
const std::size_t initial_gob =
(y / (8 * block_height)) * 512 * block_height * image_width_in_gobs +
(y % (8 * block_height) / 8) * 512;
const std::size_t pixel_base{y * width * bytes_per_pixel};
const auto& table = swizzle_table[y % 8];
(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 = fast_swizzle_table[y % gobs_in_y];
for (std::size_t xb = 0; xb < stride; xb += copy_size) {
const std::size_t gob_address{initial_gob + (xb / 64) * 512 * block_height};
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 pixel_index{xb + pixel_base};
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;
std::memcpy(data_ptrs[0], data_ptrs[1], copy_size);
@ -88,6 +97,17 @@ void FastSwizzleData(u32 width, u32 height, u32 bytes_per_pixel, u8* swizzled_da
}
}
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) {
if (bytes_per_pixel % 3 != 0 && (width * bytes_per_pixel) % 16 == 0) {
FastSwizzleData(width, height, bytes_per_pixel, out_bytes_per_pixel, swizzled_data,
unswizzled_data, unswizzle, block_height);
} else {
LegacySwizzleData(width, height, bytes_per_pixel, out_bytes_per_pixel, swizzled_data,
unswizzled_data, unswizzle, block_height);
}
}
u32 BytesPerPixel(TextureFormat format) {
switch (format) {
case TextureFormat::DXT1:
@ -134,13 +154,8 @@ u32 BytesPerPixel(TextureFormat format) {
std::vector<u8> UnswizzleTexture(VAddr address, u32 tile_size, u32 bytes_per_pixel, u32 width,
u32 height, u32 block_height) {
std::vector<u8> unswizzled_data(width * height * bytes_per_pixel);
if (bytes_per_pixel % 3 != 0 && (width * bytes_per_pixel) % 16 == 0) {
FastSwizzleData(width / tile_size, height / tile_size, bytes_per_pixel,
Memory::GetPointer(address), unswizzled_data.data(), true, block_height);
} else {
CopySwizzledData(width / tile_size, height / tile_size, bytes_per_pixel, bytes_per_pixel,
Memory::GetPointer(address), unswizzled_data.data(), true, block_height);
}
return unswizzled_data;
}

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