Improved Legacy Swizzler to be better documented and work better
This commit is contained in:
parent
bf2f2a715f
commit
68aaa83836
|
@ -14,17 +14,12 @@ namespace Tegra::Texture {
|
|||
|
||||
/**
|
||||
* 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) {
|
||||
static u32 GetSwizzleOffset(u32 x, u32 y, u32 bytes_per_pixel, u32 gob_address) {
|
||||
// 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 +
|
||||
u32 address = gob_address + ((x % 64) / 32) * 256 + ((y % 8) / 2) * 64 + ((x % 32) / 16) * 32 +
|
||||
(y % 2) * 16 + (x % 16);
|
||||
|
||||
return address;
|
||||
|
@ -32,21 +27,31 @@ static u32 GetSwizzleOffset(u32 x, u32 y, u32 image_width, u32 bytes_per_pixel,
|
|||
|
||||
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];
|
||||
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 =
|
||||
(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) {
|
||||
u32 swizzle_offset = GetSwizzleOffset(x, y, width, bytes_per_pixel, block_height);
|
||||
u32 pixel_index = (x + y * width) * out_bytes_per_pixel;
|
||||
const u32 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;
|
||||
|
||||
data_ptrs[unswizzle] = swizzled_data + swizzle_offset;
|
||||
data_ptrs[!unswizzle] = &unswizzled_data[pixel_index];
|
||||
data_ptrs[!unswizzle] = unswizzled_data + pixel_index;
|
||||
|
||||
std::memcpy(data_ptrs[0], data_ptrs[1], bytes_per_pixel);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
//This table represents the internal swizzle of a gob.
|
||||
// This table represents the internal swizzle of a gob.
|
||||
template <std::size_t N, std::size_t M>
|
||||
struct alignas(64) SwizzleTable {
|
||||
constexpr SwizzleTable() {
|
||||
|
@ -72,7 +77,7 @@ void FastSwizzleData(u32 width, u32 height, u32 bytes_per_pixel, u8* swizzled_da
|
|||
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 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) {
|
||||
|
@ -83,7 +88,8 @@ void FastSwizzleData(u32 width, u32 height, u32 bytes_per_pixel, u8* swizzled_da
|
|||
const auto& table = 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 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};
|
||||
data_ptrs[unswizzle] = swizzled_data + swizzle_offset;
|
||||
|
|
Reference in New Issue