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295 lines
12 KiB
C++
295 lines
12 KiB
C++
// Copyright 2018 yuzu Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <cmath>
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#include <cstring>
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#include "common/alignment.h"
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#include "common/assert.h"
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#include "core/memory.h"
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#include "video_core/gpu.h"
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#include "video_core/textures/decoders.h"
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#include "video_core/textures/texture.h"
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namespace Tegra::Texture {
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/**
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* This table represents the internal swizzle of a gob,
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* in format 16 bytes x 2 sector packing.
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* Calculates the offset of an (x, y) position within a swizzled texture.
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* Taken from the Tegra X1 Technical Reference Manual. pages 1187-1188
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*/
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template <std::size_t N, std::size_t M, u32 Align>
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struct alignas(64) SwizzleTable {
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static_assert(M * Align == 64, "Swizzle Table does not align to GOB");
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constexpr SwizzleTable() {
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for (u32 y = 0; y < N; ++y) {
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for (u32 x = 0; x < M; ++x) {
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const u32 x2 = x * Align;
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values[y][x] = static_cast<u16>(((x2 % 64) / 32) * 256 + ((y % 8) / 2) * 64 +
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((x2 % 32) / 16) * 32 + (y % 2) * 16 + (x2 % 16));
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}
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}
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}
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const std::array<u16, M>& operator[](std::size_t index) const {
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return values[index];
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}
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std::array<std::array<u16, M>, N> values{};
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};
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constexpr auto legacy_swizzle_table = SwizzleTable<8, 64, 1>();
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constexpr auto fast_swizzle_table = SwizzleTable<8, 4, 16>();
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/**
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* This function manages ALL the GOBs(Group of Bytes) Inside a single block.
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* Instead of going gob by gob, we map the coordinates inside a block and manage from
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* those. Block_Width is assumed to be 1.
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*/
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void PreciseProcessBlock(u8* swizzled_data, u8* unswizzled_data, const bool unswizzle,
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const u32 x_start, const u32 y_start, const u32 z_start, const u32 x_end,
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const u32 y_end, const u32 z_end, const u32 tile_offset,
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const u32 xy_block_size, const u32 layer_z, const u32 stride_x,
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const u32 bytes_per_pixel, const u32 out_bytes_per_pixel) {
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std::array<u8*, 2> data_ptrs;
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u32 z_address = tile_offset;
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const u32 gob_size_x = 64;
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const u32 gob_size_y = 8;
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const u32 gob_size_z = 1;
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const u32 gob_size = gob_size_x * gob_size_y * gob_size_z;
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for (u32 z = z_start; z < z_end; z++) {
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u32 y_address = z_address;
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u32 pixel_base = layer_z * z + y_start * stride_x;
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for (u32 y = y_start; y < y_end; y++) {
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const auto& table = legacy_swizzle_table[y % gob_size_y];
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for (u32 x = x_start; x < x_end; x++) {
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const u32 swizzle_offset{y_address + table[x * bytes_per_pixel % gob_size_x]};
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const u32 pixel_index{x * out_bytes_per_pixel + pixel_base};
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data_ptrs[unswizzle] = swizzled_data + swizzle_offset;
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data_ptrs[!unswizzle] = unswizzled_data + pixel_index;
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std::memcpy(data_ptrs[0], data_ptrs[1], bytes_per_pixel);
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}
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pixel_base += stride_x;
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if ((y + 1) % gob_size_y == 0)
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y_address += gob_size;
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}
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z_address += xy_block_size;
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}
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}
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/**
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* This function manages ALL the GOBs(Group of Bytes) Inside a single block.
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* Instead of going gob by gob, we map the coordinates inside a block and manage from
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* those. Block_Width is assumed to be 1.
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*/
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void FastProcessBlock(u8* swizzled_data, u8* unswizzled_data, const bool unswizzle,
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const u32 x_start, const u32 y_start, const u32 z_start, const u32 x_end,
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const u32 y_end, const u32 z_end, const u32 tile_offset,
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const u32 xy_block_size, const u32 layer_z, const u32 stride_x,
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const u32 bytes_per_pixel, const u32 out_bytes_per_pixel) {
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std::array<u8*, 2> data_ptrs;
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u32 z_address = tile_offset;
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const u32 x_startb = x_start * bytes_per_pixel;
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const u32 x_endb = x_end * bytes_per_pixel;
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const u32 copy_size = 16;
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const u32 gob_size_x = 64;
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const u32 gob_size_y = 8;
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const u32 gob_size_z = 1;
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const u32 gob_size = gob_size_x * gob_size_y * gob_size_z;
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for (u32 z = z_start; z < z_end; z++) {
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u32 y_address = z_address;
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u32 pixel_base = layer_z * z + y_start * stride_x;
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for (u32 y = y_start; y < y_end; y++) {
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const auto& table = fast_swizzle_table[y % gob_size_y];
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for (u32 xb = x_startb; xb < x_endb; xb += copy_size) {
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const u32 swizzle_offset{y_address + table[(xb / copy_size) % 4]};
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const u32 out_x = xb * out_bytes_per_pixel / bytes_per_pixel;
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const u32 pixel_index{out_x + pixel_base};
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data_ptrs[unswizzle] = swizzled_data + swizzle_offset;
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data_ptrs[!unswizzle] = unswizzled_data + pixel_index;
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std::memcpy(data_ptrs[0], data_ptrs[1], copy_size);
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}
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pixel_base += stride_x;
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if ((y + 1) % gob_size_y == 0)
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y_address += gob_size;
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}
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z_address += xy_block_size;
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}
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}
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/**
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* This function unswizzles or swizzles a texture by mapping Linear to BlockLinear Textue.
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* The body of this function takes care of splitting the swizzled texture into blocks,
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* and managing the extents of it. Once all the parameters of a single block are obtained,
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* the function calls 'ProcessBlock' to process that particular Block.
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*
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* Documentation for the memory layout and decoding can be found at:
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* https://envytools.readthedocs.io/en/latest/hw/memory/g80-surface.html#blocklinear-surfaces
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*/
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template <bool fast>
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void SwizzledData(u8* swizzled_data, u8* unswizzled_data, const bool unswizzle, const u32 width,
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const u32 height, const u32 depth, const u32 bytes_per_pixel,
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const u32 out_bytes_per_pixel, const u32 block_height, const u32 block_depth) {
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auto div_ceil = [](const u32 x, const u32 y) { return ((x + y - 1) / y); };
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const u32 stride_x = width * out_bytes_per_pixel;
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const u32 layer_z = height * stride_x;
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const u32 gob_x_bytes = 64;
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const u32 gob_elements_x = gob_x_bytes / bytes_per_pixel;
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const u32 gob_elements_y = 8;
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const u32 gob_elements_z = 1;
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const u32 block_x_elements = gob_elements_x;
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const u32 block_y_elements = gob_elements_y * block_height;
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const u32 block_z_elements = gob_elements_z * block_depth;
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const u32 blocks_on_x = div_ceil(width, block_x_elements);
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const u32 blocks_on_y = div_ceil(height, block_y_elements);
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const u32 blocks_on_z = div_ceil(depth, block_z_elements);
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const u32 blocks = blocks_on_x * blocks_on_y * blocks_on_z;
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const u32 gob_size = gob_x_bytes * gob_elements_y * gob_elements_z;
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const u32 xy_block_size = gob_size * block_height;
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const u32 block_size = xy_block_size * block_depth;
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u32 tile_offset = 0;
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for (u32 zb = 0; zb < blocks_on_z; zb++) {
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const u32 z_start = zb * block_z_elements;
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const u32 z_end = std::min(depth, z_start + block_z_elements);
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for (u32 yb = 0; yb < blocks_on_y; yb++) {
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const u32 y_start = yb * block_y_elements;
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const u32 y_end = std::min(height, y_start + block_y_elements);
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for (u32 xb = 0; xb < blocks_on_x; xb++) {
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const u32 x_start = xb * block_x_elements;
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const u32 x_end = std::min(width, x_start + block_x_elements);
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if (fast) {
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FastProcessBlock(swizzled_data, unswizzled_data, unswizzle, x_start, y_start,
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z_start, x_end, y_end, z_end, tile_offset, xy_block_size,
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layer_z, stride_x, bytes_per_pixel, out_bytes_per_pixel);
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} else {
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PreciseProcessBlock(swizzled_data, unswizzled_data, unswizzle, x_start, y_start,
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z_start, x_end, y_end, z_end, tile_offset, xy_block_size,
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layer_z, stride_x, bytes_per_pixel, out_bytes_per_pixel);
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}
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tile_offset += block_size;
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}
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}
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}
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}
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void CopySwizzledData(u32 width, u32 height, u32 depth, u32 bytes_per_pixel,
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u32 out_bytes_per_pixel, u8* swizzled_data, u8* unswizzled_data,
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bool unswizzle, u32 block_height, u32 block_depth) {
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if (bytes_per_pixel % 3 != 0 && (width * bytes_per_pixel) % 16 == 0) {
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SwizzledData<true>(swizzled_data, unswizzled_data, unswizzle, width, height, depth,
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bytes_per_pixel, out_bytes_per_pixel, block_height, block_depth);
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} else {
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SwizzledData<false>(swizzled_data, unswizzled_data, unswizzle, width, height, depth,
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bytes_per_pixel, out_bytes_per_pixel, block_height, block_depth);
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}
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}
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u32 BytesPerPixel(TextureFormat format) {
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switch (format) {
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case TextureFormat::DXT1:
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case TextureFormat::DXN1:
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// In this case a 'pixel' actually refers to a 4x4 tile.
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return 8;
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case TextureFormat::DXT23:
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case TextureFormat::DXT45:
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case TextureFormat::DXN2:
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case TextureFormat::BC7U:
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case TextureFormat::BC6H_UF16:
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case TextureFormat::BC6H_SF16:
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// In this case a 'pixel' actually refers to a 4x4 tile.
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return 16;
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case TextureFormat::R32_G32_B32:
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return 12;
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case TextureFormat::ASTC_2D_4X4:
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case TextureFormat::ASTC_2D_5X4:
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case TextureFormat::ASTC_2D_8X8:
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case TextureFormat::ASTC_2D_8X5:
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case TextureFormat::A8R8G8B8:
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case TextureFormat::A2B10G10R10:
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case TextureFormat::BF10GF11RF11:
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case TextureFormat::R32:
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case TextureFormat::R16_G16:
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return 4;
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case TextureFormat::A1B5G5R5:
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case TextureFormat::B5G6R5:
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case TextureFormat::G8R8:
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case TextureFormat::R16:
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return 2;
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case TextureFormat::R8:
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return 1;
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case TextureFormat::R16_G16_B16_A16:
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return 8;
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case TextureFormat::R32_G32_B32_A32:
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return 16;
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case TextureFormat::R32_G32:
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return 8;
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default:
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UNIMPLEMENTED_MSG("Format not implemented");
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break;
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}
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}
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std::vector<u8> UnswizzleTexture(VAddr address, u32 tile_size, u32 bytes_per_pixel, u32 width,
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u32 height, u32 depth, u32 block_height, u32 block_depth) {
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std::vector<u8> unswizzled_data(width * height * depth * bytes_per_pixel);
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CopySwizzledData(width / tile_size, height / tile_size, depth, bytes_per_pixel, bytes_per_pixel,
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Memory::GetPointer(address), unswizzled_data.data(), true, block_height,
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block_depth);
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return unswizzled_data;
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}
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std::vector<u8> DecodeTexture(const std::vector<u8>& texture_data, TextureFormat format, u32 width,
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u32 height) {
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std::vector<u8> rgba_data;
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// TODO(Subv): Implement.
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switch (format) {
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case TextureFormat::DXT1:
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case TextureFormat::DXT23:
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case TextureFormat::DXT45:
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case TextureFormat::DXN1:
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case TextureFormat::DXN2:
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case TextureFormat::BC7U:
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case TextureFormat::BC6H_UF16:
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case TextureFormat::BC6H_SF16:
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case TextureFormat::ASTC_2D_4X4:
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case TextureFormat::ASTC_2D_8X8:
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case TextureFormat::A8R8G8B8:
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case TextureFormat::A2B10G10R10:
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case TextureFormat::A1B5G5R5:
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case TextureFormat::B5G6R5:
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case TextureFormat::R8:
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case TextureFormat::G8R8:
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case TextureFormat::BF10GF11RF11:
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case TextureFormat::R32_G32_B32_A32:
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case TextureFormat::R32_G32:
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case TextureFormat::R32:
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case TextureFormat::R16:
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case TextureFormat::R16_G16:
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case TextureFormat::R32_G32_B32:
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// TODO(Subv): For the time being just forward the same data without any decoding.
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rgba_data = texture_data;
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break;
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default:
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UNIMPLEMENTED_MSG("Format not implemented");
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break;
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}
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return rgba_data;
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}
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std::size_t CalculateSize(bool tiled, u32 bytes_per_pixel, u32 width, u32 height, u32 depth,
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u32 block_height, u32 block_depth) {
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if (tiled) {
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const u32 gobs_in_x = 64 / bytes_per_pixel;
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const u32 gobs_in_y = 8;
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const u32 gobs_in_z = 1;
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const u32 aligned_width = Common::AlignUp(width, gobs_in_x);
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const u32 aligned_height = Common::AlignUp(height, gobs_in_y * block_height);
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const u32 aligned_depth = Common::AlignUp(depth, gobs_in_z * block_depth);
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return aligned_width * aligned_height * aligned_depth * bytes_per_pixel;
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} else {
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return width * height * depth * bytes_per_pixel;
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}
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}
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} // namespace Tegra::Texture
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