200 lines
7.5 KiB
C++
200 lines
7.5 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/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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* 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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static u32 GetSwizzleOffset(u32 x, u32 y, u32 bytes_per_pixel, u32 gob_address) {
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// Round up to the next gob
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x *= bytes_per_pixel;
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u32 address = gob_address + ((x % 64) / 32) * 256 + ((y % 8) / 2) * 64 + ((x % 32) / 16) * 32 +
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(y % 2) * 16 + (x % 16);
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return address;
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}
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void CopySwizzledData(u32 width, u32 height, u32 bytes_per_pixel, u32 out_bytes_per_pixel,
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u8* swizzled_data, u8* unswizzled_data, bool unswizzle, u32 block_height) {
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std::array<u8*, 2> data_ptrs;
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const u32 stride = width * bytes_per_pixel;
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const u32 gobs_in_x = 64;
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const u32 gobs_in_y = 8;
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const u32 gobs_size = gobs_in_x * gobs_in_y;
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const u32 image_width_in_gobs{(stride + gobs_in_x - 1) / gobs_in_x};
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for (unsigned y = 0; y < height; ++y) {
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const u32 gob_y_address =
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(y / (gobs_in_y * block_height)) * gobs_size * block_height * image_width_in_gobs +
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(y % (gobs_in_y * block_height) / gobs_in_y) * gobs_size;
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for (unsigned x = 0; x < width; ++x) {
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const u32 gob_address =
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gob_y_address + (x * bytes_per_pixel / gobs_in_x) * gobs_size * block_height;
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const u32 swizzle_offset = GetSwizzleOffset(x, y, bytes_per_pixel, gob_address);
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const u32 pixel_index = (x + y * width) * out_bytes_per_pixel;
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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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}
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}
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// This table represents the internal swizzle of a gob.
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template <std::size_t N, std::size_t M>
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struct alignas(64) SwizzleTable {
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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 * 16;
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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);
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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 swizzle_table = SwizzleTable<8, 4>();
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void FastSwizzleData(u32 width, u32 height, u32 bytes_per_pixel, u32 out_bytes_per_pixel, u8* swizzled_data,
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u8* unswizzled_data, bool unswizzle, u32 block_height) {
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std::array<u8*, 2> data_ptrs;
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const std::size_t stride{width * bytes_per_pixel};
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const std::size_t gobs_in_x = 64;
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const std::size_t gobs_in_y = 8;
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const std::size_t gobs_size = gobs_in_x * gobs_in_y;
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const std::size_t image_width_in_gobs{(stride + gobs_in_x - 1) / gobs_in_x};
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const std::size_t copy_size{16};
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for (std::size_t y = 0; y < height; ++y) {
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const std::size_t initial_gob =
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(y / (gobs_in_y * block_height)) * gobs_size * block_height * image_width_in_gobs +
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(y % (gobs_in_y * block_height) / gobs_in_y) * gobs_size;
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const std::size_t pixel_base{y * width * out_bytes_per_pixel};
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const auto& table = swizzle_table[y % gobs_in_y];
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for (std::size_t xb = 0; xb < stride; xb += copy_size) {
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const std::size_t truncated_copy = std::min(copy_size, stride - xb);
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const std::size_t gob_address{initial_gob +
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(xb / gobs_in_x) * gobs_size * block_height};
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const std::size_t swizzle_offset{gob_address + table[(xb / 16) % 4]};
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const std::size_t out_x = xb*out_bytes_per_pixel / bytes_per_pixel;
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const std::size_t 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], truncated_copy);
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}
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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_8X8:
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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 block_height) {
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std::vector<u8> unswizzled_data(width * height * bytes_per_pixel);
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if (bytes_per_pixel % 3 != 0) {
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FastSwizzleData(width / tile_size, height / tile_size, bytes_per_pixel, bytes_per_pixel,
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Memory::GetPointer(address), unswizzled_data.data(), true, block_height);
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} else {
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CopySwizzledData(width / tile_size, height / tile_size, bytes_per_pixel, bytes_per_pixel,
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Memory::GetPointer(address), unswizzled_data.data(), true, block_height);
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}
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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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} // namespace Tegra::Texture
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