diff options
Diffstat (limited to 'src/video_core/engines/sw_blitter/blitter.cpp')
| -rw-r--r-- | src/video_core/engines/sw_blitter/blitter.cpp | 238 |
1 files changed, 238 insertions, 0 deletions
diff --git a/src/video_core/engines/sw_blitter/blitter.cpp b/src/video_core/engines/sw_blitter/blitter.cpp new file mode 100644 index 000000000..2f1ea4626 --- /dev/null +++ b/src/video_core/engines/sw_blitter/blitter.cpp @@ -0,0 +1,238 @@ +// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project +// SPDX-License-Identifier: GPL-3.0-or-later + +#include <algorithm> +#include <cmath> +#include <vector> + +#include "video_core/engines/sw_blitter/blitter.h" +#include "video_core/engines/sw_blitter/converter.h" +#include "video_core/memory_manager.h" +#include "video_core/surface.h" +#include "video_core/textures/decoders.h" + +namespace Tegra { +class MemoryManager; +} + +using VideoCore::Surface::BytesPerBlock; +using VideoCore::Surface::PixelFormatFromRenderTargetFormat; + +namespace Tegra::Engines::Blitter { + +using namespace Texture; + +namespace { + +constexpr size_t ir_components = 4; + +void NearestNeighbor(std::span<const u8> input, std::span<u8> output, u32 src_width, u32 src_height, + u32 dst_width, u32 dst_height, size_t bpp) { + const size_t dx_du = std::llround((static_cast<f64>(src_width) / dst_width) * (1ULL << 32)); + const size_t dy_dv = std::llround((static_cast<f64>(src_height) / dst_height) * (1ULL << 32)); + size_t src_y = 0; + for (u32 y = 0; y < dst_height; y++) { + size_t src_x = 0; + for (u32 x = 0; x < dst_width; x++) { + const size_t read_from = ((src_y * src_width + src_x) >> 32) * bpp; + const size_t write_to = (y * dst_width + x) * bpp; + + std::memcpy(&output[write_to], &input[read_from], bpp); + src_x += dx_du; + } + src_y += dy_dv; + } +} + +void NearestNeighborFast(std::span<const f32> input, std::span<f32> output, u32 src_width, + u32 src_height, u32 dst_width, u32 dst_height) { + const size_t dx_du = std::llround((static_cast<f64>(src_width) / dst_width) * (1ULL << 32)); + const size_t dy_dv = std::llround((static_cast<f64>(src_height) / dst_height) * (1ULL << 32)); + size_t src_y = 0; + for (u32 y = 0; y < dst_height; y++) { + size_t src_x = 0; + for (u32 x = 0; x < dst_width; x++) { + const size_t read_from = ((src_y * src_width + src_x) >> 32) * ir_components; + const size_t write_to = (y * dst_width + x) * ir_components; + + std::memcpy(&output[write_to], &input[read_from], sizeof(f32) * ir_components); + src_x += dx_du; + } + src_y += dy_dv; + } +} + +void Bilinear(std::span<const f32> input, std::span<f32> output, size_t src_width, + size_t src_height, size_t dst_width, size_t dst_height) { + const auto bilinear_sample = [](std::span<const f32> x0_y0, std::span<const f32> x1_y0, + std::span<const f32> x0_y1, std::span<const f32> x1_y1, + f32 weight_x, f32 weight_y) { + std::array<f32, ir_components> result{}; + for (size_t i = 0; i < ir_components; i++) { + const f32 a = std::lerp(x0_y0[i], x1_y0[i], weight_x); + const f32 b = std::lerp(x0_y1[i], x1_y1[i], weight_x); + result[i] = std::lerp(a, b, weight_y); + } + return result; + }; + const f32 dx_du = + dst_width > 1 ? static_cast<f32>(src_width - 1) / static_cast<f32>(dst_width - 1) : 0.f; + const f32 dy_dv = + dst_height > 1 ? static_cast<f32>(src_height - 1) / static_cast<f32>(dst_height - 1) : 0.f; + for (u32 y = 0; y < dst_height; y++) { + for (u32 x = 0; x < dst_width; x++) { + const f32 x_low = std::floor(static_cast<f32>(x) * dx_du); + const f32 y_low = std::floor(static_cast<f32>(y) * dy_dv); + const f32 x_high = std::ceil(static_cast<f32>(x) * dx_du); + const f32 y_high = std::ceil(static_cast<f32>(y) * dy_dv); + const f32 weight_x = (static_cast<f32>(x) * dx_du) - x_low; + const f32 weight_y = (static_cast<f32>(y) * dy_dv) - y_low; + + const auto read_src = [&](f32 in_x, f32 in_y) { + const size_t read_from = + ((static_cast<size_t>(in_x) * src_width + static_cast<size_t>(in_y)) >> 32) * + ir_components; + return std::span<const f32>(&input[read_from], ir_components); + }; + + auto x0_y0 = read_src(x_low, y_low); + auto x1_y0 = read_src(x_high, y_low); + auto x0_y1 = read_src(x_low, y_high); + auto x1_y1 = read_src(x_high, y_high); + + const auto result = bilinear_sample(x0_y0, x1_y0, x0_y1, x1_y1, weight_x, weight_y); + + const size_t write_to = (y * dst_width + x) * ir_components; + + std::memcpy(&output[write_to], &result, sizeof(f32) * ir_components); + } + } +} + +} // namespace + +struct SoftwareBlitEngine::BlitEngineImpl { + std::vector<u8> tmp_buffer; + std::vector<u8> src_buffer; + std::vector<u8> dst_buffer; + std::vector<f32> intermediate_src; + std::vector<f32> intermediate_dst; + ConverterFactory converter_factory; +}; + +SoftwareBlitEngine::SoftwareBlitEngine(MemoryManager& memory_manager_) + : memory_manager{memory_manager_} { + impl = std::make_unique<BlitEngineImpl>(); +} + +SoftwareBlitEngine::~SoftwareBlitEngine() = default; + +bool SoftwareBlitEngine::Blit(Fermi2D::Surface& src, Fermi2D::Surface& dst, + Fermi2D::Config& config) { + const auto get_surface_size = [](Fermi2D::Surface& surface, u32 bytes_per_pixel) { + if (surface.linear == Fermi2D::MemoryLayout::BlockLinear) { + return CalculateSize(true, bytes_per_pixel, surface.width, surface.height, + surface.depth, surface.block_height, surface.block_depth); + } + return static_cast<size_t>(surface.pitch * surface.height); + }; + const auto process_pitch_linear = [](bool unpack, std::span<const u8> input, + std::span<u8> output, u32 extent_x, u32 extent_y, + u32 pitch, u32 x0, u32 y0, size_t bpp) { + const size_t base_offset = x0 * bpp; + const size_t copy_size = extent_x * bpp; + for (u32 y = y0; y < extent_y; y++) { + const size_t first_offset = y * pitch + base_offset; + const size_t second_offset = y * extent_x * bpp; + u8* write_to = unpack ? &output[first_offset] : &output[second_offset]; + const u8* read_from = unpack ? &input[second_offset] : &input[first_offset]; + std::memcpy(write_to, read_from, copy_size); + } + }; + + const u32 src_extent_x = config.src_x1 - config.src_x0; + const u32 src_extent_y = config.src_y1 - config.src_y0; + + const u32 dst_extent_x = config.dst_x1 - config.dst_x0; + const u32 dst_extent_y = config.dst_y1 - config.dst_y0; + const auto src_bytes_per_pixel = BytesPerBlock(PixelFormatFromRenderTargetFormat(src.format)); + const auto dst_bytes_per_pixel = BytesPerBlock(PixelFormatFromRenderTargetFormat(dst.format)); + const size_t src_size = get_surface_size(src, src_bytes_per_pixel); + impl->tmp_buffer.resize(src_size); + memory_manager.ReadBlock(src.Address(), impl->tmp_buffer.data(), src_size); + + const size_t src_copy_size = src_extent_x * src_extent_y * src_bytes_per_pixel; + + const size_t dst_copy_size = dst_extent_x * dst_extent_y * dst_bytes_per_pixel; + + impl->src_buffer.resize(src_copy_size); + + const bool no_passthrough = + src.format != dst.format || src_extent_x != dst_extent_x || src_extent_y != dst_extent_y; + + const auto convertion_phase_same_format = [&]() { + NearestNeighbor(impl->src_buffer, impl->dst_buffer, src_extent_x, src_extent_y, + dst_extent_x, dst_extent_y, dst_bytes_per_pixel); + }; + + const auto convertion_phase_ir = [&]() { + auto* input_converter = impl->converter_factory.GetFormatConverter(src.format); + impl->intermediate_src.resize((src_copy_size / src_bytes_per_pixel) * ir_components); + impl->intermediate_dst.resize((dst_copy_size / dst_bytes_per_pixel) * ir_components); + input_converter->ConvertTo(impl->src_buffer, impl->intermediate_src); + + if (config.filter != Fermi2D::Filter::Bilinear) { + NearestNeighborFast(impl->intermediate_src, impl->intermediate_dst, src_extent_x, + src_extent_y, dst_extent_x, dst_extent_y); + } else { + Bilinear(impl->intermediate_src, impl->intermediate_dst, src_extent_x, src_extent_y, + dst_extent_x, dst_extent_y); + } + + auto* output_converter = impl->converter_factory.GetFormatConverter(dst.format); + output_converter->ConvertFrom(impl->intermediate_dst, impl->dst_buffer); + }; + + // Do actuall Blit + + impl->dst_buffer.resize(dst_copy_size); + if (src.linear == Fermi2D::MemoryLayout::BlockLinear) { + UnswizzleSubrect(impl->src_buffer, impl->tmp_buffer, src_bytes_per_pixel, src.width, + src.height, src.depth, config.src_x0, config.src_y0, src_extent_x, + src_extent_y, src.block_height, src.block_depth, + src_extent_x * src_bytes_per_pixel); + } else { + process_pitch_linear(false, impl->tmp_buffer, impl->src_buffer, src_extent_x, src_extent_y, + src.pitch, config.src_x0, config.src_y0, src_bytes_per_pixel); + } + + // Conversion Phase + if (no_passthrough) { + if (src.format != dst.format || config.filter == Fermi2D::Filter::Bilinear) { + convertion_phase_ir(); + } else { + convertion_phase_same_format(); + } + } else { + impl->dst_buffer.swap(impl->src_buffer); + } + + const size_t dst_size = get_surface_size(dst, dst_bytes_per_pixel); + impl->tmp_buffer.resize(dst_size); + memory_manager.ReadBlock(dst.Address(), impl->tmp_buffer.data(), dst_size); + + if (dst.linear == Fermi2D::MemoryLayout::BlockLinear) { + SwizzleSubrect(impl->tmp_buffer, impl->dst_buffer, dst_bytes_per_pixel, dst.width, + dst.height, dst.depth, config.dst_x0, config.dst_y0, dst_extent_x, + dst_extent_y, dst.block_height, dst.block_depth, + dst_extent_x * dst_bytes_per_pixel); + } else { + process_pitch_linear(true, impl->dst_buffer, impl->tmp_buffer, dst_extent_x, dst_extent_y, + dst.pitch, config.dst_x0, config.dst_y0, + static_cast<size_t>(dst_bytes_per_pixel)); + } + memory_manager.WriteBlock(dst.Address(), impl->tmp_buffer.data(), dst_size); + return true; +} + +} // namespace Tegra::Engines::Blitter |