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[maxwell/fermi_2d] gutter entire Software blitter 

Signed-off-by: lizzie <lizzie@eden-emu.dev>
This commit is contained in:
lizzie 2026-01-30 10:13:27 +00:00 committed by crueter
parent 2b7b44c3e4
commit d3ed681bc1
7 changed files with 3 additions and 1550 deletions
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4
src/video_core/CMakeLists.txt
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@ -37,10 +37,6 @@ add_library(video_core STATIC
dirty_flags.h
dma_pusher.cpp
dma_pusher.h
engines/sw_blitter/blitter.cpp
engines/sw_blitter/blitter.h
engines/sw_blitter/converter.cpp
engines/sw_blitter/converter.h
engines/const_buffer_info.h
engines/draw_manager.cpp
engines/draw_manager.h

8
src/video_core/engines/fermi_2d.cpp
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@ -7,7 +7,6 @@
#include "common/assert.h"
#include "common/logging/log.h"
#include "video_core/engines/fermi_2d.h"
#include "video_core/engines/sw_blitter/blitter.h"
#include "video_core/memory_manager.h"
#include "video_core/rasterizer_interface.h"
#include "video_core/surface.h"
@ -21,7 +20,6 @@ namespace Tegra::Engines {
using namespace Texture;
Fermi2D::Fermi2D(MemoryManager& memory_manager_) : memory_manager{memory_manager_} {
sw_blitter = std::make_unique<Blitter::SoftwareBlitEngine>(memory_manager);
// Nvidia's OpenGL driver seems to assume these values
regs.src.depth = 1;
regs.dst.depth = 1;
@ -112,9 +110,9 @@ void Fermi2D::Blit() {
}
memory_manager.FlushCaching();
if (!rasterizer->AccelerateSurfaceCopy(src, regs.dst, config)) {
sw_blitter->Blit(src, regs.dst, config);
}
bool was_accelerated = rasterizer->AccelerateSurfaceCopy(src, regs.dst, config);
ASSERT(was_accelerated && "Backend must always accelerate copies/blits");
}
} // namespace Tegra::Engines

1
src/video_core/engines/fermi_2d.h
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@ -304,7 +304,6 @@ public:
private:
VideoCore::RasterizerInterface* rasterizer = nullptr;
std::unique_ptr<Blitter::SoftwareBlitEngine> sw_blitter;
MemoryManager& memory_manager;
/// Performs the copy from the source surface to the destination surface as configured in the

240
src/video_core/engines/sw_blitter/blitter.cpp
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@ -1,240 +0,0 @@
// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
// SPDX-License-Identifier: GPL-3.0-or-later
#include <algorithm>
#include <cmath>
#include <vector>
#include "common/scratch_buffer.h"
#include "video_core/engines/sw_blitter/blitter.h"
#include "video_core/engines/sw_blitter/converter.h"
#include "video_core/guest_memory.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);
}
}
}
template <bool unpack>
void ProcessPitchLinear(std::span<const u8> input, std::span<u8> output, size_t extent_x,
size_t 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 (size_t y = 0; y < extent_y; y++) {
const size_t first_offset = (y + y0) * 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);
}
}
} // namespace
struct SoftwareBlitEngine::BlitEngineImpl {
Common::ScratchBuffer<u8> tmp_buffer;
Common::ScratchBuffer<u8> src_buffer;
Common::ScratchBuffer<u8> dst_buffer;
Common::ScratchBuffer<f32> intermediate_src;
Common::ScratchBuffer<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 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);
Tegra::Memory::GpuGuestMemory<u8, Tegra::Memory::GuestMemoryFlags::SafeRead> tmp_buffer(
memory_manager, src.Address(), src_size, &impl->tmp_buffer);
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_destructive(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 conversion_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 conversion_phase_ir = [&]() {
auto* input_converter = impl->converter_factory.GetFormatConverter(src.format);
impl->intermediate_src.resize_destructive((src_copy_size / src_bytes_per_pixel) *
ir_components);
impl->intermediate_dst.resize_destructive((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 actual Blit
impl->dst_buffer.resize_destructive(dst_copy_size);
if (src.linear == Fermi2D::MemoryLayout::BlockLinear) {
UnswizzleSubrect(impl->src_buffer, 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 {
ProcessPitchLinear<false>(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) {
conversion_phase_ir();
} else {
conversion_phase_same_format();
}
} else {
impl->dst_buffer.swap(impl->src_buffer);
}
const size_t dst_size = get_surface_size(dst, dst_bytes_per_pixel);
Tegra::Memory::GpuGuestMemoryScoped<u8, Tegra::Memory::GuestMemoryFlags::SafeReadWrite>
tmp_buffer2(memory_manager, dst.Address(), dst_size, &impl->tmp_buffer);
if (dst.linear == Fermi2D::MemoryLayout::BlockLinear) {
SwizzleSubrect(tmp_buffer2, 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 {
ProcessPitchLinear<true>(impl->dst_buffer, tmp_buffer2, dst_extent_x, dst_extent_y,
dst.pitch, config.dst_x0, config.dst_y0,
static_cast<size_t>(dst_bytes_per_pixel));
}
return true;
}
} // namespace Tegra::Engines::Blitter

27
src/video_core/engines/sw_blitter/blitter.h
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@ -1,27 +0,0 @@
// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
// SPDX-License-Identifier: GPL-3.0-or-later
#pragma once
#include "video_core/engines/fermi_2d.h"
namespace Tegra {
class MemoryManager;
}
namespace Tegra::Engines::Blitter {
class SoftwareBlitEngine {
public:
explicit SoftwareBlitEngine(MemoryManager& memory_manager_);
~SoftwareBlitEngine();
bool Blit(Fermi2D::Surface& src, Fermi2D::Surface& dst, Fermi2D::Config& copy_config);
private:
MemoryManager& memory_manager;
struct BlitEngineImpl;
std::unique_ptr<BlitEngineImpl> impl;
};
} // namespace Tegra::Engines::Blitter

1237
src/video_core/engines/sw_blitter/converter.cpp
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36
src/video_core/engines/sw_blitter/converter.h
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@ -1,36 +0,0 @@
// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
// SPDX-License-Identifier: GPL-3.0-or-later
#pragma once
#include <memory>
#include <span>
#include "common/common_types.h"
#include "video_core/gpu.h"
namespace Tegra::Engines::Blitter {
class Converter {
public:
virtual void ConvertTo(std::span<const u8> input, std::span<f32> output) = 0;
virtual void ConvertFrom(std::span<const f32> input, std::span<u8> output) = 0;
virtual ~Converter() = default;
};
class ConverterFactory {
public:
ConverterFactory();
~ConverterFactory();
Converter* GetFormatConverter(RenderTargetFormat format);
private:
Converter* BuildConverter(RenderTargetFormat format);
struct ConverterFactoryImpl;
std::unique_ptr<ConverterFactoryImpl> impl;
};
} // namespace Tegra::Engines::Blitter