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-rw-r--r--src/video_core/engines/sw_blitter/blitter.cpp97
1 files changed, 61 insertions, 36 deletions
diff --git a/src/video_core/engines/sw_blitter/blitter.cpp b/src/video_core/engines/sw_blitter/blitter.cpp
index caf51cbe3..c923a80e9 100644
--- a/src/video_core/engines/sw_blitter/blitter.cpp
+++ b/src/video_core/engines/sw_blitter/blitter.cpp
@@ -1,6 +1,8 @@
// 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"
@@ -22,8 +24,10 @@ using namespace Texture;
namespace {
-void NeighrestNeighbor(std::span<u8> input, std::span<u8> output, u32 src_width, u32 src_height,
- u32 dst_width, u32 dst_height, size_t bpp) {
+constexpr size_t ir_components = 4;
+
+void NeighrestNeighbor(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;
@@ -40,7 +44,7 @@ void NeighrestNeighbor(std::span<u8> input, std::span<u8> output, u32 src_width,
}
}
-void NeighrestNeighborFast(std::span<f32> input, std::span<f32> output, u32 src_width,
+void NeighrestNeighborFast(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));
@@ -48,44 +52,62 @@ void NeighrestNeighborFast(std::span<f32> input, std::span<f32> output, u32 src_
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) * 4;
- const size_t write_to = (y * dst_width + x) * 4;
+ 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) * 4);
+ std::memcpy(&output[write_to], &input[read_from], sizeof(f32) * ir_components);
src_x += dx_du;
}
src_y += dy_dv;
}
}
-/*
-void Bilinear(std::span<f32> input, std::span<f32> output, size_t src_width,
- size_t src_height, size_t dst_width, size_t dst_height) {
- const auto inv_lerp = [](u32 coord, u32 end) { return
-static_cast<f32>(std::min(std::max(static_cast<s32>(coord), 0), end - 1)) / (end); };
-
-
+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++) {
- const f32 ty_0 = inv_lerp(y, dst_extent_y);
- const f32 ty_1 = inv_lerp(y + 1, dst_extent_y);
for (u32 x = 0; x < dst_width; x++) {
- const f32 tx_0 = inv_lerp(x, dst_extent_x);
- const f32 tx_1 = inv_lerp(x + 1, dst_extent_x);
- const std::array<f32, 4> get_pixel = [&](f32 tx, f32 ty, u32 width, u32 height) {
- std::array<f32, 4> result{};
-
- return (std::llround(width * tx) + std::llround(height * ty) * width) * 4;
+ 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);
};
- std::array<f32, 4> result{};
- const size_t read_from = get_pixel(src_width, src_height);
- const size_t write_to = get_pixel(tx_0, ty_0, dst_width, dst_height);
+ 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);
- std::memcpy(&output[write_to], &input[read_from], bpp);
+ 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
@@ -107,8 +129,6 @@ SoftwareBlitEngine::~SoftwareBlitEngine() = default;
bool SoftwareBlitEngine::Blit(Fermi2D::Surface& src, Fermi2D::Surface& dst,
Fermi2D::Config& config) {
- UNIMPLEMENTED_IF(config.filter == Fermi2D::Filter::Bilinear);
-
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,
@@ -116,9 +136,9 @@ bool SoftwareBlitEngine::Blit(Fermi2D::Surface& src, Fermi2D::Surface& dst,
}
return static_cast<size_t>(surface.pitch * surface.height);
};
- const auto process_pitch_linear = [](bool unpack, std::span<u8> input, std::span<u8> output,
- u32 extent_x, u32 extent_y, u32 pitch, u32 x0, u32 y0,
- size_t bpp) {
+ 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++) {
@@ -157,12 +177,17 @@ bool SoftwareBlitEngine::Blit(Fermi2D::Surface& src, Fermi2D::Surface& dst,
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) * 4);
- impl->intermediate_dst.resize((dst_copy_size / dst_bytes_per_pixel) * 4);
+ 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);
- NeighrestNeighborFast(impl->intermediate_src, impl->intermediate_dst, src_extent_x,
- src_extent_y, dst_extent_x, dst_extent_y);
+ if (config.filter != Fermi2D::Filter::Bilinear) {
+ NeighrestNeighborFast(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);
@@ -183,7 +208,7 @@ bool SoftwareBlitEngine::Blit(Fermi2D::Surface& src, Fermi2D::Surface& dst,
// Conversion Phase
if (no_passthrough) {
- if (src.format != dst.format) {
+ if (src.format != dst.format || config.filter == Fermi2D::Filter::Bilinear) {
convertion_phase_ir();
} else {
convertion_phase_same_format();
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-26 08:03:38 +0200