ShuriZma
/
duckstation
mirror of https://github.com/stenzek/duckstation
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

GPU/HW: Add Scale2x/Scale3x texture filters

This commit is contained in:
Stenzek 2025-04-08 19:50:38 +10:00
parent 6e02133452
commit 7971bb949b
No known key found for this signature in database
3 changed files with 101 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

94
src/core/gpu_hw_shadergen.cpp
View File

@ -1,4 +1,4 @@
// SPDX-FileCopyrightText: 2019-2024 Connor McLaughlin <stenzek@gmail.com>
// SPDX-FileCopyrightText: 2019-2025 Connor McLaughlin <stenzek@gmail.com>
// SPDX-License-Identifier: CC-BY-NC-ND-4.0
//
// NOTE: Some parts of this file have more permissive licenses. They are marked appropriately.
@ -831,6 +831,98 @@ void FilteredSampleFromVRAM(TEXPAGE_VALUE texpage, float2 coords, float4 uv_limi
texcol = unpackUnorm4x8(res);
}
#undef src
)";
}
else if (texture_filter == GPUTextureFilter::Scale2x)
{
// Based on https://www.scale2x.it/algorithm
ss << R"(
#define src(xoffs, yoffs) packUnorm4x8(SampleFromVRAM(texpage, clamp(bcoords + float2((xoffs), (yoffs)), uv_limits.xy, uv_limits.zw)))
void FilteredSampleFromVRAM(TEXPAGE_VALUE texpage, float2 coords, float4 uv_limits, out float4 texcol, out float ialpha)
{
float2 bcoords = floor(coords);
uint E = src(+0, +0);
uint B = src(+0, - 1);
uint D = src(-1, +0);
uint F = src(+1, +0);
uint H = src(+0, +1);
uint J = (D == B && B != F && D != H) ? D : E;
uint K = (B == F && D != F && H != F) ? F : E;
uint L = (H == D && F != D && B != D) ? D : E;
uint M = (H == F && D != H && B != F) ? F : E;
// select quadrant based on fractional part of texture coordinates
float2 fpart = frac(coords);
uint res = (fpart.x < 0.5f) ? ((fpart.y < 0.5f) ? J : L) : ((fpart.y < 0.5f) ? K : M);
ialpha = float(res != 0u);
texcol = unpackUnorm4x8(res);
}
#undef src
)";
}
else if (texture_filter == GPUTextureFilter::Scale3x)
{
// Based on https://www.scale2x.it/algorithm
ss << R"(
#define src(xoffs, yoffs) packUnorm4x8(SampleFromVRAM(texpage, clamp(bcoords + float2((xoffs), (yoffs)), uv_limits.xy, uv_limits.zw)))
void FilteredSampleFromVRAM(TEXPAGE_VALUE texpage, float2 coords, float4 uv_limits, out float4 texcol, out float ialpha)
{
float2 bcoords = floor(coords);
uint E = src(+0, +0);
uint B = src(+0, -1);
uint D = src(-1, +0);
uint F = src(+1, +0);
uint H = src(+0, +1);
uint res = E;
if (B != H && D != F) {
uint A = src(-1, -1);
uint C = src(+1, -1);
uint G = src(-1, +1);
uint I = src(+1, +1);
uint E0 = (D == B) ? D : E;
uint E1 = (D == B && E != C) || (B == F && E != A) ? B : E;
uint E2 = (B == F) ? F : E;
uint E3 = (D == B && E != G) || (D == H && E != A) ? D : E;
uint E4 = E;
uint E5 = (B == F && E != I) || (H == F && E != C) ? F : E;
uint E6 = (D == H) ? D : E;
uint E7 = (D == H && E != I) || (H == F && E != G) ? H : E;
uint E8 = (H == F) ? F : E;
// select quadrant based on fractional part of texture coordinates
float2 fpart = frac(coords);
uint R0, R1, R2;
if (fpart.y < 0.34f) {
R0 = E0;
R1 = E1;
R2 = E2;
} else if (fpart.y < 0.67f) {
R0 = E3;
R1 = E4;
R2 = E5;
} else {
R0 = E6;
R1 = E7;
R2 = E8;
}
res = (fpart.x < 0.34f) ? R0 : ((fpart.x < 0.67f) ? R1 : R2);
}
ialpha = float(res != 0u);
texcol = unpackUnorm4x8(res);
}
#undef src
)";
}

7
src/core/settings.cpp
View File

@ -1531,7 +1531,8 @@ GPURenderer Settings::GetAutomaticRenderer()
}
static constexpr const std::array s_texture_filter_names = {
"Nearest", "Bilinear", "BilinearBinAlpha", "JINC2", "JINC2BinAlpha", "xBR", "xBRBinAlpha", "MMPX",
"Nearest", "Bilinear", "BilinearBinAlpha", "JINC2", "JINC2BinAlpha",
"xBR", "xBRBinAlpha", "Scale2x", "Scale3x", "MMPX",
};
static constexpr const std::array s_texture_filter_display_names = {
TRANSLATE_DISAMBIG_NOOP("Settings", "Nearest-Neighbor", "GPUTextureFilter"),
@ -1541,8 +1542,12 @@ static constexpr const std::array s_texture_filter_display_names = {
TRANSLATE_DISAMBIG_NOOP("Settings", "JINC2 (Slow, No Edge Blending)", "GPUTextureFilter"),
TRANSLATE_DISAMBIG_NOOP("Settings", "xBR (Very Slow)", "GPUTextureFilter"),
TRANSLATE_DISAMBIG_NOOP("Settings", "xBR (Very Slow, No Edge Blending)", "GPUTextureFilter"),
TRANSLATE_DISAMBIG_NOOP("Settings", "Scale2x (EPX)", "GPUTextureFilter"),
TRANSLATE_DISAMBIG_NOOP("Settings", "Scale3x (Slow)", "GPUTextureFilter"),
TRANSLATE_DISAMBIG_NOOP("Settings", "MMPX (Slow)", "GPUTextureFilter"),
};
static_assert(s_texture_filter_names.size() == static_cast<size_t>(GPUTextureFilter::Count));
static_assert(s_texture_filter_display_names.size() == static_cast<size_t>(GPUTextureFilter::Count));
std::optional<GPUTextureFilter> Settings::ParseTextureFilterName(const char* str)
{

2
src/core/types.h
View File

@ -97,6 +97,8 @@ enum class GPUTextureFilter : u8
JINC2BinAlpha,
xBR,
xBRBinAlpha,
Scale2x,
Scale3x,
MMPX,
Count
};