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Implement EFB copy filter and gamma in hardware backends

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Also makes y_scale a dynamic parameter for EFB copies, as it doesn't
make sense to keep it as part of the uid, otherwise we're generating
redundant shaders.
This commit is contained in:
Stenzek
2018-04-29 18:52:30 +10:00
parent a192a3bb30
commit 9e798eec94
41 changed files with 526 additions and 236 deletions
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33
Source/Core/VideoBackends/Software/EfbInterface.cpp
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@ -502,6 +502,23 @@ static u32 VerticalFilter(const std::array<u32, 3>& colors,
return out_color32;
}
static u32 GammaCorrection(u32 color, const float gamma_rcp)
{
u8 in_colors[4];
std::memcpy(&in_colors, &color, sizeof(in_colors));
u8 out_color[4];
for (int i = BLU_C; i <= RED_C; i++)
{
out_color[i] = static_cast<u8>(
MathUtil::Clamp(std::pow(in_colors[i] / 255.0f, gamma_rcp) * 255.0f, 0.0f, 255.0f));
}
u32 out_color32;
std::memcpy(&out_color32, out_color, sizeof(out_color32));
return out_color32;
}
// For internal used only, return a non-normalized value, which saves work later.
static yuv444 ConvertColorToYUV(u32 color)
{
@ -530,8 +547,7 @@ u8* GetPixelPointer(u16 x, u16 y, bool depth)
}
void EncodeXFB(u8* xfb_in_ram, u32 memory_stride, const EFBRectangle& source_rect, float y_scale,
bool clamp_top, bool clamp_bottom, float Gamma,
const std::array<u8, 7>& filterCoefficients)
float gamma)
{
if (!xfb_in_ram)
{
@ -539,8 +555,12 @@ void EncodeXFB(u8* xfb_in_ram, u32 memory_stride, const EFBRectangle& source_rec
return;
}
int left = source_rect.left;
int right = source_rect.right;
const int left = source_rect.left;
const int right = source_rect.right;
const bool clamp_top = bpmem.triggerEFBCopy.clamp_top;
const bool clamp_bottom = bpmem.triggerEFBCopy.clamp_bottom;
const float gamma_rcp = 1.0f / gamma;
const auto filter_coefficients = bpmem.copyfilter.GetCoefficients();
// this assumes copies will always start on an even (YU) pixel and the
// copy always has an even width, which might not be true.
@ -575,9 +595,10 @@ void EncodeXFB(u8* xfb_in_ram, u32 memory_stride, const EFBRectangle& source_rec
std::array<u32, 3> colors = {{GetColor(x, y_prev), GetColor(x, y), GetColor(x, y_next)}};
// Vertical Filter (Multisampling resolve, deflicker, brightness)
u32 filtered = VerticalFilter(colors, filterCoefficients);
u32 filtered = VerticalFilter(colors, filter_coefficients);
// TODO: Gamma correction happens here.
// Gamma correction happens here.
filtered = GammaCorrection(filtered, gamma_rcp);
scanline[i] = ConvertColorToYUV(filtered);
}