From d7db0881808376864eb71eb5dde8b651a5cf891d Mon Sep 17 00:00:00 2001 From: ReinUsesLisp Date: Tue, 7 Apr 2020 20:38:14 -0300 Subject: [PATCH] video_core/texture: Use a LUT to convert sRGB texture borders This is a reversed look up table extracted from https://gist.github.com/rygorous/2203834#file-gistfile1-cpp-L41-L62 that is used in https://github.com/devkitPro/deko3d/blob/04d4e9e587fa3dc5447b43d273bc45f440226e41/source/maxwell/tsc_generate.cpp#L38 Games usually bind 0xFD expecting a float texture border of 1.0f. The conversion previous to this commit was multiplying the uint8 sRGB texture border color by 255. This is close to 1.0f but when that difference matters, some graphical glitches appear. This look up table is manually changed in the edges, clamping towards 0.0f and 1.0f. While we are at it, move this logic to its own translation unit. --- src/video_core/CMakeLists.txt | 1 + src/video_core/textures/texture.cpp | 58 +++++++++++++++++++++++++++++ src/video_core/textures/texture.h | 11 +----- 3 files changed, 61 insertions(+), 9 deletions(-) create mode 100644 src/video_core/textures/texture.cpp diff --git a/src/video_core/CMakeLists.txt b/src/video_core/CMakeLists.txt index effe76a63f..f7febd6a29 100644 --- a/src/video_core/CMakeLists.txt +++ b/src/video_core/CMakeLists.txt @@ -148,6 +148,7 @@ add_library(video_core STATIC textures/convert.h textures/decoders.cpp textures/decoders.h + textures/texture.cpp textures/texture.h video_core.cpp video_core.h diff --git a/src/video_core/textures/texture.cpp b/src/video_core/textures/texture.cpp new file mode 100644 index 0000000000..b1417db1ef --- /dev/null +++ b/src/video_core/textures/texture.cpp @@ -0,0 +1,58 @@ +// Copyright 2020 yuzu Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#include + +#include "video_core/textures/texture.h" + +namespace Tegra::Texture { + +namespace { + +constexpr std::array SRGB_CONVERSION_LUT = { + 0.000000f, 0.000000f, 0.000000f, 0.000012f, 0.000021f, 0.000033f, 0.000046f, 0.000062f, + 0.000081f, 0.000102f, 0.000125f, 0.000151f, 0.000181f, 0.000214f, 0.000251f, 0.000293f, + 0.000338f, 0.000388f, 0.000443f, 0.000503f, 0.000568f, 0.000639f, 0.000715f, 0.000798f, + 0.000887f, 0.000983f, 0.001085f, 0.001195f, 0.001312f, 0.001437f, 0.001569f, 0.001710f, + 0.001860f, 0.002019f, 0.002186f, 0.002364f, 0.002551f, 0.002748f, 0.002955f, 0.003174f, + 0.003403f, 0.003643f, 0.003896f, 0.004160f, 0.004436f, 0.004725f, 0.005028f, 0.005343f, + 0.005672f, 0.006015f, 0.006372f, 0.006744f, 0.007130f, 0.007533f, 0.007950f, 0.008384f, + 0.008834f, 0.009301f, 0.009785f, 0.010286f, 0.010805f, 0.011342f, 0.011898f, 0.012472f, + 0.013066f, 0.013680f, 0.014313f, 0.014967f, 0.015641f, 0.016337f, 0.017054f, 0.017793f, + 0.018554f, 0.019337f, 0.020144f, 0.020974f, 0.021828f, 0.022706f, 0.023609f, 0.024536f, + 0.025489f, 0.026468f, 0.027473f, 0.028504f, 0.029563f, 0.030649f, 0.031762f, 0.032904f, + 0.034074f, 0.035274f, 0.036503f, 0.037762f, 0.039050f, 0.040370f, 0.041721f, 0.043103f, + 0.044518f, 0.045964f, 0.047444f, 0.048956f, 0.050503f, 0.052083f, 0.053699f, 0.055349f, + 0.057034f, 0.058755f, 0.060513f, 0.062307f, 0.064139f, 0.066008f, 0.067915f, 0.069861f, + 0.071845f, 0.073869f, 0.075933f, 0.078037f, 0.080182f, 0.082369f, 0.084597f, 0.086867f, + 0.089180f, 0.091535f, 0.093935f, 0.096378f, 0.098866f, 0.101398f, 0.103977f, 0.106601f, + 0.109271f, 0.111988f, 0.114753f, 0.117565f, 0.120426f, 0.123335f, 0.126293f, 0.129301f, + 0.132360f, 0.135469f, 0.138629f, 0.141841f, 0.145105f, 0.148421f, 0.151791f, 0.155214f, + 0.158691f, 0.162224f, 0.165810f, 0.169453f, 0.173152f, 0.176907f, 0.180720f, 0.184589f, + 0.188517f, 0.192504f, 0.196549f, 0.200655f, 0.204820f, 0.209046f, 0.213334f, 0.217682f, + 0.222093f, 0.226567f, 0.231104f, 0.235704f, 0.240369f, 0.245099f, 0.249894f, 0.254754f, + 0.259681f, 0.264674f, 0.269736f, 0.274864f, 0.280062f, 0.285328f, 0.290664f, 0.296070f, + 0.301546f, 0.307094f, 0.312713f, 0.318404f, 0.324168f, 0.330006f, 0.335916f, 0.341902f, + 0.347962f, 0.354097f, 0.360309f, 0.366597f, 0.372961f, 0.379403f, 0.385924f, 0.392524f, + 0.399202f, 0.405960f, 0.412798f, 0.419718f, 0.426719f, 0.433802f, 0.440967f, 0.448216f, + 0.455548f, 0.462965f, 0.470465f, 0.478052f, 0.485725f, 0.493484f, 0.501329f, 0.509263f, + 0.517285f, 0.525396f, 0.533595f, 0.541885f, 0.550265f, 0.558736f, 0.567299f, 0.575954f, + 0.584702f, 0.593542f, 0.602477f, 0.611507f, 0.620632f, 0.629852f, 0.639168f, 0.648581f, + 0.658092f, 0.667700f, 0.677408f, 0.687214f, 0.697120f, 0.707127f, 0.717234f, 0.727443f, + 0.737753f, 0.748167f, 0.758685f, 0.769305f, 0.780031f, 0.790861f, 0.801798f, 0.812839f, + 0.823989f, 0.835246f, 0.846611f, 0.858085f, 0.869668f, 0.881360f, 0.893164f, 0.905078f, + 0.917104f, 0.929242f, 0.941493f, 0.953859f, 0.966338f, 1.000000f, 1.000000f, 1.000000f, +}; + +} // Anonymous namespace + +std::array TSCEntry::GetBorderColor() const noexcept { + if (!srgb_conversion) { + return border_color; + } + return {SRGB_CONVERSION_LUT[srgb_border_color_r], SRGB_CONVERSION_LUT[srgb_border_color_g], + SRGB_CONVERSION_LUT[srgb_border_color_b], border_color[3]}; +} + +} // namespace Tegra::Texture diff --git a/src/video_core/textures/texture.h b/src/video_core/textures/texture.h index 7edc4abe1a..262cd3cc1e 100644 --- a/src/video_core/textures/texture.h +++ b/src/video_core/textures/texture.h @@ -336,6 +336,8 @@ struct TSCEntry { std::array raw; }; + std::array GetBorderColor() const noexcept; + float GetMaxAnisotropy() const { const u32 min_value = [] { switch (static_cast(Settings::values.max_anisotropy)) { @@ -368,15 +370,6 @@ struct TSCEntry { constexpr u32 mask = 1U << (13 - 1); return static_cast(static_cast((mip_lod_bias ^ mask) - mask)) / 256.0f; } - - std::array GetBorderColor() const { - if (srgb_conversion) { - return {static_cast(srgb_border_color_r) / 255.0f, - static_cast(srgb_border_color_g) / 255.0f, - static_cast(srgb_border_color_b) / 255.0f, border_color[3]}; - } - return border_color; - } }; static_assert(sizeof(TSCEntry) == 0x20, "TSCEntry has wrong size");