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// Copyright 2019 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include <cstring>
#include <tuple>
#include <vector>
#include "common/assert.h"
#include "common/common_types.h"
#include "common/logging/log.h"
#include "video_core/surface.h"
#include "video_core/textures/astc.h"
#include "video_core/textures/convert.h"
namespace Tegra::Texture {
using VideoCore::Surface::PixelFormat;
template <bool reverse>
void SwapS8Z24ToZ24S8(u8* data, u32 width, u32 height) {
union S8Z24 {
BitField<0, 24, u32> z24;
BitField<24, 8, u32> s8;
};
static_assert(sizeof(S8Z24) == 4, "S8Z24 is incorrect size");
union Z24S8 {
BitField<0, 8, u32> s8;
BitField<8, 24, u32> z24;
};
static_assert(sizeof(Z24S8) == 4, "Z24S8 is incorrect size");
S8Z24 s8z24_pixel{};
Z24S8 z24s8_pixel{};
constexpr auto bpp{
VideoCore::Surface::GetBytesPerPixel(VideoCore::Surface::PixelFormat::S8Z24)};
for (std::size_t y = 0; y < height; ++y) {
for (std::size_t x = 0; x < width; ++x) {
const std::size_t offset{bpp * (y * width + x)};
if constexpr (reverse) {
std::memcpy(&z24s8_pixel, &data[offset], sizeof(Z24S8));
s8z24_pixel.s8.Assign(z24s8_pixel.s8);
s8z24_pixel.z24.Assign(z24s8_pixel.z24);
std::memcpy(&data[offset], &s8z24_pixel, sizeof(S8Z24));
} else {
std::memcpy(&s8z24_pixel, &data[offset], sizeof(S8Z24));
z24s8_pixel.s8.Assign(s8z24_pixel.s8);
z24s8_pixel.z24.Assign(s8z24_pixel.z24);
std::memcpy(&data[offset], &z24s8_pixel, sizeof(Z24S8));
}
}
}
}
static void ConvertS8Z24ToZ24S8(u8* data, u32 width, u32 height) {
SwapS8Z24ToZ24S8<false>(data, width, height);
}
static void ConvertZ24S8ToS8Z24(u8* data, u32 width, u32 height) {
SwapS8Z24ToZ24S8<true>(data, width, height);
}
void ConvertFromGuestToHost(u8* data, PixelFormat pixel_format, u32 width, u32 height, u32 depth,
bool convert_astc, bool convert_s8z24) {
if (convert_astc && IsPixelFormatASTC(pixel_format)) {
// Convert ASTC pixel formats to RGBA8, as most desktop GPUs do not support ASTC.
u32 block_width{};
u32 block_height{};
std::tie(block_width, block_height) = GetASTCBlockSize(pixel_format);
const std::vector<u8> rgba8_data =
Tegra::Texture::ASTC::Decompress(data, width, height, depth, block_width, block_height);
std::copy(rgba8_data.begin(), rgba8_data.end(), data);
} else if (convert_s8z24 && pixel_format == PixelFormat::S8Z24) {
Tegra::Texture::ConvertS8Z24ToZ24S8(data, width, height);
}
}
void ConvertFromHostToGuest(u8* data, PixelFormat pixel_format, u32 width, u32 height, u32 depth,
bool convert_astc, bool convert_s8z24) {
if (convert_astc && IsPixelFormatASTC(pixel_format)) {
LOG_CRITICAL(HW_GPU, "Conversion of format {} after texture flushing is not implemented",
static_cast<u32>(pixel_format));
UNREACHABLE();
} else if (convert_s8z24 && pixel_format == PixelFormat::S8Z24) {
Tegra::Texture::ConvertZ24S8ToS8Z24(data, width, height);
}
}
} // namespace Tegra::Texture
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