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Diffstat (limited to 'src/video_core/texture_cache/decode_bc.cpp')
-rw-r--r-- | src/video_core/texture_cache/decode_bc.cpp | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/src/video_core/texture_cache/decode_bc.cpp b/src/video_core/texture_cache/decode_bc.cpp new file mode 100644 index 000000000..3e26474a3 --- /dev/null +++ b/src/video_core/texture_cache/decode_bc.cpp @@ -0,0 +1,129 @@ +// SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project +// SPDX-License-Identifier: GPL-2.0-or-later + +#include <algorithm> +#include <array> +#include <span> +#include <bc_decoder.h> + +#include "common/common_types.h" +#include "video_core/texture_cache/decode_bc.h" + +namespace VideoCommon { + +namespace { +constexpr u32 BLOCK_SIZE = 4; + +using VideoCore::Surface::PixelFormat; + +constexpr bool IsSigned(PixelFormat pixel_format) { + switch (pixel_format) { + case PixelFormat::BC4_SNORM: + case PixelFormat::BC4_UNORM: + case PixelFormat::BC5_SNORM: + case PixelFormat::BC5_UNORM: + case PixelFormat::BC6H_SFLOAT: + case PixelFormat::BC6H_UFLOAT: + return true; + default: + return false; + } +} + +constexpr u32 BlockSize(PixelFormat pixel_format) { + switch (pixel_format) { + case PixelFormat::BC1_RGBA_SRGB: + case PixelFormat::BC1_RGBA_UNORM: + case PixelFormat::BC4_SNORM: + case PixelFormat::BC4_UNORM: + return 8; + default: + return 16; + } +} +} // Anonymous namespace + +u32 ConvertedBytesPerBlock(VideoCore::Surface::PixelFormat pixel_format) { + switch (pixel_format) { + case PixelFormat::BC4_SNORM: + case PixelFormat::BC4_UNORM: + return 1; + case PixelFormat::BC5_SNORM: + case PixelFormat::BC5_UNORM: + return 2; + case PixelFormat::BC6H_SFLOAT: + case PixelFormat::BC6H_UFLOAT: + return 8; + default: + return 4; + } +} + +template <auto decompress, PixelFormat pixel_format> +void DecompressBlocks(std::span<const u8> input, std::span<u8> output, Extent3D extent, + bool is_signed = false) { + const u32 out_bpp = ConvertedBytesPerBlock(pixel_format); + const u32 block_width = std::min(extent.width, BLOCK_SIZE); + const u32 block_height = std::min(extent.height, BLOCK_SIZE); + const u32 pitch = extent.width * out_bpp; + size_t input_offset = 0; + size_t output_offset = 0; + for (u32 slice = 0; slice < extent.depth; ++slice) { + for (u32 y = 0; y < extent.height; y += block_height) { + size_t row_offset = 0; + for (u32 x = 0; x < extent.width; + x += block_width, row_offset += block_width * out_bpp) { + const u8* src = input.data() + input_offset; + u8* const dst = output.data() + output_offset + row_offset; + if constexpr (IsSigned(pixel_format)) { + decompress(src, dst, x, y, extent.width, extent.height, is_signed); + } else { + decompress(src, dst, x, y, extent.width, extent.height); + } + input_offset += BlockSize(pixel_format); + } + output_offset += block_height * pitch; + } + } +} + +void DecompressBCn(std::span<const u8> input, std::span<u8> output, Extent3D extent, + VideoCore::Surface::PixelFormat pixel_format) { + switch (pixel_format) { + case PixelFormat::BC1_RGBA_UNORM: + case PixelFormat::BC1_RGBA_SRGB: + DecompressBlocks<bcn::DecodeBc1, PixelFormat::BC1_RGBA_UNORM>(input, output, extent); + break; + case PixelFormat::BC2_UNORM: + case PixelFormat::BC2_SRGB: + DecompressBlocks<bcn::DecodeBc2, PixelFormat::BC2_UNORM>(input, output, extent); + break; + case PixelFormat::BC3_UNORM: + case PixelFormat::BC3_SRGB: + DecompressBlocks<bcn::DecodeBc3, PixelFormat::BC3_UNORM>(input, output, extent); + break; + case PixelFormat::BC4_SNORM: + case PixelFormat::BC4_UNORM: + DecompressBlocks<bcn::DecodeBc4, PixelFormat::BC4_UNORM>( + input, output, extent, pixel_format == PixelFormat::BC4_SNORM); + break; + case PixelFormat::BC5_SNORM: + case PixelFormat::BC5_UNORM: + DecompressBlocks<bcn::DecodeBc5, PixelFormat::BC5_UNORM>( + input, output, extent, pixel_format == PixelFormat::BC5_SNORM); + break; + case PixelFormat::BC6H_SFLOAT: + case PixelFormat::BC6H_UFLOAT: + DecompressBlocks<bcn::DecodeBc6, PixelFormat::BC6H_UFLOAT>( + input, output, extent, pixel_format == PixelFormat::BC6H_SFLOAT); + break; + case PixelFormat::BC7_SRGB: + case PixelFormat::BC7_UNORM: + DecompressBlocks<bcn::DecodeBc7, PixelFormat::BC7_UNORM>(input, output, extent); + break; + default: + LOG_WARNING(HW_GPU, "Unimplemented BCn decompression {}", pixel_format); + } +} + +} // namespace VideoCommon |