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author | comex <comexk@gmail.com> | 2023-07-02 00:01:11 +0200 |
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committer | comex <comexk@gmail.com> | 2023-07-02 00:01:11 +0200 |
commit | 98685d48e3cb9f25f6919f004ec62cadf33afad2 (patch) | |
tree | 9df2ce7f57370641589bfae7196c77b090bcbe0f /src/video_core/texture_cache/decode_bc4.cpp | |
parent | PR feedback + constification (diff) | |
parent | Update translations (2023-07-01) (#10972) (diff) | |
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Diffstat (limited to '')
-rw-r--r-- | src/video_core/texture_cache/decode_bc4.cpp | 96 |
1 files changed, 0 insertions, 96 deletions
diff --git a/src/video_core/texture_cache/decode_bc4.cpp b/src/video_core/texture_cache/decode_bc4.cpp deleted file mode 100644 index ef98afdca..000000000 --- a/src/video_core/texture_cache/decode_bc4.cpp +++ /dev/null @@ -1,96 +0,0 @@ -// SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project -// SPDX-License-Identifier: GPL-2.0-or-later - -#include <algorithm> -#include <array> -#include <span> - -#include "common/assert.h" -#include "common/common_types.h" -#include "video_core/texture_cache/decode_bc4.h" -#include "video_core/texture_cache/types.h" - -namespace VideoCommon { - -// https://www.khronos.org/registry/OpenGL/extensions/ARB/ARB_texture_compression_rgtc.txt -[[nodiscard]] constexpr u32 DecompressBlock(u64 bits, u32 x, u32 y) { - const u32 code_offset = 16 + 3 * (4 * y + x); - const u32 code = (bits >> code_offset) & 7; - const u32 red0 = (bits >> 0) & 0xff; - const u32 red1 = (bits >> 8) & 0xff; - if (red0 > red1) { - switch (code) { - case 0: - return red0; - case 1: - return red1; - case 2: - return (6 * red0 + 1 * red1) / 7; - case 3: - return (5 * red0 + 2 * red1) / 7; - case 4: - return (4 * red0 + 3 * red1) / 7; - case 5: - return (3 * red0 + 4 * red1) / 7; - case 6: - return (2 * red0 + 5 * red1) / 7; - case 7: - return (1 * red0 + 6 * red1) / 7; - } - } else { - switch (code) { - case 0: - return red0; - case 1: - return red1; - case 2: - return (4 * red0 + 1 * red1) / 5; - case 3: - return (3 * red0 + 2 * red1) / 5; - case 4: - return (2 * red0 + 3 * red1) / 5; - case 5: - return (1 * red0 + 4 * red1) / 5; - case 6: - return 0; - case 7: - return 0xff; - } - } - return 0; -} - -void DecompressBC4(std::span<const u8> input, Extent3D extent, std::span<u8> output) { - UNIMPLEMENTED_IF_MSG(extent.width % 4 != 0, "Unaligned width={}", extent.width); - UNIMPLEMENTED_IF_MSG(extent.height % 4 != 0, "Unaligned height={}", extent.height); - static constexpr u32 BLOCK_SIZE = 4; - size_t input_offset = 0; - for (u32 slice = 0; slice < extent.depth; ++slice) { - for (u32 block_y = 0; block_y < extent.height / 4; ++block_y) { - for (u32 block_x = 0; block_x < extent.width / 4; ++block_x) { - u64 bits; - std::memcpy(&bits, &input[input_offset], sizeof(bits)); - input_offset += sizeof(bits); - - for (u32 y = 0; y < BLOCK_SIZE; ++y) { - for (u32 x = 0; x < BLOCK_SIZE; ++x) { - const u32 linear_z = slice; - const u32 linear_y = block_y * BLOCK_SIZE + y; - const u32 linear_x = block_x * BLOCK_SIZE + x; - const u32 offset_z = linear_z * extent.width * extent.height; - const u32 offset_y = linear_y * extent.width; - const u32 offset_x = linear_x; - const u32 output_offset = (offset_z + offset_y + offset_x) * 4ULL; - const u32 color = DecompressBlock(bits, x, y); - output[output_offset + 0] = static_cast<u8>(color); - output[output_offset + 1] = 0; - output[output_offset + 2] = 0; - output[output_offset + 3] = 0xff; - } - } - } - } - } -} - -} // namespace VideoCommon |