| /* |
| * MVKCodec.cpp |
| * |
| * Copyright (c) 2018-2022 Chip Davis for CodeWeavers |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| |
| #include "MVKCodec.h" |
| |
| #include <algorithm> |
| #include <simd/simd.h> |
| |
| |
| using simd::float3; |
| using simd::float4; |
| using simd::pow; |
| using simd::select; |
| |
| static uint32_t pack_float_to_unorm4x8(float4 x) { |
| return ((((uint8_t)(x.r * 255)) & 0x000000ff) | ((((uint8_t)(x.g * 255)) << 8) & 0x0000ff00) | |
| ((((uint8_t)(x.b * 255)) & 0x00ff0000) << 16) | ((((uint8_t)(x.a * 255)) << 24) & 0xff000000)); |
| } |
| |
| static float3 unpack_unorm565_to_float(uint16_t x) { |
| return simd::make_float3(((x >> 11) & 0x1f) / 31.0f, ((x >> 5) & 0x3f) / 63.0f, (x & 0x1f) / 31.0f); |
| } |
| |
| |
| /** Texture codec for DXTn (i.e. BC[1-3]) compressed data. |
| * |
| * This implementation is largely derived from Wine, from code originally |
| * written by Connor McAdams. |
| */ |
| class MVKDXTnCodec : public MVKCodec { |
| |
| public: |
| |
| void decompress(void* pDest, const void* pSrc, const VkSubresourceLayout& destLayout, const VkSubresourceLayout& srcLayout, VkExtent3D extent) override { |
| VkDeviceSize blockByteCount; |
| const uint8_t* pSrcRow; |
| const uint8_t* pSrcSlice = (const uint8_t*)pSrc; |
| uint8_t* pDestRow; |
| uint8_t* pDestSlice = (uint8_t*)pDest; |
| |
| blockByteCount = isBC1Format(_format) ? 8 : 16; |
| |
| for (uint32_t z = 0; z < extent.depth; ++z) { |
| pSrcRow = pSrcSlice; |
| pDestRow = pDestSlice; |
| for (uint32_t y = 0; y < extent.height; y += 4) { |
| for (uint32_t x = 0; x < extent.width; x += 4) { |
| VkExtent2D blockExtent; |
| blockExtent.width = std::min(extent.width - x, 4u); |
| blockExtent.height = std::min(extent.height - y, 4u); |
| decompressDXTnBlock(pSrcRow + x * (blockByteCount / 4), |
| pDestRow + x * 4, blockExtent, destLayout.rowPitch, _format); |
| } |
| pSrcRow += srcLayout.rowPitch; |
| pDestRow += destLayout.rowPitch * 4; |
| } |
| pSrcSlice += srcLayout.depthPitch; |
| pDestSlice += destLayout.depthPitch; |
| } |
| } |
| |
| /** Constructs an instance. */ |
| MVKDXTnCodec(VkFormat format) : _format(format) {} |
| |
| private: |
| |
| #define constant const |
| #define device |
| #define thread |
| #define MVK_DECOMPRESS_CODE(...) __VA_ARGS__ |
| #include "MVKDXTnCodec.def" |
| #undef MVK_DECOMPRESS_CODE |
| |
| VkFormat _format; |
| }; |
| |
| std::unique_ptr<MVKCodec> mvkCreateCodec(VkFormat format) { |
| switch (format) { |
| case VK_FORMAT_BC1_RGB_UNORM_BLOCK: |
| case VK_FORMAT_BC1_RGB_SRGB_BLOCK: |
| case VK_FORMAT_BC1_RGBA_UNORM_BLOCK: |
| case VK_FORMAT_BC1_RGBA_SRGB_BLOCK: |
| case VK_FORMAT_BC2_UNORM_BLOCK: |
| case VK_FORMAT_BC2_SRGB_BLOCK: |
| case VK_FORMAT_BC3_UNORM_BLOCK: |
| case VK_FORMAT_BC3_SRGB_BLOCK: |
| return std::unique_ptr<MVKCodec>(new MVKDXTnCodec(format)); |
| |
| default: |
| return nullptr; |
| } |
| } |
| |
| bool mvkCanDecodeFormat(VkFormat format) { |
| switch (format) { |
| case VK_FORMAT_BC1_RGB_UNORM_BLOCK: |
| case VK_FORMAT_BC1_RGB_SRGB_BLOCK: |
| case VK_FORMAT_BC1_RGBA_UNORM_BLOCK: |
| case VK_FORMAT_BC1_RGBA_SRGB_BLOCK: |
| case VK_FORMAT_BC2_UNORM_BLOCK: |
| case VK_FORMAT_BC2_SRGB_BLOCK: |
| case VK_FORMAT_BC3_UNORM_BLOCK: |
| case VK_FORMAT_BC3_SRGB_BLOCK: |
| return true; |
| |
| default: |
| return false; |
| } |
| } |