| 868 | } |
| 869 | |
| 870 | bool TextureBase::InitData::GenerateMip(int32 mipIndex, bool linear) |
| 871 | { |
| 872 | // Validate input |
| 873 | if (mipIndex < 1 || mipIndex >= Mips.Count()) |
| 874 | { |
| 875 | LOG(Warning, "Invalid mip map to generate."); |
| 876 | return true; |
| 877 | } |
| 878 | if (ArraySize < 1) |
| 879 | { |
| 880 | LOG(Warning, "Invalid array size."); |
| 881 | return true; |
| 882 | } |
| 883 | if (PixelFormatExtensions::IsCompressed(Format)) |
| 884 | { |
| 885 | LOG(Warning, "Cannot generate mip map for compressed format data."); |
| 886 | return true; |
| 887 | } |
| 888 | const auto& srcMip = Mips[mipIndex - 1]; |
| 889 | auto& dstMip = Mips[mipIndex]; |
| 890 | if (srcMip.RowPitch == 0 || srcMip.SlicePitch == 0 || srcMip.Data.IsInvalid()) |
| 891 | { |
| 892 | LOG(Warning, "Missing data for source mip map."); |
| 893 | return true; |
| 894 | } |
| 895 | |
| 896 | PROFILE_CPU_NAMED("Texture.GenerateMip"); |
| 897 | |
| 898 | // Allocate data |
| 899 | const int32 dstMipWidth = Math::Max(1, Width >> mipIndex); |
| 900 | const int32 dstMipHeight = Math::Max(1, Height >> mipIndex); |
| 901 | const int32 pixelStride = PixelFormatExtensions::SizeInBytes(Format); |
| 902 | dstMip.RowPitch = dstMipWidth * pixelStride; |
| 903 | dstMip.SlicePitch = dstMip.RowPitch * dstMipHeight; |
| 904 | dstMip.Data.Allocate(dstMip.SlicePitch * ArraySize); |
| 905 | |
| 906 | // Perform filtering |
| 907 | if (linear) |
| 908 | { |
| 909 | switch (Format) |
| 910 | { |
| 911 | // 4 component, 32 bit with 8 bits per component - use Color32 type |
| 912 | case PixelFormat::R8G8B8A8_SInt: |
| 913 | case PixelFormat::R8G8B8A8_Typeless: |
| 914 | case PixelFormat::R8G8B8A8_SNorm: |
| 915 | case PixelFormat::R8G8B8A8_UInt: |
| 916 | case PixelFormat::R8G8B8A8_UNorm: |
| 917 | case PixelFormat::R8G8B8A8_UNorm_sRGB: |
| 918 | case PixelFormat::R8G8_B8G8_UNorm: |
| 919 | case PixelFormat::B8G8R8A8_Typeless: |
| 920 | case PixelFormat::B8G8R8A8_UNorm: |
| 921 | case PixelFormat::B8G8R8A8_UNorm_sRGB: |
| 922 | case PixelFormat::B8G8R8X8_Typeless: |
| 923 | case PixelFormat::B8G8R8X8_UNorm: |
| 924 | case PixelFormat::B8G8R8X8_UNorm_sRGB: |
| 925 | { |
| 926 | // Linear downscale filter |
| 927 | for (int32 arrayIndex = 0; arrayIndex < ArraySize; arrayIndex++) |