| 824 | } |
| 825 | |
| 826 | Texture* Image::texture(span<const string> channelNames, EInterpolationMode minFilter, EInterpolationMode magFilter) & { |
| 827 | if (size().x() > maxTextureSize() || size().y() > maxTextureSize()) { |
| 828 | tlog::error("{} is too large for Texturing. ({}x{})", mName, size().x(), size().y()); |
| 829 | return nullptr; |
| 830 | } |
| 831 | |
| 832 | const string lookup = fmt::format("{}-{}-{}", join(channelNames, ","), tev::toString(minFilter), tev::toString(magFilter)); |
| 833 | if (const auto it = mTextures.find(lookup); it != end(mTextures)) { |
| 834 | auto& texture = it->second; |
| 835 | if (texture.mipmapDirty && minFilter == EInterpolationMode::Trilinear) { |
| 836 | texture.nanoguiTexture->generate_mipmap(); |
| 837 | texture.mipmapDirty = false; |
| 838 | } |
| 839 | |
| 840 | return texture.nanoguiTexture.get(); |
| 841 | } |
| 842 | |
| 843 | static constexpr auto toNanogui = [](EInterpolationMode mode) { |
| 844 | switch (mode) { |
| 845 | case EInterpolationMode::Nearest: return Texture::InterpolationMode::Nearest; |
| 846 | case EInterpolationMode::Bilinear: return Texture::InterpolationMode::Bilinear; |
| 847 | case EInterpolationMode::Trilinear: return Texture::InterpolationMode::Trilinear; |
| 848 | default: throw runtime_error{"Unknown interpolation mode."}; |
| 849 | } |
| 850 | }; |
| 851 | |
| 852 | Texture::PixelFormat pixelFormat; |
| 853 | switch (channelNames.size()) { |
| 854 | case 1: pixelFormat = Texture::PixelFormat::R; break; |
| 855 | case 2: pixelFormat = Texture::PixelFormat::RA; break; |
| 856 | case 3: pixelFormat = Texture::PixelFormat::RGB; break; |
| 857 | case 4: pixelFormat = Texture::PixelFormat::RGBA; break; |
| 858 | default: throw runtime_error{"Unsupported number of channels for texture."}; |
| 859 | } |
| 860 | |
| 861 | const Texture::ComponentFormat componentFormat = ranges::any_of( |
| 862 | channelNames | views::transform([this](const auto& c) { return channel(c); }), |
| 863 | [](const auto& c) { return c && c->desiredPixelFormat() == EPixelFormat::F32; } |
| 864 | ) ? |
| 865 | Texture::ComponentFormat::Float32 : |
| 866 | Texture::ComponentFormat::Float16; |
| 867 | |
| 868 | mTextures.emplace( |
| 869 | piecewise_construct, |
| 870 | tuple{ |
| 871 | lookup |
| 872 | }, |
| 873 | tuple{ |
| 874 | new Texture{ |
| 875 | pixelFormat, |
| 876 | componentFormat, |
| 877 | {size().x(), size().y()}, |
| 878 | toNanogui(minFilter), |
| 879 | toNanogui(magFilter), |
| 880 | Texture::WrapMode::ClampToEdge, |
| 881 | 1, |
| 882 | Texture::TextureFlags::ShaderRead, |
| 883 | true, |
no test coverage detected