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use crate::*; use bindings::Windows::Win32::{Graphics::Imaging::*, System::SystemServices::*}; use std::path::{Path, PathBuf}; use windows::Interface; #[derive(Clone, Copy, PartialEq, Eq, Debug)] #[repr(u32)] pub enum Interpolation { NearestNeighbor = D2D1_INTERPOLATION_MODE_NEAREST_NEIGHBOR.0, Linear = D2D1_INTERPOLATION_MODE_LINEAR.0, Cubic = D2D1_INTERPOLATION_MODE_CUBIC.0, MultiSampleLinear = D2D1_INTERPOLATION_MODE_MULTI_SAMPLE_LINEAR.0, Anisotropic = D2D1_INTERPOLATION_MODE_ANISOTROPIC.0, HighQualityCubic = D2D1_INTERPOLATION_MODE_HIGH_QUALITY_CUBIC.0, } #[derive(Clone, PartialEq, Eq, Debug)] pub struct Image(ID2D1Bitmap1); impl Image { #[inline] pub(crate) fn new( dc: &ID2D1DeviceContext, factory: &IWICImagingFactory, loader: impl ImageLoader, ) -> windows::Result<Self> { loader.load(dc, factory) } #[inline] pub(crate) fn draw( &self, dc: &ID2D1DeviceContext, dest_rect: Rect, src_rect: Option<Rect>, interpolation: Interpolation, ) { let dest = Inner(dest_rect).into(); let src = src_rect.map(|src| Inner(src).into()); unsafe { dc.DrawBitmap2( &self.0, &dest, 1.0, D2D1_INTERPOLATION_MODE(interpolation as _), if let Some(src) = src.as_ref() { src as *const _ } else { std::ptr::null() }, std::ptr::null(), ); } } #[inline] pub fn size(&self) -> gecl::Size<u32> { unsafe { let size = self.0.GetPixelSize(); gecl::Size::new(size.width, size.height) } } } pub trait ImageLoader { fn load(&self, dc: &ID2D1DeviceContext, factory: &IWICImagingFactory) -> windows::Result<Image>; } impl<'a> ImageLoader for &'a Path { fn load( &self, dc: &ID2D1DeviceContext, factory: &IWICImagingFactory, ) -> windows::Result<Image> { unsafe { let decoder = { factory.CreateDecoderFromFilename( self.to_str().unwrap(), std::ptr::null(), GENERIC_READ, WICDecodeMetadataCacheOnDemand, )? }; let frame = decoder.GetFrame(0)?; let converter = { let converter = factory.CreateFormatConverter()?; let mut guid = GUID_WICPixelFormat32bppPBGRA.clone(); converter.Initialize( &frame, &mut guid, WICBitmapDitherTypeNone, None, 1.0, WICBitmapPaletteTypeMedianCut, )?; converter }; let bitmap = { dc.CreateBitmapFromWicBitmap(&converter, std::ptr::null())? .cast()? }; Ok(Image(bitmap)) } } } impl ImageLoader for PathBuf { fn load( &self, dc: &ID2D1DeviceContext, factory: &IWICImagingFactory, ) -> windows::Result<Image> { self.as_path().load(dc, factory) } } impl<'a> ImageLoader for &'a str { fn load( &self, dc: &ID2D1DeviceContext, factory: &IWICImagingFactory, ) -> windows::Result<Image> { Path::new(self).load(dc, factory) } } impl<'a> ImageLoader for &'a String { fn load( &self, dc: &ID2D1DeviceContext, factory: &IWICImagingFactory, ) -> windows::Result<Image> { Path::new(self).load(dc, factory) } }