c803893c22
## Summary of the Pull Request When we're on acrylic, we can't have cleartype text unfortunately. This PR changes the DX renderer to force cleartype runs of text that are on a non-opaque background to use grayscale AA instead. ## References Here are some of the URLS I was referencing as writing this: * https://stackoverflow.com/q/23587787 * https://docs.microsoft.com/en-us/windows/win32/direct2d/supported-pixel-formats-and-alpha-modes#cleartype-and-alpha-modes * https://devblogs.microsoft.com/oldnewthing/20150129-00/?p=44803 * https://docs.microsoft.com/en-us/windows/win32/api/d2d1/ne-d2d1-d2d1_layer_options * https://docs.microsoft.com/en-us/windows/win32/direct2d/direct2d-layers-overview#d2d1_layer_parameters1-and-d2d1_layer_options1 * https://docs.microsoft.com/en-us/windows/win32/api/dcommon/ne-dcommon-d2d1_alpha_mode?redirectedfrom=MSDN#cleartype-and-alpha-modes * https://stackoverflow.com/a/26523006 Additionally: * This was introduced in #4711 ## PR Checklist * [x] Closes #5098 * [x] I work here * [ ] Tests added/passed * [n/a] Requires documentation to be updated ## Detailed Description of the Pull Request / Additional comments Basically, if you use cleartype on a light background, what you'll get today is the text foreground color _added_ to the background. This will make the text look basically invisible. So, what I did was use some trickery with `PushLayer` to basically create a layer where the text would be forced to render in grayscale AA. I only enable this layer pushing business when both: * The user has enabled cleartype text * The background opacity < 1.0 This plumbs some information through from the TermControl to the DX Renderer to make this smooth. ## Validation Steps Performed Opened both cleartype and grayscale panes SxS, and messed with the opacity liberally. |
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| .. | ||
| lib | ||
| ut_dx | ||
| CustomTextLayout.cpp | ||
| CustomTextLayout.h | ||
| CustomTextRenderer.cpp | ||
| CustomTextRenderer.h | ||
| dirs | ||
| DxRenderer.cpp | ||
| DxRenderer.hpp | ||
| precomp.cpp | ||
| precomp.h | ||
| ScreenPixelShader.h | ||
| ScreenVertexShader.h | ||
| sources.inc | ||