terminal/src/inc/til.h
Michael Niksa 79684bf821
Render row-by-row instead of invalidating entire screen (#5185)
## Summary of the Pull Request
Adjusts DirectX renderer to use `til::bitmap` to track invalidation
regions. Uses special modification to invalidate a row-at-a-time to
ensure ligatures and NxM glyphs continue to work.

## References
Likely helps #1064

## PR Checklist
* [x] Closes #778
* [x] I work here.
* [x] Manual testing performed. See Performance traces in #778.
* [x] Automated tests for `til` changes.
* [x] Am core contributor. And discussed with @DHowett-MSFT.

## Detailed Description of the Pull Request / Additional comments
- Applies `til::bitmap` as the new invalidation scheme inside the
  DirectX renderer and updates all entrypoints for collecting
  invalidation data to coalesce into this structure.
- Semi-permanently routes all invalidations through a helper method
  `_InvalidateRectangle` that will expand any invalidation to cover the
  entire line. This ensures that ligatures and NxM glyphs will continue
  to render appropriately while still allowing us to dramatically reduce
  the number of lines drawn overall. In the future, we may come up with
  a tighter solution than line-by-line invalidation and can modify this
  helper method appropriately at that later date to further scope the
  invalid region.
- Ensures that the `experimental.retroTerminalEffects` feature continues
  to invalidate the entire display on start of frame as the shader is
  applied at the end of the frame composition and will stack on itself
  in an amusing fashion when we only redraw part of the display.
- Moves many member variables inside the DirectX renderer into the new
  `til::size`, `til::point`, and `til::rectangle` methods to facilitate
  easier management and mathematical operations. Consequently adds
  `try/catch` blocks around many of the already-existing `noexcept`
  methods to deal with mathematical or casting failures now detected by
  using the support classes.
- Corrects `TerminalCore` redraw triggers to appropriately communicate
  scrolling circumstances to the renderer so it can optimize the draw
  regions appropriately.
- Fixes an issue in the base `Renderer` that was causing overlapping
  scroll regions due to behavior of `Viewport::TrimToViewport` modifying
  the local. This fix is "good enough" for now and should go away when
  `Viewport` is fully migrated to `til::rectangle`.
- Adds multiplication and division operators to `til::rectangle` and
  supporting tests. These operates will help scale back and forth
  between a cell-based rectangle and a pixel-based rectangle. They take
  special care to ensure that a pixel rectangle being divided downward
  back to cells will expand (with the ceiling division methods) to cover
  a full cell when even one pixel inside the cell is touched (as is how
  a redraw would have to occur).
- Blocks off trace logging of invalid regions if no one is listening to
  optimize performance.
- Restores full usage of `IDXGISwapChain1::Present1` to accurately and
  fully communicate dirty and scroll regions to the underlying DirectX
  framework. This additional information allows the framework to
  optimize drawing between frames by eliminating data transfer of
  regions that aren't modified and shuffling frames in place. See
  [Remarks](https://docs.microsoft.com/en-us/windows/win32/api/dxgi1_2/nf-dxgi1_2-idxgiswapchain1-present1#remarks)
  for more details.
- Updates `til::bitmap` set methods to use more optimized versions of
  the setters on the `dynamic_bitset<>` that can bulk fill bits as the
  existing algorithm was noticeably slow after applying the
  "expand-to-row" helper to the DirectX renderer invalidation.
- All `til` import hierarchy is now handled in the parent `til.h` file
  and not in the child files to prevent circular imports from happening.
  We don't expect the import of any individual library file, only the
  base one. So this should be OK for now.

## Validation Steps Performed
- Ran `cmatrix`, `cmatrix -u0`, and `cacafire` after changes were made.
- Made a bunch of ligatures with `Cascadia Code` in the Terminal
  before/after the changes and confirmed they still ligate.
- Ran `dir` in Powershell and fixed the scrolling issues
- Clicked all over the place and dragged to make sure selection works.
- Checked retro terminal effect manually with Powershell.
2020-04-13 20:09:02 +00:00

66 lines
2.8 KiB
C++

// Copyright (c) Microsoft Corporation.
// Licensed under the MIT license.
#pragma once
#define _TIL_INLINEPREFIX __declspec(noinline) inline
#include "til/at.h"
#include "til/color.h"
#include "til/math.h"
#include "til/some.h"
#include "til/size.h"
#include "til/point.h"
#include "til/operators.h"
#include "til/rectangle.h"
#include "til/bitmap.h"
#include "til/u8u16convert.h"
namespace til // Terminal Implementation Library. Also: "Today I Learned"
{
}
// These sit outside the namespace because they sit outside for WIL too.
// Inspired from RETURN_IF_WIN32_BOOL_FALSE
// WIL doesn't include a RETURN_BOOL_IF_FALSE, and RETURN_IF_WIN32_BOOL_FALSE
// will actually return the value of GLE.
#define RETURN_BOOL_IF_FALSE(b) \
do \
{ \
const bool __boolRet = wil::verify_bool(b); \
if (!__boolRet) \
{ \
return __boolRet; \
} \
} while (0, 0)
// Due to a bug (DevDiv 441931), Warning 4297 (function marked noexcept throws exception) is detected even when the throwing code is unreachable, such as the end of scope after a return, in function-level catch.
#define CATCH_LOG_RETURN_FALSE() \
catch (...) \
{ \
__pragma(warning(suppress : 4297)); \
LOG_CAUGHT_EXCEPTION(); \
return false; \
}
// MultiByteToWideChar has a bug in it where it can return 0 and then not set last error.
// WIL has a fit if the last error is 0 when a bool false is returned.
// This macro doesn't have a fit. It just reports E_UNEXPECTED instead.
#define THROW_LAST_ERROR_IF_AND_IGNORE_BAD_GLE(condition) \
do \
{ \
if (condition) \
{ \
const auto gle = ::GetLastError(); \
if (gle) \
{ \
THROW_WIN32(gle); \
} \
else \
{ \
THROW_HR(E_UNEXPECTED); \
} \
} \
} while (0, 0)