2353349fe5
This commit introduces "AtlasEngine", a new text renderer based on DxEngine. But unlike it, DirectWrite and Direct2D are only used to rasterize glyphs. Blending and placing these glyphs into the target view is being done using Direct3D and a simple HLSL shader. Since this new renderer more aggressively assumes that the text is monospace, it simplifies the implementation: The viewport is divided into cells, and its data is stored as a simple matrix. Modifications to this matrix involve only simple pointer arithmetic and is easy to understand. But just like with DxEngine however, DirectWrite related code remains extremely complex and hard to understand. Supported features: * Basic text rendering with grayscale AA * Foreground and background colors * Emojis, including zero width joiners * Underline, dotted underline, strikethrough * Custom font axes and features * Selections * All cursor styles * Full alpha support for all colors * _Should_ work with Windows 7 Unsupported features: * A more conservative GPU memory usage The backing texture atlas for glyphs is grow-only and will not shrink. After 256MB of memory is used up (~20k glyphs) text output will be broken until the renderer is restarted. * ClearType * Remaining gridlines (left, right, top, bottom, double underline) * Hyperlinks don't get full underlines if hovered in WT * Softfonts * Non-default line renditions Performance: * Runs at up to native display refresh rate Unfortunately the frame rate often drops below refresh rate, due us fighting over the buffer lock with other parts of the application. * CPU consumption is up to halved compared to DxEngine AtlasEngine is still highly unoptimized. Glyph hashing consumes up to a third of the current CPU time. * No regressions in WT performance VT parsing and related buffer management takes up most of the CPU time (~85%), due to which the AtlasEngine can't show any further improvements. * ~2x improvement in raw text throughput in OpenConsole compared to DxEngine running at 144 FPS * ≥10x improvement in colored VT output in WT/OpenConsole compared to DxEngine running at 144 FPS
86 lines
4.1 KiB
C++
86 lines
4.1 KiB
C++
// Copyright (c) Microsoft Corporation.
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// Licensed under the MIT license.
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#pragma once
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#include "../../renderer/inc/RenderEngineBase.hpp"
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namespace Microsoft::Console::Render
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{
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class WddmConEngine final : public RenderEngineBase
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{
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public:
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WddmConEngine();
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~WddmConEngine() override;
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[[nodiscard]] HRESULT Initialize() noexcept;
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bool IsInitialized();
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// Used to release device resources so that another instance of
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// conhost can render to the screen (i.e. only one DirectX
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// application may control the screen at a time.)
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[[nodiscard]] HRESULT Enable() noexcept override;
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[[nodiscard]] HRESULT Disable() noexcept;
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RECT GetDisplaySize();
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// IRenderEngine Members
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[[nodiscard]] HRESULT Invalidate(const SMALL_RECT* const psrRegion) noexcept override;
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[[nodiscard]] HRESULT InvalidateCursor(const SMALL_RECT* const psrRegion) noexcept override;
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[[nodiscard]] HRESULT InvalidateSystem(const RECT* const prcDirtyClient) noexcept override;
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[[nodiscard]] HRESULT InvalidateSelection(const std::vector<SMALL_RECT>& rectangles) noexcept override;
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[[nodiscard]] HRESULT InvalidateScroll(const COORD* const pcoordDelta) noexcept override;
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[[nodiscard]] HRESULT InvalidateAll() noexcept override;
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[[nodiscard]] HRESULT InvalidateCircling(_Out_ bool* const pForcePaint) noexcept override;
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[[nodiscard]] HRESULT PrepareForTeardown(_Out_ bool* const pForcePaint) noexcept override;
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[[nodiscard]] HRESULT StartPaint() noexcept override;
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[[nodiscard]] HRESULT EndPaint() noexcept override;
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[[nodiscard]] HRESULT Present() noexcept override;
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[[nodiscard]] HRESULT ScrollFrame() noexcept override;
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[[nodiscard]] HRESULT PaintBackground() noexcept override;
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[[nodiscard]] HRESULT PaintBufferLine(gsl::span<const Cluster> const clusters,
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const COORD coord,
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const bool trimLeft,
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const bool lineWrapped) noexcept override;
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[[nodiscard]] HRESULT PaintBufferGridLines(GridLineSet const lines, COLORREF const color, size_t const cchLine, COORD const coordTarget) noexcept override;
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[[nodiscard]] HRESULT PaintSelection(const SMALL_RECT rect) noexcept override;
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[[nodiscard]] HRESULT PaintCursor(const CursorOptions& options) noexcept override;
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[[nodiscard]] HRESULT UpdateDrawingBrushes(const TextAttribute& textAttributes,
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const gsl::not_null<IRenderData*> pData,
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const bool usingSoftFont,
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bool const isSettingDefaultBrushes) noexcept override;
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[[nodiscard]] HRESULT UpdateFont(const FontInfoDesired& fiFontInfoDesired, FontInfo& fiFontInfo) noexcept override;
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[[nodiscard]] HRESULT UpdateDpi(int const iDpi) noexcept override;
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[[nodiscard]] HRESULT UpdateViewport(const SMALL_RECT srNewViewport) noexcept override;
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[[nodiscard]] HRESULT GetProposedFont(const FontInfoDesired& fiFontInfoDesired, FontInfo& fiFontInfo, int const iDpi) noexcept override;
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[[nodiscard]] HRESULT GetDirtyArea(gsl::span<const til::rectangle>& area) noexcept override;
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[[nodiscard]] HRESULT GetFontSize(_Out_ COORD* const pFontSize) noexcept override;
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[[nodiscard]] HRESULT IsGlyphWideByFont(const std::wstring_view glyph, _Out_ bool* const pResult) noexcept override;
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protected:
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[[nodiscard]] HRESULT _DoUpdateTitle(_In_ const std::wstring_view newTitle) noexcept override;
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private:
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HANDLE _hWddmConCtx;
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// Helpers
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void FreeResources(ULONG displayHeight);
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// Variables
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LONG _displayHeight;
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LONG _displayWidth;
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til::rectangle _dirtyArea;
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PCD_IO_ROW_INFORMATION* _displayState;
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WORD _currentLegacyColorAttribute;
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};
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}
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