diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-28 14:29:10 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-28 14:29:10 +0000 |
commit | 2aa4a82499d4becd2284cdb482213d541b8804dd (patch) | |
tree | b80bf8bf13c3766139fbacc530efd0dd9d54394c /gfx/thebes/gfxWindowsNativeDrawing.h | |
parent | Initial commit. (diff) | |
download | firefox-2aa4a82499d4becd2284cdb482213d541b8804dd.tar.xz firefox-2aa4a82499d4becd2284cdb482213d541b8804dd.zip |
Adding upstream version 86.0.1.upstream/86.0.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'gfx/thebes/gfxWindowsNativeDrawing.h')
-rw-r--r-- | gfx/thebes/gfxWindowsNativeDrawing.h | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/gfx/thebes/gfxWindowsNativeDrawing.h b/gfx/thebes/gfxWindowsNativeDrawing.h new file mode 100644 index 0000000000..a7713dd800 --- /dev/null +++ b/gfx/thebes/gfxWindowsNativeDrawing.h @@ -0,0 +1,107 @@ +/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*- + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifndef _GFXWINDOWSNATIVEDRAWING_H_ +#define _GFXWINDOWSNATIVEDRAWING_H_ + +#include <windows.h> + +#include "gfxContext.h" +#include "gfxWindowsSurface.h" + +class gfxWindowsNativeDrawing { + public: + /* Flags for notifying this class what kind of operations the native + * drawing supports + */ + + enum { + /* Whether the native drawing can draw to a surface of content COLOR_ALPHA + */ + CAN_DRAW_TO_COLOR_ALPHA = 1 << 0, + CANNOT_DRAW_TO_COLOR_ALPHA = 0 << 0, + + /* Whether the native drawing can be scaled using SetWorldTransform */ + CAN_AXIS_ALIGNED_SCALE = 1 << 1, + CANNOT_AXIS_ALIGNED_SCALE = 0 << 1, + + /* Whether the native drawing can be both scaled and rotated arbitrarily + using SetWorldTransform */ + CAN_COMPLEX_TRANSFORM = 1 << 2, + CANNOT_COMPLEX_TRANSFORM = 0 << 2, + }; + + /* Create native win32 drawing for a rectangle bounded by + * nativeRect. + * + * Typical usage looks like: + * + * gfxWindowsNativeDrawing nativeDraw(ctx, destGfxRect, capabilities); + * do { + * HDC dc = nativeDraw.BeginNativeDrawing(); + * if (!dc) + * return NS_ERROR_FAILURE; + * + * RECT winRect; + * nativeDraw.TransformToNativeRect(rect, winRect); + * + * ... call win32 operations on HDC to draw to winRect ... + * + * nativeDraw.EndNativeDrawing(); + * } while (nativeDraw.ShouldRenderAgain()); + * nativeDraw.PaintToContext(); + */ + gfxWindowsNativeDrawing( + gfxContext* ctx, const gfxRect& nativeRect, + uint32_t nativeDrawFlags = CANNOT_DRAW_TO_COLOR_ALPHA | + CANNOT_AXIS_ALIGNED_SCALE | + CANNOT_COMPLEX_TRANSFORM); + + /* Returns a HDC which may be used for native drawing. This HDC is valid + * until EndNativeDrawing is called; if it is used for drawing after that + * time, the result is undefined. */ + HDC BeginNativeDrawing(); + + /* Transform the native rect into something valid for rendering + * to the HDC. This may or may not change RECT, depending on + * whether SetWorldTransform is used or not. */ + void TransformToNativeRect(const gfxRect& r, RECT& rout); + + /* Marks the end of native drawing */ + void EndNativeDrawing(); + + /* Returns true if the native drawing should be executed again */ + bool ShouldRenderAgain(); + + /* Places the result to the context, if necessary */ + void PaintToContext(); + + private: + RefPtr<gfxContext> mContext; + gfxRect mNativeRect; + uint32_t mNativeDrawFlags; + + // what state the rendering is in + uint8_t mRenderState; + + mozilla::gfx::Point mDeviceOffset; + RefPtr<gfxPattern> mBlackPattern, mWhitePattern; + + enum TransformType { TRANSLATION_ONLY, AXIS_ALIGNED_SCALE, COMPLEX }; + + TransformType mTransformType; + gfxPoint mTranslation; + gfxSize mScale; + XFORM mWorldTransform; + + // saved state + RefPtr<gfxWindowsSurface> mWinSurface, mBlackSurface, mWhiteSurface; + HDC mDC; + XFORM mOldWorldTransform; + POINT mOrigViewportOrigin; + mozilla::gfx::IntSize mTempSurfaceSize; +}; + +#endif |