rainmeter-studio/Common/Gfx/CanvasD2D.h

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/*
Copyright (C) 2013 Birunthan Mohanathas
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef RM_GFX_CANVASD2D_H_
#define RM_GFX_CANVASD2D_H_
#include "Canvas.h"
#include "FontCollectionD2D.h"
#include "TextFormatD2D.h"
#include "Util/WICBitmapDIB.h"
#include <memory>
#include <string>
#include <ole2.h> // For Gdiplus.h.
#include <GdiPlus.h>
#include <d2d1_1.h>
#include <d2d1helper.h>
#include <dwrite_1.h>
#include <wincodec.h>
#include <wrl/client.h>
namespace Gfx {
// Provides a Direct2D/DirectWrite implementation of Canvas.
class CanvasD2D : public Canvas
{
public:
static bool Initialize();
static void Finalize();
virtual void Resize(int w, int h);
virtual bool BeginDraw();
virtual void EndDraw();
virtual Gdiplus::Graphics& BeginGdiplusContext() override;
virtual void EndGdiplusContext() override;
virtual HDC GetDC() override;
virtual void ReleaseDC(HDC dc) override;
virtual FontCollection* CreateFontCollection() override { return new FontCollectionD2D(); }
virtual TextFormat* CreateTextFormat() override { return new TextFormatD2D(); }
virtual bool IsTransparentPixel(int x, int y) override;
virtual void SetTransform(const Gdiplus::Matrix& matrix) override;
virtual void ResetTransform() override;
virtual void RotateTransform(float angle, float x, float y, float dx, float dy) override;
virtual void SetAntiAliasing(bool enable) override;
virtual void SetTextAntiAliasing(bool enable) override;
virtual void Clear(const Gdiplus::Color& color) override;
virtual void DrawTextW(const WCHAR* str, UINT strLen, const TextFormat& format, Gdiplus::RectF& rect, const Gdiplus::SolidBrush& brush) override;
virtual bool MeasureTextW(const WCHAR* str, UINT strLen, const TextFormat& format, Gdiplus::RectF& rect) override;
virtual bool MeasureTextLinesW(const WCHAR* str, UINT strLen, const TextFormat& format, Gdiplus::RectF& rect, UINT& lines) override;
virtual void DrawBitmap(Gdiplus::Bitmap* bitmap, const Gdiplus::Rect& dstRect, const Gdiplus::Rect& srcRect) override;
virtual void FillRectangle(Gdiplus::Rect& rect, const Gdiplus::SolidBrush& brush) override;
private:
friend class Canvas;
friend class FontCollectionD2D;
friend class TextFormatD2D;
CanvasD2D();
~CanvasD2D();
CanvasD2D(const CanvasD2D& other) = delete;
CanvasD2D& operator=(CanvasD2D other) = delete;
bool BeginTargetDraw();
void EndTargetDraw();
// Sets the |m_Target| transformation to be equal to that of |m_GdipGraphics|.
void UpdateTargetTransform();
Microsoft::WRL::ComPtr<ID2D1RenderTarget> m_Target;
// Underlying pixel data shared by both m_Target and m_GdipBitmap.
Util::WICBitmapDIB m_Bitmap;
// GDI+ objects that share the pixel data of m_Bitmap.
std::unique_ptr<Gdiplus::Graphics> m_GdipGraphics;
std::unique_ptr<Gdiplus::Bitmap> m_GdipBitmap;
bool m_TextAntiAliasing;
// |true| if PushAxisAlignedClip()/PopAxisAlignedClip() can be used.
bool m_CanUseAxisAlignClip;
static UINT c_Instances;
static Microsoft::WRL::ComPtr<ID2D1Factory1> c_D2DFactory;
static Microsoft::WRL::ComPtr<IDWriteFactory1> c_DWFactory;
static Microsoft::WRL::ComPtr<IDWriteGdiInterop> c_DWGDIInterop;
static Microsoft::WRL::ComPtr<IWICImagingFactory> c_WICFactory;
};
} // namespace Gfx
#endif