nim_duilib/tool_kits/duilib/Render/Render.cpp

#include "StdAfx.h"

namespace ui {

static inline void DrawFunction(HDC hDC, bool bTransparent, UiRect rcDest, HDC hdcSrc, UiRect rcSrc, bool bAlphaChannel, int uFade)
{
	if (bTransparent || bAlphaChannel || uFade < 255
		|| (rcSrc.GetWidth() == rcDest.GetWidth() && rcSrc.GetHeight() == rcDest.GetHeight())) {
		BLENDFUNCTION ftn = { AC_SRC_OVER, 0, uFade, AC_SRC_ALPHA };
		::AlphaBlend(hDC, rcDest.left, rcDest.top, rcDest.GetWidth(), rcDest.GetHeight(),
			hdcSrc, rcSrc.left, rcSrc.top, rcSrc.GetWidth(), rcSrc.GetHeight(), ftn);
	}
	else {
		::StretchBlt(hDC, rcDest.left, rcDest.top, rcDest.GetWidth(), rcDest.GetHeight(),
			hdcSrc, rcSrc.left, rcSrc.top, rcSrc.GetWidth(), rcSrc.GetHeight(), SRCCOPY);
	}
}

RenderContext_GdiPlus::RenderContext_GdiPlus()
	: m_hDC(NULL)
	, m_hOldBitmap(NULL)
	, m_bTransparent(false)
{
	HDC hDC = ::GetDC(NULL);
	m_hDC = ::CreateCompatibleDC(hDC);
	::ReleaseDC(NULL, hDC);
	ASSERT(m_hDC);
}

RenderContext_GdiPlus::~RenderContext_GdiPlus()
{
	if (m_hOldBitmap != NULL)
	{
		::SelectObject(m_hDC, m_hOldBitmap);
		m_hOldBitmap = NULL;
	}

	if (m_hDC != NULL)
	{
		::DeleteDC(m_hDC);
		m_hDC = NULL;
	}
}

HDC RenderContext_GdiPlus::GetDC()
{
	return m_hDC;
}

bool RenderContext_GdiPlus::Resize(int width, int height, bool flipBItmap)
{
	ASSERT(m_hDC);
	if (m_bitmap.GetWidth() == width && m_bitmap.GetHeight() == height)
		return false;

	if (m_hOldBitmap != NULL)
	{
		::SelectObject(m_hDC, m_hOldBitmap);
	}

	bool ret = m_bitmap.Init(m_hDC, width, height, flipBItmap);
	m_hOldBitmap = (HBITMAP)::SelectObject(m_hDC, m_bitmap.GetBitmap());
	return ret;
}

void RenderContext_GdiPlus::Clear()
{
	ASSERT(m_hDC);
	m_bitmap.Clear();
}

std::unique_ptr<ui::IRenderContext> RenderContext_GdiPlus::Clone()
{
	std::unique_ptr<ui::IRenderContext> pClone = std::make_unique<ui::RenderContext_GdiPlus>();
	pClone->Resize(GetWidth(), GetHeight());
	pClone->BitBlt(0, 0, GetWidth(), GetHeight(), m_hDC);
	return pClone;
}

HBITMAP RenderContext_GdiPlus::DetachBitmap()
{
	ASSERT(m_hDC && m_hOldBitmap);
	ASSERT(m_bitmap.GetHeight() != 0 && m_bitmap.GetWidth() != 0);
	if (m_hOldBitmap == NULL)
		return NULL;

	::SelectObject(m_hDC, m_hOldBitmap);
	return m_bitmap.DetachBitmap();
}

BYTE* RenderContext_GdiPlus::GetBits()
{
	return m_bitmap.GetBits();
}

int RenderContext_GdiPlus::GetWidth()
{
	return m_bitmap.GetWidth();
}

int RenderContext_GdiPlus::GetHeight()
{
	return m_bitmap.GetHeight();
}

void RenderContext_GdiPlus::ClearAlpha(const UiRect& rcDirty, int alpha)
{
	m_bitmap.ClearAlpha(rcDirty, alpha);
}

void RenderContext_GdiPlus::RestoreAlpha(const UiRect& rcDirty, const UiRect& rcShadowPadding, int alpha)
{
	m_bitmap.RestoreAlpha(rcDirty, rcShadowPadding, alpha);
}

bool RenderContext_GdiPlus::IsRenderTransparent() const
{
	return m_bTransparent;
}

bool RenderContext_GdiPlus::SetRenderTransparent(bool bTransparent)
{
	bool oldValue = m_bTransparent;
	m_bTransparent = bTransparent;
	return oldValue;
}

void RenderContext_GdiPlus::Save()
{
	m_saveDC = SaveDC(m_hDC);
}

void RenderContext_GdiPlus::Restore()
{
	RestoreDC(m_hDC, m_saveDC);
}

CPoint RenderContext_GdiPlus::OffsetWindowOrg(CPoint ptOffset)
{
	CPoint ptOldWindowOrg;
	GetWindowOrgEx(m_hDC, &ptOldWindowOrg);
	ptOffset.Offset(ptOldWindowOrg.x, ptOldWindowOrg.y);
	::SetWindowOrgEx(m_hDC, ptOffset.x, ptOffset.y, NULL);
	return ptOldWindowOrg;
}

CPoint RenderContext_GdiPlus::SetWindowOrg(CPoint ptOffset)
{
	CPoint ptOldWindowOrg;
	GetWindowOrgEx(m_hDC, &ptOldWindowOrg);
	::SetWindowOrgEx(m_hDC, ptOffset.x, ptOffset.y, NULL);
	return ptOldWindowOrg;
}

CPoint RenderContext_GdiPlus::GetWindowOrg() const
{
	CPoint ptWindowOrg;
	GetWindowOrgEx(m_hDC, &ptWindowOrg);
	return ptWindowOrg;
}

void RenderContext_GdiPlus::SetClip(const UiRect& rc)
{
	m_clip.CreateClip(m_hDC, rc);
}

void RenderContext_GdiPlus::SetRoundClip(const UiRect& rc, int width, int height)
{
	m_clip.CreateRoundClip(m_hDC, rc, width, height);
}

void RenderContext_GdiPlus::ClearClip()
{
	m_clip.ClearClip(m_hDC);
}

HRESULT RenderContext_GdiPlus::BitBlt(int x, int y, int cx, int cy, HDC hdcSrc, int xSrc /*= 0*/, int yScr /*= 0*/, DWORD rop /*= SRCCOPY*/)
{
	return ::BitBlt(m_hDC, x, y, cx, cy, hdcSrc, xSrc, yScr, rop);
}

bool RenderContext_GdiPlus::AlphaBlend(int xDest, int yDest, int widthDest, int heightDest, HDC hdcSrc, int xSrc, int yScr, int widthSrc, int heightSrc, BYTE uFade /*= 255*/)
{
	BLENDFUNCTION bf = { AC_SRC_OVER, 0, uFade, AC_SRC_ALPHA };
	return (TRUE == ::AlphaBlend(m_hDC, xDest, yDest, widthDest, heightDest, hdcSrc, xSrc, yScr, widthSrc, heightSrc, bf));
}

void RenderContext_GdiPlus::DrawImage(const UiRect& rcPaint, HBITMAP hBitmap, bool bAlphaChannel,
	const UiRect& rcImageDest, const UiRect& rcImageSource, const UiRect& rcCorners, BYTE uFade /*= 255*/, bool xtiled /*= false*/, bool ytiled /*= false*/)
{
	UiRect rcTestTemp;
	if (!::IntersectRect(&rcTestTemp, &rcImageDest, &rcPaint)) return;

	ASSERT(::GetObjectType(m_hDC) == OBJ_DC || ::GetObjectType(m_hDC) == OBJ_MEMDC);

	if (hBitmap == NULL) return;

	HDC hCloneDC = ::CreateCompatibleDC(m_hDC);
	HBITMAP hOldBitmap = (HBITMAP) ::SelectObject(hCloneDC, hBitmap);
	int stretchBltMode = ::SetStretchBltMode(m_hDC, HALFTONE);

	UiRect rcTemp;
	UiRect rcSource;
	UiRect rcDest;
	UiRect rcDpiCorner = rcCorners;
	DpiManager::GetInstance()->ScaleRect(rcDpiCorner);

	// middle
	rcDest.left = rcImageDest.left + rcDpiCorner.left;
	rcDest.top = rcImageDest.top + rcDpiCorner.top;
	rcDest.right = rcImageDest.right - rcDpiCorner.right;
	rcDest.bottom = rcImageDest.bottom - rcDpiCorner.bottom;
	rcSource.left = rcImageSource.left + rcCorners.left;
	rcSource.top = rcImageSource.top + rcCorners.top;
	rcSource.right = rcImageSource.right - rcCorners.right;
	rcSource.bottom = rcImageSource.bottom - rcCorners.bottom;
	if (::IntersectRect(&rcTemp, &rcPaint, &rcDest)) {
		if (!xtiled && !ytiled) {
			DrawFunction(m_hDC, m_bTransparent, rcDest, hCloneDC, rcSource, bAlphaChannel, uFade);
		}
		else if (xtiled && ytiled) {
			LONG lWidth = rcImageSource.right - rcImageSource.left - rcCorners.left - rcCorners.right;
			LONG lHeight = rcImageSource.bottom - rcImageSource.top - rcCorners.top - rcCorners.bottom;
			int iTimesX = (rcDest.right - rcDest.left + lWidth - 1) / lWidth;
			int iTimesY = (rcDest.bottom - rcDest.top + lHeight - 1) / lHeight;
			for (int j = 0; j < iTimesY; ++j) {
				LONG lDestTop = rcDest.top + lHeight * j;
				LONG lDestBottom = rcDest.top + lHeight * (j + 1);
				LONG lDrawHeight = lHeight;
				if (lDestBottom > rcDest.bottom) {
					lDrawHeight -= lDestBottom - rcDest.bottom;
					lDestBottom = rcDest.bottom;
				}
				for (int i = 0; i < iTimesX; ++i) {
					LONG lDestLeft = rcDest.left + lWidth * i;
					LONG lDestRight = rcDest.left + lWidth * (i + 1);
					LONG lDrawWidth = lWidth;
					if (lDestRight > rcDest.right) {
						lDrawWidth -= lDestRight - rcDest.right;
						lDestRight = rcDest.right;
					}
					rcDest.left = rcDest.left + lWidth * i;
					rcDest.top = rcDest.top + lHeight * j;
					rcDest.right = rcDest.left + lDestRight - lDestLeft;
					rcDest.bottom = rcDest.top + lDestBottom - lDestTop;
					rcSource.left = rcImageSource.left + rcCorners.left;
					rcSource.top = rcImageSource.top + rcCorners.top;
					rcSource.right = rcSource.left + lDrawWidth;
					rcSource.bottom = rcSource.top + lDrawHeight;
					DrawFunction(m_hDC, m_bTransparent, rcDest, hCloneDC, rcSource, bAlphaChannel, uFade);
				}
			}
		}
		else if (xtiled) {
			LONG lWidth = rcImageSource.right - rcImageSource.left - rcCorners.left - rcCorners.right;
			int iTimes = (rcDest.right - rcDest.left + lWidth - 1) / lWidth;
			for (int i = 0; i < iTimes; ++i) {
				LONG lDestLeft = rcDest.left + lWidth * i;
				LONG lDestRight = rcDest.left + lWidth * (i + 1);
				LONG lDrawWidth = lWidth;
				if (lDestRight > rcDest.right) {
					lDrawWidth -= lDestRight - rcDest.right;
					lDestRight = rcDest.right;
				}
				rcDest.left = lDestLeft;
				rcDest.top = rcDest.top;
				rcDest.right = lDestRight;
				rcDest.bottom = rcDest.top + rcDest.bottom;
				rcSource.left = rcImageSource.left + rcCorners.left;
				rcSource.top = rcImageSource.top + rcCorners.top;
				rcSource.right = rcSource.left + lDrawWidth;
				rcSource.bottom = rcImageSource.bottom - rcCorners.bottom;
				DrawFunction(m_hDC, m_bTransparent, rcDest, hCloneDC, rcSource, bAlphaChannel, uFade);
			}
		}
		else { // ytiled
			LONG lHeight = rcImageSource.bottom - rcImageSource.top - rcCorners.top - rcCorners.bottom;
			int iTimes = (rcDest.bottom - rcDest.top + lHeight - 1) / lHeight;
			for (int i = 0; i < iTimes; ++i) {
				LONG lDestTop = rcDest.top + lHeight * i;
				LONG lDestBottom = rcDest.top + lHeight * (i + 1);
				LONG lDrawHeight = lHeight;
				if (lDestBottom > rcDest.bottom) {
					lDrawHeight -= lDestBottom - rcDest.bottom;
					lDestBottom = rcDest.bottom;
				}
				rcDest.left = rcDest.left;
				rcDest.top = rcDest.top + lHeight * i;
				rcDest.right = rcDest.left + rcDest.right;
				rcDest.bottom = rcDest.top + lDestBottom - lDestTop;
				rcSource.left = rcImageSource.left + rcCorners.left;
				rcSource.top = rcImageSource.top + rcCorners.top;
				rcSource.right = rcImageSource.right - rcCorners.right;
				rcSource.bottom = rcSource.top + lDrawHeight;
				DrawFunction(m_hDC, m_bTransparent, rcDest, hCloneDC, rcSource, bAlphaChannel, uFade);
			}
		}
	}

	// left-top
	if (rcCorners.left > 0 && rcCorners.top > 0) {
		rcDest.left = rcImageDest.left;
		rcDest.top = rcImageDest.top;
		rcDest.right = rcImageDest.left + rcDpiCorner.left;
		rcDest.bottom = rcImageDest.top + rcDpiCorner.top;
		rcSource.left = rcImageSource.left;
		rcSource.top = rcImageSource.top;
		rcSource.right = rcImageSource.left + rcCorners.left;
		rcSource.bottom = rcImageSource.top + rcCorners.top;
		if (::IntersectRect(&rcTemp, &rcPaint, &rcDest)) {
			DrawFunction(m_hDC, m_bTransparent, rcDest, hCloneDC, rcSource, bAlphaChannel, uFade);
		}
	}
	// top
	if (rcCorners.top > 0) {
		rcDest.left = rcImageDest.left + rcDpiCorner.left;
		rcDest.top = rcImageDest.top;
		rcDest.right = rcImageDest.right - rcDpiCorner.right;
		rcDest.bottom = rcImageDest.top + rcDpiCorner.top;
		rcSource.left = rcImageSource.left + rcCorners.left;
		rcSource.top = rcImageSource.top;
		rcSource.right = rcImageSource.right - rcCorners.right;
		rcSource.bottom = rcImageSource.top + rcCorners.top;
		if (::IntersectRect(&rcTemp, &rcPaint, &rcDest)) {
			DrawFunction(m_hDC, m_bTransparent, rcDest, hCloneDC, rcSource, bAlphaChannel, uFade);
		}
	}
	// right-top
	if (rcCorners.right > 0 && rcCorners.top > 0) {
		rcDest.left = rcImageDest.right - rcDpiCorner.right;
		rcDest.top = rcImageDest.top;
		rcDest.right = rcImageDest.right;
		rcDest.bottom = rcImageDest.top + rcDpiCorner.top;
		rcSource.left = rcImageSource.right - rcCorners.right;
		rcSource.top = rcImageSource.top;
		rcSource.right = rcImageSource.right;
		rcSource.bottom = rcImageSource.top + rcCorners.top;
		if (::IntersectRect(&rcTemp, &rcPaint, &rcDest)) {
			DrawFunction(m_hDC, m_bTransparent, rcDest, hCloneDC, rcSource, bAlphaChannel, uFade);
		}
	}
	// left
	if (rcCorners.left > 0) {
		rcDest.left = rcImageDest.left;
		rcDest.top = rcImageDest.top + rcDpiCorner.top;
		rcDest.right = rcImageDest.left + rcDpiCorner.left;
		rcDest.bottom = rcImageDest.bottom - rcDpiCorner.bottom;
		rcSource.left = rcImageSource.left;
		rcSource.top = rcImageSource.top + rcCorners.top;
		rcSource.right = rcImageSource.left + rcCorners.left;
		rcSource.bottom = rcImageSource.bottom - rcCorners.bottom;
		if (::IntersectRect(&rcTemp, &rcPaint, &rcDest)) {
			DrawFunction(m_hDC, m_bTransparent, rcDest, hCloneDC, rcSource, bAlphaChannel, uFade);
		}
	}
	// right
	if (rcCorners.right > 0) {
		rcDest.left = rcImageDest.right - rcDpiCorner.right;
		rcDest.top = rcImageDest.top + rcDpiCorner.top;
		rcDest.right = rcImageDest.right;
		rcDest.bottom = rcImageDest.bottom - rcDpiCorner.bottom;
		rcSource.left = rcImageSource.right - rcCorners.right;
		rcSource.top = rcImageSource.top + rcCorners.top;
		rcSource.right = rcImageSource.right;
		rcSource.bottom = rcImageSource.bottom - rcCorners.bottom;
		if (::IntersectRect(&rcTemp, &rcPaint, &rcDest)) {
			DrawFunction(m_hDC, m_bTransparent, rcDest, hCloneDC, rcSource, bAlphaChannel, uFade);
		}
	}
	// left-bottom
	if (rcCorners.left > 0 && rcCorners.bottom > 0) {
		rcDest.left = rcImageDest.left;
		rcDest.top = rcImageDest.bottom - rcDpiCorner.bottom;
		rcDest.right = rcImageDest.left + rcDpiCorner.left;
		rcDest.bottom = rcImageDest.bottom;
		rcSource.left = rcImageSource.left;
		rcSource.top = rcImageSource.bottom - rcCorners.bottom;
		rcSource.right = rcImageSource.left + rcCorners.left;
		rcSource.bottom = rcImageSource.bottom;
		if (::IntersectRect(&rcTemp, &rcPaint, &rcDest)) {
			DrawFunction(m_hDC, m_bTransparent, rcDest, hCloneDC, rcSource, bAlphaChannel, uFade);
		}
	}
	// bottom
	if (rcCorners.bottom > 0) {
		rcDest.left = rcImageDest.left + rcDpiCorner.left;
		rcDest.top = rcImageDest.bottom - rcDpiCorner.bottom;
		rcDest.right = rcImageDest.right - rcDpiCorner.right;
		rcDest.bottom = rcImageDest.bottom;
		rcSource.left = rcImageSource.left + rcCorners.left;
		rcSource.top = rcImageSource.bottom - rcCorners.bottom;
		rcSource.right = rcImageSource.right - rcCorners.right;
		rcSource.bottom = rcImageSource.bottom;
		if (::IntersectRect(&rcTemp, &rcPaint, &rcDest)) {
			DrawFunction(m_hDC, m_bTransparent, rcDest, hCloneDC, rcSource, bAlphaChannel, uFade);
		}
	}
	// right-bottom
	if (rcCorners.right > 0 && rcCorners.bottom > 0) {
		rcDest.left = rcImageDest.right - rcDpiCorner.right;
		rcDest.top = rcImageDest.bottom - rcDpiCorner.bottom;
		rcDest.right = rcImageDest.right;
		rcDest.bottom = rcImageDest.bottom;
		rcSource.left = rcImageSource.right - rcCorners.right;
		rcSource.top = rcImageSource.bottom - rcCorners.bottom;
		rcSource.right = rcImageSource.right;
		rcSource.bottom = rcImageSource.bottom;
		if (::IntersectRect(&rcTemp, &rcPaint, &rcDest)) {
			DrawFunction(m_hDC, m_bTransparent, rcDest, hCloneDC, rcSource, bAlphaChannel, uFade);
		}
	}

	::SetStretchBltMode(m_hDC, stretchBltMode);
	::SelectObject(hCloneDC, hOldBitmap);
	::DeleteDC(hCloneDC);
}

void RenderContext_GdiPlus::DrawColor(const UiRect& rc, DWORD dwColor, BYTE uFade)
{
	DWORD dwNewColor = dwColor;
	if (uFade < 255) {
		int alpha = dwColor >> 24;
		dwNewColor = dwColor % 0xffffff;
		alpha *= double(uFade) / 255;
		dwNewColor += alpha << 24;
	}

	Gdiplus::Graphics graphics(m_hDC);
	Gdiplus::Color color(dwNewColor);
	Gdiplus::SolidBrush brush(color);
	Gdiplus::RectF rcFill(rc.left, rc.top, rc.GetWidth(), rc.GetHeight());
	graphics.FillRectangle(&brush, rcFill);
}

void RenderContext_GdiPlus::DrawColor(const UiRect& rc, const std::wstring& colorStr, BYTE uFade)
{
	if (colorStr.empty()) {
		return;
	}

	DWORD dwColor = GlobalManager::GetTextColor(colorStr);
	DrawColor(rc, dwColor, uFade);
}

void RenderContext_GdiPlus::DrawLine(const UiRect& rc, int nSize, DWORD dwPenColor)
{
	Gdiplus::Graphics graphics(m_hDC);
	Gdiplus::Pen pen(Gdiplus::Color(dwPenColor), (Gdiplus::REAL)nSize);
	graphics.DrawLine(&pen, Gdiplus::Point(rc.left, rc.top), Gdiplus::Point(rc.right, rc.bottom));
}

void RenderContext_GdiPlus::DrawLine(const IPen* pen, int x1, int y1, int x2, int y2)
{
	Gdiplus::Graphics graphics(m_hDC);
	graphics.SetSmoothingMode(Gdiplus::SmoothingModeAntiAlias);
	graphics.DrawLine(((Pen_GdiPlus*)pen)->GetPen(), x1, y1, x2, y2);
}

void RenderContext_GdiPlus::DrawBezier(const IPen* pen, int x1, int y1, int x2, int y2, int x3, int y3, int x4, int y4)
{
	Gdiplus::Graphics graphics(m_hDC);
	graphics.SetSmoothingMode(Gdiplus::SmoothingModeAntiAlias);
	graphics.DrawBezier(((Pen_GdiPlus*)pen)->GetPen(), x1, y1, x2, y2, x3, y3, x4, y4);
}

void RenderContext_GdiPlus::DrawRect(const UiRect& rc, int nSize, DWORD dwPenColor)
{
	Gdiplus::Graphics graphics(m_hDC);
	Gdiplus::Pen pen(Gdiplus::Color(dwPenColor), (Gdiplus::REAL)nSize);
	graphics.DrawRectangle(&pen, rc.left, rc.top, rc.GetWidth(), rc.GetHeight());
}


void RenderContext_GdiPlus::DrawRoundRect(const UiRect& rc, const CSize& roundSize, int nSize, DWORD dwPenColor)
{
	Gdiplus::Graphics graphics(m_hDC);
	graphics.SetSmoothingMode(Gdiplus::SmoothingModeAntiAlias);
	Gdiplus::Pen pen(Gdiplus::Color(dwPenColor), (Gdiplus::REAL)nSize);

	// <20>ü<EFBFBD><C3BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>±߿<C2B1><DFBF><EFBFBD>ʱ<EFBFBD><CAB1>ȫ<EFBFBD><C8AB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	// UiRect rcInflate = rc;
	// rcInflate.Inflate({ -1, -1, -1, -1 });

	Gdiplus::GraphicsPath pPath;
	pPath.AddArc(rc.left, rc.top, roundSize.cx, roundSize.cy, 180, 90);
	pPath.AddLine(rc.left + roundSize.cx, rc.top, rc.right - roundSize.cx, rc.top);
	pPath.AddArc(rc.right - roundSize.cx, rc.top, roundSize.cx, roundSize.cy, 270, 90);
	pPath.AddLine(rc.right, rc.top + roundSize.cy, rc.right, rc.bottom - roundSize.cy);
	pPath.AddArc(rc.right - roundSize.cx, rc.bottom - roundSize.cy, roundSize.cx, roundSize.cy, 0, 90);
	pPath.AddLine(rc.right - roundSize.cx, rc.bottom, rc.left + roundSize.cx, rc.bottom);
	pPath.AddArc(rc.left, rc.bottom - roundSize.cy, roundSize.cx, roundSize.cy, 90, 90);
	pPath.AddLine(rc.left, rc.bottom - roundSize.cy, rc.left, rc.top + roundSize.cy);
	pPath.CloseFigure();

	graphics.DrawPath(&pen, &pPath);
}

void RenderContext_GdiPlus::DrawText(const UiRect& rc, const std::wstring& strText, DWORD dwTextColor, const std::wstring& strFontId, UINT uStyle, BYTE uFade /*= 255*/, bool bLineLimit /*= false*/)
{
	ASSERT(::GetObjectType(m_hDC) == OBJ_DC || ::GetObjectType(m_hDC) == OBJ_MEMDC);
	if (strText.empty()) return;

	Gdiplus::Graphics graphics(m_hDC);
	Gdiplus::Font font(m_hDC, GlobalManager::GetFont(strFontId));
	Gdiplus::RectF rcPaint((Gdiplus::REAL)rc.left, (Gdiplus::REAL)rc.top, (Gdiplus::REAL)(rc.right - rc.left), (Gdiplus::REAL)(rc.bottom - rc.top));
	int alpha = dwTextColor >> 24;
	uFade *= double(alpha) / 255;
	if (uFade == 255) {
		uFade = 254;
	}
	Gdiplus::SolidBrush tBrush(Gdiplus::Color(uFade, GetBValue(dwTextColor), GetGValue(dwTextColor), GetRValue(dwTextColor)));

	Gdiplus::StringFormat stringFormat = Gdiplus::StringFormat::GenericTypographic();
	if ((uStyle & DT_END_ELLIPSIS) != 0) {
		stringFormat.SetTrimming(Gdiplus::StringTrimmingEllipsisCharacter);
	}

	int formatFlags = 0;
	if ((uStyle & DT_NOCLIP) != 0) {
		formatFlags |= Gdiplus::StringFormatFlagsNoClip;
	}
	if ((uStyle & DT_SINGLELINE) != 0) {
		formatFlags |= Gdiplus::StringFormatFlagsNoWrap;
	}
	if (bLineLimit) {
		formatFlags |= Gdiplus::StringFormatFlagsLineLimit;
	}
	stringFormat.SetFormatFlags(formatFlags);

	if ((uStyle & DT_LEFT) != 0) {
		stringFormat.SetAlignment(Gdiplus::StringAlignmentNear);
	}
	else if ((uStyle & DT_CENTER) != 0) {
		stringFormat.SetAlignment(Gdiplus::StringAlignmentCenter);
	}
	else if ((uStyle & DT_RIGHT) != 0) {
		stringFormat.SetAlignment(Gdiplus::StringAlignmentFar);
	}
	else {
		stringFormat.SetAlignment(Gdiplus::StringAlignmentNear);
	}

	if ((uStyle & DT_TOP) != 0) {
		stringFormat.SetLineAlignment(Gdiplus::StringAlignmentNear);
	}
	else if ((uStyle & DT_VCENTER) != 0) {
		TFontInfo* fontInfo = GlobalManager::GetTFontInfo(strFontId);
		if (fontInfo->sFontName == L"<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>") {
			if (rcPaint.Height >= fontInfo->iSize + 2) {
				rcPaint.Offset(0, 1);
			}
		}
		stringFormat.SetLineAlignment(Gdiplus::StringAlignmentCenter);
	}
	else if ((uStyle & DT_BOTTOM) != 0) {
		stringFormat.SetLineAlignment(Gdiplus::StringAlignmentFar);
	}
	else {
		stringFormat.SetLineAlignment(Gdiplus::StringAlignmentNear);
	}

	graphics.DrawString(strText.c_str(), (int)strText.length(), &font, rcPaint, &stringFormat, &tBrush);
}

void RenderContext_GdiPlus::DrawEllipse(const UiRect& rc, int nSize, DWORD dwColor)
{
	Gdiplus::Graphics graphics(m_hDC);
	graphics.SetSmoothingMode(Gdiplus::SmoothingModeAntiAlias);
	Gdiplus::Pen pen(dwColor, nSize);
	graphics.DrawEllipse(&pen, rc.left, rc.top, rc.GetWidth(), rc.GetHeight());
}

void RenderContext_GdiPlus::FillEllipse(const UiRect& rc, DWORD dwColor)
{
	Gdiplus::Graphics graphics(m_hDC);
	graphics.SetSmoothingMode(Gdiplus::SmoothingModeAntiAlias);
	Gdiplus::SolidBrush brush(dwColor);
	graphics.FillEllipse(&brush, rc.left, rc.top, rc.GetWidth(), rc.GetHeight());
}

void RenderContext_GdiPlus::DrawPath(const IPath* path, const IPen* pen)
{
	Gdiplus::Graphics graphics(m_hDC);
	graphics.SetSmoothingMode(Gdiplus::SmoothingModeAntiAlias);
	graphics.DrawPath(((Pen_GdiPlus*)pen)->GetPen(), ((Path_Gdiplus*)path)->GetPath());
}

void RenderContext_GdiPlus::FillPath(const IPath* path, const IBrush* brush)
{
	Gdiplus::Graphics graphics(m_hDC);
	graphics.SetSmoothingMode(Gdiplus::SmoothingModeAntiAlias);
	graphics.FillPath(((Brush_Gdiplus*)brush)->GetBrush(), ((Path_Gdiplus*)path)->GetPath());
}

ui::UiRect RenderContext_GdiPlus::MeasureText(const std::wstring& strText, const std::wstring& strFontId, UINT uStyle, int width /*= DUI_NOSET_VALUE*/)
{
	Gdiplus::Graphics graphics(m_hDC);
	Gdiplus::Font font(m_hDC, GlobalManager::GetFont(strFontId));
	Gdiplus::RectF bounds;

	Gdiplus::StringFormat stringFormat = Gdiplus::StringFormat::GenericTypographic();
	int formatFlags = 0;
	if ((uStyle & DT_SINGLELINE) != 0) {
		formatFlags |= Gdiplus::StringFormatFlagsNoWrap;
	}
	stringFormat.SetFormatFlags(formatFlags);

	if (width == DUI_NOSET_VALUE) {
		graphics.MeasureString(strText.c_str(), (int)strText.length(), &font, Gdiplus::PointF(), &stringFormat, &bounds);
	}
	else {
		Gdiplus::REAL height = 0;
		if ((uStyle & DT_SINGLELINE) != 0) {
			Gdiplus::RectF rcEmpty((Gdiplus::REAL)0, (Gdiplus::REAL)0, (Gdiplus::REAL)0, (Gdiplus::REAL)0);
			graphics.MeasureString(L"<EFBFBD><EFBFBD><EFBFBD><EFBFBD>", 2, &font, rcEmpty, &stringFormat, &bounds);
			height = bounds.Height;
		}
		Gdiplus::RectF rcText((Gdiplus::REAL)0, (Gdiplus::REAL)0, (Gdiplus::REAL)width, height);
		graphics.MeasureString(strText.c_str(), (int)strText.length(), &font, rcText, &stringFormat, &bounds);
	}

	UiRect rc(int(bounds.GetLeft()), int(bounds.GetTop()), int(bounds.GetRight() + 1), int(bounds.GetBottom() + 1));
	return rc;
}

} // namespace ui