patch 8.0.1346: crash when passing 50 char string to balloon_split()

Problem:    Crash when passing 50 char string to balloon_split().
Solution:   Fix off-by-one error.

appveyor.yml

@@ -16,6 +16,7 @@ matrix:
 
 before_build:
   - '"C:\Program Files\Microsoft SDKs\Windows\v7.1\Bin\SetEnv.cmd" /x64 /release'
+  - 'set INCLUDE=%INCLUDE%C:\Program Files (x86)\Windows Kits\8.1\Include\um'
 
 build_script:
   - src/appveyor.bat

runtime/doc/options.txt

@@ -4258,8 +4258,8 @@ A jump table for the options with a short description can be found at |Q_op|.
 			{not in Vi}
 			{only available when compiled with |+mbyte|}
 	This option specifies a function that will be called to
-	activate/inactivate Input Method.
-	Does not work in the MS-Windows GUI version.
+	activate or deactivate the Input Method.
+	It is not used in the GUI.
 
 	Example: >
 		function ImActivateFunc(active)
@@ -4375,7 +4375,7 @@ A jump table for the options with a short description can be found at |Q_op|.
 			{only available when compiled with |+mbyte|}
 	This option specifies a function that is called to obtain the status
 	of Input Method.  It must return a positive number when IME is active.
-	Does not work in the MS-Windows GUI version.
+	It is not used in the GUI.
 
 	Example: >
 		function ImStatusFunc()
@@ -6154,11 +6154,34 @@ A jump table for the options with a short description can be found at |Q_op|.
 
 		Example: >
 		  set encoding=utf-8
-		  set gfn=Ricty_Diminished:h12:cSHIFTJIS
+		  set gfn=Ricty_Diminished:h12
 		  set rop=type:directx
 <
-		If select a raster font (Courier, Terminal or FixedSys) to
-		'guifont', it fallbacks to be drawn by GDI automatically.
+		If select a raster font (Courier, Terminal or FixedSys which
+		have ".fon" extension in file name) to 'guifont', it will be
+		drawn by GDI as a fallback.  This fallback will cause
+		significant slow down on drawing.
+
+		NOTE: It is known that some fonts and options combination
+		causes trouble on drawing glyphs.
+
+		  - 'rendmode:5' and 'renmode:6' will not work with some
+		    special made fonts (True-Type fonts which includes only
+		    bitmap glyphs).
+		  - 'taamode:3' will not work with some vector fonts.
+
+		NOTE: With this option, you can display colored emoji
+		(emoticon) in Windows 8.1 or later.  To display colored emoji,
+		there are some conditions which you should notice.
+
+		  - If your font includes non-colored emoji already, it will
+		    be used.
+		  - If your font doesn't have emoji, the system chooses an
+		    alternative symbol font.  On Windows 10, "Segoe UI Emoji"
+		    will be used.
+		  - When this alternative font didn't have fixed width glyph,
+		    emoji might be rendered beyond the bounding box of drawing
+		    cell.
 
 	Other render types are currently not supported.
 

src/ex_cmds.c

@@ -1825,7 +1825,6 @@ write_viminfo(char_u *file, int forceit)
     FILE	*fp_out = NULL;	/* output viminfo file */
     char_u	*tempname = NULL;	/* name of temp viminfo file */
     stat_T	st_new;		/* mch_stat() of potential new file */
-    char_u	*wp;
 #if defined(UNIX) || defined(VMS)
     mode_t	umask_save;
 #endif
@@ -1847,27 +1846,29 @@ write_viminfo(char_u *file, int forceit)
     fp_in = mch_fopen((char *)fname, READBIN);
     if (fp_in == NULL)
     {
+	int fd;
+
 	/* if it does exist, but we can't read it, don't try writing */
 	if (mch_stat((char *)fname, &st_new) == 0)
 	    goto end;
-#if defined(UNIX) || defined(VMS)
-	/*
-	 * For Unix we create the .viminfo non-accessible for others,
-	 * because it may contain text from non-accessible documents.
-	 */
-	umask_save = umask(077);
-#endif
-	fp_out = mch_fopen((char *)fname, WRITEBIN);
-#if defined(UNIX) || defined(VMS)
-	(void)umask(umask_save);
-#endif
+
+	/* Create the new .viminfo non-accessible for others, because it may
+	 * contain text from non-accessible documents. It is up to the user to
+	 * widen access (e.g. to a group). This may also fail if there is a
+	 * race condition, then just give up. */
+	fd = mch_open((char *)fname,
+			    O_CREAT|O_EXTRA|O_EXCL|O_WRONLY|O_NOFOLLOW, 0600);
+	if (fd < 0)
+	    goto end;
+	fp_out = fdopen(fd, WRITEBIN);
     }
     else
     {
 	/*
 	 * There is an existing viminfo file.  Create a temporary file to
 	 * write the new viminfo into, in the same directory as the
-	 * existing viminfo file, which will be renamed later.
+	 * existing viminfo file, which will be renamed once all writing is
+	 * successful.
 	 */
 #ifdef UNIX
 	/*
@@ -1901,12 +1902,18 @@ write_viminfo(char_u *file, int forceit)
 #endif
 
 	/*
-	 * Make tempname.
+	 * Make tempname, find one that does not exist yet.
+	 * Beware of a race condition: If someone logs out and all Vim
+	 * instances exit at the same time a temp file might be created between
+	 * stat() and open().  Use mch_open() with O_EXCL to avoid that.
 	 * May try twice: Once normal and once with shortname set, just in
 	 * case somebody puts his viminfo file in an 8.3 filesystem.
 	 */
 	for (;;)
 	{
+	    int		next_char = 'z';
+	    char_u	*wp;
+
 	    tempname = buf_modname(
 #ifdef UNIX
 				    shortname,
@@ -1924,127 +1931,129 @@ write_viminfo(char_u *file, int forceit)
 		break;
 
 	    /*
-	     * Check if tempfile already exists.  Never overwrite an
-	     * existing file!
+	     * Try a series of names.  Change one character, just before
+	     * the extension.  This should also work for an 8.3
+	     * file name, when after adding the extension it still is
+	     * the same file as the original.
 	     */
-	    if (mch_stat((char *)tempname, &st_new) == 0)
+	    wp = tempname + STRLEN(tempname) - 5;
+	    if (wp < gettail(tempname))	    /* empty file name? */
+		wp = gettail(tempname);
+	    for (;;)
 	    {
+		/*
+		 * Check if tempfile already exists.  Never overwrite an
+		 * existing file!
+		 */
+		if (mch_stat((char *)tempname, &st_new) == 0)
+		{
 #ifdef UNIX
-		/*
-		 * Check if tempfile is same as original file.  May happen
-		 * when modname() gave the same file back.  E.g.  silly
-		 * link, or file name-length reached.  Try again with
-		 * shortname set.
-		 */
-		if (!shortname && st_new.st_dev == st_old.st_dev
-					    && st_new.st_ino == st_old.st_ino)
-		{
-		    vim_free(tempname);
-		    tempname = NULL;
-		    shortname = TRUE;
-		    continue;
-		}
-#endif
-		/*
-		 * Try another name.  Change one character, just before
-		 * the extension.  This should also work for an 8.3
-		 * file name, when after adding the extension it still is
-		 * the same file as the original.
-		 */
-		wp = tempname + STRLEN(tempname) - 5;
-		if (wp < gettail(tempname))	    /* empty file name? */
-		    wp = gettail(tempname);
-		for (*wp = 'z'; mch_stat((char *)tempname, &st_new) == 0;
-								    --*wp)
-		{
 		    /*
-		     * They all exist?  Must be something wrong! Don't
-		     * write the viminfo file then.
+		     * Check if tempfile is same as original file.  May happen
+		     * when modname() gave the same file back.  E.g.  silly
+		     * link, or file name-length reached.  Try again with
+		     * shortname set.
 		     */
-		    if (*wp == 'a')
+		    if (!shortname && st_new.st_dev == st_old.st_dev
+						&& st_new.st_ino == st_old.st_ino)
 		    {
-			EMSG2(_("E929: Too many viminfo temp files, like %s!"),
-								    tempname);
 			vim_free(tempname);
 			tempname = NULL;
+			shortname = TRUE;
 			break;
 		    }
+#endif
 		}
+		else
+		{
+		    /* Try creating the file exclusively.  This may fail if
+		     * another Vim tries to do it at the same time. */
+#ifdef VMS
+		    /* fdopen() fails for some reason */
+		    umask_save = umask(077);
+		    fp_out = mch_fopen((char *)tempname, WRITEBIN);
+		    (void)umask(umask_save);
+#else
+		    int	fd;
+
+		    /* Use mch_open() to be able to use O_NOFOLLOW and set file
+		     * protection:
+		     * Unix: same as original file, but strip s-bit.  Reset
+		     * umask to avoid it getting in the way.
+		     * Others: r&w for user only. */
+# ifdef UNIX
+		    umask_save = umask(0);
+		    fd = mch_open((char *)tempname,
+			    O_CREAT|O_EXTRA|O_EXCL|O_WRONLY|O_NOFOLLOW,
+					(int)((st_old.st_mode & 0777) | 0600));
+		    (void)umask(umask_save);
+# else
+		    fd = mch_open((char *)tempname,
+			     O_CREAT|O_EXTRA|O_EXCL|O_WRONLY|O_NOFOLLOW, 0600);
+# endif
+		    if (fd < 0)
+		    {
+			fp_out = NULL;
+# ifdef EEXIST
+			/* Avoid trying lots of names while the problem is lack
+			 * of premission, only retry if the file already
+			 * exists. */
+			if (errno != EEXIST)
+			    break;
+# endif
+		    }
+		    else
+			fp_out = fdopen(fd, WRITEBIN);
+#endif /* VMS */
+		    if (fp_out != NULL)
+			break;
+		}
+
+		/* Assume file exists, try again with another name. */
+		if (next_char == 'a' - 1)
+		{
+		    /* They all exist?  Must be something wrong! Don't write
+		     * the viminfo file then. */
+		    EMSG2(_("E929: Too many viminfo temp files, like %s!"),
+								     tempname);
+		    break;
+		}
+		*wp = next_char;
+		--next_char;
 	    }
-	    break;
+
+	    if (tempname != NULL)
+		break;
+	    /* continue if shortname was set */
 	}
 
-	if (tempname != NULL)
-	{
-#ifdef VMS
-	    /* fdopen() fails for some reason */
-	    umask_save = umask(077);
-	    fp_out = mch_fopen((char *)tempname, WRITEBIN);
-	    (void)umask(umask_save);
-#else
-	    int	fd;
-
-	    /* Use mch_open() to be able to use O_NOFOLLOW and set file
-	     * protection:
-	     * Unix: same as original file, but strip s-bit.  Reset umask to
-	     * avoid it getting in the way.
-	     * Others: r&w for user only. */
-# ifdef UNIX
-	    umask_save = umask(0);
-	    fd = mch_open((char *)tempname,
-		    O_CREAT|O_EXTRA|O_EXCL|O_WRONLY|O_NOFOLLOW,
-				       (int)((st_old.st_mode & 0777) | 0600));
-	    (void)umask(umask_save);
-# else
-	    fd = mch_open((char *)tempname,
-			    O_CREAT|O_EXTRA|O_EXCL|O_WRONLY|O_NOFOLLOW, 0600);
-# endif
-	    if (fd < 0)
-		fp_out = NULL;
-	    else
-		fp_out = fdopen(fd, WRITEBIN);
-#endif /* VMS */
-
-	    /*
-	     * If we can't create in the same directory, try creating a
-	     * "normal" temp file.  This is just an attempt, renaming the temp
-	     * file might fail as well.
-	     */
-	    if (fp_out == NULL)
-	    {
-		vim_free(tempname);
-		if ((tempname = vim_tempname('o', TRUE)) != NULL)
-		    fp_out = mch_fopen((char *)tempname, WRITEBIN);
-	    }
-
 #if defined(UNIX) && defined(HAVE_FCHOWN)
+	if (tempname != NULL && fp_out != NULL)
+	{
+		stat_T	tmp_st;
+
 	    /*
 	     * Make sure the original owner can read/write the tempfile and
 	     * otherwise preserve permissions, making sure the group matches.
 	     */
-	    if (fp_out != NULL)
+	    if (mch_stat((char *)tempname, &tmp_st) >= 0)
 	    {
-		stat_T	tmp_st;
-
-		if (mch_stat((char *)tempname, &tmp_st) >= 0)
-		{
-		    if (st_old.st_uid != tmp_st.st_uid)
-			/* Changing the owner might fail, in which case the
-			 * file will now owned by the current user, oh well. */
-			ignored = fchown(fileno(fp_out), st_old.st_uid, -1);
-		    if (st_old.st_gid != tmp_st.st_gid
-			    && fchown(fileno(fp_out), -1, st_old.st_gid) == -1)
-			/* can't set the group to what it should be, remove
-			 * group permissions */
-			(void)mch_setperm(tempname, 0600);
-		}
-		else
-		    /* can't stat the file, set conservative permissions */
+		if (st_old.st_uid != tmp_st.st_uid)
+		    /* Changing the owner might fail, in which case the
+		     * file will now owned by the current user, oh well. */
+		    ignored = fchown(fileno(fp_out), st_old.st_uid, -1);
+		if (st_old.st_gid != tmp_st.st_gid
+			&& fchown(fileno(fp_out), -1, st_old.st_gid) == -1)
+		    /* can't set the group to what it should be, remove
+		     * group permissions */
 		    (void)mch_setperm(tempname, 0600);
 	    }
-#endif
+	    else
+		/* can't stat the file, set conservative permissions */
+		(void)mch_setperm(tempname, 0600);
 	}
     }
+#endif
 
     /*
      * Check if the new viminfo file can be written to.

src/gui_dwrite.cpp

@@ -4,6 +4,7 @@
  *
  * Contributors:
  *  - Ken Takata
+ *  - Yasuhiro Matsumoto
  *
  * Copyright (C) 2013 MURAOKA Taro <koron.kaoriya@gmail.com>
  * THIS FILE IS DISTRIBUTED UNDER THE VIM LICENSE.
@@ -23,7 +24,21 @@
 #include <math.h>
 #include <d2d1.h>
 #include <d2d1helper.h>
-#include <dwrite.h>
+
+// Disable these macros to compile with old VC and newer SDK (V8.1 or later).
+#if defined(_MSC_VER) && (_MSC_VER < 1700)
+# define _COM_Outptr_ __out
+# define _In_reads_(s)
+# define _In_reads_opt_(s)
+# define _Maybenull_
+# define _Out_writes_(s)
+# define _Out_writes_opt_(s)
+# define _Out_writes_to_(x, y)
+# define _Out_writes_to_opt_(x, y)
+# define _Outptr_
+#endif
+
+#include <dwrite_2.h>
 
 #include "gui_dwrite.h"
 
@@ -79,16 +94,6 @@ template <class T> inline void SafeRelease(T **ppT)
     }
 }
 
-struct GdiTextRendererContext
-{
-    // const fields.
-    COLORREF color;
-    FLOAT cellWidth;
-
-    // working fields.
-    FLOAT offsetX;
-};
-
     static DWRITE_PIXEL_GEOMETRY
 ToPixelGeometry(int value)
 {
@@ -184,17 +189,151 @@ ToInt(DWRITE_RENDERING_MODE value)
     }
 }
 
+class FontCache {
+public:
+    struct Item {
+	HFONT              hFont;
+	IDWriteTextFormat* pTextFormat;
+	DWRITE_FONT_WEIGHT fontWeight;
+	DWRITE_FONT_STYLE  fontStyle;
+	Item() : hFont(NULL), pTextFormat(NULL) {}
+    };
+
+private:
+    int mSize;
+    Item *mItems;
+
+public:
+    FontCache(int size = 2) :
+	mSize(size),
+	mItems(new Item[size])
+    {
+    }
+
+    ~FontCache()
+    {
+	for (int i = 0; i < mSize; ++i)
+	    SafeRelease(&mItems[i].pTextFormat);
+	delete[] mItems;
+    }
+
+    bool get(HFONT hFont, Item &item)
+    {
+	int n = find(hFont);
+	if (n < 0)
+	    return false;
+	item = mItems[n];
+	slide(n);
+	return true;
+    }
+
+    void put(const Item& item)
+    {
+	int n = find(item.hFont);
+	if (n < 0)
+	    n = mSize - 1;
+	if (mItems[n].pTextFormat != item.pTextFormat)
+	{
+	    SafeRelease(&mItems[n].pTextFormat);
+	    item.pTextFormat->AddRef();
+	}
+	mItems[n] = item;
+	slide(n);
+    }
+
+private:
+    int find(HFONT hFont)
+    {
+	for (int i = 0; i < mSize; ++i)
+	{
+	    if (mItems[i].hFont == hFont)
+		return i;
+	}
+	return -1;
+    }
+
+    void slide(int nextTop)
+    {
+	if (nextTop == 0)
+	    return;
+	Item tmp = mItems[nextTop];
+	for (int i = nextTop - 1; i >= 0; --i)
+	    mItems[i + 1] = mItems[i];
+	mItems[0] = tmp;
+    }
+};
+
+struct DWriteContext {
+    HDC mHDC;
+    bool mDrawing;
+    bool mFallbackDC;
+
+    ID2D1Factory *mD2D1Factory;
+
+    ID2D1DCRenderTarget *mRT;
+    ID2D1SolidColorBrush *mBrush;
+
+    IDWriteFactory *mDWriteFactory;
+    IDWriteFactory2 *mDWriteFactory2;
+
+    IDWriteGdiInterop *mGdiInterop;
+    IDWriteRenderingParams *mRenderingParams;
+
+    FontCache mFontCache;
+    IDWriteTextFormat *mTextFormat;
+    DWRITE_FONT_WEIGHT mFontWeight;
+    DWRITE_FONT_STYLE mFontStyle;
+
+    D2D1_TEXT_ANTIALIAS_MODE mTextAntialiasMode;
+
+    // METHODS
+
+    DWriteContext();
+
+    virtual ~DWriteContext();
+
+    HRESULT CreateTextFormatFromLOGFONT(const LOGFONTW &logFont,
+	    IDWriteTextFormat **ppTextFormat);
+
+    HRESULT SetFontByLOGFONT(const LOGFONTW &logFont);
+
+    void SetFont(HFONT hFont);
+
+    void BindDC(HDC hdc, RECT *rect);
+
+    void AssureDrawing();
+
+    ID2D1Brush* SolidBrush(COLORREF color);
+
+    void DrawText(const WCHAR* text, int len,
+	int x, int y, int w, int h, int cellWidth, COLORREF color,
+	UINT fuOptions, CONST RECT *lprc, CONST INT * lpDx);
+
+    void FillRect(RECT *rc, COLORREF color);
+
+    void Flush();
+
+    void SetRenderingParams(
+	    const DWriteRenderingParams *params);
+
+    DWriteRenderingParams *GetRenderingParams(
+	    DWriteRenderingParams *params);
+};
+
 class AdjustedGlyphRun : public DWRITE_GLYPH_RUN
 {
 private:
+    FLOAT &mAccum;
     FLOAT mDelta;
     FLOAT *mAdjustedAdvances;
 
 public:
     AdjustedGlyphRun(
 	    const DWRITE_GLYPH_RUN *glyphRun,
-	    FLOAT cellWidth) :
+	    FLOAT cellWidth,
+	    FLOAT &accum) :
 	DWRITE_GLYPH_RUN(*glyphRun),
+	mAccum(accum),
 	mDelta(0.0f),
 	mAdjustedAdvances(new FLOAT[glyphRun->glyphCount])
     {
@@ -209,45 +348,44 @@ public:
 	glyphAdvances = mAdjustedAdvances;
     }
 
-    ~AdjustedGlyphRun(void)
+    ~AdjustedGlyphRun()
     {
+	mAccum += mDelta;
 	delete[] mAdjustedAdvances;
     }
 
-    FLOAT getDelta(void) const
-    {
-	return mDelta;
-    }
-
     static FLOAT adjustToCell(FLOAT value, FLOAT cellWidth)
     {
-	int cellCount = (int)floor(value / cellWidth + 0.5f);
+	int cellCount = int(floor(value / cellWidth + 0.5f));
 	if (cellCount < 1)
 	    cellCount = 1;
 	return cellCount * cellWidth;
     }
 };
 
-class GdiTextRenderer FINAL : public IDWriteTextRenderer
+struct TextRendererContext {
+    // const fields.
+    COLORREF color;
+    FLOAT cellWidth;
+
+    // working fields.
+    FLOAT offsetX;
+};
+
+class TextRenderer FINAL : public IDWriteTextRenderer
 {
 public:
-    GdiTextRenderer(
-	    IDWriteBitmapRenderTarget* bitmapRenderTarget,
-	    IDWriteRenderingParams* renderingParams) :
+    TextRenderer(
+	    DWriteContext* pDWC) :
 	cRefCount_(0),
-	pRenderTarget_(bitmapRenderTarget),
-	pRenderingParams_(renderingParams)
+	pDWC_(pDWC)
     {
-	pRenderTarget_->AddRef();
-	pRenderingParams_->AddRef();
 	AddRef();
     }
 
     // add "virtual" to avoid a compiler warning
-    virtual ~GdiTextRenderer()
+    virtual ~TextRenderer()
     {
-	SafeRelease(&pRenderTarget_);
-	SafeRelease(&pRenderingParams_);
     }
 
     IFACEMETHOD(IsPixelSnappingDisabled)(
@@ -263,7 +401,8 @@ public:
 	__out DWRITE_MATRIX* transform)
     {
 	// forward the render target's transform
-	pRenderTarget_->GetCurrentTransform(transform);
+	pDWC_->mRT->GetTransform(
+		reinterpret_cast<D2D1_MATRIX_3X2_F*>(transform));
 	return S_OK;
     }
 
@@ -271,43 +410,12 @@ public:
 	__maybenull void* clientDrawingContext,
 	__out FLOAT* pixelsPerDip)
     {
-	*pixelsPerDip = pRenderTarget_->GetPixelsPerDip();
+	float dpiX, unused;
+	pDWC_->mRT->GetDpi(&dpiX, &unused);
+	*pixelsPerDip = dpiX / 96.0f;
 	return S_OK;
     }
 
-    IFACEMETHOD(DrawGlyphRun)(
-	__maybenull void* clientDrawingContext,
-	FLOAT baselineOriginX,
-	FLOAT baselineOriginY,
-	DWRITE_MEASURING_MODE measuringMode,
-	__in DWRITE_GLYPH_RUN const* glyphRun,
-	__in DWRITE_GLYPH_RUN_DESCRIPTION const* glyphRunDescription,
-	IUnknown* clientDrawingEffect)
-    {
-	HRESULT hr = S_OK;
-
-	GdiTextRendererContext *context =
-	    reinterpret_cast<GdiTextRendererContext*>(clientDrawingContext);
-
-	AdjustedGlyphRun adjustedGlyphRun(glyphRun, context->cellWidth);
-
-	// Pass on the drawing call to the render target to do the real work.
-	RECT dirtyRect = {0};
-
-	hr = pRenderTarget_->DrawGlyphRun(
-		baselineOriginX + context->offsetX,
-		baselineOriginY,
-		measuringMode,
-		&adjustedGlyphRun,
-		pRenderingParams_,
-		context->color,
-		&dirtyRect);
-
-	context->offsetX += adjustedGlyphRun.getDelta();
-
-	return hr;
-    }
-
     IFACEMETHOD(DrawUnderline)(
 	__maybenull void* clientDrawingContext,
 	FLOAT baselineOriginX,
@@ -340,6 +448,69 @@ public:
 	return E_NOTIMPL;
     }
 
+    IFACEMETHOD(DrawGlyphRun)(
+	__maybenull void* clientDrawingContext,
+	FLOAT baselineOriginX,
+	FLOAT baselineOriginY,
+	DWRITE_MEASURING_MODE measuringMode,
+	__in DWRITE_GLYPH_RUN const* glyphRun,
+	__in DWRITE_GLYPH_RUN_DESCRIPTION const* glyphRunDescription,
+	IUnknown* clientDrawingEffect)
+    {
+	TextRendererContext *context =
+	    reinterpret_cast<TextRendererContext*>(clientDrawingContext);
+
+	AdjustedGlyphRun adjustedGlyphRun(glyphRun, context->cellWidth,
+		context->offsetX);
+
+	if (pDWC_->mDWriteFactory2 != NULL)
+	{
+	    IDWriteColorGlyphRunEnumerator *enumerator = NULL;
+	    HRESULT hr = pDWC_->mDWriteFactory2->TranslateColorGlyphRun(
+		baselineOriginX + context->offsetX,
+		baselineOriginY,
+		&adjustedGlyphRun,
+		NULL,
+		DWRITE_MEASURING_MODE_GDI_NATURAL,
+		NULL,
+		0,
+		&enumerator);
+	    if (SUCCEEDED(hr))
+	    {
+		// Draw by IDWriteFactory2 for color emoji
+		BOOL hasRun = TRUE;
+		enumerator->MoveNext(&hasRun);
+		while (hasRun)
+		{
+		    const DWRITE_COLOR_GLYPH_RUN* colorGlyphRun;
+		    enumerator->GetCurrentRun(&colorGlyphRun);
+
+		    pDWC_->mBrush->SetColor(colorGlyphRun->runColor);
+		    pDWC_->mRT->DrawGlyphRun(
+			    D2D1::Point2F(
+				colorGlyphRun->baselineOriginX,
+				colorGlyphRun->baselineOriginY),
+			    &colorGlyphRun->glyphRun,
+			    pDWC_->mBrush,
+			    DWRITE_MEASURING_MODE_NATURAL);
+		    enumerator->MoveNext(&hasRun);
+		}
+		SafeRelease(&enumerator);
+		return S_OK;
+	    }
+	}
+
+	// Draw by IDWriteFactory (without color emoji)
+	pDWC_->mRT->DrawGlyphRun(
+		D2D1::Point2F(
+		    baselineOriginX + context->offsetX,
+		    baselineOriginY),
+		&adjustedGlyphRun,
+		pDWC_->SolidBrush(context->color),
+		DWRITE_MEASURING_MODE_NATURAL);
+	return S_OK;
+    }
+
 public:
     IFACEMETHOD_(unsigned long, AddRef) ()
     {
@@ -385,80 +556,28 @@ public:
 
 private:
     long cRefCount_;
-    IDWriteBitmapRenderTarget* pRenderTarget_;
-    IDWriteRenderingParams* pRenderingParams_;
-};
-
-struct DWriteContext {
-    FLOAT mDpiScaleX;
-    FLOAT mDpiScaleY;
-    bool mDrawing;
-
-    ID2D1Factory *mD2D1Factory;
-
-    ID2D1DCRenderTarget *mRT;
-    ID2D1SolidColorBrush *mBrush;
-
-    IDWriteFactory *mDWriteFactory;
-    IDWriteGdiInterop *mGdiInterop;
-    IDWriteRenderingParams *mRenderingParams;
-    IDWriteTextFormat *mTextFormat;
-
-    HFONT mLastHFont;
-    DWRITE_FONT_WEIGHT mFontWeight;
-    DWRITE_FONT_STYLE mFontStyle;
-
-    D2D1_TEXT_ANTIALIAS_MODE mTextAntialiasMode;
-
-    // METHODS
-
-    DWriteContext();
-
-    virtual ~DWriteContext();
-
-    HRESULT SetLOGFONT(const LOGFONTW &logFont, float fontSize);
-
-    void SetFont(HFONT hFont);
-
-    void SetFont(const LOGFONTW &logFont);
-
-    void DrawText(HDC hdc, const WCHAR* text, int len,
-	int x, int y, int w, int h, int cellWidth, COLORREF color);
-
-    float PixelsToDipsX(int x);
-
-    float PixelsToDipsY(int y);
-
-    void SetRenderingParams(
-	    const DWriteRenderingParams *params);
-
-    DWriteRenderingParams *GetRenderingParams(
-	    DWriteRenderingParams *params);
+    DWriteContext* pDWC_;
 };
 
 DWriteContext::DWriteContext() :
-    mDpiScaleX(1.f),
-    mDpiScaleY(1.f),
+    mHDC(NULL),
     mDrawing(false),
+    mFallbackDC(false),
     mD2D1Factory(NULL),
     mRT(NULL),
     mBrush(NULL),
     mDWriteFactory(NULL),
+    mDWriteFactory2(NULL),
     mGdiInterop(NULL),
     mRenderingParams(NULL),
+    mFontCache(8),
     mTextFormat(NULL),
-    mLastHFont(NULL),
     mFontWeight(DWRITE_FONT_WEIGHT_NORMAL),
     mFontStyle(DWRITE_FONT_STYLE_NORMAL),
     mTextAntialiasMode(D2D1_TEXT_ANTIALIAS_MODE_DEFAULT)
 {
     HRESULT hr;
 
-    HDC screen = ::GetDC(0);
-    mDpiScaleX = ::GetDeviceCaps(screen, LOGPIXELSX) / 96.0f;
-    mDpiScaleY = ::GetDeviceCaps(screen, LOGPIXELSY) / 96.0f;
-    ::ReleaseDC(0, screen);
-
     hr = D2D1CreateFactory(D2D1_FACTORY_TYPE_SINGLE_THREADED,
 	    __uuidof(ID2D1Factory), NULL,
 	    reinterpret_cast<void**>(&mD2D1Factory));
@@ -495,6 +614,15 @@ DWriteContext::DWriteContext() :
 		mDWriteFactory);
     }
 
+    if (SUCCEEDED(hr))
+    {
+	DWriteCreateFactory(
+		DWRITE_FACTORY_TYPE_SHARED,
+		__uuidof(IDWriteFactory2),
+		reinterpret_cast<IUnknown**>(&mDWriteFactory2));
+	_RPT1(_CRT_WARN, "IDWriteFactory2: %s\n", SUCCEEDED(hr) ? "available" : "not available");
+    }
+
     if (SUCCEEDED(hr))
     {
 	hr = mDWriteFactory->GetGdiInterop(&mGdiInterop);
@@ -515,20 +643,24 @@ DWriteContext::~DWriteContext()
     SafeRelease(&mRenderingParams);
     SafeRelease(&mGdiInterop);
     SafeRelease(&mDWriteFactory);
+    SafeRelease(&mDWriteFactory2);
     SafeRelease(&mBrush);
     SafeRelease(&mRT);
     SafeRelease(&mD2D1Factory);
 }
 
     HRESULT
-DWriteContext::SetLOGFONT(const LOGFONTW &logFont, float fontSize)
+DWriteContext::CreateTextFormatFromLOGFONT(const LOGFONTW &logFont,
+	IDWriteTextFormat **ppTextFormat)
 {
-    // Most of this function is copy from: http://msdn.microsoft.com/en-us/library/windows/desktop/dd941783(v=vs.85).aspx
+    // Most of this function is copied from: https://github.com/Microsoft/Windows-classic-samples/blob/master/Samples/Win7Samples/multimedia/DirectWrite/RenderTest/TextHelpers.cpp
     HRESULT hr = S_OK;
+    IDWriteTextFormat *pTextFormat = NULL;
 
     IDWriteFont *font = NULL;
     IDWriteFontFamily *fontFamily = NULL;
     IDWriteLocalizedStrings *localizedFamilyNames = NULL;
+    float fontSize = 0;
 
     if (SUCCEEDED(hr))
     {
@@ -561,33 +693,30 @@ DWriteContext::SetLOGFONT(const LOGFONTW &logFont, float fontSize)
 
     if (SUCCEEDED(hr))
     {
-	// If no font size was passed in use the lfHeight of the LOGFONT.
-	if (fontSize == 0)
+	// Use lfHeight of the LOGFONT as font size.
+	fontSize = float(logFont.lfHeight);
+
+	if (fontSize < 0)
 	{
-	    // Convert from pixels to DIPs.
-	    fontSize = PixelsToDipsY(logFont.lfHeight);
-	    if (fontSize < 0)
-	    {
-		// Negative lfHeight represents the size of the em unit.
-		fontSize = -fontSize;
-	    }
-	    else
-	    {
-		// Positive lfHeight represents the cell height (ascent +
-		// descent).
-		DWRITE_FONT_METRICS fontMetrics;
-		font->GetMetrics(&fontMetrics);
+	    // Negative lfHeight represents the size of the em unit.
+	    fontSize = -fontSize;
+	}
+	else
+	{
+	    // Positive lfHeight represents the cell height (ascent +
+	    // descent).
+	    DWRITE_FONT_METRICS fontMetrics;
+	    font->GetMetrics(&fontMetrics);
 
-		// Convert the cell height (ascent + descent) from design units
-		// to ems.
-		float cellHeight = static_cast<float>(
-			fontMetrics.ascent + fontMetrics.descent)
-					       / fontMetrics.designUnitsPerEm;
+	    // Convert the cell height (ascent + descent) from design units
+	    // to ems.
+	    float cellHeight = static_cast<float>(
+		    fontMetrics.ascent + fontMetrics.descent)
+		/ fontMetrics.designUnitsPerEm;
 
-		// Divide the font size by the cell height to get the font em
-		// size.
-		fontSize /= cellHeight;
-	    }
+	    // Divide the font size by the cell height to get the font em
+	    // size.
+	    fontSize /= cellHeight;
 	}
     }
 
@@ -612,123 +741,165 @@ DWriteContext::SetLOGFONT(const LOGFONTW &logFont, float fontSize)
 		font->GetStretch(),
 		fontSize,
 		localeName,
-		&mTextFormat);
+		&pTextFormat);
     }
 
     if (SUCCEEDED(hr))
-    {
-	mFontWeight = static_cast<DWRITE_FONT_WEIGHT>(logFont.lfWeight);
-	mFontStyle = logFont.lfItalic ? DWRITE_FONT_STYLE_ITALIC
-	    : DWRITE_FONT_STYLE_NORMAL;
-    }
+	hr = pTextFormat->SetTextAlignment(DWRITE_TEXT_ALIGNMENT_LEADING);
+
+    if (SUCCEEDED(hr))
+	hr = pTextFormat->SetParagraphAlignment(
+		DWRITE_PARAGRAPH_ALIGNMENT_CENTER);
+
+    if (SUCCEEDED(hr))
+	hr = pTextFormat->SetWordWrapping(DWRITE_WORD_WRAPPING_NO_WRAP);
 
     SafeRelease(&localizedFamilyNames);
     SafeRelease(&fontFamily);
     SafeRelease(&font);
 
+    if (SUCCEEDED(hr))
+	*ppTextFormat = pTextFormat;
+    else
+	SafeRelease(&pTextFormat);
+
+    return hr;
+}
+
+    HRESULT
+DWriteContext::SetFontByLOGFONT(const LOGFONTW &logFont)
+{
+    HRESULT hr = S_OK;
+    IDWriteTextFormat *pTextFormat = NULL;
+
+    hr = CreateTextFormatFromLOGFONT(logFont, &pTextFormat);
+
+    if (SUCCEEDED(hr))
+    {
+	SafeRelease(&mTextFormat);
+	mTextFormat = pTextFormat;
+	mFontWeight = static_cast<DWRITE_FONT_WEIGHT>(logFont.lfWeight);
+	mFontStyle = logFont.lfItalic ? DWRITE_FONT_STYLE_ITALIC
+	    : DWRITE_FONT_STYLE_NORMAL;
+    }
+
     return hr;
 }
 
     void
 DWriteContext::SetFont(HFONT hFont)
 {
-    if (mLastHFont != hFont)
+    FontCache::Item item;
+    if (mFontCache.get(hFont, item))
     {
-	LOGFONTW lf;
-	if (GetObjectW(hFont, sizeof(lf), &lf))
+	if (item.pTextFormat != NULL)
 	{
-	    SetFont(lf);
-	    mLastHFont = hFont;
+	    item.pTextFormat->AddRef();
+	    SafeRelease(&mTextFormat);
+	    mTextFormat = item.pTextFormat;
+	    mFontWeight = item.fontWeight;
+	    mFontStyle = item.fontStyle;
+	    mFallbackDC = false;
 	}
+	else
+	    mFallbackDC = true;
+	return;
     }
+
+    HRESULT hr = E_FAIL;
+    LOGFONTW lf;
+    if (GetObjectW(hFont, sizeof(lf), &lf))
+	hr = SetFontByLOGFONT(lf);
+
+    item.hFont = hFont;
+    if (SUCCEEDED(hr))
+    {
+	item.pTextFormat = mTextFormat;
+	item.fontWeight = mFontWeight;
+	item.fontStyle = mFontStyle;
+    }
+    mFontCache.put(item);
 }
 
     void
-DWriteContext::SetFont(const LOGFONTW &logFont)
+DWriteContext::BindDC(HDC hdc, RECT *rect)
 {
-    SafeRelease(&mTextFormat);
-    mLastHFont = NULL;
-
-    HRESULT hr = SetLOGFONT(logFont, 0.f);
-
-    if (SUCCEEDED(hr))
-	hr = mTextFormat->SetTextAlignment(DWRITE_TEXT_ALIGNMENT_LEADING);
-
-    if (SUCCEEDED(hr))
-	hr = mTextFormat->SetParagraphAlignment(
-		DWRITE_PARAGRAPH_ALIGNMENT_CENTER);
-
-    if (SUCCEEDED(hr))
-	hr = mTextFormat->SetWordWrapping(DWRITE_WORD_WRAPPING_NO_WRAP);
+    Flush();
+    mRT->BindDC(hdc, rect);
+    mRT->SetTransform(D2D1::IdentityMatrix());
+    mHDC = hdc;
 }
 
     void
-DWriteContext::DrawText(HDC hdc, const WCHAR* text, int len,
-	int x, int y, int w, int h, int cellWidth, COLORREF color)
+DWriteContext::AssureDrawing()
 {
-    HRESULT hr = S_OK;
-    IDWriteBitmapRenderTarget *bmpRT = NULL;
+    if (mDrawing == false)
+    {
+	mRT->BeginDraw();
+	mDrawing = true;
+    }
+}
 
-    // Skip when any fonts are not set.
-    if (mTextFormat == NULL)
+    ID2D1Brush*
+DWriteContext::SolidBrush(COLORREF color)
+{
+    mBrush->SetColor(D2D1::ColorF(UINT32(GetRValue(color)) << 16 |
+		UINT32(GetGValue(color)) << 8 | UINT32(GetBValue(color))));
+    return mBrush;
+}
+
+    void
+DWriteContext::DrawText(const WCHAR* text, int len,
+	int x, int y, int w, int h, int cellWidth, COLORREF color,
+	UINT fuOptions, CONST RECT *lprc, CONST INT * lpDx)
+{
+    if (mFallbackDC)
+    {
+	Flush();
+	ExtTextOutW(mHDC, x, y, fuOptions, lprc, text, len, lpDx);
 	return;
+    }
 
-    // Check possibility of zero divided error.
-    if (cellWidth == 0 || mDpiScaleX == 0.0f || mDpiScaleY == 0.0f)
-	return;
+    AssureDrawing();
 
-    if (SUCCEEDED(hr))
-	hr = mGdiInterop->CreateBitmapRenderTarget(hdc, w, h, &bmpRT);
+    HRESULT hr;
+    IDWriteTextLayout *textLayout = NULL;
+
+    hr = mDWriteFactory->CreateTextLayout(text, len, mTextFormat,
+	    FLOAT(w), FLOAT(h), &textLayout);
 
     if (SUCCEEDED(hr))
     {
-	IDWriteTextLayout *textLayout = NULL;
+	DWRITE_TEXT_RANGE textRange = { 0, UINT32(len) };
+	textLayout->SetFontWeight(mFontWeight, textRange);
+	textLayout->SetFontStyle(mFontStyle, textRange);
 
-	HDC memdc = bmpRT->GetMemoryDC();
-	BitBlt(memdc, 0, 0, w, h, hdc, x, y, SRCCOPY);
-
-	hr = mDWriteFactory->CreateGdiCompatibleTextLayout(
-		text, len, mTextFormat, PixelsToDipsX(w),
-		PixelsToDipsY(h), mDpiScaleX, NULL, TRUE, &textLayout);
-
-	if (SUCCEEDED(hr))
-	{
-	    DWRITE_TEXT_RANGE textRange = { 0, (UINT32)len };
-	    textLayout->SetFontWeight(mFontWeight, textRange);
-	    textLayout->SetFontStyle(mFontStyle, textRange);
-	}
-
-	if (SUCCEEDED(hr))
-	{
-	    GdiTextRenderer *renderer = new GdiTextRenderer(bmpRT,
-		    mRenderingParams);
-	    GdiTextRendererContext data = {
-		color,
-		PixelsToDipsX(cellWidth),
-		0.0f
-	    };
-	    textLayout->Draw(&data, renderer, 0, 0);
-	    SafeRelease(&renderer);
-	}
-
-	BitBlt(hdc, x, y, w, h, memdc, 0, 0, SRCCOPY);
-
-	SafeRelease(&textLayout);
+	TextRenderer renderer(this);
+	TextRendererContext context = { color, FLOAT(cellWidth), 0.0f };
+	textLayout->Draw(&context, &renderer, FLOAT(x), FLOAT(y));
     }
 
-    SafeRelease(&bmpRT);
+    SafeRelease(&textLayout);
 }
 
-    float
-DWriteContext::PixelsToDipsX(int x)
+    void
+DWriteContext::FillRect(RECT *rc, COLORREF color)
 {
-    return x / mDpiScaleX;
+    AssureDrawing();
+    mRT->FillRectangle(
+	    D2D1::RectF(FLOAT(rc->left), FLOAT(rc->top),
+		FLOAT(rc->right), FLOAT(rc->bottom)),
+	    SolidBrush(color));
 }
 
-    float
-DWriteContext::PixelsToDipsY(int y)
+    void
+DWriteContext::Flush()
 {
-    return y / mDpiScaleY;
+    if (mDrawing)
+    {
+	mRT->EndDraw();
+	mDrawing = false;
+    }
 }
 
     void
@@ -757,6 +928,10 @@ DWriteContext::SetRenderingParams(
 	SafeRelease(&mRenderingParams);
 	mRenderingParams = renderingParams;
 	mTextAntialiasMode = textAntialiasMode;
+
+	Flush();
+	mRT->SetTextRenderingParams(mRenderingParams);
+	mRT->SetTextAntialiasMode(mTextAntialiasMode);
     }
 }
 
@@ -824,40 +999,23 @@ DWriteContext_Open(void)
     return new DWriteContext();
 }
 
-    void
-DWriteContext_BeginDraw(DWriteContext *ctx)
-{
-    if (ctx != NULL && ctx->mRT != NULL)
-    {
-	ctx->mRT->BeginDraw();
-	ctx->mRT->SetTransform(D2D1::IdentityMatrix());
-	ctx->mDrawing = true;
-    }
-}
-
     void
 DWriteContext_BindDC(DWriteContext *ctx, HDC hdc, RECT *rect)
 {
-    if (ctx != NULL && ctx->mRT != NULL)
-    {
-	ctx->mRT->BindDC(hdc, rect);
-	ctx->mRT->SetTextAntialiasMode(ctx->mTextAntialiasMode);
-    }
+    if (ctx != NULL)
+	ctx->BindDC(hdc, rect);
 }
 
     void
 DWriteContext_SetFont(DWriteContext *ctx, HFONT hFont)
 {
     if (ctx != NULL)
-    {
 	ctx->SetFont(hFont);
-    }
 }
 
     void
 DWriteContext_DrawText(
 	DWriteContext *ctx,
-	HDC hdc,
 	const WCHAR* text,
 	int len,
 	int x,
@@ -865,20 +1023,28 @@ DWriteContext_DrawText(
 	int w,
 	int h,
 	int cellWidth,
-	COLORREF color)
+	COLORREF color,
+	UINT fuOptions,
+	CONST RECT *lprc,
+	CONST INT * lpDx)
 {
     if (ctx != NULL)
-	ctx->DrawText(hdc, text, len, x, y, w, h, cellWidth, color);
+	ctx->DrawText(text, len, x, y, w, h, cellWidth, color,
+		fuOptions, lprc, lpDx);
 }
 
     void
-DWriteContext_EndDraw(DWriteContext *ctx)
+DWriteContext_FillRect(DWriteContext *ctx, RECT *rc, COLORREF color)
 {
-    if (ctx != NULL && ctx->mRT != NULL)
-    {
-	ctx->mRT->EndDraw();
-	ctx->mDrawing = false;
-    }
+    if (ctx != NULL)
+	ctx->FillRect(rc, color);
+}
+
+    void
+DWriteContext_Flush(DWriteContext *ctx)
+{
+    if (ctx != NULL)
+	ctx->Flush();
 }
 
     void

src/gui_dwrite.h

@@ -4,6 +4,7 @@
  *
  * Contributors:
  *  - Ken Takata
+ *  - Yasuhiro Matsumoto
  *
  * Copyright (C) 2013 MURAOKA Taro <koron.kaoriya@gmail.com>
  * THIS FILE IS DISTRIBUTED UNDER THE VIM LICENSE.
@@ -54,12 +55,10 @@ void DWrite_Init(void);
 void DWrite_Final(void);
 
 DWriteContext *DWriteContext_Open(void);
-void DWriteContext_BeginDraw(DWriteContext *ctx);
 void DWriteContext_BindDC(DWriteContext *ctx, HDC hdc, RECT *rect);
 void DWriteContext_SetFont(DWriteContext *ctx, HFONT hFont);
 void DWriteContext_DrawText(
 	DWriteContext *ctx,
-	HDC hdc,
 	const WCHAR* text,
 	int len,
 	int x,
@@ -67,8 +66,12 @@ void DWriteContext_DrawText(
 	int w,
 	int h,
 	int cellWidth,
-	COLORREF color);
-void DWriteContext_EndDraw(DWriteContext *ctx);
+	COLORREF color,
+	UINT fuOptions,
+	CONST RECT *lprc,
+	CONST INT * lpDx);
+void DWriteContext_FillRect(DWriteContext *ctx, RECT *rc, COLORREF color);
+void DWriteContext_Flush(DWriteContext *ctx);
 void DWriteContext_Close(DWriteContext *ctx);
 
 void DWriteContext_SetRenderingParams(

src/gui_w32.c

@@ -34,28 +34,14 @@ static DWriteContext *s_dwc = NULL;
 static int s_directx_enabled = 0;
 static int s_directx_load_attempted = 0;
 # define IS_ENABLE_DIRECTX() (s_directx_enabled && s_dwc != NULL)
+static int directx_enabled(void);
+static void directx_binddc(void);
 #endif
 
 #ifdef FEAT_MENU
 static int gui_mswin_get_menu_height(int fix_window);
 #endif
 
-#if defined(FEAT_DIRECTX) || defined(PROTO)
-    int
-directx_enabled(void)
-{
-    if (s_dwc != NULL)
-	return 1;
-    else if (s_directx_load_attempted)
-	return 0;
-    /* load DirectX */
-    DWrite_Init();
-    s_directx_load_attempted = 1;
-    s_dwc = DWriteContext_Open();
-    return s_dwc != NULL ? 1 : 0;
-}
-#endif
-
 #if defined(FEAT_RENDER_OPTIONS) || defined(PROTO)
     int
 gui_mch_set_rendering_options(char_u *s)
@@ -369,6 +355,34 @@ static int allow_scrollbar = FALSE;
 # define MyTranslateMessage(x) TranslateMessage(x)
 #endif
 
+#if defined(FEAT_DIRECTX)
+    static int
+directx_enabled(void)
+{
+    if (s_dwc != NULL)
+	return 1;
+    else if (s_directx_load_attempted)
+	return 0;
+    /* load DirectX */
+    DWrite_Init();
+    s_directx_load_attempted = 1;
+    s_dwc = DWriteContext_Open();
+    directx_binddc();
+    return s_dwc != NULL ? 1 : 0;
+}
+
+    static void
+directx_binddc(void)
+{
+    if (s_textArea != NULL)
+    {
+	RECT	rect;
+	GetClientRect(s_textArea, &rect);
+	DWriteContext_BindDC(s_dwc, s_hdc, &rect);
+    }
+}
+#endif
+
 #if defined(FEAT_MBYTE) || defined(GLOBAL_IME)
   /* use of WindowProc depends on wide_WindowProc */
 # define MyWindowProc vim_WindowProc
@@ -589,6 +603,10 @@ _OnBlinkTimer(
 	blink_timer = (UINT) SetTimer(NULL, 0, (UINT)blink_ontime,
 						    (TIMERPROC)_OnBlinkTimer);
     }
+#if defined(FEAT_DIRECTX)
+    if (IS_ENABLE_DIRECTX())
+	DWriteContext_Flush(s_dwc);
+#endif
 }
 
     static void
@@ -1000,6 +1018,19 @@ _OnMouseMoveOrRelease(
     _OnMouseEvent(button, x, y, FALSE, keyFlags);
 }
 
+    static void
+_OnSizeTextArea(
+    HWND hwnd UNUSED,
+    UINT state UNUSED,
+    int cx UNUSED,
+    int cy UNUSED)
+{
+#if defined(FEAT_DIRECTX)
+    if (IS_ENABLE_DIRECTX())
+	directx_binddc();
+#endif
+}
+
 #ifdef FEAT_MENU
 /*
  * Find the vimmenu_T with the given id
@@ -1234,6 +1265,7 @@ _TextAreaWndProc(
 	HANDLE_MSG(hwnd, WM_XBUTTONDBLCLK,_OnMouseButtonDown);
 	HANDLE_MSG(hwnd, WM_XBUTTONDOWN,_OnMouseButtonDown);
 	HANDLE_MSG(hwnd, WM_XBUTTONUP,	_OnMouseMoveOrRelease);
+	HANDLE_MSG(hwnd, WM_SIZE,	_OnSizeTextArea);
 
 #ifdef FEAT_BEVAL_GUI
 	case WM_NOTIFY: Handle_WM_Notify(hwnd, (LPNMHDR)lParam);
@@ -1633,6 +1665,11 @@ gui_mch_invert_rectangle(
 {
     RECT    rc;
 
+#if defined(FEAT_DIRECTX)
+    if (IS_ENABLE_DIRECTX())
+	DWriteContext_Flush(s_dwc);
+#endif
+
     /*
      * Note: InvertRect() excludes right and bottom of rectangle.
      */
@@ -1661,6 +1698,11 @@ gui_mch_draw_hollow_cursor(guicolor_T color)
     HBRUSH  hbr;
     RECT    rc;
 
+#if defined(FEAT_DIRECTX)
+    if (IS_ENABLE_DIRECTX())
+	DWriteContext_Flush(s_dwc);
+#endif
+
     /*
      * Note: FrameRect() excludes right and bottom of rectangle.
      */
@@ -1701,6 +1743,12 @@ gui_mch_draw_part_cursor(
     rc.top = FILL_Y(gui.row) + gui.char_height - h;
     rc.right = rc.left + w;
     rc.bottom = rc.top + h;
+
+#if defined(FEAT_DIRECTX)
+    if (IS_ENABLE_DIRECTX())
+	DWriteContext_Flush(s_dwc);
+#endif
+
     hbr = CreateSolidBrush(color);
     FillRect(s_hdc, &rc, hbr);
     DeleteBrush(hbr);
@@ -2856,10 +2904,6 @@ _OnPaint(
 
 	out_flush();	    /* make sure all output has been processed */
 	(void)BeginPaint(hwnd, &ps);
-#if defined(FEAT_DIRECTX)
-	if (IS_ENABLE_DIRECTX())
-	    DWriteContext_BeginDraw(s_dwc);
-#endif
 
 #ifdef FEAT_MBYTE
 	/* prevent multi-byte characters from misprinting on an invalid
@@ -2876,19 +2920,11 @@ _OnPaint(
 
 	if (!IsRectEmpty(&ps.rcPaint))
 	{
-#if defined(FEAT_DIRECTX)
-	    if (IS_ENABLE_DIRECTX())
-		DWriteContext_BindDC(s_dwc, s_hdc, &ps.rcPaint);
-#endif
 	    gui_redraw(ps.rcPaint.left, ps.rcPaint.top,
 		    ps.rcPaint.right - ps.rcPaint.left + 1,
 		    ps.rcPaint.bottom - ps.rcPaint.top + 1);
 	}
 
-#if defined(FEAT_DIRECTX)
-	if (IS_ENABLE_DIRECTX())
-	    DWriteContext_EndDraw(s_dwc);
-#endif
 	EndPaint(hwnd, &ps);
     }
 }
@@ -3010,6 +3046,11 @@ gui_mch_flash(int msec)
 {
     RECT    rc;
 
+#if defined(FEAT_DIRECTX)
+    if (IS_ENABLE_DIRECTX())
+	DWriteContext_Flush(s_dwc);
+#endif
+
     /*
      * Note: InvertRect() excludes right and bottom of rectangle.
      */
@@ -3082,6 +3123,12 @@ gui_mch_delete_lines(
 
     intel_gpu_workaround();
 
+#if defined(FEAT_DIRECTX)
+    // Commit drawing queue before ScrollWindowEx.
+    if (IS_ENABLE_DIRECTX())
+	DWriteContext_Flush(s_dwc);
+#endif
+
     rc.left = FILL_X(gui.scroll_region_left);
     rc.right = FILL_X(gui.scroll_region_right + 1);
     rc.top = FILL_Y(row);
@@ -3115,6 +3162,12 @@ gui_mch_insert_lines(
 
     intel_gpu_workaround();
 
+#if defined(FEAT_DIRECTX)
+    // Commit drawing queue before ScrollWindowEx.
+    if (IS_ENABLE_DIRECTX())
+	DWriteContext_Flush(s_dwc);
+#endif
+
     rc.left = FILL_X(gui.scroll_region_left);
     rc.right = FILL_X(gui.scroll_region_right + 1);
     rc.top = FILL_Y(row);
@@ -6145,9 +6198,6 @@ gui_mch_draw_string(
 #endif
     HPEN	hpen, old_pen;
     int		y;
-#ifdef FEAT_DIRECTX
-    int		font_is_ttf_or_vector = 0;
-#endif
 
     /*
      * Italic and bold text seems to have an extra row of pixels at the bottom
@@ -6208,6 +6258,11 @@ gui_mch_draw_string(
 	    hbr = hbr_cache[brush_lru];
 	    brush_lru = !brush_lru;
 	}
+
+#if defined(FEAT_DIRECTX)
+	if (IS_ENABLE_DIRECTX())
+	    DWriteContext_FillRect(s_dwc, &rc, gui.currBgColor);
+#endif
 	FillRect(s_hdc, &rc, hbr);
 
 	SetBkMode(s_hdc, TRANSPARENT);
@@ -6227,16 +6282,7 @@ gui_mch_draw_string(
 
 #ifdef FEAT_DIRECTX
     if (IS_ENABLE_DIRECTX())
-    {
-	TEXTMETRIC tm;
-
-	GetTextMetrics(s_hdc, &tm);
-	if (tm.tmPitchAndFamily & (TMPF_TRUETYPE | TMPF_VECTOR))
-	{
-	    font_is_ttf_or_vector = 1;
-	    DWriteContext_SetFont(s_dwc, (HFONT)gui.currFont);
-	}
-    }
+	DWriteContext_SetFont(s_dwc, (HFONT)gui.currFont);
 #endif
 
     if (pad_size != Columns || padding == NULL || padding[0] != gui.char_width)
@@ -6347,12 +6393,13 @@ gui_mch_draw_string(
 	    ++clen;
 	}
 #if defined(FEAT_DIRECTX)
-	if (IS_ENABLE_DIRECTX() && font_is_ttf_or_vector)
+	if (IS_ENABLE_DIRECTX())
 	{
 	    /* Add one to "cells" for italics. */
-	    DWriteContext_DrawText(s_dwc, s_hdc, unicodebuf, wlen,
+	    DWriteContext_DrawText(s_dwc, unicodebuf, wlen,
 		    TEXT_X(col), TEXT_Y(row), FILL_X(cells + 1), FILL_Y(1),
-		    gui.char_width, gui.currFgColor);
+		    gui.char_width, gui.currFgColor,
+		    foptions, pcliprect, unicodepdy);
 	}
 	else
 #endif
@@ -6411,6 +6458,12 @@ gui_mch_draw_string(
 			 foptions, pcliprect, (char *)text, len, padding);
     }
 
+#if defined(FEAT_DIRECTX)
+    if (IS_ENABLE_DIRECTX() &&
+	    (flags & (DRAW_UNDERL | DRAW_STRIKE | DRAW_UNDERC | DRAW_CURSOR)))
+	DWriteContext_Flush(s_dwc);
+#endif
+
     /* Underline */
     if (flags & DRAW_UNDERL)
     {
@@ -6473,6 +6526,11 @@ gui_mch_flush(void)
     BOOL  __stdcall GdiFlush(void);
 #   endif
 
+#if defined(FEAT_DIRECTX)
+    if (IS_ENABLE_DIRECTX())
+	DWriteContext_Flush(s_dwc);
+#endif
+
     GdiFlush();
 }
 
@@ -6481,6 +6539,14 @@ clear_rect(RECT *rcp)
 {
     HBRUSH  hbr;
 
+#if defined(FEAT_DIRECTX)
+    if (IS_ENABLE_DIRECTX())
+    {
+	DWriteContext_FillRect(s_dwc, rcp, gui.back_pixel);
+	return;
+    }
+#endif
+
     hbr = CreateSolidBrush(gui.back_pixel);
     FillRect(s_hdc, rcp, hbr);
     DeleteBrush(hbr);
@@ -8386,6 +8452,11 @@ gui_mch_drawsign(int row, int col, int typenr)
     if (!gui.in_use || (sign = (signicon_t *)sign_get_image(typenr)) == NULL)
 	return;
 
+#if defined(FEAT_DIRECTX)
+    if (IS_ENABLE_DIRECTX())
+	DWriteContext_Flush(s_dwc);
+#endif
+
     x = TEXT_X(col);
     y = TEXT_Y(row);
     w = gui.char_width * 2;
@@ -8865,6 +8936,11 @@ netbeans_draw_multisign_indicator(int row)
     x = 0;
     y = TEXT_Y(row);
 
+#if defined(FEAT_DIRECTX)
+    if (IS_ENABLE_DIRECTX())
+	DWriteContext_Flush(s_dwc);
+#endif
+
     for (i = 0; i < gui.char_height - 3; i++)
 	SetPixel(s_hdc, x+2, y++, gui.currFgColor);
 

src/mbyte.c

@@ -4782,6 +4782,14 @@ iconv_end(void)
 
 #endif /* FEAT_MBYTE */
 
+#ifdef FEAT_GUI
+# define USE_IMACTIVATEFUNC (!gui.in_use && *p_imaf != NUL)
+# define USE_IMSTATUSFUNC (!gui.in_use && *p_imsf != NUL)
+#else
+# define USE_IMACTIVATEFUNC (*p_imaf != NUL)
+# define USE_IMSTATUSFUNC (*p_imsf != NUL)
+#endif
+
 #ifdef FEAT_EVAL
     static void
 call_imactivatefunc(int active)
@@ -5689,7 +5697,7 @@ im_synthesize_keypress(unsigned int keyval, unsigned int state)
 xim_reset(void)
 {
 #ifdef FEAT_EVAL
-    if (p_imaf[0] != NUL)
+    if (USE_IMACTIVATEFUNC)
 	call_imactivatefunc(im_is_active);
     else
 #endif
@@ -5868,7 +5876,7 @@ xim_queue_key_press_event(GdkEventKey *event, int down)
 im_get_status(void)
 {
 #  ifdef FEAT_EVAL
-    if (p_imsf[0] != NUL)
+    if (USE_IMSTATUSFUNC)
 	return call_imstatusfunc();
 #  endif
     return im_is_active;
@@ -5908,21 +5916,19 @@ im_set_active(int active_arg)
     /* If 'imdisable' is set, XIM is never active. */
     if (p_imdisable)
 	active = FALSE;
-#  if !defined(FEAT_GUI_GTK)
     else if (input_style & XIMPreeditPosition)
 	/* There is a problem in switching XIM off when preediting is used,
 	 * and it is not clear how this can be solved.  For now, keep XIM on
 	 * all the time, like it was done in Vim 5.8. */
 	active = TRUE;
-#  endif
 
 #  if defined(FEAT_EVAL)
-    if (p_imaf[0] != NUL)
+    if (USE_IMACTIVATEFUNC)
     {
 	if (active != im_get_status())
 	{
 	    call_imactivatefunc(active);
-	    im_is_active = active;
+	    xim_has_focus = active;
 	}
 	return;
     }
@@ -6328,7 +6334,8 @@ xim_real_init(Window x11_window, Display *x11_display)
     }
     else
     {
-	EMSG(_(e_xim));
+	if (!is_not_a_term())
+	    EMSG(_(e_xim));
 	XCloseIM(xim);
 	return FALSE;
     }
@@ -6348,7 +6355,7 @@ xim_real_init(Window x11_window, Display *x11_display)
 im_get_status(void)
 {
 #  ifdef FEAT_EVAL
-    if (p_imsf[0] != NUL)
+    if (USE_IMSTATUSFUNC)
 	return call_imstatusfunc();
 #  endif
     return xim_has_focus;
@@ -6480,7 +6487,7 @@ static int im_was_set_active = FALSE;
 im_get_status()
 {
 #  ifdef FEAT_EVAL
-    if (p_imsf[0] != NUL)
+    if (USE_IMSTATUSFUNC)
 	return call_imstatusfunc();
 #  endif
     return im_was_set_active;
@@ -6492,7 +6499,7 @@ im_set_active(int active_arg)
 #  if defined(FEAT_MBYTE) && defined(FEAT_EVAL)
     int	    active = !p_imdisable && active_arg;
 
-    if (p_imaf[0] != NUL && active != im_get_status())
+    if (USE_IMACTIVATEFUNC && active != im_get_status())
     {
 	call_imactivatefunc(active);
 	im_was_set_active = active;

src/popupmnu.c

@@ -836,7 +836,7 @@ split_message(char_u *mesg, pumitem_T **array)
 	item->bytelen = p - item->start;
 	if (item->cells > max_cells)
 	    max_cells = item->cells;
-	long_item_count += item->cells / BALLOON_MIN_WIDTH;
+	long_item_count += (item->cells - 1) / BALLOON_MIN_WIDTH;
     }
 
     height = 2 + ga.ga_len;

src/proto/gui_w32.pro

@@ -1,5 +1,4 @@
 /* gui_w32.c */
-int directx_enabled(void);
 int gui_mch_set_rendering_options(char_u *s);
 int gui_mch_is_blinking(void);
 int gui_mch_is_blink_off(void);

src/testdir/test_iminsert.vim

@@ -17,9 +17,6 @@ func IM_statusfunc()
 endfunc
 
 func Test_iminsert2()
-  if has('gui_win32')
-    return
-  endif
   set imactivatefunc=IM_activatefunc
   set imstatusfunc=IM_statusfunc
   set iminsert=2
@@ -27,6 +24,8 @@ func Test_iminsert2()
   set iminsert=0
   set imactivatefunc=
   set imstatusfunc=
-  call assert_equal(1, s:imactivatefunc_called)
-  call assert_equal(1, s:imstatusfunc_called)
+
+  let expected = has('gui_running') ? 0 : 1
+  call assert_equal(expected, s:imactivatefunc_called)
+  call assert_equal(expected, s:imstatusfunc_called)
 endfunc

src/testdir/test_popup.vim

@@ -707,6 +707,10 @@ func Test_balloon_split()
   if !exists('*balloon_split')
     return
   endif
+  call assert_equal([
+        \ 'tempname: 0x555555e380a0 "/home/mool/.viminfz.tmp"',
+        \ ], balloon_split(
+        \ 'tempname: 0x555555e380a0 "/home/mool/.viminfz.tmp"'))
   call assert_equal([
         \ 'one two three four one two three four one two thre',
         \ 'e four',

src/version.c

@@ -771,6 +771,16 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1346,
+/**/
+    1345,
+/**/
+    1344,
+/**/
+    1343,
+/**/
+    1342,
 /**/
     1341,
 /**/