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gui_dwrite.cpp
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/* vi:set ts=8 sts=4 sw=4 noet: */
/*
* Author: MURAOKA Taro <[email protected]>
*
* Contributors:
* - Ken Takata
* - Yasuhiro Matsumoto
*
* Copyright (C) 2013 MURAOKA Taro <[email protected]>
* THIS FILE IS DISTRIBUTED UNDER THE VIM LICENSE.
*/
#define WIN32_LEAN_AND_MEAN
#ifndef DYNAMIC_DIRECTX
# if WINVER < 0x0600
# error WINVER must be 0x0600 or above to use DirectWrite(DirectX)
# endif
#endif
#include <windows.h>
#include <crtdbg.h>
#include <assert.h>
#include <math.h>
#include <d2d1.h>
#include <d2d1helper.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
#ifdef FEAT_DIRECTX_COLOR_EMOJI
# include <dwrite_2.h>
#else
# include <dwrite.h>
#endif
#include "gui_dwrite.h"
#ifdef __MINGW32__
# define __maybenull SAL__maybenull
# define __in SAL__in
# define __out SAL__out
#endif
#if (defined(_MSC_VER) && (_MSC_VER >= 1700)) || (__cplusplus >= 201103L)
# define FINAL final
#else
# define FINAL
#endif
#ifdef DYNAMIC_DIRECTX
extern "C" HINSTANCE vimLoadLib(const char *name);
typedef int (WINAPI *PGETUSERDEFAULTLOCALENAME)(LPWSTR, int);
typedef HRESULT (WINAPI *PD2D1CREATEFACTORY)(D2D1_FACTORY_TYPE,
REFIID, const D2D1_FACTORY_OPTIONS *, void **);
typedef HRESULT (WINAPI *PDWRITECREATEFACTORY)(DWRITE_FACTORY_TYPE,
REFIID, IUnknown **);
static HINSTANCE hD2D1DLL = NULL;
static HINSTANCE hDWriteDLL = NULL;
static PGETUSERDEFAULTLOCALENAME pGetUserDefaultLocaleName = NULL;
static PD2D1CREATEFACTORY pD2D1CreateFactory = NULL;
static PDWRITECREATEFACTORY pDWriteCreateFactory = NULL;
#define GetUserDefaultLocaleName (*pGetUserDefaultLocaleName)
#define D2D1CreateFactory (*pD2D1CreateFactory)
#define DWriteCreateFactory (*pDWriteCreateFactory)
static void
unload(HINSTANCE &hinst)
{
if (hinst != NULL)
{
FreeLibrary(hinst);
hinst = NULL;
}
}
#endif // DYNAMIC_DIRECTX
template <class T> inline void SafeRelease(T **ppT)
{
if (*ppT)
{
(*ppT)->Release();
*ppT = NULL;
}
}
static DWRITE_PIXEL_GEOMETRY
ToPixelGeometry(int value)
{
switch (value)
{
default:
case 0:
return DWRITE_PIXEL_GEOMETRY_FLAT;
case 1:
return DWRITE_PIXEL_GEOMETRY_RGB;
case 2:
return DWRITE_PIXEL_GEOMETRY_BGR;
}
}
static int
ToInt(DWRITE_PIXEL_GEOMETRY value)
{
switch (value)
{
case DWRITE_PIXEL_GEOMETRY_FLAT:
return 0;
case DWRITE_PIXEL_GEOMETRY_RGB:
return 1;
case DWRITE_PIXEL_GEOMETRY_BGR:
return 2;
default:
return -1;
}
}
static DWRITE_RENDERING_MODE
ToRenderingMode(int value)
{
switch (value)
{
default:
case 0:
return DWRITE_RENDERING_MODE_DEFAULT;
case 1:
return DWRITE_RENDERING_MODE_ALIASED;
case 2:
return DWRITE_RENDERING_MODE_CLEARTYPE_GDI_CLASSIC;
case 3:
return DWRITE_RENDERING_MODE_CLEARTYPE_GDI_NATURAL;
case 4:
return DWRITE_RENDERING_MODE_CLEARTYPE_NATURAL;
case 5:
return DWRITE_RENDERING_MODE_CLEARTYPE_NATURAL_SYMMETRIC;
case 6:
return DWRITE_RENDERING_MODE_OUTLINE;
}
}
static D2D1_TEXT_ANTIALIAS_MODE
ToTextAntialiasMode(int value)
{
switch (value)
{
default:
case 0:
return D2D1_TEXT_ANTIALIAS_MODE_DEFAULT;
case 1:
return D2D1_TEXT_ANTIALIAS_MODE_CLEARTYPE;
case 2:
return D2D1_TEXT_ANTIALIAS_MODE_GRAYSCALE;
case 3:
return D2D1_TEXT_ANTIALIAS_MODE_ALIASED;
}
}
static int
ToInt(DWRITE_RENDERING_MODE value)
{
switch (value)
{
case DWRITE_RENDERING_MODE_DEFAULT:
return 0;
case DWRITE_RENDERING_MODE_ALIASED:
return 1;
case DWRITE_RENDERING_MODE_CLEARTYPE_GDI_CLASSIC:
return 2;
case DWRITE_RENDERING_MODE_CLEARTYPE_GDI_NATURAL:
return 3;
case DWRITE_RENDERING_MODE_CLEARTYPE_NATURAL:
return 4;
case DWRITE_RENDERING_MODE_CLEARTYPE_NATURAL_SYMMETRIC:
return 5;
case DWRITE_RENDERING_MODE_OUTLINE:
return 6;
default:
return -1;
}
}
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);
if (item.pTextFormat != NULL)
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;
}
};
enum DrawingMode {
DM_GDI = 0,
DM_DIRECTX = 1,
DM_INTEROP = 2,
};
struct DWriteContext {
HDC mHDC;
RECT mBindRect;
DrawingMode mDMode;
HDC mInteropHDC;
bool mDrawing;
bool mFallbackDC;
ID2D1Factory *mD2D1Factory;
ID2D1DCRenderTarget *mRT;
ID2D1GdiInteropRenderTarget *mGDIRT;
ID2D1SolidColorBrush *mBrush;
ID2D1Bitmap *mBitmap;
IDWriteFactory *mDWriteFactory;
#ifdef FEAT_DIRECTX_COLOR_EMOJI
IDWriteFactory2 *mDWriteFactory2;
#endif
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 CreateDeviceResources();
void DiscardDeviceResources();
HRESULT CreateTextFormatFromLOGFONT(const LOGFONTW &logFont,
IDWriteTextFormat **ppTextFormat);
HRESULT SetFontByLOGFONT(const LOGFONTW &logFont);
void SetFont(HFONT hFont);
void Rebind();
void BindDC(HDC hdc, const RECT *rect);
HRESULT SetDrawingMode(DrawingMode mode);
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(const RECT *rc, COLORREF color);
void DrawLine(int x1, int y1, int x2, int y2, COLORREF color);
void SetPixel(int x, int y, COLORREF color);
void Scroll(int x, int y, const RECT *rc);
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 &accum) :
DWRITE_GLYPH_RUN(*glyphRun),
mAccum(accum),
mDelta(0.0f),
mAdjustedAdvances(new FLOAT[glyphRun->glyphCount])
{
assert(cellWidth != 0.0f);
for (UINT32 i = 0; i < glyphRun->glyphCount; ++i)
{
FLOAT orig = glyphRun->glyphAdvances[i];
FLOAT adjusted = adjustToCell(orig, cellWidth);
mAdjustedAdvances[i] = adjusted;
mDelta += adjusted - orig;
}
glyphAdvances = mAdjustedAdvances;
}
~AdjustedGlyphRun()
{
mAccum += mDelta;
delete[] mAdjustedAdvances;
}
static FLOAT adjustToCell(FLOAT value, FLOAT cellWidth)
{
int cellCount = int(floor(value / cellWidth + 0.5f));
if (cellCount < 1)
cellCount = 1;
return cellCount * cellWidth;
}
};
struct TextRendererContext {
// const fields.
COLORREF color;
FLOAT cellWidth;
// working fields.
FLOAT offsetX;
};
class TextRenderer FINAL : public IDWriteTextRenderer
{
public:
TextRenderer(
DWriteContext* pDWC) :
cRefCount_(0),
pDWC_(pDWC)
{
AddRef();
}
// add "virtual" to avoid a compiler warning
virtual ~TextRenderer()
{
}
IFACEMETHOD(IsPixelSnappingDisabled)(
__maybenull void* clientDrawingContext,
__out BOOL* isDisabled)
{
*isDisabled = FALSE;
return S_OK;
}
IFACEMETHOD(GetCurrentTransform)(
__maybenull void* clientDrawingContext,
__out DWRITE_MATRIX* transform)
{
// forward the render target's transform
pDWC_->mRT->GetTransform(
reinterpret_cast<D2D1_MATRIX_3X2_F*>(transform));
return S_OK;
}
IFACEMETHOD(GetPixelsPerDip)(
__maybenull void* clientDrawingContext,
__out FLOAT* pixelsPerDip)
{
float dpiX, unused;
pDWC_->mRT->GetDpi(&dpiX, &unused);
*pixelsPerDip = dpiX / 96.0f;
return S_OK;
}
IFACEMETHOD(DrawUnderline)(
__maybenull void* clientDrawingContext,
FLOAT baselineOriginX,
FLOAT baselineOriginY,
__in DWRITE_UNDERLINE const* underline,
IUnknown* clientDrawingEffect)
{
return E_NOTIMPL;
}
IFACEMETHOD(DrawStrikethrough)(
__maybenull void* clientDrawingContext,
FLOAT baselineOriginX,
FLOAT baselineOriginY,
__in DWRITE_STRIKETHROUGH const* strikethrough,
IUnknown* clientDrawingEffect)
{
return E_NOTIMPL;
}
IFACEMETHOD(DrawInlineObject)(
__maybenull void* clientDrawingContext,
FLOAT originX,
FLOAT originY,
IDWriteInlineObject* inlineObject,
BOOL isSideways,
BOOL isRightToLeft,
IUnknown* clientDrawingEffect)
{
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);
#ifdef FEAT_DIRECTX_COLOR_EMOJI
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;
}
}
#endif
// 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) ()
{
return InterlockedIncrement(&cRefCount_);
}
IFACEMETHOD_(unsigned long, Release) ()
{
long newCount = InterlockedDecrement(&cRefCount_);
if (newCount == 0)
{
delete this;
return 0;
}
return newCount;
}
IFACEMETHOD(QueryInterface)(
IID const& riid,
void** ppvObject)
{
if (__uuidof(IDWriteTextRenderer) == riid)
{
*ppvObject = this;
}
else if (__uuidof(IDWritePixelSnapping) == riid)
{
*ppvObject = this;
}
else if (__uuidof(IUnknown) == riid)
{
*ppvObject = this;
}
else
{
*ppvObject = NULL;
return E_FAIL;
}
return S_OK;
}
private:
long cRefCount_;
DWriteContext* pDWC_;
};
DWriteContext::DWriteContext() :
mHDC(NULL),
mBindRect(),
mDMode(DM_GDI),
mInteropHDC(NULL),
mDrawing(false),
mFallbackDC(false),
mD2D1Factory(NULL),
mRT(NULL),
mGDIRT(NULL),
mBrush(NULL),
mBitmap(NULL),
mDWriteFactory(NULL),
#ifdef FEAT_DIRECTX_COLOR_EMOJI
mDWriteFactory2(NULL),
#endif
mGdiInterop(NULL),
mRenderingParams(NULL),
mFontCache(8),
mTextFormat(NULL),
mFontWeight(DWRITE_FONT_WEIGHT_NORMAL),
mFontStyle(DWRITE_FONT_STYLE_NORMAL),
mTextAntialiasMode(D2D1_TEXT_ANTIALIAS_MODE_DEFAULT)
{
HRESULT hr;
hr = D2D1CreateFactory(D2D1_FACTORY_TYPE_SINGLE_THREADED,
__uuidof(ID2D1Factory), NULL,
reinterpret_cast<void**>(&mD2D1Factory));
_RPT2(_CRT_WARN, "D2D1CreateFactory: hr=%p p=%p\n", hr, mD2D1Factory);
if (SUCCEEDED(hr))
{
hr = DWriteCreateFactory(
DWRITE_FACTORY_TYPE_SHARED,
__uuidof(IDWriteFactory),
reinterpret_cast<IUnknown**>(&mDWriteFactory));
_RPT2(_CRT_WARN, "DWriteCreateFactory: hr=%p p=%p\n", hr,
mDWriteFactory);
}
#ifdef FEAT_DIRECTX_COLOR_EMOJI
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");
}
#endif
if (SUCCEEDED(hr))
{
hr = mDWriteFactory->GetGdiInterop(&mGdiInterop);
_RPT2(_CRT_WARN, "GetGdiInterop: hr=%p p=%p\n", hr, mGdiInterop);
}
if (SUCCEEDED(hr))
{
hr = mDWriteFactory->CreateRenderingParams(&mRenderingParams);
_RPT2(_CRT_WARN, "CreateRenderingParams: hr=%p p=%p\n", hr,
mRenderingParams);
}
}
DWriteContext::~DWriteContext()
{
SafeRelease(&mTextFormat);
SafeRelease(&mRenderingParams);
SafeRelease(&mGdiInterop);
SafeRelease(&mDWriteFactory);
#ifdef FEAT_DIRECTX_COLOR_EMOJI
SafeRelease(&mDWriteFactory2);
#endif
SafeRelease(&mBitmap);
SafeRelease(&mBrush);
SafeRelease(&mGDIRT);
SafeRelease(&mRT);
SafeRelease(&mD2D1Factory);
}
HRESULT
DWriteContext::CreateDeviceResources()
{
HRESULT hr;
if (mRT != NULL)
return S_OK;
D2D1_RENDER_TARGET_PROPERTIES props = {
D2D1_RENDER_TARGET_TYPE_DEFAULT,
{ DXGI_FORMAT_B8G8R8A8_UNORM, D2D1_ALPHA_MODE_IGNORE },
0, 0,
D2D1_RENDER_TARGET_USAGE_GDI_COMPATIBLE,
D2D1_FEATURE_LEVEL_DEFAULT
};
hr = mD2D1Factory->CreateDCRenderTarget(&props, &mRT);
_RPT2(_CRT_WARN, "CreateDCRenderTarget: hr=%p p=%p\n", hr, mRT);
if (SUCCEEDED(hr))
{
// This always succeeds.
mRT->QueryInterface(
__uuidof(ID2D1GdiInteropRenderTarget),
reinterpret_cast<void**>(&mGDIRT));
_RPT1(_CRT_WARN, "GdiInteropRenderTarget: p=%p\n", mGDIRT);
}
if (SUCCEEDED(hr))
{
hr = mRT->CreateSolidColorBrush(
D2D1::ColorF(D2D1::ColorF::Black),
&mBrush);
_RPT2(_CRT_WARN, "CreateSolidColorBrush: hr=%p p=%p\n", hr, mBrush);
}
if (SUCCEEDED(hr))
Rebind();
return hr;
}
void
DWriteContext::DiscardDeviceResources()
{
SafeRelease(&mBitmap);
SafeRelease(&mBrush);
SafeRelease(&mGDIRT);
SafeRelease(&mRT);
}
HRESULT
DWriteContext::CreateTextFormatFromLOGFONT(const LOGFONTW &logFont,
IDWriteTextFormat **ppTextFormat)
{
// 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))
{
hr = mGdiInterop->CreateFontFromLOGFONT(&logFont, &font);
}
// Get the font family to which this font belongs.
if (SUCCEEDED(hr))
{
hr = font->GetFontFamily(&fontFamily);
}
// Get the family names. This returns an object that encapsulates one or
// more names with the same meaning but in different languages.
if (SUCCEEDED(hr))
{
hr = fontFamily->GetFamilyNames(&localizedFamilyNames);
}
// Get the family name at index zero. If we were going to display the name
// we'd want to try to find one that matched the use locale, but for
// purposes of creating a text format object any language will do.
wchar_t familyName[100];
if (SUCCEEDED(hr))
{
hr = localizedFamilyNames->GetString(0, familyName,
ARRAYSIZE(familyName));
}
if (SUCCEEDED(hr))
{
// Use lfHeight of the LOGFONT as font size.
fontSize = float(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);
// 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;
}
}
// The text format includes a locale name. Ideally, this would be the
// language of the text, which may or may not be the same as the primary
// language of the user. However, for our purposes the user locale will do.
wchar_t localeName[LOCALE_NAME_MAX_LENGTH];
if (SUCCEEDED(hr))
{
if (GetUserDefaultLocaleName(localeName, LOCALE_NAME_MAX_LENGTH) == 0)
hr = HRESULT_FROM_WIN32(GetLastError());
}
if (SUCCEEDED(hr))
{
// Create the text format object.
hr = mDWriteFactory->CreateTextFormat(
familyName,
NULL, // no custom font collection
font->GetWeight(),
font->GetStyle(),
font->GetStretch(),
fontSize,
localeName,
&pTextFormat);
}
if (SUCCEEDED(hr))
hr = pTextFormat->SetTextAlignment(DWRITE_TEXT_ALIGNMENT_LEADING);
if (SUCCEEDED(hr))
hr = pTextFormat->SetParagraphAlignment(
DWRITE_PARAGRAPH_ALIGNMENT_FAR);
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)
{
FontCache::Item item;
if (mFontCache.get(hFont, item))
{
if (item.pTextFormat != NULL)
{
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;
mFallbackDC = false;
}
else
mFallbackDC = true;
mFontCache.put(item);
}
void
DWriteContext::Rebind()
{
SafeRelease(&mBitmap);
mRT->BindDC(mHDC, &mBindRect);
mRT->SetTransform(D2D1::IdentityMatrix());
D2D1_BITMAP_PROPERTIES props = {
{DXGI_FORMAT_B8G8R8A8_UNORM, D2D1_ALPHA_MODE_IGNORE},
96.0f, 96.0f
};
mRT->CreateBitmap(
D2D1::SizeU(mBindRect.right - mBindRect.left,
mBindRect.bottom - mBindRect.top),
props, &mBitmap);
}
void
DWriteContext::BindDC(HDC hdc, const RECT *rect)
{
mHDC = hdc;
mBindRect = *rect;
if (mRT == NULL)
CreateDeviceResources();
else
{
Flush();
Rebind();
}
}
extern "C" void redraw_later_clear(void);
HRESULT
DWriteContext::SetDrawingMode(DrawingMode mode)
{
HRESULT hr = S_OK;
switch (mode)
{
default:
case DM_GDI:
if (mInteropHDC != NULL)
{
mGDIRT->ReleaseDC(NULL);
mInteropHDC = NULL;
}
if (mDrawing)
{
hr = mRT->EndDraw();
if (hr == (HRESULT)D2DERR_RECREATE_TARGET)
{
hr = S_OK;
DiscardDeviceResources();
CreateDeviceResources();
redraw_later_clear();
}
mDrawing = false;
}
break;
case DM_DIRECTX:
if (mInteropHDC != NULL)
{
mGDIRT->ReleaseDC(NULL);
mInteropHDC = NULL;
}
else if (mDrawing == false)
{
CreateDeviceResources();
mRT->BeginDraw();
mDrawing = true;
}
break;
case DM_INTEROP:
if (mDrawing == false)
{
CreateDeviceResources();
mRT->BeginDraw();
mDrawing = true;
}
if (mInteropHDC == NULL)
hr = mGDIRT->GetDC(D2D1_DC_INITIALIZE_MODE_COPY, &mInteropHDC);
break;
}
mDMode = mode;
return hr;
}
ID2D1Brush*
DWriteContext::SolidBrush(COLORREF color)
{
mBrush->SetColor(D2D1::ColorF(UINT32(GetRValue(color)) << 16 |
UINT32(GetGValue(color)) << 8 | UINT32(GetBValue(color))));
return mBrush;
}