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908 lines (786 loc) · 20.2 KB
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/* vi:set ts=8 sts=4 sw=4 noet: */
/*
* Author: MURAOKA Taro <koron.kaoriya@gmail.com>
*
* Contributors:
* - Ken Takata
*
* Copyright (C) 2013 MURAOKA Taro <koron.kaoriya@gmail.com>
* 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>
#include <dwrite.h>
#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(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;
}
}
struct GdiTextRendererContext
{
// const fields.
COLORREF color;
FLOAT cellWidth;
// working fields.
FLOAT offsetX;
};
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 AdjustedGlyphRun : public DWRITE_GLYPH_RUN
{
private:
FLOAT mDelta;
FLOAT *mAdjustedAdvances;
public:
AdjustedGlyphRun(
const DWRITE_GLYPH_RUN *glyphRun,
FLOAT cellWidth) :
DWRITE_GLYPH_RUN(*glyphRun),
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(void)
{
delete[] mAdjustedAdvances;
}
FLOAT getDelta(void) const
{
return mDelta;
}
static FLOAT adjustToCell(FLOAT value, FLOAT cellWidth)
{
int cellCount = (int)floor(value / cellWidth + 0.5f);
if (cellCount < 1)
cellCount = 1;
return cellCount * cellWidth;
}
};
class GdiTextRenderer FINAL : public IDWriteTextRenderer
{
public:
GdiTextRenderer(
IDWriteBitmapRenderTarget* bitmapRenderTarget,
IDWriteRenderingParams* renderingParams) :
cRefCount_(0),
pRenderTarget_(bitmapRenderTarget),
pRenderingParams_(renderingParams)
{
pRenderTarget_->AddRef();
pRenderingParams_->AddRef();
AddRef();
}
// add "virtual" to avoid a compiler warning
virtual ~GdiTextRenderer()
{
SafeRelease(&pRenderTarget_);
SafeRelease(&pRenderingParams_);
}
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
pRenderTarget_->GetCurrentTransform(transform);
return S_OK;
}
IFACEMETHOD(GetPixelsPerDip)(
__maybenull void* clientDrawingContext,
__out FLOAT* pixelsPerDip)
{
*pixelsPerDip = pRenderTarget_->GetPixelsPerDip();
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,
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;
}
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_;
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::DWriteContext() :
mDpiScaleX(1.f),
mDpiScaleY(1.f),
mDrawing(false),
mD2D1Factory(NULL),
mRT(NULL),
mBrush(NULL),
mDWriteFactory(NULL),
mGdiInterop(NULL),
mRenderingParams(NULL),
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));
_RPT2(_CRT_WARN, "D2D1CreateFactory: hr=%p p=%p\n", hr, mD2D1Factory);
if (SUCCEEDED(hr))
{
D2D1_RENDER_TARGET_PROPERTIES props = {
D2D1_RENDER_TARGET_TYPE_DEFAULT,
{ DXGI_FORMAT_B8G8R8A8_UNORM, D2D1_ALPHA_MODE_IGNORE },
0, 0,
D2D1_RENDER_TARGET_USAGE_NONE,
D2D1_FEATURE_LEVEL_DEFAULT
};
hr = mD2D1Factory->CreateDCRenderTarget(&props, &mRT);
_RPT2(_CRT_WARN, "CreateDCRenderTarget: hr=%p p=%p\n", hr, mRT);
}
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))
{
hr = DWriteCreateFactory(
DWRITE_FACTORY_TYPE_SHARED,
__uuidof(IDWriteFactory),
reinterpret_cast<IUnknown**>(&mDWriteFactory));
_RPT2(_CRT_WARN, "DWriteCreateFactory: hr=%p p=%p\n", hr,
mDWriteFactory);
}
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);
SafeRelease(&mBrush);
SafeRelease(&mRT);
SafeRelease(&mD2D1Factory);
}
HRESULT
DWriteContext::SetLOGFONT(const LOGFONTW &logFont, float fontSize)
{
// Most of this function is copy from: http://msdn.microsoft.com/en-us/library/windows/desktop/dd941783(v=vs.85).aspx
HRESULT hr = S_OK;
IDWriteFont *font = NULL;
IDWriteFontFamily *fontFamily = NULL;
IDWriteLocalizedStrings *localizedFamilyNames = NULL;
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))
{
// If no font size was passed in use the lfHeight of the LOGFONT.
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);
// 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,
&mTextFormat);
}
if (SUCCEEDED(hr))
{
mFontWeight = static_cast<DWRITE_FONT_WEIGHT>(logFont.lfWeight);
mFontStyle = logFont.lfItalic ? DWRITE_FONT_STYLE_ITALIC
: DWRITE_FONT_STYLE_NORMAL;
}
SafeRelease(&localizedFamilyNames);
SafeRelease(&fontFamily);
SafeRelease(&font);
return hr;
}
void
DWriteContext::SetFont(HFONT hFont)
{
if (mLastHFont != hFont)
{
LOGFONTW lf;
if (GetObjectW(hFont, sizeof(lf), &lf))
{
SetFont(lf);
mLastHFont = hFont;
}
}
}
void
DWriteContext::SetFont(const LOGFONTW &logFont)
{
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);
}
void
DWriteContext::DrawText(HDC hdc, const WCHAR* text, int len,
int x, int y, int w, int h, int cellWidth, COLORREF color)
{
HRESULT hr = S_OK;
IDWriteBitmapRenderTarget *bmpRT = NULL;
// Skip when any fonts are not set.
if (mTextFormat == NULL)
return;
// Check possibility of zero divided error.
if (cellWidth == 0 || mDpiScaleX == 0.0f || mDpiScaleY == 0.0f)
return;
if (SUCCEEDED(hr))
hr = mGdiInterop->CreateBitmapRenderTarget(hdc, w, h, &bmpRT);
if (SUCCEEDED(hr))
{
IDWriteTextLayout *textLayout = NULL;
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);
}
SafeRelease(&bmpRT);
}
float
DWriteContext::PixelsToDipsX(int x)
{
return x / mDpiScaleX;
}
float
DWriteContext::PixelsToDipsY(int y)
{
return y / mDpiScaleY;
}
void
DWriteContext::SetRenderingParams(
const DWriteRenderingParams *params)
{
if (mDWriteFactory == NULL)
return;
IDWriteRenderingParams *renderingParams = NULL;
D2D1_TEXT_ANTIALIAS_MODE textAntialiasMode =
D2D1_TEXT_ANTIALIAS_MODE_DEFAULT;
HRESULT hr;
if (params != NULL)
{
hr = mDWriteFactory->CreateCustomRenderingParams(params->gamma,
params->enhancedContrast, params->clearTypeLevel,
ToPixelGeometry(params->pixelGeometry),
ToRenderingMode(params->renderingMode), &renderingParams);
textAntialiasMode = ToTextAntialiasMode(params->textAntialiasMode);
}
else
hr = mDWriteFactory->CreateRenderingParams(&renderingParams);
if (SUCCEEDED(hr) && renderingParams != NULL)
{
SafeRelease(&mRenderingParams);
mRenderingParams = renderingParams;
mTextAntialiasMode = textAntialiasMode;
}
}
DWriteRenderingParams *
DWriteContext::GetRenderingParams(
DWriteRenderingParams *params)
{
if (params != NULL && mRenderingParams != NULL)
{
params->gamma = mRenderingParams->GetGamma();
params->enhancedContrast = mRenderingParams->GetEnhancedContrast();
params->clearTypeLevel = mRenderingParams->GetClearTypeLevel();
params->pixelGeometry = ToInt(mRenderingParams->GetPixelGeometry());
params->renderingMode = ToInt(mRenderingParams->GetRenderingMode());
params->textAntialiasMode = mTextAntialiasMode;
}
return params;
}
////////////////////////////////////////////////////////////////////////////
// PUBLIC C INTERFACES
void
DWrite_Init(void)
{
#ifdef DYNAMIC_DIRECTX
// Load libraries.
hD2D1DLL = vimLoadLib(const_cast<char*>("d2d1.dll"));
hDWriteDLL = vimLoadLib(const_cast<char*>("dwrite.dll"));
if (hD2D1DLL == NULL || hDWriteDLL == NULL)
{
DWrite_Final();
return;
}
// Get address of procedures.
pGetUserDefaultLocaleName = (PGETUSERDEFAULTLOCALENAME)GetProcAddress(
GetModuleHandle("kernel32.dll"), "GetUserDefaultLocaleName");
pD2D1CreateFactory = (PD2D1CREATEFACTORY)GetProcAddress(hD2D1DLL,
"D2D1CreateFactory");
pDWriteCreateFactory = (PDWRITECREATEFACTORY)GetProcAddress(hDWriteDLL,
"DWriteCreateFactory");
#endif
}
void
DWrite_Final(void)
{
#ifdef DYNAMIC_DIRECTX
pGetUserDefaultLocaleName = NULL;
pD2D1CreateFactory = NULL;
pDWriteCreateFactory = NULL;
unload(hDWriteDLL);
unload(hD2D1DLL);
#endif
}
DWriteContext *
DWriteContext_Open(void)
{
#ifdef DYNAMIC_DIRECTX
if (pGetUserDefaultLocaleName == NULL || pD2D1CreateFactory == NULL
|| pDWriteCreateFactory == NULL)
return NULL;
#endif
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);
}
}
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,
int y,
int w,
int h,
int cellWidth,
COLORREF color)
{
if (ctx != NULL)
ctx->DrawText(hdc, text, len, x, y, w, h, cellWidth, color);
}
void
DWriteContext_EndDraw(DWriteContext *ctx)
{
if (ctx != NULL && ctx->mRT != NULL)
{
ctx->mRT->EndDraw();
ctx->mDrawing = false;
}
}
void
DWriteContext_Close(DWriteContext *ctx)
{
delete ctx;
}
void
DWriteContext_SetRenderingParams(
DWriteContext *ctx,
const DWriteRenderingParams *params)
{
if (ctx != NULL)
ctx->SetRenderingParams(params);
}
DWriteRenderingParams *
DWriteContext_GetRenderingParams(
DWriteContext *ctx,
DWriteRenderingParams *params)
{
if (ctx != NULL)
return ctx->GetRenderingParams(params);
else
return NULL;
}