Mercurial > vim
annotate src/gui_dwrite.cpp @ 7601:88c4c634e919
Added tag v7.4.1099 for changeset fa59fafb6a9464b579504aa6c5abe6d5d0382f0d
| author | Christian Brabandt <cb@256bit.org> |
|---|---|
| date | Fri, 15 Jan 2016 22:15:05 +0100 |
| parents | 567e027a3ea1 |
| children | 770774e66011 |
| rev | line source |
|---|---|
| 6110 | 1 /* vi:set ts=8 sts=4 sw=4 noet: */ |
| 2 /* | |
| 3 * Author: MURAOKA Taro <koron.kaoriya@gmail.com> | |
| 4 * | |
| 5 * Contributors: | |
| 6 * - Ken Takata | |
| 7 * | |
| 8 * Copyright (C) 2013 MURAOKA Taro <koron.kaoriya@gmail.com> | |
| 9 * THIS FILE IS DISTRIBUTED UNDER THE VIM LICENSE. | |
| 10 */ | |
| 11 | |
| 12 #define WIN32_LEAN_AND_MEAN | |
| 13 | |
| 14 #ifndef DYNAMIC_DIRECTX | |
| 15 # if WINVER < 0x0600 | |
| 16 # error WINVER must be 0x0600 or above to use DirectWrite(DirectX) | |
| 17 # endif | |
| 18 #endif | |
| 19 | |
| 20 #include <windows.h> | |
| 21 #include <crtdbg.h> | |
| 22 #include <assert.h> | |
| 23 #include <math.h> | |
| 24 #include <d2d1.h> | |
| 25 #include <d2d1helper.h> | |
| 26 #include <dwrite.h> | |
| 27 | |
| 28 #include "gui_dwrite.h" | |
| 29 | |
| 30 #ifdef __MINGW32__ | |
| 31 # define __maybenull SAL__maybenull | |
| 32 # define __in SAL__in | |
| 33 # define __out SAL__out | |
| 34 #endif | |
| 35 | |
| 36 #ifdef DYNAMIC_DIRECTX | |
| 37 extern "C" HINSTANCE vimLoadLib(char *name); | |
| 38 | |
| 39 typedef int (WINAPI *PGETUSERDEFAULTLOCALENAME)(LPWSTR, int); | |
| 40 typedef HRESULT (WINAPI *PD2D1CREATEFACTORY)(D2D1_FACTORY_TYPE, | |
| 41 REFIID, const D2D1_FACTORY_OPTIONS *, void **); | |
| 42 typedef HRESULT (WINAPI *PDWRITECREATEFACTORY)(DWRITE_FACTORY_TYPE, | |
| 43 REFIID, IUnknown **); | |
| 44 | |
| 45 static HINSTANCE hD2D1DLL = NULL; | |
| 46 static HINSTANCE hDWriteDLL = NULL; | |
| 47 | |
| 48 static PGETUSERDEFAULTLOCALENAME pGetUserDefaultLocaleName = NULL; | |
| 49 static PD2D1CREATEFACTORY pD2D1CreateFactory = NULL; | |
| 50 static PDWRITECREATEFACTORY pDWriteCreateFactory = NULL; | |
| 51 | |
| 52 #define GetUserDefaultLocaleName (*pGetUserDefaultLocaleName) | |
| 53 #define D2D1CreateFactory (*pD2D1CreateFactory) | |
| 54 #define DWriteCreateFactory (*pDWriteCreateFactory) | |
| 55 | |
| 56 static void | |
| 57 unload(HINSTANCE &hinst) | |
| 58 { | |
| 59 if (hinst != NULL) | |
| 60 { | |
| 61 FreeLibrary(hinst); | |
| 62 hinst = NULL; | |
| 63 } | |
| 64 } | |
| 65 #endif // DYNAMIC_DIRECTX | |
| 66 | |
| 67 template <class T> inline void SafeRelease(T **ppT) | |
| 68 { | |
| 69 if (*ppT) | |
| 70 { | |
| 71 (*ppT)->Release(); | |
| 72 *ppT = NULL; | |
| 73 } | |
| 74 } | |
| 75 | |
| 76 struct GdiTextRendererContext | |
| 77 { | |
| 78 // const fields. | |
| 79 COLORREF color; | |
| 80 FLOAT cellWidth; | |
| 81 | |
| 82 // working fields. | |
| 83 FLOAT offsetX; | |
| 84 }; | |
| 85 | |
| 86 static DWRITE_PIXEL_GEOMETRY | |
| 87 ToPixelGeometry(int value) | |
| 88 { | |
| 89 switch (value) | |
| 90 { | |
| 91 default: | |
| 92 case 0: | |
| 93 return DWRITE_PIXEL_GEOMETRY_FLAT; | |
| 94 case 1: | |
| 95 return DWRITE_PIXEL_GEOMETRY_RGB; | |
| 96 case 2: | |
| 97 return DWRITE_PIXEL_GEOMETRY_BGR; | |
| 98 } | |
| 99 } | |
| 100 | |
| 101 static int | |
| 102 ToInt(DWRITE_PIXEL_GEOMETRY value) | |
| 103 { | |
| 104 switch (value) | |
| 105 { | |
| 106 case DWRITE_PIXEL_GEOMETRY_FLAT: | |
| 107 return 0; | |
| 108 case DWRITE_PIXEL_GEOMETRY_RGB: | |
| 109 return 1; | |
| 110 case DWRITE_PIXEL_GEOMETRY_BGR: | |
| 111 return 2; | |
| 112 default: | |
| 113 return -1; | |
| 114 } | |
| 115 } | |
| 116 | |
| 117 static DWRITE_RENDERING_MODE | |
| 118 ToRenderingMode(int value) | |
| 119 { | |
| 120 switch (value) | |
| 121 { | |
| 122 default: | |
| 123 case 0: | |
| 124 return DWRITE_RENDERING_MODE_DEFAULT; | |
| 125 case 1: | |
| 126 return DWRITE_RENDERING_MODE_ALIASED; | |
| 127 case 2: | |
| 128 return DWRITE_RENDERING_MODE_CLEARTYPE_GDI_CLASSIC; | |
| 129 case 3: | |
| 130 return DWRITE_RENDERING_MODE_CLEARTYPE_GDI_NATURAL; | |
| 131 case 4: | |
| 132 return DWRITE_RENDERING_MODE_CLEARTYPE_NATURAL; | |
| 133 case 5: | |
| 134 return DWRITE_RENDERING_MODE_CLEARTYPE_NATURAL_SYMMETRIC; | |
| 135 case 6: | |
| 136 return DWRITE_RENDERING_MODE_OUTLINE; | |
| 137 } | |
| 138 } | |
| 139 | |
| 140 static D2D1_TEXT_ANTIALIAS_MODE | |
| 141 ToTextAntialiasMode(int value) | |
| 142 { | |
| 143 switch (value) | |
| 144 { | |
| 145 default: | |
| 146 case 0: | |
| 147 return D2D1_TEXT_ANTIALIAS_MODE_DEFAULT; | |
| 148 case 1: | |
| 149 return D2D1_TEXT_ANTIALIAS_MODE_CLEARTYPE; | |
| 150 case 2: | |
| 151 return D2D1_TEXT_ANTIALIAS_MODE_GRAYSCALE; | |
| 152 case 3: | |
| 153 return D2D1_TEXT_ANTIALIAS_MODE_ALIASED; | |
| 154 } | |
| 155 } | |
| 156 | |
| 157 static int | |
| 158 ToInt(DWRITE_RENDERING_MODE value) | |
| 159 { | |
| 160 switch (value) | |
| 161 { | |
| 162 case DWRITE_RENDERING_MODE_DEFAULT: | |
| 163 return 0; | |
| 164 case DWRITE_RENDERING_MODE_ALIASED: | |
| 165 return 1; | |
| 166 case DWRITE_RENDERING_MODE_CLEARTYPE_GDI_CLASSIC: | |
| 167 return 2; | |
| 168 case DWRITE_RENDERING_MODE_CLEARTYPE_GDI_NATURAL: | |
| 169 return 3; | |
| 170 case DWRITE_RENDERING_MODE_CLEARTYPE_NATURAL: | |
| 171 return 4; | |
| 172 case DWRITE_RENDERING_MODE_CLEARTYPE_NATURAL_SYMMETRIC: | |
| 173 return 5; | |
| 174 case DWRITE_RENDERING_MODE_OUTLINE: | |
| 175 return 6; | |
| 176 default: | |
| 177 return -1; | |
| 178 } | |
| 179 } | |
| 180 | |
| 181 class AdjustedGlyphRun : public DWRITE_GLYPH_RUN | |
| 182 { | |
| 183 private: | |
| 184 FLOAT mDelta; | |
| 185 FLOAT *mAdjustedAdvances; | |
| 186 | |
| 187 public: | |
| 188 AdjustedGlyphRun( | |
| 189 const DWRITE_GLYPH_RUN *glyphRun, | |
| 190 FLOAT cellWidth) : | |
| 191 DWRITE_GLYPH_RUN(*glyphRun), | |
| 192 mDelta(0.0f), | |
| 193 mAdjustedAdvances(new FLOAT[glyphRun->glyphCount]) | |
| 194 { | |
| 195 assert(cellWidth != 0.0f); | |
| 196 for (UINT32 i = 0; i < glyphRun->glyphCount; ++i) | |
| 197 { | |
| 198 FLOAT orig = glyphRun->glyphAdvances[i]; | |
| 199 FLOAT adjusted = adjustToCell(orig, cellWidth); | |
| 200 mAdjustedAdvances[i] = adjusted; | |
| 201 mDelta += adjusted - orig; | |
| 202 } | |
| 203 glyphAdvances = mAdjustedAdvances; | |
| 204 } | |
| 205 | |
| 206 ~AdjustedGlyphRun(void) | |
| 207 { | |
| 208 delete[] mAdjustedAdvances; | |
| 209 } | |
| 210 | |
| 211 FLOAT getDelta(void) const | |
| 212 { | |
| 213 return mDelta; | |
| 214 } | |
| 215 | |
| 216 static FLOAT adjustToCell(FLOAT value, FLOAT cellWidth) | |
| 217 { | |
| 218 int cellCount = (int)floor(value / cellWidth + 0.5f); | |
| 219 if (cellCount < 1) | |
| 220 cellCount = 1; | |
| 221 return cellCount * cellWidth; | |
| 222 } | |
| 223 }; | |
| 224 | |
| 225 class GdiTextRenderer : public IDWriteTextRenderer | |
| 226 { | |
| 227 public: | |
| 228 GdiTextRenderer( | |
| 229 IDWriteBitmapRenderTarget* bitmapRenderTarget, | |
| 230 IDWriteRenderingParams* renderingParams) : | |
| 231 cRefCount_(0), | |
| 232 pRenderTarget_(bitmapRenderTarget), | |
| 233 pRenderingParams_(renderingParams) | |
| 234 { | |
| 235 pRenderTarget_->AddRef(); | |
| 236 pRenderingParams_->AddRef(); | |
| 237 AddRef(); | |
| 238 } | |
| 239 | |
| 240 ~GdiTextRenderer() | |
| 241 { | |
| 242 SafeRelease(&pRenderTarget_); | |
| 243 SafeRelease(&pRenderingParams_); | |
| 244 } | |
| 245 | |
| 246 IFACEMETHOD(IsPixelSnappingDisabled)( | |
| 247 __maybenull void* clientDrawingContext, | |
| 248 __out BOOL* isDisabled) | |
| 249 { | |
| 250 *isDisabled = FALSE; | |
| 251 return S_OK; | |
| 252 } | |
| 253 | |
| 254 IFACEMETHOD(GetCurrentTransform)( | |
| 255 __maybenull void* clientDrawingContext, | |
| 256 __out DWRITE_MATRIX* transform) | |
| 257 { | |
| 258 //forward the render target's transform | |
| 259 pRenderTarget_->GetCurrentTransform(transform); | |
| 260 return S_OK; | |
| 261 } | |
| 262 | |
| 263 IFACEMETHOD(GetPixelsPerDip)( | |
| 264 __maybenull void* clientDrawingContext, | |
| 265 __out FLOAT* pixelsPerDip) | |
| 266 { | |
| 267 *pixelsPerDip = pRenderTarget_->GetPixelsPerDip(); | |
| 268 return S_OK; | |
| 269 } | |
| 270 | |
| 271 IFACEMETHOD(DrawGlyphRun)( | |
| 272 __maybenull void* clientDrawingContext, | |
| 273 FLOAT baselineOriginX, | |
| 274 FLOAT baselineOriginY, | |
| 275 DWRITE_MEASURING_MODE measuringMode, | |
| 276 __in DWRITE_GLYPH_RUN const* glyphRun, | |
| 277 __in DWRITE_GLYPH_RUN_DESCRIPTION const* glyphRunDescription, | |
| 278 IUnknown* clientDrawingEffect) | |
| 279 { | |
| 280 HRESULT hr = S_OK; | |
| 281 | |
| 282 GdiTextRendererContext *context = | |
| 283 reinterpret_cast<GdiTextRendererContext*>(clientDrawingContext); | |
| 284 | |
| 285 AdjustedGlyphRun adjustedGlyphRun(glyphRun, context->cellWidth); | |
| 286 | |
| 287 // Pass on the drawing call to the render target to do the real work. | |
| 288 RECT dirtyRect = {0}; | |
| 289 | |
| 290 hr = pRenderTarget_->DrawGlyphRun( | |
| 291 baselineOriginX + context->offsetX, | |
| 292 baselineOriginY, | |
| 293 measuringMode, | |
| 294 &adjustedGlyphRun, | |
| 295 pRenderingParams_, | |
| 296 context->color, | |
| 297 &dirtyRect); | |
| 298 | |
| 299 context->offsetX += adjustedGlyphRun.getDelta(); | |
| 300 | |
| 301 return hr; | |
| 302 } | |
| 303 | |
| 304 IFACEMETHOD(DrawUnderline)( | |
| 305 __maybenull void* clientDrawingContext, | |
| 306 FLOAT baselineOriginX, | |
| 307 FLOAT baselineOriginY, | |
| 308 __in DWRITE_UNDERLINE const* underline, | |
| 309 IUnknown* clientDrawingEffect) | |
| 310 { | |
| 311 return E_NOTIMPL; | |
| 312 } | |
| 313 | |
| 314 IFACEMETHOD(DrawStrikethrough)( | |
| 315 __maybenull void* clientDrawingContext, | |
| 316 FLOAT baselineOriginX, | |
| 317 FLOAT baselineOriginY, | |
| 318 __in DWRITE_STRIKETHROUGH const* strikethrough, | |
| 319 IUnknown* clientDrawingEffect) | |
| 320 { | |
| 321 return E_NOTIMPL; | |
| 322 } | |
| 323 | |
| 324 IFACEMETHOD(DrawInlineObject)( | |
| 325 __maybenull void* clientDrawingContext, | |
| 326 FLOAT originX, | |
| 327 FLOAT originY, | |
| 328 IDWriteInlineObject* inlineObject, | |
| 329 BOOL isSideways, | |
| 330 BOOL isRightToLeft, | |
| 331 IUnknown* clientDrawingEffect) | |
| 332 { | |
| 333 return E_NOTIMPL; | |
| 334 } | |
| 335 | |
| 336 public: | |
| 337 IFACEMETHOD_(unsigned long, AddRef) () | |
| 338 { | |
| 339 return InterlockedIncrement(&cRefCount_); | |
| 340 } | |
| 341 | |
| 342 IFACEMETHOD_(unsigned long, Release) () | |
| 343 { | |
| 344 long newCount = InterlockedDecrement(&cRefCount_); | |
| 345 | |
| 346 if (newCount == 0) | |
| 347 { | |
| 348 delete this; | |
| 349 return 0; | |
| 350 } | |
| 351 return newCount; | |
| 352 } | |
| 353 | |
| 354 IFACEMETHOD(QueryInterface)( | |
| 355 IID const& riid, | |
| 356 void** ppvObject) | |
| 357 { | |
| 358 if (__uuidof(IDWriteTextRenderer) == riid) | |
| 359 { | |
| 360 *ppvObject = this; | |
| 361 } | |
| 362 else if (__uuidof(IDWritePixelSnapping) == riid) | |
| 363 { | |
| 364 *ppvObject = this; | |
| 365 } | |
| 366 else if (__uuidof(IUnknown) == riid) | |
| 367 { | |
| 368 *ppvObject = this; | |
| 369 } | |
| 370 else | |
| 371 { | |
| 372 *ppvObject = NULL; | |
| 373 return E_FAIL; | |
| 374 } | |
| 375 | |
| 376 return S_OK; | |
| 377 } | |
| 378 | |
| 379 private: | |
| 6120 | 380 long cRefCount_; |
| 6110 | 381 IDWriteBitmapRenderTarget* pRenderTarget_; |
| 382 IDWriteRenderingParams* pRenderingParams_; | |
| 383 }; | |
| 384 | |
| 385 struct DWriteContext { | |
| 386 FLOAT mDpiScaleX; | |
| 387 FLOAT mDpiScaleY; | |
| 388 bool mDrawing; | |
| 389 | |
| 390 ID2D1Factory *mD2D1Factory; | |
| 391 | |
| 392 ID2D1DCRenderTarget *mRT; | |
| 393 ID2D1SolidColorBrush *mBrush; | |
| 394 | |
| 395 IDWriteFactory *mDWriteFactory; | |
| 396 IDWriteGdiInterop *mGdiInterop; | |
| 397 IDWriteRenderingParams *mRenderingParams; | |
| 398 IDWriteTextFormat *mTextFormat; | |
| 399 | |
| 400 HFONT mLastHFont; | |
| 401 DWRITE_FONT_WEIGHT mFontWeight; | |
| 402 DWRITE_FONT_STYLE mFontStyle; | |
| 403 | |
| 404 D2D1_TEXT_ANTIALIAS_MODE mTextAntialiasMode; | |
| 405 | |
| 406 // METHODS | |
| 407 | |
| 408 DWriteContext(); | |
| 409 | |
| 410 virtual ~DWriteContext(); | |
| 411 | |
| 412 HRESULT SetLOGFONT(const LOGFONTW &logFont, float fontSize); | |
| 413 | |
| 414 void SetFont(HFONT hFont); | |
| 415 | |
| 416 void SetFont(const LOGFONTW &logFont); | |
| 417 | |
| 418 void DrawText(HDC hdc, const WCHAR* text, int len, | |
| 419 int x, int y, int w, int h, int cellWidth, COLORREF color); | |
| 420 | |
| 421 float PixelsToDipsX(int x); | |
| 422 | |
| 423 float PixelsToDipsY(int y); | |
| 424 | |
| 425 void SetRenderingParams( | |
| 426 const DWriteRenderingParams *params); | |
| 427 | |
| 428 DWriteRenderingParams *GetRenderingParams( | |
| 429 DWriteRenderingParams *params); | |
| 430 }; | |
| 431 | |
| 432 DWriteContext::DWriteContext() : | |
| 433 mDpiScaleX(1.f), | |
| 434 mDpiScaleY(1.f), | |
| 435 mDrawing(false), | |
| 436 mD2D1Factory(NULL), | |
| 437 mRT(NULL), | |
| 438 mBrush(NULL), | |
| 439 mDWriteFactory(NULL), | |
| 440 mGdiInterop(NULL), | |
| 441 mRenderingParams(NULL), | |
| 442 mTextFormat(NULL), | |
| 443 mLastHFont(NULL), | |
| 444 mFontWeight(DWRITE_FONT_WEIGHT_NORMAL), | |
| 445 mFontStyle(DWRITE_FONT_STYLE_NORMAL), | |
| 446 mTextAntialiasMode(D2D1_TEXT_ANTIALIAS_MODE_DEFAULT) | |
| 447 { | |
| 448 HRESULT hr; | |
| 449 | |
| 450 HDC screen = ::GetDC(0); | |
| 451 mDpiScaleX = ::GetDeviceCaps(screen, LOGPIXELSX) / 96.0f; | |
| 452 mDpiScaleY = ::GetDeviceCaps(screen, LOGPIXELSY) / 96.0f; | |
| 453 ::ReleaseDC(0, screen); | |
| 454 | |
| 455 hr = D2D1CreateFactory(D2D1_FACTORY_TYPE_SINGLE_THREADED, | |
| 456 __uuidof(ID2D1Factory), NULL, | |
| 457 reinterpret_cast<void**>(&mD2D1Factory)); | |
| 458 _RPT2(_CRT_WARN, "D2D1CreateFactory: hr=%p p=%p\n", hr, mD2D1Factory); | |
| 459 | |
| 460 if (SUCCEEDED(hr)) | |
| 461 { | |
| 462 D2D1_RENDER_TARGET_PROPERTIES props = { | |
| 463 D2D1_RENDER_TARGET_TYPE_DEFAULT, | |
| 464 { DXGI_FORMAT_B8G8R8A8_UNORM, D2D1_ALPHA_MODE_IGNORE }, | |
| 465 0, 0, | |
| 466 D2D1_RENDER_TARGET_USAGE_NONE, | |
| 467 D2D1_FEATURE_LEVEL_DEFAULT | |
| 468 }; | |
| 469 hr = mD2D1Factory->CreateDCRenderTarget(&props, &mRT); | |
| 470 _RPT2(_CRT_WARN, "CreateDCRenderTarget: hr=%p p=%p\n", hr, mRT); | |
| 471 } | |
| 472 | |
| 473 if (SUCCEEDED(hr)) | |
| 474 { | |
| 475 hr = mRT->CreateSolidColorBrush( | |
| 476 D2D1::ColorF(D2D1::ColorF::Black), | |
| 477 &mBrush); | |
| 478 _RPT2(_CRT_WARN, "CreateSolidColorBrush: hr=%p p=%p\n", hr, mBrush); | |
| 479 } | |
| 480 | |
| 481 if (SUCCEEDED(hr)) | |
| 482 { | |
| 483 hr = DWriteCreateFactory( | |
| 484 DWRITE_FACTORY_TYPE_SHARED, | |
| 485 __uuidof(IDWriteFactory), | |
| 486 reinterpret_cast<IUnknown**>(&mDWriteFactory)); | |
| 487 _RPT2(_CRT_WARN, "DWriteCreateFactory: hr=%p p=%p\n", hr, | |
| 488 mDWriteFactory); | |
| 489 } | |
| 490 | |
| 491 if (SUCCEEDED(hr)) | |
| 492 { | |
| 493 hr = mDWriteFactory->GetGdiInterop(&mGdiInterop); | |
| 494 _RPT2(_CRT_WARN, "GetGdiInterop: hr=%p p=%p\n", hr, mGdiInterop); | |
| 495 } | |
| 496 | |
| 497 if (SUCCEEDED(hr)) | |
| 498 { | |
| 499 hr = mDWriteFactory->CreateRenderingParams(&mRenderingParams); | |
| 500 _RPT2(_CRT_WARN, "CreateRenderingParams: hr=%p p=%p\n", hr, | |
| 501 mRenderingParams); | |
| 502 } | |
| 503 } | |
| 504 | |
| 505 DWriteContext::~DWriteContext() | |
| 506 { | |
| 507 SafeRelease(&mTextFormat); | |
| 508 SafeRelease(&mRenderingParams); | |
| 509 SafeRelease(&mGdiInterop); | |
| 510 SafeRelease(&mDWriteFactory); | |
| 511 SafeRelease(&mBrush); | |
| 512 SafeRelease(&mRT); | |
| 513 SafeRelease(&mD2D1Factory); | |
| 514 } | |
| 515 | |
| 516 HRESULT | |
| 517 DWriteContext::SetLOGFONT(const LOGFONTW &logFont, float fontSize) | |
| 518 { | |
| 519 // Most of this function is copy from: http://msdn.microsoft.com/en-us/library/windows/desktop/dd941783(v=vs.85).aspx | |
| 520 HRESULT hr = S_OK; | |
| 521 | |
| 522 IDWriteFont *font = NULL; | |
| 523 IDWriteFontFamily *fontFamily = NULL; | |
| 524 IDWriteLocalizedStrings *localizedFamilyNames = NULL; | |
| 525 | |
| 526 if (SUCCEEDED(hr)) | |
| 527 { | |
| 528 hr = mGdiInterop->CreateFontFromLOGFONT(&logFont, &font); | |
| 529 } | |
| 530 | |
| 531 // Get the font family to which this font belongs. | |
| 532 if (SUCCEEDED(hr)) | |
| 533 { | |
| 534 hr = font->GetFontFamily(&fontFamily); | |
| 535 } | |
| 536 | |
| 537 // Get the family names. This returns an object that encapsulates one or | |
| 538 // more names with the same meaning but in different languages. | |
| 539 if (SUCCEEDED(hr)) | |
| 540 { | |
| 541 hr = fontFamily->GetFamilyNames(&localizedFamilyNames); | |
| 542 } | |
| 543 | |
| 544 // Get the family name at index zero. If we were going to display the name | |
| 545 // we'd want to try to find one that matched the use locale, but for | |
| 546 // purposes of creating a text format object any language will do. | |
| 547 | |
| 548 wchar_t familyName[100]; | |
| 549 if (SUCCEEDED(hr)) | |
| 550 { | |
| 551 hr = localizedFamilyNames->GetString(0, familyName, | |
| 552 ARRAYSIZE(familyName)); | |
| 553 } | |
| 554 | |
| 555 if (SUCCEEDED(hr)) | |
| 556 { | |
| 557 // If no font size was passed in use the lfHeight of the LOGFONT. | |
| 558 if (fontSize == 0) | |
| 559 { | |
| 560 // Convert from pixels to DIPs. | |
| 561 fontSize = PixelsToDipsY(logFont.lfHeight); | |
| 562 if (fontSize < 0) | |
| 563 { | |
| 564 // Negative lfHeight represents the size of the em unit. | |
| 565 fontSize = -fontSize; | |
| 566 } | |
| 567 else | |
| 568 { | |
| 569 // Positive lfHeight represents the cell height (ascent + | |
| 570 // descent). | |
| 571 DWRITE_FONT_METRICS fontMetrics; | |
| 572 font->GetMetrics(&fontMetrics); | |
| 573 | |
| 574 // Convert the cell height (ascent + descent) from design units | |
| 575 // to ems. | |
| 576 float cellHeight = static_cast<float>( | |
| 577 fontMetrics.ascent + fontMetrics.descent) | |
| 578 / fontMetrics.designUnitsPerEm; | |
| 579 | |
| 580 // Divide the font size by the cell height to get the font em | |
| 581 // size. | |
| 582 fontSize /= cellHeight; | |
| 583 } | |
| 584 } | |
| 585 } | |
| 586 | |
| 587 // The text format includes a locale name. Ideally, this would be the | |
| 588 // language of the text, which may or may not be the same as the primary | |
| 589 // language of the user. However, for our purposes the user locale will do. | |
| 590 wchar_t localeName[LOCALE_NAME_MAX_LENGTH]; | |
| 591 if (SUCCEEDED(hr)) | |
| 592 { | |
| 593 if (GetUserDefaultLocaleName(localeName, LOCALE_NAME_MAX_LENGTH) == 0) | |
| 594 hr = HRESULT_FROM_WIN32(GetLastError()); | |
| 595 } | |
| 596 | |
| 597 if (SUCCEEDED(hr)) | |
| 598 { | |
| 599 // Create the text format object. | |
| 600 hr = mDWriteFactory->CreateTextFormat( | |
| 601 familyName, | |
| 602 NULL, // no custom font collection | |
| 603 font->GetWeight(), | |
| 604 font->GetStyle(), | |
| 605 font->GetStretch(), | |
| 606 fontSize, | |
| 607 localeName, | |
| 608 &mTextFormat); | |
| 609 } | |
| 610 | |
| 611 if (SUCCEEDED(hr)) | |
| 612 { | |
| 613 mFontWeight = static_cast<DWRITE_FONT_WEIGHT>(logFont.lfWeight); | |
| 614 mFontStyle = logFont.lfItalic ? DWRITE_FONT_STYLE_ITALIC | |
| 615 : DWRITE_FONT_STYLE_NORMAL; | |
| 616 } | |
| 617 | |
| 618 SafeRelease(&localizedFamilyNames); | |
| 619 SafeRelease(&fontFamily); | |
| 620 SafeRelease(&font); | |
| 621 | |
| 622 return hr; | |
| 623 } | |
| 624 | |
| 625 void | |
| 626 DWriteContext::SetFont(HFONT hFont) | |
| 627 { | |
| 628 if (mLastHFont != hFont) | |
| 629 { | |
| 630 LOGFONTW lf; | |
| 631 if (GetObjectW(hFont, sizeof(lf), &lf)) | |
| 632 { | |
| 633 SetFont(lf); | |
| 634 mLastHFont = hFont; | |
| 635 } | |
| 636 } | |
| 637 } | |
| 638 | |
| 639 void | |
| 640 DWriteContext::SetFont(const LOGFONTW &logFont) | |
| 641 { | |
| 642 SafeRelease(&mTextFormat); | |
| 643 mLastHFont = NULL; | |
| 644 | |
| 645 HRESULT hr = SetLOGFONT(logFont, 0.f); | |
| 646 | |
| 647 if (SUCCEEDED(hr)) | |
| 648 hr = mTextFormat->SetTextAlignment(DWRITE_TEXT_ALIGNMENT_LEADING); | |
| 649 | |
| 650 if (SUCCEEDED(hr)) | |
| 651 hr = mTextFormat->SetParagraphAlignment( | |
| 652 DWRITE_PARAGRAPH_ALIGNMENT_CENTER); | |
| 653 | |
| 654 if (SUCCEEDED(hr)) | |
| 655 hr = mTextFormat->SetWordWrapping(DWRITE_WORD_WRAPPING_NO_WRAP); | |
| 656 } | |
| 657 | |
| 658 void | |
| 659 DWriteContext::DrawText(HDC hdc, const WCHAR* text, int len, | |
| 660 int x, int y, int w, int h, int cellWidth, COLORREF color) | |
| 661 { | |
| 662 HRESULT hr = S_OK; | |
| 663 IDWriteBitmapRenderTarget *bmpRT = NULL; | |
| 664 | |
| 665 // Skip when any fonts are not set. | |
| 666 if (mTextFormat == NULL) | |
| 667 return; | |
| 668 | |
| 669 // Check possibility of zero divided error. | |
| 670 if (cellWidth == 0 || mDpiScaleX == 0.0f || mDpiScaleY == 0.0f) | |
| 671 return; | |
| 672 | |
| 673 if (SUCCEEDED(hr)) | |
| 674 hr = mGdiInterop->CreateBitmapRenderTarget(hdc, w, h, &bmpRT); | |
| 675 | |
| 676 if (SUCCEEDED(hr)) | |
| 677 { | |
| 678 IDWriteTextLayout *textLayout = NULL; | |
| 679 | |
| 680 HDC memdc = bmpRT->GetMemoryDC(); | |
| 681 BitBlt(memdc, 0, 0, w, h, hdc, x, y, SRCCOPY); | |
| 682 | |
| 683 hr = mDWriteFactory->CreateGdiCompatibleTextLayout( | |
| 684 text, len, mTextFormat, PixelsToDipsX(w), | |
| 685 PixelsToDipsY(h), mDpiScaleX, NULL, TRUE, &textLayout); | |
| 686 | |
| 687 if (SUCCEEDED(hr)) | |
| 688 { | |
|
7547
567e027a3ea1
commit https://github.com/vim/vim/commit/5fa4d448fb717874b6619bcda62e42190702997c
Christian Brabandt <cb@256bit.org>
parents:
6120
diff
changeset
|
689 DWRITE_TEXT_RANGE textRange = { 0, (UINT32)len }; |
| 6110 | 690 textLayout->SetFontWeight(mFontWeight, textRange); |
| 691 textLayout->SetFontStyle(mFontStyle, textRange); | |
| 692 } | |
| 693 | |
| 694 if (SUCCEEDED(hr)) | |
| 695 { | |
| 696 GdiTextRenderer *renderer = new GdiTextRenderer(bmpRT, | |
| 697 mRenderingParams); | |
| 698 GdiTextRendererContext data = { | |
| 699 color, | |
| 700 PixelsToDipsX(cellWidth), | |
| 701 0.0f | |
| 702 }; | |
| 703 textLayout->Draw(&data, renderer, 0, 0); | |
| 704 SafeRelease(&renderer); | |
| 705 } | |
| 706 | |
| 707 BitBlt(hdc, x, y, w, h, memdc, 0, 0, SRCCOPY); | |
| 708 | |
| 709 SafeRelease(&textLayout); | |
| 710 } | |
| 711 | |
| 712 SafeRelease(&bmpRT); | |
| 713 } | |
| 714 | |
| 715 float | |
| 716 DWriteContext::PixelsToDipsX(int x) | |
| 717 { | |
| 718 return x / mDpiScaleX; | |
| 719 } | |
| 720 | |
| 721 float | |
| 722 DWriteContext::PixelsToDipsY(int y) | |
| 723 { | |
| 724 return y / mDpiScaleY; | |
| 725 } | |
| 726 | |
| 727 void | |
| 728 DWriteContext::SetRenderingParams( | |
| 729 const DWriteRenderingParams *params) | |
| 730 { | |
| 731 if (mDWriteFactory == NULL) | |
| 732 return; | |
| 733 | |
| 734 IDWriteRenderingParams *renderingParams = NULL; | |
| 735 D2D1_TEXT_ANTIALIAS_MODE textAntialiasMode = | |
| 736 D2D1_TEXT_ANTIALIAS_MODE_DEFAULT; | |
| 737 HRESULT hr; | |
| 738 if (params != NULL) | |
| 739 { | |
| 740 hr = mDWriteFactory->CreateCustomRenderingParams(params->gamma, | |
| 741 params->enhancedContrast, params->clearTypeLevel, | |
| 742 ToPixelGeometry(params->pixelGeometry), | |
| 743 ToRenderingMode(params->renderingMode), &renderingParams); | |
| 744 textAntialiasMode = ToTextAntialiasMode(params->textAntialiasMode); | |
| 745 } | |
| 746 else | |
| 747 hr = mDWriteFactory->CreateRenderingParams(&renderingParams); | |
| 748 if (SUCCEEDED(hr) && renderingParams != NULL) | |
| 749 { | |
| 750 SafeRelease(&mRenderingParams); | |
| 751 mRenderingParams = renderingParams; | |
| 752 mTextAntialiasMode = textAntialiasMode; | |
| 753 } | |
| 754 } | |
| 755 | |
| 756 DWriteRenderingParams * | |
| 757 DWriteContext::GetRenderingParams( | |
| 758 DWriteRenderingParams *params) | |
| 759 { | |
| 760 if (params != NULL && mRenderingParams != NULL) | |
| 761 { | |
| 762 params->gamma = mRenderingParams->GetGamma(); | |
| 763 params->enhancedContrast = mRenderingParams->GetEnhancedContrast(); | |
| 764 params->clearTypeLevel = mRenderingParams->GetClearTypeLevel(); | |
| 765 params->pixelGeometry = ToInt(mRenderingParams->GetPixelGeometry()); | |
| 766 params->renderingMode = ToInt(mRenderingParams->GetRenderingMode()); | |
| 767 params->textAntialiasMode = mTextAntialiasMode; | |
| 768 } | |
| 769 return params; | |
| 770 } | |
| 771 | |
| 772 //////////////////////////////////////////////////////////////////////////// | |
| 773 // PUBLIC C INTERFACES | |
| 774 | |
| 775 void | |
| 776 DWrite_Init(void) | |
| 777 { | |
| 778 #ifdef DYNAMIC_DIRECTX | |
| 779 // Load libraries. | |
| 780 hD2D1DLL = vimLoadLib(const_cast<char*>("d2d1.dll")); | |
| 781 hDWriteDLL = vimLoadLib(const_cast<char*>("dwrite.dll")); | |
| 782 if (hD2D1DLL == NULL || hDWriteDLL == NULL) | |
| 783 { | |
| 784 DWrite_Final(); | |
| 785 return; | |
| 786 } | |
| 787 // Get address of procedures. | |
| 788 pGetUserDefaultLocaleName = (PGETUSERDEFAULTLOCALENAME)GetProcAddress( | |
| 789 GetModuleHandle("kernel32.dll"), "GetUserDefaultLocaleName"); | |
| 790 pD2D1CreateFactory = (PD2D1CREATEFACTORY)GetProcAddress(hD2D1DLL, | |
| 791 "D2D1CreateFactory"); | |
| 792 pDWriteCreateFactory = (PDWRITECREATEFACTORY)GetProcAddress(hDWriteDLL, | |
| 793 "DWriteCreateFactory"); | |
| 794 #endif | |
| 795 } | |
| 796 | |
| 797 void | |
| 798 DWrite_Final(void) | |
| 799 { | |
| 800 #ifdef DYNAMIC_DIRECTX | |
| 801 pGetUserDefaultLocaleName = NULL; | |
| 802 pD2D1CreateFactory = NULL; | |
| 803 pDWriteCreateFactory = NULL; | |
| 804 unload(hDWriteDLL); | |
| 805 unload(hD2D1DLL); | |
| 806 #endif | |
| 807 } | |
| 808 | |
| 809 DWriteContext * | |
| 810 DWriteContext_Open(void) | |
| 811 { | |
| 812 #ifdef DYNAMIC_DIRECTX | |
| 813 if (pGetUserDefaultLocaleName == NULL || pD2D1CreateFactory == NULL | |
| 814 || pDWriteCreateFactory == NULL) | |
| 815 return NULL; | |
| 816 #endif | |
| 817 return new DWriteContext(); | |
| 818 } | |
| 819 | |
| 820 void | |
| 821 DWriteContext_BeginDraw(DWriteContext *ctx) | |
| 822 { | |
| 823 if (ctx != NULL && ctx->mRT != NULL) | |
| 824 { | |
| 825 ctx->mRT->BeginDraw(); | |
| 826 ctx->mRT->SetTransform(D2D1::IdentityMatrix()); | |
| 827 ctx->mDrawing = true; | |
| 828 } | |
| 829 } | |
| 830 | |
| 831 void | |
| 832 DWriteContext_BindDC(DWriteContext *ctx, HDC hdc, RECT *rect) | |
| 833 { | |
| 834 if (ctx != NULL && ctx->mRT != NULL) | |
| 835 { | |
| 836 ctx->mRT->BindDC(hdc, rect); | |
| 837 ctx->mRT->SetTextAntialiasMode(ctx->mTextAntialiasMode); | |
| 838 } | |
| 839 } | |
| 840 | |
| 841 void | |
| 842 DWriteContext_SetFont(DWriteContext *ctx, HFONT hFont) | |
| 843 { | |
| 844 if (ctx != NULL) | |
| 845 { | |
| 846 ctx->SetFont(hFont); | |
| 847 } | |
| 848 } | |
| 849 | |
| 850 void | |
| 851 DWriteContext_DrawText( | |
| 852 DWriteContext *ctx, | |
| 853 HDC hdc, | |
| 854 const WCHAR* text, | |
| 855 int len, | |
| 856 int x, | |
| 857 int y, | |
| 858 int w, | |
| 859 int h, | |
| 860 int cellWidth, | |
| 861 COLORREF color) | |
| 862 { | |
| 863 if (ctx != NULL) | |
| 864 ctx->DrawText(hdc, text, len, x, y, w, h, cellWidth, color); | |
| 865 } | |
| 866 | |
| 867 void | |
| 868 DWriteContext_EndDraw(DWriteContext *ctx) | |
| 869 { | |
| 870 if (ctx != NULL && ctx->mRT != NULL) | |
| 871 { | |
| 872 ctx->mRT->EndDraw(); | |
| 873 ctx->mDrawing = false; | |
| 874 } | |
| 875 } | |
| 876 | |
| 877 void | |
| 878 DWriteContext_Close(DWriteContext *ctx) | |
| 879 { | |
| 880 delete ctx; | |
| 881 } | |
| 882 | |
| 883 void | |
| 884 DWriteContext_SetRenderingParams( | |
| 885 DWriteContext *ctx, | |
| 886 const DWriteRenderingParams *params) | |
| 887 { | |
| 888 if (ctx != NULL) | |
| 889 ctx->SetRenderingParams(params); | |
| 890 } | |
| 891 | |
| 892 DWriteRenderingParams * | |
| 893 DWriteContext_GetRenderingParams( | |
| 894 DWriteContext *ctx, | |
| 895 DWriteRenderingParams *params) | |
| 896 { | |
| 897 if (ctx != NULL) | |
| 898 return ctx->GetRenderingParams(params); | |
| 899 else | |
| 900 return NULL; | |
| 901 } |