-
-
Notifications
You must be signed in to change notification settings - Fork 684
/
gui_dwrite.cpp
1355 lines (1188 loc) · 29.7 KB
/
gui_dwrite.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/* 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
#ifdef __MINGW32__
# define UNUSED __attribute__((unused))
#else
# define UNUSED
#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 UNUSED,
__out BOOL* isDisabled)
{
*isDisabled = FALSE;
return S_OK;
}
IFACEMETHOD(GetCurrentTransform)(
__maybenull void* clientDrawingContext UNUSED,
__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 UNUSED,
__out FLOAT* pixelsPerDip)
{
float dpiX, unused;
pDWC_->mRT->GetDpi(&dpiX, &unused);
*pixelsPerDip = dpiX / 96.0f;
return S_OK;
}
IFACEMETHOD(DrawUnderline)(
__maybenull void* clientDrawingContext UNUSED,
FLOAT baselineOriginX UNUSED,
FLOAT baselineOriginY UNUSED,
__in DWRITE_UNDERLINE const* underline UNUSED,
IUnknown* clientDrawingEffect UNUSED)
{
return E_NOTIMPL;
}
IFACEMETHOD(DrawStrikethrough)(
__maybenull void* clientDrawingContext UNUSED,
FLOAT baselineOriginX UNUSED,
FLOAT baselineOriginY UNUSED,
__in DWRITE_STRIKETHROUGH const* strikethrough UNUSED,
IUnknown* clientDrawingEffect UNUSED)
{
return E_NOTIMPL;
}
IFACEMETHOD(DrawInlineObject)(
__maybenull void* clientDrawingContext UNUSED,
FLOAT originX UNUSED,
FLOAT originY UNUSED,
IDWriteInlineObject* inlineObject UNUSED,
BOOL isSideways UNUSED,
BOOL isRightToLeft UNUSED,
IUnknown* clientDrawingEffect UNUSED)
{
return E_NOTIMPL;
}
IFACEMETHOD(DrawGlyphRun)(
__maybenull void* clientDrawingContext,
FLOAT baselineOriginX,
FLOAT baselineOriginY,
DWRITE_MEASURING_MODE measuringMode UNUSED,
__in DWRITE_GLYPH_RUN const* glyphRun,
__in DWRITE_GLYPH_RUN_DESCRIPTION const* glyphRunDescription UNUSED,
IUnknown* clientDrawingEffect UNUSED)
{
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)