forked from ocornut/imgui
-
Notifications
You must be signed in to change notification settings - Fork 0
/
imgui_draw.cpp
2392 lines (2135 loc) · 106 KB
/
imgui_draw.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
// dear imgui, v1.50 WIP
// (drawing and font code)
// Contains implementation for
// - ImDrawList
// - ImDrawData
// - ImFontAtlas
// - ImFont
// - Default font data
#if defined(_MSC_VER) && !defined(_CRT_SECURE_NO_WARNINGS)
#define _CRT_SECURE_NO_WARNINGS
#endif
#include "imgui.h"
#define IMGUI_DEFINE_MATH_OPERATORS
#define IMGUI_DEFINE_PLACEMENT_NEW
#include "imgui_internal.h"
#include <stdio.h> // vsnprintf, sscanf, printf
#if !defined(alloca)
#ifdef _WIN32
#include <malloc.h> // alloca
#elif (defined(__FreeBSD__) || defined(FreeBSD_kernel) || defined(__DragonFly__)) && !defined(__GLIBC__)
#include <stdlib.h> // alloca. FreeBSD uses stdlib.h unless GLIBC
#else
#include <alloca.h> // alloca
#endif
#endif
#ifdef _MSC_VER
#pragma warning (disable: 4505) // unreferenced local function has been removed (stb stuff)
#pragma warning (disable: 4996) // 'This function or variable may be unsafe': strcpy, strdup, sprintf, vsnprintf, sscanf, fopen
#define snprintf _snprintf
#endif
#ifdef __clang__
#pragma clang diagnostic ignored "-Wold-style-cast" // warning : use of old-style cast // yes, they are more terse.
#pragma clang diagnostic ignored "-Wfloat-equal" // warning : comparing floating point with == or != is unsafe // storing and comparing against same constants ok.
#pragma clang diagnostic ignored "-Wglobal-constructors" // warning : declaration requires a global destructor // similar to above, not sure what the exact difference it.
#pragma clang diagnostic ignored "-Wsign-conversion" // warning : implicit conversion changes signedness //
#if __has_warning("-Wreserved-id-macro")
#pragma clang diagnostic ignored "-Wreserved-id-macro" // warning : macro name is a reserved identifier //
#endif
#elif defined(__GNUC__)
#pragma GCC diagnostic ignored "-Wunused-function" // warning: 'xxxx' defined but not used
#pragma GCC diagnostic ignored "-Wdouble-promotion" // warning: implicit conversion from 'float' to 'double' when passing argument to function
#pragma GCC diagnostic ignored "-Wconversion" // warning: conversion to 'xxxx' from 'xxxx' may alter its value
#endif
//-------------------------------------------------------------------------
// STB libraries implementation
//-------------------------------------------------------------------------
//#define IMGUI_STB_NAMESPACE ImGuiStb
//#define IMGUI_DISABLE_STB_RECT_PACK_IMPLEMENTATION
//#define IMGUI_DISABLE_STB_TRUETYPE_IMPLEMENTATION
#ifdef IMGUI_STB_NAMESPACE
namespace IMGUI_STB_NAMESPACE
{
#endif
#ifdef _MSC_VER
#pragma warning (push)
#pragma warning (disable: 4456) // declaration of 'xx' hides previous local declaration
#endif
#ifdef __clang__
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wold-style-cast" // warning : use of old-style cast // yes, they are more terse.
#pragma clang diagnostic ignored "-Wunused-function"
#pragma clang diagnostic ignored "-Wmissing-prototypes"
#endif
#ifdef __GNUC__
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wtype-limits" // warning: comparison is always true due to limited range of data type [-Wtype-limits]
#endif
#define STBRP_ASSERT(x) IM_ASSERT(x)
#ifndef IMGUI_DISABLE_STB_RECT_PACK_IMPLEMENTATION
#define STBRP_STATIC
#define STB_RECT_PACK_IMPLEMENTATION
#endif
#include "stb_rect_pack.h"
#define STBTT_malloc(x,u) ((void)(u), ImGui::MemAlloc(x))
#define STBTT_free(x,u) ((void)(u), ImGui::MemFree(x))
#define STBTT_assert(x) IM_ASSERT(x)
#ifndef IMGUI_DISABLE_STB_TRUETYPE_IMPLEMENTATION
#define STBTT_STATIC
#define STB_TRUETYPE_IMPLEMENTATION
#else
#define STBTT_DEF extern
#endif
#include "stb_truetype.h"
#ifdef __GNUC__
#pragma GCC diagnostic pop
#endif
#ifdef __clang__
#pragma clang diagnostic pop
#endif
#ifdef _MSC_VER
#pragma warning (pop)
#endif
#ifdef IMGUI_STB_NAMESPACE
} // namespace ImGuiStb
using namespace IMGUI_STB_NAMESPACE;
#endif
//-----------------------------------------------------------------------------
// ImDrawList
//-----------------------------------------------------------------------------
static const ImVec4 GNullClipRect(-8192.0f, -8192.0f, +8192.0f, +8192.0f); // Large values that are easy to encode in a few bits+shift
void ImDrawList::Clear()
{
CmdBuffer.resize(0);
IdxBuffer.resize(0);
VtxBuffer.resize(0);
_VtxCurrentIdx = 0;
_VtxWritePtr = NULL;
_IdxWritePtr = NULL;
_ClipRectStack.resize(0);
_TextureIdStack.resize(0);
_Path.resize(0);
_ChannelsCurrent = 0;
_ChannelsCount = 1;
// NB: Do not clear channels so our allocations are re-used after the first frame.
}
void ImDrawList::ClearFreeMemory()
{
CmdBuffer.clear();
IdxBuffer.clear();
VtxBuffer.clear();
_VtxCurrentIdx = 0;
_VtxWritePtr = NULL;
_IdxWritePtr = NULL;
_ClipRectStack.clear();
_TextureIdStack.clear();
_Path.clear();
_ChannelsCurrent = 0;
_ChannelsCount = 1;
for (int i = 0; i < _Channels.Size; i++)
{
if (i == 0) memset(&_Channels[0], 0, sizeof(_Channels[0])); // channel 0 is a copy of CmdBuffer/IdxBuffer, don't destruct again
_Channels[i].CmdBuffer.clear();
_Channels[i].IdxBuffer.clear();
}
_Channels.clear();
}
// Use macros because C++ is a terrible language, we want guaranteed inline, no code in header, and no overhead in Debug mode
#define GetCurrentClipRect() (_ClipRectStack.Size ? _ClipRectStack.Data[_ClipRectStack.Size-1] : GNullClipRect)
#define GetCurrentTextureId() (_TextureIdStack.Size ? _TextureIdStack.Data[_TextureIdStack.Size-1] : NULL)
void ImDrawList::AddDrawCmd()
{
ImDrawCmd draw_cmd;
draw_cmd.ClipRect = GetCurrentClipRect();
draw_cmd.TextureId = GetCurrentTextureId();
IM_ASSERT(draw_cmd.ClipRect.x <= draw_cmd.ClipRect.z && draw_cmd.ClipRect.y <= draw_cmd.ClipRect.w);
CmdBuffer.push_back(draw_cmd);
}
void ImDrawList::AddCallback(ImDrawCallback callback, void* callback_data)
{
ImDrawCmd* current_cmd = CmdBuffer.Size ? &CmdBuffer.back() : NULL;
if (!current_cmd || current_cmd->ElemCount != 0 || current_cmd->UserCallback != NULL)
{
AddDrawCmd();
current_cmd = &CmdBuffer.back();
}
current_cmd->UserCallback = callback;
current_cmd->UserCallbackData = callback_data;
AddDrawCmd(); // Force a new command after us (see comment below)
}
// Our scheme may appears a bit unusual, basically we want the most-common calls AddLine AddRect etc. to not have to perform any check so we always have a command ready in the stack.
// The cost of figuring out if a new command has to be added or if we can merge is paid in those Update** functions only.
void ImDrawList::UpdateClipRect()
{
// If current command is used with different settings we need to add a new command
const ImVec4 curr_clip_rect = GetCurrentClipRect();
ImDrawCmd* curr_cmd = CmdBuffer.Size > 0 ? &CmdBuffer.Data[CmdBuffer.Size-1] : NULL;
if (!curr_cmd || (curr_cmd->ElemCount != 0 && memcmp(&curr_cmd->ClipRect, &curr_clip_rect, sizeof(ImVec4)) != 0) || curr_cmd->UserCallback != NULL)
{
AddDrawCmd();
return;
}
// Try to merge with previous command if it matches, else use current command
ImDrawCmd* prev_cmd = CmdBuffer.Size > 1 ? curr_cmd - 1 : NULL;
if (curr_cmd->ElemCount == 0 && prev_cmd && memcmp(&prev_cmd->ClipRect, &curr_clip_rect, sizeof(ImVec4)) == 0 && prev_cmd->TextureId == GetCurrentTextureId() && prev_cmd->UserCallback == NULL)
CmdBuffer.pop_back();
else
curr_cmd->ClipRect = curr_clip_rect;
}
void ImDrawList::UpdateTextureID()
{
// If current command is used with different settings we need to add a new command
const ImTextureID curr_texture_id = GetCurrentTextureId();
ImDrawCmd* curr_cmd = CmdBuffer.Size ? &CmdBuffer.back() : NULL;
if (!curr_cmd || (curr_cmd->ElemCount != 0 && curr_cmd->TextureId != curr_texture_id) || curr_cmd->UserCallback != NULL)
{
AddDrawCmd();
return;
}
// Try to merge with previous command if it matches, else use current command
ImDrawCmd* prev_cmd = CmdBuffer.Size > 1 ? curr_cmd - 1 : NULL;
if (prev_cmd && prev_cmd->TextureId == curr_texture_id && memcmp(&prev_cmd->ClipRect, &GetCurrentClipRect(), sizeof(ImVec4)) == 0 && prev_cmd->UserCallback == NULL)
CmdBuffer.pop_back();
else
curr_cmd->TextureId = curr_texture_id;
}
#undef GetCurrentClipRect
#undef GetCurrentTextureId
// Render-level scissoring. This is passed down to your render function but not used for CPU-side coarse clipping. Prefer using higher-level ImGui::PushClipRect() to affect logic (hit-testing and widget culling)
void ImDrawList::PushClipRect(ImVec2 cr_min, ImVec2 cr_max, bool intersect_with_current_clip_rect)
{
ImVec4 cr(cr_min.x, cr_min.y, cr_max.x, cr_max.y);
if (intersect_with_current_clip_rect && _ClipRectStack.Size)
{
ImVec4 current = _ClipRectStack.Data[_ClipRectStack.Size-1];
if (cr.x < current.x) cr.x = current.x;
if (cr.y < current.y) cr.y = current.y;
if (cr.z > current.z) cr.z = current.z;
if (cr.w > current.w) cr.w = current.w;
}
cr.z = ImMax(cr.x, cr.z);
cr.w = ImMax(cr.y, cr.w);
_ClipRectStack.push_back(cr);
UpdateClipRect();
}
void ImDrawList::PushClipRectFullScreen()
{
PushClipRect(ImVec2(GNullClipRect.x, GNullClipRect.y), ImVec2(GNullClipRect.z, GNullClipRect.w));
//PushClipRect(GetVisibleRect()); // FIXME-OPT: This would be more correct but we're not supposed to access ImGuiContext from here?
}
void ImDrawList::PopClipRect()
{
IM_ASSERT(_ClipRectStack.Size > 0);
_ClipRectStack.pop_back();
UpdateClipRect();
}
void ImDrawList::PushTextureID(const ImTextureID& texture_id)
{
_TextureIdStack.push_back(texture_id);
UpdateTextureID();
}
void ImDrawList::PopTextureID()
{
IM_ASSERT(_TextureIdStack.Size > 0);
_TextureIdStack.pop_back();
UpdateTextureID();
}
void ImDrawList::ChannelsSplit(int channels_count)
{
IM_ASSERT(_ChannelsCurrent == 0 && _ChannelsCount == 1);
int old_channels_count = _Channels.Size;
if (old_channels_count < channels_count)
_Channels.resize(channels_count);
_ChannelsCount = channels_count;
// _Channels[] (24 bytes each) hold storage that we'll swap with this->_CmdBuffer/_IdxBuffer
// The content of _Channels[0] at this point doesn't matter. We clear it to make state tidy in a debugger but we don't strictly need to.
// When we switch to the next channel, we'll copy _CmdBuffer/_IdxBuffer into _Channels[0] and then _Channels[1] into _CmdBuffer/_IdxBuffer
memset(&_Channels[0], 0, sizeof(ImDrawChannel));
for (int i = 1; i < channels_count; i++)
{
if (i >= old_channels_count)
{
IM_PLACEMENT_NEW(&_Channels[i]) ImDrawChannel();
}
else
{
_Channels[i].CmdBuffer.resize(0);
_Channels[i].IdxBuffer.resize(0);
}
if (_Channels[i].CmdBuffer.Size == 0)
{
ImDrawCmd draw_cmd;
draw_cmd.ClipRect = _ClipRectStack.back();
draw_cmd.TextureId = _TextureIdStack.back();
_Channels[i].CmdBuffer.push_back(draw_cmd);
}
}
}
void ImDrawList::ChannelsMerge()
{
// Note that we never use or rely on channels.Size because it is merely a buffer that we never shrink back to 0 to keep all sub-buffers ready for use.
if (_ChannelsCount <= 1)
return;
ChannelsSetCurrent(0);
if (CmdBuffer.Size && CmdBuffer.back().ElemCount == 0)
CmdBuffer.pop_back();
int new_cmd_buffer_count = 0, new_idx_buffer_count = 0;
for (int i = 1; i < _ChannelsCount; i++)
{
ImDrawChannel& ch = _Channels[i];
if (ch.CmdBuffer.Size && ch.CmdBuffer.back().ElemCount == 0)
ch.CmdBuffer.pop_back();
new_cmd_buffer_count += ch.CmdBuffer.Size;
new_idx_buffer_count += ch.IdxBuffer.Size;
}
CmdBuffer.resize(CmdBuffer.Size + new_cmd_buffer_count);
IdxBuffer.resize(IdxBuffer.Size + new_idx_buffer_count);
ImDrawCmd* cmd_write = CmdBuffer.Data + CmdBuffer.Size - new_cmd_buffer_count;
_IdxWritePtr = IdxBuffer.Data + IdxBuffer.Size - new_idx_buffer_count;
for (int i = 1; i < _ChannelsCount; i++)
{
ImDrawChannel& ch = _Channels[i];
if (int sz = ch.CmdBuffer.Size) { memcpy(cmd_write, ch.CmdBuffer.Data, sz * sizeof(ImDrawCmd)); cmd_write += sz; }
if (int sz = ch.IdxBuffer.Size) { memcpy(_IdxWritePtr, ch.IdxBuffer.Data, sz * sizeof(ImDrawIdx)); _IdxWritePtr += sz; }
}
AddDrawCmd();
_ChannelsCount = 1;
}
void ImDrawList::ChannelsSetCurrent(int idx)
{
IM_ASSERT(idx < _ChannelsCount);
if (_ChannelsCurrent == idx) return;
memcpy(&_Channels.Data[_ChannelsCurrent].CmdBuffer, &CmdBuffer, sizeof(CmdBuffer)); // copy 12 bytes, four times
memcpy(&_Channels.Data[_ChannelsCurrent].IdxBuffer, &IdxBuffer, sizeof(IdxBuffer));
_ChannelsCurrent = idx;
memcpy(&CmdBuffer, &_Channels.Data[_ChannelsCurrent].CmdBuffer, sizeof(CmdBuffer));
memcpy(&IdxBuffer, &_Channels.Data[_ChannelsCurrent].IdxBuffer, sizeof(IdxBuffer));
_IdxWritePtr = IdxBuffer.Data + IdxBuffer.Size;
}
// NB: this can be called with negative count for removing primitives (as long as the result does not underflow)
void ImDrawList::PrimReserve(int idx_count, int vtx_count)
{
ImDrawCmd& draw_cmd = CmdBuffer.Data[CmdBuffer.Size-1];
draw_cmd.ElemCount += idx_count;
int vtx_buffer_size = VtxBuffer.Size;
VtxBuffer.resize(vtx_buffer_size + vtx_count);
_VtxWritePtr = VtxBuffer.Data + vtx_buffer_size;
int idx_buffer_size = IdxBuffer.Size;
IdxBuffer.resize(idx_buffer_size + idx_count);
_IdxWritePtr = IdxBuffer.Data + idx_buffer_size;
}
// Fully unrolled with inline call to keep our debug builds decently fast.
void ImDrawList::PrimRect(const ImVec2& a, const ImVec2& c, ImU32 col)
{
ImVec2 b(c.x, a.y), d(a.x, c.y), uv(GImGui->FontTexUvWhitePixel);
ImDrawIdx idx = (ImDrawIdx)_VtxCurrentIdx;
_IdxWritePtr[0] = idx; _IdxWritePtr[1] = (ImDrawIdx)(idx+1); _IdxWritePtr[2] = (ImDrawIdx)(idx+2);
_IdxWritePtr[3] = idx; _IdxWritePtr[4] = (ImDrawIdx)(idx+2); _IdxWritePtr[5] = (ImDrawIdx)(idx+3);
_VtxWritePtr[0].pos = a; _VtxWritePtr[0].uv = uv; _VtxWritePtr[0].col = col;
_VtxWritePtr[1].pos = b; _VtxWritePtr[1].uv = uv; _VtxWritePtr[1].col = col;
_VtxWritePtr[2].pos = c; _VtxWritePtr[2].uv = uv; _VtxWritePtr[2].col = col;
_VtxWritePtr[3].pos = d; _VtxWritePtr[3].uv = uv; _VtxWritePtr[3].col = col;
_VtxWritePtr += 4;
_VtxCurrentIdx += 4;
_IdxWritePtr += 6;
}
void ImDrawList::PrimRectUV(const ImVec2& a, const ImVec2& c, const ImVec2& uv_a, const ImVec2& uv_c, ImU32 col)
{
ImVec2 b(c.x, a.y), d(a.x, c.y), uv_b(uv_c.x, uv_a.y), uv_d(uv_a.x, uv_c.y);
ImDrawIdx idx = (ImDrawIdx)_VtxCurrentIdx;
_IdxWritePtr[0] = idx; _IdxWritePtr[1] = (ImDrawIdx)(idx+1); _IdxWritePtr[2] = (ImDrawIdx)(idx+2);
_IdxWritePtr[3] = idx; _IdxWritePtr[4] = (ImDrawIdx)(idx+2); _IdxWritePtr[5] = (ImDrawIdx)(idx+3);
_VtxWritePtr[0].pos = a; _VtxWritePtr[0].uv = uv_a; _VtxWritePtr[0].col = col;
_VtxWritePtr[1].pos = b; _VtxWritePtr[1].uv = uv_b; _VtxWritePtr[1].col = col;
_VtxWritePtr[2].pos = c; _VtxWritePtr[2].uv = uv_c; _VtxWritePtr[2].col = col;
_VtxWritePtr[3].pos = d; _VtxWritePtr[3].uv = uv_d; _VtxWritePtr[3].col = col;
_VtxWritePtr += 4;
_VtxCurrentIdx += 4;
_IdxWritePtr += 6;
}
void ImDrawList::PrimQuadUV(const ImVec2& a, const ImVec2& b, const ImVec2& c, const ImVec2& d, const ImVec2& uv_a, const ImVec2& uv_b, const ImVec2& uv_c, const ImVec2& uv_d, ImU32 col)
{
ImDrawIdx idx = (ImDrawIdx)_VtxCurrentIdx;
_IdxWritePtr[0] = idx; _IdxWritePtr[1] = (ImDrawIdx)(idx+1); _IdxWritePtr[2] = (ImDrawIdx)(idx+2);
_IdxWritePtr[3] = idx; _IdxWritePtr[4] = (ImDrawIdx)(idx+2); _IdxWritePtr[5] = (ImDrawIdx)(idx+3);
_VtxWritePtr[0].pos = a; _VtxWritePtr[0].uv = uv_a; _VtxWritePtr[0].col = col;
_VtxWritePtr[1].pos = b; _VtxWritePtr[1].uv = uv_b; _VtxWritePtr[1].col = col;
_VtxWritePtr[2].pos = c; _VtxWritePtr[2].uv = uv_c; _VtxWritePtr[2].col = col;
_VtxWritePtr[3].pos = d; _VtxWritePtr[3].uv = uv_d; _VtxWritePtr[3].col = col;
_VtxWritePtr += 4;
_VtxCurrentIdx += 4;
_IdxWritePtr += 6;
}
// TODO: Thickness anti-aliased lines cap are missing their AA fringe.
void ImDrawList::AddPolyline(const ImVec2* points, const int points_count, ImU32 col, bool closed, float thickness, bool anti_aliased)
{
if (points_count < 2)
return;
const ImVec2 uv = GImGui->FontTexUvWhitePixel;
anti_aliased &= GImGui->Style.AntiAliasedLines;
//if (ImGui::GetIO().KeyCtrl) anti_aliased = false; // Debug
int count = points_count;
if (!closed)
count = points_count-1;
const bool thick_line = thickness > 1.0f;
if (anti_aliased)
{
// Anti-aliased stroke
const float AA_SIZE = 1.0f;
const ImU32 col_trans = col & IM_COL32(255,255,255,0);
const int idx_count = thick_line ? count*18 : count*12;
const int vtx_count = thick_line ? points_count*4 : points_count*3;
PrimReserve(idx_count, vtx_count);
// Temporary buffer
ImVec2* temp_normals = (ImVec2*)alloca(points_count * (thick_line ? 5 : 3) * sizeof(ImVec2));
ImVec2* temp_points = temp_normals + points_count;
for (int i1 = 0; i1 < count; i1++)
{
const int i2 = (i1+1) == points_count ? 0 : i1+1;
ImVec2 diff = points[i2] - points[i1];
diff *= ImInvLength(diff, 1.0f);
temp_normals[i1].x = diff.y;
temp_normals[i1].y = -diff.x;
}
if (!closed)
temp_normals[points_count-1] = temp_normals[points_count-2];
if (!thick_line)
{
if (!closed)
{
temp_points[0] = points[0] + temp_normals[0] * AA_SIZE;
temp_points[1] = points[0] - temp_normals[0] * AA_SIZE;
temp_points[(points_count-1)*2+0] = points[points_count-1] + temp_normals[points_count-1] * AA_SIZE;
temp_points[(points_count-1)*2+1] = points[points_count-1] - temp_normals[points_count-1] * AA_SIZE;
}
// FIXME-OPT: Merge the different loops, possibly remove the temporary buffer.
unsigned int idx1 = _VtxCurrentIdx;
for (int i1 = 0; i1 < count; i1++)
{
const int i2 = (i1+1) == points_count ? 0 : i1+1;
unsigned int idx2 = (i1+1) == points_count ? _VtxCurrentIdx : idx1+3;
// Average normals
ImVec2 dm = (temp_normals[i1] + temp_normals[i2]) * 0.5f;
float dmr2 = dm.x*dm.x + dm.y*dm.y;
if (dmr2 > 0.000001f)
{
float scale = 1.0f / dmr2;
if (scale > 100.0f) scale = 100.0f;
dm *= scale;
}
dm *= AA_SIZE;
temp_points[i2*2+0] = points[i2] + dm;
temp_points[i2*2+1] = points[i2] - dm;
// Add indexes
_IdxWritePtr[0] = (ImDrawIdx)(idx2+0); _IdxWritePtr[1] = (ImDrawIdx)(idx1+0); _IdxWritePtr[2] = (ImDrawIdx)(idx1+2);
_IdxWritePtr[3] = (ImDrawIdx)(idx1+2); _IdxWritePtr[4] = (ImDrawIdx)(idx2+2); _IdxWritePtr[5] = (ImDrawIdx)(idx2+0);
_IdxWritePtr[6] = (ImDrawIdx)(idx2+1); _IdxWritePtr[7] = (ImDrawIdx)(idx1+1); _IdxWritePtr[8] = (ImDrawIdx)(idx1+0);
_IdxWritePtr[9] = (ImDrawIdx)(idx1+0); _IdxWritePtr[10]= (ImDrawIdx)(idx2+0); _IdxWritePtr[11]= (ImDrawIdx)(idx2+1);
_IdxWritePtr += 12;
idx1 = idx2;
}
// Add vertexes
for (int i = 0; i < points_count; i++)
{
_VtxWritePtr[0].pos = points[i]; _VtxWritePtr[0].uv = uv; _VtxWritePtr[0].col = col;
_VtxWritePtr[1].pos = temp_points[i*2+0]; _VtxWritePtr[1].uv = uv; _VtxWritePtr[1].col = col_trans;
_VtxWritePtr[2].pos = temp_points[i*2+1]; _VtxWritePtr[2].uv = uv; _VtxWritePtr[2].col = col_trans;
_VtxWritePtr += 3;
}
}
else
{
const float half_inner_thickness = (thickness - AA_SIZE) * 0.5f;
if (!closed)
{
temp_points[0] = points[0] + temp_normals[0] * (half_inner_thickness + AA_SIZE);
temp_points[1] = points[0] + temp_normals[0] * (half_inner_thickness);
temp_points[2] = points[0] - temp_normals[0] * (half_inner_thickness);
temp_points[3] = points[0] - temp_normals[0] * (half_inner_thickness + AA_SIZE);
temp_points[(points_count-1)*4+0] = points[points_count-1] + temp_normals[points_count-1] * (half_inner_thickness + AA_SIZE);
temp_points[(points_count-1)*4+1] = points[points_count-1] + temp_normals[points_count-1] * (half_inner_thickness);
temp_points[(points_count-1)*4+2] = points[points_count-1] - temp_normals[points_count-1] * (half_inner_thickness);
temp_points[(points_count-1)*4+3] = points[points_count-1] - temp_normals[points_count-1] * (half_inner_thickness + AA_SIZE);
}
// FIXME-OPT: Merge the different loops, possibly remove the temporary buffer.
unsigned int idx1 = _VtxCurrentIdx;
for (int i1 = 0; i1 < count; i1++)
{
const int i2 = (i1+1) == points_count ? 0 : i1+1;
unsigned int idx2 = (i1+1) == points_count ? _VtxCurrentIdx : idx1+4;
// Average normals
ImVec2 dm = (temp_normals[i1] + temp_normals[i2]) * 0.5f;
float dmr2 = dm.x*dm.x + dm.y*dm.y;
if (dmr2 > 0.000001f)
{
float scale = 1.0f / dmr2;
if (scale > 100.0f) scale = 100.0f;
dm *= scale;
}
ImVec2 dm_out = dm * (half_inner_thickness + AA_SIZE);
ImVec2 dm_in = dm * half_inner_thickness;
temp_points[i2*4+0] = points[i2] + dm_out;
temp_points[i2*4+1] = points[i2] + dm_in;
temp_points[i2*4+2] = points[i2] - dm_in;
temp_points[i2*4+3] = points[i2] - dm_out;
// Add indexes
_IdxWritePtr[0] = (ImDrawIdx)(idx2+1); _IdxWritePtr[1] = (ImDrawIdx)(idx1+1); _IdxWritePtr[2] = (ImDrawIdx)(idx1+2);
_IdxWritePtr[3] = (ImDrawIdx)(idx1+2); _IdxWritePtr[4] = (ImDrawIdx)(idx2+2); _IdxWritePtr[5] = (ImDrawIdx)(idx2+1);
_IdxWritePtr[6] = (ImDrawIdx)(idx2+1); _IdxWritePtr[7] = (ImDrawIdx)(idx1+1); _IdxWritePtr[8] = (ImDrawIdx)(idx1+0);
_IdxWritePtr[9] = (ImDrawIdx)(idx1+0); _IdxWritePtr[10] = (ImDrawIdx)(idx2+0); _IdxWritePtr[11] = (ImDrawIdx)(idx2+1);
_IdxWritePtr[12] = (ImDrawIdx)(idx2+2); _IdxWritePtr[13] = (ImDrawIdx)(idx1+2); _IdxWritePtr[14] = (ImDrawIdx)(idx1+3);
_IdxWritePtr[15] = (ImDrawIdx)(idx1+3); _IdxWritePtr[16] = (ImDrawIdx)(idx2+3); _IdxWritePtr[17] = (ImDrawIdx)(idx2+2);
_IdxWritePtr += 18;
idx1 = idx2;
}
// Add vertexes
for (int i = 0; i < points_count; i++)
{
_VtxWritePtr[0].pos = temp_points[i*4+0]; _VtxWritePtr[0].uv = uv; _VtxWritePtr[0].col = col_trans;
_VtxWritePtr[1].pos = temp_points[i*4+1]; _VtxWritePtr[1].uv = uv; _VtxWritePtr[1].col = col;
_VtxWritePtr[2].pos = temp_points[i*4+2]; _VtxWritePtr[2].uv = uv; _VtxWritePtr[2].col = col;
_VtxWritePtr[3].pos = temp_points[i*4+3]; _VtxWritePtr[3].uv = uv; _VtxWritePtr[3].col = col_trans;
_VtxWritePtr += 4;
}
}
_VtxCurrentIdx += (ImDrawIdx)vtx_count;
}
else
{
// Non Anti-aliased Stroke
const int idx_count = count*6;
const int vtx_count = count*4; // FIXME-OPT: Not sharing edges
PrimReserve(idx_count, vtx_count);
for (int i1 = 0; i1 < count; i1++)
{
const int i2 = (i1+1) == points_count ? 0 : i1+1;
const ImVec2& p1 = points[i1];
const ImVec2& p2 = points[i2];
ImVec2 diff = p2 - p1;
diff *= ImInvLength(diff, 1.0f);
const float dx = diff.x * (thickness * 0.5f);
const float dy = diff.y * (thickness * 0.5f);
_VtxWritePtr[0].pos.x = p1.x + dy; _VtxWritePtr[0].pos.y = p1.y - dx; _VtxWritePtr[0].uv = uv; _VtxWritePtr[0].col = col;
_VtxWritePtr[1].pos.x = p2.x + dy; _VtxWritePtr[1].pos.y = p2.y - dx; _VtxWritePtr[1].uv = uv; _VtxWritePtr[1].col = col;
_VtxWritePtr[2].pos.x = p2.x - dy; _VtxWritePtr[2].pos.y = p2.y + dx; _VtxWritePtr[2].uv = uv; _VtxWritePtr[2].col = col;
_VtxWritePtr[3].pos.x = p1.x - dy; _VtxWritePtr[3].pos.y = p1.y + dx; _VtxWritePtr[3].uv = uv; _VtxWritePtr[3].col = col;
_VtxWritePtr += 4;
_IdxWritePtr[0] = (ImDrawIdx)(_VtxCurrentIdx); _IdxWritePtr[1] = (ImDrawIdx)(_VtxCurrentIdx+1); _IdxWritePtr[2] = (ImDrawIdx)(_VtxCurrentIdx+2);
_IdxWritePtr[3] = (ImDrawIdx)(_VtxCurrentIdx); _IdxWritePtr[4] = (ImDrawIdx)(_VtxCurrentIdx+2); _IdxWritePtr[5] = (ImDrawIdx)(_VtxCurrentIdx+3);
_IdxWritePtr += 6;
_VtxCurrentIdx += 4;
}
}
}
void ImDrawList::AddConvexPolyFilled(const ImVec2* points, const int points_count, ImU32 col, bool anti_aliased)
{
const ImVec2 uv = GImGui->FontTexUvWhitePixel;
anti_aliased &= GImGui->Style.AntiAliasedShapes;
//if (ImGui::GetIO().KeyCtrl) anti_aliased = false; // Debug
if (anti_aliased)
{
// Anti-aliased Fill
const float AA_SIZE = 1.0f;
const ImU32 col_trans = col & IM_COL32(255,255,255,0);
const int idx_count = (points_count-2)*3 + points_count*6;
const int vtx_count = (points_count*2);
PrimReserve(idx_count, vtx_count);
// Add indexes for fill
unsigned int vtx_inner_idx = _VtxCurrentIdx;
unsigned int vtx_outer_idx = _VtxCurrentIdx+1;
for (int i = 2; i < points_count; i++)
{
_IdxWritePtr[0] = (ImDrawIdx)(vtx_inner_idx); _IdxWritePtr[1] = (ImDrawIdx)(vtx_inner_idx+((i-1)<<1)); _IdxWritePtr[2] = (ImDrawIdx)(vtx_inner_idx+(i<<1));
_IdxWritePtr += 3;
}
// Compute normals
ImVec2* temp_normals = (ImVec2*)alloca(points_count * sizeof(ImVec2));
for (int i0 = points_count-1, i1 = 0; i1 < points_count; i0 = i1++)
{
const ImVec2& p0 = points[i0];
const ImVec2& p1 = points[i1];
ImVec2 diff = p1 - p0;
diff *= ImInvLength(diff, 1.0f);
temp_normals[i0].x = diff.y;
temp_normals[i0].y = -diff.x;
}
for (int i0 = points_count-1, i1 = 0; i1 < points_count; i0 = i1++)
{
// Average normals
const ImVec2& n0 = temp_normals[i0];
const ImVec2& n1 = temp_normals[i1];
ImVec2 dm = (n0 + n1) * 0.5f;
float dmr2 = dm.x*dm.x + dm.y*dm.y;
if (dmr2 > 0.000001f)
{
float scale = 1.0f / dmr2;
if (scale > 100.0f) scale = 100.0f;
dm *= scale;
}
dm *= AA_SIZE * 0.5f;
// Add vertices
_VtxWritePtr[0].pos = (points[i1] - dm); _VtxWritePtr[0].uv = uv; _VtxWritePtr[0].col = col; // Inner
_VtxWritePtr[1].pos = (points[i1] + dm); _VtxWritePtr[1].uv = uv; _VtxWritePtr[1].col = col_trans; // Outer
_VtxWritePtr += 2;
// Add indexes for fringes
_IdxWritePtr[0] = (ImDrawIdx)(vtx_inner_idx+(i1<<1)); _IdxWritePtr[1] = (ImDrawIdx)(vtx_inner_idx+(i0<<1)); _IdxWritePtr[2] = (ImDrawIdx)(vtx_outer_idx+(i0<<1));
_IdxWritePtr[3] = (ImDrawIdx)(vtx_outer_idx+(i0<<1)); _IdxWritePtr[4] = (ImDrawIdx)(vtx_outer_idx+(i1<<1)); _IdxWritePtr[5] = (ImDrawIdx)(vtx_inner_idx+(i1<<1));
_IdxWritePtr += 6;
}
_VtxCurrentIdx += (ImDrawIdx)vtx_count;
}
else
{
// Non Anti-aliased Fill
const int idx_count = (points_count-2)*3;
const int vtx_count = points_count;
PrimReserve(idx_count, vtx_count);
for (int i = 0; i < vtx_count; i++)
{
_VtxWritePtr[0].pos = points[i]; _VtxWritePtr[0].uv = uv; _VtxWritePtr[0].col = col;
_VtxWritePtr++;
}
for (int i = 2; i < points_count; i++)
{
_IdxWritePtr[0] = (ImDrawIdx)(_VtxCurrentIdx); _IdxWritePtr[1] = (ImDrawIdx)(_VtxCurrentIdx+i-1); _IdxWritePtr[2] = (ImDrawIdx)(_VtxCurrentIdx+i);
_IdxWritePtr += 3;
}
_VtxCurrentIdx += (ImDrawIdx)vtx_count;
}
}
void ImDrawList::PathArcToFast(const ImVec2& centre, float radius, int amin, int amax)
{
static ImVec2 circle_vtx[12];
static bool circle_vtx_builds = false;
const int circle_vtx_count = IM_ARRAYSIZE(circle_vtx);
if (!circle_vtx_builds)
{
for (int i = 0; i < circle_vtx_count; i++)
{
const float a = ((float)i / (float)circle_vtx_count) * 2*IM_PI;
circle_vtx[i].x = cosf(a);
circle_vtx[i].y = sinf(a);
}
circle_vtx_builds = true;
}
if (amin > amax) return;
if (radius == 0.0f)
{
_Path.push_back(centre);
}
else
{
_Path.reserve(_Path.Size + (amax - amin + 1));
for (int a = amin; a <= amax; a++)
{
const ImVec2& c = circle_vtx[a % circle_vtx_count];
_Path.push_back(ImVec2(centre.x + c.x * radius, centre.y + c.y * radius));
}
}
}
void ImDrawList::PathArcTo(const ImVec2& centre, float radius, float amin, float amax, int num_segments)
{
if (radius == 0.0f)
_Path.push_back(centre);
_Path.reserve(_Path.Size + (num_segments + 1));
for (int i = 0; i <= num_segments; i++)
{
const float a = amin + ((float)i / (float)num_segments) * (amax - amin);
_Path.push_back(ImVec2(centre.x + cosf(a) * radius, centre.y + sinf(a) * radius));
}
}
static void PathBezierToCasteljau(ImVector<ImVec2>* path, float x1, float y1, float x2, float y2, float x3, float y3, float x4, float y4, float tess_tol, int level)
{
float dx = x4 - x1;
float dy = y4 - y1;
float d2 = ((x2 - x4) * dy - (y2 - y4) * dx);
float d3 = ((x3 - x4) * dy - (y3 - y4) * dx);
d2 = (d2 >= 0) ? d2 : -d2;
d3 = (d3 >= 0) ? d3 : -d3;
if ((d2+d3) * (d2+d3) < tess_tol * (dx*dx + dy*dy))
{
path->push_back(ImVec2(x4, y4));
}
else if (level < 10)
{
float x12 = (x1+x2)*0.5f, y12 = (y1+y2)*0.5f;
float x23 = (x2+x3)*0.5f, y23 = (y2+y3)*0.5f;
float x34 = (x3+x4)*0.5f, y34 = (y3+y4)*0.5f;
float x123 = (x12+x23)*0.5f, y123 = (y12+y23)*0.5f;
float x234 = (x23+x34)*0.5f, y234 = (y23+y34)*0.5f;
float x1234 = (x123+x234)*0.5f, y1234 = (y123+y234)*0.5f;
PathBezierToCasteljau(path, x1,y1, x12,y12, x123,y123, x1234,y1234, tess_tol, level+1);
PathBezierToCasteljau(path, x1234,y1234, x234,y234, x34,y34, x4,y4, tess_tol, level+1);
}
}
void ImDrawList::PathBezierCurveTo(const ImVec2& p2, const ImVec2& p3, const ImVec2& p4, int num_segments)
{
ImVec2 p1 = _Path.back();
if (num_segments == 0)
{
// Auto-tessellated
PathBezierToCasteljau(&_Path, p1.x, p1.y, p2.x, p2.y, p3.x, p3.y, p4.x, p4.y, GImGui->Style.CurveTessellationTol, 0);
}
else
{
float t_step = 1.0f / (float)num_segments;
for (int i_step = 1; i_step <= num_segments; i_step++)
{
float t = t_step * i_step;
float u = 1.0f - t;
float w1 = u*u*u;
float w2 = 3*u*u*t;
float w3 = 3*u*t*t;
float w4 = t*t*t;
_Path.push_back(ImVec2(w1*p1.x + w2*p2.x + w3*p3.x + w4*p4.x, w1*p1.y + w2*p2.y + w3*p3.y + w4*p4.y));
}
}
}
void ImDrawList::PathRect(const ImVec2& a, const ImVec2& b, float rounding, int rounding_corners)
{
float r = rounding;
r = ImMin(r, fabsf(b.x-a.x) * ( ((rounding_corners&(1|2))==(1|2)) || ((rounding_corners&(4|8))==(4|8)) ? 0.5f : 1.0f ) - 1.0f);
r = ImMin(r, fabsf(b.y-a.y) * ( ((rounding_corners&(1|8))==(1|8)) || ((rounding_corners&(2|4))==(2|4)) ? 0.5f : 1.0f ) - 1.0f);
if (r <= 0.0f || rounding_corners == 0)
{
PathLineTo(a);
PathLineTo(ImVec2(b.x,a.y));
PathLineTo(b);
PathLineTo(ImVec2(a.x,b.y));
}
else
{
const float r0 = (rounding_corners & 1) ? r : 0.0f;
const float r1 = (rounding_corners & 2) ? r : 0.0f;
const float r2 = (rounding_corners & 4) ? r : 0.0f;
const float r3 = (rounding_corners & 8) ? r : 0.0f;
PathArcToFast(ImVec2(a.x+r0,a.y+r0), r0, 6, 9);
PathArcToFast(ImVec2(b.x-r1,a.y+r1), r1, 9, 12);
PathArcToFast(ImVec2(b.x-r2,b.y-r2), r2, 0, 3);
PathArcToFast(ImVec2(a.x+r3,b.y-r3), r3, 3, 6);
}
}
void ImDrawList::AddLine(const ImVec2& a, const ImVec2& b, ImU32 col, float thickness)
{
if ((col & IM_COL32_A_MASK) == 0)
return;
PathLineTo(a + ImVec2(0.5f,0.5f));
PathLineTo(b + ImVec2(0.5f,0.5f));
PathStroke(col, false, thickness);
}
// a: upper-left, b: lower-right. we don't render 1 px sized rectangles properly.
void ImDrawList::AddRect(const ImVec2& a, const ImVec2& b, ImU32 col, float rounding, int rounding_corners_flags, float thickness)
{
if ((col & IM_COL32_A_MASK) == 0)
return;
PathRect(a + ImVec2(0.5f,0.5f), b - ImVec2(0.5f,0.5f), rounding, rounding_corners_flags);
PathStroke(col, true, thickness);
}
void ImDrawList::AddRectFilled(const ImVec2& a, const ImVec2& b, ImU32 col, float rounding, int rounding_corners_flags)
{
if ((col & IM_COL32_A_MASK) == 0)
return;
if (rounding > 0.0f)
{
PathRect(a, b, rounding, rounding_corners_flags);
PathFill(col);
}
else
{
PrimReserve(6, 4);
PrimRect(a, b, col);
}
}
void ImDrawList::AddRectFilledMultiColor(const ImVec2& a, const ImVec2& c, ImU32 col_upr_left, ImU32 col_upr_right, ImU32 col_bot_right, ImU32 col_bot_left)
{
if (((col_upr_left | col_upr_right | col_bot_right | col_bot_left) & IM_COL32_A_MASK) == 0)
return;
const ImVec2 uv = GImGui->FontTexUvWhitePixel;
PrimReserve(6, 4);
PrimWriteIdx((ImDrawIdx)(_VtxCurrentIdx)); PrimWriteIdx((ImDrawIdx)(_VtxCurrentIdx+1)); PrimWriteIdx((ImDrawIdx)(_VtxCurrentIdx+2));
PrimWriteIdx((ImDrawIdx)(_VtxCurrentIdx)); PrimWriteIdx((ImDrawIdx)(_VtxCurrentIdx+2)); PrimWriteIdx((ImDrawIdx)(_VtxCurrentIdx+3));
PrimWriteVtx(a, uv, col_upr_left);
PrimWriteVtx(ImVec2(c.x, a.y), uv, col_upr_right);
PrimWriteVtx(c, uv, col_bot_right);
PrimWriteVtx(ImVec2(a.x, c.y), uv, col_bot_left);
}
void ImDrawList::AddQuad(const ImVec2& a, const ImVec2& b, const ImVec2& c, const ImVec2& d, ImU32 col, float thickness)
{
if ((col & IM_COL32_A_MASK) == 0)
return;
PathLineTo(a);
PathLineTo(b);
PathLineTo(c);
PathLineTo(d);
PathStroke(col, true, thickness);
}
void ImDrawList::AddQuadFilled(const ImVec2& a, const ImVec2& b, const ImVec2& c, const ImVec2& d, ImU32 col)
{
if ((col & IM_COL32_A_MASK) == 0)
return;
PathLineTo(a);
PathLineTo(b);
PathLineTo(c);
PathLineTo(d);
PathFill(col);
}
void ImDrawList::AddTriangle(const ImVec2& a, const ImVec2& b, const ImVec2& c, ImU32 col, float thickness)
{
if ((col & IM_COL32_A_MASK) == 0)
return;
PathLineTo(a);
PathLineTo(b);
PathLineTo(c);
PathStroke(col, true, thickness);
}
void ImDrawList::AddTriangleFilled(const ImVec2& a, const ImVec2& b, const ImVec2& c, ImU32 col)
{
if ((col & IM_COL32_A_MASK) == 0)
return;
PathLineTo(a);
PathLineTo(b);
PathLineTo(c);
PathFill(col);
}
void ImDrawList::AddCircle(const ImVec2& centre, float radius, ImU32 col, int num_segments, float thickness)
{
if ((col & IM_COL32_A_MASK) == 0)
return;
const float a_max = IM_PI*2.0f * ((float)num_segments - 1.0f) / (float)num_segments;
PathArcTo(centre, radius-0.5f, 0.0f, a_max, num_segments);
PathStroke(col, true, thickness);
}
void ImDrawList::AddCircleFilled(const ImVec2& centre, float radius, ImU32 col, int num_segments)
{
if ((col & IM_COL32_A_MASK) == 0)
return;
const float a_max = IM_PI*2.0f * ((float)num_segments - 1.0f) / (float)num_segments;
PathArcTo(centre, radius, 0.0f, a_max, num_segments);
PathFill(col);
}
void ImDrawList::AddBezierCurve(const ImVec2& pos0, const ImVec2& cp0, const ImVec2& cp1, const ImVec2& pos1, ImU32 col, float thickness, int num_segments)
{
if ((col & IM_COL32_A_MASK) == 0)
return;
PathLineTo(pos0);
PathBezierCurveTo(cp0, cp1, pos1, num_segments);
PathStroke(col, false, thickness);
}
void ImDrawList::AddText(const ImFont* font, float font_size, const ImVec2& pos, ImU32 col, const char* text_begin, const char* text_end, float wrap_width, const ImVec4* cpu_fine_clip_rect)
{
if ((col & IM_COL32_A_MASK) == 0)
return;
if (text_end == NULL)
text_end = text_begin + strlen(text_begin);
if (text_begin == text_end)
return;
// Note: This is one of the few instance of breaking the encapsulation of ImDrawList, as we pull this from ImGui state, but it is just SO useful.
// Might just move Font/FontSize to ImDrawList?
if (font == NULL)
font = GImGui->Font;
if (font_size == 0.0f)
font_size = GImGui->FontSize;
IM_ASSERT(font->ContainerAtlas->TexID == _TextureIdStack.back()); // Use high-level ImGui::PushFont() or low-level ImDrawList::PushTextureId() to change font.
ImVec4 clip_rect = _ClipRectStack.back();
if (cpu_fine_clip_rect)
{
clip_rect.x = ImMax(clip_rect.x, cpu_fine_clip_rect->x);
clip_rect.y = ImMax(clip_rect.y, cpu_fine_clip_rect->y);
clip_rect.z = ImMin(clip_rect.z, cpu_fine_clip_rect->z);
clip_rect.w = ImMin(clip_rect.w, cpu_fine_clip_rect->w);
}
font->RenderText(this, font_size, pos, col, clip_rect, text_begin, text_end, wrap_width, cpu_fine_clip_rect != NULL);
}
void ImDrawList::AddText(const ImVec2& pos, ImU32 col, const char* text_begin, const char* text_end)
{
AddText(GImGui->Font, GImGui->FontSize, pos, col, text_begin, text_end);
}
void ImDrawList::AddImage(ImTextureID user_texture_id, const ImVec2& a, const ImVec2& b, const ImVec2& uv0, const ImVec2& uv1, ImU32 col)
{
if ((col & IM_COL32_A_MASK) == 0)
return;
// FIXME-OPT: This is wasting draw calls.
const bool push_texture_id = _TextureIdStack.empty() || user_texture_id != _TextureIdStack.back();
if (push_texture_id)
PushTextureID(user_texture_id);
PrimReserve(6, 4);
PrimRectUV(a, b, uv0, uv1, col);
if (push_texture_id)
PopTextureID();
}
//-----------------------------------------------------------------------------
// ImDrawData
//-----------------------------------------------------------------------------
// For backward compatibility: convert all buffers from indexed to de-indexed, in case you cannot render indexed. Note: this is slow and most likely a waste of resources. Always prefer indexed rendering!
void ImDrawData::DeIndexAllBuffers()
{
ImVector<ImDrawVert> new_vtx_buffer;
TotalVtxCount = TotalIdxCount = 0;
for (int i = 0; i < CmdListsCount; i++)
{
ImDrawList* cmd_list = CmdLists[i];
if (cmd_list->IdxBuffer.empty())
continue;
new_vtx_buffer.resize(cmd_list->IdxBuffer.Size);
for (int j = 0; j < cmd_list->IdxBuffer.Size; j++)
new_vtx_buffer[j] = cmd_list->VtxBuffer[cmd_list->IdxBuffer[j]];
cmd_list->VtxBuffer.swap(new_vtx_buffer);
cmd_list->IdxBuffer.resize(0);
TotalVtxCount += cmd_list->VtxBuffer.Size;
}
}
// Helper to scale the ClipRect field of each ImDrawCmd. Use if your final output buffer is at a different scale than ImGui expects, or if there is a difference between your window resolution and framebuffer resolution.