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[d2df-sdl.git] / e_graphics.pas
1 (* Copyright (C) DooM 2D:Forever Developers
2 *
3 * This program is free software: you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License as published by
5 * the Free Software Foundation, either version 3 of the License, or
6 * (at your option) any later version.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program. If not, see <http://www.gnu.org/licenses/>.
15 *)
16 {$INCLUDE ../shared/a_modes.inc}
17 unit e_graphics;
18
19 interface
20
21 uses
22 SysUtils, Classes, Math, e_log, e_texture, SDL2, GL, GLExt, MAPDEF, ImagingTypes, Imaging, ImagingUtility;
23
24 type
25 TMirrorType=(None, Horizontal, Vertical);
26 TBlending=(None, Blend, Filter, Invert);
27
28 TPoint2i = record
29 X, Y: Integer;
30 end;
31
32 TPoint2f = record
33 X, Y: Double;
34 end;
35
36 TRect = record
37 Left, Top, Right, Bottom: Integer;
38 end;
39
40 TRectWH = record
41 X, Y: Integer;
42 Width, Height: Word;
43 end;
44
45 TRGB = packed record
46 R, G, B: Byte;
47 end;
48
49 PDFPoint = ^TDFPoint;
50 PPoint2f = ^TPoint2f;
51 PRect = ^TRect;
52 PRectWH = ^TRectWH;
53
54
55 //------------------------------------------------------------------
56 // ïðîòîòèïû ôóíêöèé
57 //------------------------------------------------------------------
58 procedure e_InitGL();
59 procedure e_SetViewPort(X, Y, Width, Height: Word);
60 procedure e_ResizeWindow(Width, Height: Integer);
61
62 procedure e_Draw(ID: DWORD; X, Y: Integer; Alpha: Byte; AlphaChannel: Boolean;
63 Blending: Boolean; Mirror: TMirrorType = TMirrorType.None);
64 procedure e_DrawAdv(ID: DWORD; X, Y: Integer; Alpha: Byte; AlphaChannel: Boolean;
65 Blending: Boolean; Angle: Single; RC: PDFPoint; Mirror: TMirrorType = TMirrorType.None);
66 procedure e_DrawSize(ID: DWORD; X, Y: Integer; Alpha: Byte; AlphaChannel: Boolean;
67 Blending: Boolean; Width, Height: Word; Mirror: TMirrorType = TMirrorType.None);
68 procedure e_DrawSizeMirror(ID: DWORD; X, Y: Integer; Alpha: Byte; AlphaChannel: Boolean;
69 Blending: Boolean; Width, Height: Word; Mirror: TMirrorType = TMirrorType.None);
70
71 procedure e_DrawFill(ID: DWORD; X, Y: Integer; XCount, YCount: Word; Alpha: Integer;
72 AlphaChannel: Boolean; Blending: Boolean; ambientBlendMode: Boolean=false);
73
74 procedure e_DrawFillX (id: DWORD; x, y, wdt, hgt: Integer; alpha: Integer; alphachannel: Boolean;
75 blending: Boolean; scale: Single; ambientBlendMode: Boolean=false);
76
77 procedure e_AmbientQuad (x, y, w, h: Integer; r, g, b, a: Byte);
78
79 procedure e_DrawPoint(Size: Byte; X, Y: Integer; Red, Green, Blue: Byte);
80 procedure e_DrawLine(Width: Byte; X1, Y1, X2, Y2: Integer; Red, Green, Blue: Byte; Alpha: Byte = 0);
81 procedure e_DrawQuad(X1, Y1, X2, Y2: Integer; Red, Green, Blue: Byte; Alpha: Byte = 0);
82 procedure e_DrawFillQuad(X1, Y1, X2, Y2: Integer; Red, Green, Blue, Alpha: Byte;
83 Blending: TBlending = TBlending.None);
84 procedure e_DarkenQuad (x0, y0, x1, y1: Integer; a: Integer);
85 procedure e_DarkenQuadWH (x, y, w, h: Integer; a: Integer);
86
87 function e_CreateTextureImg (var img: TImageData; var ID: DWORD): Boolean;
88 function e_CreateTexture(FileName: string; var ID: DWORD): Boolean;
89 function e_CreateTextureEx(FileName: string; var ID: DWORD; fX, fY, fWidth, fHeight: Word): Boolean;
90 function e_CreateTextureMem(pData: Pointer; dataSize: LongInt; var ID: DWORD): Boolean;
91 function e_CreateTextureMemEx(pData: Pointer; dataSize: LongInt; var ID: DWORD; fX, fY, fWidth, fHeight: Word): Boolean;
92 procedure e_GetTextureSize(ID: DWORD; Width, Height: PWord);
93 function e_GetTextureSize2(ID: DWORD): TRectWH;
94 procedure e_DeleteTexture(ID: DWORD);
95 procedure e_RemoveAllTextures();
96
97 // CharFont
98 function e_CharFont_Create(sp: ShortInt=0): DWORD;
99 procedure e_CharFont_AddChar(FontID: DWORD; Texture: Integer; c: Char; w: Byte);
100 procedure e_CharFont_Print(FontID: DWORD; X, Y: Integer; Text: string);
101 procedure e_CharFont_PrintEx(FontID: DWORD; X, Y: Integer; Text: string;
102 Color: TRGB; Scale: Single = 1.0);
103 procedure e_CharFont_PrintFmt(FontID: DWORD; X, Y: Integer; Text: string);
104 procedure e_CharFont_GetSize(FontID: DWORD; Text: string; var w, h: Word);
105 procedure e_CharFont_GetSizeFmt(FontID: DWORD; Text: string; var w, h: Word);
106 function e_CharFont_GetMaxWidth(FontID: DWORD): Word;
107 function e_CharFont_GetMaxHeight(FontID: DWORD): Word;
108 procedure e_CharFont_Remove(FontID: DWORD);
109 procedure e_CharFont_RemoveAll();
110
111 // TextureFont
112 procedure e_TextureFontBuild(Tex: DWORD; var FontID: DWORD; XCount, YCount: Word;
113 Space: ShortInt=0);
114 procedure e_TextureFontKill(FontID: DWORD);
115 procedure e_TextureFontPrint(X, Y: GLint; Text: string; FontID: DWORD);
116 procedure e_TextureFontPrintEx(X, Y: GLint; Text: string; FontID: DWORD; Red, Green,
117 Blue: Byte; Scale: Single; Shadow: Boolean = False);
118 procedure e_TextureFontPrintFmt(X, Y: GLint; Text: string; FontID: DWORD; Shadow: Boolean = False);
119 procedure e_TextureFontGetSize(ID: DWORD; out CharWidth, CharHeight: Byte);
120 procedure e_RemoveAllTextureFont();
121
122 function e_TextureFontCharWidth (ch: Char; FontID: DWORD): Integer;
123 procedure e_TextureFontPrintCharEx (X, Y: Integer; Ch: Char; FontID: DWORD; Shadow: Boolean = False);
124
125 procedure e_ReleaseEngine();
126 procedure e_BeginRender();
127 procedure e_Clear(Mask: TGLbitfield; Red, Green, Blue: Single); overload;
128 procedure e_Clear(); overload;
129 procedure e_EndRender();
130
131 function e_GetGamma(win: PSDL_Window): Byte;
132 procedure e_SetGamma(win: PSDL_Window;Gamma: Byte);
133
134 procedure e_MakeScreenshot(st: TStream; Width, Height: Word);
135
136 function _RGB(Red, Green, Blue: Byte): TRGB;
137 function _Point(X, Y: Integer): TPoint2i;
138 function _Rect(X, Y: Integer; Width, Height: Word): TRectWH;
139 function _TRect(L, T, R, B: LongInt): TRect;
140
141 //function e_getTextGLId (ID: DWORD): GLuint;
142
143 var
144 e_Colors: TRGB;
145 e_NoGraphics: Boolean = False;
146 e_FastScreenshots: Boolean = true; // it's REALLY SLOW with `false`
147 g_dbg_scale: Single = 1.0;
148
149
150 implementation
151
152 uses
153 paszlib, crc, utils;
154
155
156 type
157 TTexture = record
158 tx: GLTexture;
159 end;
160
161 TTextureFont = record
162 Texture: DWORD;
163 TextureID: DWORD;
164 Base: Uint32;
165 CharWidth: Byte;
166 CharHeight: Byte;
167 XC, YC, SPC: Word;
168 end;
169
170 TCharFont = record
171 Chars: array[0..255] of
172 record
173 TextureID: Integer;
174 Width: Byte;
175 end;
176 Space: ShortInt;
177 Height: ShortInt;
178 alive: Boolean;
179 end;
180
181 TSavedTexture = record
182 TexID: DWORD;
183 OldID: DWORD;
184 Pixels: Pointer;
185 end;
186
187 var
188 e_Textures: array of TTexture = nil;
189 e_TextureFonts: array of TTextureFont = nil;
190 e_CharFonts: array of TCharFont;
191 //e_SavedTextures: array of TSavedTexture;
192
193 //function e_getTextGLId (ID: DWORD): GLuint; begin result := e_Textures[ID].tx.id; end;
194
195 //------------------------------------------------------------------
196 // Èíèöèàëèçèðóåò OpenGL
197 //------------------------------------------------------------------
198 procedure e_InitGL();
199 begin
200 if e_NoGraphics then
201 begin
202 e_DummyTextures := True;
203 Exit;
204 end;
205 e_Colors.R := 255;
206 e_Colors.G := 255;
207 e_Colors.B := 255;
208 glDisable(GL_DEPTH_TEST);
209 glEnable(GL_SCISSOR_TEST);
210 glClearColor(0, 0, 0, 0);
211 end;
212
213 procedure e_SetViewPort(X, Y, Width, Height: Word);
214 var
215 mat: Array [0..15] of GLDouble;
216
217 begin
218 if e_NoGraphics then Exit;
219 glLoadIdentity();
220 glScissor(X, Y, Width, Height);
221 glViewport(X, Y, Width, Height);
222 //gluOrtho2D(0, Width, Height, 0);
223
224 glMatrixMode(GL_PROJECTION);
225
226 mat[ 0] := 2.0 / Width;
227 mat[ 1] := 0.0;
228 mat[ 2] := 0.0;
229 mat[ 3] := 0.0;
230
231 mat[ 4] := 0.0;
232 mat[ 5] := -2.0 / Height;
233 mat[ 6] := 0.0;
234 mat[ 7] := 0.0;
235
236 mat[ 8] := 0.0;
237 mat[ 9] := 0.0;
238 mat[10] := 1.0;
239 mat[11] := 0.0;
240
241 mat[12] := -1.0;
242 mat[13] := 1.0;
243 mat[14] := 0.0;
244 mat[15] := 1.0;
245
246 glLoadMatrixd(@mat[0]);
247
248 glMatrixMode(GL_MODELVIEW);
249 glLoadIdentity();
250 end;
251
252 //------------------------------------------------------------------
253 // Èùåò ñâîáîäíûé ýëåìåíò â ìàññèâå òåêñòóð
254 //------------------------------------------------------------------
255 function FindTexture(): DWORD;
256 var
257 i: integer;
258 begin
259 if e_Textures <> nil then
260 for i := 0 to High(e_Textures) do
261 if e_Textures[i].tx.Width = 0 then
262 begin
263 Result := i;
264 Exit;
265 end;
266
267 if e_Textures = nil then
268 begin
269 SetLength(e_Textures, 32);
270 Result := 0;
271 end
272 else
273 begin
274 Result := High(e_Textures) + 1;
275 SetLength(e_Textures, Length(e_Textures) + 32);
276 end;
277 end;
278
279 //------------------------------------------------------------------
280 // Ñîçäàåò òåêñòóðó
281 //------------------------------------------------------------------
282 function e_CreateTexture(FileName: String; var ID: DWORD): Boolean;
283 var
284 find_id: DWORD;
285 fmt: Word;
286 begin
287 Result := False;
288
289 e_WriteLog('Loading texture from '+FileName, TMsgType.Notify);
290
291 find_id := FindTexture();
292
293 if not LoadTexture(FileName, e_Textures[find_id].tx, e_Textures[find_id].tx.Width,
294 e_Textures[find_id].tx.Height, @fmt) then Exit;
295
296 ID := find_id;
297
298 Result := True;
299 end;
300
301 function e_CreateTextureEx(FileName: String; var ID: DWORD; fX, fY, fWidth, fHeight: Word): Boolean;
302 var
303 find_id: DWORD;
304 fmt: Word;
305 begin
306 Result := False;
307
308 find_id := FindTexture();
309
310 if not LoadTextureEx(FileName, e_Textures[find_id].tx, fX, fY, fWidth, fHeight, @fmt) then exit;
311
312 ID := find_id;
313
314 Result := True;
315 end;
316
317 function e_CreateTextureMem(pData: Pointer; dataSize: LongInt; var ID: DWORD): Boolean;
318 var
319 find_id: DWORD;
320 fmt: Word;
321 begin
322 Result := False;
323
324 find_id := FindTexture;
325
326 if not LoadTextureMem(pData, dataSize, e_Textures[find_id].tx, e_Textures[find_id].tx.Width, e_Textures[find_id].tx.Height, @fmt) then exit;
327
328 id := find_id;
329
330 Result := True;
331 end;
332
333 function e_CreateTextureMemEx(pData: Pointer; dataSize: LongInt; var ID: DWORD; fX, fY, fWidth, fHeight: Word): Boolean;
334 var
335 find_id: DWORD;
336 fmt: Word;
337 begin
338 Result := False;
339
340 find_id := FindTexture();
341
342 if not LoadTextureMemEx(pData, dataSize, e_Textures[find_id].tx, fX, fY, fWidth, fHeight, @fmt) then exit;
343
344 ID := find_id;
345
346 Result := True;
347 end;
348
349 function e_CreateTextureImg (var img: TImageData; var ID: DWORD): Boolean;
350 var
351 find_id: DWORD;
352 fmt, tw, th: Word;
353 begin
354 result := false;
355 find_id := FindTexture();
356 if not LoadTextureImg(img, e_Textures[find_id].tx, tw, th, @fmt) then exit;
357 ID := find_id;
358 result := True;
359 end;
360
361 procedure e_GetTextureSize(ID: DWORD; Width, Height: PWord);
362 begin
363 if Width <> nil then Width^ := e_Textures[ID].tx.Width;
364 if Height <> nil then Height^ := e_Textures[ID].tx.Height;
365 end;
366
367 function e_GetTextureSize2(ID: DWORD): TRectWH;
368 var
369 data: PChar;
370 x, y: Integer;
371 w, h: Word;
372 a: Boolean;
373 lastline: Integer;
374 begin
375 w := e_Textures[ID].tx.Width;
376 h := e_Textures[ID].tx.Height;
377
378 Result.Y := 0;
379 Result.X := 0;
380 Result.Width := w;
381 Result.Height := h;
382
383 if e_NoGraphics then Exit;
384
385 data := GetMemory(w*h*4);
386 glEnable(GL_TEXTURE_2D);
387 glBindTexture(GL_TEXTURE_2D, e_Textures[ID].tx.id);
388 glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
389
390 for y := h-1 downto 0 do
391 begin
392 lastline := y;
393 a := True;
394
395 for x := 1 to w-4 do
396 begin
397 a := Byte((data+y*w*4+x*4+3)^) <> 0;
398 if a then Break;
399 end;
400
401 if a then
402 begin
403 Result.Y := h-lastline;
404 Break;
405 end;
406 end;
407
408 for y := 0 to h-1 do
409 begin
410 lastline := y;
411 a := True;
412
413 for x := 1 to w-4 do
414 begin
415 a := Byte((data+y*w*4+x*4+3)^) <> 0;
416 if a then Break;
417 end;
418
419 if a then
420 begin
421 Result.Height := h-lastline-Result.Y;
422 Break;
423 end;
424 end;
425
426 for x := 0 to w-1 do
427 begin
428 lastline := x;
429 a := True;
430
431 for y := 1 to h-4 do
432 begin
433 a := Byte((data+y*w*4+x*4+3)^) <> 0;
434 if a then Break;
435 end;
436
437 if a then
438 begin
439 Result.X := lastline+1;
440 Break;
441 end;
442 end;
443
444 for x := w-1 downto 0 do
445 begin
446 lastline := x;
447 a := True;
448
449 for y := 1 to h-4 do
450 begin
451 a := Byte((data+y*w*4+x*4+3)^) <> 0;
452 if a then Break;
453 end;
454
455 if a then
456 begin
457 Result.Width := lastline-Result.X+1;
458 Break;
459 end;
460 end;
461
462 FreeMemory(data);
463 end;
464
465 procedure e_ResizeWindow(Width, Height: Integer);
466 begin
467 if Height = 0 then
468 Height := 1;
469 e_SetViewPort(0, 0, Width, Height);
470 end;
471
472 procedure drawTxQuad (x0, y0, w, h, tw, th: Integer; u, v: single; Mirror: TMirrorType);
473 var
474 x1, y1, tmp: Integer;
475 begin
476 if (w < 1) or (h < 1) then exit;
477 x1 := x0+w;
478 y1 := y0+h;
479 if Mirror = TMirrorType.Horizontal then begin tmp := x1; x1 := x0; x0 := tmp; end
480 else if Mirror = TMirrorType.Vertical then begin tmp := y1; y1 := y0; y0 := tmp; end;
481 //HACK: make texture one pixel shorter, so it won't wrap
482 if (g_dbg_scale <> 1.0) then
483 begin
484 u := u*tw/(tw+1);
485 v := v*th/(th+1);
486 end;
487 glTexCoord2f(0, v); glVertex2i(x0, y0);
488 glTexCoord2f(0, 0); glVertex2i(x0, y1);
489 glTexCoord2f(u, 0); glVertex2i(x1, y1);
490 glTexCoord2f(u, v); glVertex2i(x1, y0);
491 end;
492
493 procedure e_Draw(ID: DWORD; X, Y: Integer; Alpha: Byte; AlphaChannel: Boolean;
494 Blending: Boolean; Mirror: TMirrorType = TMirrorType.None);
495 begin
496 if e_NoGraphics then Exit;
497 glColor4ub(e_Colors.R, e_Colors.G, e_Colors.B, 255);
498
499 if (Alpha > 0) or (AlphaChannel) or (Blending) then
500 glEnable(GL_BLEND)
501 else
502 glDisable(GL_BLEND);
503
504 if (AlphaChannel) or (Alpha > 0) then
505 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
506
507 if Alpha > 0 then
508 glColor4ub(e_Colors.R, e_Colors.G, e_Colors.B, 255-Alpha);
509
510 if Blending then
511 glBlendFunc(GL_SRC_ALPHA, GL_ONE);
512
513 glEnable(GL_TEXTURE_2D);
514 glBindTexture(GL_TEXTURE_2D, e_Textures[ID].tx.id);
515 glBegin(GL_QUADS);
516
517 drawTxQuad(X, Y, e_Textures[id].tx.width, e_Textures[id].tx.height, e_Textures[id].tx.width, e_Textures[id].tx.height, e_Textures[ID].tx.u, e_Textures[ID].tx.v, Mirror);
518
519 //u := e_Textures[ID].tx.u;
520 //v := e_Textures[ID].tx.v;
521
522 {
523 if Mirror = M_NONE then
524 begin
525 glTexCoord2f(u, 0); glVertex2i(X + e_Textures[id].tx.Width, Y);
526 glTexCoord2f(0, 0); glVertex2i(X, Y);
527 glTexCoord2f(0, -v); glVertex2i(X, Y + e_Textures[id].tx.Height);
528 glTexCoord2f(u, -v); glVertex2i(X + e_Textures[id].tx.Width, Y + e_Textures[id].tx.Height);
529 end
530 else
531 if Mirror = M_HORIZONTAL then
532 begin
533 glTexCoord2f(u, 0); glVertex2i(X, Y);
534 glTexCoord2f(0, 0); glVertex2i(X + e_Textures[id].tx.Width, Y);
535 glTexCoord2f(0, -v); glVertex2i(X + e_Textures[id].tx.Width, Y + e_Textures[id].tx.Height);
536 glTexCoord2f(u, -v); glVertex2i(X, Y + e_Textures[id].tx.Height);
537 end
538 else
539 if Mirror = M_VERTICAL then
540 begin
541 glTexCoord2f(u, -v); glVertex2i(X + e_Textures[id].tx.Width, Y);
542 glTexCoord2f(0, -v); glVertex2i(X, Y);
543 glTexCoord2f(0, 0); glVertex2i(X, Y + e_Textures[id].tx.Height);
544 glTexCoord2f(u, 0); glVertex2i(X + e_Textures[id].tx.Width, Y + e_Textures[id].tx.Height);
545 end;
546 }
547
548 glEnd();
549
550 glDisable(GL_BLEND);
551 end;
552
553 procedure e_DrawSize(ID: DWORD; X, Y: Integer; Alpha: Byte; AlphaChannel: Boolean;
554 Blending: Boolean; Width, Height: Word; Mirror: TMirrorType = TMirrorType.None);
555 var
556 u, v: Single;
557 begin
558 if e_NoGraphics then Exit;
559 glColor4ub(e_Colors.R, e_Colors.G, e_Colors.B, 255);
560
561 if (Alpha > 0) or (AlphaChannel) or (Blending) then
562 glEnable(GL_BLEND)
563 else
564 glDisable(GL_BLEND);
565
566 if (AlphaChannel) or (Alpha > 0) then
567 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
568
569 if Alpha > 0 then
570 glColor4ub(e_Colors.R, e_Colors.G, e_Colors.B, 255-Alpha);
571
572 if Blending then
573 glBlendFunc(GL_SRC_ALPHA, GL_ONE);
574
575 glEnable(GL_TEXTURE_2D);
576 glBindTexture(GL_TEXTURE_2D, e_Textures[ID].tx.id);
577
578 u := e_Textures[ID].tx.u;
579 v := e_Textures[ID].tx.v;
580
581 glBegin(GL_QUADS);
582 glTexCoord2f(0, v); glVertex2i(X, Y);
583 glTexCoord2f(u, v); glVertex2i(X + Width, Y);
584 glTexCoord2f(u, 0); glVertex2i(X + Width, Y + Height);
585 glTexCoord2f(0, 0); glVertex2i(X, Y + Height);
586 glEnd();
587
588 glDisable(GL_BLEND);
589 end;
590
591 procedure e_DrawSizeMirror(ID: DWORD; X, Y: Integer; Alpha: Byte; AlphaChannel: Boolean;
592 Blending: Boolean; Width, Height: Word; Mirror: TMirrorType = TMirrorType.None);
593 begin
594 if e_NoGraphics then Exit;
595 glColor4ub(e_Colors.R, e_Colors.G, e_Colors.B, 255);
596
597 if (Alpha > 0) or (AlphaChannel) or (Blending) then
598 glEnable(GL_BLEND)
599 else
600 glDisable(GL_BLEND);
601
602 if (AlphaChannel) or (Alpha > 0) then
603 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
604
605 if Alpha > 0 then
606 glColor4ub(e_Colors.R, e_Colors.G, e_Colors.B, 255-Alpha);
607
608 if Blending then
609 glBlendFunc(GL_SRC_ALPHA, GL_ONE);
610
611 glEnable(GL_TEXTURE_2D);
612 glBindTexture(GL_TEXTURE_2D, e_Textures[ID].tx.id);
613 glBegin(GL_QUADS);
614 drawTxQuad(X, Y, Width, Height, e_Textures[id].tx.width, e_Textures[id].tx.height, e_Textures[ID].tx.u, e_Textures[ID].tx.v, Mirror);
615 glEnd();
616
617 glDisable(GL_BLEND);
618 end;
619
620 procedure e_DrawFill(ID: DWORD; X, Y: Integer; XCount, YCount: Word; Alpha: Integer;
621 AlphaChannel: Boolean; Blending: Boolean; ambientBlendMode: Boolean=false);
622 var
623 X2, Y2, dx, w, h: Integer;
624 u, v: Single;
625 begin
626 if e_NoGraphics then Exit;
627 glColor4ub(e_Colors.R, e_Colors.G, e_Colors.B, 255);
628 ambientBlendMode := false;
629
630 if (Alpha > 0) or AlphaChannel or Blending then
631 begin
632 glEnable(GL_BLEND);
633 end
634 else
635 begin
636 if not ambientBlendMode then glDisable(GL_BLEND);
637 end;
638 if AlphaChannel or (Alpha > 0) then glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
639 if (Alpha > 0) then glColor4ub(e_Colors.R, e_Colors.G, e_Colors.B, 255-Alpha);
640 if Blending then glBlendFunc(GL_SRC_ALPHA, GL_ONE);
641
642 if (XCount = 0) then XCount := 1;
643 if (YCount = 0) then YCount := 1;
644
645 glEnable(GL_TEXTURE_2D);
646 glBindTexture(GL_TEXTURE_2D, e_Textures[ID].tx.id);
647
648 X2 := X+e_Textures[ID].tx.width*XCount;
649 Y2 := Y+e_Textures[ID].tx.height*YCount;
650
651 //k8: this SHOULD work... i hope
652 if (e_Textures[ID].tx.width = e_Textures[ID].tx.glwidth) and (e_Textures[ID].tx.height = e_Textures[ID].tx.glheight) then
653 begin
654 glBegin(GL_QUADS);
655 glTexCoord2i(0, YCount); glVertex2i(X, Y);
656 glTexCoord2i(XCount, YCount); glVertex2i(X2, Y);
657 glTexCoord2i(XCount, 0); glVertex2i(X2, Y2);
658 glTexCoord2i(0, 0); glVertex2i(X, Y2);
659 glEnd();
660 end
661 else
662 begin
663 glBegin(GL_QUADS);
664 // hard day's night
665 u := e_Textures[ID].tx.u;
666 v := e_Textures[ID].tx.v;
667 w := e_Textures[ID].tx.width;
668 h := e_Textures[ID].tx.height;
669 while YCount > 0 do
670 begin
671 dx := XCount;
672 x2 := X;
673 while dx > 0 do
674 begin
675 glTexCoord2f(0, v); glVertex2i(X, Y);
676 glTexCoord2f(u, v); glVertex2i(X+w, Y);
677 glTexCoord2f(u, 0); glVertex2i(X+w, Y+h);
678 glTexCoord2f(0, 0); glVertex2i(X, Y+h);
679 Inc(X, w);
680 Dec(dx);
681 end;
682 X := x2;
683 Inc(Y, h);
684 Dec(YCount);
685 end;
686 glEnd();
687 end;
688
689 glDisable(GL_BLEND);
690 end;
691
692
693 //TODO: overflow checks
694 function intersectRect (var x0, y0, w0, h0: Integer; const x1, y1, w1, h1: Integer): Boolean;
695 var
696 ex0, ey0: Integer;
697 begin
698 result := false;
699 if (w0 < 1) or (h0 < 1) or (w1 < 1) or (h1 < 1) then exit;
700 // check for intersection
701 if (x0+w0 <= x1) or (y0+h0 <= y1) or (x1+w1 <= x0) or (y1+h1 <= y0) then exit;
702 if (x0 >= x1+w1) or (y0 >= y1+h1) or (x1 >= x0+h0) or (y1 >= y0+h0) then exit;
703 // ok, intersects
704 ex0 := x0+w0;
705 ey0 := y0+h0;
706 if (x0 < x1) then x0 := x1;
707 if (y0 < y1) then y0 := y1;
708 if (ex0 > x1+w1) then ex0 := x1+w1;
709 if (ey0 > y1+h1) then ey0 := y1+h1;
710 w0 := ex0-x0;
711 h0 := ey0-y0;
712 result := (w0 > 0) and (h0 > 0);
713 end;
714
715
716 procedure e_DrawFillX (id: DWORD; x, y, wdt, hgt: Integer; alpha: Integer; alphachannel: Boolean;
717 blending: Boolean; scale: Single; ambientBlendMode: Boolean=false);
718 var
719 x2, y2: Integer;
720 {
721 wassc: Boolean;
722 scxywh: array[0..3] of GLint;
723 vpxywh: array[0..3] of GLint;
724 }
725 w, h, dw, cw, ch, yofs: Integer;
726 u, v, cu, cv: Single;
727 onlyOneY: Boolean;
728
729 {
730 procedure setScissorGLInternal (x, y, w, h: Integer);
731 begin
732 //if not scallowed then exit;
733 x := trunc(x*scale);
734 y := trunc(y*scale);
735 w := trunc(w*scale);
736 h := trunc(h*scale);
737 y := vpxywh[3]-(y+h);
738 if not intersectRect(x, y, w, h, scxywh[0], scxywh[1], scxywh[2], scxywh[3]) then
739 begin
740 glScissor(0, 0, 0, 0);
741 end
742 else
743 begin
744 //writeln(' (', x, ',', y, ')-(', w, ',', h, ')');
745 glScissor(x, y, w, h);
746 end;
747 end;
748 }
749
750 begin
751 if e_NoGraphics then exit;
752 ambientBlendMode := false;
753
754 if (wdt < 1) or (hgt < 1) then exit;
755
756 if (wdt mod e_Textures[ID].tx.width = 0) and (hgt mod e_Textures[ID].tx.height = 0) then
757 begin
758 e_DrawFill(id, x, y, wdt div e_Textures[ID].tx.width, hgt div e_Textures[ID].tx.height, alpha, alphachannel, blending, ambientBlendMode);
759 exit;
760 end;
761
762 glColor4ub(e_Colors.R, e_Colors.G, e_Colors.B, 255);
763
764 if (Alpha > 0) or AlphaChannel or Blending then
765 begin
766 glEnable(GL_BLEND);
767 end
768 else
769 begin
770 if not ambientBlendMode then glDisable(GL_BLEND);
771 end;
772 if AlphaChannel or (Alpha > 0) then glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
773 if (Alpha > 0) then glColor4ub(e_Colors.R, e_Colors.G, e_Colors.B, 255-Alpha);
774 if Blending then glBlendFunc(GL_SRC_ALPHA, GL_ONE);
775
776 glEnable(GL_TEXTURE_2D);
777 glBindTexture(GL_TEXTURE_2D, e_Textures[ID].tx.id);
778
779 x2 := x+wdt;
780 y2 := y+hgt;
781
782 //k8: this SHOULD work... i hope
783 if {false and} (e_Textures[ID].tx.width = e_Textures[ID].tx.glwidth) and (e_Textures[ID].tx.height = e_Textures[ID].tx.glheight) then
784 begin
785 glBegin(GL_QUADS);
786 glTexCoord2f(0, hgt/e_Textures[ID].tx.height); glVertex2i(x, y);
787 glTexCoord2f(wdt/e_Textures[ID].tx.width, hgt/e_Textures[ID].tx.height); glVertex2i(x2, y);
788 glTexCoord2f(wdt/e_Textures[ID].tx.width, 0); glVertex2i(x2, y2);
789 glTexCoord2f(0, 0); glVertex2i(x, y2);
790 glEnd();
791 end
792 else
793 begin
794 // hard day's night; setup scissor
795 {
796 glGetIntegerv(GL_VIEWPORT, @vpxywh[0]);
797 wassc := (glIsEnabled(GL_SCISSOR_TEST) <> 0);
798 if wassc then glGetIntegerv(GL_SCISSOR_BOX, @scxywh[0]) else glGetIntegerv(GL_VIEWPORT, @scxywh[0]);
799 //writeln('(', scxywh[0], ',', scxywh[1], ')-(', scxywh[2], ',', scxywh[3], ')');
800 //glEnable(GL_SCISSOR_TEST);
801 setScissorGLInternal(x, y, wdt, hgt);
802 }
803 // draw quads
804 u := e_Textures[ID].tx.u;
805 v := e_Textures[ID].tx.v;
806 w := e_Textures[ID].tx.width;
807 h := e_Textures[ID].tx.height;
808 x2 := x;
809 if (hgt > h) then begin y += hgt-h; onlyOneY := false; end else onlyOneY := true;
810 glBegin(GL_QUADS);
811 while (hgt > 0) do
812 begin
813 if (hgt >= h) then begin ch := h; cv := v; yofs := 0; end else begin ch := hgt; cv := v/(h/hgt); yofs := h-hgt; end;
814 if onlyOneY then yofs := 0;
815 Dec(hgt, h);
816 dw := wdt;
817 x := x2;
818 while (dw > 0) do
819 begin
820 if (dw >= w) then begin cw := w; cu := u; end else begin cw := dw; cu := u/(w/dw); end;
821 Dec(dw, w);
822 glTexCoord2f(0, cv); glVertex2i(X, Y+yofs);
823 glTexCoord2f(cu, cv); glVertex2i(X+cw, Y+yofs);
824 glTexCoord2f(cu, 0); glVertex2i(X+cw, Y+ch+yofs);
825 glTexCoord2f(0, 0); glVertex2i(X, Y+ch+yofs);
826 Inc(X, w);
827 end;
828 Dec(Y, h);
829 end;
830 glEnd();
831 //if wassc then glEnable(GL_SCISSOR_TEST) else glDisable(GL_SCISSOR_TEST);
832 end;
833
834 glDisable(GL_BLEND);
835 end;
836
837
838 procedure e_AmbientQuad (x, y, w, h: Integer; r, g, b, a: Byte);
839 begin
840 if e_NoGraphics then exit;
841 if (w < 1) or (h < 1) then exit;
842 if (a <> 255) or ((r or g or b) <> 0) then
843 begin
844 glEnable(GL_BLEND);
845 glDisable(GL_TEXTURE_2D);
846 glColor4ub(r, g, b, a);
847 if ((r or g or b) <> 0) then
848 begin
849 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
850 glBegin(GL_QUADS);
851 glVertex2i(x, y);
852 glVertex2i(x+w, y);
853 glVertex2i(x+w, y+h);
854 glVertex2i(x, y+h);
855 glEnd();
856 end;
857 glBlendFunc(GL_ZERO, GL_SRC_ALPHA);
858 glBegin(GL_QUADS);
859 glVertex2i(x, y);
860 glVertex2i(x+w, y);
861 glVertex2i(x+w, y+h);
862 glVertex2i(x, y+h);
863 glEnd();
864 glDisable(GL_BLEND);
865 end;
866 end;
867
868
869 procedure e_DrawAdv(ID: DWORD; X, Y: Integer; Alpha: Byte; AlphaChannel: Boolean;
870 Blending: Boolean; Angle: Single; RC: PDFPoint; Mirror: TMirrorType = TMirrorType.None);
871 begin
872 if e_NoGraphics then Exit;
873
874 glColor4ub(e_Colors.R, e_Colors.G, e_Colors.B, 255);
875
876 if (Alpha > 0) or (AlphaChannel) or (Blending) then
877 glEnable(GL_BLEND)
878 else
879 glDisable(GL_BLEND);
880
881 if (AlphaChannel) or (Alpha > 0) then
882 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
883
884 if Alpha > 0 then
885 glColor4ub(e_Colors.R, e_Colors.G, e_Colors.B, 255-Alpha);
886
887 if Blending then
888 glBlendFunc(GL_SRC_ALPHA, GL_ONE);
889
890 if (Angle <> 0) and (RC <> nil) then
891 begin
892 glPushMatrix();
893 glTranslatef(X+RC.X, Y+RC.Y, 0);
894 glRotatef(Angle, 0, 0, 1);
895 glTranslatef(-(X+RC.X), -(Y+RC.Y), 0);
896 end;
897
898 glEnable(GL_TEXTURE_2D);
899 glBindTexture(GL_TEXTURE_2D, e_Textures[id].tx.id);
900 glBegin(GL_QUADS); //0-1 1-1
901 //00 10
902 drawTxQuad(X, Y, e_Textures[id].tx.width, e_Textures[id].tx.height, e_Textures[id].tx.width, e_Textures[id].tx.height, e_Textures[ID].tx.u, e_Textures[ID].tx.v, Mirror);
903 glEnd();
904
905 if Angle <> 0 then
906 glPopMatrix();
907
908 glDisable(GL_BLEND);
909 end;
910
911 procedure e_DrawPoint(Size: Byte; X, Y: Integer; Red, Green, Blue: Byte);
912 begin
913 if e_NoGraphics then Exit;
914 glDisable(GL_TEXTURE_2D);
915 glColor3ub(Red, Green, Blue);
916 glPointSize(Size);
917
918 if (Size = 2) or (Size = 4) then
919 X := X + 1;
920
921 glBegin(GL_POINTS);
922 glVertex2f(X+0.3, Y+1.0);
923 glEnd();
924
925 glColor4ub(e_Colors.R, e_Colors.G, e_Colors.B, 255);
926 end;
927
928 procedure e_LineCorrection(var X1, Y1, X2, Y2: Integer);
929 begin
930 // Make lines only top-left/bottom-right and top-right/bottom-left
931 if Y2 < Y1 then
932 begin
933 X1 := X1 xor X2;
934 X2 := X1 xor X2;
935 X1 := X1 xor X2;
936
937 Y1 := Y1 xor Y2;
938 Y2 := Y1 xor Y2;
939 Y1 := Y1 xor Y2;
940 end;
941
942 // Pixel-perfect hack
943 if X1 < X2 then
944 Inc(X2)
945 else
946 Inc(X1);
947 Inc(Y2);
948 end;
949
950 procedure e_DrawQuad(X1, Y1, X2, Y2: Integer; Red, Green, Blue: Byte; Alpha: Byte = 0);
951 var
952 nX1, nY1, nX2, nY2: Integer;
953 begin
954 if e_NoGraphics then Exit;
955 // Only top-left/bottom-right quad
956 if X1 > X2 then
957 begin
958 X1 := X1 xor X2;
959 X2 := X1 xor X2;
960 X1 := X1 xor X2;
961 end;
962 if Y1 > Y2 then
963 begin
964 Y1 := Y1 xor Y2;
965 Y2 := Y1 xor Y2;
966 Y1 := Y1 xor Y2;
967 end;
968
969 if Alpha > 0 then
970 begin
971 glEnable(GL_BLEND);
972 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
973 end else
974 glDisable(GL_BLEND);
975
976 glDisable(GL_TEXTURE_2D);
977 glColor4ub(Red, Green, Blue, 255-Alpha);
978 glLineWidth(1);
979
980 glBegin(GL_LINES);
981 nX1 := X1; nY1 := Y1;
982 nX2 := X2; nY2 := Y1;
983 e_LineCorrection(nX1, nY1, nX2, nY2); // Pixel-perfect lines
984 glVertex2i(nX1, nY1);
985 glVertex2i(nX2, nY2);
986
987 nX1 := X2; nY1 := Y1;
988 nX2 := X2; nY2 := Y2;
989 e_LineCorrection(nX1, nY1, nX2, nY2);
990 glVertex2i(nX1, nY1);
991 glVertex2i(nX2, nY2);
992
993 nX1 := X2; nY1 := Y2;
994 nX2 := X1; nY2 := Y2;
995 e_LineCorrection(nX1, nY1, nX2, nY2);
996 glVertex2i(nX1, nY1);
997 glVertex2i(nX2, nY2);
998
999 nX1 := X1; nY1 := Y2;
1000 nX2 := X1; nY2 := Y1;
1001 e_LineCorrection(nX1, nY1, nX2, nY2);
1002 glVertex2i(nX1, nY1);
1003 glVertex2i(nX2, nY2);
1004 glEnd();
1005
1006 glColor4ub(e_Colors.R, e_Colors.G, e_Colors.B, 255);
1007
1008 glDisable(GL_BLEND);
1009 end;
1010
1011 procedure e_DrawFillQuad(X1, Y1, X2, Y2: Integer; Red, Green, Blue, Alpha: Byte;
1012 Blending: TBlending = TBlending.None);
1013 begin
1014 if e_NoGraphics then Exit;
1015 if (Alpha > 0) or (Blending <> TBlending.None) then
1016 glEnable(GL_BLEND)
1017 else
1018 glDisable(GL_BLEND);
1019
1020 if Blending = TBlending.Blend then
1021 glBlendFunc(GL_SRC_ALPHA, GL_ONE)
1022 else
1023 if Blending = TBlending.Filter then
1024 glBlendFunc(GL_DST_COLOR, GL_SRC_COLOR)
1025 else
1026 if Blending = TBlending.Invert then
1027 glBlendFunc(GL_ONE_MINUS_DST_COLOR, GL_ZERO)
1028 else
1029 if Alpha > 0 then
1030 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1031
1032 glDisable(GL_TEXTURE_2D);
1033 glColor4ub(Red, Green, Blue, 255-Alpha);
1034
1035 X2 := X2 + 1;
1036 Y2 := Y2 + 1;
1037
1038 glBegin(GL_QUADS);
1039 glVertex2i(X1, Y1);
1040 glVertex2i(X2, Y1);
1041 glVertex2i(X2, Y2);
1042 glVertex2i(X1, Y2);
1043 glEnd();
1044
1045 glColor4ub(e_Colors.R, e_Colors.G, e_Colors.B, 255);
1046
1047 glDisable(GL_BLEND);
1048 end;
1049
1050
1051 // ////////////////////////////////////////////////////////////////////////// //
1052 procedure e_DarkenQuad (x0, y0, x1, y1: Integer; a: Integer);
1053 begin
1054 if (a < 0) then a := 0;
1055 if (a > 255) then a := 255;
1056 glEnable(GL_BLEND);
1057 glBlendFunc(GL_ZERO, GL_SRC_ALPHA);
1058 glDisable(GL_TEXTURE_2D);
1059 glColor4ub(0, 0, 0, Byte(255-a));
1060 glBegin(GL_QUADS);
1061 glVertex2i(x0, y0);
1062 glVertex2i(x1, y0);
1063 glVertex2i(x1, y1);
1064 glVertex2i(x0, y1);
1065 glEnd();
1066 //glRect(x, y, x+w, y+h);
1067 glColor4ub(1, 1, 1, 1);
1068 glDisable(GL_BLEND);
1069 //glBlendEquation(GL_FUNC_ADD);
1070 end;
1071
1072 procedure e_DarkenQuadWH (x, y, w, h: Integer; a: Integer);
1073 begin
1074 if (w > 0) and (h > 0) then e_DarkenQuad(x, y, x+w, y+h, a);
1075 end;
1076
1077
1078 procedure e_DrawLine(Width: Byte; X1, Y1, X2, Y2: Integer; Red, Green, Blue: Byte; Alpha: Byte = 0);
1079 begin
1080 if e_NoGraphics then Exit;
1081 // Pixel-perfect lines
1082 if Width = 1 then
1083 e_LineCorrection(X1, Y1, X2, Y2);
1084
1085 if Alpha > 0 then
1086 begin
1087 glEnable(GL_BLEND);
1088 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1089 end else
1090 glDisable(GL_BLEND);
1091
1092 glDisable(GL_TEXTURE_2D);
1093 glColor4ub(Red, Green, Blue, 255-Alpha);
1094 glLineWidth(Width);
1095
1096 glBegin(GL_LINES);
1097 glVertex2i(X1, Y1);
1098 glVertex2i(X2, Y2);
1099 glEnd();
1100
1101 glColor4ub(e_Colors.R, e_Colors.G, e_Colors.B, 255);
1102
1103 glDisable(GL_BLEND);
1104 end;
1105
1106 //------------------------------------------------------------------
1107 // Óäàëÿåò òåêñòóðó èç ìàññèâà
1108 //------------------------------------------------------------------
1109 procedure e_DeleteTexture(ID: DWORD);
1110 begin
1111 if not e_NoGraphics then
1112 glDeleteTextures(1, @e_Textures[ID].tx.id);
1113 e_Textures[ID].tx.id := 0;
1114 e_Textures[ID].tx.Width := 0;
1115 e_Textures[ID].tx.Height := 0;
1116 end;
1117
1118 //------------------------------------------------------------------
1119 // Óäàëÿåò âñå òåêñòóðû
1120 //------------------------------------------------------------------
1121 procedure e_RemoveAllTextures();
1122 var
1123 i: integer;
1124 begin
1125 if e_Textures = nil then Exit;
1126
1127 for i := 0 to High(e_Textures) do
1128 if e_Textures[i].tx.Width <> 0 then e_DeleteTexture(i);
1129 e_Textures := nil;
1130 end;
1131
1132 //------------------------------------------------------------------
1133 // Óäàëÿåò äâèæîê
1134 //------------------------------------------------------------------
1135 procedure e_ReleaseEngine();
1136 begin
1137 e_RemoveAllTextures;
1138 e_RemoveAllTextureFont;
1139 end;
1140
1141 procedure e_BeginRender();
1142 begin
1143 if e_NoGraphics then Exit;
1144 glEnable(GL_ALPHA_TEST);
1145 glAlphaFunc(GL_GREATER, 0.0);
1146 end;
1147
1148 procedure e_Clear(Mask: TGLbitfield; Red, Green, Blue: Single); overload;
1149 begin
1150 if e_NoGraphics then Exit;
1151 glClearColor(Red, Green, Blue, 0);
1152 glClear(Mask);
1153 end;
1154
1155 procedure e_Clear(); overload;
1156 begin
1157 if e_NoGraphics then Exit;
1158 glClearColor(0, 0, 0, 0);
1159 glClear(GL_COLOR_BUFFER_BIT);
1160 end;
1161
1162 procedure e_EndRender();
1163 begin
1164 if e_NoGraphics then Exit;
1165 glPopMatrix();
1166 end;
1167
1168 function e_GetGamma(win: PSDL_Window): Byte;
1169 var
1170 ramp: array [0..256*3-1] of Word;
1171 rgb: array [0..2] of Double;
1172 sum: double;
1173 count: integer;
1174 min: integer;
1175 max: integer;
1176 A, B: double;
1177 i, j: integer;
1178 begin
1179 Result := 0;
1180 if e_NoGraphics then Exit;
1181 rgb[0] := 1.0;
1182 rgb[1] := 1.0;
1183 rgb[2] := 1.0;
1184
1185 SDL_GetWindowGammaRamp(win, @ramp[0], @ramp[256], @ramp[512]);
1186
1187 for i := 0 to 2 do
1188 begin
1189 sum := 0;
1190 count := 0;
1191 min := 256 * i;
1192 max := min + 256;
1193
1194 for j := min to max - 1 do
1195 if ramp[j] > 0 then
1196 begin
1197 B := (j mod 256)/256;
1198 A := ramp[j]/65536;
1199 sum := sum + ln(A)/ln(B);
1200 inc(count);
1201 end;
1202 rgb[i] := sum / count;
1203 end;
1204
1205 Result := 100 - Trunc(((rgb[0] + rgb[1] + rgb[2])/3 - 0.23) * 100/(2.7 - 0.23));
1206 end;
1207
1208 procedure e_SetGamma(win: PSDL_Window; Gamma: Byte);
1209 var
1210 ramp: array [0..256*3-1] of Word;
1211 i: integer;
1212 r: double;
1213 g: double;
1214 begin
1215 if e_NoGraphics then Exit;
1216 g := (100 - Gamma)*(2.7 - 0.23)/100 + 0.23;
1217
1218 for i := 0 to 255 do
1219 begin
1220 r := Exp(g * ln(i/256))*65536;
1221 if r < 0 then r := 0
1222 else if r > 65535 then r := 65535;
1223 ramp[i] := trunc(r);
1224 ramp[i + 256] := trunc(r);
1225 ramp[i + 512] := trunc(r);
1226 end;
1227
1228 SDL_SetWindowGammaRamp(win, @ramp[0], @ramp[256], @ramp[512]);
1229 end;
1230
1231 function e_CharFont_Create(sp: ShortInt=0): DWORD;
1232 var
1233 i, id: DWORD;
1234 begin
1235 e_WriteLog('Creating CharFont...', TMsgType.Notify);
1236
1237 id := DWORD(-1);
1238
1239 if e_CharFonts <> nil then
1240 for i := 0 to High(e_CharFonts) do
1241 if not e_CharFonts[i].alive then
1242 begin
1243 id := i;
1244 Break;
1245 end;
1246
1247 if id = DWORD(-1) then
1248 begin
1249 SetLength(e_CharFonts, Length(e_CharFonts) + 1);
1250 id := High(e_CharFonts);
1251 end;
1252
1253 with e_CharFonts[id] do
1254 begin
1255 for i := 0 to High(Chars) do
1256 with Chars[i] do
1257 begin
1258 TextureID := -1;
1259 Width := 0;
1260 end;
1261
1262 Space := sp;
1263 alive := True;
1264 end;
1265
1266 Result := id;
1267 end;
1268
1269 procedure e_CharFont_AddChar(FontID: DWORD; Texture: Integer; c: Char; w: Byte);
1270 begin
1271 with e_CharFonts[FontID].Chars[Ord(c)] do
1272 begin
1273 TextureID := Texture;
1274 Width := w;
1275 end;
1276 end;
1277
1278 procedure e_CharFont_Print(FontID: DWORD; X, Y: Integer; Text: string);
1279 var
1280 a: Integer;
1281 begin
1282 if e_NoGraphics then Exit;
1283 if Text = '' then Exit;
1284 if e_CharFonts = nil then Exit;
1285 if Integer(FontID) > High(e_CharFonts) then Exit;
1286
1287 with e_CharFonts[FontID] do
1288 begin
1289 for a := 1 to Length(Text) do
1290 with Chars[Ord(Text[a])] do
1291 if TextureID <> -1 then
1292 begin
1293 e_Draw(TextureID, X, Y, 0, True, False);
1294 X := X+Width+IfThen(a = Length(Text), 0, Space);
1295 end;
1296 end;
1297 end;
1298
1299 procedure e_CharFont_PrintEx(FontID: DWORD; X, Y: Integer; Text: string;
1300 Color: TRGB; Scale: Single = 1.0);
1301 var
1302 a: Integer;
1303 c: TRGB;
1304 begin
1305 if e_NoGraphics then Exit;
1306 if Text = '' then Exit;
1307 if e_CharFonts = nil then Exit;
1308 if Integer(FontID) > High(e_CharFonts) then Exit;
1309
1310 with e_CharFonts[FontID] do
1311 begin
1312 for a := 1 to Length(Text) do
1313 with Chars[Ord(Text[a])] do
1314 if TextureID <> -1 then
1315 begin
1316 if Scale <> 1.0 then
1317 begin
1318 glPushMatrix;
1319 glScalef(Scale, Scale, 0);
1320 end;
1321
1322 c := e_Colors;
1323 e_Colors := Color;
1324 e_Draw(TextureID, X, Y, 0, True, False);
1325 e_Colors := c;
1326
1327 if Scale <> 1.0 then glPopMatrix;
1328
1329 X := X+Width+IfThen(a = Length(Text), 0, Space);
1330 end;
1331 end;
1332 end;
1333
1334 procedure e_CharFont_PrintFmt(FontID: DWORD; X, Y: Integer; Text: string);
1335 var
1336 a, TX, TY, len: Integer;
1337 tc, c: TRGB;
1338 w, h: Word;
1339 begin
1340 if e_NoGraphics then Exit;
1341 if Text = '' then Exit;
1342 if e_CharFonts = nil then Exit;
1343 if Integer(FontID) > High(e_CharFonts) then Exit;
1344
1345 c.R := 255;
1346 c.G := 255;
1347 c.B := 255;
1348
1349 TX := X;
1350 TY := Y;
1351 len := Length(Text);
1352
1353 e_CharFont_GetSize(FontID, 'A', w, h);
1354
1355 with e_CharFonts[FontID] do
1356 begin
1357 for a := 1 to len do
1358 begin
1359 case Text[a] of
1360 #10: // line feed
1361 begin
1362 TX := X;
1363 TY := TY + h;
1364 continue;
1365 end;
1366 #1: // black
1367 begin
1368 c.R := 0; c.G := 0; c.B := 0;
1369 continue;
1370 end;
1371 #2: // white
1372 begin
1373 c.R := 255; c.G := 255; c.B := 255;
1374 continue;
1375 end;
1376 #3: // darker
1377 begin
1378 c.R := c.R div 2; c.G := c.G div 2; c.B := c.B div 2;
1379 continue;
1380 end;
1381 #4: // lighter
1382 begin
1383 c.R := Min(c.R * 2, 255); c.G := Min(c.G * 2, 255); c.B := Min(c.B * 2, 255);
1384 continue;
1385 end;
1386 #18: // red
1387 begin
1388 c.R := 255; c.G := 0; c.B := 0;
1389 continue;
1390 end;
1391 #19: // green
1392 begin
1393 c.R := 0; c.G := 255; c.B := 0;
1394 continue;
1395 end;
1396 #20: // blue
1397 begin
1398 c.R := 0; c.G := 0; c.B := 255;
1399 continue;
1400 end;
1401 #21: // yellow
1402 begin
1403 c.R := 255; c.G := 255; c.B := 0;
1404 continue;
1405 end;
1406 end;
1407
1408 with Chars[Ord(Text[a])] do
1409 if TextureID <> -1 then
1410 begin
1411 tc := e_Colors;
1412 e_Colors := c;
1413 e_Draw(TextureID, TX, TY, 0, True, False);
1414 e_Colors := tc;
1415
1416 TX := TX+Width+IfThen(a = Length(Text), 0, Space);
1417 end;
1418 end;
1419 end;
1420 end;
1421
1422 procedure e_CharFont_GetSize(FontID: DWORD; Text: string; var w, h: Word);
1423 var
1424 a: Integer;
1425 h2: Word;
1426 begin
1427 w := 0;
1428 h := 0;
1429
1430 if Text = '' then Exit;
1431 if e_CharFonts = nil then Exit;
1432 if Integer(FontID) > High(e_CharFonts) then Exit;
1433
1434 with e_CharFonts[FontID] do
1435 begin
1436 for a := 1 to Length(Text) do
1437 with Chars[Ord(Text[a])] do
1438 if TextureID <> -1 then
1439 begin
1440 w := w+Width+IfThen(a = Length(Text), 0, Space);
1441 e_GetTextureSize(TextureID, nil, @h2);
1442 if h2 > h then h := h2;
1443 end;
1444 end;
1445 end;
1446
1447 procedure e_CharFont_GetSizeFmt(FontID: DWORD; Text: string; var w, h: Word);
1448 var
1449 a, lines, len: Integer;
1450 h2, w2: Word;
1451 begin
1452 w2 := 0;
1453 w := 0;
1454 h := 0;
1455
1456 if Text = '' then Exit;
1457 if e_CharFonts = nil then Exit;
1458 if Integer(FontID) > High(e_CharFonts) then Exit;
1459
1460 lines := 1;
1461 len := Length(Text);
1462
1463 with e_CharFonts[FontID] do
1464 begin
1465 for a := 1 to len do
1466 begin
1467 if Text[a] = #10 then
1468 begin
1469 Inc(lines);
1470 if w2 > w then
1471 begin
1472 w := w2;
1473 w2 := 0;
1474 end;
1475 continue;
1476 end
1477 else if Text[a] in [#1, #2, #3, #4, #18, #19, #20, #21] then
1478 continue;
1479
1480 with Chars[Ord(Text[a])] do
1481 if TextureID <> -1 then
1482 begin
1483 w2 := w2 + Width + IfThen(a = len, 0, Space);
1484 e_GetTextureSize(TextureID, nil, @h2);
1485 if h2 > h then h := h2;
1486 end;
1487 end;
1488 end;
1489
1490 if w2 > w then
1491 w := w2;
1492 h := h * lines;
1493 end;
1494
1495 function e_CharFont_GetMaxWidth(FontID: DWORD): Word;
1496 var
1497 a: Integer;
1498 begin
1499 Result := 0;
1500
1501 if e_CharFonts = nil then Exit;
1502 if Integer(FontID) > High(e_CharFonts) then Exit;
1503
1504 for a := 0 to High(e_CharFonts[FontID].Chars) do
1505 Result := Max(Result, e_CharFonts[FontID].Chars[a].Width);
1506 end;
1507
1508 function e_CharFont_GetMaxHeight(FontID: DWORD): Word;
1509 var
1510 a: Integer;
1511 h2: Word;
1512 begin
1513 Result := 0;
1514
1515 if e_CharFonts = nil then Exit;
1516 if Integer(FontID) > High(e_CharFonts) then Exit;
1517
1518 for a := 0 to High(e_CharFonts[FontID].Chars) do
1519 begin
1520 if e_CharFonts[FontID].Chars[a].TextureID <> -1 then
1521 e_GetTextureSize(e_CharFonts[FontID].Chars[a].TextureID, nil, @h2)
1522 else h2 := 0;
1523 if h2 > Result then Result := h2;
1524 end;
1525 end;
1526
1527 procedure e_CharFont_Remove(FontID: DWORD);
1528 var
1529 a: Integer;
1530 begin
1531 with e_CharFonts[FontID] do
1532 for a := 0 to High(Chars) do
1533 if Chars[a].TextureID <> -1 then e_DeleteTexture(Chars[a].TextureID);
1534
1535 e_CharFonts[FontID].alive := False;
1536 end;
1537
1538 procedure e_CharFont_RemoveAll();
1539 var
1540 a: Integer;
1541 begin
1542 if e_CharFonts = nil then Exit;
1543
1544 for a := 0 to High(e_CharFonts) do
1545 e_CharFont_Remove(a);
1546
1547 e_CharFonts := nil;
1548 end;
1549
1550 procedure e_TextureFontBuild(Tex: DWORD; var FontID: DWORD; XCount, YCount: Word;
1551 Space: ShortInt=0);
1552 var
1553 loop1 : GLuint;
1554 cx, cy : real;
1555 i, id: DWORD;
1556 begin
1557 if e_NoGraphics then Exit;
1558 e_WriteLog('Creating texture font...', TMsgType.Notify);
1559
1560 id := DWORD(-1);
1561
1562 if e_TextureFonts <> nil then
1563 for i := 0 to High(e_TextureFonts) do
1564 if e_TextureFonts[i].Base = 0 then
1565 begin
1566 id := i;
1567 Break;
1568 end;
1569
1570 if id = DWORD(-1) then
1571 begin
1572 SetLength(e_TextureFonts, Length(e_TextureFonts) + 1);
1573 id := High(e_TextureFonts);
1574 end;
1575
1576 with e_TextureFonts[id] do
1577 begin
1578 Base := glGenLists(XCount*YCount);
1579 TextureID := e_Textures[Tex].tx.id;
1580 CharWidth := (e_Textures[Tex].tx.Width div XCount)+Space;
1581 CharHeight := e_Textures[Tex].tx.Height div YCount;
1582 XC := XCount;
1583 YC := YCount;
1584 Texture := Tex;
1585 SPC := Space;
1586 end;
1587
1588 glBindTexture(GL_TEXTURE_2D, e_Textures[Tex].tx.id);
1589 for loop1 := 0 to XCount*YCount-1 do
1590 begin
1591 cx := (loop1 mod XCount)/XCount;
1592 cy := (loop1 div YCount)/YCount;
1593
1594 glNewList(e_TextureFonts[id].Base+loop1, GL_COMPILE);
1595 glBegin(GL_QUADS);
1596 glTexCoord2f(cx, 1.0-cy-1/YCount);
1597 glVertex2i(0, e_Textures[Tex].tx.Height div YCount);
1598
1599 glTexCoord2f(cx+1/XCount, 1.0-cy-1/YCount);
1600 glVertex2i(e_Textures[Tex].tx.Width div XCount, e_Textures[Tex].tx.Height div YCount);
1601
1602 glTexCoord2f(cx+1/XCount, 1.0-cy);
1603 glVertex2i(e_Textures[Tex].tx.Width div XCount, 0);
1604
1605 glTexCoord2f(cx, 1.0-cy);
1606 glVertex2i(0, 0);
1607 glEnd();
1608 glTranslated((e_Textures[Tex].tx.Width div XCount)+Space, 0, 0);
1609 glEndList();
1610 end;
1611
1612 FontID := id;
1613 end;
1614
1615 procedure e_TextureFontKill(FontID: DWORD);
1616 begin
1617 if e_NoGraphics then Exit;
1618 glDeleteLists(e_TextureFonts[FontID].Base, 256);
1619 e_TextureFonts[FontID].Base := 0;
1620 end;
1621
1622 procedure e_TextureFontPrint(X, Y: GLint; Text: string; FontID: DWORD);
1623 begin
1624 if e_NoGraphics then Exit;
1625 if Integer(FontID) > High(e_TextureFonts) then Exit;
1626 if Text = '' then Exit;
1627
1628 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1629 glEnable(GL_BLEND);
1630
1631 glColor4ub(e_Colors.R, e_Colors.G, e_Colors.B, 255);
1632
1633 glPushMatrix;
1634 glBindTexture(GL_TEXTURE_2D, e_TextureFonts[FontID].TextureID);
1635 glEnable(GL_TEXTURE_2D);
1636 glTranslated(x, y, 0);
1637 glListBase(DWORD(Integer(e_TextureFonts[FontID].Base)-32));
1638 glCallLists(Length(Text), GL_UNSIGNED_BYTE, PChar(Text));
1639 glDisable(GL_TEXTURE_2D);
1640 glPopMatrix;
1641
1642 glDisable(GL_BLEND);
1643 end;
1644
1645 // god forgive me for this, but i cannot figure out how to do it without lists
1646 procedure e_TextureFontPrintChar(X, Y: Integer; Ch: Char; FontID: DWORD; Shadow: Boolean = False);
1647 begin
1648 if e_NoGraphics then Exit;
1649 glPushMatrix;
1650
1651 if Shadow then
1652 begin
1653 glColor4ub(0, 0, 0, 128);
1654 glTranslated(X+1, Y+1, 0);
1655 glCallLists(1, GL_UNSIGNED_BYTE, @Ch);
1656 glPopMatrix;
1657 glPushMatrix;
1658 end;
1659
1660 glColor4ub(e_Colors.R, e_Colors.G, e_Colors.B, 255);
1661 glTranslated(X, Y, 0);
1662 glCallLists(1, GL_UNSIGNED_BYTE, @Ch);
1663
1664 glPopMatrix;
1665 end;
1666
1667 procedure e_TextureFontPrintCharEx (X, Y: Integer; Ch: Char; FontID: DWORD; Shadow: Boolean = False);
1668 begin
1669 glBindTexture(GL_TEXTURE_2D, e_TextureFonts[FontID].TextureID);
1670 glEnable(GL_TEXTURE_2D);
1671 //glListBase(DWORD(Integer(e_TextureFonts[FontID].Base)-32));
1672
1673 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1674 glEnable(GL_BLEND);
1675 e_TextureFontPrintChar(X, Y, Ch, FontID, Shadow);
1676 glDisable(GL_TEXTURE_2D);
1677 glDisable(GL_BLEND);
1678 end;
1679
1680 function e_TextureFontCharWidth (ch: Char; FontID: DWORD): Integer;
1681 begin
1682 result := e_TextureFonts[FontID].CharWidth;
1683 end;
1684
1685 procedure e_TextureFontPrintFmt(X, Y: Integer; Text: string; FontID: DWORD; Shadow: Boolean = False);
1686 var
1687 a, TX, TY, len: Integer;
1688 tc, c: TRGB;
1689 w: Word;
1690 begin
1691 if e_NoGraphics then Exit;
1692 if Text = '' then Exit;
1693 if e_TextureFonts = nil then Exit;
1694 if Integer(FontID) > High(e_TextureFonts) then Exit;
1695
1696 c.R := 255;
1697 c.G := 255;
1698 c.B := 255;
1699
1700 TX := X;
1701 TY := Y;
1702 len := Length(Text);
1703
1704 w := e_TextureFonts[FontID].CharWidth;
1705
1706 with e_TextureFonts[FontID] do
1707 begin
1708 glBindTexture(GL_TEXTURE_2D, e_TextureFonts[FontID].TextureID);
1709 glEnable(GL_TEXTURE_2D);
1710 glListBase(DWORD(Integer(e_TextureFonts[FontID].Base)-32));
1711
1712 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1713 glEnable(GL_BLEND);
1714
1715 for a := 1 to len do
1716 begin
1717 case Text[a] of
1718 {#10: // line feed
1719 begin
1720 TX := X;
1721 TY := TY + h;
1722 continue;
1723 end;}
1724 #1: // black
1725 begin
1726 c.R := 0; c.G := 0; c.B := 0;
1727 continue;
1728 end;
1729 #2: // white
1730 begin
1731 c.R := 255; c.G := 255; c.B := 255;
1732 continue;
1733 end;
1734 #3: // darker
1735 begin
1736 c.R := c.R div 2; c.G := c.G div 2; c.B := c.B div 2;
1737 continue;
1738 end;
1739 #4: // lighter
1740 begin
1741 c.R := Min(c.R * 2, 255); c.G := Min(c.G * 2, 255); c.B := Min(c.B * 2, 255);
1742 continue;
1743 end;
1744 #18: // red
1745 begin
1746 c.R := 255; c.G := 0; c.B := 0;
1747 continue;
1748 end;
1749 #19: // green
1750 begin
1751 c.R := 0; c.G := 255; c.B := 0;
1752 continue;
1753 end;
1754 #20: // blue
1755 begin
1756 c.R := 0; c.G := 0; c.B := 255;
1757 continue;
1758 end;
1759 #21: // yellow
1760 begin
1761 c.R := 255; c.G := 255; c.B := 0;
1762 continue;
1763 end;
1764 end;
1765
1766 tc := e_Colors;
1767 e_Colors := c;
1768 e_TextureFontPrintChar(TX, TY, Text[a], FontID, Shadow);
1769 e_Colors := tc;
1770
1771 TX := TX+w;
1772 end;
1773 glDisable(GL_TEXTURE_2D);
1774 glDisable(GL_BLEND);
1775 end;
1776 end;
1777
1778 procedure e_TextureFontPrintEx(X, Y: GLint; Text: string; FontID: DWORD; Red, Green,
1779 Blue: Byte; Scale: Single; Shadow: Boolean = False);
1780 begin
1781 if e_NoGraphics then Exit;
1782 if Text = '' then Exit;
1783
1784 glPushMatrix;
1785 glBindTexture(GL_TEXTURE_2D, e_TextureFonts[FontID].TextureID);
1786 glEnable(GL_TEXTURE_2D);
1787 glListBase(DWORD(Integer(e_TextureFonts[FontID].Base)-32));
1788
1789 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1790 glEnable(GL_BLEND);
1791
1792 if Shadow then
1793 begin
1794 glColor4ub(0, 0, 0, 128);
1795 glTranslated(x+1, y+1, 0);
1796 glScalef(Scale, Scale, 0);
1797 glCallLists(Length(Text), GL_UNSIGNED_BYTE, PChar(Text));
1798 glPopMatrix;
1799 glPushMatrix;
1800 end;
1801
1802 glColor4ub(Red, Green, Blue, 255);
1803 glTranslated(x, y, 0);
1804 glScalef(Scale, Scale, 0);
1805 glCallLists(Length(Text), GL_UNSIGNED_BYTE, PChar(Text));
1806
1807 glDisable(GL_TEXTURE_2D);
1808 glPopMatrix;
1809 glColor3ub(e_Colors.R, e_Colors.G, e_Colors.B);
1810 glDisable(GL_BLEND);
1811 end;
1812
1813 procedure e_TextureFontGetSize(ID: DWORD; out CharWidth, CharHeight: Byte);
1814 begin
1815 CharWidth := 16;
1816 CharHeight := 16;
1817 if e_NoGraphics then Exit;
1818 if Integer(ID) > High(e_TextureFonts) then
1819 Exit;
1820 CharWidth := e_TextureFonts[ID].CharWidth;
1821 CharHeight := e_TextureFonts[ID].CharHeight;
1822 end;
1823
1824 procedure e_RemoveAllTextureFont();
1825 var
1826 i: integer;
1827 begin
1828 if e_NoGraphics then Exit;
1829 if e_TextureFonts = nil then Exit;
1830
1831 for i := 0 to High(e_TextureFonts) do
1832 if e_TextureFonts[i].Base <> 0 then
1833 begin
1834 glDeleteLists(e_TextureFonts[i].Base, 256);
1835 e_TextureFonts[i].Base := 0;
1836 end;
1837
1838 e_TextureFonts := nil;
1839 end;
1840
1841 function _RGB(Red, Green, Blue: Byte): TRGB;
1842 begin
1843 Result.R := Red;
1844 Result.G := Green;
1845 Result.B := Blue;
1846 end;
1847
1848 function _Point(X, Y: Integer): TPoint2i;
1849 begin
1850 Result.X := X;
1851 Result.Y := Y;
1852 end;
1853
1854 function _Rect(X, Y: Integer; Width, Height: Word): TRectWH;
1855 begin
1856 Result.X := X;
1857 Result.Y := Y;
1858 Result.Width := Width;
1859 Result.Height := Height;
1860 end;
1861
1862 function _TRect(L, T, R, B: LongInt): TRect;
1863 begin
1864 Result.Top := T;
1865 Result.Left := L;
1866 Result.Right := R;
1867 Result.Bottom := B;
1868 end;
1869
1870
1871 procedure e_MakeScreenshot (st: TStream; Width, Height: Word);
1872 var
1873 pixels, obuf, scln, ps, pd: PByte;
1874 obufsize: Integer;
1875 dlen: Cardinal;
1876 i, x, y, res: Integer;
1877 sign: array [0..7] of Byte;
1878 hbuf: array [0..12] of Byte;
1879 crc: LongWord;
1880 img: TImageData;
1881 clr: TColor32Rec;
1882 begin
1883 if e_NoGraphics then Exit;
1884 obuf := nil;
1885
1886 // first, extract and pack graphics data
1887 if (Width mod 4) > 0 then Width := Width+4-(Width mod 4);
1888
1889 GetMem(pixels, Width*Height*3);
1890 try
1891 FillChar(pixels^, Width*Height*3, 0);
1892 glReadPixels(0, 0, Width, Height, GL_RGB, GL_UNSIGNED_BYTE, pixels);
1893 //e_WriteLog('PNG: pixels read', MSG_NOTIFY);
1894
1895 if e_FastScreenshots then
1896 begin
1897 // create scanlines
1898 GetMem(scln, (Width*3+1)*Height);
1899 try
1900 ps := pixels;
1901 pd := scln;
1902 Inc(ps, (Width*3)*(Height-1));
1903 for i := 0 to Height-1 do
1904 begin
1905 pd^ := 0; // filter
1906 Inc(pd);
1907 Move(ps^, pd^, Width*3);
1908 Dec(ps, Width*3);
1909 Inc(pd, Width*3);
1910 end;
1911 except
1912 FreeMem(scln);
1913 raise;
1914 end;
1915 FreeMem(pixels);
1916 pixels := scln;
1917
1918 // pack it
1919 obufsize := (Width*3+1)*Height*2;
1920 GetMem(obuf, obufsize);
1921 try
1922 while true do
1923 begin
1924 dlen := obufsize;
1925 res := compress2(Pointer(obuf), dlen, Pointer(pixels), (Width*3+1)*Height, 9);
1926 if res = Z_OK then break;
1927 if res <> Z_BUF_ERROR then raise Exception.Create('can''t pack data for PNG');
1928 obufsize := obufsize*2;
1929 FreeMem(obuf);
1930 obuf := nil;
1931 GetMem(obuf, obufsize);
1932 end;
1933 //e_WriteLog(Format('PNG: pixels compressed from %d to %d', [Integer(Width*Height*3), Integer(dlen)]), MSG_NOTIFY);
1934
1935 // now write PNG
1936
1937 // signature
1938 sign[0] := 137;
1939 sign[1] := 80;
1940 sign[2] := 78;
1941 sign[3] := 71;
1942 sign[4] := 13;
1943 sign[5] := 10;
1944 sign[6] := 26;
1945 sign[7] := 10;
1946 st.writeBuffer(sign, 8);
1947 //e_WriteLog('PNG: signature written', MSG_NOTIFY);
1948
1949 // header
1950 writeIntBE(st, LongWord(13));
1951 sign[0] := 73;
1952 sign[1] := 72;
1953 sign[2] := 68;
1954 sign[3] := 82;
1955 st.writeBuffer(sign, 4);
1956 crc := crc32(0, @sign[0], 4);
1957 hbuf[0] := 0;
1958 hbuf[1] := 0;
1959 hbuf[2] := (Width shr 8) and $ff;
1960 hbuf[3] := Width and $ff;
1961 hbuf[4] := 0;
1962 hbuf[5] := 0;
1963 hbuf[6] := (Height shr 8) and $ff;
1964 hbuf[7] := Height and $ff;
1965 hbuf[8] := 8; // bit depth
1966 hbuf[9] := 2; // RGB
1967 hbuf[10] := 0; // compression method
1968 hbuf[11] := 0; // filter method
1969 hbuf[12] := 0; // no interlace
1970 crc := crc32(crc, @hbuf[0], 13);
1971 st.writeBuffer(hbuf, 13);
1972 writeIntBE(st, crc);
1973 //e_WriteLog('PNG: header written', MSG_NOTIFY);
1974
1975 // image data
1976 writeIntBE(st, LongWord(dlen));
1977 sign[0] := 73;
1978 sign[1] := 68;
1979 sign[2] := 65;
1980 sign[3] := 84;
1981 st.writeBuffer(sign, 4);
1982 crc := crc32(0, @sign[0], 4);
1983 crc := crc32(crc, obuf, dlen);
1984 st.writeBuffer(obuf^, dlen);
1985 writeIntBE(st, crc);
1986 //e_WriteLog('PNG: image data written', MSG_NOTIFY);
1987
1988 // image data end
1989 writeIntBE(st, LongWord(0));
1990 sign[0] := 73;
1991 sign[1] := 69;
1992 sign[2] := 78;
1993 sign[3] := 68;
1994 st.writeBuffer(sign, 4);
1995 crc := crc32(0, @sign[0], 4);
1996 writeIntBE(st, crc);
1997 //e_WriteLog('PNG: end marker written', MSG_NOTIFY);
1998 finally
1999 if obuf <> nil then FreeMem(obuf);
2000 end;
2001 end
2002 else
2003 begin
2004 Imaging.SetOption(ImagingPNGCompressLevel, 9);
2005 Imaging.SetOption(ImagingPNGPreFilter, 6);
2006 InitImage(img);
2007 try
2008 NewImage(Width, Height, TImageFormat.ifR8G8B8, img);
2009 ps := pixels;
2010 //writeln(stderr, 'moving pixels...');
2011 for y := Height-1 downto 0 do
2012 begin
2013 for x := 0 to Width-1 do
2014 begin
2015 clr.r := ps^; Inc(ps);
2016 clr.g := ps^; Inc(ps);
2017 clr.b := ps^; Inc(ps);
2018 clr.a := 255;
2019 SetPixel32(img, x, y, clr);
2020 end;
2021 end;
2022 GlobalMetadata.ClearMetaItems();
2023 GlobalMetadata.ClearMetaItemsForSaving();
2024 //writeln(stderr, 'compressing image...');
2025 if not SaveImageToStream('png', st, img) then raise Exception.Create('screenshot writing error');
2026 //writeln(stderr, 'done!');
2027 finally
2028 FreeImage(img);
2029 end;
2030 end;
2031 finally
2032 FreeMem(pixels);
2033 end;
2034 end;
2035
2036
2037 end.
[MIRROR] a port of Doom 2D Forever to FPC/SDL
[15/08/2024 14:52:34]
DEADSOFTWARE 2012-2024