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
|
/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
/* Graphical operations, called from the widget state manager */
#ifndef SCI_GFX_GFX_OPERATIONS_H
#define SCI_GFX_GFX_OPERATIONS_H
#include "sci/gfx/gfx_resmgr.h"
#include "sci/gfx/gfx_tools.h"
#include "sci/gfx/gfx_options.h"
#include "sci/gfx/gfx_system.h"
#include "sci/uinput.h"
#include "common/list.h"
namespace Sci {
struct TextFragment;
#define GFXOP_NO_POINTER -1
/* Threshold in color index mode to differentiate between visible and non-visible stuff.
** GFXOP_ALPHA_THRESHOLD itself should be treated as non-visible.
*/
#define GFXOP_ALPHA_THRESHOLD 0xff
struct TextHandle {
Common::String _text; /**< Copy of the actual text */
int line_height;
Common::Array<TextFragment> lines; /**< Text offsets */
gfx_bitmap_font_t *font;
Common::Array<gfx_pixmap_t *> text_pixmaps;
int width, height;
int priority, control;
gfx_alignment_t halign, valign;
TextHandle();
~TextHandle();
};
/* Unless individually stated otherwise, the following applies:
** All operations herein apply to the standard 320x200 coordinate system.
** All operations perform clipping relative to state->clip_zone.
*/
enum gfx_box_shade_t {
GFX_BOX_SHADE_FLAT,
GFX_BOX_SHADE_RIGHT,
GFX_BOX_SHADE_LEFT,
GFX_BOX_SHADE_DOWN,
GFX_BOX_SHADE_UP
#if 0
/* possible with alphaing, but there is no way to check for
** alpha capability of gfx_driver->draw_filled_rect() yet
*/
, GFX_BOX_SHADE_RIGHT_DOWN,
GFX_BOX_SHADE_LEFT_DOWN,
GFX_BOX_SHADE_RIGHT_UP,
GFX_BOX_SHADE_LEFT_UP
#endif
};
typedef Common::List<rect_t> DirtyRectList;
struct GfxState {
gfx_options_t *options;
Common::Point pointer_pos; /**< Mouse pointer coordinates */
Common::Rect pointerZone; /**< Rectangle in which the pointer can move */
rect_t clip_zone_unscaled; /**< The current UNSCALED clipping zone */
rect_t clip_zone; /**< The current SCALED clipping zone; a cached scaled version of clip_zone_unscaled */
GfxDriver *driver;
int visible_map;
GfxResManager *gfxResMan;
gfx_pixmap_t *priority_map; /**< back buffer priority map (unscaled) */
gfx_pixmap_t *static_priority_map; /**< static buffer priority map (unscaled) */
gfx_pixmap_t *control_map; /**< back buffer control map (only exists unscaled in the first place) */
int tag_mode; /**< Set to 1 after a new pic is drawn and the resource manager has tagged all resources. Reset after the next front buffer update is done, when all resources that are still tagged are flushed. */
int disable_dirty; /**< Set to 1 to disable dirty rect accounting */
int pic_nr; /**< Number of the current pic */
int palette_nr; /**< Palette number of the current pic */
Common::List<sci_event_t> _events;
gfx_pixmap_t *fullscreen_override; /**< An optional override picture which must have unscaled full-screen size, which overrides all other visibility, and which is generally slow */
gfxr_pic_t *pic, *pic_unscaled; /**< The background picture and its unscaled equivalent */
rect_t pic_port_bounds; /**< Picture port bounds */
DirtyRectList _dirtyRects; /**< Dirty rectangles */
};
/** @name Fundamental operations */
/** @{ */
/**
* Initializes a graphics mode.
*
* @param[in] version The interpreter version
* @param[in] state The state to initialize
* @param[in] xfact Horizontal scale factor
* @param[in] yfact Vertical scale factors
* @param[in] mode Graphics mode to use
* @param[in] options Rendering options
* @param[in] resManager Resource manager to use
*/
void gfxop_init(int version, GfxState *state,
gfx_options_t *options, ResourceManager *resManager,
Graphics::PixelFormat mode, int xfact = 1, int yfact = 1);
/**
* Deinitializes a currently active driver.
*
* @param[in] state The state encapsulating the driver in question
*/
void gfxop_exit(GfxState *state);
/**
* Calculates a bit mask calculated from some pixels on the specified
* map.
*
* @param[in] state The state containing the pixels to scan
* @param[in] area The area to check
* @param[in] map The GFX_MASKed map(s) to test
* @return An integer value where, for each 0 <= i <= 15, bit i is set
* iff there exists a map for which the corresponding bit was
* set in the 'map' parameter and for which there exists a
* pixel within the specified area so that the pixel's lower 4
* bits, interpreted as an integer value, equal i. (Short
* version: This is an implementation of "on_control()").
*/
int gfxop_scan_bitmask(GfxState *state, rect_t area, gfx_map_mask_t map);
/**
* Sets the currently visible map.
*
* 'visible_map' can be any of GFX_MASK_VISUAL, GFX_MASK_PRIORITY and
* GFX_MASK_CONTROL; the appropriate map (as far as its contents are known to
* the graphics subsystem) is then subsequently drawn to the screen at each
* update. If this is set to anything other than GFX_MASK_VISUAL, slow
* full-screen updates are performed. Mostly useful for debugging. The screen
* needs to be updated for the changes to take effect.
*
* @param[in] state The state to modify
* @param[in] map The GFX_MASK to set
*/
void gfxop_set_visible_map(GfxState *state, gfx_map_mask_t map);
/**
* Sets a new clipping zone.
*
* @param[in] state The affected state
* @param[in] zone The new clipping zone
*/
void gfxop_set_clip_zone(GfxState *state, rect_t zone);
/** @} */
/** @name Generic drawing operations */
/** @{ */
/**
* Renders a clipped line to the back buffer.
*
* @param[in] state The state affected
* @param[in] start Starting point of the line
* @param[in] end End point of the line
* @param[in] color The color to use for drawing
* @param[in] line_mode Any valid line mode to use
* @param[in] line_style The line style to use
*/
void gfxop_draw_line(GfxState *state,
Common::Point start, Common::Point end, gfx_color_t color,
gfx_line_mode_t line_mode, gfx_line_style_t line_style);
/**
* Draws a non-filled rectangular box to the back buffer.
*
* Boxes drawn in thin lines will surround the minimal area described by rect.
*
* @param[in] state The affected state
* @param[in] rect The rectangular area the box is drawn to
* @param[in] color The color the box is to be drawn in
* @param[in] line_mode The line mode to use
* @param[in] line_style The line style to use for the box
*/
void gfxop_draw_rectangle(GfxState *state, rect_t rect, gfx_color_t color,
gfx_line_mode_t line_mode, gfx_line_style_t line_style);
/**
* Draws a filled box to the back buffer.
*
* The draw mask, control, and priority values are derived from color1.
*
* @param[in] state The affected state
* @param[in] box The area to draw to
* @param[in] color1 The primary color to use for drawing
* @param[in] color2 The secondary color to draw in
* @param[in] shade_type The shading system to use (e.g. GFX_BOX_SHADE_FLAT)
*/
void gfxop_draw_box(GfxState *state, rect_t box, gfx_color_t color1,
gfx_color_t color2, gfx_box_shade_t shade_type);
/**
* Fills a box in the back buffer with a specific color.
*
* This is a simple wrapper function for gfxop_draw_box
*
* @param[in] state The state to draw to
* @param[in] box The box to fill
* @param[in] color The color to use for filling
*/
void gfxop_fill_box(GfxState *state, rect_t box, gfx_color_t color);
/**
* Copies a box from the static buffer to the back buffer.
*
* @param[in] state The affected state
* @param[in] box The box to propagate from the static buffer
*/
void gfxop_clear_box(GfxState *state, rect_t box);
/**
* Updates all dirty rectangles.
*
* In order to track dirty rectangles, they must be enabled in the options. This
* function instructs the resource manager to free all tagged data on certain
* occasions (see gfxop_new_pic).
*
* @param[in] state The relevant state
*/
void gfxop_update(GfxState *state);
/**
* Propagates a box from the back buffer to the front (visible) buffer.
*
* This function instructs the resource manager to free all tagged data on
* certain occasions (see gfxop_new_pic). When called with dirty rectangle
* management enabled, it will automatically propagate all dirty rectangles as
* well, UNLESS dirty frame accounting has been disabled explicitly.
*
* @param[in] state The affected state
* @param[in] box The box to propagate to the front buffer
*/
void gfxop_update_box(GfxState *state, rect_t box);
/**
* Enables dirty frame accounting.
*
* Dirty frame accounting is enabled by default.
*
* @param[in] state The state dirty frame accounting is to be enabled in
*/
void gfxop_enable_dirty_frames(GfxState *state);
/**
* Disables dirty frame accounting.
*
* @param[in] state The state dirty frame accounting is to be disabled in
*/
void gfxop_disable_dirty_frames(GfxState *state);
/** @} */
/** @name Color operations */
/** @{ */
/**
* Maps an r/g/b value to a color and sets a gfx_color_t structure.
*
* In palette mode, this may allocate a new color. Use gfxop_free_color() to
* free that color. If any of the r/g/b values are less than zero, the resulting
* color will not affect the visual map when used for drawing
*
* @param[in] state The current state
* @param[in] color Pointer to the structure to write to
* @param[in] r The red color intensity values of the result color
* @param[in] g The green color intensity values of the result color
* @param[in] b The blue color intensity values of the result color
* @param[in] a The alpha (transparency) value, with 0x00 meaning
* absolutely opaque and 0xff meaning fully transparent.
* Alpha blending support is optional for drivers, so these
* are the only two values that are guaranteed to work as
* intended. Any value in between them must guarantee the
* following opaqueness: opaqueness(x-1) >= opaqueness(x)
* >= opaqueness (x+1) (i.e. ([0,255],
* less-transparent-than) must define a partial order)
* @param[in] priority The priority to use for drawing, or -1 for none
* @param[in] control The control to use for drawing, or -1 to disable drawing
* to the control map
*/
void gfxop_set_color(GfxState *state, gfx_color_t *color, int r, int g, int b,
int a, int priority, int control);
/**
* Designates a color as a 'system color'.
*
* system colors are permanent colors that cannot be deallocated. as such, they must be used with caution.
*
* @param[in] state The affected state
* @param[in] index The index for the new system color
* @param[in] color The color to designate as a system color
*/
void gfxop_set_system_color(GfxState *state, unsigned int index, gfx_color_t *color);
/**
* Frees a color allocated by gfxop_set_color().
*
* This function is a no-op in non-index mode, or if color is a system color.
*
* @param[in] state The state affected
* @param[in] color The color to de-allocate
*/
void gfxop_free_color(GfxState *state, gfx_color_t *color);
/** @} */
/** @name Pointer and IO ops */
/** @{ */
/**
* Suspends program execution for the specified amount of milliseconds.
*
* The mouse pointer will be redrawn continually, if applicable
*
* @param[in] state The state affected
* @param[in] msecs The amount of milliseconds to wait
*/
void gfxop_sleep(GfxState *state, uint32 msecs);
/**
* Sets the mouse pointer to a cursor resource.
*
* @param[in] state The affected state
* @param[in] nr Number of the cursor resource to use
*/
void gfxop_set_pointer_cursor(GfxState *state, int nr);
/**
* Sets the mouse pointer to a view resource.
*
* Use gfxop_set_pointer_cursor(state, GFXOP_NO_POINTER) to disable the pointer.
*
* @param[in] state The affected state
* @param[in] nr Number of the view resource to use
* @param[in] loop View loop to use
* @param[in] cel View cel to use
* @param[in] hotspot Manually set hotspot to use, or NULL for default.
*/
void gfxop_set_pointer_view(GfxState *state, int nr, int loop, int cel, Common::Point *hotspot);
/**
* Teleports the mouse pointer to a specific position.
*
* Depending on the graphics driver, this operation may be without any effect
*
* @param[in] state The state the pointer is in
* @param[in] pos The position to teleport it to
*/
void gfxop_set_pointer_position(GfxState *state, Common::Point pos);
/**
* Limits the mouse movement to a given rectangle.
*
* @param[in] state The affected state
* @param[in] rect The rectangle
*/
void gfxop_set_pointer_zone(GfxState *state, Common::Rect rect);
/**
* Retrieves the next input event from the driver.
*
* @param[in] state The affected state
* @param[in] mask The event mask to poll from (see uinput.h)
* @return The next event in the driver's event queue, or a NONE event
* if no event matching the mask was found.
*/
sci_event_t gfxop_get_event(GfxState *state, unsigned int mask);
/** @} */
/** @name View operations */
/** @{ */
/**
* Determines the number of loops associated with a view.
*
* @param[in] state The state to use
* @param[in] nr Number of the view to investigate
* @return The number of loops, or GFX_ERROR if the view didn't exist
*/
int gfxop_lookup_view_get_loops(GfxState *state, int nr);
/**
* Determines the number of cels associated stored in a loop.
*
* @param[in] state The state to look up in
* @param[in] nr Number of the view to look up in
* @param[in] loop Number of the loop the number of cels of are to be
* investigated
* @return The number of cels in that loop, or GFX_ERROR if either the
* view or the loop didn't exist
*/
int gfxop_lookup_view_get_cels(GfxState *state, int nr, int loop);
/**
* Clips the view/loop/cel position of a cel.
*
* *loop is clipped first, then *cel. The resulting setup will be a valid view
* configuration.
*
* @param[in] state The state to use
* @param[in] nr Number of the view to use
* @param[in] loop Pointer to the variable storing the loop number to verify
* @param[in] cel Pointer to the variable storing the cel number to check
* @return GFX_OK or GFX_ERROR if the view didn't exist
*/
int gfxop_check_cel(GfxState *state, int nr, int *loop, int *cel);
/**
* Resets loop/cel values to zero if they have become invalid.
*
* @param[in] state The state to use
* @param[in] nr Number of the view to use
* @param[in] loop Pointer to the variable storing the loop number to verify
* @param[in] cel Pointer to the variable storing the cel number to check
* @return GFX_OK or GFX_ERROR if the view didn't exist *loop is
* clipped first, then *cel. The resulting setup will be a
* valid view configuration.
*/
int gfxop_overflow_cel(GfxState *state, int nr, int *loop, int *cel);
/**
* Retrieves the width and height of a cel.
*
* @param[in] state The state to use
* @param[in] nr Number of the view
* @param[in] loop Loop number to examine
* @param[in] cel The cel (inside the loop) to look up
* @param[in] width The variable the width will be stored in
* @param[in] height The variable the height will be stored in
* @param[in] offset The variable the cel's x/y offset will be stored in
* @return GFX_OK if the lookup succeeded, GFX_ERROR if the
* nr/loop/cel combination was invalid
*/
int gfxop_get_cel_parameters(GfxState *state, int nr, int loop, int cel,
int *width, int *height, Common::Point *offset);
/**
* Draws (part of) a cel to the back buffer.
*
* @param[in] state The state encapsulating the driver to draw with
* @param[in] nr Number of the view to draw
* @param[in] loop Loop of the cel to draw
* @param[in] cel The cel number of the cel to draw
* @param[in] pos The positino the cel is to be drawn to
* @param[in] color The priority and control values to use for drawing
* @param[in] palette The palette to use
*/
void gfxop_draw_cel(GfxState *state, int nr, int loop, int cel,
Common::Point pos, gfx_color_t color, int palette);
/**
* Draws a cel to the static buffer; no clipping is performed.
*
* No clipping (except for the display borders) is performed.
*
* @param[in] state The state encapsulating the driver to draw with
* @param[in] nr Number of the view to draw
* @param[in] loop Loop of the cel to draw
* @param[in] cel The cel number of the cel to draw
* @param[in] pos The positino the cel is to be drawn to
* @param[in] color The priority and control values to use for drawing
* @param[in] palette The palette to use
*/
void gfxop_draw_cel_static(GfxState *state, int nr, int loop, int cel,
Common::Point pos, gfx_color_t color, int palette);
/**
* Draws (part of) a clipped cel to the static buffer.
*
* This function does clip.
*
* @param[in] state The state encapsulating the driver to draw with
* @param[in] nr Number of the view to draw
* @param[in] loop Loop of the cel to draw
* @param[in] cel The cel number of the cel to draw
* @param[in] pos The positino the cel is to be drawn to
* @param[in] color The priority and control values to use for drawing
* @param[in] palette The palette to use
*/
void gfxop_draw_cel_static_clipped(GfxState *state, int nr, int loop, int cel,
Common::Point pos, gfx_color_t color, int palette);
/** @} */
/** @name Pic operations
* These operations are exempt from clipping */
/** @{ */
/**
* Draws a pic and writes it over the static buffer.
*
* This function instructs the resource manager to tag all data as "unused".
* See the resource manager tag functions for a full description.
*
* @param[in] state The state affected
* @param[in] nr Number of the pic to draw
* @param[in] flags Interpreter-dependant flags to use for drawing
* @param[in] default_palette The default palette for drawing
*/
void gfxop_new_pic(GfxState *state, int nr, int flags, int default_palette);
/**
* Retrieves all meta-information assigned to the current pic.
*
* @param[in] state The state affected
* @return NULL if the pic doesn't exist or has no meta-information,
* the meta-info otherwise. This meta-information is referred
* to as 'internal data' in the pic code
*/
int *gfxop_get_pic_metainfo(GfxState *state);
/**
* Adds a pic to the static buffer.
*
* @param[in] state The state affected
* @param[in] nr Number of the pic to add
* @param[in] flags Interpreter-dependant flags to use for drawing
* @param[in] default_palette The default palette for drawing
*/
void gfxop_add_to_pic(GfxState *state, int nr, int flags, int default_palette);
/** @} */
/** @name Text operations */
/** @{ */
/**
* Returns the fixed line height for one specified font.
*
* @param[in] state The state to work on
* @param[in] font_nr Number of the font to inspect
* @return GFX_ERROR, GFX_FATAL, or the font line height
*/
int gfxop_get_font_height(GfxState *state, int font_nr);
/**
* Calculates the width and height of a specified text in a specified
* font.
*
* @param[in] state The state to use
* @param[in] font_nr Font number to use for the calculation
* @param[in] text The text to examine
* @param[in] flags ORred GFXR_FONT_FLAGs
* @param[in] maxwidth The maximum pixel width to allow for the text
* @param[out] width The resulting width
* @param[out] height The resulting height
* @param[out] lines_nr Number of lines used in the text
* @param[out] lineheight Pixel height (SCI scale) of each text line
* @param[out] lastline_width Pixel offset (SCI scale) of the space after
* the last character in the last line
* @return GFX_OK or GFX_ERROR if the font didn't exist
*/
int gfxop_get_text_params(GfxState *state, int font_nr, const char *text,
int maxwidth, int *width, int *height, int flags,
int *lines_nr, int *lineheight, int *lastline_width);
/**
* Generates a new text handle that can be used to draw any text.
*
* The control and priority values for the text will be extracted from color1.
* Note that the colors must have been allocated properly, or the text may
* display in incorrect colors.
*
* @param[in] state The state to use
* @param[in] font_nr Font number to use for the calculation
* @param[in] text The text to examine
* @param[in] maxwidth: The maximum pixel width to allow for the text
* @param[in] halign The horizontal text alignment
* @param[in] valign The vertical text alignment
* @param[in] color1 The text's foreground colors (the function will dither
* between color1 and 2)
* @param[in] color2 The text's foreground colors (the function will dither
* between color1 and 2)
* @param[in] bg_color The background color
* @param[in] flags ORred GFXR_FONT_FLAGs
* @return A newly allocated TextHandle, or NULL if font_nr was
* invalid
*/
TextHandle *gfxop_new_text(GfxState *state, int font_nr,
const Common::String &text, int maxwidth, gfx_alignment_t halign,
gfx_alignment_t valign, gfx_color_t color1, gfx_color_t color2,
gfx_color_t bg_color, int flags);
/**
* Frees a previously allocated text handle and all related resources.
*
* @param[in] state The state to use
* @param[in] handle The handle to free
*/
void gfxop_free_text(GfxState *state, TextHandle *handle);
/**
* Draws text stored in a text handle.
*
* @param[in] state The target state
* @param[in] handle The text handle to use for drawing
* @param[in] zone The rectangular box to draw to. In combination with
* halign and valign, this defines where the text is drawn
* to.
*/
void gfxop_draw_text(GfxState *state, TextHandle *handle, rect_t zone);
/** @} */
/** @name Manual pixmap operations */
/** @{ */
/**
* Grabs a screen section from the back buffer and stores it in a pixmap.
*
* Obviously, this only affects the visual map
*
* @param[in] state The affected state
* @param[in] area The area to grab
* Returns A result pixmap, or NULL on error
*/
gfx_pixmap_t *gfxop_grab_pixmap(GfxState *state, rect_t area);
/**
* Draws part of a pixmap to the screen.
*
* @param[in] state The affected state
* @param[in] pxm The pixmap to draw
* @param[in] zone The segment of the pixmap to draw
* @param[in] pos The position the pixmap should be drawn to
*/
void gfxop_draw_pixmap(GfxState *state, gfx_pixmap_t *pxm, rect_t zone,
Common::Point pos);
/**
* Frees a pixmap returned by gfxop_grab_pixmap().
*
* @param[in] state The affected state
* @param[in] pxm The pixmap to free
*/
void gfxop_free_pixmap(GfxState *state, gfx_pixmap_t *pxm);
/** @} */
/** @name Dirty rectangle operations */
/** @{ */
/**
* Adds a dirty rectangle to 'base' according to a strategy.
*
* @param[in] list the list to add to
* @param[in] box the dirty frame to addable
*/
void gfxdr_add_dirty(DirtyRectList &list, rect_t box);
/**
* Clips a rectangle against another one.
*
* @param[in] rect The rectangle to clip
* @param[in] clipzone The outer bounds rect must be in
* @return 1 if rect is empty now, 0 otherwise
*/
int _gfxop_clip(rect_t *rect, rect_t clipzone);
/** @} */
} // End of namespace Sci
#endif // SCI_GFX_GFX_OPERATIONS_H
|