1 /***********************************************************
2 * Artsoft Retro-Game Library *
3 *----------------------------------------------------------*
4 * (c) 1994-2002 Artsoft Entertainment *
6 * Detmolder Strasse 189 *
9 * e-mail: info@artsoft.org *
10 *----------------------------------------------------------*
12 ***********************************************************/
19 #if defined(PLATFORM_MSDOS)
31 /* ========================================================================= */
32 /* exported variables */
33 /* ========================================================================= */
35 struct ProgramInfo program;
36 struct OptionInfo options;
37 struct VideoSystemInfo video;
38 struct AudioSystemInfo audio;
40 struct ArtworkInfo artwork;
41 struct JoystickInfo joystick;
42 struct SetupInfo setup;
44 LevelDirTree *leveldir_first = NULL;
45 LevelDirTree *leveldir_current = NULL;
48 Display *display = NULL;
49 Visual *visual = NULL;
53 DrawWindow *window = NULL;
54 DrawBuffer *backbuffer = NULL;
55 DrawBuffer *drawto = NULL;
57 int button_status = MB_NOT_PRESSED;
58 boolean motion_status = FALSE;
60 int redraw_mask = REDRAW_NONE;
66 /* ========================================================================= */
67 /* init/close functions */
68 /* ========================================================================= */
70 void InitProgramInfo(char *argv0,
71 char *userdata_directory, char *program_title,
72 char *window_title, char *icon_title,
73 char *x11_icon_filename, char *x11_iconmask_filename,
74 char *msdos_cursor_filename,
75 char *cookie_prefix, char *filename_prefix,
78 program.command_basepath = getBasePath(argv0);
79 program.command_basename = getBaseName(argv0);
81 program.userdata_directory = userdata_directory;
82 program.program_title = program_title;
83 program.window_title = window_title;
84 program.icon_title = icon_title;
85 program.x11_icon_filename = x11_icon_filename;
86 program.x11_iconmask_filename = x11_iconmask_filename;
87 program.msdos_cursor_filename = msdos_cursor_filename;
89 program.cookie_prefix = cookie_prefix;
90 program.filename_prefix = filename_prefix;
92 program.version_major = VERSION_MAJOR(program_version);
93 program.version_minor = VERSION_MINOR(program_version);
94 program.version_patch = VERSION_PATCH(program_version);
97 void InitExitFunction(void (*exit_function)(int))
99 program.exit_function = exit_function;
101 /* set signal handlers to custom exit function */
102 signal(SIGINT, exit_function);
103 signal(SIGTERM, exit_function);
105 #if defined(TARGET_SDL)
106 /* set exit function to automatically cleanup SDL stuff after exit() */
111 void InitPlatformDependentStuff(void)
113 #if defined(PLATFORM_MSDOS)
118 #if defined(TARGET_SDL)
119 if (SDL_Init(SDL_INIT_EVENTTHREAD | SDL_INIT_NOPARACHUTE) < 0)
120 Error(ERR_EXIT, "SDL_Init() failed: %s", SDL_GetError());
126 void ClosePlatformDependentStuff(void)
128 #if defined(PLATFORM_MSDOS)
133 void InitGfxFieldInfo(int sx, int sy, int sxsize, int sysize,
134 int real_sx, int real_sy,
135 int full_sxsize, int full_sysize,
136 Bitmap *field_save_buffer)
142 gfx.real_sx = real_sx;
143 gfx.real_sy = real_sy;
144 gfx.full_sxsize = full_sxsize;
145 gfx.full_sysize = full_sysize;
147 gfx.field_save_buffer = field_save_buffer;
149 gfx.background_bitmap = NULL;
150 gfx.background_bitmap_mask = REDRAW_NONE;
152 SetDrawDeactivationMask(REDRAW_NONE); /* do not deactivate drawing */
153 SetDrawBackgroundMask(REDRAW_NONE); /* deactivate masked drawing */
156 void InitGfxDoor1Info(int dx, int dy, int dxsize, int dysize)
164 void InitGfxDoor2Info(int vx, int vy, int vxsize, int vysize)
172 void InitGfxScrollbufferInfo(int scrollbuffer_width, int scrollbuffer_height)
174 /* currently only used by MSDOS code to alloc VRAM buffer, if available */
175 gfx.scrollbuffer_width = scrollbuffer_width;
176 gfx.scrollbuffer_height = scrollbuffer_height;
179 void SetDrawDeactivationMask(int draw_deactivation_mask)
181 gfx.draw_deactivation_mask = draw_deactivation_mask;
184 void SetDrawBackgroundMask(int draw_background_mask)
186 gfx.draw_background_mask = draw_background_mask;
189 static void DrawBitmapFromTile(Bitmap *bitmap, Bitmap *tile,
190 int dest_x, int dest_y, int width, int height)
192 int bitmap_xsize = width;
193 int bitmap_ysize = height;
194 int tile_xsize = tile->width;
195 int tile_ysize = tile->height;
196 int tile_xsteps = (bitmap_xsize + tile_xsize - 1) / tile_xsize;
197 int tile_ysteps = (bitmap_ysize + tile_ysize - 1) / tile_ysize;
200 for (y = 0; y < tile_ysteps; y++)
202 for (x = 0; x < tile_xsteps; x++)
204 int draw_x = dest_x + x * tile_xsize;
205 int draw_y = dest_y + y * tile_ysize;
206 int draw_xsize = MIN(tile_xsize, bitmap_xsize - x * tile_xsize);
207 int draw_ysize = MIN(tile_ysize, bitmap_ysize - y * tile_ysize);
209 BlitBitmap(tile, bitmap, 0, 0, draw_xsize, draw_ysize, draw_x, draw_y);
214 void SetBackgroundBitmap(Bitmap *background_bitmap_tile, int mask)
216 if (background_bitmap_tile != NULL)
217 gfx.background_bitmap_mask |= mask;
219 gfx.background_bitmap_mask &= ~mask;
221 if (gfx.background_bitmap == NULL)
222 gfx.background_bitmap = CreateBitmap(video.width, video.height,
225 if (background_bitmap_tile == NULL) /* empty background requested */
228 if (mask == REDRAW_FIELD)
229 DrawBitmapFromTile(gfx.background_bitmap, background_bitmap_tile,
230 gfx.real_sx, gfx.real_sy,
231 gfx.full_sxsize, gfx.full_sysize);
232 else if (mask == REDRAW_DOOR_1)
234 DrawBitmapFromTile(gfx.background_bitmap, background_bitmap_tile,
236 gfx.dxsize, gfx.dysize);
240 void SetMainBackgroundBitmap(Bitmap *background_bitmap_tile)
242 SetBackgroundBitmap(background_bitmap_tile, REDRAW_FIELD);
245 void SetDoorBackgroundBitmap(Bitmap *background_bitmap_tile)
247 SetBackgroundBitmap(background_bitmap_tile, REDRAW_DOOR_1);
251 /* ========================================================================= */
252 /* video functions */
253 /* ========================================================================= */
255 inline static int GetRealDepth(int depth)
257 return (depth == DEFAULT_DEPTH ? video.default_depth : depth);
260 inline static void sysFillRectangle(Bitmap *bitmap, int x, int y,
261 int width, int height, Pixel color)
263 #if defined(TARGET_SDL)
264 SDLFillRectangle(bitmap, x, y, width, height, color);
266 X11FillRectangle(bitmap, x, y, width, height, color);
270 inline static void sysCopyArea(Bitmap *src_bitmap, Bitmap *dst_bitmap,
271 int src_x, int src_y, int width, int height,
272 int dst_x, int dst_y, int mask_mode)
274 #if defined(TARGET_SDL)
275 SDLCopyArea(src_bitmap, dst_bitmap, src_x, src_y, width, height,
276 dst_x, dst_y, mask_mode);
278 X11CopyArea(src_bitmap, dst_bitmap, src_x, src_y, width, height,
279 dst_x, dst_y, mask_mode);
283 inline void InitVideoDisplay(void)
285 #if defined(TARGET_SDL)
286 SDLInitVideoDisplay();
288 X11InitVideoDisplay();
292 inline void CloseVideoDisplay(void)
294 KeyboardAutoRepeatOn();
296 #if defined(TARGET_SDL)
297 SDL_QuitSubSystem(SDL_INIT_VIDEO);
300 XCloseDisplay(display);
304 inline void InitVideoBuffer(DrawBuffer **backbuffer, DrawWindow **window,
305 int width, int height, int depth,
309 video.height = height;
310 video.depth = GetRealDepth(depth);
311 video.fullscreen_available = FULLSCREEN_STATUS;
312 video.fullscreen_enabled = FALSE;
314 #if defined(TARGET_SDL)
315 SDLInitVideoBuffer(backbuffer, window, fullscreen);
317 X11InitVideoBuffer(backbuffer, window);
321 inline Bitmap *CreateBitmapStruct(void)
323 #if defined(TARGET_SDL)
324 return checked_calloc(sizeof(struct SDLSurfaceInfo));
326 return checked_calloc(sizeof(struct X11DrawableInfo));
330 inline Bitmap *CreateBitmap(int width, int height, int depth)
332 Bitmap *new_bitmap = CreateBitmapStruct();
333 int real_depth = GetRealDepth(depth);
335 #if defined(TARGET_SDL)
336 SDLCreateBitmapContent(new_bitmap, width, height, real_depth);
338 X11CreateBitmapContent(new_bitmap, width, height, real_depth);
341 new_bitmap->width = width;
342 new_bitmap->height = height;
347 inline static void FreeBitmapPointers(Bitmap *bitmap)
352 #if defined(TARGET_SDL)
353 SDLFreeBitmapPointers(bitmap);
355 X11FreeBitmapPointers(bitmap);
358 checked_free(bitmap->source_filename);
359 bitmap->source_filename = NULL;
362 inline static void TransferBitmapPointers(Bitmap *src_bitmap,
365 if (src_bitmap == NULL || dst_bitmap == NULL)
368 FreeBitmapPointers(dst_bitmap);
370 *dst_bitmap = *src_bitmap;
373 inline void FreeBitmap(Bitmap *bitmap)
378 FreeBitmapPointers(bitmap);
383 inline void CloseWindow(DrawWindow *window)
385 #if defined(TARGET_X11)
386 if (window->drawable)
388 XUnmapWindow(display, window->drawable);
389 XDestroyWindow(display, window->drawable);
392 XFreeGC(display, window->gc);
396 static inline boolean CheckDrawingArea(int x, int y, int width, int height,
399 if (draw_mask == REDRAW_NONE)
402 if (draw_mask & REDRAW_ALL)
405 if ((draw_mask & REDRAW_FIELD) && x < gfx.real_sx + gfx.full_sxsize)
408 if ((draw_mask & REDRAW_DOOR_1) && x >= gfx.dx && y < gfx.dy + gfx.dysize)
411 if ((draw_mask & REDRAW_DOOR_2) && x >= gfx.dx && y >= gfx.vy)
417 inline boolean DrawingDeactivated(int x, int y, int width, int height)
419 return CheckDrawingArea(x, y, width, height, gfx.draw_deactivation_mask);
422 inline boolean DrawingOnBackground(int x, int y)
424 return (CheckDrawingArea(x, y, 1, 1, gfx.background_bitmap_mask) &&
425 CheckDrawingArea(x, y, 1, 1, gfx.draw_background_mask));
428 inline void BlitBitmap(Bitmap *src_bitmap, Bitmap *dst_bitmap,
429 int src_x, int src_y, int width, int height,
430 int dst_x, int dst_y)
432 if (DrawingDeactivated(dst_x, dst_y, width, height))
435 sysCopyArea(src_bitmap, dst_bitmap, src_x, src_y, width, height,
436 dst_x, dst_y, BLIT_OPAQUE);
439 inline void FillRectangle(Bitmap *bitmap, int x, int y, int width, int height,
442 if (DrawingDeactivated(x, y, width, height))
445 sysFillRectangle(bitmap, x, y, width, height, color);
448 inline void ClearRectangle(Bitmap *bitmap, int x, int y, int width, int height)
450 FillRectangle(bitmap, x, y, width, height, BLACK_PIXEL);
453 inline void ClearRectangleOnBackground(Bitmap *bitmap, int x, int y,
454 int width, int height)
456 if (DrawingOnBackground(x, y))
457 BlitBitmap(gfx.background_bitmap, bitmap, x, y, width, height, x, y);
459 ClearRectangle(bitmap, x, y, width, height);
462 inline void SetClipMask(Bitmap *bitmap, GC clip_gc, Pixmap clip_pixmap)
464 #if defined(TARGET_X11)
467 bitmap->clip_gc = clip_gc;
468 XSetClipMask(display, bitmap->clip_gc, clip_pixmap);
473 inline void SetClipOrigin(Bitmap *bitmap, GC clip_gc, int clip_x, int clip_y)
475 #if defined(TARGET_X11)
478 bitmap->clip_gc = clip_gc;
479 XSetClipOrigin(display, bitmap->clip_gc, clip_x, clip_y);
484 inline void BlitBitmapMasked(Bitmap *src_bitmap, Bitmap *dst_bitmap,
485 int src_x, int src_y,
486 int width, int height,
487 int dst_x, int dst_y)
489 if (DrawingDeactivated(dst_x, dst_y, width, height))
492 sysCopyArea(src_bitmap, dst_bitmap, src_x, src_y, width, height,
493 dst_x, dst_y, BLIT_MASKED);
496 inline void BlitBitmapOnBackground(Bitmap *src_bitmap, Bitmap *dst_bitmap,
497 int src_x, int src_y,
498 int width, int height,
499 int dst_x, int dst_y)
501 if (DrawingOnBackground(dst_x, dst_y))
503 /* draw background */
504 BlitBitmap(gfx.background_bitmap, dst_bitmap, dst_x, dst_y, width, height,
507 /* draw foreground */
508 SetClipOrigin(src_bitmap, src_bitmap->stored_clip_gc,
509 dst_x - src_x, dst_y - src_y);
510 BlitBitmapMasked(src_bitmap, dst_bitmap, src_x, src_y, width, height,
514 BlitBitmap(src_bitmap, dst_bitmap, src_x, src_y, width, height,
518 inline void DrawSimpleBlackLine(Bitmap *bitmap, int from_x, int from_y,
521 #if defined(TARGET_SDL)
522 SDLDrawSimpleLine(bitmap, from_x, from_y, to_x, to_y, BLACK_PIXEL);
524 X11DrawSimpleLine(bitmap, from_x, from_y, to_x, to_y, BLACK_PIXEL);
528 inline void DrawSimpleWhiteLine(Bitmap *bitmap, int from_x, int from_y,
531 #if defined(TARGET_SDL)
532 SDLDrawSimpleLine(bitmap, from_x, from_y, to_x, to_y, WHITE_PIXEL);
534 X11DrawSimpleLine(bitmap, from_x, from_y, to_x, to_y, WHITE_PIXEL);
538 #if !defined(TARGET_X11_NATIVE)
539 inline void DrawLine(Bitmap *bitmap, int from_x, int from_y,
540 int to_x, int to_y, Pixel pixel, int line_width)
544 for (x = 0; x < line_width; x++)
546 for (y = 0; y < line_width; y++)
548 int dx = x - line_width / 2;
549 int dy = y - line_width / 2;
551 if ((x == 0 && y == 0) ||
552 (x == 0 && y == line_width - 1) ||
553 (x == line_width - 1 && y == 0) ||
554 (x == line_width - 1 && y == line_width - 1))
557 #if defined(TARGET_SDL)
559 from_x + dx, from_y + dy, to_x + dx, to_y + dy, pixel);
560 #elif defined(TARGET_ALLEGRO)
561 AllegroDrawLine(bitmap->drawable, from_x + dx, from_y + dy,
562 to_x + dx, to_y + dy, pixel);
569 inline void DrawLines(Bitmap *bitmap, struct XY *points, int num_points,
572 #if !defined(TARGET_X11_NATIVE)
576 for (i = 0; i < num_points - 1; i++)
577 DrawLine(bitmap, points[i].x, points[i].y,
578 points[i + 1].x, points[i + 1].y, pixel, line_width);
581 SDLDrawLines(bitmap->surface, points, num_points, pixel);
584 XSetForeground(display, bitmap->line_gc[1], pixel);
585 XDrawLines(display, bitmap->drawable, bitmap->line_gc[1],
586 (XPoint *)points, num_points, CoordModeOrigin);
590 inline Pixel GetPixel(Bitmap *bitmap, int x, int y)
592 if (x < 0 || x >= bitmap->width ||
593 y < 0 || y >= bitmap->height)
596 #if defined(TARGET_SDL)
597 return SDLGetPixel(bitmap, x, y);
598 #elif defined(TARGET_ALLEGRO)
599 return AllegroGetPixel(bitmap->drawable, x, y);
601 return X11GetPixel(bitmap, x, y);
605 inline Pixel GetPixelFromRGB(Bitmap *bitmap, unsigned int color_r,
606 unsigned int color_g, unsigned int color_b)
608 #if defined(TARGET_SDL)
609 return SDL_MapRGB(bitmap->surface->format, color_r, color_g, color_b);
610 #elif defined(TARGET_ALLEGRO)
611 return AllegroAllocColorCell(color_r << 8, color_g << 8, color_b << 8);
613 return X11GetPixelFromRGB(color_r, color_g, color_b);
617 inline Pixel GetPixelFromRGBcompact(Bitmap *bitmap, unsigned int color)
619 unsigned int color_r = (color >> 16) & 0xff;
620 unsigned int color_g = (color >> 8) & 0xff;
621 unsigned int color_b = (color >> 0) & 0xff;
623 return GetPixelFromRGB(bitmap, color_r, color_g, color_b);
626 /* execute all pending screen drawing operations */
627 inline void FlushDisplay(void)
634 /* execute and wait for all pending screen drawing operations */
635 inline void SyncDisplay(void)
638 XSync(display, FALSE);
642 inline void KeyboardAutoRepeatOn(void)
644 #if defined(TARGET_SDL)
645 SDL_EnableKeyRepeat(SDL_DEFAULT_REPEAT_DELAY / 2,
646 SDL_DEFAULT_REPEAT_INTERVAL / 2);
647 SDL_EnableUNICODE(1);
650 XAutoRepeatOn(display);
654 inline void KeyboardAutoRepeatOff(void)
656 #if defined(TARGET_SDL)
657 SDL_EnableKeyRepeat(0, SDL_DEFAULT_REPEAT_INTERVAL);
658 SDL_EnableUNICODE(0);
661 XAutoRepeatOff(display);
665 inline boolean PointerInWindow(DrawWindow *window)
667 #if defined(TARGET_SDL)
675 /* if XQueryPointer() returns False, the pointer
676 is not on the same screen as the specified window */
677 return XQueryPointer(display, window->drawable, &root, &child,
678 &root_x, &root_y, &win_x, &win_y, &mask);
682 inline boolean SetVideoMode(boolean fullscreen)
684 #if defined(TARGET_SDL)
685 return SDLSetVideoMode(&backbuffer, fullscreen);
687 boolean success = TRUE;
689 if (fullscreen && video.fullscreen_available)
691 Error(ERR_WARN, "fullscreen not available in X11 version");
693 /* display error message only once */
694 video.fullscreen_available = FALSE;
703 inline boolean ChangeVideoModeIfNeeded(boolean fullscreen)
705 #if defined(TARGET_SDL)
706 if ((fullscreen && !video.fullscreen_enabled && video.fullscreen_available)||
707 (!fullscreen && video.fullscreen_enabled))
708 fullscreen = SetVideoMode(fullscreen);
714 Bitmap *LoadImage(char *filename)
718 #if defined(TARGET_SDL)
719 new_bitmap = SDLLoadImage(filename);
721 new_bitmap = X11LoadImage(filename);
725 new_bitmap->source_filename = getStringCopy(filename);
730 Bitmap *LoadCustomImage(char *basename)
732 char *filename = getCustomImageFilename(basename);
735 if (filename == NULL)
736 Error(ERR_EXIT, "LoadCustomImage(): cannot find file '%s'", basename);
738 if ((new_bitmap = LoadImage(filename)) == NULL)
739 Error(ERR_EXIT, "LoadImage() failed: %s", GetError());
744 void ReloadCustomImage(Bitmap *bitmap, char *basename)
746 char *filename = getCustomImageFilename(basename);
749 if (filename == NULL) /* (should never happen) */
751 Error(ERR_WARN, "ReloadCustomImage(): cannot find file '%s'", basename);
755 if (strcmp(filename, bitmap->source_filename) == 0)
757 /* The old and new image are the same (have the same filename and path).
758 This usually means that this image does not exist in this graphic set
759 and a fallback to the existing image is done. */
764 if ((new_bitmap = LoadImage(filename)) == NULL)
766 Error(ERR_WARN, "LoadImage() failed: %s", GetError());
770 if (bitmap->width != new_bitmap->width ||
771 bitmap->height != new_bitmap->height)
773 Error(ERR_WARN, "ReloadCustomImage: new image '%s' has wrong dimensions",
775 FreeBitmap(new_bitmap);
779 TransferBitmapPointers(new_bitmap, bitmap);
783 Bitmap *ZoomBitmap(Bitmap *src_bitmap, int zoom_width, int zoom_height)
785 Bitmap *dst_bitmap = CreateBitmap(zoom_width, zoom_height, DEFAULT_DEPTH);
787 #if defined(TARGET_SDL)
788 SDLZoomBitmap(src_bitmap, dst_bitmap);
790 X11ZoomBitmap(src_bitmap, dst_bitmap);
796 void CreateBitmapWithSmallBitmaps(Bitmap *old_bitmap, int zoom_factor)
799 Bitmap *new_bitmap, *tmp_bitmap_1, *tmp_bitmap_2, *tmp_bitmap_8;
800 int width_1, height_1, width_2, height_2, width_8, height_8;
801 int new_width, new_height;
803 width_1 = old_bitmap->width * zoom_factor;
804 height_1 = old_bitmap->height * zoom_factor;
805 width_2 = width_1 / 2;
806 height_2 = height_1 / 2;
807 width_8 = width_1 / 8;
808 height_8 = height_1 / 8;
810 /* get image with normal size (this might require scaling up) */
811 if (zoom_factor != 1)
812 tmp_bitmap_1 = ZoomBitmap(old_bitmap, width_1, height_1);
814 tmp_bitmap_1 = old_bitmap;
816 /* get image with 1/2 of normal size (for use in the level editor) */
817 if (zoom_factor != 2)
818 tmp_bitmap_2 = ZoomBitmap(tmp_bitmap_1, width_1 / 2, height_1 / 2);
820 tmp_bitmap_2 = old_bitmap;
822 /* get image with 1/8 of normal size (for use on the preview screen) */
823 if (zoom_factor != 8)
824 tmp_bitmap_8 = ZoomBitmap(tmp_bitmap_1, width_1 / 8, height_1 / 8);
826 tmp_bitmap_8 = old_bitmap;
828 /* if image was scaled up, create new clipmask for normal size image */
829 if (zoom_factor != 1)
831 #if defined(TARGET_X11)
832 if (old_bitmap->clip_mask)
833 XFreePixmap(display, old_bitmap->clip_mask);
835 old_bitmap->clip_mask =
836 Pixmap_to_Mask(tmp_bitmap_1->drawable, width_1, height_1);
838 XSetClipMask(display, old_bitmap->stored_clip_gc, old_bitmap->clip_mask);
840 SDL_Surface *tmp_surface_1 = tmp_bitmap_1->surface;
842 if (old_bitmap->surface_masked)
843 SDL_FreeSurface(old_bitmap->surface_masked);
845 SDL_SetColorKey(tmp_surface_1, SDL_SRCCOLORKEY,
846 SDL_MapRGB(tmp_surface_1->format, 0x00, 0x00, 0x00));
847 if ((old_bitmap->surface_masked = SDL_DisplayFormat(tmp_surface_1)) ==NULL)
848 Error(ERR_EXIT, "SDL_DisplayFormat() failed");
849 SDL_SetColorKey(tmp_surface_1, 0, 0); /* reset transparent pixel */
854 new_height = height_1 + (height_1 + 1) / 2; /* prevent odd height */
856 new_bitmap = CreateBitmap(new_width, new_height, DEFAULT_DEPTH);
858 BlitBitmap(tmp_bitmap_1, new_bitmap, 0, 0, width_1, height_1, 0, 0);
859 BlitBitmap(tmp_bitmap_2, new_bitmap, 0, 0, width_1 / 2, height_1 / 2,
861 BlitBitmap(tmp_bitmap_8, new_bitmap, 0, 0, width_1 / 8, height_1 / 8,
862 3 * width_1 / 4, height_1);
864 if (zoom_factor != 1)
865 FreeBitmap(tmp_bitmap_1);
867 if (zoom_factor != 2)
868 FreeBitmap(tmp_bitmap_2);
870 if (zoom_factor != 8)
871 FreeBitmap(tmp_bitmap_8);
873 /* replace image with extended image (containing normal, 1/2 and 1/8 size) */
874 #if defined(TARGET_SDL)
875 swap_bitmap.surface = old_bitmap->surface;
876 old_bitmap->surface = new_bitmap->surface;
877 new_bitmap->surface = swap_bitmap.surface;
879 swap_bitmap.drawable = old_bitmap->drawable;
880 old_bitmap->drawable = new_bitmap->drawable;
881 new_bitmap->drawable = swap_bitmap.drawable;
884 old_bitmap->width = new_bitmap->width;
885 old_bitmap->height = new_bitmap->height;
887 FreeBitmap(new_bitmap);
891 /* ------------------------------------------------------------------------- */
892 /* mouse pointer functions */
893 /* ------------------------------------------------------------------------- */
895 #if !defined(PLATFORM_MSDOS)
897 static const char *cursor_image_playfield[] =
899 /* width height num_colors chars_per_pixel */
908 /* some people complained about a "white dot" on the screen and thought it
909 was a graphical error... OK, let's just remove the whole pointer :-) */
957 #if defined(TARGET_SDL)
958 static const int cursor_bit_order = BIT_ORDER_MSB;
959 #elif defined(TARGET_X11_NATIVE)
960 static const int cursor_bit_order = BIT_ORDER_LSB;
963 static struct MouseCursorInfo *get_cursor_from_image(const char **image)
965 struct MouseCursorInfo *cursor;
966 boolean bit_order_msb = (cursor_bit_order == BIT_ORDER_MSB);
967 int header_lines = 4;
970 cursor = checked_calloc(sizeof(struct MouseCursorInfo));
972 sscanf(image[0], " %d %d ", &cursor->width, &cursor->height);
975 for (y = 0; y < cursor->width; y++)
977 for (x = 0; x < cursor->height; x++)
980 int bit_mask = 0x01 << (bit_order_msb ? 7 - bit_nr : bit_nr );
985 cursor->data[i] = cursor->mask[i] = 0;
988 switch (image[header_lines + y][x])
991 cursor->data[i] |= bit_mask;
992 cursor->mask[i] |= bit_mask;
996 cursor->mask[i] |= bit_mask;
1005 sscanf(image[header_lines + y], "%d,%d", &cursor->hot_x, &cursor->hot_y);
1009 #endif /* !PLATFORM_MSDOS */
1011 void SetMouseCursor(int mode)
1013 #if !defined(PLATFORM_MSDOS)
1014 static struct MouseCursorInfo *cursor_playfield = NULL;
1016 if (cursor_playfield == NULL)
1017 cursor_playfield = get_cursor_from_image(cursor_image_playfield);
1019 #if defined(TARGET_SDL)
1020 SDLSetMouseCursor(mode == CURSOR_PLAYFIELD ? cursor_playfield : NULL);
1021 #elif defined(TARGET_X11_NATIVE)
1022 X11SetMouseCursor(mode == CURSOR_PLAYFIELD ? cursor_playfield : NULL);
1028 /* ========================================================================= */
1029 /* audio functions */
1030 /* ========================================================================= */
1032 inline void OpenAudio(void)
1034 /* always start with reliable default values */
1035 audio.sound_available = FALSE;
1036 audio.music_available = FALSE;
1037 audio.loops_available = FALSE;
1039 audio.sound_enabled = FALSE;
1040 audio.sound_deactivated = FALSE;
1042 audio.mixer_pipe[0] = audio.mixer_pipe[1] = 0;
1043 audio.mixer_pid = 0;
1044 audio.device_name = NULL;
1045 audio.device_fd = -1;
1047 audio.num_channels = 0;
1048 audio.music_channel = 0;
1049 audio.first_sound_channel = 0;
1051 #if defined(TARGET_SDL)
1053 #elif defined(PLATFORM_UNIX)
1055 #elif defined(PLATFORM_MSDOS)
1060 inline void CloseAudio(void)
1062 #if defined(TARGET_SDL)
1064 #elif defined(PLATFORM_UNIX)
1066 #elif defined(PLATFORM_MSDOS)
1070 audio.sound_enabled = FALSE;
1073 inline void SetAudioMode(boolean enabled)
1075 if (!audio.sound_available)
1078 audio.sound_enabled = enabled;
1082 /* ========================================================================= */
1083 /* event functions */
1084 /* ========================================================================= */
1086 inline void InitEventFilter(EventFilter filter_function)
1088 #if defined(TARGET_SDL)
1089 /* set event filter to filter out certain events */
1090 SDL_SetEventFilter(filter_function);
1094 inline boolean PendingEvent(void)
1096 #if defined(TARGET_SDL)
1097 return (SDL_PollEvent(NULL) ? TRUE : FALSE);
1099 return (XPending(display) ? TRUE : FALSE);
1103 inline void NextEvent(Event *event)
1105 #if defined(TARGET_SDL)
1106 SDLNextEvent(event);
1108 XNextEvent(display, event);
1112 inline void PeekEvent(Event *event)
1114 #if defined(TARGET_SDL)
1115 SDL_PeepEvents(event, 1, SDL_PEEKEVENT, SDL_ALLEVENTS);
1117 XPeekEvent(display, event);
1121 inline Key GetEventKey(KeyEvent *event, boolean with_modifiers)
1123 #if defined(TARGET_SDL)
1126 printf("unicode == '%d', sym == '%d', mod == '0x%04x'\n",
1127 (int)event->keysym.unicode,
1128 (int)event->keysym.sym,
1129 (int)SDL_GetModState());
1132 if (with_modifiers &&
1133 event->keysym.unicode > 0x0000 &&
1134 event->keysym.unicode < 0x2000)
1135 return event->keysym.unicode;
1137 return event->keysym.sym;
1142 printf("with modifiers == '0x%04x', without modifiers == '0x%04x'\n",
1143 (int)XLookupKeysym(event, event->state),
1144 (int)XLookupKeysym(event, 0));
1148 return XLookupKeysym(event, event->state);
1150 return XLookupKeysym(event, 0);
1154 inline KeyMod HandleKeyModState(Key key, int key_status)
1156 static KeyMod current_modifiers = KMOD_None;
1158 #if !defined(TARGET_SDL)
1159 if (key != KSYM_UNDEFINED) /* new key => check for modifier key change */
1161 KeyMod new_modifier = KMOD_None;
1166 new_modifier = KMOD_Shift_L;
1169 new_modifier = KMOD_Shift_R;
1171 case KSYM_Control_L:
1172 new_modifier = KMOD_Control_L;
1174 case KSYM_Control_R:
1175 new_modifier = KMOD_Control_R;
1178 new_modifier = KMOD_Meta_L;
1181 new_modifier = KMOD_Meta_R;
1184 new_modifier = KMOD_Alt_L;
1187 new_modifier = KMOD_Alt_R;
1193 if (key_status == KEY_PRESSED)
1194 current_modifiers |= new_modifier;
1196 current_modifiers &= ~new_modifier;
1200 return current_modifiers;
1203 inline KeyMod GetKeyModState()
1205 #if defined(TARGET_SDL)
1206 return (KeyMod)SDL_GetModState();
1208 return HandleKeyModState(KSYM_UNDEFINED, 0);
1212 inline boolean CheckCloseWindowEvent(ClientMessageEvent *event)
1214 if (event->type != EVENT_CLIENTMESSAGE)
1217 #if defined(TARGET_SDL)
1218 return TRUE; /* the only possible message here is SDL_QUIT */
1219 #elif defined(PLATFORM_UNIX)
1220 if ((event->window == window->drawable) &&
1221 (event->data.l[0] == XInternAtom(display, "WM_DELETE_WINDOW", FALSE)))
1229 /* ========================================================================= */
1230 /* joystick functions */
1231 /* ========================================================================= */
1233 inline void InitJoysticks()
1237 #if defined(NO_JOYSTICK)
1238 return; /* joysticks generally deactivated by compile-time directive */
1241 /* always start with reliable default values */
1242 joystick.status = JOYSTICK_NOT_AVAILABLE;
1243 for (i = 0; i < MAX_PLAYERS; i++)
1244 joystick.fd[i] = -1; /* joystick device closed */
1246 #if defined(TARGET_SDL)
1248 #elif defined(PLATFORM_UNIX)
1249 UnixInitJoysticks();
1250 #elif defined(PLATFORM_MSDOS)
1251 MSDOSInitJoysticks();
1255 inline boolean ReadJoystick(int nr, int *x, int *y, boolean *b1, boolean *b2)
1257 #if defined(TARGET_SDL)
1258 return SDLReadJoystick(nr, x, y, b1, b2);
1259 #elif defined(PLATFORM_UNIX)
1260 return UnixReadJoystick(nr, x, y, b1, b2);
1261 #elif defined(PLATFORM_MSDOS)
1262 return MSDOSReadJoystick(nr, x, y, b1, b2);