1 # This file is part of NIT ( http://www.nitlanguage.org ).
3 # Copyright 2011-2013 Alexis Laferrière <alexis.laf@xymus.net>
5 # Licensed under the Apache License, Version 2.0 (the "License");
6 # you may not use this file except in compliance with the License.
7 # You may obtain a copy of the License at
9 # http://www.apache.org/licenses/LICENSE-2.0
11 # Unless required by applicable law or agreed to in writing, software
12 # distributed under the License is distributed on an "AS IS" BASIS,
13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 # See the License for the specific language governing permissions and
15 # limitations under the License.
17 # SDL display support (used in Linux for windows and inputes only)
19 c_compiler_option
(exec
("sdl-config", "--cflags"))
20 c_linker_option
(exec
("sdl-config", "--libs"), "-lSDL_image -lSDL_ttf")
28 #include <SDL/SDL_syswm.h>
29 #include <SDL/SDL_image.h>
30 #include <SDL/SDL_ttf.h>
33 # Represent a screen surface
34 extern class SDLDisplay `{SDL_Surface *`}
37 redef type I: SDLImage
39 # Initialize a surface with width and height
40 new (w, h: Int) import enable_mouse_motion_events `{
41 SDL_Init(SDL_INIT_VIDEO);
44 printf
("TTF_Init: %s\n", TTF_GetError());
48 SDL_Surface *self = SDL_SetVideoMode(w
, h
, 24, SDL_HWSURFACE);
50 if (!SDLDisplay_enable_mouse_motion_events(self)) {
51 /* ignores mousemotion
for performance reasons
*/
52 SDL_EventState(SDL_MOUSEMOTION, SDL_IGNORE);
58 # Indicates wether we want the SDL mouse motion event (or only clicks).
59 # Disabled by defaut for performance reason. To activate, redef this method
61 fun enable_mouse_motion_events: Bool do return false
65 if (SDL_WasInit(SDL_INIT_VIDEO))
72 redef fun finish `{ SDL_Flip(recv); `}
74 # Clear the entire window with given RGB color (integer values)
75 fun clear_int
(r
, g
, b
: Int) `{
76 SDL_FillRect(recv, NULL, SDL_MapRGB(recv->format,r,g,b));
79 redef fun width
: Int `{ return recv->w; `}
80 redef fun height: Int `{ return recv->h; `}
82 # Fill a rectangle with given color
83 fun fill_rect
(rect
: SDLRectangle, r
, g
, b
: Int) `{
84 SDL_FillRect(recv, rect, SDL_MapRGB(recv->format,r,g,b));
87 redef fun clear
(r
, g
, b
: Float) `{
92 SDL_FillRect(recv, NULL, SDL_MapRGB(recv->format,ri,gi,bi));
95 fun events
: Sequence[SDLInputEvent]
97 var new_event
: nullable Object = null
98 var events
= new List[SDLInputEvent]
100 new_event
= poll_event
101 if new_event
!= null then # new_event isa Event then #
102 events
.add
(new_event
)
110 private fun poll_event
: nullable SDLInputEvent import SDLKeyEvent, SDLMouseButtonEvent, SDLMouseMotionEvent, SDLQuitEvent, NativeString.to_s
, SDLMouseButtonEvent.as(nullable SDLInputEvent), SDLMouseMotionEvent.as(nullable SDLInputEvent), SDLKeyEvent.as(nullable SDLInputEvent), SDLQuitEvent.as(nullable SDLInputEvent) `{
115 if (SDL_PollEvent(&event))
117 switch (event.type) {
121 printf("The \"%s\" key was pressed!\n",
122 SDL_GetKeyName(event.key.keysym.sym));
125 return SDLKeyEvent_as_nullable_SDLInputEvent(
126 new_SDLKeyEvent(NativeString_to_s(
127 SDL_GetKeyName(event.key.keysym.sym)),
128 event.type==SDL_KEYDOWN));
130 case SDL_MOUSEMOTION:
132 printf("Mouse moved by %d,%d to (%d,%d)\n",
133 event.motion.xrel, event.motion.yrel,
134 event.motion.x, event.motion.y);
137 return SDLMouseMotionEvent_as_nullable_SDLInputEvent(
138 new_SDLMouseMotionEvent(event.motion.x, event.motion.y,
139 event.motion.xrel, event.motion.yrel, SDL_GetMouseState(NULL, NULL)&SDL_BUTTON(1)));
141 case SDL_MOUSEBUTTONDOWN:
142 case SDL_MOUSEBUTTONUP:
144 printf("Mouse button \"%d\" pressed at (%d,%d)\n",
145 event.button.button, event.button.x, event.button.y);
147 return SDLMouseButtonEvent_as_nullable_SDLInputEvent(
148 new_SDLMouseButtonEvent(event.button.x, event.button.y,
149 event.button.button, event.type == SDL_MOUSEBUTTONDOWN));
153 printf("Quit event\n");
155 return SDLQuitEvent_as_nullable_SDLInputEvent(new_SDLQuitEvent());
159 return null_SDLInputEvent();
162 # Set the position of the cursor to x,y
163 fun warp_mouse
(x
,y
: Int) `{ SDL_WarpMouse(x, y); `}
165 # Show or hide the cursor
166 fun show_cursor(show: Bool) `{ SDL_ShowCursor(show); `}
169 # Basic Drawing figures
170 extern class SDLDrawable `{SDL_Surface*`}
173 redef type I: SDLImage
175 redef fun blit(img, x, y) `{
182 SDL_BlitSurface(img
, NULL, recv
, &dst
);
185 redef fun blit_centered(img, x, y)
187 x = x - img.width / 2
188 y = y - img.height / 2
194 extern class SDLImage
198 # Import image from a file
199 new from_file(path: String) import String.to_cstring `{
200 SDL_Surface *image
= IMG_Load(String_to_cstring(path
));
204 # Copy of an existing SDLImage
205 new copy_of(image: SDLImage) `{
206 SDL_Surface *new_image
= SDL_CreateRGBSurface(
207 image-
>flags
, image-
>w
, image-
>h
, 24,
215 SDL_BlitSurface(image
, NULL, new_image
, &dst
);
220 # Save the image into the specified file
221 fun save_to_file(path: String) import String.to_cstring `{ `}
223 # Destroy the image and free the memory
224 redef fun destroy
`{ SDL_FreeSurface(recv); `}
226 redef fun width: Int `{ return recv->w; `}
227 redef fun height
: Int `{ return recv->h; `}
229 fun is_ok: Bool do return not address_is_null
233 extern class SDLRectangle `{SDL_Rect*`}
234 # Constructor with x,y positions width and height of the rectangle
235 new (x
: Int, y
: Int, w
: Int, h
: Int) `{
236 SDL_Rect *rect = malloc(sizeof(SDL_Rect));
244 fun x
=(v
: Int) `{ recv->x = (Sint16)v; `}
245 fun x: Int `{ return recv->x; `}
247 fun y
=(v
: Int) `{ recv->y = (Sint16)v; `}
248 fun y: Int `{ return recv->y; `}
250 fun w
=(v
: Int) `{ recv->w = (Uint16)v; `}
251 fun w: Int `{ return recv->w; `}
253 fun h
=(v
: Int) `{ recv->h = (Uint16)v; `}
254 fun h: Int `{ return recv->h; `}
257 interface SDLInputEvent
261 # MouseEvent class containing the cursor position
269 private init (x
, y
: Float)
276 # MouseButtonEvent used to get information when a button is pressed/depressed
277 class SDLMouseButtonEvent
282 redef var pressed
: Bool
283 redef fun depressed
: Bool do return not pressed
285 init (x
, y
: Float, button
: Int, pressed
: Bool)
290 self.pressed
= pressed
296 return "MouseButtonEvent button {button} down at {x}, {y}"
298 return "MouseButtonEvent button {button} up at {x}, {y}"
303 # MouseMotionEvent to get the cursor position when the mouse is moved
304 class SDLMouseMotionEvent
310 redef var pressed
: Bool
311 redef fun depressed
: Bool do return not pressed
313 init (x
, y
, rel_x
, rel_y
: Float, pressed
: Bool)
319 self.pressed
= pressed
322 redef fun to_s
do return "MouseMotionEvent at {x}, {y}"
325 # SDLKeyEvent for when a key is pressed
333 init (key_name
: String, down
: Bool)
335 self.key_name
= key_name
339 redef fun to_c
: nullable Char
341 if key_name
.length
== 1 then return key_name
.chars
.first
348 return "KeyboardEvent key {key_name} down"
350 return "KeyboardEvent key {key_name} up"
354 # Return true if the key is down, false otherwise
355 redef fun is_down
do return down
357 # Return true if the key is the up arrow
358 redef fun is_arrow_up
do return key_name
== "up"
359 # Return true if the key is the left arrow
360 redef fun is_arrow_left
do return key_name
== "left"
361 # Return true if the key is the down arrow
362 redef fun is_arrow_down
do return key_name
== "down"
363 # Return true if the key is the right arrow
364 redef fun is_arrow_right
do return key_name
== "right"
373 fun delay
`{ SDL_Delay(recv); `}
376 # Class to load and use TTF_Font
377 extern class SDLFont `{TTF_Font *`}
378 # Load a font with a specified name and size
379 new (name
: String, points
: Int) import String.to_cstring
`{
380 char * cname = String_to_cstring(name);
382 TTF_Font *font = TTF_OpenFont(cname, (int)points);
384 printf("TTF_OpenFont: %s\n", TTF_GetError());
391 fun destroy
`{ TTF_CloseFont(recv); `}
393 # Create a String with the specified color, return an SDLImage
394 fun render(text: String, r, g, b: Int): SDLImage import String.to_cstring `{
396 SDL_Surface *text_surface
;
403 ctext
= String_to_cstring(text
);
404 if(!(text_surface
=TTF_RenderText_Blended(recv
, ctext
, color
)))
406 fprintf
(stderr
, "SDL TFF error: %s\n", TTF_GetError());
413 # TODO reactivate fun below when updating libsdl_ttf to 2.0.10 or above
414 #fun outline: Int # TODO check to make inline/nitside only
415 #fun outline=(v: Int) is extern
417 #fun kerning: Bool is extern
418 #fun kerning=(v: Bool) is extern
420 # Maximum pixel height of all glyphs of this font.
422 return TTF_FontHeight(recv
);
426 return TTF_FontAscent(recv
);
430 return TTF_FontDescent(recv
);
433 # Get the recommended pixel height of a rendered line of text of the loaded font. This is usually larger than the Font.height.
434 fun line_skip: Int `{
435 return TTF_FontLineSkip(recv
);
438 # Return true is the font used fixed width for each char
439 fun is_fixed_width: Bool `{
440 return TTF_FontFaceIsFixedWidth(recv
);
443 # Return the family name of the font
444 fun family_name: nullable String import String.to_cstring, String.as nullable `{
445 char
*fn
= TTF_FontFaceFamilyName(recv
);
448 return null_String
();
450 return String_as_nullable(NativeString_to_s(fn
));
453 # Return the style name of the font
454 fun style_name: nullable String import String.to_cstring, String.as nullable `{
455 char
*sn
= TTF_FontFaceStyleName(recv
);
458 return null_String
();
460 return String_as_nullable(NativeString_to_s(sn
));
463 # Return the estimated width of a String if used with the current font
464 fun width_of(text: String): Int import NativeString.to_s `{
465 char
*ctext
= String_to_cstring(text
);
467 if (TTF_SizeText(recv
, ctext
, &w
, NULL))
469 fprintf
(stderr
, "SDL TFF error: %s\n", TTF_GetError());
477 # Information on the SDL window
478 # Used in other modules to get window handle
479 extern class SDLSystemWindowManagerInfo `{SDL_SysWMinfo *`}
482 SDL_SysWMinfo *val = malloc(sizeof(SDL_SysWMinfo));
484 SDL_VERSION(&val->version);
486 if(SDL_GetWMInfo(val) <= 0) {
487 printf("Unable to get window handle");
494 # Returns the handle of this window on a X11 window system
495 fun x11_window_handle
: Pointer `{
496 return (void*)recv->info.x11.window;