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 # Simple DirectMedia Layer
19 cflags exec
("sdl-config", "--cflags")
20 ldflags
(exec
("sdl-config", "--libs"), "-lSDL_image -lSDL_ttf")
29 #include <SDL/SDL_syswm.h>
30 #include <SDL/SDL_image.h>
31 #include <SDL/SDL_ttf.h>
34 # Represent a screen surface
35 extern class SDLDisplay `{SDL_Surface *`}
38 redef type I: SDLImage
40 # Initialize a surface with width and height
41 new (w, h: Int) import enable_mouse_motion_events `{
42 SDL_Init(SDL_INIT_VIDEO);
45 printf
("TTF_Init: %s\n", TTF_GetError());
49 SDL_Surface *self = SDL_SetVideoMode(w
, h
, 24, SDL_HWSURFACE);
51 if (!SDLDisplay_enable_mouse_motion_events(self)) {
52 /* ignores mousemotion
for performance reasons
*/
53 SDL_EventState(SDL_MOUSEMOTION, SDL_IGNORE);
59 # Indicates wether we want the SDL mouse motion event (or only clicks).
60 # Disabled by defaut for performance reason. To activate, redef this method
62 fun enable_mouse_motion_events: Bool do return false
66 if (SDL_WasInit(SDL_INIT_VIDEO))
73 redef fun finish `{ SDL_Flip(self); `}
75 # Clear the entire window with given RGB color (integer values)
76 fun clear_int
(r
, g
, b
: Int) `{
77 SDL_FillRect(self, NULL, SDL_MapRGB(self->format,r,g,b));
80 redef fun width
`{ return self->w; `}
81 redef fun height `{ return self->h; `}
83 # Fill a rectangle with given color
84 fun fill_rect
(rect
: SDLRectangle, r
, g
, b
: Int) `{
85 SDL_FillRect(self, rect, SDL_MapRGB(self->format,r,g,b));
88 redef fun clear
(r
, g
, b
) `{
93 SDL_FillRect(self, NULL, SDL_MapRGB(self->format,ri,gi,bi));
96 # SDL events since the last call to this method
97 fun events
: Sequence[SDLInputEvent]
99 var events
= new Array[SDLInputEvent]
101 var new_event
= poll_event
102 if new_event
== null then break
108 private fun poll_event
: nullable SDLInputEvent
109 import new_key_event
, new_mouse_motion_event
, new_mouse_button_event
, new_quit_event
`{
113 if (SDL_PollEvent(&event))
115 switch (event.type) {
118 return SDLDisplay_new_key_event(self,
119 SDL_GetKeyName(event.key.keysym.sym),
120 event.type==SDL_KEYDOWN);
122 case SDL_MOUSEMOTION:
123 return SDLDisplay_new_mouse_motion_event(self,
124 event.motion.x, event.motion.y,
125 event.motion.xrel, event.motion.yrel,
126 SDL_GetMouseState(NULL, NULL)&SDL_BUTTON(1));
128 case SDL_MOUSEBUTTONDOWN:
129 case SDL_MOUSEBUTTONUP:
130 return SDLDisplay_new_mouse_button_event(self,
131 event.button.x, event.button.y,
133 event.type == SDL_MOUSEBUTTONDOWN);
136 return SDLDisplay_new_quit_event(self);
140 return null_SDLInputEvent();
143 private fun new_key_event
(name
: CString, down
: Bool): nullable SDLInputEvent
144 do return new SDLKeyEvent(name
.to_s
, down
)
146 private fun new_mouse_motion_event
(x
, y
, xr
, yr
: Float, down
: Bool): nullable SDLInputEvent
147 do return new SDLMouseMotionEvent(x
, y
, xr
, yr
, down
)
149 private fun new_mouse_button_event
(x
, y
: Float, id
: Int, down
: Bool): nullable SDLInputEvent
150 do return new SDLMouseButtonEvent(x
, y
, id
, down
)
152 private fun new_quit_event
: nullable SDLInputEvent
153 do return new SDLQuitEvent
155 # Set the position of the cursor to x,y
156 fun warp_mouse
(x
,y
: Int) `{ SDL_WarpMouse(x, y); `}
158 # Show or hide the cursor
159 fun show_cursor=(val: Bool) `{ SDL_ShowCursor(val? SDL_ENABLE: SDL_DISABLE); `}
161 # Is the cursor visible?
162 fun show_cursor
: Bool `{ return SDL_ShowCursor(SDL_QUERY); `}
164 # Grab or release the input
165 fun grab_input=(val: Bool) `{ SDL_WM_GrabInput(val? SDL_GRAB_ON: SDL_GRAB_OFF); `}
167 # Is the input grabbed?
168 fun grab_input
: Bool `{ return SDL_WM_GrabInput(SDL_GRAB_QUERY) == SDL_GRAB_ON; `}
170 # Are instances of `SDLMouseMotionEvent` ignored?
171 fun ignore_mouse_motion_events: Bool `{
172 return SDL_EventState(SDL_MOUSEMOTION, SDL_QUERY);
175 # Do not raise instances of `SDLMouseMotionEvent` if `val
`
176 fun ignore_mouse_motion_events=(val: Bool) `{
177 SDL_EventState(SDL_MOUSEMOTION, val
? SDL_IGNORE: SDL_ENABLE);
180 # Does `self` has the mouse focus?
181 fun mouse_focus: Bool `{ return SDL_GetAppState() & SDL_APPMOUSEFOCUS; `}
183 # Does `self` has the input focus?
184 fun input_focus
: Bool `{ return SDL_GetAppState() & SDL_APPINPUTFOCUS; `}
187 # Basic Drawing figures
188 extern class SDLDrawable `{SDL_Surface*`}
191 redef type I
: SDLImage
193 redef fun blit
(img
, x
, y
) do native_blit
(img
, x
.to_i
, y
.to_i
)
194 private fun native_blit
(img
: I
, x
, y
: Int) `{
201 SDL_BlitSurface(img, NULL, self, &dst);
204 redef fun blit_centered
(img
, x
, y
)
206 x
= x
- img
.width
/ 2
207 y
= y
- img
.height
/ 2
213 extern class SDLImage
217 # Import image from a file
218 new from_file
(path
: String) import String.to_cstring
`{
219 SDL_Surface *image = IMG_Load(String_to_cstring(path));
223 # Copy of an existing SDLImage
224 new copy_of
(image
: SDLImage) `{
225 SDL_Surface *new_image = SDL_CreateRGBSurface(
226 image->flags, image->w, image->h, 24,
234 SDL_BlitSurface(image, NULL, new_image, &dst);
239 # Save the image into the specified file
240 fun save_to_file
(path
: String) import String.to_cstring
`{ `}
242 # Destroy the image and free the memory
243 redef fun destroy `{ SDL_FreeSurface(self); `}
245 redef fun width
`{ return self->w; `}
246 redef fun height `{ return self->h; `}
248 fun is_ok
: Bool do return not address_is_null
250 # Returns a reference to the pixels of the texture
251 fun pixels
: NativeCByteArray `{ return self->pixels; `}
253 # Mask for the alpha value of each pixel
254 fun amask: Int `{ return self->format->Amask; `}
258 extern class SDLRectangle `{SDL_Rect*`}
259 # Constructor with x,y positions width and height of the rectangle
260 new (x: Int, y: Int, w: Int, h: Int) `{
261 SDL_Rect *rect
= malloc
(sizeof
(SDL_Rect));
269 fun x=(v: Int) `{ self->x = (Sint16)v; `}
270 fun x
: Int `{ return self->x; `}
272 fun y=(v: Int) `{ self->y = (Sint16)v; `}
273 fun y
: Int `{ return self->y; `}
275 fun w=(v: Int) `{ self->w = (Uint16)v; `}
276 fun w
: Int `{ return self->w; `}
278 fun h=(v: Int) `{ self->h = (Uint16)v; `}
279 fun h
: Int `{ return self->h; `}
282 interface SDLInputEvent
286 # MouseEvent class containing the cursor position
294 redef fun is_move do return false
297 # MouseButtonEvent used to get information when a button is pressed/depressed
298 class SDLMouseButtonEvent
305 # Is this event raised by the left button?
306 fun is_left_button: Bool do return button == 1
308 # Is this event raised by the right button?
309 fun is_right_button: Bool do return button == 3
311 # Is this event raised by the middle button?
312 fun is_middle_button: Bool do return button == 2
314 # Is this event raised by the wheel going down?
315 fun is_down_wheel: Bool do return button == 4
317 # Is this event raised by the wheel going up?
318 fun is_up_wheel: Bool do return button == 5
320 # Is this event raised by the wheel?
321 fun is_wheel: Bool do return is_down_wheel or is_up_wheel
323 init (x, y: Float, button: Int, pressed: Bool)
328 self.pressed = pressed
334 return "MouseButtonEvent button {button} down at {x}, {y}"
336 return "MouseButtonEvent button {button} up at {x}, {y}"
341 # MouseMotionEvent to get the cursor position when the mouse is moved
342 class SDLMouseMotionEvent
350 redef fun is_move do return true
352 init (x, y, rel_x, rel_y: Float, pressed: Bool)
358 self.pressed = pressed
361 redef fun to_s do return "MouseMotionEvent at {x}, {y}"
364 # SDLKeyEvent for when a key is pressed
375 if name.length == 1 then return name.chars.first
382 return "KeyboardEvent key {name} down"
384 return "KeyboardEvent key {name} up"
388 # Return true if the key is down, false otherwise
389 redef fun is_down do return down
391 # Return true if the key is the up arrow
392 redef fun is_arrow_up do return name == "up"
394 # Return true if the key is the left arrow
395 redef fun is_arrow_left do return name == "left"
397 # Return true if the key is the down arrow
398 redef fun is_arrow_down do return name == "down"
400 # Return true if the key is the right arrow
401 redef fun is_arrow_right do return name == "right"
410 fun delay `{ SDL_Delay(self); `}
413 # Class to load and use TTF_Font
414 extern class SDLFont `{TTF_Font *`}
415 # Load a font with a specified name and size
416 new (name: String, points: Int) import String.to_cstring `{
417 char
* cname
= String_to_cstring(name
);
419 TTF_Font *font
= TTF_OpenFont(cname
, (int
)points
);
421 printf
("TTF_OpenFont: %s\n", TTF_GetError());
428 fun destroy `{ TTF_CloseFont(self); `}
430 # Create a String with the specified color, return an SDLImage
431 fun render
(text
: String, r
, g
, b
: Int): SDLImage import String.to_cstring
`{
433 SDL_Surface *text_surface;
440 ctext = String_to_cstring(text);
441 if(!(text_surface=TTF_RenderText_Blended(self, ctext, color)))
443 fprintf(stderr, "SDL TFF error: %s\n", TTF_GetError());
450 # TODO reactivate fun below when updating libsdl_ttf to 2.0.10 or above
451 #fun outline: Int # TODO check to make inline/nitside only
452 #fun outline=(v: Int) is extern
454 #fun kerning: Bool is extern
455 #fun kerning=(v: Bool) is extern
457 # Maximum pixel height of all glyphs of this font.
459 return TTF_FontHeight(self);
463 return TTF_FontAscent(self);
467 return TTF_FontDescent(self);
470 # Get the recommended pixel height of a rendered line of text of the loaded font. This is usually larger than the Font.height.
471 fun line_skip
: Int `{
472 return TTF_FontLineSkip(self);
475 # Return true is the font used fixed width for each char
476 fun is_fixed_width
: Bool `{
477 return TTF_FontFaceIsFixedWidth(self);
480 # Return the family name of the font
481 fun family_name
: nullable String import String.to_cstring
, String.as nullable `{
482 char *fn = TTF_FontFaceFamilyName(self);
485 return null_String();
487 return String_as_nullable(CString_to_s(fn));
490 # Return the style name of the font
491 fun style_name
: nullable String import String.to_cstring
, String.as nullable `{
492 char *sn = TTF_FontFaceStyleName(self);
495 return null_String();
497 return String_as_nullable(CString_to_s(sn));
500 # Return the estimated width of a String if used with the current font
501 fun width_of
(text
: String): Int import CString.to_s
`{
502 char *ctext = String_to_cstring(text);
504 if (TTF_SizeText(self, ctext, &w, NULL))
506 fprintf(stderr, "SDL TFF error: %s\n", TTF_GetError());
514 # Information on the SDL window
515 # Used in other modules to get window handle
516 extern class SDLSystemWindowManagerInfo `{SDL_SysWMinfo *`}
519 SDL_SysWMinfo *val
= malloc
(sizeof
(SDL_SysWMinfo));
521 SDL_VERSION(&val-
>version
);
523 if(SDL_GetWMInfo(val
) <= 0) {
524 printf
("Unable to get window handle");
531 # Returns the handle of this window on a X11 window system
532 fun x11_window_handle: Pointer `{
533 return (void
*)self-
>info
.x11
.window
;