SDL  2.0
SDL_emscriptenmouse.c
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1 /*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
4 
5  This software is provided 'as-is', without any express or implied
6  warranty. In no event will the authors be held liable for any damages
7  arising from the use of this software.
8 
9  Permission is granted to anyone to use this software for any purpose,
10  including commercial applications, and to alter it and redistribute it
11  freely, subject to the following restrictions:
12 
13  1. The origin of this software must not be misrepresented; you must not
14  claim that you wrote the original software. If you use this software
15  in a product, an acknowledgment in the product documentation would be
16  appreciated but is not required.
17  2. Altered source versions must be plainly marked as such, and must not be
18  misrepresented as being the original software.
19  3. This notice may not be removed or altered from any source distribution.
20 */
21 
22 
23 #include "../../SDL_internal.h"
24 
25 #if SDL_VIDEO_DRIVER_EMSCRIPTEN
26 
27 #include <emscripten/emscripten.h>
28 #include <emscripten/html5.h>
29 
30 #include "SDL_emscriptenmouse.h"
31 
32 #include "../../events/SDL_mouse_c.h"
33 #include "SDL_assert.h"
34 
35 
36 static SDL_Cursor*
37 Emscripten_CreateDefaultCursor()
38 {
40  Emscripten_CursorData *curdata;
41 
42  cursor = SDL_calloc(1, sizeof(SDL_Cursor));
43  if (cursor) {
44  curdata = (Emscripten_CursorData *) SDL_calloc(1, sizeof(*curdata));
45  if (!curdata) {
47  SDL_free(cursor);
48  return NULL;
49  }
50 
51  curdata->system_cursor = "default";
52  cursor->driverdata = curdata;
53  }
54  else {
56  }
57 
58  return cursor;
59 }
60 
61 /*
62 static SDL_Cursor*
63 Emscripten_CreateCursor(SDL_Surface* sruface, int hot_x, int hot_y)
64 {
65  return Emscripten_CreateDefaultCursor();
66 }
67 */
68 
69 static SDL_Cursor*
70 Emscripten_CreateSystemCursor(SDL_SystemCursor id)
71 {
73  Emscripten_CursorData *curdata;
74  const char *cursor_name = NULL;
75 
76  switch(id) {
78  cursor_name = "default";
79  break;
81  cursor_name = "text";
82  break;
84  cursor_name = "wait";
85  break;
87  cursor_name = "crosshair";
88  break;
90  cursor_name = "progress";
91  break;
93  cursor_name = "nwse-resize";
94  break;
96  cursor_name = "nesw-resize";
97  break;
99  cursor_name = "ew-resize";
100  break;
102  cursor_name = "ns-resize";
103  break;
105  break;
107  cursor_name = "not-allowed";
108  break;
110  cursor_name = "pointer";
111  break;
112  default:
113  SDL_assert(0);
114  return NULL;
115  }
116 
117  cursor = (SDL_Cursor *) SDL_calloc(1, sizeof(*cursor));
118  if (!cursor) {
119  SDL_OutOfMemory();
120  return NULL;
121  }
122  curdata = (Emscripten_CursorData *) SDL_calloc(1, sizeof(*curdata));
123  if (!curdata) {
124  SDL_OutOfMemory();
125  SDL_free(cursor);
126  return NULL;
127  }
128 
129  curdata->system_cursor = cursor_name;
130  cursor->driverdata = curdata;
131 
132  return cursor;
133 }
134 
135 static void
136 Emscripten_FreeCursor(SDL_Cursor* cursor)
137 {
138  Emscripten_CursorData *curdata;
139  if (cursor) {
140  curdata = (Emscripten_CursorData *) cursor->driverdata;
141 
142  if (curdata != NULL) {
143  SDL_free(cursor->driverdata);
144  }
145 
146  SDL_free(cursor);
147  }
148 }
149 
150 static int
151 Emscripten_ShowCursor(SDL_Cursor* cursor)
152 {
153  Emscripten_CursorData *curdata;
154  if (SDL_GetMouseFocus() != NULL) {
155  if(cursor && cursor->driverdata) {
156  curdata = (Emscripten_CursorData *) cursor->driverdata;
157 
158  if(curdata->system_cursor) {
159  EM_ASM_INT({
160  if (Module['canvas']) {
161  Module['canvas'].style['cursor'] = Module['Pointer_stringify']($0);
162  }
163  return 0;
164  }, curdata->system_cursor);
165  }
166  }
167  else {
168  EM_ASM(
169  if (Module['canvas']) {
170  Module['canvas'].style['cursor'] = 'none';
171  }
172  );
173  }
174  }
175  return 0;
176 }
177 
178 static void
179 Emscripten_WarpMouse(SDL_Window* window, int x, int y)
180 {
181  SDL_Unsupported();
182 }
183 
184 static int
185 Emscripten_SetRelativeMouseMode(SDL_bool enabled)
186 {
187  /* TODO: pointer lock isn't actually enabled yet */
188  if(enabled) {
189  if(emscripten_request_pointerlock(NULL, 1) >= EMSCRIPTEN_RESULT_SUCCESS) {
190  return 0;
191  }
192  } else {
193  if(emscripten_exit_pointerlock() >= EMSCRIPTEN_RESULT_SUCCESS) {
194  return 0;
195  }
196  }
197  return -1;
198 }
199 
200 void
202 {
203  SDL_Mouse* mouse = SDL_GetMouse();
204 
205 /*
206  mouse->CreateCursor = Emscripten_CreateCursor;
207 */
208  mouse->ShowCursor = Emscripten_ShowCursor;
209  mouse->FreeCursor = Emscripten_FreeCursor;
210  mouse->WarpMouse = Emscripten_WarpMouse;
211  mouse->CreateSystemCursor = Emscripten_CreateSystemCursor;
212  mouse->SetRelativeMouseMode = Emscripten_SetRelativeMouseMode;
213 
214  SDL_SetDefaultCursor(Emscripten_CreateDefaultCursor());
215 }
216 
217 void
219 {
220  SDL_Mouse* mouse = SDL_GetMouse();
221 
222  Emscripten_FreeCursor(mouse->def_cursor);
223  mouse->def_cursor = NULL;
224 
225  mouse->CreateCursor = NULL;
226  mouse->ShowCursor = NULL;
227  mouse->FreeCursor = NULL;
228  mouse->WarpMouse = NULL;
229  mouse->CreateSystemCursor = NULL;
230  mouse->SetRelativeMouseMode = NULL;
231 }
232 
233 #endif /* SDL_VIDEO_DRIVER_EMSCRIPTEN */
234 
235 /* vi: set ts=4 sw=4 expandtab: */
236 
SDL_Mouse * SDL_GetMouse(void)
Definition: SDL_mouse.c:66
int(* ShowCursor)(SDL_Cursor *cursor)
Definition: SDL_mouse_c.h:52
GLint GLint GLint GLint GLint x
Definition: SDL_opengl.h:1567
int(* SetRelativeMouseMode)(SDL_bool enabled)
Definition: SDL_mouse_c.h:67
void Emscripten_FiniMouse()
static SDL_Window * window
set set set set set set set macro pixldst1 abits if abits op else op endif endm macro pixldst2 abits if abits op else op endif endm macro pixldst4 abits if abits op else op endif endm macro pixldst0 abits op endm macro pixldst3 mem_operand op endm macro pixldst30 mem_operand op endm macro pixldst abits if abits elseif abits elseif abits elseif abits elseif abits pixldst0 abits else pixldst0 abits pixldst0 abits pixldst0 abits pixldst0 abits endif elseif abits else pixldst0 abits pixldst0 abits endif elseif abits else error unsupported bpp *numpix else pixst endif endm macro pixld1_s mem_operand if asr adds SRC_WIDTH_FIXED bpl add asl mov asr adds SRC_WIDTH_FIXED bpl add asl mov asr adds SRC_WIDTH_FIXED bpl add asl mov asr adds SRC_WIDTH_FIXED bpl add asl elseif asr adds SRC_WIDTH_FIXED bpl add asl mov asr adds SRC_WIDTH_FIXED bpl add asl else error unsupported endif endm macro pixld2_s mem_operand if mov asr add asl add asl mov asr sub UNIT_X add asl mov asr add asl add asl mov asr add UNIT_X add asl else pixld1_s mem_operand pixld1_s mem_operand endif endm macro pixld0_s mem_operand if asr adds SRC_WIDTH_FIXED bpl add asl elseif asr adds SRC_WIDTH_FIXED bpl add asl endif endm macro pixld_s_internal mem_operand if mem_operand pixld2_s mem_operand pixdeinterleave basereg elseif mem_operand elseif mem_operand elseif mem_operand elseif mem_operand pixld0_s mem_operand else pixld0_s mem_operand pixld0_s mem_operand pixld0_s mem_operand pixld0_s mem_operand endif elseif mem_operand else pixld0_s mem_operand pixld0_s mem_operand endif elseif mem_operand else error unsupported mem_operand if bpp mem_operand endif endm macro vuzp8 reg2 vuzp d d &reg2 endm macro vzip8 reg2 vzip d d &reg2 endm macro pixdeinterleave basereg basereg basereg basereg basereg endif endm macro pixinterleave basereg basereg basereg basereg basereg endif endm macro PF boost_increment endif if endif PF tst PF addne PF subne PF cmp ORIG_W if endif if endif if endif PF subge ORIG_W PF subges if endif if endif if endif endif endm macro cache_preload_simple endif if dst_r_bpp pld [DST_R, #(PREFETCH_DISTANCE_SIMPLE *dst_r_bpp/8)] endif if mask_bpp pld if[MASK, #(PREFETCH_DISTANCE_SIMPLE *mask_bpp/8)] endif endif endm macro fetch_mask_pixblock pixld mask_basereg pixblock_size MASK endm macro ensure_destination_ptr_alignment process_pixblock_tail_head if beq irp local skip1(dst_w_bpp<=(lowbit *8)) &&((lowbit *8)<(pixblock_size *dst_w_bpp)) .if lowbit< 16 tst DST_R
SDL_Cursor *(* CreateCursor)(SDL_Surface *surface, int hot_x, int hot_y)
Definition: SDL_mouse_c.h:46
void * SDL_calloc(size_t nmemb, size_t size)
GLint GLint GLint GLint GLint GLint y
Definition: SDL_opengl.h:1567
void SDL_free(void *mem)
SDL_SystemCursor
Cursor types for SDL_CreateSystemCursor().
Definition: SDL_mouse.h:46
void SDL_SetDefaultCursor(SDL_Cursor *cursor)
Definition: SDL_mouse.c:55
GLenum GLenum GLsizei const GLuint GLboolean enabled
SDL_Cursor * cursor
void(* FreeCursor)(SDL_Cursor *cursor)
Definition: SDL_mouse_c.h:58
#define SDL_assert(condition)
Definition: SDL_assert.h:167
#define NULL
Definition: begin_code.h:143
#define SDL_OutOfMemory()
Definition: SDL_error.h:52
SDL_bool
Definition: SDL_stdinc.h:130
#define SDL_GetMouseFocus
The type used to identify a window.
Definition: SDL_sysvideo.h:71
void(* WarpMouse)(SDL_Window *window, int x, int y)
Definition: SDL_mouse_c.h:61
SDL_Cursor *(* CreateSystemCursor)(SDL_SystemCursor id)
Definition: SDL_mouse_c.h:49
void * driverdata
Definition: SDL_mouse_c.h:33
#define SDL_Unsupported()
Definition: SDL_error.h:53
void Emscripten_InitMouse()
SDL_Cursor * def_cursor
Definition: SDL_mouse_c.h:92