1 /*
2 Simple DirectMedia Layer
3 Copyright (C) 1997-2020 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 #include "../../SDL_internal.h"
23
24 #if SDL_VIDEO_DRIVER_ANDROID
25
26 #include "SDL_androidmouse.h"
27
28 #include "SDL_events.h"
29 #include "../../events/SDL_mouse_c.h"
30
31 #include "../../core/android/SDL_android.h"
32
33 /* See Android's MotionEvent class for constants */
34 #define ACTION_DOWN 0
35 #define ACTION_UP 1
36 #define ACTION_MOVE 2
37 #define ACTION_HOVER_MOVE 7
38 #define ACTION_SCROLL 8
39 #define BUTTON_PRIMARY 1
40 #define BUTTON_SECONDARY 2
41 #define BUTTON_TERTIARY 4
42 #define BUTTON_BACK 8
43 #define BUTTON_FORWARD 16
44
45 typedef struct
46 {
47 int custom_cursor;
48 int system_cursor;
49
50 } SDL_AndroidCursorData;
51
52 /* Last known Android mouse button state (includes all buttons) */
53 static int last_state;
54
55 /* Blank cursor */
56 static SDL_Cursor *empty_cursor;
57
58 static SDL_Cursor *
Android_WrapCursor(int custom_cursor,int system_cursor)59 Android_WrapCursor(int custom_cursor, int system_cursor)
60 {
61 SDL_Cursor *cursor;
62
63 cursor = SDL_calloc(1, sizeof(*cursor));
64 if (cursor) {
65 SDL_AndroidCursorData *data = (SDL_AndroidCursorData *)SDL_calloc(1, sizeof(*data));
66 if (data) {
67 data->custom_cursor = custom_cursor;
68 data->system_cursor = system_cursor;
69 cursor->driverdata = data;
70 } else {
71 SDL_free(cursor);
72 cursor = NULL;
73 SDL_OutOfMemory();
74 }
75 } else {
76 SDL_OutOfMemory();
77 }
78
79 return cursor;
80 }
81
82 static SDL_Cursor *
Android_CreateDefaultCursor()83 Android_CreateDefaultCursor()
84 {
85 return Android_WrapCursor(0, SDL_SYSTEM_CURSOR_ARROW);
86 }
87
88 static SDL_Cursor *
Android_CreateCursor(SDL_Surface * surface,int hot_x,int hot_y)89 Android_CreateCursor(SDL_Surface * surface, int hot_x, int hot_y)
90 {
91 int custom_cursor;
92 SDL_Surface *converted;
93
94 converted = SDL_ConvertSurfaceFormat(surface, SDL_PIXELFORMAT_ARGB8888, 0);
95 if (!converted) {
96 return NULL;
97 }
98 custom_cursor = Android_JNI_CreateCustomCursor(converted, hot_x, hot_y);
99 SDL_FreeSurface(converted);
100 if (!custom_cursor) {
101 SDL_Unsupported();
102 return NULL;
103 }
104 return Android_WrapCursor(custom_cursor, 0);
105 }
106
107 static SDL_Cursor *
Android_CreateSystemCursor(SDL_SystemCursor id)108 Android_CreateSystemCursor(SDL_SystemCursor id)
109 {
110 return Android_WrapCursor(0, id);
111 }
112
113 static void
Android_FreeCursor(SDL_Cursor * cursor)114 Android_FreeCursor(SDL_Cursor * cursor)
115 {
116 SDL_free(cursor->driverdata);
117 SDL_free(cursor);
118 }
119
120 static SDL_Cursor *
Android_CreateEmptyCursor()121 Android_CreateEmptyCursor()
122 {
123 if (!empty_cursor) {
124 SDL_Surface *empty_surface = SDL_CreateRGBSurfaceWithFormat(0, 1, 1, 32, SDL_PIXELFORMAT_ARGB8888);
125 if (empty_surface) {
126 SDL_memset(empty_surface->pixels, 0, empty_surface->h * empty_surface->pitch);
127 empty_cursor = Android_CreateCursor(empty_surface, 0, 0);
128 SDL_FreeSurface(empty_surface);
129 }
130 }
131 return empty_cursor;
132 }
133
134 static void
Android_DestroyEmptyCursor()135 Android_DestroyEmptyCursor()
136 {
137 if (empty_cursor) {
138 Android_FreeCursor(empty_cursor);
139 empty_cursor = NULL;
140 }
141 }
142
143 static int
Android_ShowCursor(SDL_Cursor * cursor)144 Android_ShowCursor(SDL_Cursor *cursor)
145 {
146 if (!cursor) {
147 cursor = Android_CreateEmptyCursor();
148 }
149 if (cursor) {
150 SDL_AndroidCursorData *data = (SDL_AndroidCursorData *)cursor->driverdata;
151 if (data->custom_cursor) {
152 if (!Android_JNI_SetCustomCursor(data->custom_cursor)) {
153 return SDL_Unsupported();
154 }
155 } else {
156 if (!Android_JNI_SetSystemCursor(data->system_cursor)) {
157 return SDL_Unsupported();
158 }
159 }
160 return 0;
161 } else {
162 /* SDL error set inside Android_CreateEmptyCursor() */
163 return -1;
164 }
165 }
166
167 static int
Android_SetRelativeMouseMode(SDL_bool enabled)168 Android_SetRelativeMouseMode(SDL_bool enabled)
169 {
170 if (!Android_JNI_SupportsRelativeMouse()) {
171 return SDL_Unsupported();
172 }
173
174 if (!Android_JNI_SetRelativeMouseEnabled(enabled)) {
175 return SDL_Unsupported();
176 }
177
178 return 0;
179 }
180
181 void
Android_InitMouse(void)182 Android_InitMouse(void)
183 {
184 SDL_Mouse *mouse = SDL_GetMouse();
185
186 mouse->CreateCursor = Android_CreateCursor;
187 mouse->CreateSystemCursor = Android_CreateSystemCursor;
188 mouse->ShowCursor = Android_ShowCursor;
189 mouse->FreeCursor = Android_FreeCursor;
190 mouse->SetRelativeMouseMode = Android_SetRelativeMouseMode;
191
192 SDL_SetDefaultCursor(Android_CreateDefaultCursor());
193
194 last_state = 0;
195 }
196
197 void
Android_QuitMouse(void)198 Android_QuitMouse(void)
199 {
200 Android_DestroyEmptyCursor();
201 }
202
203 /* Translate Android mouse button state to SDL mouse button */
204 static Uint8
TranslateButton(int state)205 TranslateButton(int state)
206 {
207 if (state & BUTTON_PRIMARY) {
208 return SDL_BUTTON_LEFT;
209 } else if (state & BUTTON_SECONDARY) {
210 return SDL_BUTTON_RIGHT;
211 } else if (state & BUTTON_TERTIARY) {
212 return SDL_BUTTON_MIDDLE;
213 } else if (state & BUTTON_FORWARD) {
214 return SDL_BUTTON_X1;
215 } else if (state & BUTTON_BACK) {
216 return SDL_BUTTON_X2;
217 } else {
218 return 0;
219 }
220 }
221
222 void
Android_OnMouse(SDL_Window * window,int state,int action,float x,float y,SDL_bool relative)223 Android_OnMouse(SDL_Window *window, int state, int action, float x, float y, SDL_bool relative)
224 {
225 int changes;
226 Uint8 button;
227
228 if (!window) {
229 return;
230 }
231
232 switch(action) {
233 case ACTION_DOWN:
234 changes = state & ~last_state;
235 button = TranslateButton(changes);
236 last_state = state;
237 SDL_SendMouseMotion(window, 0, relative, (int)x, (int)y);
238 SDL_SendMouseButton(window, 0, SDL_PRESSED, button);
239 break;
240
241 case ACTION_UP:
242 changes = last_state & ~state;
243 button = TranslateButton(changes);
244 last_state = state;
245 SDL_SendMouseMotion(window, 0, relative, (int)x, (int)y);
246 SDL_SendMouseButton(window, 0, SDL_RELEASED, button);
247 break;
248
249 case ACTION_MOVE:
250 case ACTION_HOVER_MOVE:
251 SDL_SendMouseMotion(window, 0, relative, (int)x, (int)y);
252 break;
253
254 case ACTION_SCROLL:
255 SDL_SendMouseWheel(window, 0, x, y, SDL_MOUSEWHEEL_NORMAL);
256 break;
257
258 default:
259 break;
260 }
261 }
262
263 #endif /* SDL_VIDEO_DRIVER_ANDROID */
264
265 /* vi: set ts=4 sw=4 expandtab: */
266
267