2 Simple DirectMedia Layer
3 Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
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.
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:
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.
21 #include "../../SDL_internal.h"
23 #if SDL_VIDEO_DRIVER_RPI
25 #include "SDL_assert.h"
26 #include "SDL_surface.h"
27 #include "SDL_hints.h"
29 #include "SDL_rpivideo.h"
30 #include "SDL_rpimouse.h"
32 #include "../SDL_sysvideo.h"
33 #include "../../events/SDL_mouse_c.h"
34 #include "../../events/default_cursor.h"
36 /* Copied from vc_vchi_dispmanx.h which is bugged and tries to include a non existing file */
37 /* Attributes changes flag mask */
38 #define ELEMENT_CHANGE_LAYER (1<<0)
39 #define ELEMENT_CHANGE_OPACITY (1<<1)
40 #define ELEMENT_CHANGE_DEST_RECT (1<<2)
41 #define ELEMENT_CHANGE_SRC_RECT (1<<3)
42 #define ELEMENT_CHANGE_MASK_RESOURCE (1<<4)
43 #define ELEMENT_CHANGE_TRANSFORM (1<<5)
44 /* End copied from vc_vchi_dispmanx.h */
46 static SDL_Cursor *RPI_CreateDefaultCursor(void);
47 static SDL_Cursor *RPI_CreateCursor(SDL_Surface * surface, int hot_x, int hot_y);
48 static int RPI_ShowCursor(SDL_Cursor * cursor);
49 static void RPI_MoveCursor(SDL_Cursor * cursor);
50 static void RPI_FreeCursor(SDL_Cursor * cursor);
51 static void RPI_WarpMouse(SDL_Window * window, int x, int y);
52 static int RPI_WarpMouseGlobal(int x, int y);
55 RPI_CreateDefaultCursor(void)
57 return SDL_CreateCursor(default_cdata, default_cmask, DEFAULT_CWIDTH, DEFAULT_CHEIGHT, DEFAULT_CHOTX, DEFAULT_CHOTY);
60 /* Create a cursor from a surface */
62 RPI_CreateCursor(SDL_Surface * surface, int hot_x, int hot_y)
64 RPI_CursorData *curdata;
70 SDL_assert(surface->format->format == SDL_PIXELFORMAT_ARGB8888);
71 SDL_assert(surface->pitch == surface->w * 4);
73 cursor = (SDL_Cursor *) SDL_calloc(1, sizeof(*cursor));
78 curdata = (RPI_CursorData *) SDL_calloc(1, sizeof(*curdata));
79 if (curdata == NULL) {
85 curdata->hot_x = hot_x;
86 curdata->hot_y = hot_y;
87 curdata->w = surface->w;
88 curdata->h = surface->h;
90 /* This usage is inspired by Wayland/Weston RPI code, how they figured this out is anyone's guess */
91 curdata->resource = vc_dispmanx_resource_create(VC_IMAGE_ARGB8888, surface->w | (surface->pitch << 16), surface->h | (surface->h << 16), &dummy);
92 SDL_assert(curdata->resource);
93 vc_dispmanx_rect_set(&dst_rect, 0, 0, curdata->w, curdata->h);
94 /* A note from Weston:
95 * vc_dispmanx_resource_write_data() ignores ifmt,
96 * rect.x, rect.width, and uses stride only for computing
97 * the size of the transfer as rect.height * stride.
98 * Therefore we can only write rows starting at x=0.
100 ret = vc_dispmanx_resource_write_data(curdata->resource, VC_IMAGE_ARGB8888, surface->pitch, surface->pixels, &dst_rect);
101 SDL_assert (ret == DISPMANX_SUCCESS);
103 cursor->driverdata = curdata;
109 /* Show the specified cursor, or hide if cursor is NULL */
111 RPI_ShowCursor(SDL_Cursor * cursor)
114 DISPMANX_UPDATE_HANDLE_T update;
115 RPI_CursorData *curdata;
116 VC_RECT_T src_rect, dst_rect;
118 SDL_VideoDisplay *display;
119 SDL_DisplayData *data;
120 VC_DISPMANX_ALPHA_T alpha = { DISPMANX_FLAGS_ALPHA_FROM_SOURCE /* flags */ , 255 /*opacity 0->255*/, 0 /* mask */ };
121 uint32_t layer = SDL_RPI_MOUSELAYER;
124 mouse = SDL_GetMouse();
129 if (cursor == NULL) {
130 /* FIXME: We hide the current mouse's cursor, what we actually need is *_HideCursor */
132 if (mouse->cur_cursor != NULL && mouse->cur_cursor->driverdata != NULL) {
133 curdata = (RPI_CursorData *) mouse->cur_cursor->driverdata;
134 if (curdata->element > DISPMANX_NO_HANDLE) {
135 update = vc_dispmanx_update_start(10);
137 ret = vc_dispmanx_element_remove(update, curdata->element);
138 SDL_assert(ret == DISPMANX_SUCCESS);
139 ret = vc_dispmanx_update_submit_sync(update);
140 SDL_assert(ret == DISPMANX_SUCCESS);
141 curdata->element = DISPMANX_NO_HANDLE;
147 curdata = (RPI_CursorData *) cursor->driverdata;
148 if (curdata == NULL) {
152 if (mouse->focus == NULL) {
156 display = SDL_GetDisplayForWindow(mouse->focus);
157 if (display == NULL) {
161 data = (SDL_DisplayData*) display->driverdata;
166 if (curdata->element == DISPMANX_NO_HANDLE) {
167 vc_dispmanx_rect_set(&src_rect, 0, 0, curdata->w << 16, curdata->h << 16);
168 vc_dispmanx_rect_set(&dst_rect, mouse->x, mouse->y, curdata->w, curdata->h);
170 update = vc_dispmanx_update_start(10);
173 env = SDL_GetHint(SDL_HINT_RPI_VIDEO_LAYER);
175 layer = SDL_atoi(env) + 1;
178 curdata->element = vc_dispmanx_element_add(update,
179 data->dispman_display,
184 DISPMANX_PROTECTION_NONE,
186 DISPMANX_NO_HANDLE, // clamp
188 SDL_assert(curdata->element > DISPMANX_NO_HANDLE);
189 ret = vc_dispmanx_update_submit_sync(update);
190 SDL_assert(ret == DISPMANX_SUCCESS);
196 /* Free a window manager cursor */
198 RPI_FreeCursor(SDL_Cursor * cursor)
201 DISPMANX_UPDATE_HANDLE_T update;
202 RPI_CursorData *curdata;
204 if (cursor != NULL) {
205 curdata = (RPI_CursorData *) cursor->driverdata;
207 if (curdata != NULL) {
208 if (curdata->element != DISPMANX_NO_HANDLE) {
209 update = vc_dispmanx_update_start(10);
211 ret = vc_dispmanx_element_remove(update, curdata->element);
212 SDL_assert(ret == DISPMANX_SUCCESS);
213 ret = vc_dispmanx_update_submit_sync(update);
214 SDL_assert(ret == DISPMANX_SUCCESS);
217 if (curdata->resource != DISPMANX_NO_HANDLE) {
218 ret = vc_dispmanx_resource_delete(curdata->resource);
219 SDL_assert(ret == DISPMANX_SUCCESS);
222 SDL_free(cursor->driverdata);
228 /* Warp the mouse to (x,y) */
230 RPI_WarpMouse(SDL_Window * window, int x, int y)
232 RPI_WarpMouseGlobal(x, y);
235 /* Warp the mouse to (x,y) */
237 RPI_WarpMouseGlobal(int x, int y)
239 RPI_CursorData *curdata;
240 DISPMANX_UPDATE_HANDLE_T update;
244 SDL_Mouse *mouse = SDL_GetMouse();
246 if (mouse == NULL || mouse->cur_cursor == NULL || mouse->cur_cursor->driverdata == NULL) {
250 /* Update internal mouse position. */
251 SDL_SendMouseMotion(mouse->focus, mouse->mouseID, 0, x, y);
253 curdata = (RPI_CursorData *) mouse->cur_cursor->driverdata;
254 if (curdata->element == DISPMANX_NO_HANDLE) {
258 update = vc_dispmanx_update_start(10);
265 src_rect.width = curdata->w << 16;
266 src_rect.height = curdata->h << 16;
269 dst_rect.width = curdata->w;
270 dst_rect.height = curdata->h;
272 ret = vc_dispmanx_element_change_attributes(
282 if (ret != DISPMANX_SUCCESS) {
283 return SDL_SetError("vc_dispmanx_element_change_attributes() failed");
286 /* Submit asynchronously, otherwise the peformance suffers a lot */
287 ret = vc_dispmanx_update_submit(update, 0, NULL);
288 if (ret != DISPMANX_SUCCESS) {
289 return SDL_SetError("vc_dispmanx_update_submit() failed");
294 /* Warp the mouse to (x,y) */
296 RPI_WarpMouseGlobalGraphicOnly(int x, int y)
298 RPI_CursorData *curdata;
299 DISPMANX_UPDATE_HANDLE_T update;
303 SDL_Mouse *mouse = SDL_GetMouse();
305 if (mouse == NULL || mouse->cur_cursor == NULL || mouse->cur_cursor->driverdata == NULL) {
309 curdata = (RPI_CursorData *) mouse->cur_cursor->driverdata;
310 if (curdata->element == DISPMANX_NO_HANDLE) {
314 update = vc_dispmanx_update_start(10);
321 src_rect.width = curdata->w << 16;
322 src_rect.height = curdata->h << 16;
325 dst_rect.width = curdata->w;
326 dst_rect.height = curdata->h;
328 ret = vc_dispmanx_element_change_attributes(
338 if (ret != DISPMANX_SUCCESS) {
339 return SDL_SetError("vc_dispmanx_element_change_attributes() failed");
342 /* Submit asynchronously, otherwise the peformance suffers a lot */
343 ret = vc_dispmanx_update_submit(update, 0, NULL);
344 if (ret != DISPMANX_SUCCESS) {
345 return SDL_SetError("vc_dispmanx_update_submit() failed");
353 /* FIXME: Using UDEV it should be possible to scan all mice
354 * but there's no point in doing so as there's no multimice support...yet!
356 SDL_Mouse *mouse = SDL_GetMouse();
358 mouse->CreateCursor = RPI_CreateCursor;
359 mouse->ShowCursor = RPI_ShowCursor;
360 mouse->MoveCursor = RPI_MoveCursor;
361 mouse->FreeCursor = RPI_FreeCursor;
362 mouse->WarpMouse = RPI_WarpMouse;
363 mouse->WarpMouseGlobal = RPI_WarpMouseGlobal;
365 SDL_SetDefaultCursor(RPI_CreateDefaultCursor());
374 /* This is called when a mouse motion event occurs */
376 RPI_MoveCursor(SDL_Cursor * cursor)
378 SDL_Mouse *mouse = SDL_GetMouse();
379 /* We must NOT call SDL_SendMouseMotion() on the next call or we will enter recursivity,
380 * so we create a version of WarpMouseGlobal without it. */
381 RPI_WarpMouseGlobalGraphicOnly(mouse->x, mouse->y);
384 #endif /* SDL_VIDEO_DRIVER_RPI */
386 /* vi: set ts=4 sw=4 expandtab: */