Atlas - SDL_rpimouse.c
Home / ext / SDL2 / src / video / raspberry Lines: 1 | Size: 11984 bytes [Download] [Show on GitHub] [Search similar files] [Raw] [Raw (proxy)][FILE BEGIN]1/* 2 Simple DirectMedia Layer 3 Copyright (C) 1997-2018 Sam Lantinga <[email protected]> 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#include "../../SDL_internal.h" 22 23#if SDL_VIDEO_DRIVER_RPI 24 25#include "SDL_assert.h" 26#include "SDL_surface.h" 27#include "SDL_hints.h" 28 29#include "SDL_rpivideo.h" 30#include "SDL_rpimouse.h" 31 32#include "../SDL_sysvideo.h" 33#include "../../events/SDL_mouse_c.h" 34#include "../../events/default_cursor.h" 35 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 */ 45 46static SDL_Cursor *RPI_CreateDefaultCursor(void); 47static SDL_Cursor *RPI_CreateCursor(SDL_Surface * surface, int hot_x, int hot_y); 48static int RPI_ShowCursor(SDL_Cursor * cursor); 49static void RPI_MoveCursor(SDL_Cursor * cursor); 50static void RPI_FreeCursor(SDL_Cursor * cursor); 51static void RPI_WarpMouse(SDL_Window * window, int x, int y); 52static int RPI_WarpMouseGlobal(int x, int y); 53 54static SDL_Cursor * 55RPI_CreateDefaultCursor(void) 56{ 57 return SDL_CreateCursor(default_cdata, default_cmask, DEFAULT_CWIDTH, DEFAULT_CHEIGHT, DEFAULT_CHOTX, DEFAULT_CHOTY); 58} 59 60/* Create a cursor from a surface */ 61static SDL_Cursor * 62RPI_CreateCursor(SDL_Surface * surface, int hot_x, int hot_y) 63{ 64 RPI_CursorData *curdata; 65 SDL_Cursor *cursor; 66 int ret; 67 VC_RECT_T dst_rect; 68 Uint32 dummy; 69 70 SDL_assert(surface->format->format == SDL_PIXELFORMAT_ARGB8888); 71 SDL_assert(surface->pitch == surface->w * 4); 72 73 cursor = (SDL_Cursor *) SDL_calloc(1, sizeof(*cursor)); 74 if (cursor == NULL) { 75 SDL_OutOfMemory(); 76 return NULL; 77 } 78 curdata = (RPI_CursorData *) SDL_calloc(1, sizeof(*curdata)); 79 if (curdata == NULL) { 80 SDL_OutOfMemory(); 81 SDL_free(cursor); 82 return NULL; 83 } 84 85 curdata->hot_x = hot_x; 86 curdata->hot_y = hot_y; 87 curdata->w = surface->w; 88 curdata->h = surface->h; 89 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. 99 */ 100 ret = vc_dispmanx_resource_write_data(curdata->resource, VC_IMAGE_ARGB8888, surface->pitch, surface->pixels, &dst_rect); 101 SDL_assert (ret == DISPMANX_SUCCESS); 102 103 cursor->driverdata = curdata; 104 105 return cursor; 106 107} 108 109/* Show the specified cursor, or hide if cursor is NULL */ 110static int 111RPI_ShowCursor(SDL_Cursor * cursor) 112{ 113 int ret; 114 DISPMANX_UPDATE_HANDLE_T update; 115 RPI_CursorData *curdata; 116 VC_RECT_T src_rect, dst_rect; 117 SDL_Mouse *mouse; 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; 122 const char *env; 123 124 mouse = SDL_GetMouse(); 125 if (mouse == NULL) { 126 return -1; 127 } 128 129 if (cursor == NULL) { 130 /* FIXME: We hide the current mouse's cursor, what we actually need is *_HideCursor */ 131 132 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); 136 SDL_assert(update); 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; 142 } 143 } 144 return 0; 145 } 146 147 curdata = (RPI_CursorData *) cursor->driverdata; 148 if (curdata == NULL) { 149 return -1; 150 } 151 152 if (mouse->focus == NULL) { 153 return -1; 154 } 155 156 display = SDL_GetDisplayForWindow(mouse->focus); 157 if (display == NULL) { 158 return -1; 159 } 160 161 data = (SDL_DisplayData*) display->driverdata; 162 if (data == NULL) { 163 return -1; 164 } 165 166 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); 169 170 update = vc_dispmanx_update_start(10); 171 SDL_assert(update); 172 173 env = SDL_GetHint(SDL_HINT_RPI_VIDEO_LAYER); 174 if (env) { 175 layer = SDL_atoi(env) + 1; 176 } 177 178 curdata->element = vc_dispmanx_element_add(update, 179 data->dispman_display, 180 layer, 181 &dst_rect, 182 curdata->resource, 183 &src_rect, 184 DISPMANX_PROTECTION_NONE, 185 &alpha, 186 DISPMANX_NO_HANDLE, // clamp 187 VC_IMAGE_ROT0); 188 SDL_assert(curdata->element > DISPMANX_NO_HANDLE); 189 ret = vc_dispmanx_update_submit_sync(update); 190 SDL_assert(ret == DISPMANX_SUCCESS); 191 } 192 193 return 0; 194} 195 196/* Free a window manager cursor */ 197static void 198RPI_FreeCursor(SDL_Cursor * cursor) 199{ 200 int ret; 201 DISPMANX_UPDATE_HANDLE_T update; 202 RPI_CursorData *curdata; 203 204 if (cursor != NULL) { 205 curdata = (RPI_CursorData *) cursor->driverdata; 206 207 if (curdata != NULL) { 208 if (curdata->element != DISPMANX_NO_HANDLE) { 209 update = vc_dispmanx_update_start(10); 210 SDL_assert(update); 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); 215 } 216 217 if (curdata->resource != DISPMANX_NO_HANDLE) { 218 ret = vc_dispmanx_resource_delete(curdata->resource); 219 SDL_assert(ret == DISPMANX_SUCCESS); 220 } 221 222 SDL_free(cursor->driverdata); 223 } 224 SDL_free(cursor); 225 } 226} 227 228/* Warp the mouse to (x,y) */ 229static void 230RPI_WarpMouse(SDL_Window * window, int x, int y) 231{ 232 RPI_WarpMouseGlobal(x, y); 233} 234 235/* Warp the mouse to (x,y) */ 236static int 237RPI_WarpMouseGlobal(int x, int y) 238{ 239 RPI_CursorData *curdata; 240 DISPMANX_UPDATE_HANDLE_T update; 241 int ret; 242 VC_RECT_T dst_rect; 243 VC_RECT_T src_rect; 244 SDL_Mouse *mouse = SDL_GetMouse(); 245 246 if (mouse == NULL || mouse->cur_cursor == NULL || mouse->cur_cursor->driverdata == NULL) { 247 return 0; 248 } 249 250 /* Update internal mouse position. */ 251 SDL_SendMouseMotion(mouse->focus, mouse->mouseID, 0, x, y); 252 253 curdata = (RPI_CursorData *) mouse->cur_cursor->driverdata; 254 if (curdata->element == DISPMANX_NO_HANDLE) { 255 return 0; 256 } 257 258 update = vc_dispmanx_update_start(10); 259 if (!update) { 260 return 0; 261 } 262 263 src_rect.x = 0; 264 src_rect.y = 0; 265 src_rect.width = curdata->w << 16; 266 src_rect.height = curdata->h << 16; 267 dst_rect.x = x; 268 dst_rect.y = y; 269 dst_rect.width = curdata->w; 270 dst_rect.height = curdata->h; 271 272 ret = vc_dispmanx_element_change_attributes( 273 update, 274 curdata->element, 275 0, 276 0, 277 0, 278 &dst_rect, 279 &src_rect, 280 DISPMANX_NO_HANDLE, 281 DISPMANX_NO_ROTATE); 282 if (ret != DISPMANX_SUCCESS) { 283 return SDL_SetError("vc_dispmanx_element_change_attributes() failed"); 284 } 285 286 /* 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"); 290 } 291 return 0; 292} 293 294/* Warp the mouse to (x,y) */ 295static int 296RPI_WarpMouseGlobalGraphicOnly(int x, int y) 297{ 298 RPI_CursorData *curdata; 299 DISPMANX_UPDATE_HANDLE_T update; 300 int ret; 301 VC_RECT_T dst_rect; 302 VC_RECT_T src_rect; 303 SDL_Mouse *mouse = SDL_GetMouse(); 304 305 if (mouse == NULL || mouse->cur_cursor == NULL || mouse->cur_cursor->driverdata == NULL) { 306 return 0; 307 } 308 309 curdata = (RPI_CursorData *) mouse->cur_cursor->driverdata; 310 if (curdata->element == DISPMANX_NO_HANDLE) { 311 return 0; 312 } 313 314 update = vc_dispmanx_update_start(10); 315 if (!update) { 316 return 0; 317 } 318 319 src_rect.x = 0; 320 src_rect.y = 0; 321 src_rect.width = curdata->w << 16; 322 src_rect.height = curdata->h << 16; 323 dst_rect.x = x; 324 dst_rect.y = y; 325 dst_rect.width = curdata->w; 326 dst_rect.height = curdata->h; 327 328 ret = vc_dispmanx_element_change_attributes( 329 update, 330 curdata->element, 331 0, 332 0, 333 0, 334 &dst_rect, 335 &src_rect, 336 DISPMANX_NO_HANDLE, 337 DISPMANX_NO_ROTATE); 338 if (ret != DISPMANX_SUCCESS) { 339 return SDL_SetError("vc_dispmanx_element_change_attributes() failed"); 340 } 341 342 /* 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"); 346 } 347 return 0; 348} 349 350void 351RPI_InitMouse(_THIS) 352{ 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! 355 */ 356 SDL_Mouse *mouse = SDL_GetMouse(); 357 358 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; 364 365 SDL_SetDefaultCursor(RPI_CreateDefaultCursor()); 366} 367 368void 369RPI_QuitMouse(_THIS) 370{ 371 372} 373 374/* This is called when a mouse motion event occurs */ 375static void 376RPI_MoveCursor(SDL_Cursor * cursor) 377{ 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); 382} 383 384#endif /* SDL_VIDEO_DRIVER_RPI */ 385 386/* vi: set ts=4 sw=4 expandtab: */ 387[FILE END](C) 2025 0x4248 (C) 2025 4248 Media and 4248 Systems, All part of 0x4248 See LICENCE files for more information. 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