forked from enlightenment/efl
Add initial swapper code.
Signed-off-by: Christopher Michael <cp.michael@samsung.com> SVN revision: 83248
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <sys/mman.h>
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#ifdef EVAS_CSERVE2
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# include "evas_cs2_private.h"
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#endif
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#include "evas_common.h"
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#include "evas_macros.h"
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#include "evas_engine.h"
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#include "evas_swapper.h"
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/* local structures */
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typedef struct _Wl_Buffer Wl_Buffer;
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struct _Wl_Buffer
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{
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int w, h;
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struct wl_buffer *buffer;
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void *data;
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size_t size;
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Eina_Bool valid : 1;
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};
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struct _Wl_Swapper
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{
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Wl_Buffer buff[3];
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int w, h, depth;
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int buff_cur, buff_num;
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struct wl_shm *shm;
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struct wl_surface *surface;
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Eina_Bool alpha : 1;
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Eina_Bool mapped : 1;
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};
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/* local function prototypes */
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static Eina_Bool _evas_swapper_buffer_new(Wl_Swapper *ws, Wl_Buffer *wb);
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static void _evas_swapper_buffer_free(Wl_Buffer *wb);
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static void _evas_swapper_buffer_put(Wl_Swapper *ws, Wl_Buffer *wb, Eina_Rectangle *rects, unsigned int count);
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static void _evas_swapper_buffer_release(void *data, struct wl_buffer *buffer);
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static const struct wl_buffer_listener _evas_swapper_buffer_listener =
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{
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_evas_swapper_buffer_release
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};
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/* local variables */
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Wl_Swapper *
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evas_swapper_setup(int w, int h, Outbuf_Depth depth, Eina_Bool alpha, struct wl_shm *shm, struct wl_surface *surface)
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{
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Wl_Swapper *ws;
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int i = 0;
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/* try to allocate a new swapper */
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if (!(ws = calloc(1, sizeof(Wl_Swapper))))
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return NULL;
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/* set some properties */
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ws->w = w;
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ws->h = h;
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ws->depth = depth;
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ws->alpha = alpha;
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ws->shm = shm;
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ws->surface = surface;
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ws->buff_num = 3;
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for (i = 0; i < ws->buff_num; i++)
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{
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/* try to create new internal Wl_Buffer */
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if (!_evas_swapper_buffer_new(ws, &(ws->buff[i])))
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{
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/* failed to create wl_buffer. free the swapper */
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evas_swapper_free(ws);
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return NULL;
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}
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}
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/* return allocated swapper */
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return ws;
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}
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void
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evas_swapper_swap(Wl_Swapper *ws, Eina_Rectangle *rects, unsigned int count)
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{
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int n = 0;
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/* check for valid swapper */
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if (!ws) return;
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n = ws->buff_cur;
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_evas_swapper_buffer_put(ws, &(ws->buff[n]), rects, count);
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ws->buff[n].valid = EINA_TRUE;
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ws->buff_cur = (ws->buff_cur + 1) % ws->buff_num;
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}
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void
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evas_swapper_free(Wl_Swapper *ws)
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{
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int i = 0;
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/* check for valid swapper */
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if (!ws) return;
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/* loop the swapper's buffers and free them */
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for (i = 0; i < ws->buff_num; i++)
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_evas_swapper_buffer_free(&(ws->buff[i]));
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/* free the allocated structure */
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free(ws);
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}
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void *
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evas_swapper_buffer_map(Wl_Swapper *ws)
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{
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/* check for valid swapper */
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if (!ws) return NULL;
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/* set mapped property */
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ws->mapped = EINA_TRUE;
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/* return wl_buffer data */
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return ws->buff[ws->buff_cur].data;
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}
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void
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evas_swapper_buffer_unmap(Wl_Swapper *ws)
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{
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/* check for valid swapper */
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if (!ws) return;
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ws->mapped = EINA_FALSE;
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}
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int
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evas_swapper_buffer_state_get(Wl_Swapper *ws)
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{
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int i = 0, n = 0, count = 0;
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for (i = 0; i < ws->buff_num; i++)
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{
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n = (ws->buff_num + ws->buff_cur - (i)) % ws->buff_num;
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if (ws->buff[n].valid) count++;
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else break;
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}
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if (count == ws->buff_num)
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{
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if (count == 1) return MODE_COPY;
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else if (count == 2) return MODE_DOUBLE;
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else if (count == 3) return MODE_TRIPLE;
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}
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return MODE_FULL;
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}
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/* local functions */
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static Eina_Bool
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_evas_swapper_buffer_new(Wl_Swapper *ws, Wl_Buffer *wb)
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{
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char tmp[PATH_MAX];
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struct wl_shm_pool *pool;
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unsigned int format = WL_SHM_FORMAT_XRGB8888;
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void *data;
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int fd = 0;
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size_t size;
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wb->w = ws->w;
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wb->h = ws->h;
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/* calculate new required size */
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size = ((wb->w * sizeof(int)) * wb->h);
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/* check pool size to see if we need to realloc the pool */
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if (size <= wb->size) return EINA_TRUE;
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/* create a pool equal to 1.5 times the requested size to allow for
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* less thrashing during resize */
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size *= 1.5;
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/* create tmp file
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*
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* NB: Should this use XDG_RUNTIME_DIR ?? */
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strcpy(tmp, "/tmp/evas-wayland_shm-XXXXXX");
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/* try to create the tmp file */
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if ((fd = mkstemp(tmp)) < 0)
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{
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ERR("Could not create temporary file.");
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return EINA_FALSE;
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}
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/* try to truncate the tmp file to requested size */
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if (ftruncate(fd, size) < 0)
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{
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ERR("Could not truncate temporary file.");
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close(fd);
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return EINA_FALSE;
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}
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/* mem map the file */
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data = mmap(NULL, size, (PROT_READ | PROT_WRITE), MAP_SHARED, fd, 0);
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/* unlink the tmp file */
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unlink(tmp);
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/* if we failed to mem map the file, return an error */
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if (data == MAP_FAILED)
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{
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ERR("Could not mmap temporary file.");
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close(fd);
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return EINA_FALSE;
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}
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/* actually create the shm pool */
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pool = wl_shm_create_pool(ws->shm, fd, size);
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/* close the file */
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close(fd);
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/* check if this buffer needs argb and set format */
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if (ws->alpha) format = WL_SHM_FORMAT_ARGB8888;
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/* create actual wl_buffer */
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wb->buffer =
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wl_shm_pool_create_buffer(pool, 0, wb->w, wb->h,
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(wb->w * sizeof(int)), format);
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/* add wayland buffer listener */
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wl_buffer_add_listener(wb->buffer, &_evas_swapper_buffer_listener, wb);
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wb->data = data;
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wb->size = size;
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/* return allocated buffer */
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return EINA_TRUE;
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}
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static void
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_evas_swapper_buffer_free(Wl_Buffer *wb)
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{
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/* check for valid buffer */
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if (!wb) return;
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/* kill the wl_buffer */
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if (wb->buffer) wl_buffer_destroy(wb->buffer);
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/* unmap the buffer data */
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munmap(wb->data, wb->size);
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}
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static void
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_evas_swapper_buffer_put(Wl_Swapper *ws, Wl_Buffer *wb, Eina_Rectangle *rects, unsigned int count)
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{
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Eina_Rectangle *rect;
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/* check for valid swapper */
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if (!ws) return;
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/* make sure swapper has a surface */
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if (!ws->surface) return;
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rect = eina_rectangle_new(0, 0, 0, 0);
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if (rects)
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{
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unsigned int i = 0;
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for (i = 0; i < count; i++)
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eina_rectangle_union(rect, &rects[i]);
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}
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else
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{
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Eina_Rectangle r;
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r.x = 0; r.y = 0;
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r.w = wb->w; r.h = wb->h;
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eina_rectangle_union(rect, &r);
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}
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/* surface attach */
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wl_surface_attach(ws->surface, wb->buffer, 0, 0);
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/* surface damage */
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wl_surface_damage(ws->surface, rect->x, rect->y, rect->w, rect->h);
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/* surface commit */
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wl_surface_commit(ws->surface);
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}
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static void
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_evas_swapper_buffer_release(void *data, struct wl_buffer *buffer EINA_UNUSED)
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{
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Wl_Buffer *wb = NULL;
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/* try to get out Wl_Buffer struct */
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if (!(wb = data)) return;
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/* invalidate buffer */
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wb->valid = EINA_FALSE;
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}
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