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      1 /*
      2  * Copyright  2011 Kristian Hgsberg
      3  * Copyright  2011 Benjamin Franzke
      4  *
      5  * Permission is hereby granted, free of charge, to any person obtaining a
      6  * copy of this software and associated documentation files (the "Software"),
      7  * to deal in the Software without restriction, including without limitation
      8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
      9  * and/or sell copies of the Software, and to permit persons to whom the
     10  * Software is furnished to do so, subject to the following conditions:
     11  *
     12  * The above copyright notice and this permission notice (including the next
     13  * paragraph) shall be included in all copies or substantial portions of the
     14  * Software.
     15  *
     16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
     17  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     18  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
     19  * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
     20  * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
     21  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
     22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
     23  * DEALINGS IN THE SOFTWARE.
     24  *
     25  * Authors:
     26  *    Kristian Hgsberg <krh (at) bitplanet.net>
     27  *    Benjamin Franzke <benjaminfranzke (at) googlemail.com>
     28  */
     29 
     30 #include <stdlib.h>
     31 #include <string.h>
     32 
     33 #include "wayland-egl.h"
     34 #include "wayland-egl-backend.h"
     35 
     36 /* GCC visibility */
     37 #if defined(__GNUC__)
     38 #define WL_EGL_EXPORT __attribute__ ((visibility("default")))
     39 #else
     40 #define WL_EGL_EXPORT
     41 #endif
     42 
     43 WL_EGL_EXPORT void
     44 wl_egl_window_resize(struct wl_egl_window *egl_window,
     45 		     int width, int height,
     46 		     int dx, int dy)
     47 {
     48 	if (width <= 0 || height <= 0)
     49 		return;
     50 
     51 	egl_window->width  = width;
     52 	egl_window->height = height;
     53 	egl_window->dx     = dx;
     54 	egl_window->dy     = dy;
     55 
     56 	if (egl_window->resize_callback)
     57 		egl_window->resize_callback(egl_window, egl_window->private);
     58 }
     59 
     60 WL_EGL_EXPORT struct wl_egl_window *
     61 wl_egl_window_create(struct wl_surface *surface,
     62 		     int width, int height)
     63 {
     64 	struct wl_egl_window *egl_window;
     65 
     66 	if (width <= 0 || height <= 0)
     67 		return NULL;
     68 
     69 	egl_window = calloc(1, sizeof *egl_window);
     70 	if (!egl_window)
     71 		return NULL;
     72 
     73 	/* Cast away the constness to set the version number.
     74 	 *
     75 	 * We want the const notation since it gives an explicit
     76 	 * feedback to the backend implementation, should it try to
     77 	 * change it.
     78 	 *
     79 	 * The latter in itself is not too surprising as these days APIs
     80 	 * tend to provide bidirectional version field.
     81 	 */
     82 	intptr_t *version = (intptr_t *)&egl_window->version;
     83 	*version = WL_EGL_WINDOW_VERSION;
     84 
     85 	egl_window->surface = surface;
     86 
     87 	egl_window->width  = width;
     88 	egl_window->height = height;
     89 
     90 	return egl_window;
     91 }
     92 
     93 WL_EGL_EXPORT void
     94 wl_egl_window_destroy(struct wl_egl_window *egl_window)
     95 {
     96 	if (egl_window->destroy_window_callback)
     97 		egl_window->destroy_window_callback(egl_window->private);
     98 	free(egl_window);
     99 }
    100 
    101 WL_EGL_EXPORT void
    102 wl_egl_window_get_attached_size(struct wl_egl_window *egl_window,
    103 				int *width, int *height)
    104 {
    105 	if (width)
    106 		*width = egl_window->attached_width;
    107 	if (height)
    108 		*height = egl_window->attached_height;
    109 }
    110