src/egl/wayland/wayland-egl/wayland-egl.c

   1 /*
   2  * Copyright © 2011 Kristian Høgsberg
   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 Høgsberg <krh@bitplanet.net>
  27  *    Benjamin Franzke <benjaminfranzke@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 }