platform.h
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/*
* Copyright © 2015 Collabora, Ltd.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef WESTON_PLATFORM_H
#define WESTON_PLATFORM_H
#include <stdbool.h>
#include <string.h>
#ifdef ENABLE_EGL
#include <wayland-egl.h>
#include <EGL/egl.h>
#include <EGL/eglext.h>
#include "weston-egl-ext.h"
#endif
#ifdef __cplusplus
extern "C" {
#endif
#ifdef ENABLE_EGL
static bool
weston_check_egl_extension(const char *extensions, const char *extension)
{
size_t extlen = strlen(extension);
const char *end = extensions + strlen(extensions);
while (extensions < end)
{
size_t n = 0;
/* Skip whitespaces, if any */
if (*extensions == ' ')
{
extensions++;
continue;
}
n = strcspn(extensions, " ");
/* Compare strings */
if ((n == extlen) && (strncmp(extension, extensions, n) == 0))
{
return true; /* Found */
}
extensions += n;
}
/* Not found */
return false;
}
static inline void *
weston_platform_get_egl_proc_address(const char *address)
{
const char *extensions = eglQueryString(EGL_NO_DISPLAY, EGL_EXTENSIONS);
if (extensions &&
(weston_check_egl_extension(extensions, "EGL_EXT_platform_wayland") ||
weston_check_egl_extension(extensions, "EGL_KHR_platform_wayland")))
{
return (void *) eglGetProcAddress(address);
}
return NULL;
}
static inline EGLDisplay
weston_platform_get_egl_display(EGLenum platform, void *native_display,
const EGLint *attrib_list)
{
static PFNEGLGETPLATFORMDISPLAYEXTPROC get_platform_display = NULL;
if (!get_platform_display)
{
get_platform_display = (PFNEGLGETPLATFORMDISPLAYEXTPROC)
weston_platform_get_egl_proc_address(
"eglGetPlatformDisplayEXT");
}
if (get_platform_display)
{
return get_platform_display(platform,
native_display, attrib_list);
}
return eglGetDisplay((EGLNativeDisplayType) native_display);
}
static inline EGLSurface
weston_platform_create_egl_surface(EGLDisplay dpy, EGLConfig config,
void *native_window,
const EGLint *attrib_list)
{
static PFNEGLCREATEPLATFORMWINDOWSURFACEEXTPROC
create_platform_window = NULL;
if (!create_platform_window)
{
create_platform_window = (PFNEGLCREATEPLATFORMWINDOWSURFACEEXTPROC)
weston_platform_get_egl_proc_address(
"eglCreatePlatformWindowSurfaceEXT");
}
if (create_platform_window)
{
return create_platform_window(dpy, config,
native_window,
attrib_list);
}
return eglCreateWindowSurface(dpy, config,
(EGLNativeWindowType) native_window,
attrib_list);
}
static inline EGLBoolean
weston_platform_destroy_egl_surface(EGLDisplay display,
EGLSurface surface)
{
return eglDestroySurface(display, surface);
}
#else /* ENABLE_EGL */
static inline void *
weston_platform_get_egl_display(int platform, void *native_display,
const int *attrib_list)
{
return NULL;
}
static inline void *
weston_platform_create_egl_surface(void *dpy, void *config,
void *native_window,
const int *attrib_list)
{
return NULL;
}
static inline unsigned int
weston_platform_destroy_egl_surface(void *display,
void *surface)
{
return 1;
}
#endif /* ENABLE_EGL */
#ifdef __cplusplus
}
#endif
#endif /* WESTON_PLATFORM_H */