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#define _POSIX_C_SOURCE 200809L
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <unistd.h>
#include <wayland-client.h>
#include <EGL/egl.h>
#include <EGL/eglext.h>
#include "egl-common.h"
EGLDisplay egl_display;
EGLConfig egl_config;
EGLContext egl_context;
PFNEGLGETPLATFORMDISPLAYEXTPROC eglGetPlatformDisplayEXT;
PFNEGLCREATEPLATFORMWINDOWSURFACEEXTPROC eglCreatePlatformWindowSurfaceEXT;
const EGLint config_attribs[] = {
EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
EGL_RED_SIZE, 1,
EGL_GREEN_SIZE, 1,
EGL_BLUE_SIZE, 1,
EGL_ALPHA_SIZE, 1,
EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
EGL_NONE,
};
const EGLint context_attribs[] = {
EGL_CONTEXT_CLIENT_VERSION, 2,
EGL_NONE,
};
bool
egl_init (struct wl_display *display)
{
const char *client_exts_str = eglQueryString (EGL_NO_DISPLAY, EGL_EXTENSIONS);
if (client_exts_str == NULL) {
if (eglGetError () == EGL_BAD_DISPLAY)
fprintf (stderr, "EGL_EXT_client_extensions not supported\n");
else
fprintf (stderr, "Failed to query EGL client extensions\n");
return false;
}
if (!strstr (client_exts_str, "EGL_EXT_platform_base")) {
fprintf (stderr, "EGL_EXT_platform_base not supported\n");
return false;
}
if (!strstr (client_exts_str, "EGL_EXT_platform_wayland")) {
fprintf (stderr, "EGL_EXT_platform_wayland not supported\n");
return false;
}
eglGetPlatformDisplayEXT = (void *)eglGetProcAddress ("eglGetPlatformDisplayEXT");
if (eglGetPlatformDisplayEXT == NULL) {
fprintf (stderr, "Failed to get eglGetPlatformDisplayEXT\n");
return false;
}
eglCreatePlatformWindowSurfaceEXT =
(void *)eglGetProcAddress ("eglCreatePlatformWindowSurfaceEXT");
if (eglCreatePlatformWindowSurfaceEXT == NULL) {
fprintf (stderr, "Failed to get eglCreatePlatformWindowSurfaceEXT\n");
return false;
}
egl_display = eglGetPlatformDisplayEXT (EGL_PLATFORM_WAYLAND_EXT, display, NULL);
if (egl_display == EGL_NO_DISPLAY) {
fprintf (stderr, "Failed to create EGL display\n");
goto error;
}
if (eglInitialize (egl_display, NULL, NULL) == EGL_FALSE) {
fprintf (stderr, "Failed to initialize EGL\n");
goto error;
}
EGLint matched = 0;
if (!eglChooseConfig (egl_display, config_attribs, &egl_config, 1, &matched)) {
fprintf (stderr, "eglChooseConfig failed\n");
goto error;
}
if (matched == 0) {
fprintf (stderr, "Failed to match an EGL config\n");
goto error;
}
egl_context = eglCreateContext (egl_display, egl_config, EGL_NO_CONTEXT, context_attribs);
if (egl_context == EGL_NO_CONTEXT) {
fprintf (stderr, "Failed to create EGL context\n");
goto error;
}
return true;
error:
eglMakeCurrent (EGL_NO_DISPLAY, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
if (egl_display)
eglTerminate (egl_display);
eglReleaseThread ();
return false;
}
void
egl_finish (void)
{
eglMakeCurrent (egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
eglDestroyContext (egl_display, egl_context);
eglTerminate (egl_display);
eglReleaseThread ();
}
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