RHEL的合成器？

RHEL（Red Hat Enterprise Linux）及其衍生版本（如 CentOS）使用的合成器是 GNOME 的默认合成器（Compositor）- Mutter。这个合成器是一个用于以全屏或窗口级别组合输入的工具，以创建更好的视觉效果和更好的性能。

如果您需要为 RHEL 开发您自己的合成器，可以使用以下代码示例作为起点：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <wayland-client.h>
#include <wayland-egl.h>
#include <wayland-cursor.h>
#include <wayland-image.h>
#include <wayland-client-protocol.h>
#include <wayland-util.h>
#include <X11/Xutil.h>
#include <EGL/egl.h>
#include <EGL/eglext.h>
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>

#include "linux-dmabuf.h"

static struct wl_display *display;

static struct wl_compositor *compositor;
static struct wl_subcompositor *subcompositor;
static struct wl_shm *shm;
static struct wl_surface *surface;
static struct wl_callback *frame_callback;
static struct wl_region *input_region;

static struct linux_dmabuf_buffer *dmabuf_buffer;

static struct egl_image *egl_image;
static struct gbm_bo *bo;
static EGLImageKHR image;
static GLuint texture;
static PFNEGLCREATEIMAGEKHRPROC create_image;
static PFNEGLDESTROYIMAGEKHRPROC destroy_image;

static void render_frame(int width, int height)
{
    glClearColor(1,0,0,1);
    glClear(GL_COLOR_BUFFER_BIT);

    glBindTexture(GL_TEXTURE_EXTERNAL_OES, texture);
    glDrawElements(GL_TRIANGLES, 3, GL_UNSIGNED_SHORT, 0);
    glBindTexture(GL_TEXTURE_EXTERNAL_OES, 0);
}

static void dmabuf_callback(struct linux_dmabuf_buffer *buffer, void *data)
{
    dmabuf_buffer = buffer;
    egl_image = eglCreateImageKHR(eglGetCurrentDisplay(),
                                      EGL_NO_CONTEXT,
                                      EGL_LINUX_DMA_BUF_EXT,
                                      NULL,
                                      buffer->attributes,
                                      NULL);
    image = (EGLImageKHR)egl_image;
    glGenTextures(1, &texture);
    glBindTexture(GL_TEXTURE_EXTERNAL_OES, texture);
    glEGLImageTargetTexture2DOES(GL_TEXTURE_EXTERNAL_OES, (GLeglImageOES)(image));
    glBindTexture(GL_TEXTURE_EXTERNAL_OES, 0);
}

static void dmabuf_destroy(struct linux_dmabuf_buffer *buffer, void *data)