ubuntu22上C/C++程序使用weston+wayland+OpenGLES渲染

一，安装依赖软件：sudo apt install zlib1g-dev libssl-dev libgles2-mesa-dev libsystemd-dev libpng-dev libglib2.0-dev libwayland-dev weston libweston-9-dev

二，启动：

# 运行weston
weston -Swayland-1# 运行程序
./yourprogram

  注意：这里启动weston用的wayland-1，所以代码中也要用wayland-1。

三，代码:

#include "wayland-client.h"
#include "wayland-egl.h"
#include "wayland-util.h"
#include <GLES2/gl2.h>
#include <EGL/egl.h>typedef struct stWlContextStruct {struct wl_display *wlDisplay;struct wl_registry *wlRegistry;struct wl_compositor *wlCompositor;struct wl_egl_window *wlNativeWindow;struct wl_surface *wlSurface;struct wl_shell *wlShell;struct wl_shell_surface *wlShellSurface;int width;int height;
} WLContextStruct;void handlePing(void *data, struct wl_shell_surface *shellSurface, uint32_t serial) {wl_shell_surface_pong(shellSurface, serial);
}void handleConfigure(void *data, struct wl_shell_surface *shellSurface, uint32_t edges, int32_t width, int32_t height) {
}void handlePopupDone(void *data, struct wl_shell_surface *shellSurface) {
}const struct wl_shell_surface_listener shellSurfaceListener = {handlePing,handleConfigure,handlePopupDone,
};void registry_handle_global(void *data, struct wl_registry *registry, uint32_t id, const char *interface, uint32_t version) {Navinfo::WLContextStruct *p_wlCtx = (Navinfo::WLContextStruct *)data;if (0 == strcmp(interface, "wl_compositor")) {p_wlCtx->wlCompositor = (wl_compositor *)wl_registry_bind(registry, id, &wl_compositor_interface, 1);break;} else if (0 == strcmp(interface, "wl_compositor")) {p_wlCtx->wlShell = (struct wl_shell *)wl_registry_bind(registry, id, &wl_shell_interface, 1);break;}
}const struct wl_registry_listener registry_listener = {registry_handle_global,NULL,
};void main() {// wayland partunsigned int surfaceWidth = 800;unsigned int surfaceHeight = 600;WLContextStruct wlContextStruct;memset(&wlContextStruct, 0, sizeof(wlContextStruct));wlContextStruct.wlDisplay = wl_display_connect("wayland-1");if (NULL == wlContextStruct.wlDisplay) {LOG_INFO("failed to connect to Wayland display");return false;}wlContextStruct.wlRegistry = wl_display_get_registry(wlContextStruct.wlDisplay);wl_registry_add_listener(wlContextStruct.wlRegistry, &registry_listener, &wlContextStruct);wl_display_dispatch(wlContextStruct.wlDisplay);wl_display_roundtrip(wlContextStruct.wlDisplay);wlContextStruct.wlSurface = wl_compositor_create_surface(wlContextStruct.wlCompositor);wlContextStruct.wlShellSurface = wl_shell_get_shell_surface(wlContextStruct.wlShell, wlContextStruct.wlSurface);wl_shell_surface_add_listener(reinterpret_cast<struct wl_shell_surface *>(wlContextStruct.wlShellSurface), &shellSurfaceListener, &wlContextStruct);wlContextStruct.wlNativeWindow = wl_egl_window_create(wlContextStruct.wlSurface, surfaceWidth, surfaceHeight);wl_shell_surface_set_title(wlContextStruct.wlShellSurface, "Hi_WL");wl_shell_surface_set_toplevel(wlContextStruct.wlShellSurface);// egl partEGLNativeWindowType eglWindow = (EGLNativeWindowType)wlContextStruct.wlNativeWindow;EGLDisplay eglDisplay = eglGetDisplay((EGLNativeDisplayType)wlContextStruct.wlDisplay);EGLint major, minor;eglInitialize(eglDisplay, &major, &minor);eglBindAPI(EGL_OPENGL_ES_API);EGLint count;if (!eglGetConfigs(eglDisplay, nullptr, 0, &count) || count < 1) {return false;}EGLConfig configFound;EGLConfig *configs = static_cast<EGLConfig *>(malloc(count * sizeof(EGLConfig)));if(configs){memset(configs, 0, count * sizeof(EGLConfig));static const EGLint kConfigAttributes[] = {EGL_SURFACE_TYPE, EGL_WINDOW_BIT,EGL_RED_SIZE, 8,EGL_GREEN_SIZE, 8,EGL_BLUE_SIZE, 8,EGL_ALPHA_SIZE, 8,EGL_DEPTH_SIZE, 24,EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,EGL_NONE};EGLint n;ret = eglChooseConfig(eglDisplay, kConfigAttributes, configs, count, &n);if ((ret != EGL_TRUE) || (n < 1)) {return false;}configFound = configs[0];free(configs);configs = nullptr;}static const EGLint kContextAttibutes[] = {EGL_CONTEXT_CLIENT_VERSION, 2,EGL_NONE};EGLContext eEglContext = eglCreateContext(eglDisplay, configFound, EGL_NO_CONTEXT, kContextAttibutes);if (eEglContext == EGL_NO_CONTEXT) {return false;}EGLSurface eglSurface = eglCreateWindowSurface(eglDisplay, configFound, (EGLNativeWindowType)eglWindow, nullptr);ret = eglMakeCurrent(eglDisplay, eglSurface, eglSurface, eEglContext);if (ret != EGL_TRUE) {return false;}// render partwhile (true){// render ...eglSwapBuffers(eglDisplay, eglSurface);}return true;
}