请用生成如下代码:EGLSurface与QWindow的OpenGL context进行共享,在QWindow中创建一个EGLSurface,并将它与QWindow的OpenGL context进行共享,这里需要使用EGL_KHR_image_base扩展。
时间: 2023-06-13 19:04:03 浏览: 326
以下是实现EGLSurface与QWindow的OpenGL context进行共享的代码:
```
// 获取QWindow的OpenGL context
QOpenGLContext *context = QOpenGLContext::currentContext();
// 创建EGLDisplay
EGLDisplay eglDisplay = eglGetDisplay(EGL_DEFAULT_DISPLAY);
// 初始化EGLDisplay
EGLint major, minor;
eglInitialize(eglDisplay, &major, &minor);
// 设置EGLConfig属性
EGLint configAttribs[] = {
EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
EGL_RED_SIZE, 8,
EGL_GREEN_SIZE, 8,
EGL_BLUE_SIZE, 8,
EGL_ALPHA_SIZE, 8,
EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
EGL_NONE
};
// 获取EGLConfig
EGLConfig config;
EGLint numConfigs;
eglChooseConfig(eglDisplay, configAttribs, &config, 1, &numConfigs);
// 获取QWindow的native handle
QWindow *window = ...;
EGLNativeWindowType nativeWindow = (EGLNativeWindowType) window->winId();
// 创建EGLSurface
EGLint surfaceAttribs[] = {
EGL_NONE
};
EGLSurface eglSurface = eglCreateWindowSurface(eglDisplay, config, nativeWindow, surfaceAttribs);
// 将EGLSurface与QWindow的OpenGL context进行共享
EGLint contextAttribs[] = {
EGL_NONE
};
EGLContext sharedContext = context->handle();
eglBindAPI(EGL_OPENGL_ES_API);
EGLContext eglContext = eglCreateContext(eglDisplay, config, sharedContext, contextAttribs);
// 使用EGL_KHR_image_base扩展来共享EGLSurface
PFNEGLCREATEIMAGEKHRPROC eglCreateImageKHR = (PFNEGLCREATEIMAGEKHRPROC) eglGetProcAddress("eglCreateImageKHR");
PFNEGLDESTROYIMAGEKHRPROC eglDestroyImageKHR = (PFNEGLDESTROYIMAGEKHRPROC) eglGetProcAddress("eglDestroyImageKHR");
EGLint imageAttribs[] = {
EGL_IMAGE_PRESERVED_KHR, EGL_TRUE,
EGL_NONE
};
EGLImageKHR eglImage = eglCreateImageKHR(eglDisplay, EGL_NO_CONTEXT, EGL_NATIVE_PIXMAP_KHR, NULL, imageAttribs);
GLuint textureId;
glGenTextures(1, &textureId);
glBindTexture(GL_TEXTURE_2D, textureId);
glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, eglImage);
// 渲染到EGLSurface
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glBindTexture(GL_TEXTURE_2D, textureId);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
// 销毁EGLSurface和EGLDisplay
eglDestroySurface(eglDisplay, eglSurface);
eglTerminate(eglDisplay);
```
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