Hi,Henry i found the implementation of the method cairo_egl_device_create(display, context) is very strange,as below: 1. init attribs with EGL_WIDTH=1and EGL_HEIGHT=1 2. init config use eglChooseConfig method 3. create EGLSurface use eglCreatePbufferSurface method 4. then use eglMakeCurrent to release 5. last, return as &ctx->base.base problems: 1.EGLSurface's width and height both were set to 1 but the method cairo_gl_surface_create supply two parameters for setting width and height another thing, the code i send before should set EGL_SURFACE_TYPE=EGL_PUBUFFER_BIT not EGL_SURFACE_TYPE=EGL_WINDOW_BIT but still nothing display in my phone. <div class="gmail_quote">2012/5/18 Jihe Wei <<a href="mailto:jihe.wei@gmail.com" target="_blank">jihe.wei@gmail.com</a>> <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Henry, I try swap buffer before draw and also after, both not work. notice:my display surface is created by cairo_image_surface_create_for_data, and the data comes from androidbitmap Thanks, Wei <div class="gmail_quote">2012/5/18 Henry (Yu) Song - SISA <<a href="mailto:hsong@sisa.samsung.com" target="_blank">hsong@sisa.samsung.com</a>><div><div> <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> Hi, Jihe Since you have the gl surface as a window surface, you can swap buffer on the surface directly - cairo_gl_surface_swapbuffers (surface). Henry ________________________________________ From: cairo-bounces+henry.song=<a href="mailto:samsung.com@cairographics.org" target="_blank">samsung.com@cairographics.org</a> [cairo-bounces+henry.song=<a href="mailto:samsung.com@cairographics.org" target="_blank">samsung.com@cairographics.org</a>] on behalf of Jihe Wei [<a href="mailto:jihe.wei@gmail.com" target="_blank">jihe.wei@gmail.com</a>] Sent: Friday, May 18, 2012 2:54 AM To: <a href="mailto:cairo@cairographics.org" target="_blank">cairo@cairographics.org</a> Subject: [cairo] Could I use cairo with opengles in android? <div><div> Hi , I wonder where can find some samples show use cairo in android device. rarely found ,so i try it myself, but seems can't render anything details as below, cairo_surface_t *surface = NULL; const EGLint attribs[] = { EGL_SURFACE_TYPE, EGL_WINDOW_BIT, EGL_BLUE_SIZE, 8, EGL_GREEN_SIZE, 8, EGL_RED_SIZE, 8, EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT, EGL_NONE }; const EGLint ctx_attribs[] = { EGL_CONTEXT_CLIENT_VERSION, 2, EGL_NONE }; EGLint format; EGLint numConfigs; EGLConfig config; EGLContext context; EGLint err; EGLDisplay display = eglGetDisplay(EGL_DEFAULT_DISPLAY); err = eglGetError(); LOGE("eglGetDisplay err:%d", err);//return 12288 eglInitialize(display, 0, 0); err = eglGetError(); LOGE("eglInitialize err:%d", err);//return 12288 eglChooseConfig(display, attribs, &config, 1, &numConfigs); err = eglGetError(); LOGE("eglChooseConfig err:%d", err); eglGetConfigAttrib(display, config, EGL_NATIVE_VISUAL_ID, &format); context = eglCreateContext(display, config, EGL_NO_CONTEXT, ctx_attribs); err = eglGetError(); LOGE("eglCreateContext err:%d", err);//return 12288 cairo_device_t * device = cairo_egl_device_create(display, context); cairo_status_t status = cairo_device_status(device);//return success surface = cairo_gl_surface_create(device, CAIRO_CONTENT_ALPHA, info->width, info->height);//return CAIRO_SURFACE_TYPE_GL type I use another surface to display the result from surface(gl) cairo_set_operator(cr_display, CAIRO_OPERATOR_ADD); cairo_set_source_surface(cr_display, surface, 0, 0); cairo_paint(cr_display); Who could help to figure out? thx </div></div></blockquote></div></div></div> </blockquote></div>