Re: Could I use cairo with opengles in android?

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


2012/5/18 Henry (Yu) Song - SISA <[email protected]>

> 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: [email protected][cairo-bounces+henry.song=
> [email protected]] on behalf of Jihe Wei [[email protected]]
> Sent: Friday, May 18, 2012 2:54 AM
> To: [email protected]
> Subject: [cairo] Could I use cairo with opengles in android?
>
> 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
>

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