Make sure there is a current context.

The context of a display is shared with the cairo device.
cairo_acquire_device should be called whenever OpenGL calls are made.

diff --git a/clients/window.c b/clients/window.c
index 2dd7135..45bee61 100644 (file)
--- a/clients/window.c
+++ b/clients/window.c
@@ -167,16 +167,20 @@ struct drm_surface_data {
        struct surface_data data;
        EGLImageKHR image;
        GLuint texture;
-       EGLDisplay dpy;
+       struct display *display;
 };
 
 static void
 drm_surface_data_destroy(void *p)
 {
        struct drm_surface_data *data = p;
+       struct display *d = data->display;
 
+       cairo_device_acquire(d->device);
        glDeleteTextures(1, &data->texture);
-       eglDestroyImageKHR(data->dpy, data->image);
+       cairo_device_release(d->device);
+
+       eglDestroyImageKHR(d->dpy, data->image);
        wl_buffer_destroy(data->data.buffer);
 }
 
@@ -203,13 +207,17 @@ display_create_drm_surface(struct display *display,
        if (data == NULL)
                return NULL;
 
+       data->display = display;
+
        image_attribs[1] = rectangle->width;
        image_attribs[3] = rectangle->height;
        data->image = eglCreateDRMImageMESA(dpy, image_attribs);
+
+       cairo_device_acquire(display->device);
        glGenTextures(1, &data->texture);
-       data->dpy = dpy;
        glBindTexture(GL_TEXTURE_2D, data->texture);
        glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, data->image);
+       cairo_device_release(display->device);
 
        eglExportDRMImageMESA(display->dpy, data->image, &name, NULL, &stride);
 
@@ -240,6 +248,7 @@ display_create_drm_surface_from_file(struct display *display,
        GError *error = NULL;
        int stride, i;
        unsigned char *pixels, *p, *end;
+       struct drm_surface_data *data;
 
        pixbuf = gdk_pixbuf_new_from_file_at_scale(filename,
                                                   rect->width, rect->height,
@@ -275,8 +284,13 @@ display_create_drm_surface_from_file(struct display *display,
        }
 
        surface = display_create_drm_surface(display, rect);
+       data = cairo_surface_get_user_data(surface, &surface_data_key);
+
+       cairo_device_acquire(display->device);
+       glBindTexture(GL_TEXTURE_2D, data->texture);
        glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, rect->width, rect->height,
                        GL_RGBA, GL_UNSIGNED_BYTE, pixels);
+       cairo_device_release(display->device);
 
        gdk_pixbuf_unref(pixbuf);