lib: Split create_image_surface() out of create_cairo_ctx()

So we can use it in the next commit.

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>

diff --git a/lib/drmtest.c b/lib/drmtest.c
index d9749d7..cf442a0 100644 (file)
--- a/lib/drmtest.c
+++ b/lib/drmtest.c
@@ -1620,9 +1620,8 @@ static cairo_format_t drm_format_to_cairo(uint32_t drm_format)
        abort();
 }
 
-static cairo_t *create_cairo_ctx(int fd, struct kmstest_fb *fb)
+static cairo_surface_t *create_image_surface(int fd, struct kmstest_fb *fb)
 {
-       cairo_t *cr;
        cairo_surface_t *surface;
        cairo_format_t cformat;
        void *fb_ptr;
@@ -1633,6 +1632,16 @@ static cairo_t *create_cairo_ctx(int fd, struct kmstest_fb *fb)
                                                   cformat, fb->width,
                                                   fb->height, fb->stride);
        assert(surface);
+
+       return surface;
+}
+
+static cairo_t *create_cairo_ctx(int fd, struct kmstest_fb *fb)
+{
+       cairo_t *cr;
+       cairo_surface_t *surface;
+
+       surface = create_image_surface(fd, fb);
        cr = cairo_create(surface);
        cairo_surface_destroy(surface);