#include "include/core/SkCapabilities.h"
#include "include/core/SkImage.h"
#include "include/core/SkImageInfo.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkScalar.h"
#include "include/core/SkSurface.h"
#include "include/utils/SkNoDrawCanvas.h"
#include "src/image/SkSurface_Base.h"
class SkCanvas;
class SkPaint;
class SkPixmap;
struct SkIRect;
struct SkSamplingOptions;
class SkNullSurface : public SkSurface_Base { … };
namespace SkSurfaces {
sk_sp<SkSurface> Null(int width, int height) { … }
}