src/core/SkImageFilter.cpp

/*
 * Copyright 2012 The Android Open Source Project
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#include "SkImageFilter.h"
#include "SkRect.h"

SK_DEFINE_INST_COUNT(SkImageFilter)

bool SkImageFilter::filterImage(Proxy* proxy, const SkBitmap& src,
                                const SkMatrix& ctm,
                                SkBitmap* result, SkIPoint* loc) {
    SkASSERT(result);
    SkASSERT(loc);
    /*
     *  Give the proxy first shot at the filter. If it returns false, ask
     *  the filter to do it.
     */
    return (proxy && proxy->filterImage(this, src, ctm, result, loc)) ||
           this->onFilterImage(proxy, src, ctm, result, loc);
}

bool SkImageFilter::filterBounds(const SkIRect& src, const SkMatrix& ctm,
                                 SkIRect* dst) {
    SkASSERT(&src);
    SkASSERT(dst);
    return this->onFilterBounds(src, ctm, dst);
}

bool SkImageFilter::onFilterImage(Proxy*, const SkBitmap&, const SkMatrix&,
                                  SkBitmap*, SkIPoint*) {
    return false;
}

bool SkImageFilter::canFilterImageGPU() const {
    return false;
}

GrTexture* SkImageFilter::onFilterImageGPU(GrTexture* texture, const SkRect& rect) {
    return NULL;
}

bool SkImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix& ctm,
                                   SkIRect* dst) {
    *dst = src;
    return true;
}

bool SkImageFilter::asNewCustomStage(GrCustomStage**, GrTexture*) const {
    return false;
}