/*
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* Copyright 2013 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkGpuBlurUtils_DEFINED
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#define SkGpuBlurUtils_DEFINED
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#if SK_SUPPORT_GPU
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#include "GrRenderTargetContext.h"
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#include "effects/GrTextureDomain.h"
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class GrContext;
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class GrTexture;
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struct SkRect;
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namespace SkGpuBlurUtils {
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/**
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* Applies a 2D Gaussian blur to a given texture. The blurred result is returned
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* as a renderTargetContext in case the caller wishes to future draw into the result.
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* Note: one of sigmaX and sigmaY should be non-zero!
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* @param context The GPU context
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* @param src The source to be blurred.
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* @param colorSpace Color space of the source (used for the renderTargetContext result,
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* too).
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* @param dstBounds The destination bounds, relative to the source texture.
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* @param srcBounds The source bounds, relative to the source texture. If non-null,
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* no pixels will be sampled outside of this rectangle.
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* @param sigmaX The blur's standard deviation in X.
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* @param sigmaY The blur's standard deviation in Y.
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* @param mode The mode to handle samples outside bounds.
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* @param fit backing fit for the returned render target context
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* @return The renderTargetContext containing the blurred result.
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*/
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sk_sp<GrRenderTargetContext> GaussianBlur(
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GrRecordingContext* context,
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sk_sp<GrTextureProxy> src,
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sk_sp<SkColorSpace> colorSpace,
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const SkIRect& dstBounds,
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const SkIRect& srcBounds,
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float sigmaX,
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float sigmaY,
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GrTextureDomain::Mode mode,
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SkAlphaType at,
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SkBackingFit fit = SkBackingFit::kApprox);
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};
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#endif
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#endif
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