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Diffstat (limited to 'src/effects/SkBlurMask.h')
| -rw-r--r-- | src/effects/SkBlurMask.h | 88 |
1 files changed, 0 insertions, 88 deletions
diff --git a/src/effects/SkBlurMask.h b/src/effects/SkBlurMask.h deleted file mode 100644 index 67009b0bb5..0000000000 --- a/src/effects/SkBlurMask.h +++ /dev/null @@ -1,88 +0,0 @@ -/* - * Copyright 2006 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. - */ - -#ifndef SkBlurMask_DEFINED -#define SkBlurMask_DEFINED - -#include "SkBlurTypes.h" -#include "SkShader.h" -#include "SkMask.h" -#include "SkRRect.h" - -class SkBlurMask { -public: - static bool SK_WARN_UNUSED_RESULT BlurRect(SkScalar sigma, SkMask *dst, const SkRect &src, - SkBlurStyle, SkIPoint *margin = nullptr, - SkMask::CreateMode createMode = - SkMask::kComputeBoundsAndRenderImage_CreateMode); - static bool SK_WARN_UNUSED_RESULT BlurRRect(SkScalar sigma, SkMask *dst, const SkRRect &src, - SkBlurStyle, SkIPoint *margin = nullptr, - SkMask::CreateMode createMode = - SkMask::kComputeBoundsAndRenderImage_CreateMode); - - // forceQuality will prevent BoxBlur from falling back to the low quality approach when sigma - // is very small -- this can be used predict the margin bump ahead of time without completely - // replicating the internal logic. This permits not only simpler caching of blurred results, - // but also being able to predict precisely at what pixels the blurred profile of e.g. a - // rectangle will lie. - // - // Calling details: - // * calculate margin - if src.fImage is null, then this call only calculates the border. - // * failure - if src.fImage is not null, failure is signal with dst->fImage being - // null. - - static bool SK_WARN_UNUSED_RESULT BoxBlur(SkMask* dst, const SkMask& src, - SkScalar sigma, SkBlurStyle style, SkBlurQuality, - SkIPoint* margin = nullptr, - bool forceQuality = false); - - // the "ground truth" blur does a gaussian convolution; it's slow - // but useful for comparison purposes. - static bool SK_WARN_UNUSED_RESULT BlurGroundTruth(SkScalar sigma, SkMask* dst, - const SkMask& src, - SkBlurStyle, SkIPoint* margin = nullptr); - - // If radius > 0, return the corresponding sigma, else return 0 - static SkScalar SK_API ConvertRadiusToSigma(SkScalar radius); - // If sigma > 0.5, return the corresponding radius, else return 0 - static SkScalar SK_API ConvertSigmaToRadius(SkScalar sigma); - - /* Helper functions for analytic rectangle blurs */ - - /** Look up the intensity of the (one dimnensional) blurred half-plane. - @param profile The precomputed 1D blur profile; initialized by ComputeBlurProfile below. - @param loc the location to look up; The lookup will clamp invalid inputs, but - meaningful data are available between 0 and blurred_width - @param blurred_width The width of the final, blurred rectangle - @param sharp_width The width of the original, unblurred rectangle. - */ - static uint8_t ProfileLookup(const uint8_t* profile, int loc, int blurredWidth, int sharpWidth); - - /** Populate the profile of a 1D blurred halfplane. - @param profile The 1D table to fill in - @param size Should be 6*sigma bytes - @param sigma The standard deviation of the gaussian blur kernel - */ - static void ComputeBlurProfile(uint8_t* profile, int size, SkScalar sigma); - - /** Compute an entire scanline of a blurred step function. This is a 1D helper that - will produce both the horizontal and vertical profiles of the blurry rectangle. - @param pixels Location to store the resulting pixel data; allocated and managed by caller - @param profile Precomputed blur profile computed by ComputeBlurProfile above. - @param width Size of the pixels array. - @param sigma Standard deviation of the gaussian blur kernel used to compute the profile; - this implicitly gives the size of the pixels array. - */ - - static void ComputeBlurredScanline(uint8_t* pixels, const uint8_t* profile, - unsigned int width, SkScalar sigma); - - - -}; - -#endif |