1ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com 2ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com/* 3ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com * Copyright 2006 The Android Open Source Project 4ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com * 5ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com * Use of this source code is governed by a BSD-style license that can be 6ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com * found in the LICENSE file. 7ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com */ 8ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com 98a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 108a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkBlurMask.h" 11889bd8bd7f604acae0a6303365bc82c06da1e6f3tomhudson@google.com#include "SkMath.h" 128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkTemplates.h" 1301224d5d0a3228fe47e63d8346e0e433a87563a8tomhudson@google.com#include "SkEndian.h" 1401224d5d0a3228fe47e63d8346e0e433a87563a8tomhudson@google.com 157ce661d19c5cf4484305a1b20c44bd111f129847robertphillips@google.com 16daaafa6e81860e3dc52660ba019c336f0a43f1e7reed@google.com// This constant approximates the scaling done in the software path's 17daaafa6e81860e3dc52660ba019c336f0a43f1e7reed@google.com// "high quality" mode, in SkBlurMask::Blur() (1 / sqrt(3)). 18daaafa6e81860e3dc52660ba019c336f0a43f1e7reed@google.com// IMHO, it actually should be 1: we blur "less" than we should do 19daaafa6e81860e3dc52660ba019c336f0a43f1e7reed@google.com// according to the CSS and canvas specs, simply because Safari does the same. 20daaafa6e81860e3dc52660ba019c336f0a43f1e7reed@google.com// Firefox used to do the same too, until 4.0 where they fixed it. So at some 21daaafa6e81860e3dc52660ba019c336f0a43f1e7reed@google.com// point we should probably get rid of these scaling constants and rebaseline 22daaafa6e81860e3dc52660ba019c336f0a43f1e7reed@google.com// all the blur tests. 23daaafa6e81860e3dc52660ba019c336f0a43f1e7reed@google.comstatic const SkScalar kBLUR_SIGMA_SCALE = 0.57735f; 24daaafa6e81860e3dc52660ba019c336f0a43f1e7reed@google.com 257ce661d19c5cf4484305a1b20c44bd111f129847robertphillips@google.comSkScalar SkBlurMask::ConvertRadiusToSigma(SkScalar radius) { 26daaafa6e81860e3dc52660ba019c336f0a43f1e7reed@google.com return radius > 0 ? kBLUR_SIGMA_SCALE * radius + 0.5f : 0.0f; 27daaafa6e81860e3dc52660ba019c336f0a43f1e7reed@google.com} 28daaafa6e81860e3dc52660ba019c336f0a43f1e7reed@google.com 29daaafa6e81860e3dc52660ba019c336f0a43f1e7reed@google.comSkScalar SkBlurMask::ConvertSigmaToRadius(SkScalar sigma) { 30daaafa6e81860e3dc52660ba019c336f0a43f1e7reed@google.com return sigma > 0.5f ? (sigma - 0.5f) / kBLUR_SIGMA_SCALE : 0.0f; 317ce661d19c5cf4484305a1b20c44bd111f129847robertphillips@google.com} 327c7292c6071898d73dc935c3b66b9816183806f0humper@google.com 339b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org#define UNROLL_SEPARABLE_LOOPS 349b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org 35908276b3969cf8f8eec28026363897134c0e54e0senorblanco@chromium.org/** 36908276b3969cf8f8eec28026363897134c0e54e0senorblanco@chromium.org * This function performs a box blur in X, of the given radius. If the 37884e60be30e20f38b3466a4697081187d2f1f814skia.committer@gmail.com * "transpose" parameter is true, it will transpose the pixels on write, 38908276b3969cf8f8eec28026363897134c0e54e0senorblanco@chromium.org * such that X and Y are swapped. Reads are always performed from contiguous 39908276b3969cf8f8eec28026363897134c0e54e0senorblanco@chromium.org * memory in X, for speed. The destination buffer (dst) must be at least 409b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org * (width + leftRadius + rightRadius) * height bytes in size. 414a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * 424a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * This is what the inner loop looks like before unrolling, and with the two 434a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * cases broken out separately (width < diameter, width >= diameter): 4476bf70d38fd109a09ee44d074cfd392e1884afffskia.committer@gmail.com * 454a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * if (width < diameter) { 464a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * for (int x = 0; x < width; ++x) { 474a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * sum += *right++; 4876bf70d38fd109a09ee44d074cfd392e1884afffskia.committer@gmail.com * *dptr = (sum * scale + half) >> 24; 494a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * dptr += dst_x_stride; 504a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * } 514a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * for (int x = width; x < diameter; ++x) { 524a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * *dptr = (sum * scale + half) >> 24; 534a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * dptr += dst_x_stride; 544a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * } 554a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * for (int x = 0; x < width; ++x) { 564a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * *dptr = (sum * scale + half) >> 24; 574a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * sum -= *left++; 584a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * dptr += dst_x_stride; 594a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * } 604a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * } else { 614a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * for (int x = 0; x < diameter; ++x) { 624a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * sum += *right++; 634a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * *dptr = (sum * scale + half) >> 24; 644a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * dptr += dst_x_stride; 654a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * } 664a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * for (int x = diameter; x < width; ++x) { 674a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * sum += *right++; 684a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * *dptr = (sum * scale + half) >> 24; 694a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * sum -= *left++; 704a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * dptr += dst_x_stride; 714a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * } 724a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * for (int x = 0; x < diameter; ++x) { 734a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * *dptr = (sum * scale + half) >> 24; 744a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * sum -= *left++; 754a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * dptr += dst_x_stride; 764a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * } 774a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * } 78908276b3969cf8f8eec28026363897134c0e54e0senorblanco@chromium.org */ 79908276b3969cf8f8eec28026363897134c0e54e0senorblanco@chromium.orgstatic int boxBlur(const uint8_t* src, int src_y_stride, uint8_t* dst, 80c4381309649c5cf338dcf6a7fc8296451a686d6bsenorblanco@chromium.org int leftRadius, int rightRadius, int width, int height, 81c4381309649c5cf338dcf6a7fc8296451a686d6bsenorblanco@chromium.org bool transpose) 8271f0f34f7d8e80fe760f318f29ba88ab58baff7dsenorblanco@chromium.org{ 839b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org int diameter = leftRadius + rightRadius; 849b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org int kernelSize = diameter + 1; 859b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org int border = SkMin32(width, diameter); 8671f0f34f7d8e80fe760f318f29ba88ab58baff7dsenorblanco@chromium.org uint32_t scale = (1 << 24) / kernelSize; 87c4381309649c5cf338dcf6a7fc8296451a686d6bsenorblanco@chromium.org int new_width = width + SkMax32(leftRadius, rightRadius) * 2; 88908276b3969cf8f8eec28026363897134c0e54e0senorblanco@chromium.org int dst_x_stride = transpose ? height : 1; 89908276b3969cf8f8eec28026363897134c0e54e0senorblanco@chromium.org int dst_y_stride = transpose ? 1 : new_width; 904a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org uint32_t half = 1 << 23; 9171f0f34f7d8e80fe760f318f29ba88ab58baff7dsenorblanco@chromium.org for (int y = 0; y < height; ++y) { 924a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org uint32_t sum = 0; 93908276b3969cf8f8eec28026363897134c0e54e0senorblanco@chromium.org uint8_t* dptr = dst + y * dst_y_stride; 94908276b3969cf8f8eec28026363897134c0e54e0senorblanco@chromium.org const uint8_t* right = src + y * src_y_stride; 95908276b3969cf8f8eec28026363897134c0e54e0senorblanco@chromium.org const uint8_t* left = right; 96336b4da6b0d20f27f9980b03415354a2f0698e18senorblanco@chromium.org for (int x = 0; x < rightRadius - leftRadius; x++) { 97336b4da6b0d20f27f9980b03415354a2f0698e18senorblanco@chromium.org *dptr = 0; 98336b4da6b0d20f27f9980b03415354a2f0698e18senorblanco@chromium.org dptr += dst_x_stride; 99c4381309649c5cf338dcf6a7fc8296451a686d6bsenorblanco@chromium.org } 1009b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org#define LEFT_BORDER_ITER \ 1019b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org sum += *right++; \ 1024a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org *dptr = (sum * scale + half) >> 24; \ 103908276b3969cf8f8eec28026363897134c0e54e0senorblanco@chromium.org dptr += dst_x_stride; 1049b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org 1059b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org int x = 0; 1069b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org#ifdef UNROLL_SEPARABLE_LOOPS 1079b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org for (; x < border - 16; x += 16) { 1089b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org LEFT_BORDER_ITER 1099b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org LEFT_BORDER_ITER 1109b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org LEFT_BORDER_ITER 1119b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org LEFT_BORDER_ITER 1129b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org LEFT_BORDER_ITER 1139b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org LEFT_BORDER_ITER 1149b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org LEFT_BORDER_ITER 1159b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org LEFT_BORDER_ITER 1169b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org LEFT_BORDER_ITER 1179b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org LEFT_BORDER_ITER 1189b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org LEFT_BORDER_ITER 1199b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org LEFT_BORDER_ITER 1209b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org LEFT_BORDER_ITER 1219b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org LEFT_BORDER_ITER 1229b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org LEFT_BORDER_ITER 1239b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org LEFT_BORDER_ITER 12471f0f34f7d8e80fe760f318f29ba88ab58baff7dsenorblanco@chromium.org } 1259b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org#endif 1269b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org for (; x < border; ++x) { 1279b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org LEFT_BORDER_ITER 1289b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org } 1299b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org#undef LEFT_BORDER_ITER 1309b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org#define TRIVIAL_ITER \ 1314a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org *dptr = (sum * scale + half) >> 24; \ 132908276b3969cf8f8eec28026363897134c0e54e0senorblanco@chromium.org dptr += dst_x_stride; 1339b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org x = width; 1349b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org#ifdef UNROLL_SEPARABLE_LOOPS 1359b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org for (; x < diameter - 16; x += 16) { 1369b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org TRIVIAL_ITER 1379b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org TRIVIAL_ITER 1389b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org TRIVIAL_ITER 1399b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org TRIVIAL_ITER 1409b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org TRIVIAL_ITER 1419b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org TRIVIAL_ITER 1429b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org TRIVIAL_ITER 1439b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org TRIVIAL_ITER 1449b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org TRIVIAL_ITER 1459b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org TRIVIAL_ITER 1469b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org TRIVIAL_ITER 1479b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org TRIVIAL_ITER 1489b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org TRIVIAL_ITER 1499b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org TRIVIAL_ITER 1509b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org TRIVIAL_ITER 1519b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org TRIVIAL_ITER 1529b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org } 1539b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org#endif 1549b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org for (; x < diameter; ++x) { 1559b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org TRIVIAL_ITER 15671f0f34f7d8e80fe760f318f29ba88ab58baff7dsenorblanco@chromium.org } 1579b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org#undef TRIVIAL_ITER 1589b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org#define CENTER_ITER \ 1599b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org sum += *right++; \ 1604a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org *dptr = (sum * scale + half) >> 24; \ 1619b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org sum -= *left++; \ 162908276b3969cf8f8eec28026363897134c0e54e0senorblanco@chromium.org dptr += dst_x_stride; 1639b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org 1649b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org x = diameter; 1659b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org#ifdef UNROLL_SEPARABLE_LOOPS 1669b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org for (; x < width - 16; x += 16) { 1679b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org CENTER_ITER 1689b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org CENTER_ITER 1699b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org CENTER_ITER 1709b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org CENTER_ITER 1719b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org CENTER_ITER 1729b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org CENTER_ITER 1739b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org CENTER_ITER 1749b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org CENTER_ITER 1759b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org CENTER_ITER 1769b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org CENTER_ITER 1779b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org CENTER_ITER 1789b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org CENTER_ITER 1799b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org CENTER_ITER 1809b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org CENTER_ITER 1819b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org CENTER_ITER 1829b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org CENTER_ITER 1839b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org } 1849b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org#endif 1859b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org for (; x < width; ++x) { 1869b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org CENTER_ITER 18771f0f34f7d8e80fe760f318f29ba88ab58baff7dsenorblanco@chromium.org } 1889b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org#undef CENTER_ITER 1899b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org#define RIGHT_BORDER_ITER \ 1904a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org *dptr = (sum * scale + half) >> 24; \ 1919b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org sum -= *left++; \ 192908276b3969cf8f8eec28026363897134c0e54e0senorblanco@chromium.org dptr += dst_x_stride; 1939b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org 1949b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org x = 0; 1959b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org#ifdef UNROLL_SEPARABLE_LOOPS 1969b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org for (; x < border - 16; x += 16) { 1979b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org RIGHT_BORDER_ITER 1989b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org RIGHT_BORDER_ITER 1999b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org RIGHT_BORDER_ITER 2009b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org RIGHT_BORDER_ITER 2019b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org RIGHT_BORDER_ITER 2029b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org RIGHT_BORDER_ITER 2039b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org RIGHT_BORDER_ITER 2049b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org RIGHT_BORDER_ITER 2059b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org RIGHT_BORDER_ITER 2069b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org RIGHT_BORDER_ITER 2079b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org RIGHT_BORDER_ITER 2089b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org RIGHT_BORDER_ITER 2099b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org RIGHT_BORDER_ITER 2109b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org RIGHT_BORDER_ITER 2119b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org RIGHT_BORDER_ITER 2129b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org RIGHT_BORDER_ITER 2139b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org } 2149b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org#endif 2159b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org for (; x < border; ++x) { 2169b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org RIGHT_BORDER_ITER 21771f0f34f7d8e80fe760f318f29ba88ab58baff7dsenorblanco@chromium.org } 2189b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org#undef RIGHT_BORDER_ITER 219a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com for (int x = 0; x < leftRadius - rightRadius; ++x) { 220336b4da6b0d20f27f9980b03415354a2f0698e18senorblanco@chromium.org *dptr = 0; 221336b4da6b0d20f27f9980b03415354a2f0698e18senorblanco@chromium.org dptr += dst_x_stride; 222c4381309649c5cf338dcf6a7fc8296451a686d6bsenorblanco@chromium.org } 22371f0f34f7d8e80fe760f318f29ba88ab58baff7dsenorblanco@chromium.org SkASSERT(sum == 0); 22471f0f34f7d8e80fe760f318f29ba88ab58baff7dsenorblanco@chromium.org } 225908276b3969cf8f8eec28026363897134c0e54e0senorblanco@chromium.org return new_width; 22671f0f34f7d8e80fe760f318f29ba88ab58baff7dsenorblanco@chromium.org} 22771f0f34f7d8e80fe760f318f29ba88ab58baff7dsenorblanco@chromium.org 2289b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org/** 2299b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org * This variant of the box blur handles blurring of non-integer radii. It 2309b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org * keeps two running sums: an outer sum for the rounded-up kernel radius, and 2319b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org * an inner sum for the rounded-down kernel radius. For each pixel, it linearly 2329b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org * interpolates between them. In float this would be: 2339b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org * outer_weight * outer_sum / kernelSize + 2349b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org * (1.0 - outer_weight) * innerSum / (kernelSize - 2) 23576bf70d38fd109a09ee44d074cfd392e1884afffskia.committer@gmail.com * 2364a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * This is what the inner loop looks like before unrolling, and with the two 2374a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * cases broken out separately (width < diameter, width >= diameter): 23876bf70d38fd109a09ee44d074cfd392e1884afffskia.committer@gmail.com * 2394a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * if (width < diameter) { 2404a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * for (int x = 0; x < width; x++) { 2414a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * inner_sum = outer_sum; 2424a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * outer_sum += *right++; 2434a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * *dptr = (outer_sum * outer_scale + inner_sum * inner_scale + half) >> 24; 2444a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * dptr += dst_x_stride; 2454a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * } 2464a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * for (int x = width; x < diameter; ++x) { 2474a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * *dptr = (outer_sum * outer_scale + inner_sum * inner_scale + half) >> 24; 2484a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * dptr += dst_x_stride; 2494a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * } 2504a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * for (int x = 0; x < width; x++) { 2514a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * inner_sum = outer_sum - *left++; 2524a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * *dptr = (outer_sum * outer_scale + inner_sum * inner_scale + half) >> 24; 2534a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * dptr += dst_x_stride; 2544a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * outer_sum = inner_sum; 2554a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * } 2564a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * } else { 2574a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * for (int x = 0; x < diameter; x++) { 2584a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * inner_sum = outer_sum; 2594a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * outer_sum += *right++; 2604a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * *dptr = (outer_sum * outer_scale + inner_sum * inner_scale + half) >> 24; 2614a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * dptr += dst_x_stride; 2624a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * } 2634a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * for (int x = diameter; x < width; ++x) { 2644a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * inner_sum = outer_sum - *left; 2654a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * outer_sum += *right++; 2664a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * *dptr = (outer_sum * outer_scale + inner_sum * inner_scale + half) >> 24; 2674a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * dptr += dst_x_stride; 2684a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * outer_sum -= *left++; 2694a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * } 2704a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * for (int x = 0; x < diameter; x++) { 2714a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * inner_sum = outer_sum - *left++; 2724a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * *dptr = (outer_sum * outer_scale + inner_sum * inner_scale + half) >> 24; 2734a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * dptr += dst_x_stride; 2744a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * outer_sum = inner_sum; 2754a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * } 2764a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * } 2774a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * } 2784a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org * return new_width; 2799b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org */ 2804a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org 2819b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.orgstatic int boxBlurInterp(const uint8_t* src, int src_y_stride, uint8_t* dst, 2829b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org int radius, int width, int height, 2839b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org bool transpose, uint8_t outer_weight) 2849b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org{ 2859b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org int diameter = radius * 2; 2869b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org int kernelSize = diameter + 1; 2879b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org int border = SkMin32(width, diameter); 2889b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org int inner_weight = 255 - outer_weight; 2899b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org outer_weight += outer_weight >> 7; 2909b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org inner_weight += inner_weight >> 7; 2919b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org uint32_t outer_scale = (outer_weight << 16) / kernelSize; 2929b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org uint32_t inner_scale = (inner_weight << 16) / (kernelSize - 2); 2934a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org uint32_t half = 1 << 23; 2949b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org int new_width = width + diameter; 2959b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org int dst_x_stride = transpose ? height : 1; 2969b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org int dst_y_stride = transpose ? 1 : new_width; 2979b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org for (int y = 0; y < height; ++y) { 2984a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org uint32_t outer_sum = 0, inner_sum = 0; 2999b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org uint8_t* dptr = dst + y * dst_y_stride; 3009b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org const uint8_t* right = src + y * src_y_stride; 3019b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org const uint8_t* left = right; 3029b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org int x = 0; 3039b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org 3049b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org#define LEFT_BORDER_ITER \ 3059b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org inner_sum = outer_sum; \ 3069b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org outer_sum += *right++; \ 3074a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org *dptr = (outer_sum * outer_scale + inner_sum * inner_scale + half) >> 24; \ 3089b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org dptr += dst_x_stride; 3099b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org 3109b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org#ifdef UNROLL_SEPARABLE_LOOPS 3119b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org for (;x < border - 16; x += 16) { 3129b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org LEFT_BORDER_ITER 3139b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org LEFT_BORDER_ITER 3149b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org LEFT_BORDER_ITER 3159b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org LEFT_BORDER_ITER 3169b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org LEFT_BORDER_ITER 3179b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org LEFT_BORDER_ITER 3189b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org LEFT_BORDER_ITER 3199b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org LEFT_BORDER_ITER 3209b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org LEFT_BORDER_ITER 3219b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org LEFT_BORDER_ITER 3229b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org LEFT_BORDER_ITER 3239b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org LEFT_BORDER_ITER 3249b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org LEFT_BORDER_ITER 3259b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org LEFT_BORDER_ITER 3269b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org LEFT_BORDER_ITER 3279b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org LEFT_BORDER_ITER 3289b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org } 3299b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org#endif 3309b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org 331a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com for (;x < border; ++x) { 3329b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org LEFT_BORDER_ITER 3339b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org } 3349b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org#undef LEFT_BORDER_ITER 3359b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org for (int x = width; x < diameter; ++x) { 3364a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org *dptr = (outer_sum * outer_scale + inner_sum * inner_scale + half) >> 24; 3379b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org dptr += dst_x_stride; 3389b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org } 3399b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org x = diameter; 3409b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org 3419b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org#define CENTER_ITER \ 3429b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org inner_sum = outer_sum - *left; \ 3439b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org outer_sum += *right++; \ 3444a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org *dptr = (outer_sum * outer_scale + inner_sum * inner_scale + half) >> 24; \ 3459b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org dptr += dst_x_stride; \ 3469b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org outer_sum -= *left++; 3479b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org 3489b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org#ifdef UNROLL_SEPARABLE_LOOPS 3499b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org for (; x < width - 16; x += 16) { 3509b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org CENTER_ITER 3519b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org CENTER_ITER 3529b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org CENTER_ITER 3539b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org CENTER_ITER 3549b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org CENTER_ITER 3559b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org CENTER_ITER 3569b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org CENTER_ITER 3579b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org CENTER_ITER 3589b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org CENTER_ITER 3599b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org CENTER_ITER 3609b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org CENTER_ITER 3619b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org CENTER_ITER 3629b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org CENTER_ITER 3639b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org CENTER_ITER 3649b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org CENTER_ITER 3659b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org CENTER_ITER 3669b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org } 3679b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org#endif 3689b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org for (; x < width; ++x) { 3699b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org CENTER_ITER 3709b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org } 3719b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org#undef CENTER_ITER 3729b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org 3739b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org #define RIGHT_BORDER_ITER \ 3749b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org inner_sum = outer_sum - *left++; \ 3754a525d7fc2cc0d8029bc66095730ddba3df3cb9esenorblanco@chromium.org *dptr = (outer_sum * outer_scale + inner_sum * inner_scale + half) >> 24; \ 3769b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org dptr += dst_x_stride; \ 3779b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org outer_sum = inner_sum; 3789b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org 3799b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org x = 0; 3809b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org#ifdef UNROLL_SEPARABLE_LOOPS 3819b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org for (; x < border - 16; x += 16) { 3829b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org RIGHT_BORDER_ITER 3839b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org RIGHT_BORDER_ITER 3849b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org RIGHT_BORDER_ITER 3859b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org RIGHT_BORDER_ITER 3869b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org RIGHT_BORDER_ITER 3879b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org RIGHT_BORDER_ITER 3889b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org RIGHT_BORDER_ITER 3899b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org RIGHT_BORDER_ITER 3909b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org RIGHT_BORDER_ITER 3919b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org RIGHT_BORDER_ITER 3929b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org RIGHT_BORDER_ITER 3939b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org RIGHT_BORDER_ITER 3949b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org RIGHT_BORDER_ITER 3959b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org RIGHT_BORDER_ITER 3969b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org RIGHT_BORDER_ITER 3979b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org RIGHT_BORDER_ITER 3989b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org } 3999b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org#endif 400a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com for (; x < border; ++x) { 4019b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org RIGHT_BORDER_ITER 4029b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org } 4039b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org#undef RIGHT_BORDER_ITER 4049b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org SkASSERT(outer_sum == 0 && inner_sum == 0); 4059b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org } 4069b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org return new_width; 4079b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org} 4089b0d4d79f023ce91b53d9eaa47508b6722c246e6senorblanco@chromium.org 409c4381309649c5cf338dcf6a7fc8296451a686d6bsenorblanco@chromium.orgstatic void get_adjusted_radii(SkScalar passRadius, int *loRadius, int *hiRadius) 410c4381309649c5cf338dcf6a7fc8296451a686d6bsenorblanco@chromium.org{ 411e1ca705cac4b946993f6cbf798e2a0ba27e739f3reed@google.com *loRadius = *hiRadius = SkScalarCeilToInt(passRadius); 4124b413c8bb123e42ca4b9c7bfa6bc2167283cb84ccommit-bot@chromium.org if (SkIntToScalar(*hiRadius) - passRadius > 0.5f) { 413c4381309649c5cf338dcf6a7fc8296451a686d6bsenorblanco@chromium.org *loRadius = *hiRadius - 1; 414c4381309649c5cf338dcf6a7fc8296451a686d6bsenorblanco@chromium.org } 415c4381309649c5cf338dcf6a7fc8296451a686d6bsenorblanco@chromium.org} 416c4381309649c5cf338dcf6a7fc8296451a686d6bsenorblanco@chromium.org 4178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkColorPriv.h" 4188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 4190e3c664250f561ec9f7107b92136517a72d03afdreed@android.comstatic void merge_src_with_blur(uint8_t dst[], int dstRB, 4200e3c664250f561ec9f7107b92136517a72d03afdreed@android.com const uint8_t src[], int srcRB, 4210e3c664250f561ec9f7107b92136517a72d03afdreed@android.com const uint8_t blur[], int blurRB, 4220e3c664250f561ec9f7107b92136517a72d03afdreed@android.com int sw, int sh) { 4230e3c664250f561ec9f7107b92136517a72d03afdreed@android.com dstRB -= sw; 4240e3c664250f561ec9f7107b92136517a72d03afdreed@android.com srcRB -= sw; 4250e3c664250f561ec9f7107b92136517a72d03afdreed@android.com blurRB -= sw; 4260e3c664250f561ec9f7107b92136517a72d03afdreed@android.com while (--sh >= 0) { 4270e3c664250f561ec9f7107b92136517a72d03afdreed@android.com for (int x = sw - 1; x >= 0; --x) { 4288a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com *dst = SkToU8(SkAlphaMul(*blur, SkAlpha255To256(*src))); 4298a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com dst += 1; 4308a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com src += 1; 4318a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com blur += 1; 4328a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 4330e3c664250f561ec9f7107b92136517a72d03afdreed@android.com dst += dstRB; 4340e3c664250f561ec9f7107b92136517a72d03afdreed@android.com src += srcRB; 4350e3c664250f561ec9f7107b92136517a72d03afdreed@android.com blur += blurRB; 4368a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 4378a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com} 4388a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 4398a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comstatic void clamp_with_orig(uint8_t dst[], int dstRowBytes, 4400e3c664250f561ec9f7107b92136517a72d03afdreed@android.com const uint8_t src[], int srcRowBytes, 4410e3c664250f561ec9f7107b92136517a72d03afdreed@android.com int sw, int sh, 442e396455d2d60ddf8e625b5037254f3c09fbcdcf5commit-bot@chromium.org SkBlurStyle style) { 4438a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com int x; 4440e3c664250f561ec9f7107b92136517a72d03afdreed@android.com while (--sh >= 0) { 4458a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com switch (style) { 446e396455d2d60ddf8e625b5037254f3c09fbcdcf5commit-bot@chromium.org case kSolid_SkBlurStyle: 4470e3c664250f561ec9f7107b92136517a72d03afdreed@android.com for (x = sw - 1; x >= 0; --x) { 4480e3c664250f561ec9f7107b92136517a72d03afdreed@android.com int s = *src; 4490e3c664250f561ec9f7107b92136517a72d03afdreed@android.com int d = *dst; 4500e3c664250f561ec9f7107b92136517a72d03afdreed@android.com *dst = SkToU8(s + d - SkMulDiv255Round(s, d)); 4518a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com dst += 1; 4528a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com src += 1; 4538a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 4548a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com break; 455e396455d2d60ddf8e625b5037254f3c09fbcdcf5commit-bot@chromium.org case kOuter_SkBlurStyle: 4560e3c664250f561ec9f7107b92136517a72d03afdreed@android.com for (x = sw - 1; x >= 0; --x) { 4570e3c664250f561ec9f7107b92136517a72d03afdreed@android.com if (*src) { 4588a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com *dst = SkToU8(SkAlphaMul(*dst, SkAlpha255To256(255 - *src))); 4590e3c664250f561ec9f7107b92136517a72d03afdreed@android.com } 4608a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com dst += 1; 4618a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com src += 1; 4628a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 4638a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com break; 4648a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com default: 4650c00f21fee3f5cfa3aa7e5d46ff94cb8cf340451tomhudson@google.com SkDEBUGFAIL("Unexpected blur style here"); 4668a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com break; 4678a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 4688a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com dst += dstRowBytes - sw; 4690e3c664250f561ec9f7107b92136517a72d03afdreed@android.com src += srcRowBytes - sw; 4708a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 4718a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com} 4728a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 47303016a36206be42e91e8e0eb62fe8fb95da97b38reed@google.com/////////////////////////////////////////////////////////////////////////////// 4748a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 47533cdbdea3ddcec9323b65eace86e10557312ae9bbsalomon@google.com// we use a local function to wrap the class static method to work around 4768a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com// a bug in gcc98 4778a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comvoid SkMask_FreeImage(uint8_t* image); 47803016a36206be42e91e8e0eb62fe8fb95da97b38reed@google.comvoid SkMask_FreeImage(uint8_t* image) { 4798a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkMask::FreeImage(image); 4808a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com} 4818a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 4823d8bf232bd2e4903d2ee2bb575637e7555361604commit-bot@chromium.orgbool SkBlurMask::BoxBlur(SkMask* dst, const SkMask& src, 4833d8bf232bd2e4903d2ee2bb575637e7555361604commit-bot@chromium.org SkScalar sigma, SkBlurStyle style, SkBlurQuality quality, 4843d8bf232bd2e4903d2ee2bb575637e7555361604commit-bot@chromium.org SkIPoint* margin, bool force_quality) { 4853d8bf232bd2e4903d2ee2bb575637e7555361604commit-bot@chromium.org 48603016a36206be42e91e8e0eb62fe8fb95da97b38reed@google.com if (src.fFormat != SkMask::kA8_Format) { 4878a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com return false; 48803016a36206be42e91e8e0eb62fe8fb95da97b38reed@google.com } 4898a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 4904868e6b221a4a98e40f977851af5fcf09631ea15senorblanco@chromium.org // Force high quality off for small radii (performance) 4913d8bf232bd2e4903d2ee2bb575637e7555361604commit-bot@chromium.org if (!force_quality && sigma <= SkIntToScalar(2)) { 492e396455d2d60ddf8e625b5037254f3c09fbcdcf5commit-bot@chromium.org quality = kLow_SkBlurQuality; 49391f489a65d436d36c7fe580af2775cd0cd13c8d2senorblanco@chromium.org } 494d454ec135eeef48edea7ebc47a61ff39bd654576skia.committer@gmail.com 4957ce661d19c5cf4484305a1b20c44bd111f129847robertphillips@google.com SkScalar passRadius; 496e396455d2d60ddf8e625b5037254f3c09fbcdcf5commit-bot@chromium.org if (kHigh_SkBlurQuality == quality) { 4977ce661d19c5cf4484305a1b20c44bd111f129847robertphillips@google.com // For the high quality path the 3 pass box blur kernel width is 4987ce661d19c5cf4484305a1b20c44bd111f129847robertphillips@google.com // 6*rad+1 while the full Gaussian width is 6*sigma. 4997ce661d19c5cf4484305a1b20c44bd111f129847robertphillips@google.com passRadius = sigma - (1/6.0f); 5007ce661d19c5cf4484305a1b20c44bd111f129847robertphillips@google.com } else { 5017bd141dce43ea3405bc60c9c84e6f910b851b079skia.committer@gmail.com // For the low quality path we only attempt to cover 3*sigma of the 5027bd141dce43ea3405bc60c9c84e6f910b851b079skia.committer@gmail.com // Gaussian blur area (1.5*sigma on each side). The single pass box 5037ce661d19c5cf4484305a1b20c44bd111f129847robertphillips@google.com // blur's kernel size is 2*rad+1. 5047ce661d19c5cf4484305a1b20c44bd111f129847robertphillips@google.com passRadius = 1.5f*sigma - 0.5f; 5057ce661d19c5cf4484305a1b20c44bd111f129847robertphillips@google.com } 5067ce661d19c5cf4484305a1b20c44bd111f129847robertphillips@google.com 507d454ec135eeef48edea7ebc47a61ff39bd654576skia.committer@gmail.com // highQuality: use three box blur passes as a cheap way 508a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com // to approximate a Gaussian blur 509e396455d2d60ddf8e625b5037254f3c09fbcdcf5commit-bot@chromium.org int passCount = (kHigh_SkBlurQuality == quality) ? 3 : 1; 510a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com 511e1ca705cac4b946993f6cbf798e2a0ba27e739f3reed@google.com int rx = SkScalarCeilToInt(passRadius); 512e1ca705cac4b946993f6cbf798e2a0ba27e739f3reed@google.com int outerWeight = 255 - SkScalarRoundToInt((SkIntToScalar(rx) - passRadius) * 255); 5138a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 5148a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkASSERT(rx >= 0); 515a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com SkASSERT((unsigned)outerWeight <= 255); 5160e3c664250f561ec9f7107b92136517a72d03afdreed@android.com if (rx <= 0) { 5178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com return false; 5180e3c664250f561ec9f7107b92136517a72d03afdreed@android.com } 5198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 5208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com int ry = rx; // only do square blur for now 5218a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 5224868e6b221a4a98e40f977851af5fcf09631ea15senorblanco@chromium.org int padx = passCount * rx; 5234868e6b221a4a98e40f977851af5fcf09631ea15senorblanco@chromium.org int pady = passCount * ry; 524d454ec135eeef48edea7ebc47a61ff39bd654576skia.committer@gmail.com 5255af16f8d670b3ce1c7644a4737e02e2e2257614ebungeman@google.com if (margin) { 5265af16f8d670b3ce1c7644a4737e02e2e2257614ebungeman@google.com margin->set(padx, pady); 5275af16f8d670b3ce1c7644a4737e02e2e2257614ebungeman@google.com } 5284868e6b221a4a98e40f977851af5fcf09631ea15senorblanco@chromium.org dst->fBounds.set(src.fBounds.fLeft - padx, src.fBounds.fTop - pady, 5297ce661d19c5cf4484305a1b20c44bd111f129847robertphillips@google.com src.fBounds.fRight + padx, src.fBounds.fBottom + pady); 530d454ec135eeef48edea7ebc47a61ff39bd654576skia.committer@gmail.com 53149f0ff25a046d6001dc2d095b6fa3c30f0f46b6areed@android.com dst->fRowBytes = dst->fBounds.width(); 5328a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com dst->fFormat = SkMask::kA8_Format; 5338a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com dst->fImage = NULL; 5348a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 5350e3c664250f561ec9f7107b92136517a72d03afdreed@android.com if (src.fImage) { 536543ed9352c7dfd93071c08b14930cca2e82a08d4reed@android.com size_t dstSize = dst->computeImageSize(); 537543ed9352c7dfd93071c08b14930cca2e82a08d4reed@android.com if (0 == dstSize) { 538543ed9352c7dfd93071c08b14930cca2e82a08d4reed@android.com return false; // too big to allocate, abort 539543ed9352c7dfd93071c08b14930cca2e82a08d4reed@android.com } 540543ed9352c7dfd93071c08b14930cca2e82a08d4reed@android.com 5418a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com int sw = src.fBounds.width(); 5428a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com int sh = src.fBounds.height(); 5438a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com const uint8_t* sp = src.fImage; 544543ed9352c7dfd93071c08b14930cca2e82a08d4reed@android.com uint8_t* dp = SkMask::AllocImage(dstSize); 5458a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkAutoTCallVProc<uint8_t, SkMask_FreeImage> autoCall(dp); 5468a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 5478a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com // build the blurry destination 5480a1c3872de6642ada98bd7226ff9ed14750241b9commit-bot@chromium.org SkAutoTMalloc<uint8_t> tmpBuffer(dstSize); 5490a1c3872de6642ada98bd7226ff9ed14750241b9commit-bot@chromium.org uint8_t* tp = tmpBuffer.get(); 5500a1c3872de6642ada98bd7226ff9ed14750241b9commit-bot@chromium.org int w = sw, h = sh; 551d454ec135eeef48edea7ebc47a61ff39bd654576skia.committer@gmail.com 5520a1c3872de6642ada98bd7226ff9ed14750241b9commit-bot@chromium.org if (outerWeight == 255) { 5530a1c3872de6642ada98bd7226ff9ed14750241b9commit-bot@chromium.org int loRadius, hiRadius; 5540a1c3872de6642ada98bd7226ff9ed14750241b9commit-bot@chromium.org get_adjusted_radii(passRadius, &loRadius, &hiRadius); 555e396455d2d60ddf8e625b5037254f3c09fbcdcf5commit-bot@chromium.org if (kHigh_SkBlurQuality == quality) { 5560a1c3872de6642ada98bd7226ff9ed14750241b9commit-bot@chromium.org // Do three X blurs, with a transpose on the final one. 5570a1c3872de6642ada98bd7226ff9ed14750241b9commit-bot@chromium.org w = boxBlur(sp, src.fRowBytes, tp, loRadius, hiRadius, w, h, false); 5580a1c3872de6642ada98bd7226ff9ed14750241b9commit-bot@chromium.org w = boxBlur(tp, w, dp, hiRadius, loRadius, w, h, false); 5590a1c3872de6642ada98bd7226ff9ed14750241b9commit-bot@chromium.org w = boxBlur(dp, w, tp, hiRadius, hiRadius, w, h, true); 5600a1c3872de6642ada98bd7226ff9ed14750241b9commit-bot@chromium.org // Do three Y blurs, with a transpose on the final one. 5610a1c3872de6642ada98bd7226ff9ed14750241b9commit-bot@chromium.org h = boxBlur(tp, h, dp, loRadius, hiRadius, h, w, false); 5620a1c3872de6642ada98bd7226ff9ed14750241b9commit-bot@chromium.org h = boxBlur(dp, h, tp, hiRadius, loRadius, h, w, false); 5630a1c3872de6642ada98bd7226ff9ed14750241b9commit-bot@chromium.org h = boxBlur(tp, h, dp, hiRadius, hiRadius, h, w, true); 564908276b3969cf8f8eec28026363897134c0e54e0senorblanco@chromium.org } else { 5650a1c3872de6642ada98bd7226ff9ed14750241b9commit-bot@chromium.org w = boxBlur(sp, src.fRowBytes, tp, rx, rx, w, h, true); 5660a1c3872de6642ada98bd7226ff9ed14750241b9commit-bot@chromium.org h = boxBlur(tp, h, dp, ry, ry, h, w, true); 56771f0f34f7d8e80fe760f318f29ba88ab58baff7dsenorblanco@chromium.org } 56871f0f34f7d8e80fe760f318f29ba88ab58baff7dsenorblanco@chromium.org } else { 569e396455d2d60ddf8e625b5037254f3c09fbcdcf5commit-bot@chromium.org if (kHigh_SkBlurQuality == quality) { 5700a1c3872de6642ada98bd7226ff9ed14750241b9commit-bot@chromium.org // Do three X blurs, with a transpose on the final one. 5710a1c3872de6642ada98bd7226ff9ed14750241b9commit-bot@chromium.org w = boxBlurInterp(sp, src.fRowBytes, tp, rx, w, h, false, outerWeight); 5720a1c3872de6642ada98bd7226ff9ed14750241b9commit-bot@chromium.org w = boxBlurInterp(tp, w, dp, rx, w, h, false, outerWeight); 5730a1c3872de6642ada98bd7226ff9ed14750241b9commit-bot@chromium.org w = boxBlurInterp(dp, w, tp, rx, w, h, true, outerWeight); 5740a1c3872de6642ada98bd7226ff9ed14750241b9commit-bot@chromium.org // Do three Y blurs, with a transpose on the final one. 5750a1c3872de6642ada98bd7226ff9ed14750241b9commit-bot@chromium.org h = boxBlurInterp(tp, h, dp, ry, h, w, false, outerWeight); 5760a1c3872de6642ada98bd7226ff9ed14750241b9commit-bot@chromium.org h = boxBlurInterp(dp, h, tp, ry, h, w, false, outerWeight); 5770a1c3872de6642ada98bd7226ff9ed14750241b9commit-bot@chromium.org h = boxBlurInterp(tp, h, dp, ry, h, w, true, outerWeight); 5780a1c3872de6642ada98bd7226ff9ed14750241b9commit-bot@chromium.org } else { 5790a1c3872de6642ada98bd7226ff9ed14750241b9commit-bot@chromium.org w = boxBlurInterp(sp, src.fRowBytes, tp, rx, w, h, true, outerWeight); 5800a1c3872de6642ada98bd7226ff9ed14750241b9commit-bot@chromium.org h = boxBlurInterp(tp, h, dp, ry, h, w, true, outerWeight); 5814868e6b221a4a98e40f977851af5fcf09631ea15senorblanco@chromium.org } 5828a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 5838a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 5848a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com dst->fImage = dp; 5858a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com // if need be, alloc the "real" dst (same size as src) and copy/merge 5868a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com // the blur into it (applying the src) 587e396455d2d60ddf8e625b5037254f3c09fbcdcf5commit-bot@chromium.org if (style == kInner_SkBlurStyle) { 5880e3c664250f561ec9f7107b92136517a72d03afdreed@android.com // now we allocate the "real" dst, mirror the size of src 589543ed9352c7dfd93071c08b14930cca2e82a08d4reed@android.com size_t srcSize = src.computeImageSize(); 590543ed9352c7dfd93071c08b14930cca2e82a08d4reed@android.com if (0 == srcSize) { 591543ed9352c7dfd93071c08b14930cca2e82a08d4reed@android.com return false; // too big to allocate, abort 592543ed9352c7dfd93071c08b14930cca2e82a08d4reed@android.com } 593543ed9352c7dfd93071c08b14930cca2e82a08d4reed@android.com dst->fImage = SkMask::AllocImage(srcSize); 5940e3c664250f561ec9f7107b92136517a72d03afdreed@android.com merge_src_with_blur(dst->fImage, src.fRowBytes, 5950e3c664250f561ec9f7107b92136517a72d03afdreed@android.com sp, src.fRowBytes, 59603016a36206be42e91e8e0eb62fe8fb95da97b38reed@google.com dp + passCount * (rx + ry * dst->fRowBytes), 59703016a36206be42e91e8e0eb62fe8fb95da97b38reed@google.com dst->fRowBytes, sw, sh); 5988a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkMask::FreeImage(dp); 599e396455d2d60ddf8e625b5037254f3c09fbcdcf5commit-bot@chromium.org } else if (style != kNormal_SkBlurStyle) { 60003016a36206be42e91e8e0eb62fe8fb95da97b38reed@google.com clamp_with_orig(dp + passCount * (rx + ry * dst->fRowBytes), 60103016a36206be42e91e8e0eb62fe8fb95da97b38reed@google.com dst->fRowBytes, sp, src.fRowBytes, sw, sh, style); 6028a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 6038a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com (void)autoCall.detach(); 6048a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 6058a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 606e396455d2d60ddf8e625b5037254f3c09fbcdcf5commit-bot@chromium.org if (style == kInner_SkBlurStyle) { 6078a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com dst->fBounds = src.fBounds; // restore trimmed bounds 6080e3c664250f561ec9f7107b92136517a72d03afdreed@android.com dst->fRowBytes = src.fRowBytes; 6098a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 6108a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 6118a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com return true; 6128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com} 6138a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 6147c7292c6071898d73dc935c3b66b9816183806f0humper@google.com/* Convolving a box with itself three times results in a piecewise 6157c7292c6071898d73dc935c3b66b9816183806f0humper@google.com quadratic function: 6168ae714b186ae5f4eaddee239281fbfe7282320c9skia.committer@gmail.com 6177c7292c6071898d73dc935c3b66b9816183806f0humper@google.com 0 x <= -1.5 618a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com 9/8 + 3/2 x + 1/2 x^2 -1.5 < x <= -.5 6197c7292c6071898d73dc935c3b66b9816183806f0humper@google.com 3/4 - x^2 -.5 < x <= .5 6207c7292c6071898d73dc935c3b66b9816183806f0humper@google.com 9/8 - 3/2 x + 1/2 x^2 0.5 < x <= 1.5 6217c7292c6071898d73dc935c3b66b9816183806f0humper@google.com 0 1.5 < x 622d454ec135eeef48edea7ebc47a61ff39bd654576skia.committer@gmail.com 623a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com Mathematica: 624d454ec135eeef48edea7ebc47a61ff39bd654576skia.committer@gmail.com 625a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com g[x_] := Piecewise [ { 626a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com {9/8 + 3/2 x + 1/2 x^2 , -1.5 < x <= -.5}, 627a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com {3/4 - x^2 , -.5 < x <= .5}, 628a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com {9/8 - 3/2 x + 1/2 x^2 , 0.5 < x <= 1.5} 629a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com }, 0] 6308ae714b186ae5f4eaddee239281fbfe7282320c9skia.committer@gmail.com 6317c7292c6071898d73dc935c3b66b9816183806f0humper@google.com To get the profile curve of the blurred step function at the rectangle 6327c7292c6071898d73dc935c3b66b9816183806f0humper@google.com edge, we evaluate the indefinite integral, which is piecewise cubic: 6338ae714b186ae5f4eaddee239281fbfe7282320c9skia.committer@gmail.com 6347c7292c6071898d73dc935c3b66b9816183806f0humper@google.com 0 x <= -1.5 635a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com 9/16 + 9/8 x + 3/4 x^2 + 1/6 x^3 -1.5 < x <= -0.5 6367c7292c6071898d73dc935c3b66b9816183806f0humper@google.com 1/2 + 3/4 x - 1/3 x^3 -.5 < x <= .5 637a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com 7/16 + 9/8 x - 3/4 x^2 + 1/6 x^3 .5 < x <= 1.5 6387c7292c6071898d73dc935c3b66b9816183806f0humper@google.com 1 1.5 < x 639d454ec135eeef48edea7ebc47a61ff39bd654576skia.committer@gmail.com 640a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com in Mathematica code: 641d454ec135eeef48edea7ebc47a61ff39bd654576skia.committer@gmail.com 642a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com gi[x_] := Piecewise[ { 643a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com { 0 , x <= -1.5 }, 644a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com { 9/16 + 9/8 x + 3/4 x^2 + 1/6 x^3, -1.5 < x <= -0.5 }, 645a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com { 1/2 + 3/4 x - 1/3 x^3 , -.5 < x <= .5}, 646a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com { 7/16 + 9/8 x - 3/4 x^2 + 1/6 x^3, .5 < x <= 1.5} 647a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com },1] 6487c7292c6071898d73dc935c3b66b9816183806f0humper@google.com*/ 6497c7292c6071898d73dc935c3b66b9816183806f0humper@google.com 650a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.comstatic float gaussianIntegral(float x) { 651a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com if (x > 1.5f) { 6527c7292c6071898d73dc935c3b66b9816183806f0humper@google.com return 0.0f; 6537c7292c6071898d73dc935c3b66b9816183806f0humper@google.com } 654a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com if (x < -1.5f) { 6557c7292c6071898d73dc935c3b66b9816183806f0humper@google.com return 1.0f; 6567c7292c6071898d73dc935c3b66b9816183806f0humper@google.com } 6577c7292c6071898d73dc935c3b66b9816183806f0humper@google.com 6587c7292c6071898d73dc935c3b66b9816183806f0humper@google.com float x2 = x*x; 6597c7292c6071898d73dc935c3b66b9816183806f0humper@google.com float x3 = x2*x; 6607c7292c6071898d73dc935c3b66b9816183806f0humper@google.com 6619c4e5ac5b7d32151d4d8ab1fb7ed443b35eb1254jvanverth@google.com if ( x > 0.5f ) { 662a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com return 0.5625f - (x3 / 6.0f - 3.0f * x2 * 0.25f + 1.125f * x); 6637c7292c6071898d73dc935c3b66b9816183806f0humper@google.com } 6649c4e5ac5b7d32151d4d8ab1fb7ed443b35eb1254jvanverth@google.com if ( x > -0.5f ) { 6659c4e5ac5b7d32151d4d8ab1fb7ed443b35eb1254jvanverth@google.com return 0.5f - (0.75f * x - x3 / 3.0f); 6667c7292c6071898d73dc935c3b66b9816183806f0humper@google.com } 6679c4e5ac5b7d32151d4d8ab1fb7ed443b35eb1254jvanverth@google.com return 0.4375f + (-x3 / 6.0f - 3.0f * x2 * 0.25f - 1.125f * x); 6687c7292c6071898d73dc935c3b66b9816183806f0humper@google.com} 6697c7292c6071898d73dc935c3b66b9816183806f0humper@google.com 670cf34bc06347dd2734a7fdaef5cf8853e92979d5ecommit-bot@chromium.org/* ComputeBlurProfile allocates and fills in an array of floating 6718ae714b186ae5f4eaddee239281fbfe7282320c9skia.committer@gmail.com point values between 0 and 255 for the profile signature of 6727c7292c6071898d73dc935c3b66b9816183806f0humper@google.com a blurred half-plane with the given blur radius. Since we're 6737c7292c6071898d73dc935c3b66b9816183806f0humper@google.com going to be doing screened multiplications (i.e., 1 - (1-x)(1-y)) 6747c7292c6071898d73dc935c3b66b9816183806f0humper@google.com all the time, we actually fill in the profile pre-inverted 6757c7292c6071898d73dc935c3b66b9816183806f0humper@google.com (already done 255-x). 6768ae714b186ae5f4eaddee239281fbfe7282320c9skia.committer@gmail.com 6777c5d7b781385c47e5be9a343d60c5b7d33b5b8cdhumper@google.com It's the responsibility of the caller to delete the 6787c7292c6071898d73dc935c3b66b9816183806f0humper@google.com memory returned in profile_out. 6797c7292c6071898d73dc935c3b66b9816183806f0humper@google.com*/ 6807c7292c6071898d73dc935c3b66b9816183806f0humper@google.com 681cf34bc06347dd2734a7fdaef5cf8853e92979d5ecommit-bot@chromium.orgvoid SkBlurMask::ComputeBlurProfile(SkScalar sigma, uint8_t **profile_out) { 6827ce661d19c5cf4484305a1b20c44bd111f129847robertphillips@google.com int size = SkScalarCeilToInt(6*sigma); 6832e71f1619d9a2c51c1292e618f42a56ad2da1de8skia.committer@gmail.com 6847c7292c6071898d73dc935c3b66b9816183806f0humper@google.com int center = size >> 1; 685cf34bc06347dd2734a7fdaef5cf8853e92979d5ecommit-bot@chromium.org uint8_t *profile = SkNEW_ARRAY(uint8_t, size); 6867c7292c6071898d73dc935c3b66b9816183806f0humper@google.com 6877ce661d19c5cf4484305a1b20c44bd111f129847robertphillips@google.com float invr = 1.f/(2*sigma); 6887c7292c6071898d73dc935c3b66b9816183806f0humper@google.com 6897c7292c6071898d73dc935c3b66b9816183806f0humper@google.com profile[0] = 255; 690a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com for (int x = 1 ; x < size ; ++x) { 691d98df1a3c468a2a7a5fff5efbf6dbdaf077d1abejvanverth@google.com float scaled_x = (center - x - .5f) * invr; 692a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com float gi = gaussianIntegral(scaled_x); 693a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com profile[x] = 255 - (uint8_t) (255.f * gi); 6947c7292c6071898d73dc935c3b66b9816183806f0humper@google.com } 6957c7292c6071898d73dc935c3b66b9816183806f0humper@google.com 6967c7292c6071898d73dc935c3b66b9816183806f0humper@google.com *profile_out = profile; 6977c7292c6071898d73dc935c3b66b9816183806f0humper@google.com} 6987c7292c6071898d73dc935c3b66b9816183806f0humper@google.com 6998ae714b186ae5f4eaddee239281fbfe7282320c9skia.committer@gmail.com// TODO MAYBE: Maintain a profile cache to avoid recomputing this for 7007c7292c6071898d73dc935c3b66b9816183806f0humper@google.com// commonly used radii. Consider baking some of the most common blur radii 7017c7292c6071898d73dc935c3b66b9816183806f0humper@google.com// directly in as static data? 7027c7292c6071898d73dc935c3b66b9816183806f0humper@google.com 7037c7292c6071898d73dc935c3b66b9816183806f0humper@google.com// Implementation adapted from Michael Herf's approach: 7047c7292c6071898d73dc935c3b66b9816183806f0humper@google.com// http://stereopsis.com/shadowrect/ 7057c7292c6071898d73dc935c3b66b9816183806f0humper@google.com 706cf34bc06347dd2734a7fdaef5cf8853e92979d5ecommit-bot@chromium.orguint8_t SkBlurMask::ProfileLookup(const uint8_t *profile, int loc, int blurred_width, int sharp_width) { 707a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com int dx = SkAbs32(((loc << 1) + 1) - blurred_width) - sharp_width; // how far are we from the original edge? 708a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com int ox = dx >> 1; 709a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com if (ox < 0) { 710a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com ox = 0; 711a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com } 712d454ec135eeef48edea7ebc47a61ff39bd654576skia.committer@gmail.com 713a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com return profile[ox]; 714a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com} 715a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com 7164c18e9fbb685cccf23342757e786027a032197daskia.committer@gmail.comvoid SkBlurMask::ComputeBlurredScanline(uint8_t *pixels, const uint8_t *profile, 717cf34bc06347dd2734a7fdaef5cf8853e92979d5ecommit-bot@chromium.org unsigned int width, SkScalar sigma) { 718cf34bc06347dd2734a7fdaef5cf8853e92979d5ecommit-bot@chromium.org 719cf34bc06347dd2734a7fdaef5cf8853e92979d5ecommit-bot@chromium.org unsigned int profile_size = SkScalarCeilToInt(6*sigma); 720cf34bc06347dd2734a7fdaef5cf8853e92979d5ecommit-bot@chromium.org SkAutoTMalloc<uint8_t> horizontalScanline(width); 721cf34bc06347dd2734a7fdaef5cf8853e92979d5ecommit-bot@chromium.org 722cf34bc06347dd2734a7fdaef5cf8853e92979d5ecommit-bot@chromium.org unsigned int sw = width - profile_size; 723cf34bc06347dd2734a7fdaef5cf8853e92979d5ecommit-bot@chromium.org // nearest odd number less than the profile size represents the center 724cf34bc06347dd2734a7fdaef5cf8853e92979d5ecommit-bot@chromium.org // of the (2x scaled) profile 725cf34bc06347dd2734a7fdaef5cf8853e92979d5ecommit-bot@chromium.org int center = ( profile_size & ~1 ) - 1; 726cf34bc06347dd2734a7fdaef5cf8853e92979d5ecommit-bot@chromium.org 727cf34bc06347dd2734a7fdaef5cf8853e92979d5ecommit-bot@chromium.org int w = sw - center; 728cf34bc06347dd2734a7fdaef5cf8853e92979d5ecommit-bot@chromium.org 729cf34bc06347dd2734a7fdaef5cf8853e92979d5ecommit-bot@chromium.org for (unsigned int x = 0 ; x < width ; ++x) { 730cf34bc06347dd2734a7fdaef5cf8853e92979d5ecommit-bot@chromium.org if (profile_size <= sw) { 731cf34bc06347dd2734a7fdaef5cf8853e92979d5ecommit-bot@chromium.org pixels[x] = ProfileLookup(profile, x, width, w); 732cf34bc06347dd2734a7fdaef5cf8853e92979d5ecommit-bot@chromium.org } else { 733cf34bc06347dd2734a7fdaef5cf8853e92979d5ecommit-bot@chromium.org float span = float(sw)/(2*sigma); 734cf34bc06347dd2734a7fdaef5cf8853e92979d5ecommit-bot@chromium.org float giX = 1.5f - (x+.5f)/(2*sigma); 735cf34bc06347dd2734a7fdaef5cf8853e92979d5ecommit-bot@chromium.org pixels[x] = (uint8_t) (255 * (gaussianIntegral(giX) - gaussianIntegral(giX + span))); 736cf34bc06347dd2734a7fdaef5cf8853e92979d5ecommit-bot@chromium.org } 7374c18e9fbb685cccf23342757e786027a032197daskia.committer@gmail.com } 738cf34bc06347dd2734a7fdaef5cf8853e92979d5ecommit-bot@chromium.org} 739cf34bc06347dd2734a7fdaef5cf8853e92979d5ecommit-bot@chromium.org 7407bd141dce43ea3405bc60c9c84e6f910b851b079skia.committer@gmail.combool SkBlurMask::BlurRect(SkScalar sigma, SkMask *dst, 741e396455d2d60ddf8e625b5037254f3c09fbcdcf5commit-bot@chromium.org const SkRect &src, SkBlurStyle style, 7427ce661d19c5cf4484305a1b20c44bd111f129847robertphillips@google.com SkIPoint *margin, SkMask::CreateMode createMode) { 7437ce661d19c5cf4484305a1b20c44bd111f129847robertphillips@google.com int profile_size = SkScalarCeilToInt(6*sigma); 7442e71f1619d9a2c51c1292e618f42a56ad2da1de8skia.committer@gmail.com 745a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com int pad = profile_size/2; 7467c7292c6071898d73dc935c3b66b9816183806f0humper@google.com if (margin) { 7477c7292c6071898d73dc935c3b66b9816183806f0humper@google.com margin->set( pad, pad ); 7487c7292c6071898d73dc935c3b66b9816183806f0humper@google.com } 749d454ec135eeef48edea7ebc47a61ff39bd654576skia.committer@gmail.com 7502e71f1619d9a2c51c1292e618f42a56ad2da1de8skia.committer@gmail.com dst->fBounds.set(SkScalarRoundToInt(src.fLeft - pad), 7512e71f1619d9a2c51c1292e618f42a56ad2da1de8skia.committer@gmail.com SkScalarRoundToInt(src.fTop - pad), 7522e71f1619d9a2c51c1292e618f42a56ad2da1de8skia.committer@gmail.com SkScalarRoundToInt(src.fRight + pad), 75368a690cb05d78060a95b1c8af0e60467740730a4humper@google.com SkScalarRoundToInt(src.fBottom + pad)); 7548ae714b186ae5f4eaddee239281fbfe7282320c9skia.committer@gmail.com 7557c7292c6071898d73dc935c3b66b9816183806f0humper@google.com dst->fRowBytes = dst->fBounds.width(); 7567c7292c6071898d73dc935c3b66b9816183806f0humper@google.com dst->fFormat = SkMask::kA8_Format; 7577c7292c6071898d73dc935c3b66b9816183806f0humper@google.com dst->fImage = NULL; 7582e71f1619d9a2c51c1292e618f42a56ad2da1de8skia.committer@gmail.com 7597c5d7b781385c47e5be9a343d60c5b7d33b5b8cdhumper@google.com int sw = SkScalarFloorToInt(src.width()); 7607c5d7b781385c47e5be9a343d60c5b7d33b5b8cdhumper@google.com int sh = SkScalarFloorToInt(src.height()); 7612e71f1619d9a2c51c1292e618f42a56ad2da1de8skia.committer@gmail.com 7627c5d7b781385c47e5be9a343d60c5b7d33b5b8cdhumper@google.com if (createMode == SkMask::kJustComputeBounds_CreateMode) { 763e396455d2d60ddf8e625b5037254f3c09fbcdcf5commit-bot@chromium.org if (style == kInner_SkBlurStyle) { 7642e71f1619d9a2c51c1292e618f42a56ad2da1de8skia.committer@gmail.com dst->fBounds.set(SkScalarRoundToInt(src.fLeft), 7652e71f1619d9a2c51c1292e618f42a56ad2da1de8skia.committer@gmail.com SkScalarRoundToInt(src.fTop), 7662e71f1619d9a2c51c1292e618f42a56ad2da1de8skia.committer@gmail.com SkScalarRoundToInt(src.fRight), 76768a690cb05d78060a95b1c8af0e60467740730a4humper@google.com SkScalarRoundToInt(src.fBottom)); // restore trimmed bounds 7687c5d7b781385c47e5be9a343d60c5b7d33b5b8cdhumper@google.com dst->fRowBytes = sw; 7697c5d7b781385c47e5be9a343d60c5b7d33b5b8cdhumper@google.com } 7707c5d7b781385c47e5be9a343d60c5b7d33b5b8cdhumper@google.com return true; 7717c5d7b781385c47e5be9a343d60c5b7d33b5b8cdhumper@google.com } 772cf34bc06347dd2734a7fdaef5cf8853e92979d5ecommit-bot@chromium.org uint8_t *profile = NULL; 7732e71f1619d9a2c51c1292e618f42a56ad2da1de8skia.committer@gmail.com 774cf34bc06347dd2734a7fdaef5cf8853e92979d5ecommit-bot@chromium.org ComputeBlurProfile(sigma, &profile); 775cf34bc06347dd2734a7fdaef5cf8853e92979d5ecommit-bot@chromium.org SkAutoTDeleteArray<uint8_t> ada(profile); 7762e71f1619d9a2c51c1292e618f42a56ad2da1de8skia.committer@gmail.com 7777c7292c6071898d73dc935c3b66b9816183806f0humper@google.com size_t dstSize = dst->computeImageSize(); 7787c7292c6071898d73dc935c3b66b9816183806f0humper@google.com if (0 == dstSize) { 7797c7292c6071898d73dc935c3b66b9816183806f0humper@google.com return false; // too big to allocate, abort 7807c7292c6071898d73dc935c3b66b9816183806f0humper@google.com } 7818ae714b186ae5f4eaddee239281fbfe7282320c9skia.committer@gmail.com 7827c7292c6071898d73dc935c3b66b9816183806f0humper@google.com uint8_t* dp = SkMask::AllocImage(dstSize); 7838ae714b186ae5f4eaddee239281fbfe7282320c9skia.committer@gmail.com 7847c7292c6071898d73dc935c3b66b9816183806f0humper@google.com dst->fImage = dp; 7858ae714b186ae5f4eaddee239281fbfe7282320c9skia.committer@gmail.com 786a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com int dstHeight = dst->fBounds.height(); 787a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com int dstWidth = dst->fBounds.width(); 7888ae714b186ae5f4eaddee239281fbfe7282320c9skia.committer@gmail.com 7897c7292c6071898d73dc935c3b66b9816183806f0humper@google.com uint8_t *outptr = dp; 790d454ec135eeef48edea7ebc47a61ff39bd654576skia.committer@gmail.com 791a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com SkAutoTMalloc<uint8_t> horizontalScanline(dstWidth); 792cf34bc06347dd2734a7fdaef5cf8853e92979d5ecommit-bot@chromium.org SkAutoTMalloc<uint8_t> verticalScanline(dstHeight); 7934c18e9fbb685cccf23342757e786027a032197daskia.committer@gmail.com 794cf34bc06347dd2734a7fdaef5cf8853e92979d5ecommit-bot@chromium.org ComputeBlurredScanline(horizontalScanline, profile, dstWidth, sigma); 795cf34bc06347dd2734a7fdaef5cf8853e92979d5ecommit-bot@chromium.org ComputeBlurredScanline(verticalScanline, profile, dstHeight, sigma); 796d454ec135eeef48edea7ebc47a61ff39bd654576skia.committer@gmail.com 797a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com for (int y = 0 ; y < dstHeight ; ++y) { 798a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com for (int x = 0 ; x < dstWidth ; x++) { 799cf34bc06347dd2734a7fdaef5cf8853e92979d5ecommit-bot@chromium.org unsigned int maskval = SkMulDiv255Round(horizontalScanline[x], verticalScanline[y]); 800a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com *(outptr++) = maskval; 801a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com } 802a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com } 803d454ec135eeef48edea7ebc47a61ff39bd654576skia.committer@gmail.com 804e396455d2d60ddf8e625b5037254f3c09fbcdcf5commit-bot@chromium.org if (style == kInner_SkBlurStyle) { 805a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com // now we allocate the "real" dst, mirror the size of src 806d98df1a3c468a2a7a5fff5efbf6dbdaf077d1abejvanverth@google.com size_t srcSize = (size_t)(src.width() * src.height()); 807a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com if (0 == srcSize) { 808a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com return false; // too big to allocate, abort 809a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com } 810a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com dst->fImage = SkMask::AllocImage(srcSize); 811a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com for (int y = 0 ; y < sh ; y++) { 812a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com uint8_t *blur_scanline = dp + (y+pad)*dstWidth + pad; 813a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com uint8_t *inner_scanline = dst->fImage + y*sw; 814a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com memcpy(inner_scanline, blur_scanline, sw); 815a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com } 816a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com SkMask::FreeImage(dp); 817a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com 8182e71f1619d9a2c51c1292e618f42a56ad2da1de8skia.committer@gmail.com dst->fBounds.set(SkScalarRoundToInt(src.fLeft), 8192e71f1619d9a2c51c1292e618f42a56ad2da1de8skia.committer@gmail.com SkScalarRoundToInt(src.fTop), 8202e71f1619d9a2c51c1292e618f42a56ad2da1de8skia.committer@gmail.com SkScalarRoundToInt(src.fRight), 82168a690cb05d78060a95b1c8af0e60467740730a4humper@google.com SkScalarRoundToInt(src.fBottom)); // restore trimmed bounds 822a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com dst->fRowBytes = sw; 823d454ec135eeef48edea7ebc47a61ff39bd654576skia.committer@gmail.com 824e396455d2d60ddf8e625b5037254f3c09fbcdcf5commit-bot@chromium.org } else if (style == kOuter_SkBlurStyle) { 825a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com for (int y = pad ; y < dstHeight-pad ; y++) { 826a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com uint8_t *dst_scanline = dp + y*dstWidth + pad; 827a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com memset(dst_scanline, 0, sw); 828a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com } 829e396455d2d60ddf8e625b5037254f3c09fbcdcf5commit-bot@chromium.org } else if (style == kSolid_SkBlurStyle) { 830d4d573057ee126bae354934b8d31f5695af387b6humper@google.com for (int y = pad ; y < dstHeight-pad ; y++) { 831d4d573057ee126bae354934b8d31f5695af387b6humper@google.com uint8_t *dst_scanline = dp + y*dstWidth + pad; 832d4d573057ee126bae354934b8d31f5695af387b6humper@google.com memset(dst_scanline, 0xff, sw); 8332e71f1619d9a2c51c1292e618f42a56ad2da1de8skia.committer@gmail.com } 834a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com } 835a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com // normal and solid styles are the same for analytic rect blurs, so don't 836a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com // need to handle solid specially. 8378ae714b186ae5f4eaddee239281fbfe7282320c9skia.committer@gmail.com 838a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com return true; 839a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com} 8408ae714b186ae5f4eaddee239281fbfe7282320c9skia.committer@gmail.com 841a477154cfce6276277f4eacc20908a6c986c112ccommit-bot@chromium.orgbool SkBlurMask::BlurRRect(SkScalar sigma, SkMask *dst, 842e396455d2d60ddf8e625b5037254f3c09fbcdcf5commit-bot@chromium.org const SkRRect &src, SkBlurStyle style, 843a477154cfce6276277f4eacc20908a6c986c112ccommit-bot@chromium.org SkIPoint *margin, SkMask::CreateMode createMode) { 844a477154cfce6276277f4eacc20908a6c986c112ccommit-bot@chromium.org // Temporary for now -- always fail, should cause caller to fall back 845a477154cfce6276277f4eacc20908a6c986c112ccommit-bot@chromium.org // to old path. Plumbing just to land API and parallelize effort. 846a477154cfce6276277f4eacc20908a6c986c112ccommit-bot@chromium.org 847a477154cfce6276277f4eacc20908a6c986c112ccommit-bot@chromium.org return false; 8487ce661d19c5cf4484305a1b20c44bd111f129847robertphillips@google.com} 849a477154cfce6276277f4eacc20908a6c986c112ccommit-bot@chromium.org 850a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com// The "simple" blur is a direct implementation of separable convolution with a discrete 851a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com// gaussian kernel. It's "ground truth" in a sense; too slow to be used, but very 852a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com// useful for correctness comparisons. 8538ae714b186ae5f4eaddee239281fbfe7282320c9skia.committer@gmail.com 8547ce661d19c5cf4484305a1b20c44bd111f129847robertphillips@google.combool SkBlurMask::BlurGroundTruth(SkScalar sigma, SkMask* dst, const SkMask& src, 855e396455d2d60ddf8e625b5037254f3c09fbcdcf5commit-bot@chromium.org SkBlurStyle style, SkIPoint* margin) { 856d454ec135eeef48edea7ebc47a61ff39bd654576skia.committer@gmail.com 857a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com if (src.fFormat != SkMask::kA8_Format) { 858a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com return false; 859a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com } 8608ae714b186ae5f4eaddee239281fbfe7282320c9skia.committer@gmail.com 8617ce661d19c5cf4484305a1b20c44bd111f129847robertphillips@google.com float variance = sigma * sigma; 862a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com 863e1ca705cac4b946993f6cbf798e2a0ba27e739f3reed@google.com int windowSize = SkScalarCeilToInt(sigma*6); 864a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com // round window size up to nearest odd number 865a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com windowSize |= 1; 866a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com 867a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com SkAutoTMalloc<float> gaussWindow(windowSize); 868a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com 869a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com int halfWindow = windowSize >> 1; 870d454ec135eeef48edea7ebc47a61ff39bd654576skia.committer@gmail.com 871a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com gaussWindow[halfWindow] = 1; 872d454ec135eeef48edea7ebc47a61ff39bd654576skia.committer@gmail.com 873a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com float windowSum = 1; 874a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com for (int x = 1 ; x <= halfWindow ; ++x) { 8753dfa4cc07cb1b5c8dc90e022b7e5001a77a82066robertphillips@google.com float gaussian = expf(-x*x / (2*variance)); 876a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com gaussWindow[halfWindow + x] = gaussWindow[halfWindow-x] = gaussian; 877a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com windowSum += 2*gaussian; 878a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com } 879a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com 880a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com // leave the filter un-normalized for now; we will divide by the normalization 881a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com // sum later; 882d454ec135eeef48edea7ebc47a61ff39bd654576skia.committer@gmail.com 883a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com int pad = halfWindow; 884a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com if (margin) { 885a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com margin->set( pad, pad ); 886a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com } 887a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com 888a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com dst->fBounds = src.fBounds; 889a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com dst->fBounds.outset(pad, pad); 890a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com 891a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com dst->fRowBytes = dst->fBounds.width(); 892a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com dst->fFormat = SkMask::kA8_Format; 893a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com dst->fImage = NULL; 894a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com 895a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com if (src.fImage) { 896a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com 897a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com size_t dstSize = dst->computeImageSize(); 898a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com if (0 == dstSize) { 899a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com return false; // too big to allocate, abort 900a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com } 901d454ec135eeef48edea7ebc47a61ff39bd654576skia.committer@gmail.com 902a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com int srcWidth = src.fBounds.width(); 903a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com int srcHeight = src.fBounds.height(); 904a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com int dstWidth = dst->fBounds.width(); 905d454ec135eeef48edea7ebc47a61ff39bd654576skia.committer@gmail.com 906a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com const uint8_t* srcPixels = src.fImage; 907a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com uint8_t* dstPixels = SkMask::AllocImage(dstSize); 908a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com SkAutoTCallVProc<uint8_t, SkMask_FreeImage> autoCall(dstPixels); 909a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com 910a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com // do the actual blur. First, make a padded copy of the source. 911a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com // use double pad so we never have to check if we're outside anything 912d454ec135eeef48edea7ebc47a61ff39bd654576skia.committer@gmail.com 913a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com int padWidth = srcWidth + 4*pad; 914a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com int padHeight = srcHeight; 915a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com int padSize = padWidth * padHeight; 916d454ec135eeef48edea7ebc47a61ff39bd654576skia.committer@gmail.com 917a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com SkAutoTMalloc<uint8_t> padPixels(padSize); 918a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com memset(padPixels, 0, padSize); 919d454ec135eeef48edea7ebc47a61ff39bd654576skia.committer@gmail.com 920a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com for (int y = 0 ; y < srcHeight; ++y) { 921a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com uint8_t* padptr = padPixels + y * padWidth + 2*pad; 922a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com const uint8_t* srcptr = srcPixels + y * srcWidth; 923a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com memcpy(padptr, srcptr, srcWidth); 924a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com } 925d454ec135eeef48edea7ebc47a61ff39bd654576skia.committer@gmail.com 926a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com // blur in X, transposing the result into a temporary floating point buffer. 927a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com // also double-pad the intermediate result so that the second blur doesn't 928a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com // have to do extra conditionals. 929d454ec135eeef48edea7ebc47a61ff39bd654576skia.committer@gmail.com 930a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com int tmpWidth = padHeight + 4*pad; 931a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com int tmpHeight = padWidth - 2*pad; 932a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com int tmpSize = tmpWidth * tmpHeight; 933d454ec135eeef48edea7ebc47a61ff39bd654576skia.committer@gmail.com 934a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com SkAutoTMalloc<float> tmpImage(tmpSize); 935a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com memset(tmpImage, 0, tmpSize*sizeof(tmpImage[0])); 936a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com 937a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com for (int y = 0 ; y < padHeight ; ++y) { 938a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com uint8_t *srcScanline = padPixels + y*padWidth; 939a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com for (int x = pad ; x < padWidth - pad ; ++x) { 940a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com float *outPixel = tmpImage + (x-pad)*tmpWidth + y + 2*pad; // transposed output 941a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com uint8_t *windowCenter = srcScanline + x; 942a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com for (int i = -pad ; i <= pad ; ++i) { 943a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com *outPixel += gaussWindow[pad+i]*windowCenter[i]; 944a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com } 945a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com *outPixel /= windowSum; 946d454ec135eeef48edea7ebc47a61ff39bd654576skia.committer@gmail.com } 947a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com } 948d454ec135eeef48edea7ebc47a61ff39bd654576skia.committer@gmail.com 949a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com // blur in Y; now filling in the actual desired destination. We have to do 950d454ec135eeef48edea7ebc47a61ff39bd654576skia.committer@gmail.com // the transpose again; these transposes guarantee that we read memory in 951a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com // linear order. 952d454ec135eeef48edea7ebc47a61ff39bd654576skia.committer@gmail.com 953a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com for (int y = 0 ; y < tmpHeight ; ++y) { 954a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com float *srcScanline = tmpImage + y*tmpWidth; 955a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com for (int x = pad ; x < tmpWidth - pad ; ++x) { 956a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com float *windowCenter = srcScanline + x; 957a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com float finalValue = 0; 958a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com for (int i = -pad ; i <= pad ; ++i) { 959a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com finalValue += gaussWindow[pad+i]*windowCenter[i]; 960a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com } 961a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com finalValue /= windowSum; 962a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com uint8_t *outPixel = dstPixels + (x-pad)*dstWidth + y; // transposed output 963a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com int integerPixel = int(finalValue + 0.5f); 964a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com *outPixel = SkClampMax( SkClampPos(integerPixel), 255 ); 965a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com } 966a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com } 967d454ec135eeef48edea7ebc47a61ff39bd654576skia.committer@gmail.com 968a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com dst->fImage = dstPixels; 969a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com // if need be, alloc the "real" dst (same size as src) and copy/merge 970a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com // the blur into it (applying the src) 971e396455d2d60ddf8e625b5037254f3c09fbcdcf5commit-bot@chromium.org if (style == kInner_SkBlurStyle) { 972a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com // now we allocate the "real" dst, mirror the size of src 973a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com size_t srcSize = src.computeImageSize(); 974a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com if (0 == srcSize) { 975a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com return false; // too big to allocate, abort 976a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com } 977a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com dst->fImage = SkMask::AllocImage(srcSize); 978a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com merge_src_with_blur(dst->fImage, src.fRowBytes, 979a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com srcPixels, src.fRowBytes, 980a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com dstPixels + pad*dst->fRowBytes + pad, 981a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com dst->fRowBytes, srcWidth, srcHeight); 982a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com SkMask::FreeImage(dstPixels); 983e396455d2d60ddf8e625b5037254f3c09fbcdcf5commit-bot@chromium.org } else if (style != kNormal_SkBlurStyle) { 984a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com clamp_with_orig(dstPixels + pad*dst->fRowBytes + pad, 985a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com dst->fRowBytes, srcPixels, src.fRowBytes, srcWidth, srcHeight, style); 9867c7292c6071898d73dc935c3b66b9816183806f0humper@google.com } 987a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com (void)autoCall.detach(); 988a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com } 989a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com 990e396455d2d60ddf8e625b5037254f3c09fbcdcf5commit-bot@chromium.org if (style == kInner_SkBlurStyle) { 991a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com dst->fBounds = src.fBounds; // restore trimmed bounds 992a99a92cebaa46cf792cf86eaad1a4c3f9d6162f7humper@google.com dst->fRowBytes = src.fRowBytes; 9937c7292c6071898d73dc935c3b66b9816183806f0humper@google.com } 9948ae714b186ae5f4eaddee239281fbfe7282320c9skia.committer@gmail.com 9957c7292c6071898d73dc935c3b66b9816183806f0humper@google.com return true; 9967c7292c6071898d73dc935c3b66b9816183806f0humper@google.com} 997