epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 1 | |
| 2 | /* |
| 3 | * Copyright 2011 Google Inc. |
| 4 | * |
| 5 | * Use of this source code is governed by a BSD-style license that can be |
| 6 | * found in the LICENSE file. |
| 7 | */ |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 8 | #include "SkKernel33MaskFilter.h" |
| 9 | #include "SkColorPriv.h" |
commit-bot@chromium.org | 8b0e8ac | 2014-01-30 18:58:24 +0000 | [diff] [blame] | 10 | #include "SkReadBuffer.h" |
| 11 | #include "SkWriteBuffer.h" |
robertphillips@google.com | 0bd80fa | 2013-03-18 17:53:38 +0000 | [diff] [blame] | 12 | #include "SkString.h" |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 13 | |
reed@google.com | 30711b7 | 2012-12-18 19:18:39 +0000 | [diff] [blame] | 14 | SkMask::Format SkKernel33ProcMaskFilter::getFormat() const { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 15 | return SkMask::kA8_Format; |
| 16 | } |
| 17 | |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 18 | bool SkKernel33ProcMaskFilter::filterMask(SkMask* dst, const SkMask& src, |
reed@google.com | 30711b7 | 2012-12-18 19:18:39 +0000 | [diff] [blame] | 19 | const SkMatrix&, SkIPoint* margin) const { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 20 | // margin??? |
| 21 | dst->fImage = NULL; |
| 22 | dst->fBounds = src.fBounds; |
| 23 | dst->fBounds.inset(-1, -1); |
| 24 | dst->fFormat = SkMask::kA8_Format; |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 25 | |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 26 | if (NULL == src.fImage) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 27 | return true; |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 28 | } |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 29 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 30 | dst->fRowBytes = dst->fBounds.width(); |
| 31 | size_t size = dst->computeImageSize(); |
reed@android.com | 543ed93 | 2009-04-24 12:43:40 +0000 | [diff] [blame] | 32 | if (0 == size) { |
| 33 | return false; // too big to allocate, abort |
| 34 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 35 | dst->fImage = SkMask::AllocImage(size); |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 36 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 37 | const int h = src.fBounds.height(); |
| 38 | const int w = src.fBounds.width(); |
| 39 | const int srcRB = src.fRowBytes; |
| 40 | const uint8_t* srcImage = src.fImage; |
| 41 | uint8_t* dstImage = dst->fImage; |
| 42 | |
| 43 | uint8_t* srcRows[3]; |
| 44 | uint8_t storage[3][3]; |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 45 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 46 | srcRows[0] = storage[0]; |
| 47 | srcRows[1] = storage[1]; |
| 48 | srcRows[2] = storage[2]; |
| 49 | |
| 50 | unsigned scale = fPercent256; |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 51 | |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 52 | for (int y = -1; y <= h; y++) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 53 | uint8_t* dstRow = dstImage; |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 54 | for (int x = -1; x <= w; x++) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 55 | memset(storage, 0, sizeof(storage)); |
| 56 | uint8_t* storagePtr = &storage[0][0]; |
| 57 | |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 58 | for (int ky = y - 1; ky <= y + 1; ky++) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 59 | const uint8_t* srcRow = srcImage + ky * srcRB; // may be out-of-range |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 60 | for (int kx = x - 1; kx <= x + 1; kx++) { |
| 61 | if ((unsigned)ky < (unsigned)h && (unsigned)kx < (unsigned)w) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 62 | *storagePtr = srcRow[kx]; |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 63 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 64 | storagePtr++; |
| 65 | } |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 66 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 67 | int value = this->computeValue(srcRows); |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 68 | |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 69 | if (scale < 256) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 70 | value = SkAlphaBlend(value, srcRows[1][1], scale); |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 71 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 72 | *dstRow++ = SkToU8(value); |
| 73 | } |
| 74 | dstImage += dst->fRowBytes; |
| 75 | } |
| 76 | return true; |
| 77 | } |
| 78 | |
commit-bot@chromium.org | 8b0e8ac | 2014-01-30 18:58:24 +0000 | [diff] [blame] | 79 | void SkKernel33ProcMaskFilter::flatten(SkWriteBuffer& wb) const { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 80 | this->INHERITED::flatten(wb); |
djsollen@google.com | c73dd5c | 2012-08-07 15:54:32 +0000 | [diff] [blame] | 81 | wb.writeInt(fPercent256); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 82 | } |
| 83 | |
commit-bot@chromium.org | 8b0e8ac | 2014-01-30 18:58:24 +0000 | [diff] [blame] | 84 | SkKernel33ProcMaskFilter::SkKernel33ProcMaskFilter(SkReadBuffer& rb) |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 85 | : SkMaskFilter(rb) { |
djsollen@google.com | c73dd5c | 2012-08-07 15:54:32 +0000 | [diff] [blame] | 86 | fPercent256 = rb.readInt(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 87 | } |
| 88 | |
commit-bot@chromium.org | 0f10f7b | 2014-03-13 18:02:17 +0000 | [diff] [blame] | 89 | #ifndef SK_IGNORE_TO_STRING |
robertphillips@google.com | 0bd80fa | 2013-03-18 17:53:38 +0000 | [diff] [blame] | 90 | void SkKernel33ProcMaskFilter::toString(SkString* str) const { |
| 91 | str->appendf("percent256: %d, ", fPercent256); |
| 92 | } |
| 93 | #endif |
| 94 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 95 | /////////////////////////////////////////////////////////////////////////////// |
| 96 | |
reed@google.com | 30711b7 | 2012-12-18 19:18:39 +0000 | [diff] [blame] | 97 | uint8_t SkKernel33MaskFilter::computeValue(uint8_t* const* srcRows) const { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 98 | int value = 0; |
| 99 | |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 100 | for (int i = 0; i < 3; i++) { |
| 101 | for (int j = 0; j < 3; j++) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 102 | value += fKernel[i][j] * srcRows[i][j]; |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 103 | } |
| 104 | } |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 105 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 106 | value >>= fShift; |
| 107 | |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 108 | if (value < 0) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 109 | value = 0; |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 110 | } else if (value > 255) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 111 | value = 255; |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 112 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 113 | return (uint8_t)value; |
| 114 | } |
| 115 | |
commit-bot@chromium.org | 8b0e8ac | 2014-01-30 18:58:24 +0000 | [diff] [blame] | 116 | void SkKernel33MaskFilter::flatten(SkWriteBuffer& wb) const { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 117 | this->INHERITED::flatten(wb); |
djsollen@google.com | c73dd5c | 2012-08-07 15:54:32 +0000 | [diff] [blame] | 118 | wb.writeIntArray(&fKernel[0][0], 9); |
| 119 | wb.writeInt(fShift); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 120 | } |
| 121 | |
commit-bot@chromium.org | 8b0e8ac | 2014-01-30 18:58:24 +0000 | [diff] [blame] | 122 | SkKernel33MaskFilter::SkKernel33MaskFilter(SkReadBuffer& rb) |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 123 | : SkKernel33ProcMaskFilter(rb) { |
commit-bot@chromium.org | 0251288 | 2013-10-31 18:37:50 +0000 | [diff] [blame] | 124 | SkDEBUGCODE(bool success = )rb.readIntArray(&fKernel[0][0], 9); |
| 125 | SkASSERT(success); |
djsollen@google.com | c73dd5c | 2012-08-07 15:54:32 +0000 | [diff] [blame] | 126 | fShift = rb.readInt(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 127 | } |
robertphillips@google.com | 0bd80fa | 2013-03-18 17:53:38 +0000 | [diff] [blame] | 128 | |
commit-bot@chromium.org | 0f10f7b | 2014-03-13 18:02:17 +0000 | [diff] [blame] | 129 | #ifndef SK_IGNORE_TO_STRING |
robertphillips@google.com | 0bd80fa | 2013-03-18 17:53:38 +0000 | [diff] [blame] | 130 | void SkKernel33MaskFilter::toString(SkString* str) const { |
| 131 | str->append("SkKernel33MaskFilter: ("); |
| 132 | |
| 133 | str->appendf("kernel: (%d, %d, %d, %d, %d, %d, %d, %d, %d), ", |
| 134 | fKernel[0][0], fKernel[0][1], fKernel[0][2], |
| 135 | fKernel[1][0], fKernel[1][1], fKernel[1][2], |
| 136 | fKernel[2][0], fKernel[2][1], fKernel[2][2]); |
| 137 | str->appendf("shift: %d, ", fShift); |
| 138 | |
| 139 | this->INHERITED::toString(str); |
| 140 | |
| 141 | str->append(")"); |
| 142 | } |
| 143 | #endif |