senorblanco@chromium.org | fd0ec2c | 2014-03-25 17:35:10 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2014 The Android Open Source Project |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
| 6 | */ |
| 7 | |
| 8 | #include "SkMatrixImageFilter.h" |
| 9 | #include "SkBitmap.h" |
| 10 | #include "SkCanvas.h" |
| 11 | #include "SkDevice.h" |
| 12 | #include "SkColorPriv.h" |
| 13 | #include "SkReadBuffer.h" |
| 14 | #include "SkWriteBuffer.h" |
| 15 | #include "SkMatrix.h" |
| 16 | #include "SkRect.h" |
| 17 | |
| 18 | SkMatrixImageFilter::SkMatrixImageFilter(const SkMatrix& transform, |
| 19 | SkPaint::FilterLevel filterLevel, |
senorblanco | 5e5f948 | 2014-08-26 12:27:12 -0700 | [diff] [blame^] | 20 | SkImageFilter* input, |
| 21 | uint32_t uniqueID) |
| 22 | : INHERITED(1, &input, NULL, uniqueID), |
senorblanco@chromium.org | fd0ec2c | 2014-03-25 17:35:10 +0000 | [diff] [blame] | 23 | fTransform(transform), |
| 24 | fFilterLevel(filterLevel) { |
| 25 | } |
| 26 | |
| 27 | SkMatrixImageFilter* SkMatrixImageFilter::Create(const SkMatrix& transform, |
| 28 | SkPaint::FilterLevel filterLevel, |
senorblanco | 5e5f948 | 2014-08-26 12:27:12 -0700 | [diff] [blame^] | 29 | SkImageFilter* input, |
| 30 | uint32_t uniqueID) { |
| 31 | return SkNEW_ARGS(SkMatrixImageFilter, (transform, filterLevel, input, uniqueID)); |
senorblanco@chromium.org | fd0ec2c | 2014-03-25 17:35:10 +0000 | [diff] [blame] | 32 | } |
| 33 | |
reed | 9fa60da | 2014-08-21 07:59:51 -0700 | [diff] [blame] | 34 | #ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING |
senorblanco@chromium.org | fd0ec2c | 2014-03-25 17:35:10 +0000 | [diff] [blame] | 35 | SkMatrixImageFilter::SkMatrixImageFilter(SkReadBuffer& buffer) |
| 36 | : INHERITED(1, buffer) { |
| 37 | buffer.readMatrix(&fTransform); |
| 38 | fFilterLevel = static_cast<SkPaint::FilterLevel>(buffer.readInt()); |
| 39 | } |
reed | 9fa60da | 2014-08-21 07:59:51 -0700 | [diff] [blame] | 40 | #endif |
| 41 | |
| 42 | SkFlattenable* SkMatrixImageFilter::CreateProc(SkReadBuffer& buffer) { |
| 43 | SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 1); |
| 44 | SkMatrix matrix; |
| 45 | buffer.readMatrix(&matrix); |
| 46 | SkPaint::FilterLevel level = static_cast<SkPaint::FilterLevel>(buffer.readInt()); |
senorblanco | 5e5f948 | 2014-08-26 12:27:12 -0700 | [diff] [blame^] | 47 | return Create(matrix, level, common.getInput(0), common.uniqueID()); |
reed | 9fa60da | 2014-08-21 07:59:51 -0700 | [diff] [blame] | 48 | } |
senorblanco@chromium.org | fd0ec2c | 2014-03-25 17:35:10 +0000 | [diff] [blame] | 49 | |
| 50 | void SkMatrixImageFilter::flatten(SkWriteBuffer& buffer) const { |
| 51 | this->INHERITED::flatten(buffer); |
| 52 | buffer.writeMatrix(fTransform); |
| 53 | buffer.writeInt(fFilterLevel); |
| 54 | } |
| 55 | |
| 56 | SkMatrixImageFilter::~SkMatrixImageFilter() { |
| 57 | } |
| 58 | |
| 59 | bool SkMatrixImageFilter::onFilterImage(Proxy* proxy, |
| 60 | const SkBitmap& source, |
| 61 | const Context& ctx, |
| 62 | SkBitmap* result, |
| 63 | SkIPoint* offset) const { |
| 64 | SkBitmap src = source; |
| 65 | SkIPoint srcOffset = SkIPoint::Make(0, 0); |
| 66 | if (getInput(0) && !getInput(0)->filterImage(proxy, source, ctx, &src, &srcOffset)) { |
| 67 | return false; |
| 68 | } |
| 69 | |
| 70 | SkRect dstRect; |
| 71 | SkIRect srcBounds, dstBounds; |
| 72 | src.getBounds(&srcBounds); |
| 73 | srcBounds.offset(srcOffset); |
| 74 | SkRect srcRect = SkRect::Make(srcBounds); |
| 75 | SkMatrix matrix; |
| 76 | if (!ctx.ctm().invert(&matrix)) { |
| 77 | return false; |
| 78 | } |
| 79 | matrix.postConcat(fTransform); |
| 80 | matrix.postConcat(ctx.ctm()); |
| 81 | matrix.mapRect(&dstRect, srcRect); |
| 82 | dstRect.roundOut(&dstBounds); |
| 83 | |
| 84 | SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(dstBounds.width(), dstBounds.height())); |
| 85 | if (NULL == device.get()) { |
| 86 | return false; |
| 87 | } |
| 88 | |
| 89 | SkCanvas canvas(device.get()); |
| 90 | canvas.translate(-SkIntToScalar(dstBounds.x()), -SkIntToScalar(dstBounds.y())); |
| 91 | canvas.concat(matrix); |
| 92 | SkPaint paint; |
| 93 | |
| 94 | paint.setXfermodeMode(SkXfermode::kSrc_Mode); |
| 95 | paint.setFilterLevel(fFilterLevel); |
| 96 | canvas.drawBitmap(src, srcRect.x(), srcRect.y(), &paint); |
| 97 | |
| 98 | *result = device.get()->accessBitmap(false); |
| 99 | offset->fX = dstBounds.fLeft; |
| 100 | offset->fY = dstBounds.fTop; |
| 101 | return true; |
| 102 | } |
| 103 | |
| 104 | void SkMatrixImageFilter::computeFastBounds(const SkRect& src, SkRect* dst) const { |
| 105 | SkRect bounds = src; |
| 106 | if (getInput(0)) { |
| 107 | getInput(0)->computeFastBounds(src, &bounds); |
| 108 | } |
| 109 | SkMatrix matrix; |
| 110 | matrix.setTranslate(-bounds.x(), -bounds.y()); |
| 111 | matrix.postConcat(fTransform); |
| 112 | matrix.postTranslate(bounds.x(), bounds.y()); |
| 113 | matrix.mapRect(dst, bounds); |
| 114 | } |
| 115 | |
| 116 | bool SkMatrixImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix& ctm, |
| 117 | SkIRect* dst) const { |
| 118 | SkMatrix transformInverse; |
| 119 | if (!fTransform.invert(&transformInverse)) { |
| 120 | return false; |
| 121 | } |
| 122 | SkMatrix matrix; |
| 123 | if (!ctm.invert(&matrix)) { |
| 124 | return false; |
| 125 | } |
| 126 | matrix.postConcat(transformInverse); |
| 127 | matrix.postConcat(ctm); |
| 128 | SkRect floatBounds; |
| 129 | matrix.mapRect(&floatBounds, SkRect::Make(src)); |
| 130 | SkIRect bounds; |
| 131 | floatBounds.roundOut(&bounds); |
| 132 | if (getInput(0) && !getInput(0)->filterBounds(bounds, ctm, &bounds)) { |
| 133 | return false; |
| 134 | } |
| 135 | |
| 136 | *dst = bounds; |
| 137 | return true; |
| 138 | } |