epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 1 | |
| 2 | /* |
| 3 | * Copyright 2006 The Android Open Source Project |
| 4 | * |
| 5 | * Use of this source code is governed by a BSD-style license that can be |
| 6 | * found in the LICENSE file. |
| 7 | */ |
| 8 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 9 | |
| 10 | #include "SkLayerRasterizer.h" |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 11 | #include "SkDraw.h" |
djsollen@google.com | c73dd5c | 2012-08-07 15:54:32 +0000 | [diff] [blame] | 12 | #include "SkFlattenableBuffers.h" |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 13 | #include "SkMask.h" |
| 14 | #include "SkMaskFilter.h" |
| 15 | #include "SkPaint.h" |
| 16 | #include "SkPath.h" |
reed@google.com | 75a0972 | 2012-05-10 12:56:16 +0000 | [diff] [blame] | 17 | #include "SkPathEffect.h" |
reed@google.com | 045e62d | 2011-10-24 12:19:46 +0000 | [diff] [blame] | 18 | #include "../core/SkRasterClip.h" |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 19 | #include "SkXfermode.h" |
| 20 | #include <new> |
| 21 | |
| 22 | struct SkLayerRasterizer_Rec { |
| 23 | SkPaint fPaint; |
| 24 | SkVector fOffset; |
| 25 | }; |
| 26 | |
| 27 | SkLayerRasterizer::SkLayerRasterizer() : fLayers(sizeof(SkLayerRasterizer_Rec)) |
| 28 | { |
| 29 | } |
| 30 | |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 31 | SkLayerRasterizer::~SkLayerRasterizer() { |
reed@google.com | 4c09d5c | 2011-02-22 13:16:38 +0000 | [diff] [blame] | 32 | SkDeque::F2BIter iter(fLayers); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 33 | SkLayerRasterizer_Rec* rec; |
| 34 | |
| 35 | while ((rec = (SkLayerRasterizer_Rec*)iter.next()) != NULL) |
| 36 | rec->fPaint.~SkPaint(); |
| 37 | } |
| 38 | |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 39 | void SkLayerRasterizer::addLayer(const SkPaint& paint, SkScalar dx, |
| 40 | SkScalar dy) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 41 | SkLayerRasterizer_Rec* rec = (SkLayerRasterizer_Rec*)fLayers.push_back(); |
| 42 | |
tomhudson@google.com | 060ef18 | 2012-07-24 12:22:40 +0000 | [diff] [blame] | 43 | SkNEW_PLACEMENT_ARGS(&rec->fPaint, SkPaint, (paint)); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 44 | rec->fOffset.set(dx, dy); |
| 45 | } |
| 46 | |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 47 | static bool compute_bounds(const SkDeque& layers, const SkPath& path, |
| 48 | const SkMatrix& matrix, |
| 49 | const SkIRect* clipBounds, SkIRect* bounds) { |
reed@google.com | 4c09d5c | 2011-02-22 13:16:38 +0000 | [diff] [blame] | 50 | SkDeque::F2BIter iter(layers); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 51 | SkLayerRasterizer_Rec* rec; |
| 52 | |
| 53 | bounds->set(SK_MaxS32, SK_MaxS32, SK_MinS32, SK_MinS32); |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 54 | |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 55 | while ((rec = (SkLayerRasterizer_Rec*)iter.next()) != NULL) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 56 | const SkPaint& paint = rec->fPaint; |
| 57 | SkPath fillPath, devPath; |
| 58 | const SkPath* p = &path; |
| 59 | |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 60 | if (paint.getPathEffect() || paint.getStyle() != SkPaint::kFill_Style) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 61 | paint.getFillPath(path, &fillPath); |
| 62 | p = &fillPath; |
| 63 | } |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 64 | if (p->isEmpty()) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 65 | continue; |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 66 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 67 | |
| 68 | // apply the matrix and offset |
| 69 | { |
| 70 | SkMatrix m = matrix; |
| 71 | m.preTranslate(rec->fOffset.fX, rec->fOffset.fY); |
| 72 | p->transform(m, &devPath); |
| 73 | } |
| 74 | |
| 75 | SkMask mask; |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 76 | if (!SkDraw::DrawToMask(devPath, clipBounds, paint.getMaskFilter(), |
| 77 | &matrix, &mask, |
junov@chromium.org | 2ac4ef5 | 2012-04-04 15:16:51 +0000 | [diff] [blame] | 78 | SkMask::kJustComputeBounds_CreateMode, |
| 79 | SkPaint::kFill_Style)) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 80 | return false; |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 81 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 82 | |
| 83 | bounds->join(mask.fBounds); |
| 84 | } |
| 85 | return true; |
| 86 | } |
| 87 | |
| 88 | bool SkLayerRasterizer::onRasterize(const SkPath& path, const SkMatrix& matrix, |
| 89 | const SkIRect* clipBounds, |
reed@google.com | fdba404 | 2012-12-18 16:57:03 +0000 | [diff] [blame^] | 90 | SkMask* mask, SkMask::CreateMode mode) const { |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 91 | if (fLayers.empty()) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 92 | return false; |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 93 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 94 | |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 95 | if (SkMask::kJustRenderImage_CreateMode != mode) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 96 | if (!compute_bounds(fLayers, path, matrix, clipBounds, &mask->fBounds)) |
| 97 | return false; |
| 98 | } |
| 99 | |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 100 | if (SkMask::kComputeBoundsAndRenderImage_CreateMode == mode) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 101 | mask->fFormat = SkMask::kA8_Format; |
reed@android.com | 49f0ff2 | 2009-03-19 21:52:42 +0000 | [diff] [blame] | 102 | mask->fRowBytes = mask->fBounds.width(); |
reed@android.com | 543ed93 | 2009-04-24 12:43:40 +0000 | [diff] [blame] | 103 | size_t size = mask->computeImageSize(); |
| 104 | if (0 == size) { |
| 105 | return false; // too big to allocate, abort |
| 106 | } |
| 107 | mask->fImage = SkMask::AllocImage(size); |
| 108 | memset(mask->fImage, 0, size); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 109 | } |
| 110 | |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 111 | if (SkMask::kJustComputeBounds_CreateMode != mode) { |
reed@google.com | 045e62d | 2011-10-24 12:19:46 +0000 | [diff] [blame] | 112 | SkBitmap device; |
| 113 | SkRasterClip rectClip; |
| 114 | SkDraw draw; |
| 115 | SkMatrix translatedMatrix; // this translates us to our local pixels |
| 116 | SkMatrix drawMatrix; // this translates the path by each layer's offset |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 117 | |
reed@google.com | 045e62d | 2011-10-24 12:19:46 +0000 | [diff] [blame] | 118 | rectClip.setRect(SkIRect::MakeWH(mask->fBounds.width(), mask->fBounds.height())); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 119 | |
| 120 | translatedMatrix = matrix; |
| 121 | translatedMatrix.postTranslate(-SkIntToScalar(mask->fBounds.fLeft), |
| 122 | -SkIntToScalar(mask->fBounds.fTop)); |
| 123 | |
| 124 | device.setConfig(SkBitmap::kA8_Config, mask->fBounds.width(), mask->fBounds.height(), mask->fRowBytes); |
| 125 | device.setPixels(mask->fImage); |
| 126 | |
| 127 | draw.fBitmap = &device; |
| 128 | draw.fMatrix = &drawMatrix; |
reed@google.com | 045e62d | 2011-10-24 12:19:46 +0000 | [diff] [blame] | 129 | draw.fRC = &rectClip; |
| 130 | draw.fClip = &rectClip.bwRgn(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 131 | // we set the matrixproc in the loop, as the matrix changes each time (potentially) |
| 132 | draw.fBounder = NULL; |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 133 | |
reed@google.com | 4c09d5c | 2011-02-22 13:16:38 +0000 | [diff] [blame] | 134 | SkDeque::F2BIter iter(fLayers); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 135 | SkLayerRasterizer_Rec* rec; |
| 136 | |
| 137 | while ((rec = (SkLayerRasterizer_Rec*)iter.next()) != NULL) { |
| 138 | drawMatrix = translatedMatrix; |
| 139 | drawMatrix.preTranslate(rec->fOffset.fX, rec->fOffset.fY); |
| 140 | draw.drawPath(path, rec->fPaint); |
| 141 | } |
| 142 | } |
| 143 | return true; |
| 144 | } |
| 145 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 146 | SkLayerRasterizer::SkLayerRasterizer(SkFlattenableReadBuffer& buffer) |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 147 | : SkRasterizer(buffer), fLayers(sizeof(SkLayerRasterizer_Rec)) { |
djsollen@google.com | c73dd5c | 2012-08-07 15:54:32 +0000 | [diff] [blame] | 148 | int count = buffer.readInt(); |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 149 | |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 150 | for (int i = 0; i < count; i++) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 151 | SkLayerRasterizer_Rec* rec = (SkLayerRasterizer_Rec*)fLayers.push_back(); |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 152 | |
tomhudson@google.com | 060ef18 | 2012-07-24 12:22:40 +0000 | [diff] [blame] | 153 | SkNEW_PLACEMENT(&rec->fPaint, SkPaint); |
djsollen@google.com | c73dd5c | 2012-08-07 15:54:32 +0000 | [diff] [blame] | 154 | buffer.readPaint(&rec->fPaint); |
| 155 | buffer.readPoint(&rec->fOffset); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 156 | } |
| 157 | } |
| 158 | |
djsollen@google.com | 5492424 | 2012-03-29 15:18:04 +0000 | [diff] [blame] | 159 | void SkLayerRasterizer::flatten(SkFlattenableWriteBuffer& buffer) const { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 160 | this->INHERITED::flatten(buffer); |
| 161 | |
djsollen@google.com | c73dd5c | 2012-08-07 15:54:32 +0000 | [diff] [blame] | 162 | buffer.writeInt(fLayers.count()); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 163 | |
reed@google.com | 4c09d5c | 2011-02-22 13:16:38 +0000 | [diff] [blame] | 164 | SkDeque::F2BIter iter(fLayers); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 165 | const SkLayerRasterizer_Rec* rec; |
| 166 | |
mike@reedtribe.org | 3334c3a | 2011-04-20 11:39:28 +0000 | [diff] [blame] | 167 | while ((rec = (const SkLayerRasterizer_Rec*)iter.next()) != NULL) { |
djsollen@google.com | c73dd5c | 2012-08-07 15:54:32 +0000 | [diff] [blame] | 168 | buffer.writePaint(rec->fPaint); |
| 169 | buffer.writePoint(rec->fOffset); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 170 | } |
| 171 | } |