Romain Guy | ada4d53 | 2012-02-02 17:31:16 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2012 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #include "Snapshot.h" |
| 18 | |
| 19 | #include <SkCanvas.h> |
| 20 | |
| 21 | namespace android { |
| 22 | namespace uirenderer { |
| 23 | |
| 24 | /////////////////////////////////////////////////////////////////////////////// |
| 25 | // Constructors |
| 26 | /////////////////////////////////////////////////////////////////////////////// |
| 27 | |
| 28 | Snapshot::Snapshot(): flags(0), previous(NULL), layer(NULL), fbo(0), |
Chet Haase | db8c9a6 | 2012-03-21 18:54:18 -0700 | [diff] [blame] | 29 | invisible(false), empty(false), alpha(1.0f) { |
Romain Guy | ada4d53 | 2012-02-02 17:31:16 -0800 | [diff] [blame] | 30 | |
| 31 | transform = &mTransformRoot; |
| 32 | clipRect = &mClipRectRoot; |
| 33 | region = NULL; |
Romain Guy | 967e2bf | 2012-02-07 17:04:34 -0800 | [diff] [blame] | 34 | clipRegion = NULL; |
Romain Guy | ada4d53 | 2012-02-02 17:31:16 -0800 | [diff] [blame] | 35 | } |
| 36 | |
| 37 | /** |
| 38 | * Copies the specified snapshot/ The specified snapshot is stored as |
| 39 | * the previous snapshot. |
| 40 | */ |
| 41 | Snapshot::Snapshot(const sp<Snapshot>& s, int saveFlags): |
| 42 | flags(0), previous(s), layer(NULL), fbo(s->fbo), |
| 43 | invisible(s->invisible), empty(false), |
Chet Haase | db8c9a6 | 2012-03-21 18:54:18 -0700 | [diff] [blame] | 44 | viewport(s->viewport), height(s->height), alpha(s->alpha) { |
Romain Guy | ada4d53 | 2012-02-02 17:31:16 -0800 | [diff] [blame] | 45 | |
Romain Guy | 21c9c85 | 2012-02-07 18:22:07 -0800 | [diff] [blame] | 46 | clipRegion = NULL; |
| 47 | |
Romain Guy | ada4d53 | 2012-02-02 17:31:16 -0800 | [diff] [blame] | 48 | if (saveFlags & SkCanvas::kMatrix_SaveFlag) { |
| 49 | mTransformRoot.load(*s->transform); |
| 50 | transform = &mTransformRoot; |
| 51 | } else { |
| 52 | transform = s->transform; |
| 53 | } |
| 54 | |
| 55 | if (saveFlags & SkCanvas::kClip_SaveFlag) { |
| 56 | mClipRectRoot.set(*s->clipRect); |
| 57 | clipRect = &mClipRectRoot; |
Romain Guy | 967e2bf | 2012-02-07 17:04:34 -0800 | [diff] [blame] | 58 | #if STENCIL_BUFFER_SIZE |
| 59 | if (s->clipRegion) { |
Romain Guy | 0baaac5 | 2012-08-31 20:31:01 -0700 | [diff] [blame] | 60 | mClipRegionRoot.op(*s->clipRegion, SkRegion::kUnion_Op); |
Romain Guy | 967e2bf | 2012-02-07 17:04:34 -0800 | [diff] [blame] | 61 | clipRegion = &mClipRegionRoot; |
Romain Guy | 967e2bf | 2012-02-07 17:04:34 -0800 | [diff] [blame] | 62 | } |
Romain Guy | 967e2bf | 2012-02-07 17:04:34 -0800 | [diff] [blame] | 63 | #endif |
Romain Guy | ada4d53 | 2012-02-02 17:31:16 -0800 | [diff] [blame] | 64 | } else { |
| 65 | clipRect = s->clipRect; |
Romain Guy | 967e2bf | 2012-02-07 17:04:34 -0800 | [diff] [blame] | 66 | #if STENCIL_BUFFER_SIZE |
| 67 | clipRegion = s->clipRegion; |
| 68 | #endif |
Romain Guy | ada4d53 | 2012-02-02 17:31:16 -0800 | [diff] [blame] | 69 | } |
| 70 | |
| 71 | if (s->flags & Snapshot::kFlagFboTarget) { |
| 72 | flags |= Snapshot::kFlagFboTarget; |
| 73 | region = s->region; |
| 74 | } else { |
| 75 | region = NULL; |
| 76 | } |
| 77 | } |
| 78 | |
| 79 | /////////////////////////////////////////////////////////////////////////////// |
| 80 | // Clipping |
| 81 | /////////////////////////////////////////////////////////////////////////////// |
| 82 | |
Romain Guy | 967e2bf | 2012-02-07 17:04:34 -0800 | [diff] [blame] | 83 | void Snapshot::ensureClipRegion() { |
| 84 | #if STENCIL_BUFFER_SIZE |
| 85 | if (!clipRegion) { |
| 86 | clipRegion = &mClipRegionRoot; |
Romain Guy | 0baaac5 | 2012-08-31 20:31:01 -0700 | [diff] [blame] | 87 | clipRegion->setRect(clipRect->left, clipRect->top, clipRect->right, clipRect->bottom); |
Romain Guy | 967e2bf | 2012-02-07 17:04:34 -0800 | [diff] [blame] | 88 | } |
| 89 | #endif |
| 90 | } |
| 91 | |
| 92 | void Snapshot::copyClipRectFromRegion() { |
| 93 | #if STENCIL_BUFFER_SIZE |
| 94 | if (!clipRegion->isEmpty()) { |
Romain Guy | 0baaac5 | 2012-08-31 20:31:01 -0700 | [diff] [blame] | 95 | const SkIRect& bounds = clipRegion->getBounds(); |
| 96 | clipRect->set(bounds.fLeft, bounds.fTop, bounds.fRight, bounds.fBottom); |
Romain Guy | 967e2bf | 2012-02-07 17:04:34 -0800 | [diff] [blame] | 97 | |
| 98 | if (clipRegion->isRect()) { |
Romain Guy | 0baaac5 | 2012-08-31 20:31:01 -0700 | [diff] [blame] | 99 | clipRegion->setEmpty(); |
Romain Guy | 967e2bf | 2012-02-07 17:04:34 -0800 | [diff] [blame] | 100 | clipRegion = NULL; |
| 101 | } |
| 102 | } else { |
| 103 | clipRect->setEmpty(); |
| 104 | clipRegion = NULL; |
| 105 | } |
| 106 | #endif |
| 107 | } |
| 108 | |
Romain Guy | 0baaac5 | 2012-08-31 20:31:01 -0700 | [diff] [blame] | 109 | bool Snapshot::clipRegionOp(float left, float top, float right, float bottom, SkRegion::Op op) { |
Romain Guy | 967e2bf | 2012-02-07 17:04:34 -0800 | [diff] [blame] | 110 | #if STENCIL_BUFFER_SIZE |
Romain Guy | 0baaac5 | 2012-08-31 20:31:01 -0700 | [diff] [blame] | 111 | SkIRect tmp; |
| 112 | tmp.set(left, top, right, bottom); |
| 113 | clipRegion->op(tmp, op); |
Romain Guy | 967e2bf | 2012-02-07 17:04:34 -0800 | [diff] [blame] | 114 | copyClipRectFromRegion(); |
| 115 | return true; |
| 116 | #else |
| 117 | return false; |
| 118 | #endif |
| 119 | } |
| 120 | |
Romain Guy | ada4d53 | 2012-02-02 17:31:16 -0800 | [diff] [blame] | 121 | bool Snapshot::clip(float left, float top, float right, float bottom, SkRegion::Op op) { |
| 122 | Rect r(left, top, right, bottom); |
| 123 | transform->mapRect(r); |
| 124 | return clipTransformed(r, op); |
| 125 | } |
| 126 | |
| 127 | bool Snapshot::clipTransformed(const Rect& r, SkRegion::Op op) { |
| 128 | bool clipped = false; |
| 129 | |
Romain Guy | ada4d53 | 2012-02-02 17:31:16 -0800 | [diff] [blame] | 130 | switch (op) { |
Romain Guy | 967e2bf | 2012-02-07 17:04:34 -0800 | [diff] [blame] | 131 | case SkRegion::kIntersect_Op: { |
| 132 | if (CC_UNLIKELY(clipRegion)) { |
Romain Guy | 0baaac5 | 2012-08-31 20:31:01 -0700 | [diff] [blame] | 133 | clipped = clipRegionOp(r.left, r.top, r.right, r.bottom, SkRegion::kIntersect_Op); |
Romain Guy | 967e2bf | 2012-02-07 17:04:34 -0800 | [diff] [blame] | 134 | } else { |
| 135 | clipped = clipRect->intersect(r); |
| 136 | if (!clipped) { |
| 137 | clipRect->setEmpty(); |
| 138 | clipped = true; |
| 139 | } |
Romain Guy | ada4d53 | 2012-02-02 17:31:16 -0800 | [diff] [blame] | 140 | } |
| 141 | break; |
Romain Guy | 967e2bf | 2012-02-07 17:04:34 -0800 | [diff] [blame] | 142 | } |
| 143 | case SkRegion::kUnion_Op: { |
| 144 | if (CC_UNLIKELY(clipRegion)) { |
Romain Guy | 0baaac5 | 2012-08-31 20:31:01 -0700 | [diff] [blame] | 145 | clipped = clipRegionOp(r.left, r.top, r.right, r.bottom, SkRegion::kUnion_Op); |
Romain Guy | 967e2bf | 2012-02-07 17:04:34 -0800 | [diff] [blame] | 146 | } else { |
| 147 | clipped = clipRect->unionWith(r); |
| 148 | } |
Romain Guy | ada4d53 | 2012-02-02 17:31:16 -0800 | [diff] [blame] | 149 | break; |
Romain Guy | 967e2bf | 2012-02-07 17:04:34 -0800 | [diff] [blame] | 150 | } |
Romain Guy | 967e2bf | 2012-02-07 17:04:34 -0800 | [diff] [blame] | 151 | case SkRegion::kReplace_Op: { |
| 152 | setClip(r.left, r.top, r.right, r.bottom); |
Romain Guy | ada4d53 | 2012-02-02 17:31:16 -0800 | [diff] [blame] | 153 | clipped = true; |
| 154 | break; |
Romain Guy | 967e2bf | 2012-02-07 17:04:34 -0800 | [diff] [blame] | 155 | } |
Romain Guy | 0baaac5 | 2012-08-31 20:31:01 -0700 | [diff] [blame] | 156 | default: { |
| 157 | ensureClipRegion(); |
| 158 | clipped = clipRegionOp(r.left, r.top, r.right, r.bottom, op); |
| 159 | break; |
| 160 | } |
Romain Guy | ada4d53 | 2012-02-02 17:31:16 -0800 | [diff] [blame] | 161 | } |
| 162 | |
| 163 | if (clipped) { |
| 164 | flags |= Snapshot::kFlagClipSet; |
| 165 | } |
| 166 | |
| 167 | return clipped; |
| 168 | } |
| 169 | |
| 170 | void Snapshot::setClip(float left, float top, float right, float bottom) { |
| 171 | clipRect->set(left, top, right, bottom); |
Romain Guy | 21c9c85 | 2012-02-07 18:22:07 -0800 | [diff] [blame] | 172 | #if STENCIL_BUFFER_SIZE |
Romain Guy | 967e2bf | 2012-02-07 17:04:34 -0800 | [diff] [blame] | 173 | if (clipRegion) { |
Romain Guy | 0baaac5 | 2012-08-31 20:31:01 -0700 | [diff] [blame] | 174 | clipRegion->setEmpty(); |
Romain Guy | 967e2bf | 2012-02-07 17:04:34 -0800 | [diff] [blame] | 175 | clipRegion = NULL; |
| 176 | } |
Romain Guy | 21c9c85 | 2012-02-07 18:22:07 -0800 | [diff] [blame] | 177 | #endif |
Romain Guy | ada4d53 | 2012-02-02 17:31:16 -0800 | [diff] [blame] | 178 | flags |= Snapshot::kFlagClipSet; |
| 179 | } |
| 180 | |
Romain Guy | a3dc55f | 2012-09-28 13:55:44 -0700 | [diff] [blame^] | 181 | bool Snapshot::hasPerspectiveTransform() const { |
| 182 | return transform->isPerspective(); |
| 183 | } |
| 184 | |
Romain Guy | ada4d53 | 2012-02-02 17:31:16 -0800 | [diff] [blame] | 185 | const Rect& Snapshot::getLocalClip() { |
| 186 | mat4 inverse; |
| 187 | inverse.loadInverse(*transform); |
| 188 | |
| 189 | mLocalClip.set(*clipRect); |
| 190 | inverse.mapRect(mLocalClip); |
| 191 | |
| 192 | return mLocalClip; |
| 193 | } |
| 194 | |
| 195 | void Snapshot::resetClip(float left, float top, float right, float bottom) { |
| 196 | clipRect = &mClipRectRoot; |
Romain Guy | 967e2bf | 2012-02-07 17:04:34 -0800 | [diff] [blame] | 197 | setClip(left, top, right, bottom); |
Romain Guy | ada4d53 | 2012-02-02 17:31:16 -0800 | [diff] [blame] | 198 | } |
| 199 | |
| 200 | /////////////////////////////////////////////////////////////////////////////// |
| 201 | // Transforms |
| 202 | /////////////////////////////////////////////////////////////////////////////// |
| 203 | |
| 204 | void Snapshot::resetTransform(float x, float y, float z) { |
| 205 | transform = &mTransformRoot; |
| 206 | transform->loadTranslate(x, y, z); |
| 207 | } |
| 208 | |
| 209 | /////////////////////////////////////////////////////////////////////////////// |
| 210 | // Queries |
| 211 | /////////////////////////////////////////////////////////////////////////////// |
| 212 | |
| 213 | bool Snapshot::isIgnored() const { |
| 214 | return invisible || empty; |
| 215 | } |
| 216 | |
| 217 | }; // namespace uirenderer |
| 218 | }; // namespace android |