RecordingCanvas.cpp revision 0b7e8245db728d127ada698be63d78b33fc6e4da
1/* 2 * Copyright (C) 2015 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 "RecordingCanvas.h" 18 19#include "RecordedOp.h" 20#include "RenderNode.h" 21 22namespace android { 23namespace uirenderer { 24 25RecordingCanvas::RecordingCanvas(size_t width, size_t height) 26 : mState(*this) 27 , mResourceCache(ResourceCache::getInstance()) { 28 reset(width, height); 29} 30 31RecordingCanvas::~RecordingCanvas() { 32 LOG_ALWAYS_FATAL_IF(mDisplayList, 33 "Destroyed a RecordingCanvas during a record!"); 34} 35 36void RecordingCanvas::reset(int width, int height) { 37 LOG_ALWAYS_FATAL_IF(mDisplayList, 38 "prepareDirty called a second time during a recording!"); 39 mDisplayList = new DisplayList(); 40 41 mState.initializeSaveStack(width, height, 0, 0, width, height, Vector3()); 42 43 mDeferredBarrierType = kBarrier_InOrder; 44 mState.setDirtyClip(false); 45 mRestoreSaveCount = -1; 46} 47 48DisplayList* RecordingCanvas::finishRecording() { 49 mPaintMap.clear(); 50 mRegionMap.clear(); 51 mPathMap.clear(); 52 DisplayList* displayList = mDisplayList; 53 mDisplayList = nullptr; 54 mSkiaCanvasProxy.reset(nullptr); 55 return displayList; 56} 57 58SkCanvas* RecordingCanvas::asSkCanvas() { 59 LOG_ALWAYS_FATAL_IF(!mDisplayList, 60 "attempting to get an SkCanvas when we are not recording!"); 61 if (!mSkiaCanvasProxy) { 62 mSkiaCanvasProxy.reset(new SkiaCanvasProxy(this)); 63 } 64 65 // SkCanvas instances default to identity transform, but should inherit 66 // the state of this Canvas; if this code was in the SkiaCanvasProxy 67 // constructor, we couldn't cache mSkiaCanvasProxy. 68 SkMatrix parentTransform; 69 getMatrix(&parentTransform); 70 mSkiaCanvasProxy.get()->setMatrix(parentTransform); 71 72 return mSkiaCanvasProxy.get(); 73} 74 75// ---------------------------------------------------------------------------- 76// CanvasStateClient implementation 77// ---------------------------------------------------------------------------- 78 79void RecordingCanvas::onViewportInitialized() { 80} 81 82void RecordingCanvas::onSnapshotRestored(const Snapshot& removed, const Snapshot& restored) { 83 if (removed.flags & Snapshot::kFlagIsFboLayer) { 84 addOp(new (alloc()) EndLayerOp()); 85 } 86} 87 88// ---------------------------------------------------------------------------- 89// android/graphics/Canvas state operations 90// ---------------------------------------------------------------------------- 91// Save (layer) 92int RecordingCanvas::save(SkCanvas::SaveFlags flags) { 93 return mState.save((int) flags); 94} 95 96void RecordingCanvas::RecordingCanvas::restore() { 97 if (mRestoreSaveCount < 0) { 98 restoreToCount(getSaveCount() - 1); 99 return; 100 } 101 102 mRestoreSaveCount--; 103 mState.restore(); 104} 105 106void RecordingCanvas::restoreToCount(int saveCount) { 107 mRestoreSaveCount = saveCount; 108 mState.restoreToCount(saveCount); 109} 110 111int RecordingCanvas::saveLayer(float left, float top, float right, float bottom, const SkPaint* paint, 112 SkCanvas::SaveFlags flags) { 113 if (!(flags & SkCanvas::kClipToLayer_SaveFlag)) { 114 LOG_ALWAYS_FATAL("unclipped layers not supported"); 115 } 116 // force matrix/clip isolation for layer 117 flags |= SkCanvas::kClip_SaveFlag | SkCanvas::kMatrix_SaveFlag; 118 119 120 const Snapshot& previous = *mState.currentSnapshot(); 121 122 // initialize the snapshot as though it almost represents an FBO layer so deferred draw 123 // operations will be able to store and restore the current clip and transform info, and 124 // quick rejection will be correct (for display lists) 125 126 const Rect untransformedBounds(left, top, right, bottom); 127 128 // determine clipped bounds relative to previous viewport. 129 Rect visibleBounds = untransformedBounds; 130 previous.transform->mapRect(visibleBounds); 131 132 133 visibleBounds.doIntersect(previous.getRenderTargetClip()); 134 visibleBounds.snapToPixelBoundaries(); 135 136 Rect previousViewport(0, 0, previous.getViewportWidth(), previous.getViewportHeight()); 137 visibleBounds.doIntersect(previousViewport); 138 139 // Map visible bounds back to layer space, and intersect with parameter bounds 140 Rect layerBounds = visibleBounds; 141 Matrix4 inverse; 142 inverse.loadInverse(*previous.transform); 143 inverse.mapRect(layerBounds); 144 layerBounds.doIntersect(untransformedBounds); 145 146 int saveValue = mState.save((int) flags); 147 Snapshot& snapshot = *mState.writableSnapshot(); 148 149 // layerBounds is now original bounds, but with clipped to clip 150 // and viewport to ensure it's minimal size. 151 if (layerBounds.isEmpty() || untransformedBounds.isEmpty()) { 152 // Don't bother recording layer, since it's been rejected 153 snapshot.resetClip(0, 0, 0, 0); 154 return saveValue; 155 } 156 157 snapshot.flags |= Snapshot::kFlagFboTarget | Snapshot::kFlagIsFboLayer; 158 snapshot.initializeViewport(untransformedBounds.getWidth(), untransformedBounds.getHeight()); 159 snapshot.resetTransform(-untransformedBounds.left, -untransformedBounds.top, 0.0f); 160 161 Rect clip = layerBounds; 162 clip.translate(-untransformedBounds.left, -untransformedBounds.top); 163 snapshot.resetClip(clip.left, clip.top, clip.right, clip.bottom); 164 snapshot.roundRectClipState = nullptr; 165 166 addOp(new (alloc()) BeginLayerOp( 167 Rect(left, top, right, bottom), 168 *previous.transform, // transform to *draw* with 169 previous.getRenderTargetClip(), // clip to *draw* with 170 refPaint(paint))); 171 172 return saveValue; 173} 174 175// Matrix 176void RecordingCanvas::rotate(float degrees) { 177 if (degrees == 0) return; 178 179 mState.rotate(degrees); 180} 181 182void RecordingCanvas::scale(float sx, float sy) { 183 if (sx == 1 && sy == 1) return; 184 185 mState.scale(sx, sy); 186} 187 188void RecordingCanvas::skew(float sx, float sy) { 189 mState.skew(sx, sy); 190} 191 192void RecordingCanvas::translate(float dx, float dy) { 193 if (dx == 0 && dy == 0) return; 194 195 mState.translate(dx, dy, 0); 196} 197 198// Clip 199bool RecordingCanvas::getClipBounds(SkRect* outRect) const { 200 Rect bounds = mState.getLocalClipBounds(); 201 *outRect = SkRect::MakeLTRB(bounds.left, bounds.top, bounds.right, bounds.bottom); 202 return !(outRect->isEmpty()); 203} 204bool RecordingCanvas::quickRejectRect(float left, float top, float right, float bottom) const { 205 return mState.quickRejectConservative(left, top, right, bottom); 206} 207bool RecordingCanvas::quickRejectPath(const SkPath& path) const { 208 SkRect bounds = path.getBounds(); 209 return mState.quickRejectConservative(bounds.fLeft, bounds.fTop, bounds.fRight, bounds.fBottom); 210} 211bool RecordingCanvas::clipRect(float left, float top, float right, float bottom, SkRegion::Op op) { 212 return mState.clipRect(left, top, right, bottom, op); 213} 214bool RecordingCanvas::clipPath(const SkPath* path, SkRegion::Op op) { 215 return mState.clipPath(path, op); 216} 217bool RecordingCanvas::clipRegion(const SkRegion* region, SkRegion::Op op) { 218 return mState.clipRegion(region, op); 219} 220 221// ---------------------------------------------------------------------------- 222// android/graphics/Canvas draw operations 223// ---------------------------------------------------------------------------- 224void RecordingCanvas::drawColor(int color, SkXfermode::Mode mode) { 225 SkPaint paint; 226 paint.setColor(color); 227 paint.setXfermodeMode(mode); 228 drawPaint(paint); 229} 230 231void RecordingCanvas::drawPaint(const SkPaint& paint) { 232 // TODO: more efficient recording? 233 Matrix4 identity; 234 identity.loadIdentity(); 235 236 addOp(new (alloc()) RectOp( 237 mState.getRenderTargetClipBounds(), 238 identity, 239 mState.getRenderTargetClipBounds(), 240 refPaint(&paint))); 241} 242 243// Geometry 244void RecordingCanvas::drawPoints(const float* points, int count, const SkPaint& paint) { 245 LOG_ALWAYS_FATAL("TODO!"); 246} 247void RecordingCanvas::drawLines(const float* points, int count, const SkPaint& paint) { 248 LOG_ALWAYS_FATAL("TODO!"); 249} 250void RecordingCanvas::drawRect(float left, float top, float right, float bottom, const SkPaint& paint) { 251 addOp(new (alloc()) RectOp( 252 Rect(left, top, right, bottom), 253 *(mState.currentSnapshot()->transform), 254 mState.getRenderTargetClipBounds(), 255 refPaint(&paint))); 256} 257 258void RecordingCanvas::drawSimpleRects(const float* rects, int vertexCount, const SkPaint* paint) { 259 if (rects == nullptr) return; 260 261 Vertex* rectData = (Vertex*) mDisplayList->allocator.alloc(vertexCount * sizeof(Vertex)); 262 Vertex* vertex = rectData; 263 264 float left = FLT_MAX; 265 float top = FLT_MAX; 266 float right = FLT_MIN; 267 float bottom = FLT_MIN; 268 for (int index = 0; index < vertexCount; index += 4) { 269 float l = rects[index + 0]; 270 float t = rects[index + 1]; 271 float r = rects[index + 2]; 272 float b = rects[index + 3]; 273 274 Vertex::set(vertex++, l, t); 275 Vertex::set(vertex++, r, t); 276 Vertex::set(vertex++, l, b); 277 Vertex::set(vertex++, r, b); 278 279 left = std::min(left, l); 280 top = std::min(top, t); 281 right = std::max(right, r); 282 bottom = std::max(bottom, b); 283 } 284 addOp(new (alloc()) SimpleRectsOp( 285 Rect(left, top, right, bottom), 286 *(mState.currentSnapshot()->transform), 287 mState.getRenderTargetClipBounds(), 288 refPaint(paint), rectData, vertexCount)); 289} 290 291void RecordingCanvas::drawRegion(const SkRegion& region, const SkPaint& paint) { 292 if (paint.getStyle() == SkPaint::kFill_Style 293 && (!paint.isAntiAlias() || mState.currentTransform()->isSimple())) { 294 int count = 0; 295 Vector<float> rects; 296 SkRegion::Iterator it(region); 297 while (!it.done()) { 298 const SkIRect& r = it.rect(); 299 rects.push(r.fLeft); 300 rects.push(r.fTop); 301 rects.push(r.fRight); 302 rects.push(r.fBottom); 303 count += 4; 304 it.next(); 305 } 306 drawSimpleRects(rects.array(), count, &paint); 307 } else { 308 SkRegion::Iterator it(region); 309 while (!it.done()) { 310 const SkIRect& r = it.rect(); 311 drawRect(r.fLeft, r.fTop, r.fRight, r.fBottom, paint); 312 it.next(); 313 } 314 } 315} 316void RecordingCanvas::drawRoundRect(float left, float top, float right, float bottom, 317 float rx, float ry, const SkPaint& paint) { 318 LOG_ALWAYS_FATAL("TODO!"); 319} 320void RecordingCanvas::drawCircle(float x, float y, float radius, const SkPaint& paint) { 321 LOG_ALWAYS_FATAL("TODO!"); 322} 323void RecordingCanvas::drawOval(float left, float top, float right, float bottom, const SkPaint& paint) { 324 LOG_ALWAYS_FATAL("TODO!"); 325} 326void RecordingCanvas::drawArc(float left, float top, float right, float bottom, 327 float startAngle, float sweepAngle, bool useCenter, const SkPaint& paint) { 328 LOG_ALWAYS_FATAL("TODO!"); 329} 330void RecordingCanvas::drawPath(const SkPath& path, const SkPaint& paint) { 331 LOG_ALWAYS_FATAL("TODO!"); 332} 333 334// Bitmap-based 335void RecordingCanvas::drawBitmap(const SkBitmap& bitmap, float left, float top, const SkPaint* paint) { 336 save(SkCanvas::kMatrix_SaveFlag); 337 translate(left, top); 338 drawBitmap(&bitmap, paint); 339 restore(); 340} 341 342void RecordingCanvas::drawBitmap(const SkBitmap& bitmap, const SkMatrix& matrix, 343 const SkPaint* paint) { 344 if (matrix.isIdentity()) { 345 drawBitmap(&bitmap, paint); 346 } else if (!(matrix.getType() & ~(SkMatrix::kScale_Mask | SkMatrix::kTranslate_Mask)) 347 && MathUtils::isPositive(matrix.getScaleX()) 348 && MathUtils::isPositive(matrix.getScaleY())) { 349 // SkMatrix::isScaleTranslate() not available in L 350 SkRect src; 351 SkRect dst; 352 bitmap.getBounds(&src); 353 matrix.mapRect(&dst, src); 354 drawBitmap(bitmap, src.fLeft, src.fTop, src.fRight, src.fBottom, 355 dst.fLeft, dst.fTop, dst.fRight, dst.fBottom, paint); 356 } else { 357 save(SkCanvas::kMatrix_SaveFlag); 358 concat(matrix); 359 drawBitmap(&bitmap, paint); 360 restore(); 361 } 362} 363void RecordingCanvas::drawBitmap(const SkBitmap& bitmap, float srcLeft, float srcTop, 364 float srcRight, float srcBottom, float dstLeft, float dstTop, 365 float dstRight, float dstBottom, const SkPaint* paint) { 366 if (srcLeft == 0 && srcTop == 0 367 && srcRight == bitmap.width() 368 && srcBottom == bitmap.height() 369 && (srcBottom - srcTop == dstBottom - dstTop) 370 && (srcRight - srcLeft == dstRight - dstLeft)) { 371 // transform simple rect to rect drawing case into position bitmap ops, since they merge 372 save(SkCanvas::kMatrix_SaveFlag); 373 translate(dstLeft, dstTop); 374 drawBitmap(&bitmap, paint); 375 restore(); 376 } else { 377 LOG_ALWAYS_FATAL("TODO!"); 378 } 379} 380void RecordingCanvas::drawBitmapMesh(const SkBitmap& bitmap, int meshWidth, int meshHeight, 381 const float* vertices, const int* colors, const SkPaint* paint) { 382 LOG_ALWAYS_FATAL("TODO!"); 383} 384void RecordingCanvas::drawNinePatch(const SkBitmap& bitmap, const android::Res_png_9patch& chunk, 385 float dstLeft, float dstTop, float dstRight, float dstBottom, 386 const SkPaint* paint) { 387 LOG_ALWAYS_FATAL("TODO!"); 388} 389 390// Text 391void RecordingCanvas::drawText(const uint16_t* glyphs, const float* positions, int count, 392 const SkPaint& paint, float x, float y, float boundsLeft, float boundsTop, 393 float boundsRight, float boundsBottom, float totalAdvance) { 394 LOG_ALWAYS_FATAL("TODO!"); 395} 396void RecordingCanvas::drawPosText(const uint16_t* text, const float* positions, int count, 397 int posCount, const SkPaint& paint) { 398 LOG_ALWAYS_FATAL("TODO!"); 399} 400void RecordingCanvas::drawTextOnPath(const uint16_t* glyphs, int count, const SkPath& path, 401 float hOffset, float vOffset, const SkPaint& paint) { 402 LOG_ALWAYS_FATAL("TODO!"); 403} 404 405void RecordingCanvas::drawBitmap(const SkBitmap* bitmap, const SkPaint* paint) { 406 addOp(new (alloc()) BitmapOp( 407 Rect(0, 0, bitmap->width(), bitmap->height()), 408 *(mState.currentSnapshot()->transform), 409 mState.getRenderTargetClipBounds(), 410 refPaint(paint), refBitmap(*bitmap))); 411} 412void RecordingCanvas::drawRenderNode(RenderNode* renderNode) { 413 RenderNodeOp* op = new (alloc()) RenderNodeOp( 414 Rect(0, 0, renderNode->getWidth(), renderNode->getHeight()), // are these safe? they're theoretically dynamic 415 *(mState.currentSnapshot()->transform), 416 mState.getRenderTargetClipBounds(), 417 renderNode); 418 int opIndex = addOp(op); 419 int childIndex = mDisplayList->addChild(op); 420 421 // update the chunk's child indices 422 DisplayList::Chunk& chunk = mDisplayList->chunks.back(); 423 chunk.endChildIndex = childIndex + 1; 424 425 if (renderNode->stagingProperties().isProjectionReceiver()) { 426 // use staging property, since recording on UI thread 427 mDisplayList->projectionReceiveIndex = opIndex; 428 } 429} 430 431size_t RecordingCanvas::addOp(RecordedOp* op) { 432 // TODO: validate if "addDrawOp" quickrejection logic is useful before adding 433 int insertIndex = mDisplayList->ops.size(); 434 mDisplayList->ops.push_back(op); 435 if (mDeferredBarrierType != kBarrier_None) { 436 // op is first in new chunk 437 mDisplayList->chunks.emplace_back(); 438 DisplayList::Chunk& newChunk = mDisplayList->chunks.back(); 439 newChunk.beginOpIndex = insertIndex; 440 newChunk.endOpIndex = insertIndex + 1; 441 newChunk.reorderChildren = (mDeferredBarrierType == kBarrier_OutOfOrder); 442 443 int nextChildIndex = mDisplayList->children.size(); 444 newChunk.beginChildIndex = newChunk.endChildIndex = nextChildIndex; 445 mDeferredBarrierType = kBarrier_None; 446 } else { 447 // standard case - append to existing chunk 448 mDisplayList->chunks.back().endOpIndex = insertIndex + 1; 449 } 450 return insertIndex; 451} 452 453void RecordingCanvas::refBitmapsInShader(const SkShader* shader) { 454 if (!shader) return; 455 456 // If this paint has an SkShader that has an SkBitmap add 457 // it to the bitmap pile 458 SkBitmap bitmap; 459 SkShader::TileMode xy[2]; 460 if (shader->isABitmap(&bitmap, nullptr, xy)) { 461 refBitmap(bitmap); 462 return; 463 } 464 SkShader::ComposeRec rec; 465 if (shader->asACompose(&rec)) { 466 refBitmapsInShader(rec.fShaderA); 467 refBitmapsInShader(rec.fShaderB); 468 return; 469 } 470} 471 472}; // namespace uirenderer 473}; // namespace android 474