widget/gonk/HwcComposer2D.cpp@ac0c01689b40
widget/gonk/HwcComposer2D.cpp
Thu, 15 Jan 2015 15:59:08 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 15 Jan 2015 15:59:08 +0100
- branch
- TOR_BUG_9701
- changeset 10
- ac0c01689b40
- permissions
- -rw-r--r--
Implement a real Private Browsing Mode condition by changing the API/ABI;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
1 /*
2 * Copyright (c) 2012, 2013 The Linux Foundation. All rights reserved.
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 */
17 #include <android/log.h>
18 #include <string.h>
20 #include "libdisplay/GonkDisplay.h"
21 #include "Framebuffer.h"
22 #include "GLContext.h" // for GLContext
23 #include "HwcUtils.h"
24 #include "HwcComposer2D.h"
25 #include "mozilla/layers/LayerManagerComposite.h"
26 #include "mozilla/layers/PLayerTransaction.h"
27 #include "mozilla/layers/ShadowLayerUtilsGralloc.h"
28 #include "mozilla/layers/TextureHostOGL.h" // for TextureHostOGL
29 #include "mozilla/StaticPtr.h"
30 #include "cutils/properties.h"
31 #include "gfx2DGlue.h"
33 #if ANDROID_VERSION >= 17
34 #include "libdisplay/FramebufferSurface.h"
35 #ifndef HWC_BLIT
36 #define HWC_BLIT (HWC_FRAMEBUFFER_TARGET + 1)
37 #endif
38 #endif
40 #ifdef LOG_TAG
41 #undef LOG_TAG
42 #endif
43 #define LOG_TAG "HWComposer"
45 /*
46 * By default the debug message of hwcomposer (LOG_DEBUG level) are undefined,
47 * but can be enabled by uncommenting HWC_DEBUG below.
48 */
49 //#define HWC_DEBUG
51 #ifdef HWC_DEBUG
52 #define LOGD(args...) __android_log_print(ANDROID_LOG_DEBUG, LOG_TAG, ## args)
53 #else
54 #define LOGD(args...) ((void)0)
55 #endif
57 #define LOGI(args...) __android_log_print(ANDROID_LOG_INFO, LOG_TAG, ## args)
58 #define LOGE(args...) __android_log_print(ANDROID_LOG_ERROR, LOG_TAG, ## args)
60 #define LAYER_COUNT_INCREMENTS 5
62 using namespace android;
63 using namespace mozilla::layers;
65 namespace mozilla {
67 static StaticRefPtr<HwcComposer2D> sInstance;
69 HwcComposer2D::HwcComposer2D()
70 : mHwc(nullptr)
71 , mList(nullptr)
72 , mMaxLayerCount(0)
73 , mColorFill(false)
74 , mRBSwapSupport(false)
75 #if ANDROID_VERSION >= 17
76 , mPrevRetireFence(Fence::NO_FENCE)
77 , mPrevDisplayFence(Fence::NO_FENCE)
78 #endif
79 , mPrepared(false)
80 {
81 }
83 HwcComposer2D::~HwcComposer2D() {
84 free(mList);
85 }
87 int
88 HwcComposer2D::Init(hwc_display_t dpy, hwc_surface_t sur)
89 {
90 MOZ_ASSERT(!Initialized());
92 mHwc = (HwcDevice*)GetGonkDisplay()->GetHWCDevice();
93 if (!mHwc) {
94 LOGE("Failed to initialize hwc");
95 return -1;
96 }
98 nsIntSize screenSize;
100 mozilla::Framebuffer::GetSize(&screenSize);
101 mScreenRect = nsIntRect(nsIntPoint(0, 0), screenSize);
103 #if ANDROID_VERSION >= 17
104 int supported = 0;
106 if (mHwc->query) {
107 if (mHwc->query(mHwc, HwcUtils::HWC_COLOR_FILL, &supported) == NO_ERROR) {
108 mColorFill = !!supported;
109 }
110 if (mHwc->query(mHwc, HwcUtils::HWC_FORMAT_RB_SWAP, &supported) == NO_ERROR) {
111 mRBSwapSupport = !!supported;
112 }
113 } else {
114 mColorFill = false;
115 mRBSwapSupport = false;
116 }
117 #else
118 char propValue[PROPERTY_VALUE_MAX];
119 property_get("ro.display.colorfill", propValue, "0");
120 mColorFill = (atoi(propValue) == 1) ? true : false;
121 mRBSwapSupport = true;
122 #endif
124 mDpy = dpy;
125 mSur = sur;
127 return 0;
128 }
130 HwcComposer2D*
131 HwcComposer2D::GetInstance()
132 {
133 if (!sInstance) {
134 LOGI("Creating new instance");
135 sInstance = new HwcComposer2D();
136 }
137 return sInstance;
138 }
140 bool
141 HwcComposer2D::ReallocLayerList()
142 {
143 int size = sizeof(HwcList) +
144 ((mMaxLayerCount + LAYER_COUNT_INCREMENTS) * sizeof(HwcLayer));
146 HwcList* listrealloc = (HwcList*)realloc(mList, size);
148 if (!listrealloc) {
149 return false;
150 }
152 if (!mList) {
153 //first alloc, initialize
154 listrealloc->numHwLayers = 0;
155 listrealloc->flags = 0;
156 }
158 mList = listrealloc;
159 mMaxLayerCount += LAYER_COUNT_INCREMENTS;
160 return true;
161 }
163 void
164 HwcComposer2D::setCrop(HwcLayer* layer, hwc_rect_t srcCrop)
165 {
166 #if ANDROID_VERSION >= 19
167 if (mHwc->common.version >= HWC_DEVICE_API_VERSION_1_3) {
168 layer->sourceCropf.left = srcCrop.left;
169 layer->sourceCropf.top = srcCrop.top;
170 layer->sourceCropf.right = srcCrop.right;
171 layer->sourceCropf.bottom = srcCrop.bottom;
172 } else {
173 layer->sourceCrop = srcCrop;
174 }
175 #else
176 layer->sourceCrop = srcCrop;
177 #endif
178 }
180 void
181 HwcComposer2D::setHwcGeometry(bool aGeometryChanged)
182 {
183 #if ANDROID_VERSION >= 19
184 mList->flags = aGeometryChanged ? HWC_GEOMETRY_CHANGED : 0;
185 #else
186 mList->flags = HWC_GEOMETRY_CHANGED;
187 #endif
188 }
190 bool
191 HwcComposer2D::PrepareLayerList(Layer* aLayer,
192 const nsIntRect& aClip,
193 const gfxMatrix& aParentTransform,
194 const gfxMatrix& aGLWorldTransform)
195 {
196 // NB: we fall off this path whenever there are container layers
197 // that require intermediate surfaces. That means all the
198 // GetEffective*() coordinates are relative to the framebuffer.
200 bool fillColor = false;
202 const nsIntRegion& visibleRegion = aLayer->GetEffectiveVisibleRegion();
203 if (visibleRegion.IsEmpty()) {
204 return true;
205 }
207 uint8_t opacity = std::min(0xFF, (int)(aLayer->GetEffectiveOpacity() * 256.0));
208 #if ANDROID_VERSION < 18
209 if (opacity < 0xFF) {
210 LOGD("%s Layer has planar semitransparency which is unsupported", aLayer->Name());
211 return false;
212 }
213 #endif
215 nsIntRect clip;
216 if (!HwcUtils::CalculateClipRect(aParentTransform * aGLWorldTransform,
217 aLayer->GetEffectiveClipRect(),
218 aClip,
219 &clip))
220 {
221 LOGD("%s Clip rect is empty. Skip layer", aLayer->Name());
222 return true;
223 }
225 // HWC supports only the following 2D transformations:
226 //
227 // Scaling via the sourceCrop and displayFrame in HwcLayer
228 // Translation via the sourceCrop and displayFrame in HwcLayer
229 // Rotation (in square angles only) via the HWC_TRANSFORM_ROT_* flags
230 // Reflection (horizontal and vertical) via the HWC_TRANSFORM_FLIP_* flags
231 //
232 // A 2D transform with PreservesAxisAlignedRectangles() has all the attributes
233 // above
234 gfxMatrix transform;
235 gfx3DMatrix transform3D;
236 gfx::To3DMatrix(aLayer->GetEffectiveTransform(), transform3D);
238 if (!transform3D.Is2D(&transform) || !transform.PreservesAxisAlignedRectangles()) {
239 LOGD("Layer has a 3D transform or a non-square angle rotation");
240 return false;
241 }
244 if (ContainerLayer* container = aLayer->AsContainerLayer()) {
245 nsAutoTArray<Layer*, 12> children;
246 container->SortChildrenBy3DZOrder(children);
248 for (uint32_t i = 0; i < children.Length(); i++) {
249 if (!PrepareLayerList(children[i], clip, transform, aGLWorldTransform)) {
250 return false;
251 }
252 }
253 return true;
254 }
256 LayerRenderState state = aLayer->GetRenderState();
257 nsIntSize surfaceSize;
259 if (state.mSurface.get()) {
260 surfaceSize = state.mSize;
261 } else {
262 if (aLayer->AsColorLayer() && mColorFill) {
263 fillColor = true;
264 } else {
265 LOGD("%s Layer doesn't have a gralloc buffer", aLayer->Name());
266 return false;
267 }
268 }
269 // Buffer rotation is not to be confused with the angled rotation done by a transform matrix
270 // It's a fancy ThebesLayer feature used for scrolling
271 if (state.BufferRotated()) {
272 LOGD("%s Layer has a rotated buffer", aLayer->Name());
273 return false;
274 }
276 nsIntRect visibleRect = visibleRegion.GetBounds();
278 nsIntRect bufferRect;
279 if (fillColor) {
280 bufferRect = nsIntRect(visibleRect);
281 } else {
282 if(state.mHasOwnOffset) {
283 bufferRect = nsIntRect(state.mOffset.x, state.mOffset.y,
284 state.mSize.width, state.mSize.height);
285 } else {
286 //Since the buffer doesn't have its own offset, assign the whole
287 //surface size as its buffer bounds
288 bufferRect = nsIntRect(0, 0, state.mSize.width, state.mSize.height);
289 }
290 }
292 hwc_rect_t sourceCrop, displayFrame;
293 if(!HwcUtils::PrepareLayerRects(visibleRect,
294 transform * aGLWorldTransform,
295 clip,
296 bufferRect,
297 state.YFlipped(),
298 &(sourceCrop),
299 &(displayFrame)))
300 {
301 return true;
302 }
304 // OK! We can compose this layer with hwc.
305 int current = mList ? mList->numHwLayers : 0;
307 // Do not compose any layer below full-screen Opaque layer
308 // Note: It can be generalized to non-fullscreen Opaque layers.
309 bool isOpaque = (opacity == 0xFF) && (aLayer->GetContentFlags() & Layer::CONTENT_OPAQUE);
310 if (current && isOpaque) {
311 nsIntRect displayRect = nsIntRect(displayFrame.left, displayFrame.top,
312 displayFrame.right - displayFrame.left, displayFrame.bottom - displayFrame.top);
313 if (displayRect.Contains(mScreenRect)) {
314 // In z-order, all previous layers are below
315 // the current layer. We can ignore them now.
316 mList->numHwLayers = current = 0;
317 mHwcLayerMap.Clear();
318 }
319 }
321 if (!mList || current >= mMaxLayerCount) {
322 if (!ReallocLayerList() || current >= mMaxLayerCount) {
323 LOGE("PrepareLayerList failed! Could not increase the maximum layer count");
324 return false;
325 }
326 }
328 HwcLayer& hwcLayer = mList->hwLayers[current];
329 hwcLayer.flags = 0;
331 if (ContainerLayer* parent = aLayer->GetParent()) {
332 if (parent->UseIntermediateSurface()) {
333 LOGD("Parent container needs intermediate surface");
334 hwcLayer.flags = HWC_SKIP_LAYER;
335 #if ANDROID_VERSION < 18
336 // No partial HWC Composition on older versions
337 return false;
338 #endif
339 }
340 }
342 hwcLayer.displayFrame = displayFrame;
343 setCrop(&hwcLayer, sourceCrop);
344 buffer_handle_t handle = fillColor ? nullptr : state.mSurface->getNativeBuffer()->handle;
345 hwcLayer.handle = handle;
347 hwcLayer.hints = 0;
348 hwcLayer.blending = isOpaque ? HWC_BLENDING_NONE : HWC_BLENDING_PREMULT;
349 #if ANDROID_VERSION >= 17
350 hwcLayer.compositionType = HWC_FRAMEBUFFER;
352 hwcLayer.acquireFenceFd = -1;
353 hwcLayer.releaseFenceFd = -1;
354 #if ANDROID_VERSION >= 18
355 hwcLayer.planeAlpha = opacity;
356 #endif
357 #else
358 hwcLayer.compositionType = HwcUtils::HWC_USE_COPYBIT;
359 #endif
361 if (!fillColor) {
362 if (state.FormatRBSwapped()) {
363 if (!mRBSwapSupport) {
364 LOGD("No R/B swap support in H/W Composer");
365 return false;
366 }
367 hwcLayer.flags |= HwcUtils::HWC_FORMAT_RB_SWAP;
368 }
370 // Translation and scaling have been addressed in PrepareLayerRects().
371 // Given the above and that we checked for PreservesAxisAlignedRectangles()
372 // the only possible transformations left to address are
373 // square angle rotation and horizontal/vertical reflection.
374 //
375 // The rotation and reflection permutations total 16 but can be
376 // reduced to 8 transformations after eliminating redundancies.
377 //
378 // All matrices represented here are in the form
379 //
380 // | xx xy |
381 // | yx yy |
382 //
383 // And ignore scaling.
384 //
385 // Reflection is applied before rotation
386 gfxMatrix rotation = transform * aGLWorldTransform;
387 // Compute fuzzy zero like PreservesAxisAlignedRectangles()
388 if (fabs(rotation.xx) < 1e-6) {
389 if (rotation.xy < 0) {
390 if (rotation.yx > 0) {
391 // 90 degree rotation
392 //
393 // | 0 -1 |
394 // | 1 0 |
395 //
396 hwcLayer.transform = HWC_TRANSFORM_ROT_90;
397 LOGD("Layer rotated 90 degrees");
398 }
399 else {
400 // Horizontal reflection then 90 degree rotation
401 //
402 // | 0 -1 | | -1 0 | = | 0 -1 |
403 // | 1 0 | | 0 1 | | -1 0 |
404 //
405 // same as vertical reflection then 270 degree rotation
406 //
407 // | 0 1 | | 1 0 | = | 0 -1 |
408 // | -1 0 | | 0 -1 | | -1 0 |
409 //
410 hwcLayer.transform = HWC_TRANSFORM_ROT_90 | HWC_TRANSFORM_FLIP_H;
411 LOGD("Layer vertically reflected then rotated 270 degrees");
412 }
413 } else {
414 if (rotation.yx < 0) {
415 // 270 degree rotation
416 //
417 // | 0 1 |
418 // | -1 0 |
419 //
420 hwcLayer.transform = HWC_TRANSFORM_ROT_270;
421 LOGD("Layer rotated 270 degrees");
422 }
423 else {
424 // Vertical reflection then 90 degree rotation
425 //
426 // | 0 1 | | -1 0 | = | 0 1 |
427 // | -1 0 | | 0 1 | | 1 0 |
428 //
429 // Same as horizontal reflection then 270 degree rotation
430 //
431 // | 0 -1 | | 1 0 | = | 0 1 |
432 // | 1 0 | | 0 -1 | | 1 0 |
433 //
434 hwcLayer.transform = HWC_TRANSFORM_ROT_90 | HWC_TRANSFORM_FLIP_V;
435 LOGD("Layer horizontally reflected then rotated 270 degrees");
436 }
437 }
438 } else if (rotation.xx < 0) {
439 if (rotation.yy > 0) {
440 // Horizontal reflection
441 //
442 // | -1 0 |
443 // | 0 1 |
444 //
445 hwcLayer.transform = HWC_TRANSFORM_FLIP_H;
446 LOGD("Layer rotated 180 degrees");
447 }
448 else {
449 // 180 degree rotation
450 //
451 // | -1 0 |
452 // | 0 -1 |
453 //
454 // Same as horizontal and vertical reflection
455 //
456 // | -1 0 | | 1 0 | = | -1 0 |
457 // | 0 1 | | 0 -1 | | 0 -1 |
458 //
459 hwcLayer.transform = HWC_TRANSFORM_ROT_180;
460 LOGD("Layer rotated 180 degrees");
461 }
462 } else {
463 if (rotation.yy < 0) {
464 // Vertical reflection
465 //
466 // | 1 0 |
467 // | 0 -1 |
468 //
469 hwcLayer.transform = HWC_TRANSFORM_FLIP_V;
470 LOGD("Layer rotated 180 degrees");
471 }
472 else {
473 // No rotation or reflection
474 //
475 // | 1 0 |
476 // | 0 1 |
477 //
478 hwcLayer.transform = 0;
479 }
480 }
482 if (state.YFlipped()) {
483 // Invert vertical reflection flag if it was already set
484 hwcLayer.transform ^= HWC_TRANSFORM_FLIP_V;
485 }
486 hwc_region_t region;
487 if (visibleRegion.GetNumRects() > 1) {
488 mVisibleRegions.push_back(HwcUtils::RectVector());
489 HwcUtils::RectVector* visibleRects = &(mVisibleRegions.back());
490 if(!HwcUtils::PrepareVisibleRegion(visibleRegion,
491 transform * aGLWorldTransform,
492 clip,
493 bufferRect,
494 visibleRects)) {
495 return true;
496 }
497 region.numRects = visibleRects->size();
498 region.rects = &((*visibleRects)[0]);
499 } else {
500 region.numRects = 1;
501 region.rects = &(hwcLayer.displayFrame);
502 }
503 hwcLayer.visibleRegionScreen = region;
504 } else {
505 hwcLayer.flags |= HwcUtils::HWC_COLOR_FILL;
506 ColorLayer* colorLayer = aLayer->AsColorLayer();
507 if (colorLayer->GetColor().a < 1.0) {
508 LOGD("Color layer has semitransparency which is unsupported");
509 return false;
510 }
511 hwcLayer.transform = colorLayer->GetColor().Packed();
512 }
514 mHwcLayerMap.AppendElement(static_cast<LayerComposite*>(aLayer->ImplData()));
515 mList->numHwLayers++;
516 return true;
517 }
520 #if ANDROID_VERSION >= 17
521 bool
522 HwcComposer2D::TryHwComposition()
523 {
524 FramebufferSurface* fbsurface = (FramebufferSurface*)(GetGonkDisplay()->GetFBSurface());
526 if (!(fbsurface && fbsurface->lastHandle)) {
527 LOGD("H/W Composition failed. FBSurface not initialized.");
528 return false;
529 }
531 // Add FB layer
532 int idx = mList->numHwLayers++;
533 if (idx >= mMaxLayerCount) {
534 if (!ReallocLayerList() || idx >= mMaxLayerCount) {
535 LOGE("TryHwComposition failed! Could not add FB layer");
536 return false;
537 }
538 }
540 Prepare(fbsurface->lastHandle, -1);
542 /* Possible composition paths, after hwc prepare:
543 1. GPU Composition
544 2. BLIT Composition
545 3. Full OVERLAY Composition
546 4. Partial OVERLAY Composition (GPU + OVERLAY) */
548 bool gpuComposite = false;
549 bool blitComposite = false;
550 bool overlayComposite = true;
552 for (int j=0; j < idx; j++) {
553 if (mList->hwLayers[j].compositionType == HWC_FRAMEBUFFER ||
554 mList->hwLayers[j].compositionType == HWC_BLIT) {
555 // Full OVERLAY composition is not possible on this frame
556 // It is either GPU / BLIT / partial OVERLAY composition.
557 overlayComposite = false;
558 break;
559 }
560 }
562 if (!overlayComposite) {
563 for (int k=0; k < idx; k++) {
564 switch (mList->hwLayers[k].compositionType) {
565 case HWC_FRAMEBUFFER:
566 gpuComposite = true;
567 break;
568 case HWC_BLIT:
569 blitComposite = true;
570 break;
571 case HWC_OVERLAY:
572 // HWC will compose HWC_OVERLAY layers in partial
573 // Overlay Composition, set layer composition flag
574 // on mapped LayerComposite to skip GPU composition
575 mHwcLayerMap[k]->SetLayerComposited(true);
576 if ((mList->hwLayers[k].hints & HWC_HINT_CLEAR_FB) &&
577 (mList->hwLayers[k].blending == HWC_BLENDING_NONE)) {
578 // Clear visible rect on FB with transparent pixels.
579 hwc_rect_t r = mList->hwLayers[k].displayFrame;
580 mHwcLayerMap[k]->SetClearRect(nsIntRect(r.left, r.top,
581 r.right - r.left,
582 r.bottom - r.top));
583 }
584 break;
585 default:
586 break;
587 }
588 }
590 if (gpuComposite) {
591 // GPU or partial OVERLAY Composition
592 return false;
593 } else if (blitComposite) {
594 // BLIT Composition, flip FB target
595 GetGonkDisplay()->UpdateFBSurface(mDpy, mSur);
596 FramebufferSurface* fbsurface = (FramebufferSurface*)(GetGonkDisplay()->GetFBSurface());
597 if (!fbsurface) {
598 LOGE("H/W Composition failed. NULL FBSurface.");
599 return false;
600 }
601 mList->hwLayers[idx].handle = fbsurface->lastHandle;
602 mList->hwLayers[idx].acquireFenceFd = fbsurface->GetPrevFBAcquireFd();
603 }
604 }
606 // BLIT or full OVERLAY Composition
607 Commit();
609 GetGonkDisplay()->SetFBReleaseFd(mList->hwLayers[idx].releaseFenceFd);
610 return true;
611 }
613 bool
614 HwcComposer2D::Render(EGLDisplay dpy, EGLSurface sur)
615 {
616 if (!mList) {
617 // After boot, HWC list hasn't been created yet
618 return GetGonkDisplay()->SwapBuffers(dpy, sur);
619 }
621 GetGonkDisplay()->UpdateFBSurface(dpy, sur);
623 FramebufferSurface* fbsurface = (FramebufferSurface*)(GetGonkDisplay()->GetFBSurface());
624 if (!fbsurface) {
625 LOGE("H/W Composition failed. FBSurface not initialized.");
626 return false;
627 }
629 if (mPrepared) {
630 // No mHwc prepare, if already prepared in current draw cycle
631 mList->hwLayers[mList->numHwLayers - 1].handle = fbsurface->lastHandle;
632 mList->hwLayers[mList->numHwLayers - 1].acquireFenceFd = fbsurface->GetPrevFBAcquireFd();
633 } else {
634 mList->flags = HWC_GEOMETRY_CHANGED;
635 mList->numHwLayers = 2;
636 mList->hwLayers[0].hints = 0;
637 mList->hwLayers[0].compositionType = HWC_FRAMEBUFFER;
638 mList->hwLayers[0].flags = HWC_SKIP_LAYER;
639 mList->hwLayers[0].backgroundColor = {0};
640 mList->hwLayers[0].acquireFenceFd = -1;
641 mList->hwLayers[0].releaseFenceFd = -1;
642 mList->hwLayers[0].displayFrame = {0, 0, mScreenRect.width, mScreenRect.height};
643 Prepare(fbsurface->lastHandle, fbsurface->GetPrevFBAcquireFd());
644 }
646 // GPU or partial HWC Composition
647 Commit();
649 GetGonkDisplay()->SetFBReleaseFd(mList->hwLayers[mList->numHwLayers - 1].releaseFenceFd);
650 return true;
651 }
653 void
654 HwcComposer2D::Prepare(buffer_handle_t fbHandle, int fence)
655 {
656 int idx = mList->numHwLayers - 1;
657 const hwc_rect_t r = {0, 0, mScreenRect.width, mScreenRect.height};
658 hwc_display_contents_1_t *displays[HWC_NUM_DISPLAY_TYPES] = { nullptr };
660 displays[HWC_DISPLAY_PRIMARY] = mList;
661 mList->outbufAcquireFenceFd = -1;
662 mList->outbuf = nullptr;
663 mList->retireFenceFd = -1;
665 mList->hwLayers[idx].hints = 0;
666 mList->hwLayers[idx].flags = 0;
667 mList->hwLayers[idx].transform = 0;
668 mList->hwLayers[idx].handle = fbHandle;
669 mList->hwLayers[idx].blending = HWC_BLENDING_PREMULT;
670 mList->hwLayers[idx].compositionType = HWC_FRAMEBUFFER_TARGET;
671 setCrop(&mList->hwLayers[idx], r);
672 mList->hwLayers[idx].displayFrame = r;
673 mList->hwLayers[idx].visibleRegionScreen.numRects = 1;
674 mList->hwLayers[idx].visibleRegionScreen.rects = &mList->hwLayers[idx].displayFrame;
675 mList->hwLayers[idx].acquireFenceFd = fence;
676 mList->hwLayers[idx].releaseFenceFd = -1;
677 #if ANDROID_VERSION >= 18
678 mList->hwLayers[idx].planeAlpha = 0xFF;
679 #endif
680 if (mPrepared) {
681 LOGE("Multiple hwc prepare calls!");
682 }
683 mHwc->prepare(mHwc, HWC_NUM_DISPLAY_TYPES, displays);
684 mPrepared = true;
685 }
687 bool
688 HwcComposer2D::Commit()
689 {
690 hwc_display_contents_1_t *displays[HWC_NUM_DISPLAY_TYPES] = { nullptr };
691 displays[HWC_DISPLAY_PRIMARY] = mList;
693 int err = mHwc->set(mHwc, HWC_NUM_DISPLAY_TYPES, displays);
695 mPrevDisplayFence = mPrevRetireFence;
696 mPrevRetireFence = Fence::NO_FENCE;
698 for (uint32_t j=0; j < (mList->numHwLayers - 1); j++) {
699 if (mList->hwLayers[j].releaseFenceFd >= 0) {
700 int fd = mList->hwLayers[j].releaseFenceFd;
701 mList->hwLayers[j].releaseFenceFd = -1;
702 sp<Fence> fence = new Fence(fd);
704 LayerRenderState state = mHwcLayerMap[j]->GetLayer()->GetRenderState();
705 if (!state.mTexture) {
706 continue;
707 }
708 TextureHostOGL* texture = state.mTexture->AsHostOGL();
709 if (!texture) {
710 continue;
711 }
712 texture->SetReleaseFence(fence);
713 }
714 }
716 if (mList->retireFenceFd >= 0) {
717 mPrevRetireFence = new Fence(mList->retireFenceFd);
718 }
720 mPrepared = false;
721 return !err;
722 }
724 void
725 HwcComposer2D::Reset()
726 {
727 LOGD("hwcomposer is already prepared, reset with null set");
728 hwc_display_contents_1_t *displays[HWC_NUM_DISPLAY_TYPES] = { nullptr };
729 displays[HWC_DISPLAY_PRIMARY] = nullptr;
730 mHwc->set(mHwc, HWC_DISPLAY_PRIMARY, displays);
731 mPrepared = false;
732 }
733 #else
734 bool
735 HwcComposer2D::TryHwComposition()
736 {
737 return !mHwc->set(mHwc, mDpy, mSur, mList);
738 }
740 bool
741 HwcComposer2D::Render(EGLDisplay dpy, EGLSurface sur)
742 {
743 return GetGonkDisplay()->SwapBuffers(dpy, sur);
744 }
746 void
747 HwcComposer2D::Reset()
748 {
749 mPrepared = false;
750 }
751 #endif
753 bool
754 HwcComposer2D::TryRender(Layer* aRoot,
755 const gfx::Matrix& GLWorldTransform,
756 bool aGeometryChanged)
757 {
758 gfxMatrix aGLWorldTransform = ThebesMatrix(GLWorldTransform);
759 if (!aGLWorldTransform.PreservesAxisAlignedRectangles()) {
760 LOGD("Render aborted. World transform has non-square angle rotation");
761 return false;
762 }
764 MOZ_ASSERT(Initialized());
765 if (mList) {
766 setHwcGeometry(aGeometryChanged);
767 mList->numHwLayers = 0;
768 mHwcLayerMap.Clear();
769 }
771 if (mPrepared) {
772 Reset();
773 }
775 // XXX: The clear() below means all rect vectors will be have to be
776 // reallocated. We may want to avoid this if possible
777 mVisibleRegions.clear();
779 MOZ_ASSERT(mHwcLayerMap.IsEmpty());
780 if (!PrepareLayerList(aRoot,
781 mScreenRect,
782 gfxMatrix(),
783 aGLWorldTransform))
784 {
785 LOGD("Render aborted. Nothing was drawn to the screen");
786 return false;
787 }
789 if (!TryHwComposition()) {
790 LOGD("H/W Composition failed");
791 return false;
792 }
794 LOGD("Frame rendered");
795 return true;
796 }
798 } // namespace mozilla
