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1 /* | 1 /* |
2 * Copyright 2008 The Android Open Source Project | 2 * Copyright 2008 The Android Open Source Project |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #include "SkCanvas.h" | 8 #include "SkCanvas.h" |
9 #include "SkCanvasPriv.h" | 9 #include "SkCanvasPriv.h" |
10 #include "SkBitmapDevice.h" | 10 #include "SkBitmapDevice.h" |
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601 return rec->fLayer->fDevice; | 601 return rec->fLayer->fDevice; |
602 } | 602 } |
603 | 603 |
604 SkBaseDevice* SkCanvas::getTopDevice(bool updateMatrixClip) const { | 604 SkBaseDevice* SkCanvas::getTopDevice(bool updateMatrixClip) const { |
605 if (updateMatrixClip) { | 605 if (updateMatrixClip) { |
606 const_cast<SkCanvas*>(this)->updateDeviceCMCache(); | 606 const_cast<SkCanvas*>(this)->updateDeviceCMCache(); |
607 } | 607 } |
608 return fMCRec->fTopLayer->fDevice; | 608 return fMCRec->fTopLayer->fDevice; |
609 } | 609 } |
610 | 610 |
611 SkBaseDevice* SkCanvas::setRootDevice(SkBaseDevice* device) { | |
612 // return root device | |
613 SkDeque::F2BIter iter(fMCStack); | |
614 MCRec* rec = (MCRec*)iter.next(); | |
615 SkASSERT(rec && rec->fLayer); | |
616 SkBaseDevice* rootDevice = rec->fLayer->fDevice; | |
617 | |
618 if (rootDevice == device) { | |
619 return device; | |
620 } | |
621 | |
622 if (device) { | |
623 device->onAttachToCanvas(this); | |
624 device->initForRootLayer(fProps.pixelGeometry()); | |
625 } | |
626 if (rootDevice) { | |
627 rootDevice->onDetachFromCanvas(); | |
628 } | |
629 | |
630 SkRefCnt_SafeAssign(rec->fLayer->fDevice, device); | |
631 rootDevice = device; | |
632 | |
633 fDeviceCMDirty = true; | |
634 | |
635 /* Now we update our initial region to have the bounds of the new device, | |
636 and then intersect all of the clips in our stack with these bounds, | |
637 to ensure that we can't draw outside of the device's bounds (and trash | |
638 memory). | |
639 | |
640 NOTE: this is only a partial-fix, since if the new device is larger than | |
641 the previous one, we don't know how to "enlarge" the clips in our stack, | |
642 so drawing may be artificially restricted. Without keeping a history of | |
643 all calls to canvas->clipRect() and canvas->clipPath(), we can't exactly | |
644 reconstruct the correct clips, so this approximation will have to do. | |
645 The caller really needs to restore() back to the base if they want to | |
646 accurately take advantage of the new device bounds. | |
647 */ | |
648 | |
649 SkIRect bounds; | |
650 if (device) { | |
651 bounds.set(0, 0, device->width(), device->height()); | |
652 } else { | |
653 bounds.setEmpty(); | |
654 } | |
655 // now jam our 1st clip to be bounds, and intersect the rest with that | |
656 rec->fRasterClip.setRect(bounds); | |
657 while ((rec = (MCRec*)iter.next()) != NULL) { | |
658 (void)rec->fRasterClip.op(bounds, SkRegion::kIntersect_Op); | |
659 } | |
660 | |
661 return device; | |
662 } | |
663 | |
664 bool SkCanvas::readPixels(SkBitmap* bitmap, int x, int y) { | 611 bool SkCanvas::readPixels(SkBitmap* bitmap, int x, int y) { |
665 if (kUnknown_SkColorType == bitmap->colorType() || bitmap->getTexture()) { | 612 if (kUnknown_SkColorType == bitmap->colorType() || bitmap->getTexture()) { |
666 return false; | 613 return false; |
667 } | 614 } |
668 | 615 |
669 bool weAllocated = false; | 616 bool weAllocated = false; |
670 if (NULL == bitmap->pixelRef()) { | 617 if (NULL == bitmap->pixelRef()) { |
671 if (!bitmap->tryAllocPixels()) { | 618 if (!bitmap->tryAllocPixels()) { |
672 return false; | 619 return false; |
673 } | 620 } |
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2564 } | 2511 } |
2565 | 2512 |
2566 if (matrix) { | 2513 if (matrix) { |
2567 canvas->concat(*matrix); | 2514 canvas->concat(*matrix); |
2568 } | 2515 } |
2569 } | 2516 } |
2570 | 2517 |
2571 SkAutoCanvasMatrixPaint::~SkAutoCanvasMatrixPaint() { | 2518 SkAutoCanvasMatrixPaint::~SkAutoCanvasMatrixPaint() { |
2572 fCanvas->restoreToCount(fSaveCount); | 2519 fCanvas->restoreToCount(fSaveCount); |
2573 } | 2520 } |
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