diff options
Diffstat (limited to 'chromium/third_party/skia/src/images/SkImageRef_ashmem.cpp')
| -rw-r--r-- | chromium/third_party/skia/src/images/SkImageRef_ashmem.cpp | 233 |
1 files changed, 0 insertions, 233 deletions
diff --git a/chromium/third_party/skia/src/images/SkImageRef_ashmem.cpp b/chromium/third_party/skia/src/images/SkImageRef_ashmem.cpp deleted file mode 100644 index 269199faf84..00000000000 --- a/chromium/third_party/skia/src/images/SkImageRef_ashmem.cpp +++ /dev/null @@ -1,233 +0,0 @@ -/* - * Copyright 2011 Google Inc. - * - * Use of this source code is governed by a BSD-style license that can be - * found in the LICENSE file. - */ - -#include "SkImageRef_ashmem.h" -#include "SkImageDecoder.h" -#include "SkFlattenableBuffers.h" -#include "SkThread.h" - -#include "android/ashmem.h" - -#include <sys/mman.h> -#include <unistd.h> - -//#define TRACE_ASH_PURGE // just trace purges - -#ifdef DUMP_IMAGEREF_LIFECYCLE - #define DUMP_ASHMEM_LIFECYCLE -#else -// #define DUMP_ASHMEM_LIFECYCLE -#endif - -// ashmem likes lengths on page boundaries -static size_t roundToPageSize(size_t size) { - const size_t mask = getpagesize() - 1; - size_t newsize = (size + mask) & ~mask; -// SkDebugf("---- oldsize %d newsize %d\n", size, newsize); - return newsize; -} - -SkImageRef_ashmem::SkImageRef_ashmem(const SkImageInfo& info, - SkStreamRewindable* stream, - int sampleSize) - : SkImageRef(info, stream, sampleSize) -{ - fRec.fFD = -1; - fRec.fAddr = NULL; - fRec.fSize = 0; - fRec.fPinned = false; - - fCT = NULL; -} - -SkImageRef_ashmem::~SkImageRef_ashmem() { - SkSafeUnref(fCT); - this->closeFD(); -} - -void SkImageRef_ashmem::closeFD() { - if (-1 != fRec.fFD) { -#ifdef DUMP_ASHMEM_LIFECYCLE - SkDebugf("=== ashmem close %d\n", fRec.fFD); -#endif - SkASSERT(fRec.fAddr); - SkASSERT(fRec.fSize); - munmap(fRec.fAddr, fRec.fSize); - close(fRec.fFD); - fRec.fFD = -1; - } -} - -/////////////////////////////////////////////////////////////////////////////// - -class AshmemAllocator : public SkBitmap::Allocator { -public: - AshmemAllocator(SkAshmemRec* rec, const char name[]) - : fRec(rec), fName(name) {} - - virtual bool allocPixelRef(SkBitmap* bm, SkColorTable* ct) { - const size_t size = roundToPageSize(bm->getSize()); - int fd = fRec->fFD; - void* addr = fRec->fAddr; - - SkASSERT(!fRec->fPinned); - - if (-1 == fd) { - SkASSERT(NULL == addr); - SkASSERT(0 == fRec->fSize); - - fd = ashmem_create_region(fName, size); -#ifdef DUMP_ASHMEM_LIFECYCLE - SkDebugf("=== ashmem_create_region %s size=%d fd=%d\n", fName, size, fd); -#endif - if (-1 == fd) { - SkDebugf("------- imageref_ashmem create failed <%s> %d\n", - fName, size); - return false; - } - - int err = ashmem_set_prot_region(fd, PROT_READ | PROT_WRITE); - if (err) { - SkDebugf("------ ashmem_set_prot_region(%d) failed %d\n", - fd, err); - close(fd); - return false; - } - - addr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0); - if (-1 == (long)addr) { - SkDebugf("---------- mmap failed for imageref_ashmem size=%d\n", - size); - close(fd); - return false; - } - - fRec->fFD = fd; - fRec->fAddr = addr; - fRec->fSize = size; - } else { - SkASSERT(addr); - SkASSERT(size == fRec->fSize); - (void)ashmem_pin_region(fd, 0, 0); - } - - bm->setPixels(addr, ct); - fRec->fPinned = true; - return true; - } - -private: - // we just point to our caller's memory, these are not copies - SkAshmemRec* fRec; - const char* fName; -}; - -bool SkImageRef_ashmem::onDecode(SkImageDecoder* codec, SkStreamRewindable* stream, - SkBitmap* bitmap, SkBitmap::Config config, - SkImageDecoder::Mode mode) { - - if (SkImageDecoder::kDecodeBounds_Mode == mode) { - return this->INHERITED::onDecode(codec, stream, bitmap, config, mode); - } - - // Ashmem memory is guaranteed to be initialized to 0. - codec->setSkipWritingZeroes(true); - - AshmemAllocator alloc(&fRec, this->getURI()); - - codec->setAllocator(&alloc); - bool success = this->INHERITED::onDecode(codec, stream, bitmap, config, - mode); - // remove the allocator, since its on the stack - codec->setAllocator(NULL); - - if (success) { - // remember the colortable (if any) - SkRefCnt_SafeAssign(fCT, bitmap->getColorTable()); - return true; - } else { - if (fRec.fPinned) { - ashmem_unpin_region(fRec.fFD, 0, 0); - fRec.fPinned = false; - } - this->closeFD(); - return false; - } -} - -void* SkImageRef_ashmem::onLockPixels(SkColorTable** ct) { - SkASSERT(fBitmap.getPixels() == NULL); - SkASSERT(fBitmap.getColorTable() == NULL); - - // fast case: check if we can just pin and get the cached data - if (-1 != fRec.fFD) { - SkASSERT(fRec.fAddr); - SkASSERT(!fRec.fPinned); - int pin = ashmem_pin_region(fRec.fFD, 0, 0); - - if (ASHMEM_NOT_PURGED == pin) { // yea, fast case! - fBitmap.setPixels(fRec.fAddr, fCT); - fRec.fPinned = true; - } else if (ASHMEM_WAS_PURGED == pin) { - ashmem_unpin_region(fRec.fFD, 0, 0); - // let go of our colortable if we lost the pixels. Well get it back - // again when we re-decode - if (fCT) { - fCT->unref(); - fCT = NULL; - } -#if defined(DUMP_ASHMEM_LIFECYCLE) || defined(TRACE_ASH_PURGE) - SkDebugf("===== ashmem purged %d\n", fBitmap.getSize()); -#endif - } else { - SkDebugf("===== ashmem pin_region(%d) returned %d\n", fRec.fFD, pin); - // return null result for failure - if (ct) { - *ct = NULL; - } - return NULL; - } - } else { - // no FD, will create an ashmem region in allocator - } - - return this->INHERITED::onLockPixels(ct); -} - -void SkImageRef_ashmem::onUnlockPixels() { - this->INHERITED::onUnlockPixels(); - - if (-1 != fRec.fFD) { - SkASSERT(fRec.fAddr); - SkASSERT(fRec.fPinned); - - ashmem_unpin_region(fRec.fFD, 0, 0); - fRec.fPinned = false; - } - - // we clear this with or without an error, since we've either closed or - // unpinned the region - fBitmap.setPixels(NULL, NULL); -} - -void SkImageRef_ashmem::flatten(SkFlattenableWriteBuffer& buffer) const { - this->INHERITED::flatten(buffer); - buffer.writeString(getURI()); -} - -SkImageRef_ashmem::SkImageRef_ashmem(SkFlattenableReadBuffer& buffer) - : INHERITED(buffer) { - fRec.fFD = -1; - fRec.fAddr = NULL; - fRec.fSize = 0; - fRec.fPinned = false; - fCT = NULL; - - SkString uri; - buffer.readString(&uri); - this->setURI(uri); -} |