void GrMemoryPool::release(void* p) {
VALIDATE;
intptr_t ptr = reinterpret_cast<intptr_t>(p) - kPerAllocPad;
BlockHeader* block = *reinterpret_cast<BlockHeader**>(ptr);
if (1 == block->fLiveCount) {
// the head block is special, it is reset rather than deleted
if (fHead == block) {
fHead->fCurrPtr = reinterpret_cast<intptr_t>(fHead) +
kHeaderSize;
fHead->fLiveCount = 0;
fHead->fFreeSize = fPreallocSize;
} else {
BlockHeader* prev = block->fPrev;
BlockHeader* next = block->fNext;
GrAssert(prev);
prev->fNext = next;
if (next) {
next->fPrev = prev;
} else {
GrAssert(fTail == block);
fTail = prev;
}
DeleteBlock(block);
}
} else {
--block->fLiveCount;
}
GR_DEBUGCODE(--fAllocationCnt);
VALIDATE;
}
void* GrMemoryPool::allocate(size_t size) {
VALIDATE;
size = GrSizeAlignUp(size, kAlignment);
size += kPerAllocPad;
if (fTail->fFreeSize < size) {
int blockSize = size;
blockSize = GrMax<size_t>(blockSize, fMinAllocSize);
BlockHeader* block = CreateBlock(blockSize);
block->fPrev = fTail;
block->fNext = NULL;
GrAssert(NULL == fTail->fNext);
fTail->fNext = block;
fTail = block;
}
GrAssert(fTail->fFreeSize >= size);
intptr_t ptr = fTail->fCurrPtr;
// We stash a pointer to the block header, just before the allocated space,
// so that we can decrement the live count on delete in constant time.
*reinterpret_cast<BlockHeader**>(ptr) = fTail;
ptr += kPerAllocPad;
fTail->fCurrPtr += size;
fTail->fFreeSize -= size;
fTail->fLiveCount += 1;
GR_DEBUGCODE(++fAllocationCnt);
VALIDATE;
return reinterpret_cast<void*>(ptr);
}
GrGLPath::GrGLPath(GrGpuGL* gpu, const SkPath& path) : INHERITED(gpu, kIsWrapped) {
#ifndef SK_SCALAR_IS_FLOAT
GrCrash("Assumes scalar is float.");
#endif
SkASSERT(!path.isEmpty());
GL_CALL_RET(fPathID, GenPaths(1));
SkSTArray<16, GrGLubyte, true> pathCommands;
SkSTArray<16, SkPoint, true> pathPoints;
int verbCnt = path.countVerbs();
int pointCnt = path.countPoints();
pathCommands.resize_back(verbCnt);
pathPoints.resize_back(pointCnt);
// TODO: Direct access to path points since we could pass them on directly.
path.getPoints(&pathPoints[0], pointCnt);
path.getVerbs(&pathCommands[0], verbCnt);
GR_DEBUGCODE(int numPts = 0);
for (int i = 0; i < verbCnt; ++i) {
SkPath::Verb v = static_cast<SkPath::Verb>(pathCommands[i]);
pathCommands[i] = verb_to_gl_path_cmd(v);
GR_DEBUGCODE(numPts += num_pts(v));
}
GrAssert(pathPoints.count() == numPts);
GL_CALL(PathCommands(fPathID,
verbCnt, &pathCommands[0],
2 * pointCnt, GR_GL_FLOAT, &pathPoints[0]));
fBounds = path.getBounds();
}
GrMemoryPool::GrMemoryPool(size_t preallocSize, size_t minAllocSize) {
GR_DEBUGCODE(fAllocationCnt = 0);
minAllocSize = GrMax<size_t>(minAllocSize, 1 << 10);
fMinAllocSize = GrSizeAlignUp(minAllocSize + kPerAllocPad, kAlignment),
fPreallocSize = GrSizeAlignUp(preallocSize + kPerAllocPad, kAlignment);
fPreallocSize = GrMax(fPreallocSize, fMinAllocSize);
fHead = CreateBlock(fPreallocSize);
fTail = fHead;
fHead->fNext = NULL;
fHead->fPrev = NULL;
VALIDATE;
};
