GrGLuint GrGLPathRendering::genPaths(GrGLsizei range) {
if (range > 1) {
GrGLuint name;
GL_CALL_RET(name, GenPaths(range));
return name;
}
if (NULL == fPathNameAllocator.get()) {
static const int range = 65536;
GrGLuint firstName;
GL_CALL_RET(firstName, GenPaths(range));
fPathNameAllocator.reset(SkNEW_ARGS(GrGLNameAllocator, (firstName, firstName + range)));
}
// When allocating names one at a time, pull from a client-side pool of
// available names in order to save a round trip to the GL server.
GrGLuint name = fPathNameAllocator->allocateName();
if (0 == name) {
// Our reserved path names are all in use. Fall back on GenPaths.
GL_CALL_RET(name, GenPaths(1));
}
return name;
}
GrGLuint GrGLPathRendering::genPaths(GrGLsizei range) {
SkASSERT(range > 0);
GrGLuint firstID;
if (fPreallocatedPathCount >= range) {
firstID = fFirstPreallocatedPathID;
fPreallocatedPathCount -= range;
fFirstPreallocatedPathID += range;
return firstID;
}
// Allocate range + the amount to fill up preallocation amount. If succeed, either join with
// the existing preallocation range or delete the existing and use the new (potentially partial)
// preallocation range.
GrGLsizei allocAmount = range + (kPathIDPreallocationAmount - fPreallocatedPathCount);
if (allocAmount >= range) {
GL_CALL_RET(firstID, GenPaths(allocAmount));
if (firstID != 0) {
if (fPreallocatedPathCount > 0 &&
firstID == fFirstPreallocatedPathID + fPreallocatedPathCount) {
firstID = fFirstPreallocatedPathID;
fPreallocatedPathCount += allocAmount - range;
fFirstPreallocatedPathID += range;
return firstID;
}
if (allocAmount > range) {
if (fPreallocatedPathCount > 0) {
this->deletePaths(fFirstPreallocatedPathID, fPreallocatedPathCount);
}
fFirstPreallocatedPathID = firstID + range;
fPreallocatedPathCount = allocAmount - range;
}
// Special case: if allocAmount == range, we have full preallocated range.
return firstID;
}
}
// Failed to allocate with preallocation. Remove existing preallocation and try to allocate just
// the range.
if (fPreallocatedPathCount > 0) {
this->deletePaths(fFirstPreallocatedPathID, fPreallocatedPathCount);
fPreallocatedPathCount = 0;
}
GL_CALL_RET(firstID, GenPaths(range));
if (firstID == 0) {
SkDebugf("Warning: Failed to allocate path\n");
}
return firstID;
}
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();
}
