static void UpdateOrAllocate(ref MeshHandle data, int vertexCount, int indexCount, UIRenderDevice device, out NativeSlice <Vertex> verts, out NativeSlice <UInt16> indices, out UInt16 indexOffset, ref ChainBuilderStats stats)
{
if (data != null)
{
// Try to fit within the existing allocation, optionally we can change the condition
// to be an exact match of size to guarantee continuity in draw ranges
if (data.allocVerts.size >= vertexCount && data.allocIndices.size >= indexCount)
{
device.Update(data, (uint)vertexCount, (uint)indexCount, out verts, out indices, out indexOffset);
stats.updatedMeshAllocations++;
}
else
{
// Won't fit in the existing allocated region, free the current one
device.Free(data);
data = device.Allocate((uint)vertexCount, (uint)indexCount, out verts, out indices, out indexOffset);
stats.newMeshAllocations++;
}
}
else
{
data = device.Allocate((uint)vertexCount, (uint)indexCount, out verts, out indices, out indexOffset);
stats.newMeshAllocations++;
}
}
static unsafe void PrepareNudgeVertices(VisualElement ve, UIRenderDevice device, MeshHandle mesh, out IntPtr src, out IntPtr dst, out int count)
{
int vertCount = (int)mesh.allocVerts.size;
NativeSlice <Vertex> oldVerts = mesh.allocPage.vertices.cpuData.Slice((int)mesh.allocVerts.start, vertCount);
NativeSlice <Vertex> newVerts;
device.Update(mesh, (uint)vertCount, out newVerts);
src = (IntPtr)oldVerts.GetUnsafePtr();
dst = (IntPtr)newVerts.GetUnsafePtr();
count = vertCount;
}
public void Begin(VisualElement ve, UIRenderDevice device)
{
Debug.Assert(ve.renderChainData.usesLegacyText && ve.renderChainData.textEntries.Count > 0);
this.m_CurrentElement = ve;
this.m_TextEntryIndex = 0;
Alloc allocVerts = ve.renderChainData.data.allocVerts;
NativeSlice <Vertex> slice = ve.renderChainData.data.allocPage.vertices.cpuData.Slice((int)allocVerts.start, (int)allocVerts.size);
device.Update(ve.renderChainData.data, ve.renderChainData.data.allocVerts.size, out this.m_MeshDataVerts);
RenderChainTextEntry renderChainTextEntry = ve.renderChainData.textEntries[0];
bool flag = ve.renderChainData.textEntries.Count > 1 || renderChainTextEntry.vertexCount != this.m_MeshDataVerts.Length;
if (flag)
{
this.m_MeshDataVerts.CopyFrom(slice);
}
int firstVertex = renderChainTextEntry.firstVertex;
this.m_XFormClipPages = slice[firstVertex].xformClipPages;
this.m_IDsFlags = slice[firstVertex].idsFlags;
this.m_OpacityPagesSettingsIndex = slice[firstVertex].opacityPageSVGSettingIndex;
}