From 7804c6a96d26c2e757d09f1864eb73fb81eb280f Mon Sep 17 00:00:00 2001
From: Fox Caminiti <fox@foxcam.net>
Date: Thu, 20 Oct 2022 20:45:37 -0400
Subject: precomp recursion!

---
 memory.cpp | 93 +++++++++++++++++++++++++++++++++++++++++++++++++++++++-------
 1 file changed, 83 insertions(+), 10 deletions(-)

(limited to 'memory.cpp')

diff --git a/memory.cpp b/memory.cpp
index f502eb2..1dd7ae6 100644
--- a/memory.cpp
+++ b/memory.cpp
@@ -8,15 +8,6 @@ Memory_InitTable(global_memory *GlobalMemory, memory *Memory, uint64 Size, memor
     GlobalMemory->CurrentPosition += Size;
 }
 
-void Memory_Zero(uint8 *Address_Write, uint64 Size)
-{
-    uint64 i = 0;
-    while (i < Size) {
-        *(Address_Write + i) = 0;
-        i++;
-    }
-}
-
 static uint32
 Memory_Block_AllocateNew(memory *Memory, memory_table_list TableName)
 {
@@ -29,7 +20,7 @@ Memory_Block_AllocateNew(memory *Memory, memory_table_list TableName)
         Address_Playhead += Table->Block_ElementSize;
         Index++;
     }
-    Memory_Zero(Address_Playhead, Table->Block_ElementSize);
+    Arbitrary_Zero(Address_Playhead, Table->Block_ElementSize);
 
     return Index;
 }
@@ -50,6 +41,88 @@ Memory_Block_AllocateAddress(memory *Memory, memory_table_list TableName)
     return Memory_Block_AddressAtIndex(Memory, TableName, FileIndex);
 }
 
+static uint32
+Memory_Block_Bitmap_AllocateNew(project_state *State, memory *Memory, cache_entry Entry, uint64 NewSize)
+{
+    uint32 LastVal = 0;
+    uint32 LastBlock = 0;
+    uint32 c = 0;
+    cache_entry *EntryArray = State->Render.Entry;
+    while (EntryArray[c].IsOccupied != 0) {
+        if (EntryArray[c].Block_StartIndex > LastBlock) {
+            LastBlock = EntryArray[c].Block_StartIndex;
+            LastVal = c;
+        }
+        c++;
+    }
+    cache_entry LastEntry = EntryArray[LastVal];
+    uint32 LastEntry_BlockCount = 0;
+    switch (EntryArray[LastVal].Type) {
+        case cache_entry_type_comp:
+        {
+            block_composition Comp = *(block_composition *)Memory_Block_AddressAtIndex(Memory, F_Precomps, LastEntry.TypeInfo);
+            uint64 Size = Comp.Width * Comp.Height * Comp.BytesPerPixel;
+            LastEntry_BlockCount = (Size / BitmapBlockSize) + 1;
+        } break;
+        case cache_entry_type_source:
+        {
+            block_source Source = *(block_source *)Memory_Block_AddressAtIndex(Memory, F_Sources, LastEntry.TypeInfo);
+            uint64 Size = Source.Width * Source.Height * Source.BytesPerPixel;
+            LastEntry_BlockCount = (Size / BitmapBlockSize) + 1;
+        } break;
+        case cache_entry_type_layer:
+        {
+            Assert(0);
+        } break;
+        case cache_entry_type_assert:
+        {
+            Assert(0);
+        } break;
+        default:
+        {
+            Assert(0);
+        } break;
+    }
+
+    return LastBlock + LastEntry_BlockCount;
+
+    /*
+    uint32 Blocks_Needed = (NewSize / BitmapBlockSize) + 1;
+    uint32 Blocks_Max = Memory->Slot[B_CachedBitmaps].Size / BitmapBlockSize;
+    uint32 Block_Index_Available = 0;
+    */
+
+}
+
+static cache_entry *
+Memory_Cache_Search(project_state *State, memory *Memory, cache_entry *EntryArray, cache_entry_type Type, uint32 TypeInfo, uint32 TypeInfo_Sub)
+{
+    int c = 0;
+    while (EntryArray[c].IsOccupied != 0) {
+        if (EntryArray[c].Type == Type &&
+            EntryArray[c].TypeInfo == TypeInfo &&
+            EntryArray[c].TypeInfo_Sub == TypeInfo_Sub) {
+            return &EntryArray[c];
+        }
+        c++;
+    }
+    if (c != 0)
+        EntryArray[c].Block_StartIndex = Memory_Block_Bitmap_AllocateNew(State, Memory, EntryArray[c], 0);
+    EntryArray[c].IsOccupied = true;
+    EntryArray[c].Type = Type;
+    EntryArray[c].TypeInfo = TypeInfo;
+    EntryArray[c].TypeInfo_Sub = TypeInfo_Sub;
+    return &EntryArray[c];
+}
+
+static void *
+Memory_Block_Bitmap_AddressAtIndex(memory *Memory, uint32 Index)
+{
+    memory_table *Table = &Memory->Slot[B_CachedBitmaps];
+    uint8 *Address = (uint8 *)Table->Address + Index*BitmapBlockSize;
+    return (void *)Address;
+}
+
 static void *
 Memory_PushScratch(memory *Memory, uint64 Size) {
     memory_table *Table = &Memory->Slot[B_ScratchSpace];
-- 
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