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!

---
 threading.cpp | 97 +++++++++++++++++++++++++++++++++++++----------------------
 1 file changed, 61 insertions(+), 36 deletions(-)

(limited to 'threading.cpp')

diff --git a/threading.cpp b/threading.cpp
index ff891a6..84e5463 100644
--- a/threading.cpp
+++ b/threading.cpp
@@ -1,58 +1,83 @@
-
-static int
-MainRenderer(void *ptr)
-{
-    for(;;)
-    {
-        SDL_SemWait(Semaphore);
-    }
-}
-
-#if 0
 static void
-PushRect(rectangle RenderRegion)
-{
-    uint32 Q = SDL_AtomicGet(&QueuedEntries);
-    render_entry *Entry = Entries + Q;
-    Entry->RenderRegion = RenderRegion;
-    SDL_AtomicAdd(&QueuedEntries, 1);
-    SDL_SemPost(Semaphore);
-}
-
-static void
-RenderLayers(render_queue *RenderInfo, rectangle RenderRegion);
+RenderLayers(render_entry Entry);
 
 static bool32
-CheckQueue(render_queue RenderInfo, uint16 Index)
+CheckQueue(uint16 Index)
 {
     bool32 Result = 0;
     uint32 Q = SDL_AtomicGet(&QueuedEntries);
     uint32 C = SDL_AtomicGet(&CurrentEntry);
     if (Q > C)
-        {
-            if (SDL_AtomicCAS(&CurrentEntry, C, C + 1)) {
-                render_entry *Entry = Entries + C;
-                Assert(Entry->RenderRegion.Max.x != 0);
-                RenderLayers(&RenderInfo, Entry->RenderRegion);
-                // printf("(FINISHED) Thread %i, region X%i Y%i\n", Index, Entry->RenderRegion.Min.x/240, Entry->RenderRegion.Min.y/135);
-                SDL_AtomicAdd(&CompletedEntries, 1);
-                Result = 1;
-            }
+    {
+        if (SDL_AtomicCAS(&CurrentEntry, C, C + 1)) {
+            // printf("C: %i START: F%i Thread %i, region X%i Y%i\n", C, Entry->FrameNumber, Index, Entry->RenderRegion.Min.x, Entry->RenderRegion.Min.y);
+            RenderLayers(Entries[C]);
+            // printf("END: F%i Thread %i, region X%i Y%i\n", Entry->FrameNumber, Index, Entry->RenderRegion.Min.x, Entry->RenderRegion.Min.y);
+            SDL_AtomicAdd(&CompletedEntries, 1);
+            Result = 1;
         }
+    }
     return Result;
 }
 
 static int
 TestThread(void *ptr)
 {
-    thread_info *ThreadInfo = (thread_info *)ptr;
-    uint16 Index = ThreadInfo->Index;
+    uint16 Index = *(uint16 *)ptr;
     for(;;)
     {
-        if (!CheckQueue(*ThreadInfo->RenderInfo, Index))
+        if (!CheckQueue(Index))
         {
             SDL_SemWait(Semaphore);
         }
     }
 }
-#endif
+
+static bool32
+Threading_IsActive()
+{
+    uint32 C = SDL_AtomicGet(&CompletedEntries);
+    Assert(C < 17);
+    return (C == 16) ? false : true;
+}
+
+static void
+Threading_BitmapOp(void *Data, void *OutputBuffer, rectangle InitialRenderRegion)
+{
+    uint16 TileWidth = (InitialRenderRegion.Max.x - InitialRenderRegion.Min.x) / 4;
+    uint16 TileHeight = (InitialRenderRegion.Max.y - InitialRenderRegion.Min.y) / 4;
+
+    SDL_AtomicSet(&QueuedEntries, 0);
+    SDL_AtomicSet(&CurrentEntry, 0);
+    SDL_AtomicSet(&CompletedEntries, 0);
+
+    for (int y = 0; y < 4; y++) {
+        for (int x = 0; x < 4; x++) {
+            // if (x == y) {
+                rectangle RenderRegion = { TileWidth*x, TileHeight*y, TileWidth + TileWidth*x, TileHeight + TileHeight*y };
+
+                RenderRegion.Min.x -= RenderRegion.Min.x % 8;
+                RenderRegion.Min.y -= RenderRegion.Min.y % 8;
+                RenderRegion.Max.x -= RenderRegion.Max.x % 8;
+                RenderRegion.Max.y -= RenderRegion.Max.y % 8;
+
+                if (RenderRegion.Max.x > InitialRenderRegion.Max.x)
+                    RenderRegion.Max.x = InitialRenderRegion.Max.x;
+                if (RenderRegion.Max.y > InitialRenderRegion.Max.y)
+                    RenderRegion.Max.y = InitialRenderRegion.Max.y;
+
+                if (x == 3)
+                    RenderRegion.Max.x = InitialRenderRegion.Max.x;
+                if (y == 3)
+                    RenderRegion.Max.y = InitialRenderRegion.Max.y;
+
+                render_entry Entry = { Data, OutputBuffer, RenderRegion };
+
+                uint32 Q = SDL_AtomicGet(&QueuedEntries);
+                *(Entries + Q) = Entry;
+                SDL_AtomicAdd(&QueuedEntries, 1);
+                SDL_SemPost(Semaphore);
+            }
+        // }
+    }
+}
-- 
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