From 84d31c7783f385646a1319e993bdbbf36285501e Mon Sep 17 00:00:00 2001
From: Milang <milan.garnier@orange.fr>
Date: Sat, 17 Aug 2019 17:47:05 +0200
Subject: [PATCH] add DMA >> experimental

---
 src/FxEngine/zbuffer.c | 70 +++++++++++++++++++++++-------------------
 1 file changed, 39 insertions(+), 31 deletions(-)

diff --git a/src/FxEngine/zbuffer.c b/src/FxEngine/zbuffer.c
index 0f358a7..ea9bc88 100644
--- a/src/FxEngine/zbuffer.c
+++ b/src/FxEngine/zbuffer.c
@@ -6,6 +6,7 @@
 #include <gint/std/stdio.h>
 #include <gint/std/stdlib.h>
 #include <gint/keyboard.h>
+#include <gint/dma.h>
 
 /** size_uint32
  * taille du zbuffer exprimée en uint32_t
@@ -24,41 +25,48 @@ static const uint32_t size_char = size_uint32*sizeof(int32_t);
 **/
 static int32_t* address=0;
 
+const int32_t clearval=3000;
+
 void FE_zbuffer_clear()
 {
-	if (address==0)
-	{
-		address = malloc(size_char);
-		if (address==0) // cas de figure où il n'y a plus assez de RAM
-		{
-			dclear(C_WHITE);
-			dtext(1, 1, "Not enough RAM...", C_BLACK, C_NONE);
-			dupdate();
-			while (1==1)
-				getkey();
-		}
-	}
-	// TODO déterminer le type d'effacement
-	
-	// effacement fait par le CPU
-	uint32_t indice;
-	for (indice = 0; indice < size_uint32; indice ++)
-		address[indice] = 3000;
-	
-	// effacement fait par le DMA
-	// TODO
+    if (address==0)
+    {
+        address = malloc(size_char);
+        if (address==0) // cas de figure où il n'y a plus assez de RAM
+        {
+            dclear(C_WHITE);
+            dtext(1, 1, "Not enough RAM...", C_BLACK, C_NONE);
+            dupdate();
+            while (1==1)
+                getkey();
+        }
+    }
+    // TODO déterminer le type d'effacement
+    if (isSH3())
+    { // effacement fait par le CPU
+        uint32_t indice;
+        for (indice = 0; indice < size_uint32; indice ++)
+            address[indice] = clearval;
+    }
+    else
+    { // effacement fait par le DMA
+        dma_transfer(0, DMA_32B, size_uint32, &clearval, DMA_FIXED,
+        address, DMA_INC);
+    }
+    
+
 }
 
 bool FE_zbuffer_set_dist(int32_t x, int32_t y, int32_t dist)
 {
-	x %= FE_ZB_SIZE_X;
-	y %= FE_ZB_SIZE_Y;
-	const uint32_t indice = x * 64 + y;
-	if (address[indice]>dist && dist>0)
-	{
-		address[indice] = dist;
-		return true;
-	}
-	else
-		return false;
+    x %= FE_ZB_SIZE_X;
+    y %= FE_ZB_SIZE_Y;
+    const uint32_t indice = x * 64 + y;
+    if (address[indice]>dist && dist>0)
+    {
+        address[indice] = dist;
+        return true;
+    }
+    else
+        return false;
 }