Refactor implementation constants.

Bug 19353282

Change-Id: If2eb9f2d78c3a44b720bb1f223711411b576d710
Reviewed-on: https://swiftshader-review.googlesource.com/5140
Reviewed-by: Alexis Hétu <sugoi@google.com>
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
diff --git a/src/D3D9/Direct3DVolumeTexture9.cpp b/src/D3D9/Direct3DVolumeTexture9.cpp
index 5633cc1..fff5288 100644
--- a/src/D3D9/Direct3DVolumeTexture9.cpp
+++ b/src/D3D9/Direct3DVolumeTexture9.cpp
@@ -27,7 +27,7 @@
 			this->levels = sw::log2(sw::max((int)width, (int)height, (int)depth, 1)) + 1;
 		}
 
-		for(unsigned int level = 0; level < MIPMAP_LEVELS; level++)
+		for(unsigned int level = 0; level < sw::MIPMAP_LEVELS; level++)
 		{
 			if(level < this->levels)
 			{
@@ -49,7 +49,7 @@
 	{
 		resource->lock(sw::DESTRUCT);
 
-		for(int level = 0; level < MIPMAP_LEVELS; level++)
+		for(int level = 0; level < sw::MIPMAP_LEVELS; level++)
 		{
 			if(volumeLevel[level])
 			{