Refactor the GPU to be object-oriented (#1873)

* Refactor GPU3D to be an object

- Who has two thumbs and is the sworn enemy of global state? This guy!

* Refactor GPU itself to be an object

- Wow, it's used in a lot of places
- Also introduce a new `Melon` namespace for a few classes
- I expect other classes will be moved into `Melon` over time

* Change signature of Renderer3D::SetRenderSettings

- Make it noexcept, and its argument const

* Remove some stray whitespace

1 files changed, 7 insertions, 1 deletions

diff --git a/src/DSi_NDMA.h b/src/DSi_NDMA.h
index e3da93d..732bc9d 100644
--- a/src/DSi_NDMA.h
+++ b/src/DSi_NDMA.h
@@ -22,10 +22,15 @@
 #include "types.h"
 #include "Savestate.h"
 
+namespace Melon
+{
+class GPU;
+}
+
 class DSi_NDMA
 {
 public:
-    DSi_NDMA(u32 cpu, u32 num);
+    DSi_NDMA(u32 cpu, u32 num, Melon::GPU& gpu);
     ~DSi_NDMA();
 
     void Reset();
@@ -73,6 +78,7 @@ public:
     u32 Cnt;
 
 private:
+    Melon::GPU& GPU;
     u32 CPU, Num;
 
     u32 StartMode;