ms: add color emulation for non-linear blue

ares-emulator · Oct 24, 2023 · f1fb33a · f1fb33a
1 parent 84e3663
commit f1fb33a
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Showing 3 changed files with 12 additions and 0 deletions.
diff --git a/ares/ms/vdp/color.cpp b/ares/ms/vdp/color.cpp
@@ -7,6 +7,12 @@ auto VDP::colorMasterSystem(n32 color) -> n64 {
   n64 g = image::normalize(G, 2, 16);
   n64 b = image::normalize(B, 2, 16);
 
+  //master system has non-linear blue output
+  if(colorEmulation->value()) {
+    u8 values[4] = {0, 104, 170, 255};
+    b = image::normalize(values[B], 8, 16);
+  }
+
   return r << 32 | g << 16 | b << 0;
 }
 

diff --git a/ares/ms/vdp/vdp.cpp b/ares/ms/vdp/vdp.cpp
@@ -36,6 +36,11 @@ auto VDP::load(Node::Object parent) -> void {
       if(value == 1) screen->setSize(256, 240);
     });
     overscan->setDynamic(true);
+
+    colorEmulation = screen->append<Node::Setting::Boolean>("Color Emulation", true, [&](auto value) {
+      screen->resetPalette();
+    });
+    colorEmulation->setDynamic(true);
   }
 
   if(Display::LCD()) {

diff --git a/ares/ms/vdp/vdp.hpp b/ares/ms/vdp/vdp.hpp
@@ -6,6 +6,7 @@ struct VDP : Thread {
   Node::Object node;
   Node::Video::Screen screen;
   Node::Setting::Boolean overscan;
+  Node::Setting::Boolean colorEmulation;
   Node::Setting::Natural revision;
   Node::Setting::Boolean interframeBlending;  //Game Gear only
   Memory::Writable<n8 > vram;  //16KB