Add support for the partial palette on the lives remaining screen.

1. Allow short palettes.
2. Add the title screen sprite palette.

.gitignore

@@ -9,3 +9,4 @@ tools/mxe
 gtm/*
 lemmy/*
 init.z2edit
+hidden/*

content/palettes.textpb

@@ -120,4 +120,7 @@ palettes {
     palette { name: "Background" address: { bank: 5 address: 0xaf40 } }
     palette { name: "Sprites"   address: { bank: 5 address: 0xaf50 } }
     palette { name: "Select Screen" address: { bank: 5 address: 0xbbf8 } }
+    palette { name: "Select Sprites" address: { bank: 5 address: 0xbc08 } }
+    palette { name: "Lives Screen" address: { bank:-1 address: 0xc44c } length: 4 }
+    palette { name: "Lives (sprites)" address: { bank:-1 address: 0xc453 } length: 4 }
 }

imwidget/palette.cc

@@ -73,7 +73,8 @@ bool PaletteEditor::Draw() {
         } else {
             ImGui::Text("%20s", p.name().c_str());
         }
-        for(int i=0; i<16; i++, id++) {
+        int len = p.length() ? p.length() : 16;
+        for(int i=0; i<len; i++, id++) {
             ImGui::SameLine();
             if ((i % 4) == 0) {
                 ImGui::Text(" ");
@@ -102,7 +103,8 @@ void PaletteEditor::Load() {
 
     for(const auto& p: ri.palettes(grpsel_).palette()) {
         Unpacked elem;
-        for(int i=0; i<16; i++) {
+        int len = p.length() ? p.length() : 16;
+        for(int i=0; i<len; i++) {
             elem.color[i] = mapper_->Read(p.address(), i);
         }
         data_.push_back(elem);
@@ -114,7 +116,8 @@ void PaletteEditor::Save() {
     int j = 0;
     const auto& ri = ConfigLoader<RomInfo>::GetConfig();
     for(const auto& p: ri.palettes(grpsel_).palette()) {
-        for(int i=0; !p.hidden() && i<16; i++) {
+        int len = p.length() ? p.length() : 16;
+        for(int i=0; !p.hidden() && i<len; i++) {
             mapper_->Write(p.address(), i, data_[j].color[i]);
             if (i==0 && p.magic_bg().address() != 0) {
                 mapper_->Write(p.magic_bg(), 0, data_[j].color[i]);

proto/rominfo.proto

@@ -137,6 +137,9 @@ message Palette {
     Address address = 2;
     bool hidden = 3;
     Address magic_bg = 4;
+    // The length defaults to 16, but there are a few shortened
+    // tables in the ROM.
+    int32 length = 5;
 }
 
 message PaletteGroup {