[nostalgia/gfx/studio/tilesheet] Fix export for 4bpp images

sample_project/.nostalgia/type_descriptors/net.drinkingtea.nostalgia.gfx.CompactPalette;1

@@ -0,0 +1,23 @@
+O1;net.drinkingtea.ox.TypeDescriptor;1;{
+	"fieldList" : 
+	[
+		{
+			"fieldName" : "pages",
+			"subscriptLevels" : 2,
+			"subscriptStack" : 
+			[
+				{
+					"subscriptType" : 4
+				},
+				{
+					"subscriptType" : 4
+				}
+			],
+			"typeId" : "B.uint16;0"
+		}
+	],
+	"preloadable" : true,
+	"primitiveType" : 5,
+	"typeName" : "net.drinkingtea.nostalgia.gfx.CompactPalette",
+	"typeVersion" : 1
+}

sample_project/.nostalgia/type_descriptors/net.drinkingtea.nostalgia.gfx.CompactTileSheet;1

@@ -0,0 +1,28 @@
+O1;net.drinkingtea.ox.TypeDescriptor;1;{
+	"fieldList" : 
+	[
+		{
+			"fieldName" : "bpp",
+			"typeId" : "B.int8;0"
+		},
+		{
+			"fieldName" : "defaultPalette",
+			"typeId" : "net.drinkingtea.ox.FileAddress;1"
+		},
+		{
+			"fieldName" : "pixels",
+			"subscriptLevels" : 1,
+			"subscriptStack" : 
+			[
+				{
+					"subscriptType" : 4
+				}
+			],
+			"typeId" : "B.uint8;0"
+		}
+	],
+	"preloadable" : true,
+	"primitiveType" : 5,
+	"typeName" : "net.drinkingtea.nostalgia.gfx.CompactTileSheet",
+	"typeVersion" : 1
+}

sample_project/.nostalgia/type_descriptors/net.drinkingtea.nostalgia.gfx.Palette.PalettePage;2

@@ -0,0 +1,23 @@
+O1;net.drinkingtea.ox.TypeDescriptor;1;{
+	"fieldList" : 
+	[
+		{
+			"fieldName" : "name",
+			"typeId" : "net.drinkingtea.ox.BasicString#8#;1"
+		},
+		{
+			"fieldName" : "colors",
+			"subscriptLevels" : 1,
+			"subscriptStack" : 
+			[
+				{
+					"subscriptType" : 4
+				}
+			],
+			"typeId" : "net.drinkingtea.nostalgia.gfx.PaletteColor;2"
+		}
+	],
+	"primitiveType" : 5,
+	"typeName" : "net.drinkingtea.nostalgia.gfx.Palette.PalettePage",
+	"typeVersion" : 2
+}

sample_project/.nostalgia/type_descriptors/net.drinkingtea.nostalgia.gfx.Palette;5

@@ -0,0 +1,31 @@
+O1;net.drinkingtea.ox.TypeDescriptor;1;{
+	"fieldList" : 
+	[
+		{
+			"fieldName" : "colorNames",
+			"subscriptLevels" : 1,
+			"subscriptStack" : 
+			[
+				{
+					"subscriptType" : 4
+				}
+			],
+			"typeId" : "net.drinkingtea.ox.BasicString#8#;1"
+		},
+		{
+			"fieldName" : "pages",
+			"subscriptLevels" : 1,
+			"subscriptStack" : 
+			[
+				{
+					"subscriptType" : 4
+				}
+			],
+			"typeId" : "net.drinkingtea.nostalgia.gfx.Palette.PalettePage;2"
+		}
+	],
+	"preloadable" : true,
+	"primitiveType" : 5,
+	"typeName" : "net.drinkingtea.nostalgia.gfx.Palette",
+	"typeVersion" : 5
+}

sample_project/.nostalgia/type_descriptors/net.drinkingtea.nostalgia.gfx.PaletteColor;2

@@ -0,0 +1,24 @@
+O1;net.drinkingtea.ox.TypeDescriptor;1;{
+	"fieldList" : 
+	[
+		{
+			"fieldName" : "r",
+			"typeId" : "B.uint8;0"
+		},
+		{
+			"fieldName" : "g",
+			"typeId" : "B.uint8;0"
+		},
+		{
+			"fieldName" : "b",
+			"typeId" : "B.uint8;0"
+		},
+		{
+			"fieldName" : "a",
+			"typeId" : "B.uint8;0"
+		}
+	],
+	"primitiveType" : 5,
+	"typeName" : "net.drinkingtea.nostalgia.gfx.PaletteColor",
+	"typeVersion" : 2
+}

sample_project/.nostalgia/type_descriptors/net.drinkingtea.nostalgia.gfx.TileSheet.SubSheet;5

@@ -0,0 +1,46 @@
+O1;net.drinkingtea.ox.TypeDescriptor;1;{
+	"fieldList" : 
+	[
+		{
+			"fieldName" : "id",
+			"typeId" : "B.int32;0"
+		},
+		{
+			"fieldName" : "name",
+			"typeId" : "net.drinkingtea.ox.BasicString#8#;1"
+		},
+		{
+			"fieldName" : "rows",
+			"typeId" : "B.int32;0"
+		},
+		{
+			"fieldName" : "columns",
+			"typeId" : "B.int32;0"
+		},
+		{
+			"fieldName" : "subsheets",
+			"subscriptLevels" : 1,
+			"subscriptStack" : 
+			[
+				{
+					"subscriptType" : 4
+				}
+			],
+			"typeId" : "net.drinkingtea.nostalgia.gfx.TileSheet.SubSheet;5"
+		},
+		{
+			"fieldName" : "pixels",
+			"subscriptLevels" : 1,
+			"subscriptStack" : 
+			[
+				{
+					"subscriptType" : 4
+				}
+			],
+			"typeId" : "B.uint8;0"
+		}
+	],
+	"primitiveType" : 5,
+	"typeName" : "net.drinkingtea.nostalgia.gfx.TileSheet.SubSheet",
+	"typeVersion" : 5
+}

sample_project/.nostalgia/type_descriptors/net.drinkingtea.nostalgia.gfx.TileSheet;5

@@ -0,0 +1,24 @@
+O1;net.drinkingtea.ox.TypeDescriptor;1;{
+	"fieldList" : 
+	[
+		{
+			"fieldName" : "bpp",
+			"typeId" : "B.int8;0"
+		},
+		{
+			"fieldName" : "idIt",
+			"typeId" : "B.int32;0"
+		},
+		{
+			"fieldName" : "defaultPalette",
+			"typeId" : "net.drinkingtea.ox.BasicString#8#;1"
+		},
+		{
+			"fieldName" : "subsheet",
+			"typeId" : "net.drinkingtea.nostalgia.gfx.TileSheet.SubSheet;5"
+		}
+	],
+	"primitiveType" : 5,
+	"typeName" : "net.drinkingtea.nostalgia.gfx.TileSheet",
+	"typeVersion" : 5
+}

src/nostalgia/modules/gfx/src/studio/tilesheeteditor/tilesheeteditor-imgui.cpp

@@ -36,21 +36,12 @@ OX_MODEL_BEGIN(TileSheetEditorConfig)
 OX_MODEL_END()
 
 static ox::Vector<uint32_t> normalizePixelSizes(
-		ox::Vector<uint8_t> const&inPixels,
-		int const bpp) noexcept {
-	uint_t const bytesPerTile = bpp == 8 ? PixelsPerTile : PixelsPerTile / 2;
+		ox::Vector<uint8_t> const&inPixels) noexcept {
 	ox::Vector<uint32_t> outPixels;
-	if (bytesPerTile == 64) { // 8 BPP
-		outPixels.resize(inPixels.size());
-		for (std::size_t i = 0; i < inPixels.size(); ++i) {
-			outPixels[i] = inPixels[i];
-		}
-	} else { // 4 BPP
-		outPixels.resize(inPixels.size() * 2);
-		for (std::size_t i = 0; i < inPixels.size(); ++i) {
-			outPixels[i * 2 + 0] = inPixels[i] & 0xF;
-			outPixels[i * 2 + 1] = inPixels[i] >> 4;
-		}
+	outPixels.reserve(inPixels.size());
+	outPixels.resize(inPixels.size());
+	for (std::size_t i = 0; i < inPixels.size(); ++i) {
+		outPixels[i] = inPixels[i];
 	}
 	return outPixels;
 }
@@ -409,12 +400,11 @@ void TileSheetEditorImGui::showSubsheetEditor() noexcept {
 ox::Error TileSheetEditorImGui::exportSubhseetToPng(int const scale) const noexcept {
 	OX_REQUIRE(path, studio::saveFile({{"PNG", "png"}}));
 	// subsheet to png
-	auto const&img = m_model.img();
 	auto const&s = m_model.activeSubSheet();
 	auto const&pal = m_model.pal();
 	auto const width = s.columns * TileWidth;
 	auto const height = s.rows * TileHeight;
-	auto pixels = normalizePixelSizes(s.pixels, img.bpp);
+	auto pixels = normalizePixelSizes(s.pixels);
 	pixels = normalizePixelArrangement(pixels, s.columns, scale);
 	auto const err = toPngFile(
 			path,