Rename convert to process

More consistent with its "main" function's name

src/CMakeLists.txt

@@ -70,10 +70,10 @@ set(rgbfix_src
     )
 
 set(rgbgfx_src
-    "gfx/convert.cpp"
     "gfx/main.cpp"
     "gfx/pal_packing.cpp"
     "gfx/pal_sorting.cpp"
+    "gfx/process.cpp"
     "gfx/proto_palette.cpp"
     "gfx/rgba.cpp"
     "extern/getopt.c"

src/gfx/main.cpp

@@ -24,7 +24,7 @@
 #include "platform.h"
 #include "version.h"
 
-#include "gfx/convert.hpp"
+#include "gfx/process.hpp"
 
 using namespace std::literals::string_view_literals;
 

src/gfx/pal_sorting.cpp

@@ -7,8 +7,8 @@
 
 #include "helpers.h"
 
-#include "gfx/convert.hpp"
 #include "gfx/main.hpp"
+#include "gfx/process.hpp"
 
 namespace sorting {
 

src/gfx/process.cpp

@@ -6,7 +6,7 @@
  * SPDX-License-Identifier: MIT
  */
 
-#include "gfx/convert.hpp"
+#include "gfx/process.hpp"
 
 #include <algorithm>
 #include <assert.h>
@@ -687,7 +687,8 @@ static void outputTileData(Png const &png, DefaultInitVec<AttrmapEntry> const &a
 	for (auto tile : png.visitAsTiles(options.columnMajor)) {
 		size_t protoPaletteID = iter->protoPaletteID;
 		// If the tile is fully transparent, default to palette 0
-		Palette const &palette = palettes[protoPaletteID != AttrmapEntry::transparent ? mappings[protoPaletteID] : 0];
+		Palette const &palette =
+		    palettes[protoPaletteID != AttrmapEntry::transparent ? mappings[protoPaletteID] : 0];
 		for (uint32_t y = 0; y < 8; ++y) {
 			uint16_t bitplanes = TileData::rowBitplanes(tile, palette, y);
 			output.sputc(bitplanes & 0xFF);