Add support to use ColorQuantization from scripts

src/app/CMakeLists.txt

@@ -207,7 +207,6 @@ if(ENABLE_UI)
     commands/cmd_clear_cel.cpp
     commands/cmd_clear_recent_files.cpp
     commands/cmd_close_file.cpp
-    commands/cmd_color_quantization.cpp
     commands/cmd_contiguous_fill.cpp
     commands/cmd_copy.cpp
     commands/cmd_copy_cel.cpp
@@ -494,6 +493,7 @@ add_library(app-lib
   commands/cmd_canvas_size.cpp
   commands/cmd_cel_opacity.cpp
   commands/cmd_change_pixel_format.cpp
+  commands/cmd_color_quantization.cpp
   commands/cmd_crop.cpp
   commands/cmd_export_sprite_sheet.cpp
   commands/cmd_flatten_layers.cpp

src/app/commands/cmd_color_quantization.cpp

@@ -11,7 +11,7 @@
 
 #include "app/app.h"
 #include "app/cmd/set_palette.h"
-#include "app/commands/command.h"
+#include "app/commands/new_params.h"
 #include "app/console.h"
 #include "app/context.h"
 #include "app/context_access.h"
@@ -29,9 +29,18 @@
 
 #include "palette_from_sprite.xml.h"
 
+#include <algorithm>
+
 namespace app {
 
-class ColorQuantizationCommand : public Command {
+struct ColorQuantizationParams : public NewParams {
+  Param<bool> ui { this, true, "ui" };
+  Param<bool> withAlpha { this, true, "withAlpha" };
+  Param<int> maxColors { this, 256, "maxColors" };
+  Param<bool> useRange { this, false, "useRange" };
+};
+
+class ColorQuantizationCommand : public CommandWithNewParams<ColorQuantizationParams> {
 public:
   ColorQuantizationCommand();
 
@@ -41,37 +50,44 @@ protected:
 };
 
 ColorQuantizationCommand::ColorQuantizationCommand()
-  : Command(CommandId::ColorQuantization(), CmdRecordableFlag)
+  : CommandWithNewParams<ColorQuantizationParams>(
+      CommandId::ColorQuantization(),
+      CmdRecordableFlag)
 {
 }
 
-bool ColorQuantizationCommand::onEnabled(Context* context)
+bool ColorQuantizationCommand::onEnabled(Context* ctx)
 {
-  return context->checkFlags(ContextFlags::ActiveDocumentIsWritable);
+  return ctx->checkFlags(ContextFlags::ActiveDocumentIsWritable);
 }
 
-void ColorQuantizationCommand::onExecute(Context* context)
+void ColorQuantizationCommand::onExecute(Context* ctx)
 {
-  try {
+#ifdef ENABLE_UI
+  const bool ui = (params().ui() && ctx->isUIAvailable());
+#endif
+
+  bool withAlpha = params().withAlpha();
+  int maxColors = params().maxColors();
+  bool createPal;
+
+  Site site = ctx->activeSite();
+  PalettePicks entries = site.selectedColors();
+
+#ifdef ENABLE_UI
+  if (ui) {
     app::gen::PaletteFromSprite window;
-    PalettePicks entries;
-
-    Sprite* sprite;
-    frame_t frame;
-    Palette* curPalette;
     {
-      ContextReader reader(context);
-      Site site = context->activeSite();
-      sprite = site.sprite();
-      frame = site.frame();
-      curPalette = sprite->palette(frame);
+      ContextReader reader(ctx);
+      const Palette* curPalette = site.sprite()->palette(site.frame());
+
+      if (!params().withAlpha.isSet())
+        withAlpha = App::instance()->preferences().quantization.withAlpha();
 
       window.newPalette()->setSelected(true);
-      window.alphaChannel()->setSelected(
-        App::instance()->preferences().quantization.withAlpha());
-      window.ncolors()->setText("256");
+      window.alphaChannel()->setSelected(withAlpha);
+      window.ncolors()->setTextf("%d", maxColors);
 
-      ColorBar::instance()->getPaletteView()->getSelectedEntries(entries);
       if (entries.picks() > 1) {
         window.currentRange()->setTextf(
           "%s, %d color(s)",
@@ -91,26 +107,39 @@ void ColorQuantizationCommand::onExecute(Context* context)
     if (window.closer() != window.ok())
       return;
 
-    bool withAlpha = window.alphaChannel()->isSelected();
+    maxColors = window.ncolors()->textInt();
+    withAlpha = window.alphaChannel()->isSelected();
     App::instance()->preferences().quantization.withAlpha(withAlpha);
 
-    bool createPal = false;
     if (window.newPalette()->isSelected()) {
-      int n = window.ncolors()->textInt();
-      n = MAX(1, n);
-      entries = PalettePicks(n);
-      entries.all();
       createPal = true;
     }
-    else if (window.currentPalette()->isSelected()) {
+    else {
+      createPal = false;
+      if (window.currentPalette()->isSelected())
+        entries.all();
+    }
+  }
+  else
+#endif // ENABLE_UI
+  {
+    createPal = (!params().useRange());
+  }
+
+  if (createPal) {
+    entries = PalettePicks(std::max(1, maxColors));
     entries.all();
   }
   if (entries.picks() == 0)
     return;
 
+  try {
+    ContextReader reader(ctx);
+    Sprite* sprite = site.sprite();
+    frame_t frame = site.frame();
+    const Palette* curPalette = site.sprite()->palette(frame);
     Palette tmpPalette(frame, entries.picks());
 
-    ContextReader reader(context);
     SpriteJob job(reader, "Color Quantization");
     const bool newBlend = Preferences::instance().experimental.newBlend();
     job.startJobWithCallback(
@@ -144,9 +173,13 @@ void ColorQuantizationCommand::onExecute(Context* context)
     if (*curPalette != *newPalette)
       job.tx()(new cmd::SetPalette(sprite, frame, newPalette.get()));
 
+#ifdef ENABLE_UI
+    if (ui) {
       set_current_palette(newPalette.get(), false);
       ui::Manager::getDefault()->invalidate();
     }
+#endif // ENABLE_UI
+  }
   catch (const base::Exception& e) {
     Console::showException(e);
   }

src/app/commands/commands_list.h

@@ -12,6 +12,7 @@ FOR_EACH_COMMAND(CanvasSize)
 FOR_EACH_COMMAND(CelOpacity)
 FOR_EACH_COMMAND(ChangePixelFormat)
 FOR_EACH_COMMAND(ColorCurve)
+FOR_EACH_COMMAND(ColorQuantization)
 FOR_EACH_COMMAND(ConvolutionMatrix)
 FOR_EACH_COMMAND(CopyColors)
 FOR_EACH_COMMAND(CropSprite)
@@ -52,7 +53,6 @@ FOR_EACH_COMMAND(ClearCel)
 FOR_EACH_COMMAND(ClearRecentFiles)
 FOR_EACH_COMMAND(CloseAllFiles)
 FOR_EACH_COMMAND(CloseFile)
-FOR_EACH_COMMAND(ColorQuantization)
 FOR_EACH_COMMAND(ContiguousFill)
 FOR_EACH_COMMAND(Copy)
 FOR_EACH_COMMAND(CopyCel)