A tilemap cannot be a background layer in the first release

src/app/cmd/background_from_layer.cpp

@@ -1,4 +1,5 @@
 // Aseprite
+// Copyright (C) 2019  Igara Studio S.A.
 // Copyright (C) 2001-2016  David Capello
 //
 // This program is distributed under the terms of
@@ -41,21 +42,22 @@ BackgroundFromLayer::BackgroundFromLayer(Layer* layer)
 void BackgroundFromLayer::onExecute()
 {
   Layer* layer = this->layer();
+  ASSERT(!layer->isTilemap());  // TODO support background tilemaps
+
   Sprite* sprite = layer->sprite();
   auto doc = static_cast<Doc*>(sprite->document());
   color_t bgcolor = doc->bgColor();
 
   // Create a temporary image to draw each cel of the new Background
   // layer.
-  ImageRef bg_image(Image::create(sprite->pixelFormat(),
-      sprite->width(),
-      sprite->height()));
+  ImageRef bg_image(Image::create(sprite->spec()));
 
   CelList cels;
   layer->getCels(cels);
   for (Cel* cel : cels) {
     Image* cel_image = cel->image();
     ASSERT(cel_image);
+    ASSERT(cel_image->pixelFormat() != IMAGE_TILEMAP);
 
     clear_image(bg_image.get(), bgcolor);
     render::composite_image(

src/app/cmd/copy_cel.cpp

@@ -24,6 +24,7 @@
 #include "doc/layer.h"
 #include "doc/primitives.h"
 #include "doc/sprite.h"
+#include "render/rasterize.h"
 #include "render/render.h"
 
 namespace app {
@@ -89,9 +90,17 @@ void CopyCel::onExecute()
         !srcCel || !srcImage)
       return;
 
+    ASSERT(!dstLayer->isTilemap());  // TODO support background tilemaps
+
     if (createLink) {
       executeAndAdd(new cmd::SetCelData(dstCel, srcCel->dataRef()));
     }
+    // Rasterize tilemap into the regular image background layer
+    else if (srcLayer->isTilemap()) {
+      ImageRef tmp(Image::createCopy(dstImage.get()));
+      render::rasterize(tmp.get(), srcCel, 0, 0, false);
+      executeAndAdd(new cmd::CopyRect(dstImage.get(), tmp.get(), gfx::Clip(tmp->bounds())));
+    }
     else {
       BlendMode blend = (srcLayer->isBackground() ?
                          BlendMode::SRC:

src/app/cmd/move_cel.cpp

@@ -1,4 +1,5 @@
 // Aseprite
+// Copyright (C) 2019  Igara Studio S.A.
 // Copyright (C) 2001-2016  David Capello
 //
 // This program is distributed under the terms of
@@ -25,6 +26,7 @@
 #include "doc/layer.h"
 #include "doc/primitives.h"
 #include "doc/sprite.h"
+#include "render/rasterize.h"
 #include "render/render.h"
 
 namespace app {
@@ -90,10 +92,18 @@ void MoveCel::onExecute()
         !srcCel || !srcImage)
       return;
 
+    ASSERT(!dstLayer->isTilemap());  // TODO support background tilemaps
+
     if (createLink) {
       executeAndAdd(new cmd::SetCelData(dstCel, srcCel->dataRef()));
       executeAndAdd(new cmd::UnlinkCel(srcCel));
     }
+    // Rasterize tilemap into the regular image background layer
+    else if (srcLayer->isTilemap()) {
+      ImageRef tmp(Image::createCopy(dstImage.get()));
+      render::rasterize(tmp.get(), srcCel, 0, 0, false);
+      executeAndAdd(new cmd::CopyRect(dstImage.get(), tmp.get(), gfx::Clip(tmp->bounds())));
+    }
     else {
       BlendMode blend = (srcLayer->isBackground() ?
                          BlendMode::SRC:

src/app/commands/cmd_background_from_layer.cpp

@@ -1,4 +1,5 @@
 // Aseprite
+// Copyright (C) 2019  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -43,7 +44,10 @@ bool BackgroundFromLayerCommand::onEnabled(Context* context)
     // Doesn't have a background layer
     !context->checkFlags(ContextFlags::HasBackgroundLayer) &&
     // Isn't a reference layer
-    !context->checkFlags(ContextFlags::ActiveLayerIsReference);
+    !context->checkFlags(ContextFlags::ActiveLayerIsReference) &&
+    // Isn't a tilemap layer
+    // TODO support background tilemaps
+    !context->checkFlags(ContextFlags::ActiveLayerIsTilemap);
 }
 
 void BackgroundFromLayerCommand::onExecute(Context* context)

src/app/context_flags.cpp

@@ -99,6 +99,9 @@ void ContextFlags::updateFlagsFromSite(const Site& site)
   if (layer->isReference())
     m_flags |= ActiveLayerIsReference;
 
+  if (layer->isTilemap())
+    m_flags |= ActiveLayerIsTilemap;
+
   if (layer->isImage()) {
     m_flags |= ActiveLayerIsImage;
 

src/app/context_flags.h

@@ -33,7 +33,8 @@ namespace app {
       ActiveLayerIsVisible        = 1 << 11,
       ActiveLayerIsEditable       = 1 << 12,
       ActiveLayerIsReference      = 1 << 13,
-      HasSelectedColors           = 1 << 14,
+      ActiveLayerIsTilemap        = 1 << 14,
+      HasSelectedColors           = 1 << 15,
     };
 
     ContextFlags();