Add support for layers with conditional tiles.

For enable this mode for layer need add property: TileCondition
and set value to one of BlockMask bits.

6 files changed, 66 insertions, 8 deletions

diff --git a/src/resources/map/map.cpp b/src/resources/map/map.cpp
index de6090dc2..d05bb2c23 100644
--- a/src/resources/map/map.cpp
+++ b/src/resources/map/map.cpp
@@ -1645,3 +1645,17 @@ void Map::setActorsFix(const int x, const int y)
     if (mFringeLayer)
         mFringeLayer->setActorsFix(y);
 }
+
+void Map::updateConditionLayers()
+{
+    mRedrawMap = true;
+
+    FOR_EACH (LayersCIter, it, mLayers)
+    {
+        MapLayer *const layer = *it;
+        if (!layer || layer->mTileCondition == -1)
+            continue;
+        layer->updateConditionTiles(mMetaTiles,
+            mWidth, mHeight);
+    }
+}
diff --git a/src/resources/map/map.h b/src/resources/map/map.h
index 65fcb8f00..c3f4c7cac 100644
--- a/src/resources/map/map.h
+++ b/src/resources/map/map.h
@@ -339,6 +339,8 @@ class Map final : public Properties, public ConfigListener
         bool isHeightsPresent() const
         { return mHeights != nullptr; }
 
+        void updateConditionLayers();
+
     protected:
         friend class Actor;
         friend class Minimap;
diff --git a/src/resources/map/maplayer.cpp b/src/resources/map/maplayer.cpp
index 57583aef9..920a0f363 100644
--- a/src/resources/map/maplayer.cpp
+++ b/src/resources/map/maplayer.cpp
@@ -30,6 +30,7 @@
 
 #include "being/localplayer.h"
 
+#include "enums/resources/map/blockmask.h"
 #include "enums/resources/map/mapitemtype.h"
 
 #include "gui/userpalette.h"
@@ -40,6 +41,7 @@
 
 #include "resources/map/mapitem.h"
 #include "resources/map/maprowvertexes.h"
+#include "resources/map/metatile.h"
 #include "resources/map/speciallayer.h"
 
 #include "debug.h"
@@ -132,6 +134,8 @@ void MapLayer::draw(Graphics *const graphics,
 
         for (int x = startX; x < endX; x++, tilePtr++)
         {
+            if (!tilePtr->isEnabled)
+                continue;
             const int x32 = x * mapTileSize;
 
             int c = 0;
@@ -144,7 +148,7 @@ void MapLayer::draw(Graphics *const graphics,
                 {
                     int width = 0;
                     // here need not draw over player position
-                    c = getTileDrawWidth(img, endX - x, width);
+                    c = getTileDrawWidth(tilePtr, endX - x, width);
 
                     if (!c)
                     {
@@ -225,6 +229,8 @@ void MapLayer::updateSDL(const Graphics *const graphics,
 
         for (int x = startX; x < endX; x++, tilePtr++)
         {
+            if (!tilePtr->isEnabled)
+                continue;
             Image *const img = (*tilePtr).image;
             if (img)
             {
@@ -287,6 +293,8 @@ void MapLayer::updateOGL(Graphics *const graphics,
         TileInfo *tilePtr = &mTiles[static_cast<size_t>(startX + yWidth)];
         for (int x = startX; x < endX; x++, tilePtr++)
         {
+            if (!tilePtr->isEnabled)
+                continue;
             Image *const img = (*tilePtr).image;
             if (img)
             {
@@ -501,7 +509,7 @@ void MapLayer::drawFringe(Graphics *const graphics,
                         const int py = py0 - img->mBounds.h;
                         int width = 0;
                         // here need not draw over player position
-                        c = getTileDrawWidth(img, endX - x, width);
+                        c = getTileDrawWidth(tilePtr, endX - x, width);
 
                         if (!c)
                         {
@@ -583,7 +591,7 @@ void MapLayer::drawFringe(Graphics *const graphics,
                     {
                         int width = 0;
                         // here need not draw over player position
-                        const int c = getTileDrawWidth(img, endX - x, width);
+                        const int c = getTileDrawWidth(tilePtr, endX - x, width);
 
                         if (!c)
                         {
@@ -646,12 +654,12 @@ void MapLayer::drawFringe(Graphics *const graphics,
     BLOCK_END("MapLayer::drawFringe")
 }
 
-int MapLayer::getTileDrawWidth(const Image *img,
+int MapLayer::getTileDrawWidth(const TileInfo *tilePtr,
                                const int endX,
                                int &width)
 {
     BLOCK_START("MapLayer::getTileDrawWidth")
-    const Image *const img1 = img;
+    const Image *const img1 = tilePtr->image;
     int c = 0;
     if (!img1)
     {
@@ -662,7 +670,8 @@ int MapLayer::getTileDrawWidth(const Image *img,
     width = img1->mBounds.w;
     for (int x = 1; x < endX; x++)
     {
-        img ++;
+        tilePtr ++;
+        const Image *const img = tilePtr->image;
         if (img != img1)
             break;
         c ++;
@@ -680,3 +689,28 @@ void MapLayer::setDrawLayerFlags(const MapTypeT &n)
         && mDrawLayerFlags != MapType::SPECIAL2
         && mDrawLayerFlags != MapType::SPECIAL4);
 }
+
+void MapLayer::updateConditionTiles(MetaTile *const metaTiles,
+                                    const int width, const int height)
+{
+    const int width1 = width < mWidth ? width : mWidth;
+    const int height1 = height < mHeight ? height : mHeight;
+
+    for (int y = mY; y < height1; y ++)
+    {
+        MetaTile *metaPtr = metaTiles + (y - mY) * width;
+        TileInfo *tilePtr = mTiles + y * mWidth;
+        for (int x = mX; x < width1; x ++, metaPtr ++, tilePtr ++)
+        {
+            if (metaPtr->blockmask & mTileCondition ||
+                (metaPtr->blockmask == 0 && mTileCondition == BlockMask::GROUND))
+            {
+                tilePtr->isEnabled = true;
+            }
+            else
+            {
+                tilePtr->isEnabled = false;
+            }
+        }
+    }
+}
diff --git a/src/resources/map/maplayer.h b/src/resources/map/maplayer.h
index 2c1832691..9c0fc12c0 100644
--- a/src/resources/map/maplayer.h
+++ b/src/resources/map/maplayer.h
@@ -37,6 +37,8 @@ class Image;
 class MapRowVertexes;
 class SpecialLayer;
 
+struct MetaTile;
+
 /**
  * A map layer. Stores a grid of tiles and their offset, and implements layer
  * rendering.
@@ -152,10 +154,13 @@ class MapLayer final: public ConfigListener
         { mActorsFix = y; }
 
     protected:
-        static int getTileDrawWidth(const Image *img,
+        static int getTileDrawWidth(const TileInfo *img,
                                     const int endX,
                                     int &width) A_WARN_UNUSED;
 
+        void updateConditionTiles(MetaTile *const metaTiles,
+                                  const int width, const int height);
+
     private:
         const int mX;
         const int mY;
diff --git a/src/resources/map/tileinfo.h b/src/resources/map/tileinfo.h
index 4edd6d2b9..dc5120c95 100644
--- a/src/resources/map/tileinfo.h
+++ b/src/resources/map/tileinfo.h
@@ -28,11 +28,13 @@ class Image;
 struct TileInfo final
 {
     TileInfo() :
-        image(nullptr)
+        image(nullptr),
+        isEnabled(true)
     {
     }
 
     Image *image;
+    bool isEnabled;
 };
 
 #endif  // RESOURCES_MAP_TILEINFO_H
diff --git a/src/resources/mapreader.cpp b/src/resources/mapreader.cpp
index 4fbef0d1b..9c0a9648f 100644
--- a/src/resources/mapreader.cpp
+++ b/src/resources/mapreader.cpp
@@ -272,6 +272,7 @@ Map *MapReader::readMap(const std::string &restrict filename,
             updateMusic(map);
     }
 
+    map->updateConditionLayers();
     BLOCK_END("MapReader::readMap str")
     return map;
 }