WARNING: BREAKING: REDESIGNED: Filepath loading API

REDESIGNED: `LoadDirectoryFiles()`
ADDED: `LoadDirectoryFilesEx()`
REDESIGNED: `LoadDroppedFiles()`
ADDED: `IsPathFile()`

This BIG BREAKING change simplifies the functions and gives more control to the user:
 - A new `struct FilePathList` has been added to avoid exposing complex pointers.
 - User is responsible of memory loading/unloading
 - Filepaths loading support recursive directories and file extension filters

5 files changed, 38 insertions, 37 deletions

diff --git a/examples/core/core_drop_files.c b/examples/core/core_drop_files.c
index 129ced10..0a1a71e9 100644
--- a/examples/core/core_drop_files.c
+++ b/examples/core/core_drop_files.c
@@ -22,8 +22,7 @@ int main(void)
 
     InitWindow(screenWidth, screenHeight, "raylib [core] example - drop files");
 
-    int count = 0;
-    char **droppedFiles = { 0 };
+    FilePathList droppedFiles = { 0 };
 
     SetTargetFPS(60);               // Set our game to run at 60 frames-per-second
     //--------------------------------------------------------------------------------------
@@ -35,7 +34,11 @@ int main(void)
         //----------------------------------------------------------------------------------
         if (IsFileDropped())
         {
-            droppedFiles = LoadDroppedFiles(&count);
+            // Is some files have been previously loaded, unload them
+            if (droppedFiles.count > 0) UnloadDroppedFiles(droppedFiles);
+            
+            // Load new dropped files
+            droppedFiles = LoadDroppedFiles();
         }
         //----------------------------------------------------------------------------------
 
@@ -55,7 +58,7 @@ int main(void)
                     if (i%2 == 0) DrawRectangle(0, 85 + 40*i, screenWidth, 40, Fade(LIGHTGRAY, 0.5f));
                     else DrawRectangle(0, 85 + 40*i, screenWidth, 40, Fade(LIGHTGRAY, 0.3f));
 
-                    DrawText(droppedFiles[i], 120, 100 + 40*i, 10, GRAY);
+                    DrawText(droppedFiles.paths[i], 120, 100 + 40*i, 10, GRAY);
                 }
 
                 DrawText("Drop new files...", 100, 110 + 40*count, 20, DARKGRAY);
@@ -67,7 +70,7 @@ int main(void)
 
     // De-Initialization
     //--------------------------------------------------------------------------------------
-    UnloadDroppedFiles();    // Clear internal buffers
+    UnloadDroppedFiles(droppedFiles); // Unload files memory
 
     CloseWindow();          // Close window and OpenGL context
     //--------------------------------------------------------------------------------------
diff --git a/examples/models/models_loading.c b/examples/models/models_loading.c
index 7d4543cd..ee3811ee 100644
--- a/examples/models/models_loading.c
+++ b/examples/models/models_loading.c
@@ -67,35 +67,34 @@ int main(void)
         // Load new models/textures on drag&drop
         if (IsFileDropped())
         {
-            int count = 0;
-            char **droppedFiles = LoadDroppedFiles(&count);
+            FilePathList droppedFiles = LoadDroppedFiles();
 
-            if (count == 1) // Only support one file dropped
+            if (droppedFiles.count == 1) // Only support one file dropped
             {
-                if (IsFileExtension(droppedFiles[0], ".obj") ||
-                    IsFileExtension(droppedFiles[0], ".gltf") ||
-                    IsFileExtension(droppedFiles[0], ".glb") ||
-                    IsFileExtension(droppedFiles[0], ".vox") ||
-                    IsFileExtension(droppedFiles[0], ".iqm"))       // Model file formats supported
+                if (IsFileExtension(droppedFiles.paths[0], ".obj") ||
+                    IsFileExtension(droppedFiles.paths[0], ".gltf") ||
+                    IsFileExtension(droppedFiles.paths[0], ".glb") ||
+                    IsFileExtension(droppedFiles.paths[0], ".vox") ||
+                    IsFileExtension(droppedFiles.paths[0], ".iqm"))       // Model file formats supported
                 {
-                    UnloadModel(model);                     // Unload previous model
-                    model = LoadModel(droppedFiles[0]);     // Load new model
+                    UnloadModel(model);                         // Unload previous model
+                    model = LoadModel(droppedFiles.paths[0]);   // Load new model
                     model.materials[0].maps[MATERIAL_MAP_DIFFUSE].texture = texture; // Set current map diffuse texture
 
                     bounds = GetMeshBoundingBox(model.meshes[0]);
 
                     // TODO: Move camera position from target enough distance to visualize model properly
                 }
-                else if (IsFileExtension(droppedFiles[0], ".png"))  // Texture file formats supported
+                else if (IsFileExtension(droppedFiles.paths[0], ".png"))  // Texture file formats supported
                 {
                     // Unload current model texture and load new one
                     UnloadTexture(texture);
-                    texture = LoadTexture(droppedFiles[0]);
+                    texture = LoadTexture(droppedFiles.paths[0]);
                     model.materials[0].maps[MATERIAL_MAP_DIFFUSE].texture = texture;
                 }
             }
 
-            UnloadDroppedFiles();    // Clear internal buffers
+            UnloadDroppedFiles(droppedFiles);    // Unload filepaths from memory
         }
 
         // Select model on mouse click
diff --git a/examples/models/models_skybox.c b/examples/models/models_skybox.c
index b5e0102d..88202aee 100644
--- a/examples/models/models_skybox.c
+++ b/examples/models/models_skybox.c
@@ -97,18 +97,17 @@ int main(void)
         // Load new cubemap texture on drag&drop
         if (IsFileDropped())
         {
-            int count = 0;
-            char **droppedFiles = LoadDroppedFiles(&count);
+            FilePathList droppedFiles = LoadDroppedFiles();
 
-            if (count == 1)         // Only support one file dropped
+            if (droppedFiles.count == 1)         // Only support one file dropped
             {
-                if (IsFileExtension(droppedFiles[0], ".png;.jpg;.hdr;.bmp;.tga"))
+                if (IsFileExtension(droppedFiles.paths[0], ".png;.jpg;.hdr;.bmp;.tga"))
                 {
                     // Unload current cubemap texture and load new one
                     UnloadTexture(skybox.materials[0].maps[MATERIAL_MAP_CUBEMAP].texture);
                     if (useHDR)
                     {
-                        Texture2D panorama = LoadTexture(droppedFiles[0]);
+                        Texture2D panorama = LoadTexture(droppedFiles.paths[0]);
 
                         // Generate cubemap from panorama texture
                         skybox.materials[0].maps[MATERIAL_MAP_CUBEMAP].texture = GenTextureCubemap(shdrCubemap, panorama, 1024, PIXELFORMAT_UNCOMPRESSED_R8G8B8A8);
@@ -116,7 +115,7 @@ int main(void)
                     }
                     else
                     {
-                        Image img = LoadImage(droppedFiles[0]);
+                        Image img = LoadImage(droppedFiles.paths[0]);
                         skybox.materials[0].maps[MATERIAL_MAP_CUBEMAP].texture = LoadTextureCubemap(img, CUBEMAP_LAYOUT_AUTO_DETECT);
                         UnloadImage(img);
                     }
@@ -125,7 +124,7 @@ int main(void)
                 }
             }
 
-            UnloadDroppedFiles();    // Clear internal buffers
+            UnloadDroppedFiles(droppedFiles);    // Unload filepaths from memory
         }
         //----------------------------------------------------------------------------------
 
diff --git a/examples/text/text_draw_3d.c b/examples/text/text_draw_3d.c
index c82629de..d4b057ec 100644
--- a/examples/text/text_draw_3d.c
+++ b/examples/text/text_draw_3d.c
@@ -141,22 +141,22 @@ int main(void)
         // Handle font files dropped
         if (IsFileDropped())
         {
-            int count = 0;
-            char **droppedFiles = LoadDroppedFiles(&count);
+            FilePathList droppedFiles = LoadDroppedFiles();
 
             // NOTE: We only support first ttf file dropped
-            if (IsFileExtension(droppedFiles[0], ".ttf"))
+            if (IsFileExtension(droppedFiles.paths[0], ".ttf"))
             {
                 UnloadFont(font);
-                font = LoadFontEx(droppedFiles[0], fontSize, 0, 0);
+                font = LoadFontEx(droppedFiles.paths[0], fontSize, 0, 0);
             }
-            else if (IsFileExtension(droppedFiles[0], ".fnt"))
+            else if (IsFileExtension(droppedFiles.paths[0], ".fnt"))
             {
                 UnloadFont(font);
-                font = LoadFont(droppedFiles[0]);
+                font = LoadFont(droppedFiles.paths[0]);
                 fontSize = font.baseSize;
             }
-            UnloadDroppedFiles();
+            
+            UnloadDroppedFiles(droppedFiles);    // Unload filepaths from memory
         }
 
         // Handle Events
diff --git a/examples/text/text_font_filters.c b/examples/text/text_font_filters.c
index 5fb8fc47..32ae11a6 100644
--- a/examples/text/text_font_filters.c
+++ b/examples/text/text_font_filters.c
@@ -79,16 +79,16 @@ int main(void)
         // Load a dropped TTF file dynamically (at current fontSize)
         if (IsFileDropped())
         {
-            int count = 0;
-            char **droppedFiles = LoadDroppedFiles(&count);
+            FilePathList droppedFiles = LoadDroppedFiles();
 
             // NOTE: We only support first ttf file dropped
-            if (IsFileExtension(droppedFiles[0], ".ttf"))
+            if (IsFileExtension(droppedFiles.paths[0], ".ttf"))
             {
                 UnloadFont(font);
-                font = LoadFontEx(droppedFiles[0], (int)fontSize, 0, 0);
-                UnloadDroppedFiles();
+                font = LoadFontEx(droppedFiles.paths[0], (int)fontSize, 0, 0);
             }
+            
+            UnloadDroppedFiles(droppedFiles);    // Unload filepaths from memory
         }
         //----------------------------------------------------------------------------------