Update raylib.h

Added support form vertical and horizontal 3-patches.
Corrected the distortion caused when destRec size is smaller than 4x4. Now even 1x10 or 0x0 sizes are drawn correctly.

src/raylib.h

@@ -412,13 +412,14 @@ typedef struct RenderTexture2D {
 // RenderTexture type, same as RenderTexture2D
 typedef RenderTexture2D RenderTexture;
 
-typedef struct NinePatch {
+typedef struct NPatch {
     Texture2D texture;      // The texture associated with the 9-patch (maybe Texture2D *, instead?)
     Rectangle sourceRec;    // The 9-patch region in the texture
     Vector2 minSize;        // The minimum size the 9-patch can be shrunk to
     float borderWidth[4];   // The widths of the left, top, right and bottom borders
     int padding[4];         // Helps the n-patch contents fit nicely inside
-} NinePatch;
+    int type;               // The type of this n-patch: 9-patch, 3-patch vertical or 3-patch horizontal
+} NPatch;
 
 // Font character info
 typedef struct CharInfo {
@@ -737,6 +738,13 @@ typedef enum {
     HMD_SONY_PSVR
 } VrDeviceType;
 
+// Type of n-patch
+typedef enum {
+    NPT_9PATCH = 0,         // 3x3
+    NPT_3PATCH_VERTICAL,    // 1x3
+    NPT_3PATCH_HORIZONTAL   // 3x1
+} NPatchType;
+
 // Callbacks to be implemented by users
 typedef void (*TraceLogCallback)(int msgType, const char *text, va_list args);
 
@@ -1007,7 +1015,7 @@ RLAPI void DrawTextureV(Texture2D texture, Vector2 position, Color tint);
 RLAPI void DrawTextureEx(Texture2D texture, Vector2 position, float rotation, float scale, Color tint);  // Draw a Texture2D with extended parameters
 RLAPI void DrawTextureRec(Texture2D texture, Rectangle sourceRec, Vector2 position, Color tint);         // Draw a part of a texture defined by a rectangle
 RLAPI void DrawTexturePro(Texture2D texture, Rectangle sourceRec, Rectangle destRec, Vector2 origin, float rotation, Color tint); // Draw a part of a texture defined by a rectangle with 'pro' parameters
-RLAPI void DrawNinePatch(NinePatch ninePatch, Rectangle destRec, bool usePadding, Vector2 origin, float rotation, Color tint);
+RLAPI void DrawNPatch(NPatch nPatch, Rectangle destRec, bool usePadding, Vector2 origin, float rotation, Color tint); //Draw 9x9, 3x1 or 1x3 stretchable Texture2D
 
 //------------------------------------------------------------------------------------
 // Font Loading and Text Drawing Functions (Module: text)