1 files changed, 65 insertions, 0 deletions
diff --git a/modules/librender/scaler_scanline.c b/modules/librender/scaler_scanline.c
new file mode 100644
index 0000000..93242f2
--- /dev/null
+++ b/modules/librender/scaler_scanline.c
@@ -0,0 +1,65 @@
+/*
+ *  Copyright © 2006-2016 SplinterGU (Fenix/Bennugd)
+ *  Copyright © 2002-2006 Fenix Team (Fenix)
+ *  Copyright © 1999-2002 José Luis Cebrián Pagüe (Fenix)
+ *
+ *  This file is part of Bennu - Game Development
+ *
+ *  This software is provided 'as-is', without any express or implied
+ *  warranty. In no event will the authors be held liable for any damages
+ *  arising from the use of this software.
+ *
+ *  Permission is granted to anyone to use this software for any purpose,
+ *  including commercial applications, and to alter it and redistribute it
+ *  freely, subject to the following restrictions:
+ *
+ *     1. The origin of this software must not be misrepresented; you must not
+ *     claim that you wrote the original software. If you use this software
+ *     in a product, an acknowledgment in the product documentation would be
+ *     appreciated but is not required.
+ *
+ *     2. Altered source versions must be plainly marked as such, and must not be
+ *     misrepresented as being the original software.
+ *
+ *     3. This notice may not be removed or altered from any source
+ *     distribution.
+ *
+ */
+
+/* By Splinter 2007 */
+
+#include <assert.h>
+#include <stdlib.h>
+#include <string.h>
+
+/* --------------------------------------------------------------------------- */
+
+#include "librender.h"
+
+/* --------------------------------------------------------------------------- */
+
+void scanline2x( uint8_t *srcPtr, uint32_t srcPitch, uint8_t *dstPtr, uint32_t dstPitch, int width, int height )
+{
+    const uint32_t nextlineSrc = srcPitch / sizeof( uint16_t );
+    const uint16_t *p = ( const uint16_t * )srcPtr;
+
+    const uint32_t nextlineDst = dstPitch / sizeof( uint16_t );
+    uint16_t *q = ( uint16_t * )dstPtr;
+
+    while ( height-- )
+    {
+        int tmpWidth = width;
+        while ( tmpWidth-- )
+        {
+            *q = *p;
+            *( q + nextlineDst ) = 0;
+            q++;
+            *q = *p;
+            *( q + nextlineDst ) = 0;
+            q++;
+            p++;
+        }
+        p += nextlineSrc - width;
+        q += ( nextlineDst - width ) * 2;
+    }
+}