From 3dfe2108cfab31ba3ee5527e217d0d8e99a51162 Mon Sep 17 00:00:00 2001
From: git perforce import user <a@b>
Date: Tue, 25 Oct 2016 12:29:14 -0600
Subject: Initial commit: PhysX 3.4.0 Update @ 21294896 APEX 1.4.0 Update @
 21275617

[CL 21300167]
---
 .../samples/sampleViewer3/IJGWin32/jcscale.cpp     | 63 ++++++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 KaplaDemo/samples/sampleViewer3/IJGWin32/jcscale.cpp

(limited to 'KaplaDemo/samples/sampleViewer3/IJGWin32/jcscale.cpp')

diff --git a/KaplaDemo/samples/sampleViewer3/IJGWin32/jcscale.cpp b/KaplaDemo/samples/sampleViewer3/IJGWin32/jcscale.cpp
new file mode 100644
index 00000000..6ab20e24
--- /dev/null
+++ b/KaplaDemo/samples/sampleViewer3/IJGWin32/jcscale.cpp
@@ -0,0 +1,63 @@
+/*
+ * jcscale.c
+ *
+ * Copyright (C) 1998, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains sample downscaling by 2^Pt for lossless JPEG.
+ */
+#include "stdafx.h"
+
+#define JPEG_INTERNALS
+//#include "jinclude.h"
+//#include "jpeglib.h"
+//#include "jlossls.h"		/* Private declarations for lossless codec */
+
+
+#ifdef C_LOSSLESS_SUPPORTED
+
+METHODDEF(void)
+simple_downscale(j_compress_ptr cinfo,
+		 JSAMPROW input_buf, JSAMPROW output_buf, JDIMENSION width)
+{
+  j_lossless_c_ptr losslsc = (j_lossless_c_ptr) cinfo->codec;
+  int xindex;
+
+  for (xindex = 0; xindex < (int)width; xindex++)
+    output_buf[xindex] = (JSAMPLE) RIGHT_SHIFT(GETJSAMPLE(input_buf[xindex]),
+					       cinfo->Al);
+}
+
+
+METHODDEF(void)
+noscale(j_compress_ptr cinfo,
+	JSAMPROW input_buf, JSAMPROW output_buf, JDIMENSION width)
+{
+  MEMCOPY(output_buf, input_buf, width * SIZEOF(JSAMPLE));
+  return;
+}
+
+
+METHODDEF(void)
+scaler_start_pass (j_compress_ptr cinfo)
+{
+  j_lossless_c_ptr losslsc = (j_lossless_c_ptr) cinfo->codec;
+
+  /* Set scaler function based on Pt */
+  if (cinfo->Al)
+    losslsc->scaler_scale = simple_downscale;
+  else
+    losslsc->scaler_scale = noscale;
+}
+
+
+GLOBAL(void)
+jinit_c_scaler (j_compress_ptr cinfo)
+{
+  j_lossless_c_ptr losslsc = (j_lossless_c_ptr) cinfo->codec;
+
+  losslsc->scaler_start_pass = scaler_start_pass;
+}
+
+#endif /* C_LOSSLESS_SUPPORTED */
-- 
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