Initial commit:

PhysX 3.4.0 Update @ 21294896
APEX 1.4.0 Update @ 21275617

[CL 21300167]

1 files changed, 119 insertions, 0 deletions

diff --git a/KaplaDemo/samples/sampleViewer3/IJGWin32/jdscale.cpp b/KaplaDemo/samples/sampleViewer3/IJGWin32/jdscale.cpp
new file mode 100644
index 00000000..d08b5bd8
--- /dev/null
+++ b/KaplaDemo/samples/sampleViewer3/IJGWin32/jdscale.cpp
@@ -0,0 +1,119 @@
+/*
+ * jdscale.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 scaling for lossless JPEG.  This is a
+ * combination of upscaling the undifferenced sample by 2^Pt and downscaling
+ * the sample to fit into JSAMPLE.
+ */
+#include "stdafx.h"
+
+#define JPEG_INTERNALS
+//#include "jinclude.h"
+//#include "jpeglib.h"
+//#include "jlossls.h"		/* Private declarations for lossless codec */
+
+
+#ifdef D_LOSSLESS_SUPPORTED
+
+/*
+ * Private scaler object for lossless decoding.
+ */
+
+typedef struct {
+  int scale_factor;
+} scaler;
+
+typedef scaler * scaler_ptr;
+
+
+/*
+ * Scalers for packing sample differences into JSAMPLEs.
+ */
+
+METHODDEF(void)
+simple_upscale(j_decompress_ptr cinfo,
+	       JDIFFROW diff_buf, JSAMPROW output_buf,
+	       JDIMENSION width)
+{
+  j_lossless_d_ptr losslsd = (j_lossless_d_ptr) cinfo->codec;
+  scaler_ptr scaler = (scaler_ptr) losslsd->scaler_private;
+  int scale_factor = scaler->scale_factor;
+  int xindex;
+
+  for (xindex = 0; xindex < (int)width; xindex++)
+    output_buf[xindex] = (JSAMPLE) (diff_buf[xindex] << scale_factor);
+}
+
+METHODDEF(void)
+simple_downscale(j_decompress_ptr cinfo,
+		 JDIFFROW diff_buf, JSAMPROW output_buf,
+		 JDIMENSION width)
+{
+  j_lossless_d_ptr losslsd = (j_lossless_d_ptr) cinfo->codec;
+  scaler_ptr scaler = (scaler_ptr) losslsd->scaler_private;
+  int scale_factor = scaler->scale_factor;
+  int xindex;
+
+  for (xindex = 0; xindex < (int)width; xindex++)
+    output_buf[xindex] = (JSAMPLE) RIGHT_SHIFT(diff_buf[xindex], scale_factor);
+}
+
+METHODDEF(void)
+noscale(j_decompress_ptr cinfo,
+	JDIFFROW diff_buf, JSAMPROW output_buf,
+	JDIMENSION width)
+{
+  int xindex;
+
+  for (xindex = 0; xindex < (int)width; xindex++)
+    output_buf[xindex] = (JSAMPLE) diff_buf[xindex];
+}
+
+
+METHODDEF(void)
+scaler_start_pass (j_decompress_ptr cinfo)
+{
+  j_lossless_d_ptr losslsd = (j_lossless_d_ptr) cinfo->codec;
+  scaler_ptr scaler = (scaler_ptr) losslsd->scaler_private;
+  int downscale;
+
+  /*
+   * Downscale by the difference in the input vs. output precision.  If the
+   * output precision >= input precision, then do not downscale.
+   */
+  downscale = BITS_IN_JSAMPLE < cinfo->data_precision ?
+    cinfo->data_precision - BITS_IN_JSAMPLE : 0;
+
+  scaler->scale_factor = cinfo->Al - downscale;
+
+  /* Set scaler functions based on scale_factor (positive = left shift) */
+  if (scaler->scale_factor > 0)
+    losslsd->scaler_scale = simple_upscale;
+  else if (scaler->scale_factor < 0) {
+    scaler->scale_factor = -scaler->scale_factor;
+    losslsd->scaler_scale = simple_downscale;
+  }
+  else
+    losslsd->scaler_scale = noscale;
+}
+
+
+GLOBAL(void)
+jinit_d_scaler (j_decompress_ptr cinfo)
+{
+  j_lossless_d_ptr losslsd = (j_lossless_d_ptr) cinfo->codec;
+  scaler_ptr scaler;
+
+  scaler = (scaler_ptr)
+    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				SIZEOF(scaler));
+  losslsd->scaler_private = (void *) scaler;
+  losslsd->scaler_start_pass = scaler_start_pass;
+}
+
+#endif /* D_LOSSLESS_SUPPORTED */
+