diff options
Diffstat (limited to 'gpr/source/lib/dng_sdk/dng_1d_table.cpp')
| -rw-r--r-- | gpr/source/lib/dng_sdk/dng_1d_table.cpp | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/gpr/source/lib/dng_sdk/dng_1d_table.cpp b/gpr/source/lib/dng_sdk/dng_1d_table.cpp new file mode 100644 index 0000000..267078e --- /dev/null +++ b/gpr/source/lib/dng_sdk/dng_1d_table.cpp @@ -0,0 +1,195 @@ +/*****************************************************************************/
+// Copyright 2006-2008 Adobe Systems Incorporated
+// All Rights Reserved.
+//
+// NOTICE: Adobe permits you to use, modify, and distribute this file in
+// accordance with the terms of the Adobe license agreement accompanying it.
+/*****************************************************************************/
+
+/* $Id: //mondo/dng_sdk_1_4/dng_sdk/source/dng_1d_table.cpp#1 $ */
+/* $DateTime: 2012/05/30 13:28:51 $ */
+/* $Change: 832332 $ */
+/* $Author: tknoll $ */
+
+/*****************************************************************************/
+
+#include "dng_1d_table.h"
+
+#include "dng_1d_function.h"
+#include "dng_memory.h"
+#include "dng_utils.h"
+
+/*****************************************************************************/
+
+dng_1d_table::dng_1d_table ()
+
+ : fBuffer ()
+ , fTable (NULL)
+
+ {
+
+ }
+
+/*****************************************************************************/
+
+dng_1d_table::~dng_1d_table ()
+ {
+
+ }
+
+/*****************************************************************************/
+
+void dng_1d_table::SubDivide (const dng_1d_function &function,
+ uint32 lower,
+ uint32 upper,
+ real32 maxDelta)
+ {
+
+ uint32 range = upper - lower;
+
+ bool subDivide = (range > (kTableSize >> 8));
+
+ if (!subDivide)
+ {
+
+ real32 delta = Abs_real32 (fTable [upper] -
+ fTable [lower]);
+
+ if (delta > maxDelta)
+ {
+
+ subDivide = true;
+
+ }
+
+ }
+
+ if (subDivide)
+ {
+
+ uint32 middle = (lower + upper) >> 1;
+
+ fTable [middle] = (real32) function.Evaluate (middle * (1.0 / (real64) kTableSize));
+
+ if (range > 2)
+ {
+
+ SubDivide (function, lower, middle, maxDelta);
+
+ SubDivide (function, middle, upper, maxDelta);
+
+ }
+
+ }
+
+ else
+ {
+
+ real64 y0 = fTable [lower];
+ real64 y1 = fTable [upper];
+
+ real64 delta = (y1 - y0) / (real64) range;
+
+ for (uint32 j = lower + 1; j < upper; j++)
+ {
+
+ y0 += delta;
+
+ fTable [j] = (real32) y0;
+
+ }
+
+ }
+
+ }
+
+/*****************************************************************************/
+
+void dng_1d_table::Initialize (dng_memory_allocator &allocator,
+ const dng_1d_function &function,
+ bool subSample)
+ {
+
+ fBuffer.Reset (allocator.Allocate ((kTableSize + 2) * sizeof (real32)));
+
+ fTable = fBuffer->Buffer_real32 ();
+
+ if (subSample)
+ {
+
+ fTable [0 ] = (real32) function.Evaluate (0.0);
+ fTable [kTableSize] = (real32) function.Evaluate (1.0);
+
+ real32 maxDelta = Max_real32 (Abs_real32 (fTable [kTableSize] -
+ fTable [0 ]), 1.0f) *
+ (1.0f / 256.0f);
+
+ SubDivide (function,
+ 0,
+ kTableSize,
+ maxDelta);
+
+ }
+
+ else
+ {
+
+ for (uint32 j = 0; j <= kTableSize; j++)
+ {
+
+ real64 x = j * (1.0 / (real64) kTableSize);
+
+ real64 y = function.Evaluate (x);
+
+ fTable [j] = (real32) y;
+
+ }
+
+ }
+
+ fTable [kTableSize + 1] = fTable [kTableSize];
+
+ }
+
+/*****************************************************************************/
+
+void dng_1d_table::Expand16 (uint16 *table16) const
+ {
+
+ real64 step = (real64) kTableSize / 65535.0;
+
+ real64 y0 = fTable [0];
+ real64 y1 = fTable [1];
+
+ real64 base = y0 * 65535.0 + 0.5;
+ real64 slope = (y1 - y0) * 65535.0;
+
+ uint32 index = 1;
+ real64 fract = 0.0;
+
+ for (uint32 j = 0; j < 0x10000; j++)
+ {
+
+ table16 [j] = (uint16) (base + slope * fract);
+
+ fract += step;
+
+ if (fract > 1.0)
+ {
+
+ index += 1;
+ fract -= 1.0;
+
+ y0 = y1;
+ y1 = fTable [index];
+
+ base = y0 * 65535.0 + 0.5;
+ slope = (y1 - y0) * 65535.0;
+
+ }
+
+ }
+
+ }
+
+/*****************************************************************************/
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