1 files changed, 134 insertions, 0 deletions
diff --git a/plugins/AdvaImg/src/FreeImage/ConversionUINT16.cpp b/plugins/AdvaImg/src/FreeImage/ConversionUINT16.cpp
new file mode 100644
index 0000000000..3744cfe3b4
--- /dev/null
+++ b/plugins/AdvaImg/src/FreeImage/ConversionUINT16.cpp
@@ -0,0 +1,134 @@
+// ==========================================================
+// Bitmap conversion routines
+//
+// Design and implementation by
+// - Hervé Drolon (drolon@infonie.fr)
+//
+// This file is part of FreeImage 3
+//
+// COVERED CODE IS PROVIDED UNDER THIS LICENSE ON AN "AS IS" BASIS, WITHOUT WARRANTY
+// OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, WARRANTIES
+// THAT THE COVERED CODE IS FREE OF DEFECTS, MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE
+// OR NON-INFRINGING. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE COVERED
+// CODE IS WITH YOU. SHOULD ANY COVERED CODE PROVE DEFECTIVE IN ANY RESPECT, YOU (NOT
+// THE INITIAL DEVELOPER OR ANY OTHER CONTRIBUTOR) ASSUME THE COST OF ANY NECESSARY
+// SERVICING, REPAIR OR CORRECTION. THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL
+// PART OF THIS LICENSE. NO USE OF ANY COVERED CODE IS AUTHORIZED HEREUNDER EXCEPT UNDER
+// THIS DISCLAIMER.
+//
+// Use at your own risk!
+// ==========================================================
+
+#include "FreeImage.h"
+#include "Utilities.h"
+
+// ----------------------------------------------------------
+//   smart convert X to UINT16
+// ----------------------------------------------------------
+
+FIBITMAP * DLL_CALLCONV
+FreeImage_ConvertToUINT16(FIBITMAP *dib) {
+	FIBITMAP *src = NULL;
+	FIBITMAP *dst = NULL;
+
+	if (!FreeImage_HasPixels(dib)) return NULL;
+
+	const FREE_IMAGE_TYPE src_type = FreeImage_GetImageType(dib);
+
+	// check for allowed conversions 
+	switch(src_type) {
+		case FIT_BITMAP:
+		{
+			// convert to greyscale if needed
+			if ((FreeImage_GetBPP(dib) == 8) && (FreeImage_GetColorType(dib) == FIC_MINISBLACK)) {
+				src = dib;
+			} else {
+				src = FreeImage_ConvertToGreyscale(dib);
+				if (!src) return NULL;
+			}
+			break;
+		}
+		case FIT_UINT16:
+			// UINT16 type : clone the src
+			return FreeImage_Clone(dib);
+			break;
+		case FIT_RGB16:
+			// allow conversion from 48-bit RGB
+			src = dib;
+			break;
+		case FIT_RGBA16:
+			// allow conversion from 64-bit RGBA (ignore the alpha channel)
+			src = dib;
+			break;
+		default:
+			return NULL;
+	}
+
+	// allocate dst image
+
+	const unsigned width = FreeImage_GetWidth(src);
+	const unsigned height = FreeImage_GetHeight(src);
+
+	dst = FreeImage_AllocateT(FIT_UINT16, width, height);
+	if (!dst) {
+		if(src != dib) {
+			FreeImage_Unload(src);
+		}
+		return NULL;
+	}
+
+	// copy metadata from src to dst
+	FreeImage_CloneMetadata(dst, src);
+
+	// convert from src type to UINT16
+
+	switch(src_type) {
+		case FIT_BITMAP:
+		{
+			for(unsigned y = 0; y < height; y++) {
+				const BYTE *src_bits = (BYTE*)FreeImage_GetScanLine(src, y);
+				WORD *dst_bits = (WORD*)FreeImage_GetScanLine(dst, y);
+				for(unsigned x = 0; x < width; x++) {
+					dst_bits[x] = src_bits[x] << 8;
+				}
+			}
+		}
+		break;
+
+		case FIT_RGB16:
+		{
+			for(unsigned y = 0; y < height; y++) {
+				const FIRGB16 *src_bits = (FIRGB16*)FreeImage_GetScanLine(src, y);
+				WORD *dst_bits = (WORD*)FreeImage_GetScanLine(dst, y);
+				for(unsigned x = 0; x < width; x++) {
+					// convert to grey
+					dst_bits[x] = (WORD)LUMA_REC709(src_bits[x].red, src_bits[x].green, src_bits[x].blue);
+				}
+			}
+		}
+		break;
+
+		case FIT_RGBA16:
+		{
+			for(unsigned y = 0; y < height; y++) {
+				const FIRGBA16 *src_bits = (FIRGBA16*)FreeImage_GetScanLine(src, y);
+				WORD *dst_bits = (WORD*)FreeImage_GetScanLine(dst, y);
+				for(unsigned x = 0; x < width; x++) {
+					// convert to grey
+					dst_bits[x] = (WORD)LUMA_REC709(src_bits[x].red, src_bits[x].green, src_bits[x].blue);
+				}
+			}
+		}
+		break;
+
+		default:
+			break;
+	}
+
+	if(src != dib) {
+		FreeImage_Unload(src);
+	}
+
+	return dst;
+}
+