diff options
Diffstat (limited to 'plugins/AdvaImg/src/FreeImage/ConversionFloat.cpp')
| -rw-r--r-- | plugins/AdvaImg/src/FreeImage/ConversionFloat.cpp | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/plugins/AdvaImg/src/FreeImage/ConversionFloat.cpp b/plugins/AdvaImg/src/FreeImage/ConversionFloat.cpp new file mode 100644 index 0000000000..181ff396e1 --- /dev/null +++ b/plugins/AdvaImg/src/FreeImage/ConversionFloat.cpp @@ -0,0 +1,192 @@ +// ==========================================================
+// 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 Float
+// ----------------------------------------------------------
+
+FIBITMAP * DLL_CALLCONV
+FreeImage_ConvertToFloat(FIBITMAP *dib) {
+ FIBITMAP *src = NULL;
+ FIBITMAP *dst = NULL;
+
+ if (!FreeImage_HasPixels(dib)) return NULL;
+
+ FREE_IMAGE_TYPE src_type = FreeImage_GetImageType(dib);
+
+ // check for allowed conversions
+ switch(src_type) {
+ case FIT_BITMAP:
+ {
+ // allow conversion from 8-bit
+ 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:
+ case FIT_RGB16:
+ case FIT_RGBA16:
+ case FIT_RGBF:
+ case FIT_RGBAF:
+ src = dib;
+ break;
+ case FIT_FLOAT:
+ // float type : clone the src
+ return FreeImage_Clone(dib);
+ default:
+ return NULL;
+ }
+
+ // allocate dst image
+
+ const unsigned width = FreeImage_GetWidth(src);
+ const unsigned height = FreeImage_GetHeight(src);
+
+ dst = FreeImage_AllocateT(FIT_FLOAT, 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 float
+
+ const unsigned src_pitch = FreeImage_GetPitch(src);
+ const unsigned dst_pitch = FreeImage_GetPitch(dst);
+
+ const BYTE *src_bits = (BYTE*)FreeImage_GetBits(src);
+ BYTE *dst_bits = (BYTE*)FreeImage_GetBits(dst);
+
+ switch(src_type) {
+ case FIT_BITMAP:
+ {
+ for(unsigned y = 0; y < height; y++) {
+ const BYTE *src_pixel = (BYTE*)src_bits;
+ float *dst_pixel = (float*)dst_bits;
+ for(unsigned x = 0; x < width; x++) {
+ // convert and scale to the range [0..1]
+ dst_pixel[x] = (float)(src_pixel[x]) / 255;
+ }
+ src_bits += src_pitch;
+ dst_bits += dst_pitch;
+ }
+ }
+ break;
+
+ case FIT_UINT16:
+ {
+ for(unsigned y = 0; y < height; y++) {
+ const WORD *src_pixel = (WORD*)src_bits;
+ float *dst_pixel = (float*)dst_bits;
+
+ for(unsigned x = 0; x < width; x++) {
+ // convert and scale to the range [0..1]
+ dst_pixel[x] = (float)(src_pixel[x]) / 65535;
+ }
+ src_bits += src_pitch;
+ dst_bits += dst_pitch;
+ }
+ }
+ break;
+
+ case FIT_RGB16:
+ {
+ for(unsigned y = 0; y < height; y++) {
+ const FIRGB16 *src_pixel = (FIRGB16*)src_bits;
+ float *dst_pixel = (float*)dst_bits;
+
+ for(unsigned x = 0; x < width; x++) {
+ // convert and scale to the range [0..1]
+ dst_pixel[x] = LUMA_REC709(src_pixel[x].red, src_pixel[x].green, src_pixel[x].blue) / 65535.0F;
+ }
+ src_bits += src_pitch;
+ dst_bits += dst_pitch;
+ }
+ }
+ break;
+
+ case FIT_RGBA16:
+ {
+ for(unsigned y = 0; y < height; y++) {
+ const FIRGBA16 *src_pixel = (FIRGBA16*)src_bits;
+ float *dst_pixel = (float*)dst_bits;
+
+ for(unsigned x = 0; x < width; x++) {
+ // convert and scale to the range [0..1]
+ dst_pixel[x] = LUMA_REC709(src_pixel[x].red, src_pixel[x].green, src_pixel[x].blue) / 65535.0F;
+ }
+ src_bits += src_pitch;
+ dst_bits += dst_pitch;
+ }
+ }
+ break;
+
+ case FIT_RGBF:
+ {
+ for(unsigned y = 0; y < height; y++) {
+ const FIRGBF *src_pixel = (FIRGBF*)src_bits;
+ float *dst_pixel = (float*)dst_bits;
+
+ for(unsigned x = 0; x < width; x++) {
+ // convert (assume pixel values are in the range [0..1])
+ dst_pixel[x] = LUMA_REC709(src_pixel[x].red, src_pixel[x].green, src_pixel[x].blue);
+ }
+ src_bits += src_pitch;
+ dst_bits += dst_pitch;
+ }
+ }
+ break;
+
+ case FIT_RGBAF:
+ {
+ for(unsigned y = 0; y < height; y++) {
+ const FIRGBAF *src_pixel = (FIRGBAF*)src_bits;
+ float *dst_pixel = (float*)dst_bits;
+
+ for(unsigned x = 0; x < width; x++) {
+ // convert (assume pixel values are in the range [0..1])
+ dst_pixel[x] = LUMA_REC709(src_pixel[x].red, src_pixel[x].green, src_pixel[x].blue);
+ }
+ src_bits += src_pitch;
+ dst_bits += dst_pitch;
+ }
+ }
+ break;
+ }
+
+ if(src != dib) {
+ FreeImage_Unload(src);
+ }
+
+ return dst;
+}
+
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