diff options
Diffstat (limited to 'plugins/FreeImage/Source/FreeImageToolkit/Rescale.cpp')
| -rw-r--r-- | plugins/FreeImage/Source/FreeImageToolkit/Rescale.cpp | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/plugins/FreeImage/Source/FreeImageToolkit/Rescale.cpp b/plugins/FreeImage/Source/FreeImageToolkit/Rescale.cpp new file mode 100644 index 0000000000..99a31862b9 --- /dev/null +++ b/plugins/FreeImage/Source/FreeImageToolkit/Rescale.cpp @@ -0,0 +1,231 @@ +// ==========================================================
+// Upsampling / downsampling routine
+//
+// 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 "Resize.h"
+
+FIBITMAP * DLL_CALLCONV
+FreeImage_Rescale(FIBITMAP *src, int dst_width, int dst_height, FREE_IMAGE_FILTER filter) {
+ FIBITMAP *dst = NULL;
+
+ if (!FreeImage_HasPixels(src) || (dst_width <= 0) || (dst_height <= 0) || (FreeImage_GetWidth(src) <= 0) || (FreeImage_GetHeight(src) <= 0)) {
+ return NULL;
+ }
+
+ // select the filter
+ CGenericFilter *pFilter = NULL;
+ switch(filter) {
+ case FILTER_BOX:
+ pFilter = new(std::nothrow) CBoxFilter();
+ break;
+ case FILTER_BICUBIC:
+ pFilter = new(std::nothrow) CBicubicFilter();
+ break;
+ case FILTER_BILINEAR:
+ pFilter = new(std::nothrow) CBilinearFilter();
+ break;
+ case FILTER_BSPLINE:
+ pFilter = new(std::nothrow) CBSplineFilter();
+ break;
+ case FILTER_CATMULLROM:
+ pFilter = new(std::nothrow) CCatmullRomFilter();
+ break;
+ case FILTER_LANCZOS3:
+ pFilter = new(std::nothrow) CLanczos3Filter();
+ break;
+ }
+
+ if(!pFilter) {
+ return NULL;
+ }
+
+ CResizeEngine Engine(pFilter);
+
+ // perform upsampling or downsampling
+
+ if((FreeImage_GetBPP(src) == 4) || (FreeImage_GetColorType(src) == FIC_PALETTE)) {
+ // special case for 4-bit images or color map indexed images ...
+ if(FreeImage_IsTransparent(src) == FALSE) {
+ FIBITMAP *src24 = NULL;
+ FIBITMAP *dst24 = NULL;
+ try {
+ // transparent conversion to 24-bit (any transparency table will be destroyed)
+ src24 = FreeImage_ConvertTo24Bits(src);
+ if(!src24) throw(1);
+ // perform upsampling or downsampling
+ dst24 = Engine.scale(src24, dst_width, dst_height);
+ if(!dst24) throw(1);
+ // color quantize to 8-bit
+ dst = FreeImage_ColorQuantize(dst24, FIQ_NNQUANT);
+ // free and return
+ FreeImage_Unload(src24);
+ FreeImage_Unload(dst24);
+ } catch(int) {
+ if(src24) FreeImage_Unload(src24);
+ if(dst24) FreeImage_Unload(dst24);
+ }
+ } else {
+ FIBITMAP *src32 = NULL;
+ try {
+ // transparent conversion to 32-bit (keep transparency)
+ src32 = FreeImage_ConvertTo32Bits(src);
+ if(!src32) throw(1);
+ // perform upsampling or downsampling
+ dst = Engine.scale(src32, dst_width, dst_height);
+ if(!dst) throw(1);
+ // free and return
+ FreeImage_Unload(src32);
+ } catch(int) {
+ if(src32) FreeImage_Unload(src32);
+ if(dst) FreeImage_Unload(dst);
+ }
+ }
+ }
+ else if((FreeImage_GetBPP(src) == 16) && (FreeImage_GetImageType(src) == FIT_BITMAP)) {
+ // convert 16-bit RGB to 24-bit
+ FIBITMAP *src24 = NULL;
+ try {
+ // transparent conversion to 24-bit (any transparency table will be destroyed)
+ src24 = FreeImage_ConvertTo24Bits(src);
+ if(!src24) throw(1);
+ // perform upsampling or downsampling
+ dst = Engine.scale(src24, dst_width, dst_height);
+ if(!dst) throw(1);
+ // free and return
+ FreeImage_Unload(src24);
+ } catch(int) {
+ if(src24) FreeImage_Unload(src24);
+ if(dst) FreeImage_Unload(dst);
+ }
+ }
+ else {
+ // normal case :
+ // 1- or 8-bit greyscale, 24- or 32-bit RGB(A) images
+ // 16-bit greyscale, 48- or 64-bit RGB(A) images
+ // 32-bit float, 96- or 128-bit RGB(A) float images
+ dst = Engine.scale(src, dst_width, dst_height);
+ }
+
+
+ delete pFilter;
+
+ // copy metadata from src to dst
+ FreeImage_CloneMetadata(dst, src);
+
+ return dst;
+}
+
+FIBITMAP * DLL_CALLCONV
+FreeImage_MakeThumbnail(FIBITMAP *dib, int max_pixel_size, BOOL convert) {
+ FIBITMAP *thumbnail = NULL;
+ int new_width, new_height;
+
+ if(!FreeImage_HasPixels(dib) || (max_pixel_size <= 0)) return NULL;
+
+ int width = FreeImage_GetWidth(dib);
+ int height = FreeImage_GetHeight(dib);
+
+ if(max_pixel_size == 0) max_pixel_size = 1;
+
+ if((width < max_pixel_size) && (height < max_pixel_size)) {
+ // image is smaller than the requested thumbnail
+ return FreeImage_Clone(dib);
+ }
+
+ if(width > height) {
+ new_width = max_pixel_size;
+ // change image height with the same ratio
+ double ratio = ((double)new_width / (double)width);
+ new_height = (int)(height * ratio + 0.5);
+ if(new_height == 0) new_height = 1;
+ } else {
+ new_height = max_pixel_size;
+ // change image width with the same ratio
+ double ratio = ((double)new_height / (double)height);
+ new_width = (int)(width * ratio + 0.5);
+ if(new_width == 0) new_width = 1;
+ }
+
+ const FREE_IMAGE_TYPE image_type = FreeImage_GetImageType(dib);
+
+ // perform downsampling using a bilinear interpolation
+
+ switch(image_type) {
+ case FIT_BITMAP:
+ case FIT_UINT16:
+ case FIT_RGB16:
+ case FIT_RGBA16:
+ case FIT_FLOAT:
+ case FIT_RGBF:
+ case FIT_RGBAF:
+ {
+ FREE_IMAGE_FILTER filter = FILTER_BILINEAR;
+ thumbnail = FreeImage_Rescale(dib, new_width, new_height, filter);
+ }
+ break;
+
+ case FIT_INT16:
+ case FIT_UINT32:
+ case FIT_INT32:
+ case FIT_DOUBLE:
+ case FIT_COMPLEX:
+ default:
+ // cannot rescale this kind of image
+ thumbnail = NULL;
+ break;
+ }
+
+ if((thumbnail != NULL) && (image_type != FIT_BITMAP) && convert) {
+ // convert to a standard bitmap
+ FIBITMAP *bitmap = NULL;
+ switch(image_type) {
+ case FIT_UINT16:
+ bitmap = FreeImage_ConvertTo8Bits(thumbnail);
+ break;
+ case FIT_RGB16:
+ bitmap = FreeImage_ConvertTo24Bits(thumbnail);
+ break;
+ case FIT_RGBA16:
+ bitmap = FreeImage_ConvertTo32Bits(thumbnail);
+ break;
+ case FIT_FLOAT:
+ bitmap = FreeImage_ConvertToStandardType(thumbnail, TRUE);
+ break;
+ case FIT_RGBF:
+ bitmap = FreeImage_ToneMapping(thumbnail, FITMO_DRAGO03);
+ break;
+ case FIT_RGBAF:
+ // no way to keep the transparency yet ...
+ FIBITMAP *rgbf = FreeImage_ConvertToRGBF(thumbnail);
+ bitmap = FreeImage_ToneMapping(rgbf, FITMO_DRAGO03);
+ FreeImage_Unload(rgbf);
+ break;
+ }
+ if(bitmap != NULL) {
+ FreeImage_Unload(thumbnail);
+ thumbnail = bitmap;
+ }
+ }
+
+ // copy metadata from src to dst
+ FreeImage_CloneMetadata(thumbnail, dib);
+
+ return thumbnail;
+}
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