166 lines
4.1 KiB
C++
166 lines
4.1 KiB
C++
// ==========================================================
|
|
// Flipping routines
|
|
//
|
|
// Design and implementation by
|
|
// - Floris van den Berg (flvdberg@wxs.nl)
|
|
// - Hervé Drolon (drolon@infonie.fr)
|
|
// - Jim Keir (jimkeir@users.sourceforge.net)
|
|
//
|
|
// 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"
|
|
|
|
/**
|
|
Flip the image horizontally along the vertical axis.
|
|
@param src Input image to be processed.
|
|
@return Returns TRUE if successful, FALSE otherwise.
|
|
*/
|
|
BOOL DLL_CALLCONV
|
|
FreeImage_FlipHorizontal(FIBITMAP *src) {
|
|
if (!src) return FALSE;
|
|
|
|
unsigned line = FreeImage_GetLine(src);
|
|
unsigned width = FreeImage_GetWidth(src);
|
|
unsigned height = FreeImage_GetHeight(src);
|
|
|
|
unsigned bytespp = FreeImage_GetLine(src) / FreeImage_GetWidth(src);
|
|
|
|
// copy between aligned memories
|
|
BYTE *new_bits = (BYTE*)FreeImage_Aligned_Malloc(line * sizeof(BYTE), FIBITMAP_ALIGNMENT);
|
|
if (!new_bits) return FALSE;
|
|
|
|
// mirror the buffer
|
|
|
|
for (unsigned y = 0; y < height; y++) {
|
|
BYTE *bits = FreeImage_GetScanLine(src, y);
|
|
memcpy(new_bits, bits, line);
|
|
|
|
switch (FreeImage_GetBPP(src)) {
|
|
case 1 :
|
|
{
|
|
for(unsigned x = 0; x < width; x++) {
|
|
// get pixel at (x, y)
|
|
BOOL value = (new_bits[x >> 3] & (0x80 >> (x & 0x07))) != 0;
|
|
// set pixel at (new_x, y)
|
|
unsigned new_x = width - 1 - x;
|
|
value ? bits[new_x >> 3] |= (0x80 >> (new_x & 0x7)) : bits[new_x >> 3] &= (0xff7f >> (new_x & 0x7));
|
|
}
|
|
}
|
|
break;
|
|
|
|
case 4 :
|
|
{
|
|
for(unsigned c = 0; c < line; c++) {
|
|
bits[c] = new_bits[line - c - 1];
|
|
|
|
BYTE nibble = (bits[c] & 0xF0) >> 4;
|
|
|
|
bits[c] = bits[c] << 4;
|
|
bits[c] |= nibble;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case 8:
|
|
{
|
|
BYTE *dst_data = (BYTE*) bits;
|
|
BYTE *src_data = (BYTE*) (new_bits + line - bytespp);
|
|
for(unsigned c = 0; c < width; c++) {
|
|
*dst_data++ = *src_data--;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case 16:
|
|
{
|
|
WORD *dst_data = (WORD*) bits;
|
|
WORD *src_data = (WORD*) (new_bits + line - bytespp);
|
|
for(unsigned c = 0; c < width; c++) {
|
|
*dst_data++ = *src_data--;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case 24 :
|
|
case 32 :
|
|
case 48:
|
|
case 64:
|
|
case 96:
|
|
case 128:
|
|
{
|
|
BYTE *dst_data = (BYTE*) bits;
|
|
BYTE *src_data = (BYTE*) (new_bits + line - bytespp);
|
|
for(unsigned c = 0; c < width; c++) {
|
|
for(unsigned k = 0; k < bytespp; k++) {
|
|
*dst_data++ = src_data[k];
|
|
}
|
|
src_data -= bytespp;
|
|
}
|
|
}
|
|
break;
|
|
|
|
}
|
|
}
|
|
|
|
FreeImage_Aligned_Free(new_bits);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/**
|
|
Flip the image vertically along the horizontal axis.
|
|
@param src Input image to be processed.
|
|
@return Returns TRUE if successful, FALSE otherwise.
|
|
*/
|
|
|
|
BOOL DLL_CALLCONV
|
|
FreeImage_FlipVertical(FIBITMAP *src) {
|
|
BYTE *From, *Mid;
|
|
|
|
if (!src) return FALSE;
|
|
|
|
// swap the buffer
|
|
|
|
unsigned pitch = FreeImage_GetPitch(src);
|
|
unsigned height = FreeImage_GetHeight(src);
|
|
|
|
// copy between aligned memories
|
|
Mid = (BYTE*)FreeImage_Aligned_Malloc(pitch * sizeof(BYTE), FIBITMAP_ALIGNMENT);
|
|
if (!Mid) return FALSE;
|
|
|
|
From = FreeImage_GetBits(src);
|
|
|
|
unsigned line_s = 0;
|
|
unsigned line_t = (height-1) * pitch;
|
|
|
|
for(unsigned y = 0; y < height/2; y++) {
|
|
|
|
memcpy(Mid, From + line_s, pitch);
|
|
memcpy(From + line_s, From + line_t, pitch);
|
|
memcpy(From + line_t, Mid, pitch);
|
|
|
|
line_s += pitch;
|
|
line_t -= pitch;
|
|
|
|
}
|
|
|
|
FreeImage_Aligned_Free(Mid);
|
|
|
|
return TRUE;
|
|
}
|
|
|