1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
|
// ==========================================================
// Bitmap conversion routines
//
// Design and implementation by
// - Floris van den Berg (flvdberg@wxs.nl)
// - Hervй Drolon (drolon@infonie.fr)
// - Jani Kajala (janik@remedy.fi)
//
// 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"
// ----------------------------------------------------------
// internal conversions X to 16 bits (565)
// ----------------------------------------------------------
void DLL_CALLCONV
FreeImage_ConvertLine1To16_565(BYTE *target, BYTE *source, int width_in_pixels, RGBQUAD *palette) {
WORD *new_bits = (WORD *)target;
for (int cols = 0; cols < width_in_pixels; cols++) {
int index = (source[cols >> 3] & (0x80 >> (cols & 0x07))) != 0 ? 1 : 0;
new_bits[cols] = RGB565(palette[index].rgbBlue, palette[index].rgbGreen, palette[index].rgbRed);
}
}
void DLL_CALLCONV
FreeImage_ConvertLine4To16_565(BYTE *target, BYTE *source, int width_in_pixels, RGBQUAD *palette) {
WORD *new_bits = (WORD *)target;
BOOL lonibble = FALSE;
int x = 0;
for (int cols = 0; cols < width_in_pixels; cols++) {
RGBQUAD *grab_palette;
if (lonibble) {
grab_palette = palette + LOWNIBBLE(source[x++]);
} else {
grab_palette = palette + (HINIBBLE(source[x]) >> 4);
}
new_bits[cols] = RGB565(grab_palette->rgbBlue, grab_palette->rgbGreen, grab_palette->rgbRed);
lonibble = !lonibble;
}
}
void DLL_CALLCONV
FreeImage_ConvertLine8To16_565(BYTE *target, BYTE *source, int width_in_pixels, RGBQUAD *palette) {
WORD *new_bits = (WORD *)target;
for (int cols = 0; cols < width_in_pixels; cols++) {
RGBQUAD *grab_palette = palette + source[cols];
new_bits[cols] = RGB565(grab_palette->rgbBlue, grab_palette->rgbGreen, grab_palette->rgbRed);
}
}
void DLL_CALLCONV
FreeImage_ConvertLine16_555_To16_565(BYTE *target, BYTE *source, int width_in_pixels) {
WORD *src_bits = (WORD *)source;
WORD *new_bits = (WORD *)target;
for (int cols = 0; cols < width_in_pixels; cols++) {
new_bits[cols] = RGB565((((src_bits[cols] & FI16_555_BLUE_MASK) >> FI16_555_BLUE_SHIFT) * 0xFF) / 0x1F,
(((src_bits[cols] & FI16_555_GREEN_MASK) >> FI16_555_GREEN_SHIFT) * 0xFF) / 0x1F,
(((src_bits[cols] & FI16_555_RED_MASK) >> FI16_555_RED_SHIFT) * 0xFF) / 0x1F);
}
}
void DLL_CALLCONV
FreeImage_ConvertLine24To16_565(BYTE *target, BYTE *source, int width_in_pixels) {
WORD *new_bits = (WORD *)target;
for (int cols = 0; cols < width_in_pixels; cols++) {
new_bits[cols] = RGB565(source[FI_RGBA_BLUE], source[FI_RGBA_GREEN], source[FI_RGBA_RED]);
source += 3;
}
}
void DLL_CALLCONV
FreeImage_ConvertLine32To16_565(BYTE *target, BYTE *source, int width_in_pixels) {
WORD *new_bits = (WORD *)target;
for (int cols = 0; cols < width_in_pixels; cols++) {
new_bits[cols] = RGB565(source[FI_RGBA_BLUE], source[FI_RGBA_GREEN], source[FI_RGBA_RED]);
source += 4;
}
}
// ----------------------------------------------------------
// smart convert X to 16 bits (565)
// ----------------------------------------------------------
FIBITMAP * DLL_CALLCONV
FreeImage_ConvertTo16Bits565(FIBITMAP *dib) {
if(!FreeImage_HasPixels(dib) || (FreeImage_GetImageType(dib) != FIT_BITMAP)) return NULL;
const int width = FreeImage_GetWidth(dib);
const int height = FreeImage_GetHeight(dib);
const int bpp = FreeImage_GetBPP(dib);
if(bpp == 16) {
if ((FreeImage_GetRedMask(dib) == FI16_555_RED_MASK) && (FreeImage_GetGreenMask(dib) == FI16_555_GREEN_MASK) && (FreeImage_GetBlueMask(dib) == FI16_555_BLUE_MASK)) {
// RGB 555
FIBITMAP *new_dib = FreeImage_Allocate(width, height, 16, FI16_565_RED_MASK, FI16_565_GREEN_MASK, FI16_565_BLUE_MASK);
if(new_dib == NULL) {
return NULL;
}
for (int rows = 0; rows < height; rows++) {
FreeImage_ConvertLine16_555_To16_565(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width);
}
// copy metadata from src to dst
FreeImage_CloneMetadata(new_dib, dib);
return new_dib;
} else {
// RGB 565
return FreeImage_Clone(dib);
}
}
else {
// other bpp cases => convert to RGB 565
FIBITMAP *new_dib = FreeImage_Allocate(width, height, 16, FI16_565_RED_MASK, FI16_565_GREEN_MASK, FI16_565_BLUE_MASK);
if(new_dib == NULL) {
return NULL;
}
// copy metadata from src to dst
FreeImage_CloneMetadata(new_dib, dib);
switch (bpp) {
case 1 :
{
for (int rows = 0; rows < height; rows++) {
FreeImage_ConvertLine1To16_565(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width, FreeImage_GetPalette(dib));
}
return new_dib;
}
case 4 :
{
for (int rows = 0; rows < height; rows++) {
FreeImage_ConvertLine4To16_565(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width, FreeImage_GetPalette(dib));
}
return new_dib;
}
case 8 :
{
for (int rows = 0; rows < height; rows++) {
FreeImage_ConvertLine8To16_565(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width, FreeImage_GetPalette(dib));
}
return new_dib;
}
case 24 :
{
for (int rows = 0; rows < height; rows++) {
FreeImage_ConvertLine24To16_565(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width);
}
return new_dib;
}
case 32 :
{
for (int rows = 0; rows < height; rows++) {
FreeImage_ConvertLine32To16_565(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width);
}
return new_dib;
}
default :
// unreachable code ...
FreeImage_Unload(new_dib);
break;
}
}
return NULL;
}
|
