-
Notifications
You must be signed in to change notification settings - Fork 2
/
targa.cpp
executable file
·273 lines (238 loc) · 12.2 KB
/
targa.cpp
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
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
/*
Copyright (C) 2010 Matthew Baranowski, Sander van Rossen & Raven software.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "system.h"
#include "DiskIO.h"
#include "Targa.h"
#include "jpeg_interface.h"
typedef unsigned char byte;
struct TargaHeader {
unsigned char id_length, colormap_type, image_type;
unsigned short colormap_index, colormap_length;
unsigned char colormap_size;
unsigned short x_origin, y_origin, width, height;
unsigned char pixel_size, attributes;
};
void Error (char *error, ...);
void Debug (char *error, ...);
struct wordByte
{
unsigned char byte1;
unsigned char byte2;
};
union wordByteUnion
{
short word;
wordByte b;
};
/*
=======
accepts RGB format data in pixels and writes it uncompressed into file
=======
*/
void writeTGA( char *name, byte *pixels, int width, int height)
{
TargaHeader targa_header;
FILE *fin;
fin = fopen( name, "wb" );
if (!fin) {
Debug( "Coulnd't open file for writing" );
return;
}
memset( &targa_header, 0, sizeof( TargaHeader ) );
fputc( 0, fin ); //targa_header.id_length = 0;
fputc( 0, fin ); //targa_header.colormap_type = 0;
fputc( 2, fin ); //targa_header.image_type = 2;
put16( 0, fin ); //targa_header.colormap_index = 0;
put16( 0, fin ); //targa_header.colormap_length = 0;
fputc( 0, fin ); //targa_header.colormap_size = 0;
put16( 0,fin ); //targa_header.x_origin = 0;
put16( 0, fin ); //targa_header.y_origin = 0;
put16( width, fin );
put16( height,fin );
fputc( 24, fin ); //targa_header.pixel_size = 24 ;
fputc( 0, fin ); //targa_header.attributes = 0;
for (int i = 0; i < width*height*3; i+= 3)
{
fputc( (int)pixels[i+2], fin );
fputc( (int)pixels[i+1], fin );
fputc( (int)pixels[i], fin );
}
fclose(fin);
}
// now attempts to load a JPG if TGA load fails...
//
// (return value sent to "*format" param isn't actually used anywhere)
//
bool loadTGA (char *name, byte **pixels, unsigned int *width, unsigned int *height, unsigned int *format)
{
int columns, rows, numPixels;
byte *pixbuf;
int row, column;
FILE *fin;
byte *targa_rgba;
TargaHeader targa_header;
fin = fopen (name, "rb");
if (!fin) //Debug( "Couldn't read textures" );
{
char sLine[256];
strcpy(sLine,name);
strlwr(sLine);
char *p = strstr(sLine,".tga");
if (p)
{
strcpy(p,".jpg");
LoadJPG( sLine, pixels, (int*)width, (int*)height );
if (*pixels)
return true;
}
return false;
}
targa_header.id_length = fgetc(fin);
targa_header.colormap_type = fgetc(fin);
targa_header.image_type = fgetc(fin);
targa_header.colormap_index = get16(fin);
targa_header.colormap_length = get16(fin);
targa_header.colormap_size = fgetc(fin);
targa_header.x_origin = get16(fin);
targa_header.y_origin = get16(fin);
targa_header.width = get16(fin);
targa_header.height = get16(fin);
targa_header.pixel_size = fgetc(fin);
targa_header.attributes = fgetc(fin);
if (targa_header.image_type!=2
&& targa_header.image_type!=10)
Error ("LoadTGA: Only type 2 and 10 targa RGB images supported\n");
if (targa_header.colormap_type !=0
|| (targa_header.pixel_size!=32 && targa_header.pixel_size!=24))
Error ("Texture_LoadTGA: Only 32 or 24 bit images supported (no colormaps)\n");
*format = targa_header.pixel_size;
columns = targa_header.width;
rows = targa_header.height;
numPixels = columns * rows;
if (width)
*width = columns;
if (height)
*height = rows;
targa_rgba = new unsigned char[numPixels*4];
*pixels = targa_rgba;
if (targa_header.id_length != 0)
fseek(fin, targa_header.id_length, SEEK_CUR); // skip TARGA image comment
if (targa_header.image_type==2) { // Uncompressed, RGB images
for(row=rows-1; row>=0; row--) {
pixbuf = targa_rgba + row*columns*4;
for(column=0; column<columns; column++) {
unsigned char red,green,blue,alphabyte;
switch (targa_header.pixel_size) {
case 24:
blue = getc(fin);
green = getc(fin);
red = getc(fin);
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = 255;
break;
case 32:
blue = getc(fin);
green = getc(fin);
red = getc(fin);
alphabyte = getc(fin);
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = alphabyte;
break;
}
}
}
}
else if (targa_header.image_type==10) { // Runlength encoded RGB images
unsigned char red,green,blue,alphabyte,packetHeader,packetSize,j;
for(row=rows-1; row>=0; row--) {
pixbuf = targa_rgba + row*columns*4;
for(column=0; column<columns; ) {
packetHeader=getc(fin);
packetSize = 1 + (packetHeader & 0x7f);
if (packetHeader & 0x80) { // run-length packet
switch (targa_header.pixel_size) {
case 24:
blue = getc(fin);
green = getc(fin);
red = getc(fin);
alphabyte = 255;
break;
case 32:
blue = getc(fin);
green = getc(fin);
red = getc(fin);
alphabyte = getc(fin);
break;
}
for(j=0;j<packetSize;j++) {
*pixbuf++=red;
*pixbuf++=green;
*pixbuf++=blue;
*pixbuf++=alphabyte;
column++;
if (column==columns) { // run spans across rows
column=0;
if (row>0)
row--;
else
goto breakOut;
pixbuf = targa_rgba + row*columns*4;
}
}
}
else { // non run-length packet
for(j=0;j<packetSize;j++) {
switch (targa_header.pixel_size) {
case 24:
blue = getc(fin);
green = getc(fin);
red = getc(fin);
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = 255;
break;
case 32:
blue = getc(fin);
green = getc(fin);
red = getc(fin);
alphabyte = getc(fin);
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = alphabyte;
break;
}
column++;
if (column==columns) { // pixel packet run spans across rows
column=0;
if (row>0)
row--;
else
goto breakOut;
pixbuf = targa_rgba + row*columns*4;
}
}
}
}
breakOut:;
}
}
fclose(fin);
return true;
}