blob: 685d0209ec6eb2976b3175ed42aaa5eeb9ada228 (
plain) (
blame)
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
|
#include "stdafx.h"
#include "CPPJPEGWrapper.h"
CPPJPEGWrapper::CPPJPEGWrapper() {
data = 0;
x = 0;
y = 0;
}
CPPJPEGWrapper::~CPPJPEGWrapper() {
Unload();
}
void CPPJPEGWrapper::Unload() {
if (data) {
delete [] data;
data = 0;
}
}
unsigned char* CPPJPEGWrapper::GetData() const {
return data;
}
unsigned CPPJPEGWrapper::GetWidth() {
return x;
}
unsigned CPPJPEGWrapper::GetHeight() {
return y;
}
unsigned CPPJPEGWrapper::GetBPP() {
return bpp;
}
unsigned CPPJPEGWrapper::GetChannels() {
return channels;
}
bool CPPJPEGWrapper::LoadJPEG(const char* FileName, bool Fast)
{
Unload();
FILE* file = fopen(FileName, "rb"); //open the file
if (!file) return false;
struct jpeg_decompress_struct info; //the jpeg decompress info
struct jpeg_error_mgr err; //the error handler
info.err = jpeg_std_error(&err); //tell the jpeg decompression handler to send the errors to err
jpeg_create_decompress(&info); //sets info to all the default stuff
//if the jpeg file didnt load exit
if(!file)
{
//fprintf(stderr, "Error reading JPEG file %s!!!", FileName);
//LoadBlackWhiteBorder();
return false;
}
jpeg_stdio_src(&info, file); //tell the jpeg lib the file we'er reading
jpeg_read_header(&info, TRUE); //tell it to start reading it
//if it wants to be read fast or not
if(Fast)
{
info.do_fancy_upsampling = FALSE;
}
jpeg_start_decompress(&info); //decompress the file
//set the x and y
x = info.output_width;
y = info.output_height;
channels = info.num_components;
bpp = channels * 8;
size = x * y * 3;
//read turn the uncompressed data into something ogl can read
data = new unsigned char[size]; //setup data for the data its going to be handling
unsigned char* p1 = data;
unsigned char** p2 = &p1;
int numlines = 0;
while(info.output_scanline < info.output_height)
{
numlines = jpeg_read_scanlines(&info, p2, 1);
*p2 += numlines * 3 * info.output_width;
}
jpeg_finish_decompress(&info); //finish decompressing this file
fclose(file); //close the file
return true;
}
|