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
|
/*************************************************************************/
/* image_loader_hdr.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "image_loader_hdr.h"
#include "core/os/os.h"
#include "core/string/print_string.h"
Error ImageLoaderHDR::load_image(Ref<Image> p_image, Ref<FileAccess> f, bool p_force_linear, float p_scale) {
String header = f->get_token();
ERR_FAIL_COND_V_MSG(header != "#?RADIANCE" && header != "#?RGBE", ERR_FILE_UNRECOGNIZED, "Unsupported header information in HDR: " + header + ".");
while (true) {
String line = f->get_line();
ERR_FAIL_COND_V(f->eof_reached(), ERR_FILE_UNRECOGNIZED);
if (line.is_empty()) { // empty line indicates end of header
break;
}
if (line.begins_with("FORMAT=")) { // leave option to implement other commands
ERR_FAIL_COND_V_MSG(line != "FORMAT=32-bit_rle_rgbe", ERR_FILE_UNRECOGNIZED, "Only 32-bit_rle_rgbe is supported for HDR files.");
} else if (!line.begins_with("#")) { // not comment
WARN_PRINT("Ignoring unsupported header information in HDR: " + line + ".");
}
}
String token = f->get_token();
ERR_FAIL_COND_V(token != "-Y", ERR_FILE_CORRUPT);
int height = f->get_token().to_int();
token = f->get_token();
ERR_FAIL_COND_V(token != "+X", ERR_FILE_CORRUPT);
int width = f->get_line().to_int();
Vector<uint8_t> imgdata;
imgdata.resize(height * width * (int)sizeof(uint32_t));
{
uint8_t *w = imgdata.ptrw();
uint8_t *ptr = (uint8_t *)w;
if (width < 8 || width >= 32768) {
// Read flat data
f->get_buffer(ptr, (uint64_t)width * height * 4);
} else {
// Read RLE-encoded data
for (int j = 0; j < height; ++j) {
int c1 = f->get_8();
int c2 = f->get_8();
int len = f->get_8();
if (c1 != 2 || c2 != 2 || (len & 0x80)) {
// not run-length encoded, so we have to actually use THIS data as a decoded
// pixel (note this can't be a valid pixel--one of RGB must be >= 128)
ptr[(j * width) * 4 + 0] = uint8_t(c1);
ptr[(j * width) * 4 + 1] = uint8_t(c2);
ptr[(j * width) * 4 + 2] = uint8_t(len);
ptr[(j * width) * 4 + 3] = f->get_8();
f->get_buffer(&ptr[(j * width + 1) * 4], (width - 1) * 4);
continue;
}
len <<= 8;
len |= f->get_8();
ERR_FAIL_COND_V_MSG(len != width, ERR_FILE_CORRUPT, "Invalid decoded scanline length, corrupt HDR.");
for (int k = 0; k < 4; ++k) {
int i = 0;
while (i < width) {
int count = f->get_8();
if (count > 128) {
// Run
int value = f->get_8();
count -= 128;
for (int z = 0; z < count; ++z) {
ptr[(j * width + i++) * 4 + k] = uint8_t(value);
}
} else {
// Dump
for (int z = 0; z < count; ++z) {
ptr[(j * width + i++) * 4 + k] = f->get_8();
}
}
}
}
}
}
//convert
for (int i = 0; i < width * height; i++) {
float exp = pow(2.0f, ptr[3] - 128.0f);
Color c(
ptr[0] * exp / 255.0,
ptr[1] * exp / 255.0,
ptr[2] * exp / 255.0);
if (p_force_linear) {
c = c.to_linear();
}
*(uint32_t *)ptr = c.to_rgbe9995();
ptr += 4;
}
}
p_image->create(width, height, false, Image::FORMAT_RGBE9995, imgdata);
return OK;
}
void ImageLoaderHDR::get_recognized_extensions(List<String> *p_extensions) const {
p_extensions->push_back("hdr");
}
ImageLoaderHDR::ImageLoaderHDR() {
}
|