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
|
/*************************************************************************/
/* image_loader_jpegd.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_jpegd.h"
#include "core/os/os.h"
#include "core/string/print_string.h"
#include "thirdparty/jpeg-compressor/jpgd.h"
#include "thirdparty/jpeg-compressor/jpge.h"
#include <string.h>
Error jpeg_load_image_from_buffer(Image *p_image, const uint8_t *p_buffer, int p_buffer_len) {
jpgd::jpeg_decoder_mem_stream mem_stream(p_buffer, p_buffer_len);
jpgd::jpeg_decoder decoder(&mem_stream);
if (decoder.get_error_code() != jpgd::JPGD_SUCCESS) {
return ERR_CANT_OPEN;
}
const int image_width = decoder.get_width();
const int image_height = decoder.get_height();
const int comps = decoder.get_num_components();
if (comps != 1 && comps != 3) {
return ERR_FILE_CORRUPT;
}
if (decoder.begin_decoding() != jpgd::JPGD_SUCCESS) {
return ERR_FILE_CORRUPT;
}
const int dst_bpl = image_width * comps;
Vector<uint8_t> data;
data.resize(dst_bpl * image_height);
uint8_t *dw = data.ptrw();
jpgd::uint8 *pImage_data = (jpgd::uint8 *)dw;
for (int y = 0; y < image_height; y++) {
const jpgd::uint8 *pScan_line;
jpgd::uint scan_line_len;
if (decoder.decode((const void **)&pScan_line, &scan_line_len) != jpgd::JPGD_SUCCESS) {
return ERR_FILE_CORRUPT;
}
jpgd::uint8 *pDst = pImage_data + y * dst_bpl;
if (comps == 1) {
memcpy(pDst, pScan_line, dst_bpl);
} else {
// For images with more than 1 channel pScan_line will always point to a buffer
// containing 32-bit RGBA pixels. Alpha is always 255 and we ignore it.
for (int x = 0; x < image_width; x++) {
pDst[0] = pScan_line[x * 4 + 0];
pDst[1] = pScan_line[x * 4 + 1];
pDst[2] = pScan_line[x * 4 + 2];
pDst += 3;
}
}
}
//all good
Image::Format fmt;
if (comps == 1) {
fmt = Image::FORMAT_L8;
} else {
fmt = Image::FORMAT_RGB8;
}
p_image->create(image_width, image_height, false, fmt, data);
return OK;
}
Error ImageLoaderJPG::load_image(Ref<Image> p_image, Ref<FileAccess> f, BitField<ImageFormatLoader::LoaderFlags> p_flags, float p_scale) {
Vector<uint8_t> src_image;
uint64_t src_image_len = f->get_length();
ERR_FAIL_COND_V(src_image_len == 0, ERR_FILE_CORRUPT);
src_image.resize(src_image_len);
uint8_t *w = src_image.ptrw();
f->get_buffer(&w[0], src_image_len);
Error err = jpeg_load_image_from_buffer(p_image.ptr(), w, src_image_len);
return err;
}
void ImageLoaderJPG::get_recognized_extensions(List<String> *p_extensions) const {
p_extensions->push_back("jpg");
p_extensions->push_back("jpeg");
}
static Ref<Image> _jpegd_mem_loader_func(const uint8_t *p_png, int p_size) {
Ref<Image> img;
img.instantiate();
Error err = jpeg_load_image_from_buffer(img.ptr(), p_png, p_size);
ERR_FAIL_COND_V(err, Ref<Image>());
return img;
}
static Error _jpgd_save_func(const String &p_path, const Ref<Image> &p_img, float p_quality) {
return OK;
}
class ImageLoaderJPGOSFile : public jpge::output_stream {
public:
Ref<FileAccess> f;
virtual bool put_buf(const void *Pbuf, int len) {
f->store_buffer((const uint8_t *)Pbuf, len);
return true;
}
};
class ImageLoaderJPGOSBuffer : public jpge::output_stream {
public:
Vector<uint8_t> *buffer = nullptr;
virtual bool put_buf(const void *Pbuf, int len) {
uint32_t base = buffer->size();
buffer->resize(base + len);
memcpy(buffer->ptrw() + base, Pbuf, len);
return true;
}
};
static Vector<uint8_t> _jpgd_buffer_save_func(const Ref<Image> &p_img, float p_quality) {
ERR_FAIL_COND_V(p_img.is_null() || p_img->is_empty(), Vector<uint8_t>());
Ref<Image> image = p_img;
if (image->get_format() != Image::FORMAT_RGB8) {
image->convert(Image::FORMAT_ETC2_RGB8);
}
jpge::params p;
p.m_quality = CLAMP(p_quality * 100, 1, 100);
Vector<uint8_t> output;
ImageLoaderJPGOSBuffer ob;
ob.buffer = &output;
jpge::jpeg_encoder enc;
enc.init(&ob, image->get_width(), image->get_height(), 3, p);
const uint8_t *src_data = image->get_data().ptr();
for (int i = 0; i < image->get_height(); i++) {
enc.process_scanline(&src_data[i * image->get_width() * 3]);
}
enc.process_scanline(nullptr);
return output;
}
ImageLoaderJPG::ImageLoaderJPG() {
Image::_jpg_mem_loader_func = _jpegd_mem_loader_func;
Image::save_jpg_func = _jpgd_save_func;
Image::save_jpg_buffer_func = _jpgd_buffer_save_func;
}
|