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
|
/** ---------------------------------------------------------------------------
* @file: imageloader.cpp
*
* Copyright (c) 2017 Yann Herklotz Grave <ymherklotz@gmail.com>
* MIT License, see LICENSE file for more details.
* ----------------------------------------------------------------------------
*/
#include "imageloader.h"
#include "../data/texture.h"
#include <glad/glad.h>
#include <yage/core/iomanager.h>
#include <yage/core/picopng.h>
#include <iostream>
#include <stdexcept>
namespace yage
{
Texture ImageLoader::loadPng(const std::string &file_path)
{
std::vector<unsigned char> in;
std::vector<unsigned char> out;
unsigned long width, height;
if (!IoManager::readFileToBuffer(file_path, in)) {
throw std::runtime_error("Failed to load '" + file_path +
"' to buffer");
}
int error_code = decodePNG(out, width, height, &in[0], in.size());
if (error_code != 0) {
throw std::runtime_error("Failed to load '" + file_path +
"' to png with error code" +
std::to_string(error_code));
}
Texture texture(0, static_cast<int>(width), static_cast<int>(height));
std::cout << "Geometry: " << texture.width << "x" << texture.height << "\n";
glGenTextures(1, &texture.id);
glBindTexture(GL_TEXTURE_2D, texture.id);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA,
GL_UNSIGNED_BYTE, &out[0]);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
GL_LINEAR_MIPMAP_LINEAR);
glGenerateMipmap(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, 0);
return texture;
}
} // namespace yage
|
