OpenGL-C---Tutorials/Texture.h at master · ImInLoveWithProgramming/OpenGL-C---Tutorials · GitHub

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
#pragma once

#include<iostream>
#include<string>

#include<glew.h>
#include<glfw3.h>

#include<SOIL2.h>

class Texture
{
private:
	GLuint id;
	int width;
	int height;
	unsigned int type;

public:

	Texture(const char* fileName, GLenum type)
	{
		this->type = type;

		unsigned char* image = SOIL_load_image(fileName, &this->width, &this->height, NULL, SOIL_LOAD_RGBA);

		glGenTextures(1, &this->id);
		glBindTexture(type, this->id);

		glTexParameteri(type, GL_TEXTURE_WRAP_S, GL_REPEAT);
		glTexParameteri(type, GL_TEXTURE_WRAP_T, GL_REPEAT);
		glTexParameteri(type, GL_TEXTURE_MAG_FILTER, GL_LINEAR_MIPMAP_LINEAR);
		glTexParameteri(type, GL_TEXTURE_MIN_FILTER, GL_LINEAR);

		if (image)
		{
			glTexImage2D(type, 0, GL_RGBA, this->width, this->height, 0, GL_RGBA, GL_UNSIGNED_BYTE, image);
			glGenerateMipmap(type);
		}
		else
		{
			std::cout << "ERROR::TEXTURE::TEXTURE_LOADING_FAILED: " << fileName <<"\n";
		}

		glActiveTexture(0);
		glBindTexture(type, 0);
		SOIL_free_image_data(image);
	}

	~Texture()
	{
		glDeleteTextures(1, &this->id);
	}

	inline GLuint getID() const { return this->id; }

	void bind(const GLint texture_unit)
	{
		glActiveTexture(GL_TEXTURE0 + texture_unit);
		glBindTexture(this->type, this->id);
	}

	void unbind()
	{
		glActiveTexture(0);
		glBindTexture(this->type, 0);
	}

	void loadFromFile(const char* fileName)
	{
		if (this->id)
		{
			glDeleteTextures(1, &this->id);
		}

		unsigned char* image = SOIL_load_image(fileName, &this->width, &this->height, NULL, SOIL_LOAD_RGBA);

		glGenTextures(1, &this->id);
		glBindTexture(this->type, this->id);

		glTexParameteri(this->type, GL_TEXTURE_WRAP_S, GL_REPEAT);
		glTexParameteri(this->type, GL_TEXTURE_WRAP_T, GL_REPEAT);
		glTexParameteri(this->type, GL_TEXTURE_MAG_FILTER, GL_LINEAR_MIPMAP_LINEAR);
		glTexParameteri(this->type, GL_TEXTURE_MIN_FILTER, GL_LINEAR);

		if (image)
		{
			glTexImage2D(this->type, 0, GL_RGBA, this->width, this->height, 0, GL_RGBA, GL_UNSIGNED_BYTE, image);
			glGenerateMipmap(this->type);
		}
		else
		{
			std::cout << "ERROR::TEXTURE::LOADFROMFILE::TEXTURE_LOADING_FAILED: " << fileName << "\n";
		}

		glActiveTexture(0);
		glBindTexture(this->type, 0);
		SOIL_free_image_data(image);
	}
};