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
|
package net.tylermurphy.Minecraft.Render.Data;
import java.nio.ByteBuffer;
import java.nio.IntBuffer;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import static org.lwjgl.opengl.GL30.*;
import org.lwjgl.opengl.EXTTextureFilterAnisotropic;
import org.lwjgl.opengl.GL;
import org.lwjgl.stb.STBImage;
import org.lwjgl.system.MemoryStack;
import net.tylermurphy.Minecraft.Util.Constants;
public class Texture {
public ByteBuffer getImage() {
return image;
}
public int getWidth() {
return width;
}
public int getHeight() {
return height;
}
private ByteBuffer image;
private int width, height;
private static List<Integer> ids = new ArrayList<Integer>();
Texture(int width, int heigh, ByteBuffer image) {
this.image = image;
this.height = heigh;
this.width = width;
}
public static Texture loadRawTextureData(String fileName) {
ByteBuffer image;
int width, height;
try (MemoryStack stack = MemoryStack.stackPush()) {
IntBuffer comp = stack.mallocInt(1);
IntBuffer w = stack.mallocInt(1);
IntBuffer h = stack.mallocInt(1);
image = STBImage.stbi_load(Constants.PNG_LOCATION + fileName + ".png", w, h, comp, 4);
if (image == null) {
System.err.println("Couldn't load " + Constants.PNG_LOCATION + fileName + ".png");
}
width = w.get();
height = h.get();
return new Texture(width, height, image);
}
}
private static int loadImage(String fileName) {
int id = glGenTextures();
Texture image = loadRawTextureData(fileName);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, id);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, image.getWidth(), image.getHeight(), 0, GL_RGBA, GL_UNSIGNED_BYTE, image.getImage());
glGenerateMipmap(GL_TEXTURE_2D);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_LOD_BIAS, -1);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glBindTexture(GL_TEXTURE_2D, 0);
ids.add(id);
return id;
}
public static int loadTexture(String fileName) {
return loadImage(fileName);
}
public static int loadFontAtlas(String fileName) {
return loadImage(fileName);
}
public static int loadTexture2DArray(HashMap<Integer, Texture> textures){
int id = glGenTextures();
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, id);
glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_LINEAR);
glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_WRAP_T, GL_REPEAT);
if (GL.getCapabilities().GL_EXT_texture_filter_anisotropic) {
float maxAnisotropy = glGetFloat(EXTTextureFilterAnisotropic.GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT);
glTexParameterf(GL_TEXTURE_2D_ARRAY, EXTTextureFilterAnisotropic.GL_TEXTURE_MAX_ANISOTROPY_EXT, maxAnisotropy);
}
glTexImage3D(GL_TEXTURE_2D_ARRAY, 0, GL_RGBA, textures.get(0).width, textures.get(0).height, textures.values().size(), 0, GL_RGBA, GL_UNSIGNED_BYTE, (ByteBuffer) null);
for(Map.Entry<Integer, Texture> entry : textures.entrySet()){
glTexSubImage3D(GL_TEXTURE_2D_ARRAY, 0, 0, 0, entry.getKey(), entry.getValue().width, entry.getValue().height, 1, GL_RGBA, GL_UNSIGNED_BYTE, entry.getValue().getImage());
}
glGenerateMipmap(GL_TEXTURE_2D_ARRAY);
glBindTexture(GL_TEXTURE_2D_ARRAY, 0);
ids.add(id);
return id;
}
public static void cleanUp(){
for(int id:ids){
glDeleteTextures(id);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D_ARRAY, id);
}
}
}
|
