ws.gl.texture source code

1 module ws.gl.texture;
2 
3 import
4 	ws.log,
5 	ws.file.freeimage,
6 	ws.string,
7 	ws.gl.gl,
8 	ws.gui.point,
9 	ws.file.tga,
10 	ws.exception,
11 	ws.io;
12 
13 __gshared:
14 
15 class Texture {
16 
17 	private static Texture[string] textures;
18 
19 	uint id;
20 	string path;
21 	Point size;
22 
23 	void destroy(){
24 		glDeleteTextures(1, &id);
25 	}
26 
27 	this(){}
28 
29 	this(uint id){
30 		this.id = id;
31 	}
32 
33 	int bind(int where){
34 		glActiveTexture(GL_TEXTURE0 + where);
35 		glBindTexture(GL_TEXTURE_2D, id);
36 		return where;
37 	}
38 
39 	static Texture load(string path){
40 		if(path in textures)
41 			return textures[path];
42 		try {
43 			//auto file = new TGA("materials/" ~ path);
44 			auto file = new FIImage("materials/" ~ path);
45 			auto t = new Texture;
46 			t.path = path;
47 			t.id = 0;
48 			t.size = Point(cast(int)file.width, cast(int)file.height);
49 			textures[path] = t;
50 			if(file.width >= GL_MAX_TEXTURE_SIZE)
51 				Log.warning("Image width too large (" ~ tostring(file.width) ~ " of " ~ tostring(GL_MAX_TEXTURE_SIZE) ~ "): " ~ path);
52 			if(file.height >= GL_MAX_TEXTURE_SIZE)
53 				Log.warning("Image height too large (" ~ tostring(file.height) ~ " of " ~ tostring(GL_MAX_TEXTURE_SIZE) ~ "): " ~ path);
54 			glGenTextures(1, &t.id);
55 			glBindTexture(GL_TEXTURE_2D, t.id);
56 			glTexImage2D(
57 					GL_TEXTURE_2D,
58 					0,
59 					cast(uint)(file.colors == 4 ? GL_RGBA : (file.colors == 3 ? GL_SRGB : 0x1909)),
60 					cast(int)file.width,
61 					cast(int)file.height,
62 					0,
63 					file.colors == 4 ? GL_RGBA : (file.colors == 3 ? GL_RGB : 0x1909),
64 					GL_UNSIGNED_BYTE,
65 					file.data.ptr
66 			);
67 			glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
68 			glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
69 			glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);
70 			glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR_MIPMAP_NEAREST);
71 			glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
72 			glGenerateMipmap(GL_TEXTURE_2D);
73 			float aniso = 0.0f;
74 			glGetFloatv(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &aniso);
75 			glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, aniso);
76 			return t;
77 		}catch(Exception e)
78 			exception("Failed to load texture \"" ~ path ~ "\"", e);
79 		return null;
80 	}
81 
82 }