polyplex.core.content.gl.textures source code

1 module polyplex.core.content.gl.textures;
2 import polyplex.core.content.textures;
3 import polyplex.utils.logging;
4 import polyplex.core.render;
5 import polyplex.core.render.gl.gloo;
6 import polyplex.core.render.gl.shader;
7 import polyplex.core.color;
8 import std.stdio;
9 
10 
11 alias GlTexture2D = GlTexture2DImpl!(GL_RGBA, 4);
12 
13 public class GlTexture2DImpl(int mode = GL_RGBA, int alignment = 4) : Texture2D {
14 private:
15 	Texture tex;
16 
17 	static int MAX_TEX_UNITS = -1;
18 	
19 protected:
20 	override void rebuffer() {
21 		glPixelStorei(GL_UNPACK_ALIGNMENT, alignment); 
22 		if (tex !is null) {
23 			UpdatePixelData(image.Pixels);
24 			return;
25 		}
26 		tex = new Texture();
27 
28 		Bind();
29 		tex.Image2D(TextureType.Tex2D, 0, mode, image.Width, image.Height, 0, mode, GL_UNSIGNED_BYTE, image.Pixels.ptr);
30 		Unbind();
31 
32 		// Set max texture units.
33 		if (MAX_TEX_UNITS == -1) {
34 			glGetIntegerv(GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS, &MAX_TEX_UNITS);
35 			Logger.Info("Set max texture units to: {0}", MAX_TEX_UNITS);
36 		}
37 	}
38 public:
39 	override uint Id() {
40 		return tex.Id;
41 	}
42 
43 	Texture GLTexture() {
44 		return tex;
45 	}
46 
47 	this(TextureImg img) {
48 		Logger.VerboseDebug("Created GL Texture from image: {0}", img.InternalName);
49 		super(img);
50 	}
51 
52 	this(Color[][] colors) {
53 		super(colors);
54 	}
55 
56 	~this() {
57 		destroy(tex);
58 	}
59 
60 	override void UpdatePixelData(ubyte[] data) {
61 		Bind();
62 		if (image !is null) image.SetPixels(data);
63 		glTexSubImage2D(TextureType.Tex2D, 0, 0, 0, image.Width, image.Height, mode, GL_UNSIGNED_BYTE, data.ptr);
64 		Unbind();
65 	}
66 
67 	/**
68 		Binds the texture.	
69 	*/
70 	override void Bind(int attachPos = 0, Shader s = null) {
71 		if (s is null) {
72 			tex.Bind(TextureType.Tex2D);
73 			return;
74 		}
75 		if (!s.HasUniform("ppTexture")) throw new Exception("Texture2D requires ppTexture sampler2d uniform to attach to!");
76 		if (attachPos > MAX_TEX_UNITS) attachPos = MAX_TEX_UNITS;
77 		if (attachPos < 0) attachPos = 0;
78 
79 		tex.Bind(TextureType.Tex2D);
80 		tex.AttachTo(attachPos);
81 	}
82 
83 	/**
84 		Unbinds the texture.
85 	*/
86 	override void Unbind() {
87 		tex.Unbind();
88 	}
89 }