hip.hiprenderer.framebuffer source code

1 /*
2 Copyright: Marcelo S. N. Mancini (Hipreme|MrcSnm), 2018 - 2021
3 License:   [https://creativecommons.org/licenses/by/4.0/|CC BY-4.0 License].
4 Authors: Marcelo S. N. Mancini
5 
6 	Copyright Marcelo S. N. Mancini 2018 - 2021.
7 Distributed under the CC BY-4.0 License.
8    (See accompanying file LICENSE.txt or copy at
9 	https://creativecommons.org/licenses/by/4.0/
10 */
11 module hip.hiprenderer.framebuffer;
12 import hip.hiprenderer.shader;
13 import hip.hiprenderer.renderer;
14 import hip.api.renderer.texture;
15 
16 
17 
18 interface IHipFrameBuffer
19 {
20     ///Creates the framebuffer using the target width and height
21     void create(uint width, uint height);
22 
23     ///Resizes the framebuffer, probably this will not be implemented in the backend level
24     void resize(uint width, uint height);
25 
26     ///Binds the framebuffer, setting it as a target for every draw call
27     void bind();
28     ///Unbinds the framebuffer, resetting the renderer state and setting the output as the screen
29     void unbind();
30     ///Must draw the framebuffer content
31     void draw();
32 
33     ///Clears the current framebuffer content
34     void clear();
35 
36     ///Gets the texture containing the framebuffer data
37     IHipTexture getTexture();
38 
39     void dispose();
40 }
41 
42 class HipFrameBuffer : IHipFrameBuffer
43 {
44     Shader currentShader;
45     protected IHipFrameBuffer impl;
46     int width, height;
47     this(IHipFrameBuffer fbImpl, int width, int height, Shader framebufferShader = null)
48     {
49         impl = fbImpl;
50         this.width = width;
51         this.height = height;
52         if(framebufferShader is null)
53             currentShader = HipRenderer.newShader(HipShaderPresets.FRAME_BUFFER);
54     }
55     void create(uint width, uint height){}
56     void resize(uint width, uint height){}
57 
58     void bind()
59     {
60         this.impl.bind();
61     }
62     void unbind()
63     {
64         this.impl.unbind();
65     }
66     void clear()
67     {
68         this.impl.clear();
69     }
70     IHipTexture getTexture(){return impl.getTexture();}
71 
72     void draw()
73     {
74         currentShader.bind();
75         impl.draw();
76     }
77 
78     void dispose(){impl.dispose();}
79 
80 }
81 
82 
83 package const float[24] framebufferVertices = //X, Y, S, T
84 [
85     //First Quad
86     //Top Left
87     -1.0, -1.0, 0.0, 0.0,
88 
89     //Top Right
90     1.0, -1.0, 1.0, 0.0,
91 
92     //Bot Right
93     1.0, 1.0, 1.0, 1.0,
94 
95     //Second quad
96 
97     //Bot Right
98     1.0, 1.0, 1.0, 1.0,
99 
100     //Bot Left
101     -1.0, 1.0, 0.0, 1.0,
102 
103     //Top Left
104     -1.0, -1.0, 0.0, 0.0
105 ];