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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137
use std::mem; use gl; use gl::types::*; use super::{BufferTarget, Usage}; #[derive(Debug, Hash)] pub struct GLBuffer { id: GLuint, stride: usize, kind: BufferTarget, usage: Usage, size: usize, kind_size: usize, length: usize, } impl GLBuffer { #[inline] pub fn new<T>(kind: BufferTarget, stride: usize, usage: Usage, data: &[T]) -> Self { let mut id = 0; let length = data.len(); let kind_size = mem::size_of::<T>(); let size = kind_size * length; let gl_kind = kind.into(); let gl_usage = usage.into(); unsafe { gl::GenBuffers(1, &mut id); gl::BindBuffer(gl_kind, id); gl::BufferData( gl_kind, size as GLsizeiptr, data.as_ptr() as *const GLvoid, gl_usage, ); }; GLBuffer { id: id, stride: stride * kind_size, kind: kind, usage: usage, size: size, kind_size: kind_size, length: length, } } #[inline(always)] pub fn id(&self) -> GLuint { self.id } #[inline(always)] pub fn stride(&self) -> usize { self.stride } #[inline(always)] pub fn kind(&self) -> &BufferTarget { &self.kind } #[inline(always)] pub fn usage(&self) -> &Usage { &self.usage } #[inline(always)] pub fn size(&self) -> usize { self.size } #[inline(always)] pub fn kind_size(&self) -> usize { self.kind_size } #[inline(always)] pub fn length(&self) -> usize { self.length } #[inline] pub fn bind(&self) -> &Self { unsafe { gl::BindBuffer(self.kind.into(), self.id); } self } #[inline] pub fn unbind(&self) -> &Self { unsafe { gl::BindBuffer(self.kind.into(), 0); } self } #[inline] pub fn update<T>(&mut self, data: &[T]) -> &mut Self { let length = data.len(); let kind_size = mem::size_of::<T>(); let size = kind_size * length; let gl_kind = self.kind.into(); let gl_usage = self.usage.into(); unsafe { gl::BindBuffer(gl_kind, self.id); gl::BufferData( gl_kind, size as GLsizeiptr, data.as_ptr() as *const GLvoid, gl_usage, ); }; self.size = size; self.kind_size = kind_size; self.length = length; self } } impl Drop for GLBuffer { #[inline] fn drop(&mut self) { if self.id != 0 { unsafe { gl::DeleteBuffers(1, &self.id); } } } }