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alacritty
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Organize buffer data into struct

This commit is contained in:
Joe Wilm 2016-02-26 22:30:42 -08:00
parent ce96b5df6b
commit eac2d01af4
1 changed files with 40 additions and 9 deletions
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49
src/renderer/mod.rs
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@ -23,6 +23,26 @@ pub struct QuadRenderer {
ebo: GLuint,
}
pub struct PackedQuad {
pub x_tr: f32,
pub y_tr: f32,
pub u_tr: f32,
pub v_tr: f32,
pub x_br: f32,
pub y_br: f32,
pub u_br: f32,
pub v_br: f32,
pub x_bl: f32,
pub y_bl: f32,
pub u_bl: f32,
pub v_bl: f32,
pub x_tl: f32,
pub y_tl: f32,
pub u_tl: f32,
pub v_tl: f32,
}
impl QuadRenderer {
// TODO should probably hand this a transform instead of width/height
pub fn new(width: u32, height: u32) -> QuadRenderer {
@ -81,13 +101,24 @@ impl QuadRenderer {
let rect = get_rect(glyph, x, y);
// top right of character
let vertices: [[f32; 4]; 4] = [
[rect.max_x(), rect.max_y(), 1., 0.], // top-right
[rect.max_x(), rect.min_y(), 1., 1.], // bottom-right
[rect.min_x(), rect.min_y(), 0., 1.], // bottom-left
[rect.min_x(), rect.max_y(), 0., 0.], // top-left
];
let packed = [PackedQuad {
x_tr: rect.max_x(),
y_tr: rect.max_y(),
u_tr: 1.0,
v_tr: 0.0,
x_br: rect.max_x(),
y_br: rect.min_y(),
u_br: 1.0,
v_br: 1.0,
x_bl: rect.min_x(),
y_bl: rect.min_y(),
u_bl: 0.0,
v_bl: 1.0,
x_tl: rect.min_x(),
y_tl: rect.max_y(),
u_tl: 0.0,
v_tl: 0.0,
}];
unsafe {
bind_mask_texture(glyph.tex_id);
@ -97,8 +128,8 @@ impl QuadRenderer {
gl::BufferSubData(
gl::ARRAY_BUFFER,
0,
(4 * 4 * size_of::<f32>()) as isize,
vertices.as_ptr() as *const _
(packed.len() * size_of::<PackedQuad>()) as isize,
packed.as_ptr() as *const _
);
gl::BindBuffer(gl::ARRAY_BUFFER, 0);
gl::BindBuffer(gl::ELEMENT_ARRAY_BUFFER, self.ebo);