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GL buffer handling cleanup

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Move the buffer handling code into a separate file.
This commit is contained in:
Simon Hausmann 2020-05-20 09:04:55 +02:00
parent 4834de04f9
commit f29aa0a302
2 changed files with 91 additions and 86 deletions
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89
sixtyfps_runtime/rendering_backends/gl/lib.rs
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@ -10,8 +10,6 @@ use sixtyfps_corelib::graphics::{
Color, FillStyle, Frame as GraphicsFrame, GraphicsBackend, RenderingPrimitivesBuilder,
};
use std::cell::RefCell;
use std::marker;
use std::mem;
extern crate alloc;
use alloc::rc::Rc;
@ -22,6 +20,9 @@ use texture::{AtlasAllocation, GLTexture, TextureAtlas};
mod shader;
use shader::Shader;
mod buffers;
use buffers::{GLArrayBuffer, GLIndexBuffer};
#[derive(Copy, Clone)]
pub(crate) struct Vertex {
_pos: [f32; 2],
@ -47,90 +48,6 @@ enum GLRenderingPrimitive {
},
}
struct GLArrayBuffer<ArrayMemberType> {
buffer_id: <GLContext as HasContext>::Buffer,
_type_marker: marker::PhantomData<ArrayMemberType>,
}
impl<ArrayMemberType> GLArrayBuffer<ArrayMemberType> {
fn new(gl: &glow::Context, data: &[ArrayMemberType]) -> Self {
let buffer_id = unsafe { gl.create_buffer().expect("vertex buffer") };
unsafe {
gl.bind_buffer(glow::ARRAY_BUFFER, Some(buffer_id));
let byte_len = mem::size_of_val(&data[0]) * data.len() / mem::size_of::<u8>();
let byte_slice = std::slice::from_raw_parts(data.as_ptr() as *const u8, byte_len);
gl.buffer_data_u8_slice(glow::ARRAY_BUFFER, byte_slice, glow::STATIC_DRAW);
}
Self { buffer_id, _type_marker: marker::PhantomData }
}
fn bind(&self, gl: &glow::Context, attribute_location: u32) {
unsafe {
gl.bind_buffer(glow::ARRAY_BUFFER, Some(self.buffer_id));
// TODO #5: generalize GL array buffer size/data_type handling beyond f32
gl.vertex_attrib_pointer_f32(
attribute_location,
(mem::size_of::<ArrayMemberType>() / mem::size_of::<f32>()) as i32,
glow::FLOAT,
false,
0,
0,
);
gl.enable_vertex_attrib_array(attribute_location);
}
}
// TODO #3: make sure we release GL resources
/*
fn drop(&mut self, gl: &glow::Context) {
unsafe {
gl.delete_buffer(self.buffer_id);
}
}
*/
}
struct GLIndexBuffer<IndexType> {
buffer_id: <GLContext as HasContext>::Buffer,
len: i32,
_vertex_marker: marker::PhantomData<IndexType>,
}
impl<IndexType> GLIndexBuffer<IndexType> {
fn new(gl: &glow::Context, data: &[IndexType]) -> Self {
let buffer_id = unsafe { gl.create_buffer().expect("vertex buffer") };
unsafe {
gl.bind_buffer(glow::ELEMENT_ARRAY_BUFFER, Some(buffer_id));
let byte_len = mem::size_of_val(&data[0]) * data.len() / mem::size_of::<u8>();
let byte_slice = std::slice::from_raw_parts(data.as_ptr() as *const u8, byte_len);
gl.buffer_data_u8_slice(glow::ELEMENT_ARRAY_BUFFER, byte_slice, glow::STATIC_DRAW);
}
Self { buffer_id, len: data.len() as i32, _vertex_marker: marker::PhantomData }
}
fn bind(&self, gl: &glow::Context) {
unsafe {
gl.bind_buffer(glow::ELEMENT_ARRAY_BUFFER, Some(self.buffer_id));
}
}
// TODO #3: make sure we release GL resources
/*
fn drop(&mut self, gl: &glow::Context) {
unsafe {
gl.delete_buffer(self.buffer_id);
}
}
*/
}
struct PreRenderedGlyph {
glyph_allocation: AtlasAllocation,
advance: f32,