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render: simplify buffer coordinates

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This commit is contained in:
Julian Orth 2024-02-27 23:44:05 +01:00
parent 85c11448fb
commit 7d3b8b6278
10 changed files with 337 additions and 419 deletions
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62
src/gfx_apis/gl.rs
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@ -68,7 +68,8 @@ macro_rules! dynload {
use {
crate::{
gfx_api::{
BufferPoints, CopyTexture, FillRect, GfxApiOpt, GfxContext, GfxError, GfxTexture,
CopyTexture, FillRect, FramebufferRect, GfxApiOpt, GfxContext, GfxError, GfxTexture,
SampleRect,
},
gfx_apis::gl::{
gl::texture::image_target,
@ -184,7 +185,7 @@ enum RenderError {
#[derive(Default)]
struct GfxGlState {
triangles: RefCell<Vec<f32>>,
triangles: RefCell<Vec<[f32; 2]>>,
fill_rect: VecStorage<&'static FillRect>,
copy_tex: VecStorage<&'static CopyTexture>,
}
@ -198,8 +199,6 @@ fn run_ops(fb: &Framebuffer, ops: &[GfxApiOpt]) {
let copy_tex = &mut *copy_tex;
let mut triangles = state.triangles.borrow_mut();
let triangles = &mut *triangles;
let width = fb.gl.width as f32;
let height = fb.gl.height as f32;
let mut i = 0;
while i < ops.len() {
macro_rules! has_ops {
@ -240,19 +239,14 @@ fn run_ops(fb: &Framebuffer, ops: &[GfxApiOpt]) {
Some(c) if c == fr.color => {}
_ => break,
}
let x1 = 2.0 * (fr.rect.x1 / width) - 1.0;
let x2 = 2.0 * (fr.rect.x2 / width) - 1.0;
let y1 = 2.0 * (fr.rect.y1 / height) - 1.0;
let y2 = 2.0 * (fr.rect.y2 / height) - 1.0;
let [top_right, top_left, bottom_right, bottom_left] = fr.rect.to_points();
triangles.extend_from_slice(&[
// triangle 1
x2, y1, // top right
x1, y1, // top left
x1, y2, // bottom left
// triangle 2
x2, y1, // top right
x1, y2, // bottom left
x2, y2, // bottom right
top_right,
top_left,
bottom_left,
top_right,
bottom_left,
bottom_right,
]);
i += 1;
}
@ -262,16 +256,12 @@ fn run_ops(fb: &Framebuffer, ops: &[GfxApiOpt]) {
}
}
for tex in &*copy_tex {
let x1 = 2.0 * (tex.target.x1 / width) - 1.0;
let y1 = 2.0 * (tex.target.y1 / height) - 1.0;
let x2 = 2.0 * (tex.target.x2 / width) - 1.0;
let y2 = 2.0 * (tex.target.y2 / height) - 1.0;
render_texture(&fb.ctx, &tex.tex.as_gl(), x1, y1, x2, y2, &tex.source)
render_texture(&fb.ctx, &tex.tex.as_gl(), &tex.target, &tex.source)
}
}
}
fn fill_boxes3(ctx: &GlRenderContext, boxes: &[f32], color: &Color) {
fn fill_boxes3(ctx: &GlRenderContext, boxes: &[[f32; 2]], color: &Color) {
let gles = ctx.ctx.dpy.gles;
unsafe {
(gles.glUseProgram)(ctx.fill_prog.prog);
@ -285,7 +275,7 @@ fn fill_boxes3(ctx: &GlRenderContext, boxes: &[f32], color: &Color) {
boxes.as_ptr() as _,
);
(gles.glEnableVertexAttribArray)(ctx.fill_prog_pos as _);
(gles.glDrawArrays)(GL_TRIANGLES, 0, (boxes.len() / 2) as _);
(gles.glDrawArrays)(GL_TRIANGLES, 0, boxes.len() as _);
(gles.glDisableVertexAttribArray)(ctx.fill_prog_pos as _);
}
}
@ -293,11 +283,8 @@ fn fill_boxes3(ctx: &GlRenderContext, boxes: &[f32], color: &Color) {
fn render_texture(
ctx: &GlRenderContext,
texture: &Texture,
x1: f32,
y1: f32,
x2: f32,
y2: f32,
src: &BufferPoints,
target_rect: &FramebufferRect,
src: &SampleRect,
) {
assert!(rc_eq(&ctx.ctx, &texture.ctx.ctx));
let gles = ctx.ctx.dpy.gles;
@ -334,23 +321,8 @@ fn render_texture(
(gles.glUniform1i)(prog.tex, 0);
let texcoord = [
src.top_right.x,
src.top_right.y,
src.top_left.x,
src.top_left.y,
src.bottom_right.x,
src.bottom_right.y,
src.bottom_left.x,
src.bottom_left.y,
];
let pos = [
x2, y1, // top right
x1, y1, // top left
x2, y2, // bottom right
x1, y2, // bottom left
];
let texcoord = src.to_points();
let pos = target_rect.to_points();
(gles.glVertexAttribPointer)(
prog.texcoord as _,