From e489878c92aa93dd91b11f4da9a5acf9213918c4 Mon Sep 17 00:00:00 2001
From: sagudev <16504129+sagudev@users.noreply.github.com>
Date: Tue, 1 Oct 2024 12:31:02 +0200
Subject: [PATCH] WIP

Signed-off-by: sagudev <16504129+sagudev@users.noreply.github.com>
---
 Cargo.toml    |  2 +-
 src/chains.rs | 23 ++++++++++-------------
 2 files changed, 11 insertions(+), 14 deletions(-)

diff --git a/Cargo.toml b/Cargo.toml
index 201711a8..76faaf43 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -37,7 +37,7 @@ euclid = "0.22"
 fnv = { version = "1.0", optional = true }
 libc = "0.2"
 log = "0.4"
-glow = { version = "0.14", optional = true }
+glow = { git = "https://github.com/grovesNL/glow.git", optional = true }
 osmesa-sys = { version = "0.1", optional = true }
 rwh_05 = { package = "raw-window-handle", version = "0.5.2", features = ["std"], optional = true }
 rwh_06 = { package = "raw-window-handle", version = "0.6.2", features = ["std"], optional = true }
diff --git a/src/chains.rs b/src/chains.rs
index 3495577b..92486ac4 100644
--- a/src/chains.rs
+++ b/src/chains.rs
@@ -37,13 +37,9 @@ use std::mem;
 use std::num::NonZero;
 use std::sync::{Arc, Mutex, MutexGuard, RwLock, RwLockReadGuard, RwLockWriteGuard};
 
-fn framebuffer(framebuffer: u32) -> Option<gl::NativeFramebuffer> {
-    NonZero::new(framebuffer).map(gl::NativeFramebuffer)
-}
-
 impl crate::SurfaceInfo {
     fn framebuffer(&self) -> Option<gl::NativeFramebuffer> {
-        framebuffer(self.framebuffer_object)
+        NonZero::new(self.framebuffer_object).map(gl::NativeFramebuffer)
     }
 }
 
@@ -359,22 +355,23 @@ impl<Device: DeviceAPI> SwapChainData<Device> {
         self.validate_context(device, context)?;
 
         // Save the current GL state
-        let mut bound_fbos = [0, 0];
+        let draw_fbo;
+        let read_fbo;
         let mut clear_color = [0., 0., 0., 0.];
         let mut clear_depth = [0.];
         let mut clear_stencil = [0];
         let mut color_mask = [0, 0, 0, 0];
-        let mut depth_mask = [0];
+        let depth_mask;
         let mut stencil_mask = [0];
         let scissor_enabled = unsafe { gl.is_enabled(gl::SCISSOR_TEST) };
         let rasterizer_enabled = unsafe { gl.is_enabled(gl::RASTERIZER_DISCARD) };
         unsafe {
-            gl.get_parameter_i32_slice(gl::DRAW_FRAMEBUFFER_BINDING, &mut bound_fbos[0..]);
-            gl.get_parameter_i32_slice(gl::READ_FRAMEBUFFER_BINDING, &mut bound_fbos[1..]);
+            draw_fbo = gl.get_parameter_framebuffer(gl::DRAW_FRAMEBUFFER_BINDING);
+            read_fbo = gl.get_parameter_framebuffer(gl::READ_FRAMEBUFFER_BINDING);
             gl.get_parameter_f32_slice(gl::COLOR_CLEAR_VALUE, &mut clear_color[..]);
             gl.get_parameter_f32_slice(gl::DEPTH_CLEAR_VALUE, &mut clear_depth[..]);
             gl.get_parameter_i32_slice(gl::STENCIL_CLEAR_VALUE, &mut clear_stencil[..]);
-            gl.get_parameter_i32_slice(gl::DEPTH_WRITEMASK, &mut depth_mask[..]);
+            depth_mask = gl.get_parameter_bool(gl::DEPTH_WRITEMASK);
             gl.get_parameter_i32_slice(gl::STENCIL_WRITEMASK, &mut stencil_mask[..]);
             gl.get_parameter_i32_slice(gl::COLOR_WRITEMASK, &mut color_mask[..]);
         }
@@ -429,8 +426,8 @@ impl<Device: DeviceAPI> SwapChainData<Device> {
 
         // Restore the GL state
         unsafe {
-            gl.bind_framebuffer(gl::DRAW_FRAMEBUFFER, framebuffer(bound_fbos[0] as _));
-            gl.bind_framebuffer(gl::READ_FRAMEBUFFER, framebuffer(bound_fbos[1] as _));
+            gl.bind_framebuffer(gl::DRAW_FRAMEBUFFER, draw_fbo);
+            gl.bind_framebuffer(gl::READ_FRAMEBUFFER, read_fbo);
             gl.clear_color(
                 clear_color[0],
                 clear_color[1],
@@ -445,7 +442,7 @@ impl<Device: DeviceAPI> SwapChainData<Device> {
             );
             gl.clear_depth_f64(clear_depth[0] as f64);
             gl.clear_stencil(clear_stencil[0]);
-            gl.depth_mask(depth_mask[0] != 0);
+            gl.depth_mask(depth_mask);
             gl.stencil_mask(stencil_mask[0] as _);
             if scissor_enabled {
                 gl.enable(gl::SCISSOR_TEST);