From 9a5dec2cf09ab39bdeb55af2f665f683d09c82f3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mariusz=20Kry=C5=84ski?= <mrk@sed.pl>
Date: Tue, 9 Nov 2021 15:32:40 +0100
Subject: [PATCH] gles backend: unbind PIXEL_UNPACK_BUFFER (#2162)

---
 wgpu-hal/src/gles/queue.rs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/wgpu-hal/src/gles/queue.rs b/wgpu-hal/src/gles/queue.rs
index 9de5be570e..9652a33325 100644
--- a/wgpu-hal/src/gles/queue.rs
+++ b/wgpu-hal/src/gles/queue.rs
@@ -371,11 +371,13 @@ impl super::Queue {
                 gl.bind_texture(dst_target, Some(dst));
                 gl.pixel_store_i32(glow::UNPACK_ROW_LENGTH, row_texels as i32);
                 gl.pixel_store_i32(glow::UNPACK_IMAGE_HEIGHT, column_texels as i32);
+                let mut unbind_unpack_buffer = false;
                 if format_info.block_dimensions == (1, 1) {
                     let buffer_data;
                     let unpack_data = match *src {
                         super::BufferInner::Buffer(buffer) => {
                             gl.bind_buffer(glow::PIXEL_UNPACK_BUFFER, Some(buffer));
+                            unbind_unpack_buffer = true;
                             glow::PixelUnpackData::BufferOffset(copy.buffer_layout.offset as u32)
                         }
                         super::BufferInner::Data(ref data) => {
@@ -455,6 +457,7 @@ impl super::Queue {
                     let unpack_data = match *src {
                         super::BufferInner::Buffer(buffer) => {
                             gl.bind_buffer(glow::PIXEL_UNPACK_BUFFER, Some(buffer));
+                            unbind_unpack_buffer = true;
                             glow::CompressedPixelUnpackData::BufferRange(
                                 offset..offset + bytes_per_image,
                             )
@@ -523,6 +526,9 @@ impl super::Queue {
                         _ => unreachable!(),
                     }
                 }
+                if unbind_unpack_buffer {
+                    gl.bind_buffer(glow::PIXEL_UNPACK_BUFFER, None);
+                }
             }
             C::CopyTextureToBuffer {
                 src,