fixup: Use more general clear_depth that will also work on GLES (servo#320)

* use generic clear_depth

Signed-off-by: sagudev <16504129+sagudev@users.noreply.github.com>

* glow 0.15

Signed-off-by: sagudev <16504129+sagudev@users.noreply.github.com>

---------

Signed-off-by: sagudev <16504129+sagudev@users.noreply.github.com>

Author: sagudev

Cargo.toml

@@ -37,7 +37,7 @@ euclid = "0.22"
 fnv = { version = "1.0", optional = true }
 libc = "0.2"
 log = "0.4"
-glow = { version = "0.14.2", optional = true }
+glow = { version = "0.15", 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 }

src/chains.rs

@@ -402,7 +402,7 @@ impl<Device: DeviceAPI> SwapChainData<Device> {
         unsafe {
             gl.bind_framebuffer(gl::FRAMEBUFFER, fbo);
             gl.clear_color(color[0], color[1], color[2], color[3]);
-            gl.clear_depth_f64(1.);
+            gl.clear_depth(1.);
             gl.clear_stencil(0);
             gl.disable(gl::SCISSOR_TEST);
             gl.disable(gl::RASTERIZER_DISCARD);
@@ -435,7 +435,7 @@ impl<Device: DeviceAPI> SwapChainData<Device> {
                 clear_color[3],
             );
             gl.color_mask(color_mask[0], color_mask[1], color_mask[2], color_mask[3]);
-            gl.clear_depth_f64(clear_depth[0] as f64);
+            gl.clear_depth(clear_depth[0] as f64);
             gl.clear_stencil(clear_stencil[0]);
             gl.depth_mask(depth_mask);
             gl.stencil_mask(stencil_mask[0] as _);