[gles] Handle cubemap copies (#2725)

wgpu-hal/src/gles/command.rs

@@ -327,6 +327,7 @@ impl crate::CommandEncoder<super::Api> for super::CommandEncoder {
                 dst: dst_raw,
                 dst_target,
                 copy,
+                dst_is_cubemap: dst.is_cubemap,
             })
         }
     }

wgpu-hal/src/gles/device.rs

@@ -528,7 +528,7 @@ impl crate::Device<super::Api> for super::Device {
             depth: 1,
         };
 
-        let inner = if render_usage.contains(desc.usage)
+        let (inner, is_cubemap) = if render_usage.contains(desc.usage)
             && desc.dimension == wgt::TextureDimension::D2
             && desc.size.depth_or_array_layers == 1
         {
@@ -559,10 +559,10 @@ impl crate::Device<super::Api> for super::Device {
             }
 
             gl.bind_renderbuffer(glow::RENDERBUFFER, None);
-            super::TextureInner::Renderbuffer { raw }
+            (super::TextureInner::Renderbuffer { raw }, false)
         } else {
             let raw = gl.create_texture().unwrap();
-            let (target, is_3d) = match desc.dimension {
+            let (target, is_3d, is_cubemap) = match desc.dimension {
                 wgt::TextureDimension::D1 | wgt::TextureDimension::D2 => {
                     if desc.size.depth_or_array_layers > 1 {
                         //HACK: detect a cube map
@@ -575,17 +575,17 @@ impl crate::Device<super::Api> for super::Device {
                             None
                         };
                         match cube_count {
-                            None => (glow::TEXTURE_2D_ARRAY, true),
-                            Some(1) => (glow::TEXTURE_CUBE_MAP, false),
-                            Some(_) => (glow::TEXTURE_CUBE_MAP_ARRAY, true),
+                            None => (glow::TEXTURE_2D_ARRAY, true, false),
+                            Some(1) => (glow::TEXTURE_CUBE_MAP, false, true),
+                            Some(_) => (glow::TEXTURE_CUBE_MAP_ARRAY, true, true),
                         }
                     } else {
-                        (glow::TEXTURE_2D, false)
+                        (glow::TEXTURE_2D, false, false)
                     }
                 }
                 wgt::TextureDimension::D3 => {
                     copy_size.depth = desc.size.depth_or_array_layers;
-                    (glow::TEXTURE_3D, true)
+                    (glow::TEXTURE_3D, true, false)
                 }
             };
 
@@ -639,7 +639,7 @@ impl crate::Device<super::Api> for super::Device {
             }
 
             gl.bind_texture(target, None);
-            super::TextureInner::Texture { raw, target }
+            (super::TextureInner::Texture { raw, target }, is_cubemap)
         };
 
         Ok(super::Texture {
@@ -653,6 +653,7 @@ impl crate::Device<super::Api> for super::Device {
             format: desc.format,
             format_desc,
             copy_size,
+            is_cubemap,
         })
     }
     unsafe fn destroy_texture(&self, texture: super::Texture) {

wgpu-hal/src/gles/egl.rs

@@ -1210,6 +1210,7 @@ impl crate::Surface<super::Api> for Surface {
                 height: sc.extent.height,
                 depth: 1,
             },
+            is_cubemap: false,
         };
         Ok(Some(crate::AcquiredSurfaceTexture {
             texture,

wgpu-hal/src/gles/mod.rs

@@ -262,6 +262,7 @@ pub struct Texture {
     #[allow(unused)]
     format_desc: TextureFormatDesc,
     copy_size: crate::CopyExtent,
+    is_cubemap: bool,
 }
 
 impl Texture {
@@ -281,6 +282,7 @@ impl Texture {
                 height: 0,
                 depth: 0,
             },
+            is_cubemap: false,
         }
     }
 }
@@ -616,6 +618,7 @@ enum Command {
         dst: glow::Texture,
         dst_target: BindTarget,
         copy: crate::TextureCopy,
+        dst_is_cubemap: bool,
     },
     CopyBufferToTexture {
         src: Buffer,

wgpu-hal/src/gles/queue.rs

@@ -308,10 +308,10 @@ impl super::Queue {
                 src_target,
                 dst,
                 dst_target,
+                dst_is_cubemap,
                 ref copy,
             } => {
                 //TODO: handle 3D copies
-                //TODO: handle cubemap copies
                 gl.bind_framebuffer(glow::READ_FRAMEBUFFER, Some(self.copy_fbo));
                 if is_layered_target(src_target) {
                     //TODO: handle GLES without framebuffer_texture_3d
@@ -333,7 +333,18 @@ impl super::Queue {
                 }
 
                 gl.bind_texture(dst_target, Some(dst));
-                if is_layered_target(dst_target) {
+                if dst_is_cubemap {
+                    gl.copy_tex_sub_image_2d(
+                        CUBEMAP_FACES[copy.dst_base.array_layer as usize],
+                        copy.dst_base.mip_level as i32,
+                        copy.dst_base.origin.x as i32,
+                        copy.dst_base.origin.y as i32,
+                        copy.src_base.origin.x as i32,
+                        copy.src_base.origin.y as i32,
+                        copy.size.width as i32,
+                        copy.size.height as i32,
+                    );
+                } else if is_layered_target(dst_target) {
                     gl.copy_tex_sub_image_3d(
                         dst_target,
                         copy.dst_base.mip_level as i32,

wgpu-hal/src/gles/web.rs

@@ -270,6 +270,7 @@ impl crate::Surface<super::Api> for Surface {
                 height: sc.extent.height,
                 depth: 1,
             },
+            is_cubemap: false,
         };
         Ok(Some(crate::AcquiredSurfaceTexture {
             texture,