Correctly handle texture layer FB attachemnts in DCE.

 - in `glCopyImageSubData` the `srcZ` and `dstZ` attribute signal the
   texture layers read and written.
 - in the various framebuffer texture attachment calls, which layer is
   attached to the framebuffer is well defined.

gapis/api/gles/dependency_graph_behaviour_provider.go

@@ -198,24 +198,44 @@ func (*GlesDependencyGraphBehaviourProvider) GetBehaviourForCommand(
 			switch cmd := cmd.(type) {
 			case *GlCopyImageSubData:
 				// TODO: This assumes whole-image copy.  Handle sub-range copies.
-				// TODO: This does not handle multiple layers well.
 				if cmd.SrcTarget() == GLenum_GL_RENDERBUFFER {
 					b.Read(g, renderbufferDataKey{c.Objects().Renderbuffers().Get(RenderbufferId(cmd.SrcName()))})
 				} else {
-					data, size := c.Objects().Textures().Get(TextureId(cmd.SrcName())).dataAndSize(cmd.SrcLevel(), 0)
-					b.Read(g, data)
-					b.Read(g, size)
+					for layer := GLsizei(0); layer < cmd.SrcDepth(); layer++ {
+						data, size := c.Objects().Textures().Get(TextureId(cmd.SrcName())).dataAndSize(cmd.SrcLevel(), GLint(layer)+cmd.SrcZ())
+						b.Read(g, data)
+						b.Read(g, size)
+					}
 				}
 				if cmd.DstTarget() == GLenum_GL_RENDERBUFFER {
 					b.Write(g,
 						renderbufferDataKey{c.Objects().Renderbuffers().Get(RenderbufferId(cmd.DstName()))})
 				} else {
-					data, size := c.Objects().Textures().Get(TextureId(cmd.DstName())).dataAndSize(cmd.DstLevel(), 0)
-					b.Write(g, data)
-					b.Write(g, size)
+					for layer := GLsizei(0); layer < cmd.SrcDepth(); layer++ {
+						data, size := c.Objects().Textures().Get(TextureId(cmd.DstName())).dataAndSize(cmd.DstLevel(), GLint(layer)+cmd.DstZ())
+						b.Write(g, data)
+						b.Write(g, size)
+					}
 				}
 			case *GlFramebufferTexture2D:
-				b.Read(g, textureSizeKey{c.Objects().Textures().Get(cmd.Texture()), cmd.Texture(), cmd.Level(), 0})
+				var layer GLint
+				switch target := cmd.TextureTarget(); target {
+				case GLenum_GL_TEXTURE_CUBE_MAP_POSITIVE_X, GLenum_GL_TEXTURE_CUBE_MAP_NEGATIVE_X,
+					GLenum_GL_TEXTURE_CUBE_MAP_POSITIVE_Y, GLenum_GL_TEXTURE_CUBE_MAP_NEGATIVE_Y,
+					GLenum_GL_TEXTURE_CUBE_MAP_POSITIVE_Z, GLenum_GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:
+					layer = GLint(target - GLenum_GL_TEXTURE_CUBE_MAP_POSITIVE_X)
+				}
+				b.Read(g, textureSizeKey{c.Objects().Textures().Get(cmd.Texture()), cmd.Texture(), cmd.Level(), layer})
+				b.KeepAlive = true // Changes untracked state
+			case *GlFramebufferTexture:
+				if t := c.Objects().Textures().Get(cmd.Texture()); !t.IsNil() {
+					for layer := range t.Levels().Get(cmd.Level()).Layers().All() {
+						b.Read(g, textureSizeKey{t, cmd.Texture(), cmd.Level(), layer})
+					}
+				}
+				b.KeepAlive = true // Changes untracked state
+			case *GlFramebufferTextureLayer:
+				b.Read(g, textureSizeKey{c.Objects().Textures().Get(cmd.Texture()), cmd.Texture(), cmd.Level(), cmd.Layer()})
 				b.KeepAlive = true // Changes untracked state
 			case *GlCompressedTexImage2D:
 				texData, texSize := getTextureDataAndSize(ctx, cmd, id, s, c.Bound().TextureUnit(), cmd.Target(), cmd.Level())