Lower max_color_attachments limit for GL to 4

Author: adrian17

wgpu-types/src/lib.rs

@@ -1321,7 +1321,7 @@ impl Limits {
     ///     min_uniform_buffer_offset_alignment: 256,
     ///     min_storage_buffer_offset_alignment: 256,
     ///     max_inter_stage_shader_components: 60,
-    ///     max_color_attachments: 8,
+    ///     max_color_attachments: 4,
     ///     max_color_attachment_bytes_per_sample: 32,
     ///     max_compute_workgroup_storage_size: 16352, // *
     ///     max_compute_invocations_per_workgroup: 256,
@@ -1341,6 +1341,7 @@ impl Limits {
             max_texture_dimension_3d: 256,
             max_storage_buffers_per_shader_stage: 4,
             max_uniform_buffer_binding_size: 16 << 10, // (16 KiB)
+            max_color_attachments: 4,
             // see: https://developer.apple.com/metal/Metal-Feature-Set-Tables.pdf#page=7
             max_compute_workgroup_storage_size: 16352,
             ..Self::defaults()
@@ -1378,7 +1379,7 @@ impl Limits {
     ///     min_uniform_buffer_offset_alignment: 256,
     ///     min_storage_buffer_offset_alignment: 256,
     ///     max_inter_stage_shader_components: 31,
-    ///     max_color_attachments: 8,
+    ///     max_color_attachments: 4,
     ///     max_color_attachment_bytes_per_sample: 32,
     ///     max_compute_workgroup_storage_size: 0, // +
     ///     max_compute_invocations_per_workgroup: 0, // +