commit b1e913801502c7380d68d0101e4399f4550f4dc3
author Jiawei Shao <jiawei.shao@intel.com> Thu May 17 14:33:55 2018 +0800
committer Commit Bot <commit-bot@chromium.org> Wed May 23 01:13:40 2018 +0000
tree 77d9209137f5bd5d9d72b5e7a38171dd5818518f
parent 9b1462a06df37d09dc3c2efa674e125d6bfff26b

ES31: Implement EXT_geometry_shader framebuffer default layers on OpenGL

This patch implements FRAMEBUFFER_DEFAULT_LAYERS_EXT as a legal framebuffer
parameter required in OpenGL ES 3.1 extension EXT_geometry_shader on OpenGL
back-ends.

The query on FRAMEBUFFER_DEFAULT_LAYERS_EXT specifies the layer count used
when the framebuffer has no attachments.

BUG=angleproject:1941
TEST=dEQP-GLES31.functional.geometry_shading.query.framebuffer_default_layers

Change-Id: I888465dfe23da53541ec2fedb8616027df532466
Reviewed-on: https://chromium-review.googlesource.com/1063560
Reviewed-by: Jiajia Qin <jiajia.qin@intel.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Jiawei Shao <jiawei.shao@intel.com>

src/libANGLE/renderer/gl/FramebufferGL.cpp

diff --git a/src/libANGLE/renderer/gl/FramebufferGL.cpp b/src/libANGLE/renderer/gl/FramebufferGL.cpp
index 0132033..304bb19 100644
--- a/src/libANGLE/renderer/gl/FramebufferGL.cpp
+++ b/src/libANGLE/renderer/gl/FramebufferGL.cpp
@@ -689,6 +689,10 @@
                     GL_FRAMEBUFFER, GL_FRAMEBUFFER_DEFAULT_FIXED_SAMPLE_LOCATIONS,
                     gl::ConvertToGLBoolean(mState.getDefaultFixedSampleLocations()));
                 break;
+            case Framebuffer::DIRTY_BIT_DEFAULT_LAYERS:
+                functions->framebufferParameteri(GL_FRAMEBUFFER, GL_FRAMEBUFFER_DEFAULT_LAYERS_EXT,
+                                                 mState.getDefaultLayers());
+                break;
             default:
             {
                 ASSERT(Framebuffer::DIRTY_BIT_COLOR_ATTACHMENT_0 == 0 &&