commit 9d2049db6e4332d0c35e00b1d7fb075a839205a1
author bsalomon <bsalomon@google.com> Tue Mar 17 12:06:19 2015 -0700
committer Commit bot <commit-bot@chromium.org> Tue Mar 17 12:06:19 2015 -0700
tree 5023a6d4f674cea9f91bde8ab75c6a4eb50cd685
parent eec84e324ee47f19b7e9c22d3454622d7a21da2e

Add stencil-only clear bug workaround back but for all devices.

TBR=robertphillips@google.com

Review URL: https://codereview.chromium.org/1010253002

src/gpu/gl/GrGLGpu.cpp

diff --git a/src/gpu/gl/GrGLGpu.cpp b/src/gpu/gl/GrGLGpu.cpp
index 0793d7b..34ceb06 100644
--- a/src/gpu/gl/GrGLGpu.cpp
+++ b/src/gpu/gl/GrGLGpu.cpp
@@ -1203,8 +1203,23 @@
                 }
 
                 GL_CALL(ClearStencil(0));
+                // Many GL implementations seem to have trouble with clearing an FBO with only
+                // a stencil buffer.
+                GrGLuint tempRB;
+                GL_CALL(GenRenderbuffers(1, &tempRB));
+                GL_CALL(BindRenderbuffer(GR_GL_RENDERBUFFER, tempRB));
+                GL_CALL(RenderbufferStorage(GR_GL_RENDERBUFFER, GR_GL_RGBA8, width, height));
+                GL_CALL(FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
+                                                GR_GL_COLOR_ATTACHMENT0,
+                                                GR_GL_RENDERBUFFER, tempRB));
+
                 GL_CALL(Clear(GR_GL_STENCIL_BUFFER_BIT));
 
+                GL_CALL(FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
+                                                GR_GL_COLOR_ATTACHMENT0,
+                                                GR_GL_RENDERBUFFER, 0));
+                GL_CALL(DeleteRenderbuffers(1, &tempRB));
+
                 // Unbind the SB from the FBO so that we don't keep it alive.
                 GL_CALL(FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
                                                 GR_GL_STENCIL_ATTACHMENT,