Fall back to non mipped Texture when we can't copy base to mipped texture

TBR: bsalomon@google.com
Bug: skia:7094
Change-Id: I9d2ba78c4d4332a22e2357cde0598de51299067d
Reviewed-on: https://skia-review.googlesource.com/53541
Commit-Queue: Greg Daniel <egdaniel@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/src/gpu/gl/GrGLCaps.h b/src/gpu/gl/GrGLCaps.h
index 1ce6094a6b..68cbc9bf16 100644
--- a/src/gpu/gl/GrGLCaps.h
+++ b/src/gpu/gl/GrGLCaps.h
@@ -125,6 +125,15 @@ public:
             return SkToBool(fConfigTable[config].fFlags & ConfigInfo::kRenderable_Flag);
         }
     }
+
+    bool isConfigCopyable(GrPixelConfig config) const override {
+        // In GL we have three ways to be able to copy. CopyTexImage, blit, and draw. CopyTexImage
+        // requires the src to be an FBO attachment, blit requires both src and dst to be FBO
+        // attachments, and draw requires the dst to be an FBO attachment. Thus to copy from and to
+        // the same config, we need that config to be renderable so we can attach it to an FBO.
+        return this->isConfigRenderable(config, false);
+    }
+
     bool canConfigBeImageStorage(GrPixelConfig config) const override {
         return SkToBool(fConfigTable[config].fFlags & ConfigInfo::kCanUseAsImageStorage_Flag);
     }