ccpr: Prefer atlas sizes under 4k on ARM

Bug: skia:
Change-Id: Ib5afb84647efe2e64a3ec2f9da422b39228431e9
Reviewed-on: https://skia-review.googlesource.com/108871
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/src/gpu/gl/GrGLCaps.cpp b/src/gpu/gl/GrGLCaps.cpp
index d71194ed6f..3bdf5d0e60 100644
--- a/src/gpu/gl/GrGLCaps.cpp
+++ b/src/gpu/gl/GrGLCaps.cpp
@@ -483,6 +483,12 @@ void GrGLCaps::init(const GrContextOptions& contextOptions,
     // Our render targets are always created with textures as the color
     // attachment, hence this min:
     fMaxRenderTargetSize = SkTMin(fMaxTextureSize, fMaxRenderTargetSize);
+    fMaxPreferredRenderTargetSize = fMaxRenderTargetSize;
+
+    if (kARM_GrGLVendor == ctxInfo.vendor()) {
+        // On Mali G71, RT's above 4k have been observed to incur a performance cost.
+        fMaxPreferredRenderTargetSize = SkTMin(4096, fMaxPreferredRenderTargetSize);
+    }
 
     fGpuTracingSupport = ctxInfo.hasExtension("GL_EXT_debug_marker");