add decal tilemode to shaders

Plenty more to follow-up:
- gradients
- gpu impl

Bug: skia:7638
Change-Id: I8e54fd0e24921f040f178c793b36c7fb855b136e
Reviewed-on: https://skia-review.googlesource.com/107420
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
Reviewed-by: Mike Klein <mtklein@chromium.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/src/core/SkBitmapProcState_matrixProcs.cpp b/src/core/SkBitmapProcState_matrixProcs.cpp
index ea28318f90..f9e3c82a00 100644
--- a/src/core/SkBitmapProcState_matrixProcs.cpp
+++ b/src/core/SkBitmapProcState_matrixProcs.cpp
@@ -445,6 +445,9 @@ SkBitmapProcState::MatrixProc SkBitmapProcState::chooseMatrixProc(bool trivial_m
                 return repeatx_nofilter_trans;
             case SkShader::kMirror_TileMode:
                 return mirrorx_nofilter_trans;
+            case SkShader::kDecal_TileMode:
+                SkASSERT(false);    // should never get here, handled by stages
+                return clampx_nofilter_trans;
         }
     }