have shaders that need seed_shader call it themselves

This ought to make compose shader and our sprite blitter a bit more
efficient.  Compose shader can simply re-seed instead of saving the
xy values off to a buffer.  The sprite blitter doesn't need xy at all.

Change-Id: Ib4b3509288810f74a4c8e2978ce2ca14d8644980
Reviewed-on: https://skia-review.googlesource.com/18405
Reviewed-by: Herb Derby <herb@google.com>
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Klein <mtklein@chromium.org>

1 files changed, 5 insertions, 4 deletions

diff --git a/src/core/SkDraw_vertices.cpp b/src/core/SkDraw_vertices.cpp
index 6b6ba9c555..662a6ff187 100644
--- a/src/core/SkDraw_vertices.cpp
+++ b/src/core/SkDraw_vertices.cpp
@@ -86,15 +86,16 @@ protected:
     Context* onMakeContext(const ContextRec& rec, SkArenaAlloc* alloc) const override {
         return nullptr;
     }
-    bool onAppendStages(SkRasterPipeline* pipeine, SkColorSpace* dstCS, SkArenaAlloc* alloc,
+    bool onAppendStages(SkRasterPipeline* pipeline, SkColorSpace* dstCS, SkArenaAlloc* alloc,
                         const SkMatrix&, const SkPaint&, const SkMatrix*) const override {
-        pipeine->append(SkRasterPipeline::matrix_4x3, &fM43);
+        pipeline->append(SkRasterPipeline::seed_shader);
+        pipeline->append(SkRasterPipeline::matrix_4x3, &fM43);
         // In theory we should never need to clamp. However, either due to imprecision in our
         // matrix43, or the scan converter passing us pixel centers that in fact are not within
         // the triangle, we do see occasional (slightly) out-of-range values, so we add these
         // clamp stages. It would be nice to find a way to detect when these are not needed.
-        pipeine->append(SkRasterPipeline::clamp_0);
-        pipeine->append(SkRasterPipeline::clamp_a);
+        pipeline->append(SkRasterPipeline::clamp_0);
+        pipeline->append(SkRasterPipeline::clamp_a);
         return true;
     }