Add support for instanced draws

Adds an instance buffer to GrMesh and instance attribs to
GrPrimitiveProcessor. Implements support in GL and Vulkan. Adds unit
tests for instanced rendering with GrMesh.

Bug: skia:
Change-Id: If1a9920feb9366f346b8c37cf914713c49129b3a
Reviewed-on: https://skia-review.googlesource.com/16200
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>

1 files changed, 0 insertions, 17 deletions

diff --git a/src/gpu/GrGeometryProcessor.h b/src/gpu/GrGeometryProcessor.h
index e5222bf80a..086d9baa53 100644
--- a/src/gpu/GrGeometryProcessor.h
+++ b/src/gpu/GrGeometryProcessor.h
@@ -40,23 +40,6 @@ public:
     }
 
 protected:
-    /**
-     * Subclasses call this from their constructor to register vertex attributes.  Attributes
-     * will be padded to the nearest 4 bytes for performance reasons.
-     * TODO After deferred geometry, we should do all of this inline in GenerateGeometry alongside
-     * the struct used to actually populate the attributes.  This is all extremely fragile, vertex
-     * attributes have to be added in the order they will appear in the struct which maps memory.
-     * The processor key should reflect the vertex attributes, or there lack thereof in the
-     * GrGeometryProcessor.
-     */
-    const Attribute& addVertexAttrib(const char* name, GrVertexAttribType type,
-                                     GrSLPrecision precision = kDefault_GrSLPrecision) {
-        precision = (kDefault_GrSLPrecision == precision) ? kMedium_GrSLPrecision : precision;
-        fAttribs.emplace_back(name, type, precision);
-        fVertexStride += fAttribs.back().fOffset;
-        return fAttribs.back();
-    }
-
     void setWillUseGeoShader() { fWillUseGeoShader = true; }
 
     /**