Generate path names on the client side

src/gpu/gl/GrGpuGL.cpp

Index: src/gpu/gl/GrGpuGL.cpp
diff --git a/src/gpu/gl/GrGpuGL.cpp b/src/gpu/gl/GrGpuGL.cpp
index ff53b9c14cdeb5e8e141899249399ed58bff55f7..b5b1686d79b516e7ad06d94168c448b3645e12b8 100644
--- a/src/gpu/gl/GrGpuGL.cpp
+++ b/src/gpu/gl/GrGpuGL.cpp
@@ -7,6 +7,7 @@
 
 
 #include "GrGpuGL.h"
+#include "GrGLNameAllocator.h"
 #include "GrGLStencilBuffer.h"
 #include "GrGLPath.h"
 #include "GrGLShaderBuilder.h"
@@ -2379,6 +2380,39 @@ void GrGpuGL::notifyTextureDelete(GrGLTexture* texture) {
     }
 }
 
+
+GrGLuint GrGpuGL::createGLPathObject() {
+    if (NULL == fPathNameAllocator.get()) {
+        static const int range = 65536;
+        GrGLuint firstName;
+        GL_CALL_RET(firstName, GenPaths(range));
+        fPathNameAllocator.reset(SkNEW_ARGS(GrGLNameAllocator, (firstName, firstName + range)));
+    }
+
+    GrGLuint name = fPathNameAllocator->allocateName();
+    if (0 == name) {
+        // Our reserved path names are all in use. Fall back on GenPaths.
+        GL_CALL_RET(name, GenPaths(1));
+    }
+
+    return name;
+}
+
+void GrGpuGL::deleteGLPathObject(GrGLuint name) {
+    if (NULL == fPathNameAllocator.get() ||
+        name < fPathNameAllocator->firstName() ||
+        name >= fPathNameAllocator->endName()) {
+        // If we aren't inside fPathNameAllocator's range then this name was
+        // generated by the GenPaths fallback (or else the name is unallocated).
+        GL_CALL(DeletePaths(name, 1));
+        return;
+    }
+
+    // Make the path empty to save memory, but don't free the name in the driver.
+    GL_CALL(PathCommands(name, 0, NULL, 0, GR_GL_FLOAT, NULL));
+    fPathNameAllocator->free(name);
+}
+
 bool GrGpuGL::configToGLFormats(GrPixelConfig config,
                                 bool getSizedInternalFormat,
                                 GrGLenum* internalFormat,