Add support for getting vulkan descriptor sets without a GrVkUniformHandler.

src/gpu/vk/GrVkResourceProvider.cpp

 /*
 * Copyright 2016 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
 
 #include "GrVkResourceProvider.h"
 
 #include "GrTextureParams.h"
@@ skipping 159 matching lines @@
            *handle = GrVkDescriptorSetManager::Handle(i);
            return;
         }
     }
 
     fDescriptorSetManagers.emplace_back(fGpu, VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
                                         &uniformHandler);
     *handle = GrVkDescriptorSetManager::Handle(fDescriptorSetManagers.count() - 1);
 }
 
+void GrVkResourceProvider::getSamplerDescriptorSetHandle(const SkTArray<uint32_t>& visibilities,
+                                                         GrVkDescriptorSetManager::Handle* handle) {
+    SkASSERT(handle);
+    for (int i = 0; i < fDescriptorSetManagers.count(); ++i) {
+        if (fDescriptorSetManagers[i].isCompatible(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
+                                                   visibilities)) {
+            *handle = GrVkDescriptorSetManager::Handle(i);
+            return;
+        }
+    }
+
+    fDescriptorSetManagers.emplace_back(fGpu, VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
+                                        visibilities);
+    *handle = GrVkDescriptorSetManager::Handle(fDescriptorSetManagers.count() - 1);
+}
+
 VkDescriptorSetLayout GrVkResourceProvider::getUniformDSLayout() const {
     SkASSERT(fUniformDSHandle.isValid());
     return fDescriptorSetManagers[fUniformDSHandle.toIndex()].layout();
 }
 
 VkDescriptorSetLayout GrVkResourceProvider::getSamplerDSLayout(
         const GrVkDescriptorSetManager::Handle& handle) const {
     SkASSERT(handle.isValid());
     return fDescriptorSetManagers[handle.toIndex()].layout();
 }
@@ skipping 236 matching lines @@
 }
 
 void GrVkResourceProvider::CompatibleRenderPassSet::abandonResources() {
     for (int i = 0; i < fRenderPasses.count(); ++i) {
         if (fRenderPasses[i]) {
             fRenderPasses[i]->unrefAndAbandon();
             fRenderPasses[i] = nullptr;
         }
     }
 }