Set up cache in vulkan to reuse GrVkPrograms (aka VkPipelines)

src/gpu/vk/GrVkPipeline.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 "GrVkPipeline.h"
 
 #include "GrGeometryProcessor.h"
@@ skipping 461 matching lines @@
         return nullptr;
     }
 
     return new GrVkPipeline(vkPipeline);
 }
 
 void GrVkPipeline::freeGPUData(const GrVkGpu* gpu) const {
     GR_VK_CALL(gpu->vkInterface(), DestroyPipeline(gpu->device(), fPipeline, nullptr));
 }
 
-
 void set_dynamic_scissor_state(GrVkGpu* gpu,
                                GrVkCommandBuffer* cmdBuffer,
                                const GrPipeline& pipeline,
                                const GrRenderTarget& target) {
     // We always use one scissor and if it is disabled we just make it the size of the RT
     const GrScissorState& scissorState = pipeline.getScissorState();
     VkRect2D scissor;
     if (scissorState.enabled() &&
         !scissorState.rect().contains(0, 0, target.width(), target.height())) {
         // This all assumes the scissorState has previously been clipped to the device space render
@@ skipping 44 matching lines @@
     GrBlendCoeff dstCoeff = blendInfo.fDstBlend;
     float floatColors[4];
     if (blend_coeff_refs_constant(srcCoeff) || blend_coeff_refs_constant(dstCoeff)) {
         GrColorToRGBAFloat(blendInfo.fBlendConstant, floatColors);
     } else {
         memset(floatColors, 0, 4 * sizeof(float));
     }
     cmdBuffer->setBlendConstants(gpu, floatColors);
 }
 
-
-                                          
 void GrVkPipeline::SetDynamicState(GrVkGpu* gpu,
                                    GrVkCommandBuffer* cmdBuffer,
                                    const GrPipeline& pipeline) {
     const GrRenderTarget& target = *pipeline.getRenderTarget();
     set_dynamic_scissor_state(gpu, cmdBuffer, pipeline, target);
     set_dynamic_viewport_state(gpu, cmdBuffer, target);
     set_dynamic_blend_constant_state(gpu, cmdBuffer, pipeline);
 }