vulkan: rewrite top of loader

The top is responsible for layer discovery and chaining, and the bottom is
like a regular layer that is always enabled and is inserted just before
the driver.  Make the separation clear by rewriting the top and stripping
the layer managment code from loader.cpp.

Change-Id: I64e525e27bd4c297bccd94a1eb9b88e28088e85d
diff --git a/vulkan/libvulkan/api_gen.h b/vulkan/libvulkan/api_gen.h
new file mode 100644
index 0000000..54be83b
--- /dev/null
+++ b/vulkan/libvulkan/api_gen.h
@@ -0,0 +1,188 @@
+/*
+ * Copyright 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// WARNING: This file is generated. See ../README.md for instructions.
+
+#ifndef LIBVULKAN_API_GEN_H
+#define LIBVULKAN_API_GEN_H
+
+#include <vulkan/vulkan.h>
+
+namespace vulkan {
+namespace api {
+
+struct InstanceDispatchTable {
+    // clang-format off
+    PFN_vkDestroyInstance DestroyInstance;
+    PFN_vkEnumeratePhysicalDevices EnumeratePhysicalDevices;
+    PFN_vkGetInstanceProcAddr GetInstanceProcAddr;
+    PFN_vkGetPhysicalDeviceProperties GetPhysicalDeviceProperties;
+    PFN_vkGetPhysicalDeviceQueueFamilyProperties GetPhysicalDeviceQueueFamilyProperties;
+    PFN_vkGetPhysicalDeviceMemoryProperties GetPhysicalDeviceMemoryProperties;
+    PFN_vkGetPhysicalDeviceFeatures GetPhysicalDeviceFeatures;
+    PFN_vkGetPhysicalDeviceFormatProperties GetPhysicalDeviceFormatProperties;
+    PFN_vkGetPhysicalDeviceImageFormatProperties GetPhysicalDeviceImageFormatProperties;
+    PFN_vkCreateDevice CreateDevice;
+    PFN_vkEnumerateDeviceLayerProperties EnumerateDeviceLayerProperties;
+    PFN_vkEnumerateDeviceExtensionProperties EnumerateDeviceExtensionProperties;
+    PFN_vkGetPhysicalDeviceSparseImageFormatProperties GetPhysicalDeviceSparseImageFormatProperties;
+    PFN_vkDestroySurfaceKHR DestroySurfaceKHR;
+    PFN_vkGetPhysicalDeviceSurfaceSupportKHR GetPhysicalDeviceSurfaceSupportKHR;
+    PFN_vkGetPhysicalDeviceSurfaceCapabilitiesKHR GetPhysicalDeviceSurfaceCapabilitiesKHR;
+    PFN_vkGetPhysicalDeviceSurfaceFormatsKHR GetPhysicalDeviceSurfaceFormatsKHR;
+    PFN_vkGetPhysicalDeviceSurfacePresentModesKHR GetPhysicalDeviceSurfacePresentModesKHR;
+    PFN_vkCreateAndroidSurfaceKHR CreateAndroidSurfaceKHR;
+    // clang-format on
+};
+
+struct DeviceDispatchTable {
+    // clang-format off
+    PFN_vkGetDeviceProcAddr GetDeviceProcAddr;
+    PFN_vkDestroyDevice DestroyDevice;
+    PFN_vkGetDeviceQueue GetDeviceQueue;
+    PFN_vkQueueSubmit QueueSubmit;
+    PFN_vkQueueWaitIdle QueueWaitIdle;
+    PFN_vkDeviceWaitIdle DeviceWaitIdle;
+    PFN_vkAllocateMemory AllocateMemory;
+    PFN_vkFreeMemory FreeMemory;
+    PFN_vkMapMemory MapMemory;
+    PFN_vkUnmapMemory UnmapMemory;
+    PFN_vkFlushMappedMemoryRanges FlushMappedMemoryRanges;
+    PFN_vkInvalidateMappedMemoryRanges InvalidateMappedMemoryRanges;
+    PFN_vkGetDeviceMemoryCommitment GetDeviceMemoryCommitment;
+    PFN_vkGetBufferMemoryRequirements GetBufferMemoryRequirements;
+    PFN_vkBindBufferMemory BindBufferMemory;
+    PFN_vkGetImageMemoryRequirements GetImageMemoryRequirements;
+    PFN_vkBindImageMemory BindImageMemory;
+    PFN_vkGetImageSparseMemoryRequirements GetImageSparseMemoryRequirements;
+    PFN_vkQueueBindSparse QueueBindSparse;
+    PFN_vkCreateFence CreateFence;
+    PFN_vkDestroyFence DestroyFence;
+    PFN_vkResetFences ResetFences;
+    PFN_vkGetFenceStatus GetFenceStatus;
+    PFN_vkWaitForFences WaitForFences;
+    PFN_vkCreateSemaphore CreateSemaphore;
+    PFN_vkDestroySemaphore DestroySemaphore;
+    PFN_vkCreateEvent CreateEvent;
+    PFN_vkDestroyEvent DestroyEvent;
+    PFN_vkGetEventStatus GetEventStatus;
+    PFN_vkSetEvent SetEvent;
+    PFN_vkResetEvent ResetEvent;
+    PFN_vkCreateQueryPool CreateQueryPool;
+    PFN_vkDestroyQueryPool DestroyQueryPool;
+    PFN_vkGetQueryPoolResults GetQueryPoolResults;
+    PFN_vkCreateBuffer CreateBuffer;
+    PFN_vkDestroyBuffer DestroyBuffer;
+    PFN_vkCreateBufferView CreateBufferView;
+    PFN_vkDestroyBufferView DestroyBufferView;
+    PFN_vkCreateImage CreateImage;
+    PFN_vkDestroyImage DestroyImage;
+    PFN_vkGetImageSubresourceLayout GetImageSubresourceLayout;
+    PFN_vkCreateImageView CreateImageView;
+    PFN_vkDestroyImageView DestroyImageView;
+    PFN_vkCreateShaderModule CreateShaderModule;
+    PFN_vkDestroyShaderModule DestroyShaderModule;
+    PFN_vkCreatePipelineCache CreatePipelineCache;
+    PFN_vkDestroyPipelineCache DestroyPipelineCache;
+    PFN_vkGetPipelineCacheData GetPipelineCacheData;
+    PFN_vkMergePipelineCaches MergePipelineCaches;
+    PFN_vkCreateGraphicsPipelines CreateGraphicsPipelines;
+    PFN_vkCreateComputePipelines CreateComputePipelines;
+    PFN_vkDestroyPipeline DestroyPipeline;
+    PFN_vkCreatePipelineLayout CreatePipelineLayout;
+    PFN_vkDestroyPipelineLayout DestroyPipelineLayout;
+    PFN_vkCreateSampler CreateSampler;
+    PFN_vkDestroySampler DestroySampler;
+    PFN_vkCreateDescriptorSetLayout CreateDescriptorSetLayout;
+    PFN_vkDestroyDescriptorSetLayout DestroyDescriptorSetLayout;
+    PFN_vkCreateDescriptorPool CreateDescriptorPool;
+    PFN_vkDestroyDescriptorPool DestroyDescriptorPool;
+    PFN_vkResetDescriptorPool ResetDescriptorPool;
+    PFN_vkAllocateDescriptorSets AllocateDescriptorSets;
+    PFN_vkFreeDescriptorSets FreeDescriptorSets;
+    PFN_vkUpdateDescriptorSets UpdateDescriptorSets;
+    PFN_vkCreateFramebuffer CreateFramebuffer;
+    PFN_vkDestroyFramebuffer DestroyFramebuffer;
+    PFN_vkCreateRenderPass CreateRenderPass;
+    PFN_vkDestroyRenderPass DestroyRenderPass;
+    PFN_vkGetRenderAreaGranularity GetRenderAreaGranularity;
+    PFN_vkCreateCommandPool CreateCommandPool;
+    PFN_vkDestroyCommandPool DestroyCommandPool;
+    PFN_vkResetCommandPool ResetCommandPool;
+    PFN_vkAllocateCommandBuffers AllocateCommandBuffers;
+    PFN_vkFreeCommandBuffers FreeCommandBuffers;
+    PFN_vkBeginCommandBuffer BeginCommandBuffer;
+    PFN_vkEndCommandBuffer EndCommandBuffer;
+    PFN_vkResetCommandBuffer ResetCommandBuffer;
+    PFN_vkCmdBindPipeline CmdBindPipeline;
+    PFN_vkCmdSetViewport CmdSetViewport;
+    PFN_vkCmdSetScissor CmdSetScissor;
+    PFN_vkCmdSetLineWidth CmdSetLineWidth;
+    PFN_vkCmdSetDepthBias CmdSetDepthBias;
+    PFN_vkCmdSetBlendConstants CmdSetBlendConstants;
+    PFN_vkCmdSetDepthBounds CmdSetDepthBounds;
+    PFN_vkCmdSetStencilCompareMask CmdSetStencilCompareMask;
+    PFN_vkCmdSetStencilWriteMask CmdSetStencilWriteMask;
+    PFN_vkCmdSetStencilReference CmdSetStencilReference;
+    PFN_vkCmdBindDescriptorSets CmdBindDescriptorSets;
+    PFN_vkCmdBindIndexBuffer CmdBindIndexBuffer;
+    PFN_vkCmdBindVertexBuffers CmdBindVertexBuffers;
+    PFN_vkCmdDraw CmdDraw;
+    PFN_vkCmdDrawIndexed CmdDrawIndexed;
+    PFN_vkCmdDrawIndirect CmdDrawIndirect;
+    PFN_vkCmdDrawIndexedIndirect CmdDrawIndexedIndirect;
+    PFN_vkCmdDispatch CmdDispatch;
+    PFN_vkCmdDispatchIndirect CmdDispatchIndirect;
+    PFN_vkCmdCopyBuffer CmdCopyBuffer;
+    PFN_vkCmdCopyImage CmdCopyImage;
+    PFN_vkCmdBlitImage CmdBlitImage;
+    PFN_vkCmdCopyBufferToImage CmdCopyBufferToImage;
+    PFN_vkCmdCopyImageToBuffer CmdCopyImageToBuffer;
+    PFN_vkCmdUpdateBuffer CmdUpdateBuffer;
+    PFN_vkCmdFillBuffer CmdFillBuffer;
+    PFN_vkCmdClearColorImage CmdClearColorImage;
+    PFN_vkCmdClearDepthStencilImage CmdClearDepthStencilImage;
+    PFN_vkCmdClearAttachments CmdClearAttachments;
+    PFN_vkCmdResolveImage CmdResolveImage;
+    PFN_vkCmdSetEvent CmdSetEvent;
+    PFN_vkCmdResetEvent CmdResetEvent;
+    PFN_vkCmdWaitEvents CmdWaitEvents;
+    PFN_vkCmdPipelineBarrier CmdPipelineBarrier;
+    PFN_vkCmdBeginQuery CmdBeginQuery;
+    PFN_vkCmdEndQuery CmdEndQuery;
+    PFN_vkCmdResetQueryPool CmdResetQueryPool;
+    PFN_vkCmdWriteTimestamp CmdWriteTimestamp;
+    PFN_vkCmdCopyQueryPoolResults CmdCopyQueryPoolResults;
+    PFN_vkCmdPushConstants CmdPushConstants;
+    PFN_vkCmdBeginRenderPass CmdBeginRenderPass;
+    PFN_vkCmdNextSubpass CmdNextSubpass;
+    PFN_vkCmdEndRenderPass CmdEndRenderPass;
+    PFN_vkCmdExecuteCommands CmdExecuteCommands;
+    PFN_vkCreateSwapchainKHR CreateSwapchainKHR;
+    PFN_vkDestroySwapchainKHR DestroySwapchainKHR;
+    PFN_vkGetSwapchainImagesKHR GetSwapchainImagesKHR;
+    PFN_vkAcquireNextImageKHR AcquireNextImageKHR;
+    PFN_vkQueuePresentKHR QueuePresentKHR;
+    // clang-format on
+};
+
+bool InitDispatchTable(VkInstance instance, PFN_vkGetInstanceProcAddr get_proc);
+bool InitDispatchTable(VkDevice dev, PFN_vkGetDeviceProcAddr get_proc);
+
+}  // namespace api
+}  // namespace vulkan
+
+#endif  // LIBVULKAN_API_GEN_H