/*------------------------------------------------------------------------
 * Vulkan Conformance Tests
 * ------------------------
 *
 * Copyright (c) 2016 The Khronos Group Inc.
 *
 * 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.
 *
 *//*!
 * \file
 * \brief VK_KHR_shader_draw_parameters tests
 *//*--------------------------------------------------------------------*/

#include "vktDrawShaderDrawParametersTests.hpp"

#include "vktTestCaseUtil.hpp"
#include "vktDrawTestCaseUtil.hpp"
#include "vktDrawBaseClass.hpp"

#include "vkQueryUtil.hpp"
#include "vkCmdUtil.hpp"

#include "tcuTestLog.hpp"
#include "tcuImageCompare.hpp"
#include "tcuTextureUtil.hpp"

namespace vkt
{
namespace Draw
{
namespace
{

enum TestFlagBits
{
	TEST_FLAG_INSTANCED			= 1u << 0,
	TEST_FLAG_INDEXED			= 1u << 1,
	TEST_FLAG_INDIRECT			= 1u << 2,
	TEST_FLAG_MULTIDRAW			= 1u << 3,	//!< multiDrawIndirect
	TEST_FLAG_FIRST_INSTANCE	= 1u << 4,	//!< drawIndirectFirstInstance
};
typedef deUint32 TestFlags;

struct FlagsTestSpec : public TestSpecBase
{
	TestFlags	flags;
};

inline FlagsTestSpec addFlags (FlagsTestSpec spec, const TestFlags flags)
{
	spec.flags |= flags;
	return spec;
}

enum Constants
{
	// \note Data layout in buffers (junk data and good data is intertwined).
	//       Values are largely arbitrary, but we try to avoid "nice" numbers to make sure the test doesn't pass by accident.
	NUM_VERTICES			= 4,	//!< number of consecutive good vertices
	NDX_FIRST_VERTEX		= 2,	//!< index of first good vertex data
	NDX_SECOND_VERTEX		= 9,	//!< index of second good vertex data
	NDX_FIRST_INDEX			= 11,	//!< index of a first good index (in index data)
	NDX_SECOND_INDEX		= 17,	//!< index of a second good index
	OFFSET_FIRST_INDEX		= 1,	//!< offset added to the first index
	OFFSET_SECOND_INDEX		= 4,	//!< offset added to the second index
	MAX_INSTANCE_COUNT		= 3,	//!< max number of draw instances
	MAX_INDIRECT_DRAW_COUNT	= 3,	//!< max drawCount of indirect calls
};

class DrawTest : public DrawTestsBaseClass
{
public:
	typedef FlagsTestSpec	TestSpec;
							DrawTest				(Context &context, TestSpec testSpec);
	tcu::TestStatus			iterate					(void);

private:
	template<typename T, std::size_t N>
	void					setIndirectCommand		(const T (&pCmdData)[N]);

	void					drawReferenceImage		(const tcu::PixelBufferAccess& refImage) const;

	bool					isInstanced				(void) const { return (m_flags & TEST_FLAG_INSTANCED)		!= 0; }
	bool					isIndexed				(void) const { return (m_flags & TEST_FLAG_INDEXED)			!= 0; }
	bool					isIndirect				(void) const { return (m_flags & TEST_FLAG_INDIRECT)		!= 0; }
	bool					isMultiDraw				(void) const { return (m_flags & TEST_FLAG_MULTIDRAW)		!= 0; }
	bool					isFirstInstance			(void) const { return (m_flags & TEST_FLAG_FIRST_INSTANCE)	!= 0; }

	const TestFlags			m_flags;
	de::SharedPtr<Buffer>	m_indexBuffer;
	de::SharedPtr<Buffer>	m_indirectBuffer;
};

DrawTest::DrawTest (Context &context, TestSpec testSpec)
	: DrawTestsBaseClass(context, testSpec.shaders[glu::SHADERTYPE_VERTEX], testSpec.shaders[glu::SHADERTYPE_FRAGMENT], testSpec.topology)
	, m_flags			(testSpec.flags)
{
	DE_ASSERT(m_topology == vk::VK_PRIMITIVE_TOPOLOGY_TRIANGLE_STRIP);
	DE_ASSERT(!isMultiDraw()     || isIndirect());
	DE_ASSERT(!isFirstInstance() || (isIndirect() && isInstanced()));

	// Vertex data
	{
		int refIndex = NDX_FIRST_VERTEX - OFFSET_FIRST_INDEX;

		m_data.push_back(VertexElementData(tcu::Vec4( 1.0f, -1.0f, 1.0f, 1.0f), tcu::Vec4(1.0f), -1));
		m_data.push_back(VertexElementData(tcu::Vec4(-1.0f,  1.0f, 1.0f, 1.0f), tcu::Vec4(1.0f), -1));

		if (!isIndexed())
			refIndex = 0;

		m_data.push_back(VertexElementData(tcu::Vec4(-0.3f,	-0.3f, 1.0f, 1.0f), tcu::Vec4(1.0f), refIndex++));
		m_data.push_back(VertexElementData(tcu::Vec4(-0.3f,	 0.3f, 1.0f, 1.0f), tcu::Vec4(1.0f), refIndex++));
		m_data.push_back(VertexElementData(tcu::Vec4( 0.3f,	-0.3f, 1.0f, 1.0f), tcu::Vec4(1.0f), refIndex++));
		m_data.push_back(VertexElementData(tcu::Vec4( 0.3f,	 0.3f, 1.0f, 1.0f), tcu::Vec4(1.0f), refIndex++));

		m_data.push_back(VertexElementData(tcu::Vec4(-1.0f,  1.0f, 1.0f, 1.0f), tcu::Vec4(1.0f), -1));
		m_data.push_back(VertexElementData(tcu::Vec4( 1.0f, -1.0f, 1.0f, 1.0f), tcu::Vec4(1.0f), -1));
		m_data.push_back(VertexElementData(tcu::Vec4(-1.0f, -1.0f, 1.0f, 1.0f), tcu::Vec4(1.0f), -1));

		if (!isIndexed())
			refIndex = 0;

		m_data.push_back(VertexElementData(tcu::Vec4(-0.3f,	-0.3f, 1.0f, 1.0f), tcu::Vec4(1.0f), refIndex++));
		m_data.push_back(VertexElementData(tcu::Vec4(-0.3f,	 0.3f, 1.0f, 1.0f), tcu::Vec4(1.0f), refIndex++));
		m_data.push_back(VertexElementData(tcu::Vec4( 0.3f,	-0.3f, 1.0f, 1.0f), tcu::Vec4(1.0f), refIndex++));
		m_data.push_back(VertexElementData(tcu::Vec4( 0.3f,	 0.3f, 1.0f, 1.0f), tcu::Vec4(1.0f), refIndex++));

		m_data.push_back(VertexElementData(tcu::Vec4(-1.0f,  1.0f, 1.0f, 1.0f), tcu::Vec4(1.0f), -1));
		m_data.push_back(VertexElementData(tcu::Vec4( 1.0f, -1.0f, 1.0f, 1.0f), tcu::Vec4(1.0f), -1));

		// Make sure constants are up to date
		DE_ASSERT(m_data.size() == NDX_SECOND_VERTEX + NUM_VERTICES + 2);
		DE_ASSERT(NDX_SECOND_VERTEX - NDX_FIRST_VERTEX - NUM_VERTICES == 3);
	}

	if (isIndirect())
	{
		const std::size_t	indirectBufferSize	= MAX_INDIRECT_DRAW_COUNT * 32;	// space for COUNT commands plus some gratuitous padding
							m_indirectBuffer	= Buffer::createAndAlloc(m_vk, m_context.getDevice(), BufferCreateInfo(indirectBufferSize, vk::VK_BUFFER_USAGE_INDIRECT_BUFFER_BIT),
												  m_context.getDefaultAllocator(), vk::MemoryRequirement::HostVisible);

		deMemset(m_indirectBuffer->getBoundMemory().getHostPtr(), 0, indirectBufferSize);
		vk::flushMappedMemoryRange(m_vk, m_context.getDevice(), m_indirectBuffer->getBoundMemory().getMemory(), m_indirectBuffer->getBoundMemory().getOffset(), VK_WHOLE_SIZE);
	}

	if (isIndexed())
	{
		DE_ASSERT(NDX_FIRST_INDEX + NUM_VERTICES <= NDX_SECOND_INDEX);
		const std::size_t	indexBufferSize	= sizeof(deUint32) * (NDX_SECOND_INDEX + NUM_VERTICES);
							m_indexBuffer	= Buffer::createAndAlloc(m_vk, m_context.getDevice(), BufferCreateInfo(indexBufferSize, vk::VK_BUFFER_USAGE_INDEX_BUFFER_BIT),
																	 m_context.getDefaultAllocator(), vk::MemoryRequirement::HostVisible);
		deUint32*			indices			= static_cast<deUint32*>(m_indexBuffer->getBoundMemory().getHostPtr());

		deMemset(indices, 0, indexBufferSize);

		for (int i = 0; i < NUM_VERTICES; i++)
		{
			indices[NDX_FIRST_INDEX  + i] = static_cast<deUint32>(NDX_FIRST_VERTEX  + i) - OFFSET_FIRST_INDEX;
			indices[NDX_SECOND_INDEX + i] = static_cast<deUint32>(NDX_SECOND_VERTEX + i) - OFFSET_SECOND_INDEX;
		}

		vk::flushMappedMemoryRange(m_vk, m_context.getDevice(), m_indexBuffer->getBoundMemory().getMemory(), m_indexBuffer->getBoundMemory().getOffset(), VK_WHOLE_SIZE);
	}

	initialize();
}

template<typename T, std::size_t N>
void DrawTest::setIndirectCommand (const T (&pCmdData)[N])
{
	DE_ASSERT(N != 0 && N <= MAX_INDIRECT_DRAW_COUNT);

	const std::size_t dataSize = N * sizeof(T);

	deMemcpy(m_indirectBuffer->getBoundMemory().getHostPtr(), pCmdData, dataSize);
	vk::flushMappedMemoryRange(m_vk, m_context.getDevice(), m_indirectBuffer->getBoundMemory().getMemory(), m_indirectBuffer->getBoundMemory().getOffset(), VK_WHOLE_SIZE);
}

//! This function must be kept in sync with the shader.
void DrawTest::drawReferenceImage (const tcu::PixelBufferAccess& refImage) const
{
	using tcu::Vec2;
	using tcu::Vec4;
	using tcu::IVec4;

	const Vec2	perInstanceOffset[]	= { Vec2(0.0f, 0.0f), Vec2(-0.3f,  0.0f), Vec2(0.0f, 0.3f) };
	const Vec2	perDrawOffset[]		= { Vec2(0.0f, 0.0f), Vec2(-0.3f, -0.3f), Vec2(0.3f, 0.3f) };
	const Vec4	allColors[]			= { Vec4(1.0f), Vec4(0.0f, 0.0f, 1.0f, 1.0f), Vec4(0.0f, 1.0f, 0.0f, 1.0f) };
	const int	numInstances		= isInstanced() ? MAX_INSTANCE_COUNT		: 1;
	const int	numIndirectDraws	= isMultiDraw() ? MAX_INDIRECT_DRAW_COUNT	: 1;
	const int	rectWidth			= static_cast<int>(static_cast<float>(WIDTH)  * 0.6f / 2.0f);
	const int	rectHeight			= static_cast<int>(static_cast<float>(HEIGHT) * 0.6f / 2.0f);

	DE_ASSERT(DE_LENGTH_OF_ARRAY(perInstanceOffset) >= numInstances);
	DE_ASSERT(DE_LENGTH_OF_ARRAY(allColors) >= numInstances && DE_LENGTH_OF_ARRAY(allColors) >= numIndirectDraws);
	DE_ASSERT(DE_LENGTH_OF_ARRAY(perDrawOffset) >= numIndirectDraws);

	tcu::clear(refImage, tcu::Vec4(0.0f, 0.0f, 0.0f, 1.0f));

	for (int drawNdx     = 0; drawNdx     < numIndirectDraws; ++drawNdx)
	for (int instanceNdx = 0; instanceNdx < numInstances;     ++instanceNdx)
	{
		const Vec2	offset	= perInstanceOffset[instanceNdx] + perDrawOffset[drawNdx];
		const Vec4&	color	= allColors[isMultiDraw() ? drawNdx : instanceNdx];
		int			x		= static_cast<int>(static_cast<float>(WIDTH)  * (1.0f - 0.3f + offset.x()) / 2.0f);
		int			y		= static_cast<int>(static_cast<float>(HEIGHT) * (1.0f - 0.3f + offset.y()) / 2.0f);

		tcu::clear(tcu::getSubregion(refImage, x, y, rectWidth, rectHeight), color);
	}
}

tcu::TestStatus DrawTest::iterate (void)
{
	// Draw
	{
		beginRenderPass();

		const vk::VkDeviceSize	vertexBufferOffset	= 0;
		const vk::VkBuffer		vertexBuffer		= m_vertexBuffer->object();

		m_vk.cmdBindVertexBuffers	(*m_cmdBuffer, 0, 1, &vertexBuffer, &vertexBufferOffset);
		m_vk.cmdBindPipeline		(*m_cmdBuffer, vk::VK_PIPELINE_BIND_POINT_GRAPHICS, *m_pipeline);

		if (isIndexed())
			m_vk.cmdBindIndexBuffer(*m_cmdBuffer, m_indexBuffer->object(), 0ull, vk::VK_INDEX_TYPE_UINT32);

		const deUint32			numInstances		= isInstanced() ? MAX_INSTANCE_COUNT : 1;

		if (isIndirect())
		{
			if (isIndexed())
			{
				const vk::VkDrawIndexedIndirectCommand commands[] =
				{
					// indexCount, instanceCount, firstIndex, vertexOffset, firstInstance
					{ NUM_VERTICES,	numInstances,	NDX_FIRST_INDEX,	OFFSET_FIRST_INDEX,		(isFirstInstance() ? 2u : 0u) },
					{ NUM_VERTICES,	numInstances,	NDX_SECOND_INDEX,	OFFSET_SECOND_INDEX,	(isFirstInstance() ? 1u : 0u) },
					{ NUM_VERTICES,	numInstances,	NDX_FIRST_INDEX,	OFFSET_FIRST_INDEX,		(isFirstInstance() ? 3u : 0u) },
				};
				setIndirectCommand(commands);
			}
			else
			{
				const vk::VkDrawIndirectCommand commands[] =
				{
					// vertexCount, instanceCount, firstVertex, firstInstance
					{ NUM_VERTICES,	numInstances,	NDX_FIRST_VERTEX,	(isFirstInstance() ? 2u : 0u) },
					{ NUM_VERTICES,	numInstances,	NDX_SECOND_VERTEX,	(isFirstInstance() ? 1u : 0u) },
					{ NUM_VERTICES,	numInstances,	NDX_FIRST_VERTEX,	(isFirstInstance() ? 3u : 0u) },
				};
				setIndirectCommand(commands);
			}
		}

		if (isIndirect())
		{
			const deUint32 numIndirectDraws = isMultiDraw() ? MAX_INDIRECT_DRAW_COUNT : 1;

			if (isIndexed())
				m_vk.cmdDrawIndexedIndirect(*m_cmdBuffer, m_indirectBuffer->object(), 0ull, numIndirectDraws, sizeof(vk::VkDrawIndexedIndirectCommand));
			else
				m_vk.cmdDrawIndirect(*m_cmdBuffer, m_indirectBuffer->object(), 0ull, numIndirectDraws, sizeof(vk::VkDrawIndirectCommand));
		}
		else
		{
			const deUint32 firstInstance = 2;

			if (isIndexed())
				m_vk.cmdDrawIndexed(*m_cmdBuffer, NUM_VERTICES, numInstances, NDX_FIRST_INDEX, OFFSET_FIRST_INDEX, firstInstance);
			else
				m_vk.cmdDraw(*m_cmdBuffer, NUM_VERTICES, numInstances, NDX_FIRST_VERTEX, firstInstance);
		}

		endRenderPass(m_vk, *m_cmdBuffer);
		endCommandBuffer(m_vk, *m_cmdBuffer);
	}

	// Submit
	{
		const vk::VkQueue		queue		= m_context.getUniversalQueue();
		const vk::VkDevice		device		= m_context.getDevice();

		submitCommandsAndWait(m_vk, device, queue, m_cmdBuffer.get());
	}

	// Validate
	{
		tcu::TextureLevel referenceFrame(vk::mapVkFormat(m_colorAttachmentFormat), static_cast<int>(0.5f + static_cast<float>(WIDTH)), static_cast<int>(0.5f + static_cast<float>(HEIGHT)));

		drawReferenceImage(referenceFrame.getAccess());

		const vk::VkOffset3D				zeroOffset		= { 0, 0, 0 };
		const tcu::ConstPixelBufferAccess	renderedFrame	= m_colorTargetImage->readSurface(m_context.getUniversalQueue(), m_context.getDefaultAllocator(),
															  vk::VK_IMAGE_LAYOUT_GENERAL, zeroOffset, WIDTH, HEIGHT, vk::VK_IMAGE_ASPECT_COLOR_BIT);

		if (!tcu::fuzzyCompare(m_context.getTestContext().getLog(), "Result", "Image comparison result", referenceFrame.getAccess(), renderedFrame, 0.05f, tcu::COMPARE_LOG_RESULT))
			return tcu::TestStatus::fail("Rendered image is incorrect");
		else
			return tcu::TestStatus::pass("OK");
	}
}

void checkSupport (Context& context, TestFlags flags)
{
	context.requireDeviceFunctionality("VK_KHR_shader_draw_parameters");

	// Shader draw parameters is part of Vulkan 1.1 but is optional
	if (context.contextSupports(vk::ApiVersion(0, 1, 1, 0)) )
	{
		// Check if shader draw parameters is supported on the physical device.
		vk::VkPhysicalDeviceShaderDrawParametersFeatures	drawParameters	=
		{
			vk::VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_DRAW_PARAMETERS_FEATURES,	// sType
			DE_NULL,																// pNext
			VK_FALSE																// shaderDrawParameters
		};

		vk::VkPhysicalDeviceFeatures						features;
		deMemset(&features, 0, sizeof(vk::VkPhysicalDeviceFeatures));

		vk::VkPhysicalDeviceFeatures2						featuresExt		=
		{
			vk::VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FEATURES_2,					// sType
			&drawParameters,													// pNext
			features
		};

		context.getInstanceInterface().getPhysicalDeviceFeatures2(context.getPhysicalDevice(), &featuresExt);

		if (drawParameters.shaderDrawParameters == VK_FALSE)
			TCU_THROW(NotSupportedError, "shaderDrawParameters feature not supported by the device");
	}

	if (flags & TEST_FLAG_MULTIDRAW)
		context.requireDeviceCoreFeature(DEVICE_CORE_FEATURE_MULTI_DRAW_INDIRECT);

	if (flags & TEST_FLAG_FIRST_INSTANCE)
		context.requireDeviceCoreFeature(DEVICE_CORE_FEATURE_DRAW_INDIRECT_FIRST_INSTANCE);
}

void addDrawCase (tcu::TestCaseGroup* group, const DrawTest::TestSpec testSpec, const TestFlags flags)
{
	std::ostringstream name;
	name << "draw";

	if (flags & TEST_FLAG_INDEXED)			name << "_indexed";
	if (flags & TEST_FLAG_INDIRECT)			name << "_indirect";
	if (flags & TEST_FLAG_INSTANCED)		name << "_instanced";
	if (flags & TEST_FLAG_FIRST_INSTANCE)	name << "_first_instance";

	group->addChild(new InstanceFactory<DrawTest, FunctionSupport1<TestFlags>>(group->getTestContext(), name.str(), "", addFlags(testSpec, flags), FunctionSupport1<TestFlags>::Args(checkSupport, testSpec.flags | flags)));
}

}	// anonymous

ShaderDrawParametersTests::ShaderDrawParametersTests (tcu::TestContext &testCtx)
	: TestCaseGroup	(testCtx, "shader_draw_parameters", "VK_KHR_shader_draw_parameters")
{
}

void ShaderDrawParametersTests::init (void)
{
	{
		DrawTest::TestSpec testSpec;
		testSpec.shaders[glu::SHADERTYPE_VERTEX]	= "vulkan/draw/VertexFetchShaderDrawParameters.vert";
		testSpec.shaders[glu::SHADERTYPE_FRAGMENT]	= "vulkan/draw/VertexFetch.frag";
		testSpec.topology							= vk::VK_PRIMITIVE_TOPOLOGY_TRIANGLE_STRIP;
		testSpec.flags								= 0;

		de::MovePtr<tcu::TestCaseGroup> group(new tcu::TestCaseGroup(getTestContext(), "base_vertex", ""));
		addDrawCase(group.get(), testSpec, 0);
		addDrawCase(group.get(), testSpec, TEST_FLAG_INDEXED);
		addDrawCase(group.get(), testSpec, TEST_FLAG_INDIRECT);
		addDrawCase(group.get(), testSpec, TEST_FLAG_INDEXED | TEST_FLAG_INDIRECT);
		addChild(group.release());
	}
	{
		DrawTest::TestSpec testSpec;
		testSpec.shaders[glu::SHADERTYPE_VERTEX]	= "vulkan/draw/VertexFetchShaderDrawParameters.vert";
		testSpec.shaders[glu::SHADERTYPE_FRAGMENT]	= "vulkan/draw/VertexFetch.frag";
		testSpec.topology							= vk::VK_PRIMITIVE_TOPOLOGY_TRIANGLE_STRIP;
		testSpec.flags								= TEST_FLAG_INSTANCED;

		de::MovePtr<tcu::TestCaseGroup> group(new tcu::TestCaseGroup(getTestContext(), "base_instance", ""));
		addDrawCase(group.get(), testSpec, 0);
		addDrawCase(group.get(), testSpec, TEST_FLAG_INDEXED);
		addDrawCase(group.get(), testSpec, TEST_FLAG_INDIRECT);
		addDrawCase(group.get(), testSpec, TEST_FLAG_INDIRECT | TEST_FLAG_FIRST_INSTANCE);
		addDrawCase(group.get(), testSpec, TEST_FLAG_INDEXED  | TEST_FLAG_INDIRECT);
		addDrawCase(group.get(), testSpec, TEST_FLAG_INDEXED  | TEST_FLAG_INDIRECT | TEST_FLAG_FIRST_INSTANCE);
		addChild(group.release());
	}
	{
		DrawTest::TestSpec testSpec;
		testSpec.shaders[glu::SHADERTYPE_VERTEX]	= "vulkan/draw/VertexFetchShaderDrawParametersDrawIndex.vert";
		testSpec.shaders[glu::SHADERTYPE_FRAGMENT]	= "vulkan/draw/VertexFetch.frag";
		testSpec.topology							= vk::VK_PRIMITIVE_TOPOLOGY_TRIANGLE_STRIP;
		testSpec.flags								= TEST_FLAG_INDIRECT | TEST_FLAG_MULTIDRAW;

		de::MovePtr<tcu::TestCaseGroup> group(new tcu::TestCaseGroup(getTestContext(), "draw_index", ""));
		addDrawCase(group.get(), testSpec, 0);
		addDrawCase(group.get(), testSpec, TEST_FLAG_INSTANCED);
		addDrawCase(group.get(), testSpec, TEST_FLAG_INDEXED);
		addDrawCase(group.get(), testSpec, TEST_FLAG_INDEXED | TEST_FLAG_INSTANCED);
		addChild(group.release());
	}
}

}	// DrawTests
}	// vkt