/*------------------------------------------------------------------------
 * Vulkan Conformance Tests
 * ------------------------
 *
 * Copyright (c) 2015 The Khronos Group Inc.
 * Copyright (c) 2015 Intel Corporation
 *
 * 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 Dynamic State Viewport Tests
 *//*--------------------------------------------------------------------*/

#include "vktDynamicStateVPTests.hpp"

#include "vktDynamicStateBaseClass.hpp"
#include "vktDynamicStateTestCaseUtil.hpp"

#include "vkImageUtil.hpp"
#include "vkCmdUtil.hpp"

#include "tcuTextureUtil.hpp"
#include "tcuImageCompare.hpp"
#include "tcuRGBA.hpp"

namespace vkt
{
namespace DynamicState
{

using namespace Draw;

namespace
{

class ViewportStateBaseCase : public DynamicStateBaseClass
{
public:
	ViewportStateBaseCase (Context& context, const char* vertexShaderName, const char* fragmentShaderName)
		: DynamicStateBaseClass	(context, vertexShaderName, fragmentShaderName)
	{}

	void initialize(void)
	{
		m_topology = vk::VK_PRIMITIVE_TOPOLOGY_TRIANGLE_STRIP;

		m_data.push_back(PositionColorVertex(tcu::Vec4(-0.5f, 0.5f, 1.0f, 1.0f), tcu::RGBA::green().toVec()));
		m_data.push_back(PositionColorVertex(tcu::Vec4(0.5f, 0.5f, 1.0f, 1.0f), tcu::RGBA::green().toVec()));
		m_data.push_back(PositionColorVertex(tcu::Vec4(-0.5f, -0.5f, 1.0f, 1.0f), tcu::RGBA::green().toVec()));
		m_data.push_back(PositionColorVertex(tcu::Vec4(0.5f, -0.5f, 1.0f, 1.0f), tcu::RGBA::green().toVec()));

		DynamicStateBaseClass::initialize();
	}

	virtual tcu::Texture2D buildReferenceFrame (void)
	{
		DE_ASSERT(false);
		return tcu::Texture2D(tcu::TextureFormat(), 0, 0);
	}

	virtual void setDynamicStates (void)
	{
		DE_ASSERT(false);
	}

	virtual tcu::TestStatus iterate (void)
	{
		tcu::TestLog&		log		= m_context.getTestContext().getLog();
		const vk::VkQueue	queue	= m_context.getUniversalQueue();
		const vk::VkDevice	device	= m_context.getDevice();

		beginRenderPass();

		// set states here
		setDynamicStates();

		m_vk.cmdBindPipeline(*m_cmdBuffer, vk::VK_PIPELINE_BIND_POINT_GRAPHICS, *m_pipeline);

		const vk::VkDeviceSize vertexBufferOffset = 0;
		const vk::VkBuffer vertexBuffer = m_vertexBuffer->object();
		m_vk.cmdBindVertexBuffers(*m_cmdBuffer, 0, 1, &vertexBuffer, &vertexBufferOffset);

		m_vk.cmdDraw(*m_cmdBuffer, static_cast<deUint32>(m_data.size()), 1, 0, 0);

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

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

		// validation
		{
			tcu::Texture2D referenceFrame = buildReferenceFrame();

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

			if (!tcu::fuzzyCompare(log, "Result", "Image comparison result",
				referenceFrame.getLevel(0), renderedFrame, 0.05f,
				tcu::COMPARE_LOG_RESULT))
			{
				return tcu::TestStatus(QP_TEST_RESULT_FAIL, "Image verification failed");
			}

			return tcu::TestStatus(QP_TEST_RESULT_PASS, "Image verification passed");
		}
	}
};

class ViewportParamTestInstance : public ViewportStateBaseCase
{
public:
	ViewportParamTestInstance (Context& context, ShaderMap shaders)
		: ViewportStateBaseCase (context, shaders[glu::SHADERTYPE_VERTEX], shaders[glu::SHADERTYPE_FRAGMENT])
	{
		ViewportStateBaseCase::initialize();
	}

	virtual void setDynamicStates(void)
	{
		const vk::VkViewport viewport	= { 0.0f, 0.0f, (float)WIDTH * 2, (float)HEIGHT * 2, 0.0f, 0.0f };
		const vk::VkRect2D scissor		= { { 0, 0 }, { WIDTH, HEIGHT } };

		setDynamicViewportState(1, &viewport, &scissor);
		setDynamicRasterizationState();
		setDynamicBlendState();
		setDynamicDepthStencilState();
	}

	virtual tcu::Texture2D buildReferenceFrame (void)
	{
		tcu::Texture2D referenceFrame(vk::mapVkFormat(m_colorAttachmentFormat), (int)(0.5 + WIDTH), (int)(0.5 + HEIGHT));
		referenceFrame.allocLevel(0);

		const deInt32 frameWidth	= referenceFrame.getWidth();
		const deInt32 frameHeight	= referenceFrame.getHeight();

		tcu::clear(referenceFrame.getLevel(0), tcu::Vec4(0.0f, 0.0f, 0.0f, 1.0f));

		for (int y = 0; y < frameHeight; y++)
		{
			const float yCoord = (float)(y / (0.5*frameHeight)) - 1.0f;

			for (int x = 0; x < frameWidth; x++)
			{
				const float xCoord = (float)(x / (0.5*frameWidth)) - 1.0f;

				if (xCoord >= 0.0f && xCoord <= 1.0f && yCoord >= 0.0f && yCoord <= 1.0f)
					referenceFrame.getLevel(0).setPixel(tcu::Vec4(0.0f, 1.0f, 0.0f, 1.0f), x, y);
			}
		}

		return referenceFrame;
	}
};

class ScissorParamTestInstance : public ViewportStateBaseCase
{
public:
	ScissorParamTestInstance (Context& context, ShaderMap shaders)
		: ViewportStateBaseCase (context, shaders[glu::SHADERTYPE_VERTEX], shaders[glu::SHADERTYPE_FRAGMENT])
	{
		ViewportStateBaseCase::initialize();
	}

	virtual void setDynamicStates (void)
	{
		const vk::VkViewport viewport	= { 0.0f, 0.0f, (float)WIDTH, (float)HEIGHT, 0.0f, 0.0f };
		const vk::VkRect2D scissor		= { { 0, 0 }, { WIDTH / 2, HEIGHT / 2 } };

		setDynamicViewportState(1, &viewport, &scissor);
		setDynamicRasterizationState();
		setDynamicBlendState();
		setDynamicDepthStencilState();
	}

	virtual tcu::Texture2D buildReferenceFrame (void)
	{
		tcu::Texture2D referenceFrame(vk::mapVkFormat(m_colorAttachmentFormat), (int)(0.5 + WIDTH), (int)(0.5 + HEIGHT));
		referenceFrame.allocLevel(0);

		const deInt32 frameWidth	= referenceFrame.getWidth();
		const deInt32 frameHeight	= referenceFrame.getHeight();

		tcu::clear(referenceFrame.getLevel(0), tcu::Vec4(0.0f, 0.0f, 0.0f, 1.0f));

		for (int y = 0; y < frameHeight; y++)
		{
			const float yCoord = (float)(y / (0.5*frameHeight)) - 1.0f;

			for (int x = 0; x < frameWidth; x++)
			{
				const float xCoord = (float)(x / (0.5*frameWidth)) - 1.0f;

				if (xCoord >= -0.5f && xCoord <= 0.0f && yCoord >= -0.5f && yCoord <= 0.0f)
					referenceFrame.getLevel(0).setPixel(tcu::Vec4(0.0f, 1.0f, 0.0f, 1.0f), x, y);
			}
		}

		return referenceFrame;
	}
};

class ViewportArrayTestInstance : public DynamicStateBaseClass
{
protected:
	std::string m_geometryShaderName;

public:

	ViewportArrayTestInstance (Context& context, ShaderMap shaders)
		: DynamicStateBaseClass	(context, shaders[glu::SHADERTYPE_VERTEX], shaders[glu::SHADERTYPE_FRAGMENT])
		, m_geometryShaderName	(shaders[glu::SHADERTYPE_GEOMETRY])
	{
		// Check geometry shader support
		{
			const vk::VkPhysicalDeviceFeatures& deviceFeatures = m_context.getDeviceFeatures();

			if (!deviceFeatures.multiViewport)
				throw tcu::NotSupportedError("Multi-viewport is not supported");

			if (!deviceFeatures.geometryShader)
				throw tcu::NotSupportedError("Geometry shaders are not supported");
		}

		for (int i = 0; i < 4; i++)
		{
			m_data.push_back(PositionColorVertex(tcu::Vec4(-1.0f, 1.0f, (float)i / 3.0f, 1.0f), tcu::RGBA::green().toVec()));
			m_data.push_back(PositionColorVertex(tcu::Vec4(1.0f, 1.0f, (float)i / 3.0f, 1.0f), tcu::RGBA::green().toVec()));
			m_data.push_back(PositionColorVertex(tcu::Vec4(-1.0f, -1.0f, (float)i / 3.0f, 1.0f), tcu::RGBA::green().toVec()));
			m_data.push_back(PositionColorVertex(tcu::Vec4(1.0f, -1.0f, (float)i / 3.0f, 1.0f), tcu::RGBA::green().toVec()));
		}

		DynamicStateBaseClass::initialize();
	}

	virtual void initPipeline (const vk::VkDevice device)
	{
		const vk::Unique<vk::VkShaderModule> vs(createShaderModule(m_vk, device, m_context.getBinaryCollection().get(m_vertexShaderName), 0));
		const vk::Unique<vk::VkShaderModule> gs(createShaderModule(m_vk, device, m_context.getBinaryCollection().get(m_geometryShaderName), 0));
		const vk::Unique<vk::VkShaderModule> fs(createShaderModule(m_vk, device, m_context.getBinaryCollection().get(m_fragmentShaderName), 0));

		const PipelineCreateInfo::ColorBlendState::Attachment vkCbAttachmentState;

		PipelineCreateInfo pipelineCreateInfo(*m_pipelineLayout, *m_renderPass, 0, 0);
		pipelineCreateInfo.addShader(PipelineCreateInfo::PipelineShaderStage(*vs, "main", vk::VK_SHADER_STAGE_VERTEX_BIT));
		pipelineCreateInfo.addShader(PipelineCreateInfo::PipelineShaderStage(*gs, "main", vk::VK_SHADER_STAGE_GEOMETRY_BIT));
		pipelineCreateInfo.addShader(PipelineCreateInfo::PipelineShaderStage(*fs, "main", vk::VK_SHADER_STAGE_FRAGMENT_BIT));
		pipelineCreateInfo.addState(PipelineCreateInfo::VertexInputState(m_vertexInputState));
		pipelineCreateInfo.addState(PipelineCreateInfo::InputAssemblerState(m_topology));
		pipelineCreateInfo.addState(PipelineCreateInfo::ColorBlendState(1, &vkCbAttachmentState));
		pipelineCreateInfo.addState(PipelineCreateInfo::ViewportState(4));
		pipelineCreateInfo.addState(PipelineCreateInfo::DepthStencilState());
		pipelineCreateInfo.addState(PipelineCreateInfo::RasterizerState());
		pipelineCreateInfo.addState(PipelineCreateInfo::MultiSampleState());
		pipelineCreateInfo.addState(PipelineCreateInfo::DynamicState());

		m_pipeline = vk::createGraphicsPipeline(m_vk, device, DE_NULL, &pipelineCreateInfo);
	}

	virtual tcu::TestStatus iterate (void)
	{
		tcu::TestLog&		log		= m_context.getTestContext().getLog();
		const vk::VkQueue	queue	= m_context.getUniversalQueue();
		const vk::VkDevice	device	= m_context.getDevice();

		beginRenderPass();

		// set states here
		const float halfWidth		= (float)WIDTH / 2;
		const float halfHeight		= (float)HEIGHT / 2;
		const deInt32 quarterWidth	= WIDTH / 4;
		const deInt32 quarterHeight = HEIGHT / 4;

		const vk::VkViewport viewports[4] =
		{
			{ 0.0f, 0.0f, (float)halfWidth, (float)halfHeight, 0.0f, 0.0f },
			{ halfWidth, 0.0f, (float)halfWidth, (float)halfHeight, 0.0f, 0.0f },
			{ halfWidth, halfHeight, (float)halfWidth, (float)halfHeight, 0.0f, 0.0f },
			{ 0.0f, halfHeight, (float)halfWidth, (float)halfHeight, 0.0f, 0.0f }
		};

		const vk::VkRect2D scissors[4] =
		{
			{ { quarterWidth, quarterHeight }, { quarterWidth, quarterHeight } },
			{ { (deInt32)halfWidth, quarterHeight }, { quarterWidth, quarterHeight } },
			{ { (deInt32)halfWidth, (deInt32)halfHeight }, { quarterWidth, quarterHeight } },
			{ { quarterWidth, (deInt32)halfHeight }, { quarterWidth, quarterHeight } },
		};

		setDynamicViewportState(4, viewports, scissors);
		setDynamicRasterizationState();
		setDynamicBlendState();
		setDynamicDepthStencilState();

		m_vk.cmdBindPipeline(*m_cmdBuffer, vk::VK_PIPELINE_BIND_POINT_GRAPHICS, *m_pipeline);

		const vk::VkDeviceSize vertexBufferOffset = 0;
		const vk::VkBuffer vertexBuffer = m_vertexBuffer->object();
		m_vk.cmdBindVertexBuffers(*m_cmdBuffer, 0, 1, &vertexBuffer, &vertexBufferOffset);

		m_vk.cmdDraw(*m_cmdBuffer, static_cast<deUint32>(m_data.size()), 1, 0, 0);

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

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

		// validation
		{
			tcu::Texture2D referenceFrame(vk::mapVkFormat(m_colorAttachmentFormat), (int)(0.5 + WIDTH), (int)(0.5 + HEIGHT));
			referenceFrame.allocLevel(0);

			const deInt32 frameWidth = referenceFrame.getWidth();
			const deInt32 frameHeight = referenceFrame.getHeight();

			tcu::clear(referenceFrame.getLevel(0), tcu::Vec4(0.0f, 0.0f, 0.0f, 1.0f));

			for (int y = 0; y < frameHeight; y++)
			{
				const float yCoord = (float)(y / (0.5*frameHeight)) - 1.0f;

				for (int x = 0; x < frameWidth; x++)
				{
					const float xCoord = (float)(x / (0.5*frameWidth)) - 1.0f;

					if (xCoord >= -0.5f && xCoord <= 0.5f && yCoord >= -0.5f && yCoord <= 0.5f)
						referenceFrame.getLevel(0).setPixel(tcu::Vec4(0.0f, 1.0f, 0.0f, 1.0f), x, y);
				}
			}

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

			if (!tcu::fuzzyCompare(log, "Result", "Image comparison result",
				referenceFrame.getLevel(0), renderedFrame, 0.05f,
				tcu::COMPARE_LOG_RESULT))
			{
				return tcu::TestStatus(QP_TEST_RESULT_FAIL, "Image verification failed");
			}

			return tcu::TestStatus(QP_TEST_RESULT_PASS, "Image verification passed");
		}
	}
};

} //anonymous

DynamicStateVPTests::DynamicStateVPTests (tcu::TestContext& testCtx)
	: TestCaseGroup (testCtx, "vp_state", "Tests for viewport state")
{
	/* Left blank on purpose */
}

DynamicStateVPTests::~DynamicStateVPTests ()
{
}

void DynamicStateVPTests::init (void)
{
	ShaderMap shaderPaths;
	shaderPaths[glu::SHADERTYPE_VERTEX] = "vulkan/dynamic_state/VertexFetch.vert";
	shaderPaths[glu::SHADERTYPE_FRAGMENT] = "vulkan/dynamic_state/VertexFetch.frag";

	addChild(new InstanceFactory<ViewportParamTestInstance>(m_testCtx, "viewport", "Set viewport which is twice bigger than screen size", shaderPaths));
	addChild(new InstanceFactory<ScissorParamTestInstance>(m_testCtx, "scissor", "Perform a scissor test on 1/4 bottom-left part of the surface", shaderPaths));

	shaderPaths[glu::SHADERTYPE_GEOMETRY] = "vulkan/dynamic_state/ViewportArray.geom";
	addChild(new InstanceFactory<ViewportArrayTestInstance>(m_testCtx, "viewport_array", "Multiple viewports and scissors", shaderPaths));
}

} // DynamicState
} // vkt