modules/gles2/functional/es2fRandomFragmentOpTests.cpp - platform/external/deqp - Gitiles

 /*-------------------------------------------------------------------------
  * drawElements Quality Program OpenGL ES 3.0 Module
  * -------------------------------------------------
  *
  * Copyright 2014 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.
  *
  *//*!
  * \file
  * \brief Randomized per-fragment operation tests.
  *//*--------------------------------------------------------------------*/

 #include "es2fRandomFragmentOpTests.hpp"
 #include "glsFragmentOpUtil.hpp"
 #include "glsInteractionTestUtil.hpp"
 #include "tcuRenderTarget.hpp"
 #include "tcuTestLog.hpp"
 #include "tcuSurface.hpp"
 #include "tcuCommandLine.hpp"
 #include "tcuImageCompare.hpp"
 #include "tcuVectorUtil.hpp"
 #include "tcuTextureUtil.hpp"
 #include "gluPixelTransfer.hpp"
 #include "gluCallLogWrapper.hpp"
 #include "gluRenderContext.hpp"
 #include "deStringUtil.hpp"
 #include "deRandom.hpp"
 #include "deMath.h"
 #include "glwFunctions.hpp"
 #include "glwEnums.hpp"
 #include "rrFragmentOperations.hpp"
 #include "sglrReferenceUtils.hpp"

 #include <algorithm>

 namespace deqp
 {
 namespace gles2
 {
 namespace Functional
 {

 using std::vector;
 using tcu::TestLog;
 using tcu::Vec2;
 using tcu::Vec4;
 using tcu::IVec2;
 using tcu::BVec4;

 enum
 {
 	VIEWPORT_WIDTH				= 64,
 	VIEWPORT_HEIGHT				= 64,
 	NUM_CALLS_PER_ITERATION		= 3,
 	NUM_ITERATIONS_PER_CASE		= 10
 };

 static const tcu::Vec4		CLEAR_COLOR			(0.25f, 0.5f, 0.75f, 1.0f);
 static const float			CLEAR_DEPTH			= 1.0f;
 static const int			CLEAR_STENCIL		= 0;
 static const bool			ENABLE_CALL_LOG		= true;

 using namespace gls::FragmentOpUtil;
 using namespace gls::InteractionTestUtil;

 void translateStencilState (const StencilState& src, rr::StencilState& dst)
 {
 	dst.func		= sglr::rr_util::mapGLTestFunc(src.function);
 	dst.ref			= src.reference;
 	dst.compMask	= src.compareMask;
 	dst.sFail		= sglr::rr_util::mapGLStencilOp(src.stencilFailOp);
 	dst.dpFail		= sglr::rr_util::mapGLStencilOp(src.depthFailOp);
 	dst.dpPass		= sglr::rr_util::mapGLStencilOp(src.depthPassOp);
 	dst.writeMask	= src.writeMask;
 }

 void translateBlendState (const BlendState& src, rr::BlendState& dst)
 {
 	dst.equation	= sglr::rr_util::mapGLBlendEquation(src.equation);
 	dst.srcFunc		= sglr::rr_util::mapGLBlendFunc(src.srcFunc);
 	dst.dstFunc		= sglr::rr_util::mapGLBlendFunc(src.dstFunc);
 }

 void translateState (const RenderState& src, rr::FragmentOperationState& dst, const tcu::RenderTarget& renderTarget)
 {
 	bool hasDepth		= renderTarget.getDepthBits() > 0;
 	bool hasStencil		= renderTarget.getStencilBits() > 0;

 	dst.scissorTestEnabled		= src.scissorTestEnabled;
 	dst.scissorRectangle		= src.scissorRectangle;
 	dst.stencilTestEnabled		= hasStencil && src.stencilTestEnabled;
 	dst.depthTestEnabled		= hasDepth && src.depthTestEnabled;
 	dst.blendMode				= src.blendEnabled ? rr::BLENDMODE_STANDARD : rr::BLENDMODE_NONE;
 	dst.numStencilBits			= renderTarget.getStencilBits();

 	dst.colorMask = src.colorMask;

 	if (dst.depthTestEnabled)
 	{
 		dst.depthFunc	= sglr::rr_util::mapGLTestFunc(src.depthFunc);
 		dst.depthMask	= src.depthWriteMask;
 	}

 	if (dst.stencilTestEnabled)
 	{
 		translateStencilState(src.stencil[rr::FACETYPE_BACK],	dst.stencilStates[rr::FACETYPE_BACK]);
 		translateStencilState(src.stencil[rr::FACETYPE_FRONT],	dst.stencilStates[rr::FACETYPE_FRONT]);
 	}

 	if (src.blendEnabled)
 	{
 		translateBlendState(src.blendRGBState, dst.blendRGBState);
 		translateBlendState(src.blendAState, dst.blendAState);
 		dst.blendColor = tcu::clamp(src.blendColor, Vec4(0.0f), Vec4(1.0f));
 	}
 }

 static void renderQuad (const glw::Functions& gl, gls::FragmentOpUtil::QuadRenderer& renderer, const gls::FragmentOpUtil::IntegerQuad& quad, int baseX, int baseY)
 {
 	gls::FragmentOpUtil::Quad translated;

 	std::copy(DE_ARRAY_BEGIN(quad.color), DE_ARRAY_END(quad.color), DE_ARRAY_BEGIN(translated.color));

 	bool	flipX		= quad.posB.x() < quad.posA.x();
 	bool	flipY		= quad.posB.y() < quad.posA.y();
 	int		viewportX	= de::min(quad.posA.x(), quad.posB.x());
 	int		viewportY	= de::min(quad.posA.y(), quad.posB.y());
 	int		viewportW	= de::abs(quad.posA.x()-quad.posB.x())+1;
 	int		viewportH	= de::abs(quad.posA.y()-quad.posB.y())+1;

 	translated.posA = Vec2(flipX ? 1.0f : -1.0f, flipY ? 1.0f : -1.0f);
 	translated.posB = Vec2(flipX ? -1.0f : 1.0f, flipY ? -1.0f : 1.0f);

 	// \todo [2012-12-18 pyry] Pass in DepthRange parameters.
 	for (int ndx = 0; ndx < DE_LENGTH_OF_ARRAY(quad.depth); ndx++)
 		translated.depth[ndx] = quad.depth[ndx]*2.0f - 1.0f;

 	gl.viewport(baseX+viewportX, baseY+viewportY, viewportW, viewportH);
 	renderer.render(translated);
 }

 static void setGLState (glu::CallLogWrapper& wrapper, const RenderState& state, int viewportX, int viewportY)
 {
 	if (state.scissorTestEnabled)
 	{
 		wrapper.glEnable(GL_SCISSOR_TEST);
 		wrapper.glScissor(viewportX+state.scissorRectangle.left, viewportY+state.scissorRectangle.bottom,
 						  state.scissorRectangle.width, state.scissorRectangle.height);
 	}
 	else
 		wrapper.glDisable(GL_SCISSOR_TEST);

 	if (state.stencilTestEnabled)
 	{
 		wrapper.glEnable(GL_STENCIL_TEST);

 		for (int face = 0; face < rr::FACETYPE_LAST; face++)
 		{
 			deUint32				glFace	= face == rr::FACETYPE_BACK ? GL_BACK : GL_FRONT;
 			const StencilState&		sParams	= state.stencil[face];

 			wrapper.glStencilFuncSeparate(glFace, sParams.function, sParams.reference, sParams.compareMask);
 			wrapper.glStencilOpSeparate(glFace, sParams.stencilFailOp, sParams.depthFailOp, sParams.depthPassOp);
 			wrapper.glStencilMaskSeparate(glFace, sParams.writeMask);
 		}
 	}
 	else
 		wrapper.glDisable(GL_STENCIL_TEST);

 	if (state.depthTestEnabled)
 	{
 		wrapper.glEnable(GL_DEPTH_TEST);
 		wrapper.glDepthFunc(state.depthFunc);
 		wrapper.glDepthMask(state.depthWriteMask ? GL_TRUE : GL_FALSE);
 	}
 	else
 		wrapper.glDisable(GL_DEPTH_TEST);

 	if (state.blendEnabled)
 	{
 		wrapper.glEnable(GL_BLEND);
 		wrapper.glBlendEquationSeparate(state.blendRGBState.equation, state.blendAState.equation);
 		wrapper.glBlendFuncSeparate(state.blendRGBState.srcFunc, state.blendRGBState.dstFunc, state.blendAState.srcFunc, state.blendAState.dstFunc);
 		wrapper.glBlendColor(state.blendColor.x(), state.blendColor.y(), state.blendColor.z(), state.blendColor.w());
 	}
 	else
 		wrapper.glDisable(GL_BLEND);

 	if (state.ditherEnabled)
 		wrapper.glEnable(GL_DITHER);
 	else
 		wrapper.glDisable(GL_DITHER);

 	wrapper.glColorMask(state.colorMask[0] ? GL_TRUE : GL_FALSE,
 						state.colorMask[1] ? GL_TRUE : GL_FALSE,
 						state.colorMask[2] ? GL_TRUE : GL_FALSE,
 						state.colorMask[3] ? GL_TRUE : GL_FALSE);
 }

 class RandomFragmentOpCase : public TestCase
 {
 public:
 						RandomFragmentOpCase		(Context& context, const char* name, const char* desc, deUint32 seed);
 						~RandomFragmentOpCase		(void);

 	void				init						(void);
 	void				deinit						(void);
 	IterateResult		iterate						(void);

 private:
 	tcu::UVec4			getCompareThreshold			(void) const;

 	deUint32										m_seed;

 	glu::CallLogWrapper						m_callLogWrapper;

 	gls::FragmentOpUtil::QuadRenderer*				m_renderer;
 	tcu::TextureLevel*								m_refColorBuffer;
 	tcu::TextureLevel*								m_refDepthBuffer;
 	tcu::TextureLevel*								m_refStencilBuffer;
 	gls::FragmentOpUtil::ReferenceQuadRenderer*		m_refRenderer;

 	int												m_iterNdx;
 };

 RandomFragmentOpCase::RandomFragmentOpCase (Context& context, const char* name, const char* desc, deUint32 seed)
 	: TestCase				(context, name, desc)
 	, m_seed				(seed)
 	, m_callLogWrapper		(context.getRenderContext().getFunctions(), context.getTestContext().getLog())
 	, m_renderer			(DE_NULL)
 	, m_refColorBuffer		(DE_NULL)
 	, m_refDepthBuffer		(DE_NULL)
 	, m_refStencilBuffer	(DE_NULL)
 	, m_refRenderer			(DE_NULL)
 	, m_iterNdx				(0)
 {
 	m_callLogWrapper.enableLogging(ENABLE_CALL_LOG);
 }

 RandomFragmentOpCase::~RandomFragmentOpCase (void)
 {
 	delete m_renderer;
 	delete m_refColorBuffer;
 	delete m_refDepthBuffer;
 	delete m_refStencilBuffer;
 	delete m_refRenderer;
 }

 void RandomFragmentOpCase::init (void)
 {
 	DE_ASSERT(!m_renderer && !m_refColorBuffer && !m_refDepthBuffer && !m_refStencilBuffer && !m_refRenderer);

 	int		width	= de::min<int>(m_context.getRenderTarget().getWidth(), VIEWPORT_WIDTH);
 	int		height	= de::min<int>(m_context.getRenderTarget().getHeight(), VIEWPORT_HEIGHT);
 	bool	useRGB	= m_context.getRenderTarget().getPixelFormat().alphaBits == 0;

 	m_renderer			= new gls::FragmentOpUtil::QuadRenderer(m_context.getRenderContext(), glu::GLSL_VERSION_100_ES);
 	m_refColorBuffer	= new tcu::TextureLevel(tcu::TextureFormat(useRGB ? tcu::TextureFormat::RGB : tcu::TextureFormat::RGBA, tcu::TextureFormat::UNORM_INT8), width, height);
 	m_refDepthBuffer	= new tcu::TextureLevel(tcu::TextureFormat(tcu::TextureFormat::D, tcu::TextureFormat::FLOAT),			width, height);
 	m_refStencilBuffer	= new tcu::TextureLevel(tcu::TextureFormat(tcu::TextureFormat::S, tcu::TextureFormat::UNSIGNED_INT32),	width, height);
 	m_refRenderer		= new gls::FragmentOpUtil::ReferenceQuadRenderer();
 	m_iterNdx			= 0;

 	m_testCtx.setTestResult(QP_TEST_RESULT_PASS, "Pass");
 }

 void RandomFragmentOpCase::deinit (void)
 {
 	delete m_renderer;
 	delete m_refColorBuffer;
 	delete m_refDepthBuffer;
 	delete m_refStencilBuffer;
 	delete m_refRenderer;

 	m_renderer			= DE_NULL;
 	m_refColorBuffer	= DE_NULL;
 	m_refDepthBuffer	= DE_NULL;
 	m_refStencilBuffer	= DE_NULL;
 	m_refRenderer		= DE_NULL;
 }

 RandomFragmentOpCase::IterateResult RandomFragmentOpCase::iterate (void)
 {
 	const glw::Functions&	gl				= m_context.getRenderContext().getFunctions();
 	const bool				isMSAA			= m_context.getRenderTarget().getNumSamples() > 1;
 	const deUint32			iterSeed		= deUint32Hash(m_seed) ^ deInt32Hash(m_iterNdx) ^ deInt32Hash(m_testCtx.getCommandLine().getBaseSeed());
 	de::Random				rnd				(iterSeed);

 	const int				width			= m_refColorBuffer->getWidth();
 	const int				height			= m_refColorBuffer->getHeight();
 	const int				viewportX		= rnd.getInt(0, m_context.getRenderTarget().getWidth()-width);
 	const int				viewportY		= rnd.getInt(0, m_context.getRenderTarget().getHeight()-height);

 	tcu::Surface			renderedImg		(width, height);
 	tcu::Surface			referenceImg	(width, height);

 	const Vec4				clearColor		= CLEAR_COLOR;
 	const float				clearDepth		= CLEAR_DEPTH;
 	const int				clearStencil	= CLEAR_STENCIL;

 	bool					gotError		= false;

 	const tcu::ScopedLogSection	iterSection	(m_testCtx.getLog(), std::string("Iteration") + de::toString(m_iterNdx), std::string("Iteration ") + de::toString(m_iterNdx));

 	// Compute randomized rendering commands.
 	vector<RenderCommand> commands;
 	computeRandomRenderCommands(rnd, glu::ApiType::es(2,0), NUM_CALLS_PER_ITERATION, width, height, commands);

 	// Reset default fragment state.
 	gl.disable(GL_SCISSOR_TEST);
 	gl.colorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
 	gl.depthMask(GL_TRUE);
 	gl.stencilMask(~0u);

 	// Render using GL.
 	m_callLogWrapper.glClearColor(clearColor.x(), clearColor.y(), clearColor.z(), clearColor.w());
 	m_callLogWrapper.glClearDepthf(clearDepth);
 	m_callLogWrapper.glClearStencil(clearStencil);
 	m_callLogWrapper.glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT|GL_STENCIL_BUFFER_BIT);
 	m_callLogWrapper.glViewport(viewportX, viewportY, width, height);

 	for (vector<RenderCommand>::const_iterator cmd = commands.begin(); cmd != commands.end(); cmd++)
 	{
 		setGLState(m_callLogWrapper, cmd->state, viewportX, viewportY);

 		if (ENABLE_CALL_LOG)
 			m_testCtx.getLog() << TestLog::Message << "// Quad: " << cmd->quad.posA << " -> " << cmd->quad.posB
 												   << ", color: [" << cmd->quad.color[0] << ", " << cmd->quad.color[1] << ", " << cmd->quad.color[2] << ", " << cmd->quad.color[3] << "]"
 												   << ", depth: [" << cmd->quad.depth[0] << ", " << cmd->quad.depth[1] << ", " << cmd->quad.depth[2] << ", " << cmd->quad.depth[3] << "]"
 								<< TestLog::EndMessage;

 		renderQuad(gl, *m_renderer, cmd->quad, viewportX, viewportY);
 	}

 	// Check error.
 	if (m_callLogWrapper.glGetError() != GL_NO_ERROR)
 		gotError = true;

 	gl.flush();

 	// Render reference while GPU is doing work.
 	tcu::clear			(m_refColorBuffer->getAccess(),		clearColor);
 	tcu::clearDepth		(m_refDepthBuffer->getAccess(),		clearDepth);
 	tcu::clearStencil	(m_refStencilBuffer->getAccess(),	clearStencil);

 	for (vector<RenderCommand>::const_iterator cmd = commands.begin(); cmd != commands.end(); cmd++)
 	{
 		rr::FragmentOperationState refState;
 		translateState(cmd->state, refState, m_context.getRenderTarget());
 		m_refRenderer->render(gls::FragmentOpUtil::getMultisampleAccess(m_refColorBuffer->getAccess()),
 							  gls::FragmentOpUtil::getMultisampleAccess(m_refDepthBuffer->getAccess()),
 							  gls::FragmentOpUtil::getMultisampleAccess(m_refStencilBuffer->getAccess()),
 							  cmd->quad, refState);
 	}

 	// Expand reference color buffer to RGBA8
 	copy(referenceImg.getAccess(), m_refColorBuffer->getAccess());

 	// Read rendered image.
 	glu::readPixels(m_context.getRenderContext(), viewportX, viewportY, renderedImg.getAccess());

 	m_iterNdx += 1;

 	// Compare to reference.
 	bool				isLastIter	= m_iterNdx >= NUM_ITERATIONS_PER_CASE;
 	const tcu::UVec4	threshold	= getCompareThreshold();
 	bool				compareOk;

 	if (isMSAA)
 	{
 		// in MSAA cases, the sampling points could be anywhere in the pixel and we could
 		// even have multiple samples that are combined in resolve. Allow arbitrary sample
 		// positions by using bilinearCompare.
 		compareOk = tcu::bilinearCompare(m_testCtx.getLog(),
 										 "CompareResult",
 										 "Image Comparison Result",
 										 referenceImg.getAccess(),
 										 renderedImg.getAccess(),
 										 tcu::RGBA(threshold.x(), threshold.y(), threshold.z(), threshold.w()),
 										 tcu::COMPARE_LOG_RESULT);
 	}
 	else
 		compareOk = tcu::intThresholdCompare(m_testCtx.getLog(),
 											 "CompareResult",
 											 "Image Comparison Result",
 											 referenceImg.getAccess(),
 											 renderedImg.getAccess(),
 											 threshold,
 											 tcu::COMPARE_LOG_RESULT);

 	m_testCtx.getLog() << TestLog::Message << (compareOk ? "  Passed." : "  FAILED!") << TestLog::EndMessage;

 	if (!compareOk)
 		m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Image comparison failed");
 	else if (gotError)
 		m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "GL error");

 	if (compareOk && !gotError && !isLastIter)
 		return CONTINUE;
 	else
 		return STOP;
 }

 tcu::UVec4 RandomFragmentOpCase::getCompareThreshold (void) const
 {
 	tcu::PixelFormat format = m_context.getRenderTarget().getPixelFormat();

 	if (format == tcu::PixelFormat(8, 8, 8, 8) || format == tcu::PixelFormat(8, 8, 8, 0))
 		return format.getColorThreshold().toIVec().asUint() + tcu::UVec4(6); // Default threshold.
 	else
 		return format.getColorThreshold().toIVec().asUint()
 			   * tcu::UVec4(5) + tcu::UVec4(2); // \note Non-scientific ad hoc formula. Need big threshold when few color bits; especially multiple blendings bring extra inaccuracy.
 }

 RandomFragmentOpTests::RandomFragmentOpTests (Context& context)
 	: TestCaseGroup(context, "random", "Randomized Per-Fragment Operation Tests")
 {
 }

 RandomFragmentOpTests::~RandomFragmentOpTests (void)
 {
 }

 void RandomFragmentOpTests::init (void)
 {
 	for (int ndx = 0; ndx < 100; ndx++)
 		addChild(new RandomFragmentOpCase(m_context, de::toString(ndx).c_str(), "", (deUint32)(ndx*NUM_ITERATIONS_PER_CASE)));
 }

 } // Functional
 } // gles2
 } // deqp
	/*-------------------------------------------------------------------------
	* drawElements Quality Program OpenGL ES 3.0 Module
	* -------------------------------------------------
	*
	* Copyright 2014 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.
	*
	//!
	* \file
	* \brief Randomized per-fragment operation tests.
	//--------------------------------------------------------------------*/

	#include "es2fRandomFragmentOpTests.hpp"
	#include "glsFragmentOpUtil.hpp"
	#include "glsInteractionTestUtil.hpp"
	#include "tcuRenderTarget.hpp"
	#include "tcuTestLog.hpp"
	#include "tcuSurface.hpp"
	#include "tcuCommandLine.hpp"
	#include "tcuImageCompare.hpp"
	#include "tcuVectorUtil.hpp"
	#include "tcuTextureUtil.hpp"
	#include "gluPixelTransfer.hpp"
	#include "gluCallLogWrapper.hpp"
	#include "gluRenderContext.hpp"
	#include "deStringUtil.hpp"
	#include "deRandom.hpp"
	#include "deMath.h"
	#include "glwFunctions.hpp"
	#include "glwEnums.hpp"
	#include "rrFragmentOperations.hpp"
	#include "sglrReferenceUtils.hpp"

	#include <algorithm>

	namespace deqp
	{
	namespace gles2
	{
	namespace Functional
	{

	using std::vector;
	using tcu::TestLog;
	using tcu::Vec2;
	using tcu::Vec4;
	using tcu::IVec2;
	using tcu::BVec4;

	enum
	{
	VIEWPORT_WIDTH = 64,
	VIEWPORT_HEIGHT = 64,
	NUM_CALLS_PER_ITERATION = 3,
	NUM_ITERATIONS_PER_CASE = 10
	};

	static const tcu::Vec4 CLEAR_COLOR (0.25f, 0.5f, 0.75f, 1.0f);
	static const float CLEAR_DEPTH = 1.0f;
	static const int CLEAR_STENCIL = 0;
	static const bool ENABLE_CALL_LOG = true;

	using namespace gls::FragmentOpUtil;
	using namespace gls::InteractionTestUtil;

	void translateStencilState (const StencilState& src, rr::StencilState& dst)
	{
	dst.func = sglr::rr_util::mapGLTestFunc(src.function);
	dst.ref = src.reference;
	dst.compMask = src.compareMask;
	dst.sFail = sglr::rr_util::mapGLStencilOp(src.stencilFailOp);
	dst.dpFail = sglr::rr_util::mapGLStencilOp(src.depthFailOp);
	dst.dpPass = sglr::rr_util::mapGLStencilOp(src.depthPassOp);
	dst.writeMask = src.writeMask;
	}

	void translateBlendState (const BlendState& src, rr::BlendState& dst)
	{
	dst.equation = sglr::rr_util::mapGLBlendEquation(src.equation);
	dst.srcFunc = sglr::rr_util::mapGLBlendFunc(src.srcFunc);
	dst.dstFunc = sglr::rr_util::mapGLBlendFunc(src.dstFunc);
	}

	void translateState (const RenderState& src, rr::FragmentOperationState& dst, const tcu::RenderTarget& renderTarget)
	{
	bool hasDepth = renderTarget.getDepthBits() > 0;
	bool hasStencil = renderTarget.getStencilBits() > 0;

	dst.scissorTestEnabled = src.scissorTestEnabled;
	dst.scissorRectangle = src.scissorRectangle;
	dst.stencilTestEnabled = hasStencil && src.stencilTestEnabled;
	dst.depthTestEnabled = hasDepth && src.depthTestEnabled;
	dst.blendMode = src.blendEnabled ? rr::BLENDMODE_STANDARD : rr::BLENDMODE_NONE;
	dst.numStencilBits = renderTarget.getStencilBits();

	dst.colorMask = src.colorMask;

	if (dst.depthTestEnabled)
	{
	dst.depthFunc = sglr::rr_util::mapGLTestFunc(src.depthFunc);
	dst.depthMask = src.depthWriteMask;
	}

	if (dst.stencilTestEnabled)
	{
	translateStencilState(src.stencil[rr::FACETYPE_BACK], dst.stencilStates[rr::FACETYPE_BACK]);
	translateStencilState(src.stencil[rr::FACETYPE_FRONT], dst.stencilStates[rr::FACETYPE_FRONT]);
	}

	if (src.blendEnabled)
	{
	translateBlendState(src.blendRGBState, dst.blendRGBState);
	translateBlendState(src.blendAState, dst.blendAState);
	dst.blendColor = tcu::clamp(src.blendColor, Vec4(0.0f), Vec4(1.0f));
	}
	}

	static void renderQuad (const glw::Functions& gl, gls::FragmentOpUtil::QuadRenderer& renderer, const gls::FragmentOpUtil::IntegerQuad& quad, int baseX, int baseY)
	{
	gls::FragmentOpUtil::Quad translated;

	std::copy(DE_ARRAY_BEGIN(quad.color), DE_ARRAY_END(quad.color), DE_ARRAY_BEGIN(translated.color));

	bool flipX = quad.posB.x() < quad.posA.x();
	bool flipY = quad.posB.y() < quad.posA.y();
	int viewportX = de::min(quad.posA.x(), quad.posB.x());
	int viewportY = de::min(quad.posA.y(), quad.posB.y());
	int viewportW = de::abs(quad.posA.x()-quad.posB.x())+1;
	int viewportH = de::abs(quad.posA.y()-quad.posB.y())+1;

	translated.posA = Vec2(flipX ? 1.0f : -1.0f, flipY ? 1.0f : -1.0f);
	translated.posB = Vec2(flipX ? -1.0f : 1.0f, flipY ? -1.0f : 1.0f);

	// \todo [2012-12-18 pyry] Pass in DepthRange parameters.
	for (int ndx = 0; ndx < DE_LENGTH_OF_ARRAY(quad.depth); ndx++)
	translated.depth[ndx] = quad.depth[ndx]*2.0f - 1.0f;

	gl.viewport(baseX+viewportX, baseY+viewportY, viewportW, viewportH);
	renderer.render(translated);
	}

	static void setGLState (glu::CallLogWrapper& wrapper, const RenderState& state, int viewportX, int viewportY)
	{
	if (state.scissorTestEnabled)
	{
	wrapper.glEnable(GL_SCISSOR_TEST);
	wrapper.glScissor(viewportX+state.scissorRectangle.left, viewportY+state.scissorRectangle.bottom,
	state.scissorRectangle.width, state.scissorRectangle.height);
	}
	else
	wrapper.glDisable(GL_SCISSOR_TEST);

	if (state.stencilTestEnabled)
	{
	wrapper.glEnable(GL_STENCIL_TEST);

	for (int face = 0; face < rr::FACETYPE_LAST; face++)
	{
	deUint32 glFace = face == rr::FACETYPE_BACK ? GL_BACK : GL_FRONT;
	const StencilState& sParams = state.stencil[face];

	wrapper.glStencilFuncSeparate(glFace, sParams.function, sParams.reference, sParams.compareMask);
	wrapper.glStencilOpSeparate(glFace, sParams.stencilFailOp, sParams.depthFailOp, sParams.depthPassOp);
	wrapper.glStencilMaskSeparate(glFace, sParams.writeMask);
	}
	}
	else
	wrapper.glDisable(GL_STENCIL_TEST);

	if (state.depthTestEnabled)
	{
	wrapper.glEnable(GL_DEPTH_TEST);
	wrapper.glDepthFunc(state.depthFunc);
	wrapper.glDepthMask(state.depthWriteMask ? GL_TRUE : GL_FALSE);
	}
	else
	wrapper.glDisable(GL_DEPTH_TEST);

	if (state.blendEnabled)
	{
	wrapper.glEnable(GL_BLEND);
	wrapper.glBlendEquationSeparate(state.blendRGBState.equation, state.blendAState.equation);
	wrapper.glBlendFuncSeparate(state.blendRGBState.srcFunc, state.blendRGBState.dstFunc, state.blendAState.srcFunc, state.blendAState.dstFunc);
	wrapper.glBlendColor(state.blendColor.x(), state.blendColor.y(), state.blendColor.z(), state.blendColor.w());
	}
	else
	wrapper.glDisable(GL_BLEND);

	if (state.ditherEnabled)
	wrapper.glEnable(GL_DITHER);
	else
	wrapper.glDisable(GL_DITHER);

	wrapper.glColorMask(state.colorMask[0] ? GL_TRUE : GL_FALSE,
	state.colorMask[1] ? GL_TRUE : GL_FALSE,
	state.colorMask[2] ? GL_TRUE : GL_FALSE,
	state.colorMask[3] ? GL_TRUE : GL_FALSE);
	}

	class RandomFragmentOpCase : public TestCase
	{
	public:
	RandomFragmentOpCase (Context& context, const char* name, const char* desc, deUint32 seed);
	~RandomFragmentOpCase (void);

	void init (void);
	void deinit (void);
	IterateResult iterate (void);

	private:
	tcu::UVec4 getCompareThreshold (void) const;

	deUint32 m_seed;

	glu::CallLogWrapper m_callLogWrapper;

	gls::FragmentOpUtil::QuadRenderer* m_renderer;
	tcu::TextureLevel* m_refColorBuffer;
	tcu::TextureLevel* m_refDepthBuffer;
	tcu::TextureLevel* m_refStencilBuffer;
	gls::FragmentOpUtil::ReferenceQuadRenderer* m_refRenderer;

	int m_iterNdx;
	};

	RandomFragmentOpCase::RandomFragmentOpCase (Context& context, const char* name, const char* desc, deUint32 seed)
	: TestCase (context, name, desc)
	, m_seed (seed)
	, m_callLogWrapper (context.getRenderContext().getFunctions(), context.getTestContext().getLog())
	, m_renderer (DE_NULL)
	, m_refColorBuffer (DE_NULL)
	, m_refDepthBuffer (DE_NULL)
	, m_refStencilBuffer (DE_NULL)
	, m_refRenderer (DE_NULL)
	, m_iterNdx (0)
	{
	m_callLogWrapper.enableLogging(ENABLE_CALL_LOG);
	}

	RandomFragmentOpCase::~RandomFragmentOpCase (void)
	{
	delete m_renderer;
	delete m_refColorBuffer;
	delete m_refDepthBuffer;
	delete m_refStencilBuffer;
	delete m_refRenderer;
	}

	void RandomFragmentOpCase::init (void)
	{
	DE_ASSERT(!m_renderer && !m_refColorBuffer && !m_refDepthBuffer && !m_refStencilBuffer && !m_refRenderer);

	int width = de::min<int>(m_context.getRenderTarget().getWidth(), VIEWPORT_WIDTH);
	int height = de::min<int>(m_context.getRenderTarget().getHeight(), VIEWPORT_HEIGHT);
	bool useRGB = m_context.getRenderTarget().getPixelFormat().alphaBits == 0;

	m_renderer = new gls::FragmentOpUtil::QuadRenderer(m_context.getRenderContext(), glu::GLSL_VERSION_100_ES);
	m_refColorBuffer = new tcu::TextureLevel(tcu::TextureFormat(useRGB ? tcu::TextureFormat::RGB : tcu::TextureFormat::RGBA, tcu::TextureFormat::UNORM_INT8), width, height);
	m_refDepthBuffer = new tcu::TextureLevel(tcu::TextureFormat(tcu::TextureFormat::D, tcu::TextureFormat::FLOAT), width, height);
	m_refStencilBuffer = new tcu::TextureLevel(tcu::TextureFormat(tcu::TextureFormat::S, tcu::TextureFormat::UNSIGNED_INT32), width, height);
	m_refRenderer = new gls::FragmentOpUtil::ReferenceQuadRenderer();
	m_iterNdx = 0;

	m_testCtx.setTestResult(QP_TEST_RESULT_PASS, "Pass");
	}

	void RandomFragmentOpCase::deinit (void)
	{
	delete m_renderer;
	delete m_refColorBuffer;
	delete m_refDepthBuffer;
	delete m_refStencilBuffer;
	delete m_refRenderer;

	m_renderer = DE_NULL;
	m_refColorBuffer = DE_NULL;
	m_refDepthBuffer = DE_NULL;
	m_refStencilBuffer = DE_NULL;
	m_refRenderer = DE_NULL;
	}

	RandomFragmentOpCase::IterateResult RandomFragmentOpCase::iterate (void)
	{
	const glw::Functions& gl = m_context.getRenderContext().getFunctions();
	const bool isMSAA = m_context.getRenderTarget().getNumSamples() > 1;
	const deUint32 iterSeed = deUint32Hash(m_seed) ^ deInt32Hash(m_iterNdx) ^ deInt32Hash(m_testCtx.getCommandLine().getBaseSeed());
	de::Random rnd (iterSeed);

	const int width = m_refColorBuffer->getWidth();
	const int height = m_refColorBuffer->getHeight();
	const int viewportX = rnd.getInt(0, m_context.getRenderTarget().getWidth()-width);
	const int viewportY = rnd.getInt(0, m_context.getRenderTarget().getHeight()-height);

	tcu::Surface renderedImg (width, height);
	tcu::Surface referenceImg (width, height);

	const Vec4 clearColor = CLEAR_COLOR;
	const float clearDepth = CLEAR_DEPTH;
	const int clearStencil = CLEAR_STENCIL;

	bool gotError = false;

	const tcu::ScopedLogSection iterSection (m_testCtx.getLog(), std::string("Iteration") + de::toString(m_iterNdx), std::string("Iteration ") + de::toString(m_iterNdx));

	// Compute randomized rendering commands.
	vector<RenderCommand> commands;
	computeRandomRenderCommands(rnd, glu::ApiType::es(2,0), NUM_CALLS_PER_ITERATION, width, height, commands);

	// Reset default fragment state.
	gl.disable(GL_SCISSOR_TEST);
	gl.colorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
	gl.depthMask(GL_TRUE);
	gl.stencilMask(~0u);

	// Render using GL.
	m_callLogWrapper.glClearColor(clearColor.x(), clearColor.y(), clearColor.z(), clearColor.w());
	m_callLogWrapper.glClearDepthf(clearDepth);
	m_callLogWrapper.glClearStencil(clearStencil);
	m_callLogWrapper.glClear(GL_COLOR_BUFFER_BIT\|GL_DEPTH_BUFFER_BIT\|GL_STENCIL_BUFFER_BIT);
	m_callLogWrapper.glViewport(viewportX, viewportY, width, height);

	for (vector<RenderCommand>::const_iterator cmd = commands.begin(); cmd != commands.end(); cmd++)
	{
	setGLState(m_callLogWrapper, cmd->state, viewportX, viewportY);

	if (ENABLE_CALL_LOG)
	m_testCtx.getLog() << TestLog::Message << "// Quad: " << cmd->quad.posA << " -> " << cmd->quad.posB
	<< ", color: [" << cmd->quad.color[0] << ", " << cmd->quad.color[1] << ", " << cmd->quad.color[2] << ", " << cmd->quad.color[3] << "]"
	<< ", depth: [" << cmd->quad.depth[0] << ", " << cmd->quad.depth[1] << ", " << cmd->quad.depth[2] << ", " << cmd->quad.depth[3] << "]"
	<< TestLog::EndMessage;

	renderQuad(gl, *m_renderer, cmd->quad, viewportX, viewportY);
	}

	// Check error.
	if (m_callLogWrapper.glGetError() != GL_NO_ERROR)
	gotError = true;

	gl.flush();

	// Render reference while GPU is doing work.
	tcu::clear (m_refColorBuffer->getAccess(), clearColor);
	tcu::clearDepth (m_refDepthBuffer->getAccess(), clearDepth);
	tcu::clearStencil (m_refStencilBuffer->getAccess(), clearStencil);

	for (vector<RenderCommand>::const_iterator cmd = commands.begin(); cmd != commands.end(); cmd++)
	{
	rr::FragmentOperationState refState;
	translateState(cmd->state, refState, m_context.getRenderTarget());
	m_refRenderer->render(gls::FragmentOpUtil::getMultisampleAccess(m_refColorBuffer->getAccess()),
	gls::FragmentOpUtil::getMultisampleAccess(m_refDepthBuffer->getAccess()),
	gls::FragmentOpUtil::getMultisampleAccess(m_refStencilBuffer->getAccess()),
	cmd->quad, refState);
	}

	// Expand reference color buffer to RGBA8
	copy(referenceImg.getAccess(), m_refColorBuffer->getAccess());

	// Read rendered image.
	glu::readPixels(m_context.getRenderContext(), viewportX, viewportY, renderedImg.getAccess());

	m_iterNdx += 1;

	// Compare to reference.
	bool isLastIter = m_iterNdx >= NUM_ITERATIONS_PER_CASE;
	const tcu::UVec4 threshold = getCompareThreshold();
	bool compareOk;

	if (isMSAA)
	{
	// in MSAA cases, the sampling points could be anywhere in the pixel and we could
	// even have multiple samples that are combined in resolve. Allow arbitrary sample
	// positions by using bilinearCompare.
	compareOk = tcu::bilinearCompare(m_testCtx.getLog(),
	"CompareResult",
	"Image Comparison Result",
	referenceImg.getAccess(),
	renderedImg.getAccess(),
	tcu::RGBA(threshold.x(), threshold.y(), threshold.z(), threshold.w()),
	tcu::COMPARE_LOG_RESULT);
	}
	else
	compareOk = tcu::intThresholdCompare(m_testCtx.getLog(),
	"CompareResult",
	"Image Comparison Result",
	referenceImg.getAccess(),
	renderedImg.getAccess(),
	threshold,
	tcu::COMPARE_LOG_RESULT);

	m_testCtx.getLog() << TestLog::Message << (compareOk ? " Passed." : " FAILED!") << TestLog::EndMessage;

	if (!compareOk)
	m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Image comparison failed");
	else if (gotError)
	m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "GL error");

	if (compareOk && !gotError && !isLastIter)
	return CONTINUE;
	else
	return STOP;
	}

	tcu::UVec4 RandomFragmentOpCase::getCompareThreshold (void) const
	{
	tcu::PixelFormat format = m_context.getRenderTarget().getPixelFormat();

	if (format == tcu::PixelFormat(8, 8, 8, 8) \|\| format == tcu::PixelFormat(8, 8, 8, 0))
	return format.getColorThreshold().toIVec().asUint() + tcu::UVec4(6); // Default threshold.
	else
	return format.getColorThreshold().toIVec().asUint()
	* tcu::UVec4(5) + tcu::UVec4(2); // \note Non-scientific ad hoc formula. Need big threshold when few color bits; especially multiple blendings bring extra inaccuracy.
	}

	RandomFragmentOpTests::RandomFragmentOpTests (Context& context)
	: TestCaseGroup(context, "random", "Randomized Per-Fragment Operation Tests")
	{
	}

	RandomFragmentOpTests::~RandomFragmentOpTests (void)
	{
	}

	void RandomFragmentOpTests::init (void)
	{
	for (int ndx = 0; ndx < 100; ndx++)
	addChild(new RandomFragmentOpCase(m_context, de::toString(ndx).c_str(), "", (deUint32)(ndx*NUM_ITERATIONS_PER_CASE)));
	}

	} // Functional
	} // gles2
	} // deqp