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      1 /*-------------------------------------------------------------------------
      2  * drawElements Quality Program OpenGL ES 3.0 Module
      3  * -------------------------------------------------
      4  *
      5  * Copyright 2014 The Android Open Source Project
      6  *
      7  * Licensed under the Apache License, Version 2.0 (the "License");
      8  * you may not use this file except in compliance with the License.
      9  * You may obtain a copy of the License at
     10  *
     11  *      http://www.apache.org/licenses/LICENSE-2.0
     12  *
     13  * Unless required by applicable law or agreed to in writing, software
     14  * distributed under the License is distributed on an "AS IS" BASIS,
     15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     16  * See the License for the specific language governing permissions and
     17  * limitations under the License.
     18  *
     19  *//*!
     20  * \file
     21  * \brief Blend tests.
     22  *//*--------------------------------------------------------------------*/
     23 
     24 #include "es3fBlendTests.hpp"
     25 #include "gluStrUtil.hpp"
     26 #include "glsFragmentOpUtil.hpp"
     27 #include "gluPixelTransfer.hpp"
     28 #include "tcuPixelFormat.hpp"
     29 #include "tcuTexture.hpp"
     30 #include "tcuTextureUtil.hpp"
     31 #include "tcuImageCompare.hpp"
     32 #include "tcuRenderTarget.hpp"
     33 #include "tcuTestLog.hpp"
     34 #include "deRandom.hpp"
     35 #include "rrFragmentOperations.hpp"
     36 #include "sglrReferenceUtils.hpp"
     37 
     38 #include <string>
     39 #include <vector>
     40 
     41 #include "glw.h"
     42 
     43 namespace deqp
     44 {
     45 
     46 using gls::FragmentOpUtil::Quad;
     47 using gls::FragmentOpUtil::IntegerQuad;
     48 using gls::FragmentOpUtil::QuadRenderer;
     49 using gls::FragmentOpUtil::ReferenceQuadRenderer;
     50 using glu::getBlendEquationName;
     51 using glu::getBlendFactorName;
     52 using tcu::Vec4;
     53 using tcu::UVec4;
     54 using tcu::TestLog;
     55 using tcu::TextureLevel;
     56 using tcu::TextureFormat;
     57 using std::string;
     58 using std::vector;
     59 
     60 namespace gles3
     61 {
     62 namespace Functional
     63 {
     64 
     65 static const int MAX_VIEWPORT_WIDTH		= 64;
     66 static const int MAX_VIEWPORT_HEIGHT	= 64;
     67 
     68 // \note src and dst can point to same memory as long as there is 1-to-1 correspondence between
     69 //		 pixels.
     70 static void sRGBAToLinear (const tcu::PixelBufferAccess& dst, const tcu::ConstPixelBufferAccess& src)
     71 {
     72 	const int	width	= src.getWidth();
     73 	const int	height	= src.getHeight();
     74 
     75 	for (int y = 0; y < height; y++)
     76 	for (int x = 0; x < width; x++)
     77 		dst.setPixel(tcu::sRGBToLinear(src.getPixel(x, y)), x, y);
     78 }
     79 
     80 struct BlendParams
     81 {
     82 	GLenum	equationRGB;
     83 	GLenum	srcFuncRGB;
     84 	GLenum	dstFuncRGB;
     85 	GLenum	equationAlpha;
     86 	GLenum	srcFuncAlpha;
     87 	GLenum	dstFuncAlpha;
     88 	Vec4	blendColor;
     89 
     90 	BlendParams (GLenum		equationRGB_,
     91 				 GLenum		srcFuncRGB_,
     92 				 GLenum		dstFuncRGB_,
     93 				 GLenum		equationAlpha_,
     94 				 GLenum		srcFuncAlpha_,
     95 				 GLenum		dstFuncAlpha_,
     96 				 Vec4		blendColor_)
     97 	: equationRGB	(equationRGB_)
     98 	, srcFuncRGB	(srcFuncRGB_)
     99 	, dstFuncRGB	(dstFuncRGB_)
    100 	, equationAlpha	(equationAlpha_)
    101 	, srcFuncAlpha	(srcFuncAlpha_)
    102 	, dstFuncAlpha	(dstFuncAlpha_)
    103 	, blendColor	(blendColor_)
    104 	{
    105 	}
    106 };
    107 
    108 class BlendCase : public TestCase
    109 {
    110 public:
    111 							BlendCase	(Context&						context,
    112 										 const char*					name,
    113 										 const char*					desc,
    114 										 const vector<BlendParams>&		paramSets,
    115 										 bool							useSrgbFbo);
    116 
    117 							~BlendCase	(void);
    118 
    119 	void					init		(void);
    120 	void					deinit		(void);
    121 
    122 	IterateResult			iterate		(void);
    123 
    124 private:
    125 							BlendCase	(const BlendCase& other);
    126 	BlendCase&				operator=	(const BlendCase& other);
    127 
    128 	vector<BlendParams>		m_paramSets;
    129 	int						m_curParamSetNdx;
    130 
    131 	bool					m_useSrgbFbo;
    132 	deUint32				m_colorRbo;
    133 	deUint32				m_fbo;
    134 
    135 	QuadRenderer*			m_renderer;
    136 	ReferenceQuadRenderer*	m_referenceRenderer;
    137 	TextureLevel*			m_refColorBuffer;
    138 	Quad					m_firstQuad;
    139 	Quad					m_secondQuad;
    140 	IntegerQuad				m_firstQuadInt;
    141 	IntegerQuad				m_secondQuadInt;
    142 
    143 	int						m_renderWidth;
    144 	int						m_renderHeight;
    145 	int						m_viewportWidth;
    146 	int						m_viewportHeight;
    147 };
    148 
    149 BlendCase::BlendCase (Context&						context,
    150 					  const char*					name,
    151 					  const char*					desc,
    152 					  const vector<BlendParams>&	paramSets,
    153 					  bool							useSrgbFbo)
    154 	: TestCase				(context, name, desc)
    155 	, m_paramSets			(paramSets)
    156 	, m_curParamSetNdx		(0)
    157 	, m_useSrgbFbo			(useSrgbFbo)
    158 	, m_colorRbo			(0)
    159 	, m_fbo					(0)
    160 	, m_renderer			(DE_NULL)
    161 	, m_referenceRenderer	(DE_NULL)
    162 	, m_refColorBuffer		(DE_NULL)
    163 	, m_renderWidth			(m_useSrgbFbo ? 2*MAX_VIEWPORT_WIDTH	: m_context.getRenderTarget().getWidth())
    164 	, m_renderHeight		(m_useSrgbFbo ? 2*MAX_VIEWPORT_HEIGHT	: m_context.getRenderTarget().getHeight())
    165 	, m_viewportWidth		(0)
    166 	, m_viewportHeight		(0)
    167 {
    168 	DE_ASSERT(!m_paramSets.empty());
    169 }
    170 
    171 void BlendCase::init (void)
    172 {
    173 	bool useRGB = !m_useSrgbFbo && m_context.getRenderTarget().getPixelFormat().alphaBits == 0;
    174 
    175 	static const Vec4 baseGradientColors[4] =
    176 	{
    177 		Vec4(0.0f, 0.5f, 1.0f, 0.5f),
    178 		Vec4(0.5f, 0.0f, 0.5f, 1.0f),
    179 		Vec4(0.5f, 1.0f, 0.5f, 0.0f),
    180 		Vec4(1.0f, 0.5f, 0.0f, 0.5f)
    181 	};
    182 
    183 	DE_STATIC_ASSERT(DE_LENGTH_OF_ARRAY(m_firstQuad.color) == DE_LENGTH_OF_ARRAY(m_firstQuadInt.color));
    184 	for (int i = 0; i < DE_LENGTH_OF_ARRAY(m_firstQuad.color); i++)
    185 	{
    186 		m_firstQuad.color[i]		= (baseGradientColors[i] - 0.5f) * 0.2f + 0.5f;
    187 		m_firstQuadInt.color[i]		= m_firstQuad.color[i];
    188 
    189 		m_secondQuad.color[i]		= (Vec4(1.0f) - baseGradientColors[i] - 0.5f) * 1.0f + 0.5f;
    190 		m_secondQuadInt.color[i]	= m_secondQuad.color[i];
    191 	}
    192 
    193 	m_viewportWidth		= de::min<int>(m_renderWidth,	MAX_VIEWPORT_WIDTH);
    194 	m_viewportHeight	= de::min<int>(m_renderHeight,	MAX_VIEWPORT_HEIGHT);
    195 
    196 	m_firstQuadInt.posA		= tcu::IVec2(0,						0);
    197 	m_secondQuadInt.posA	= tcu::IVec2(0,						0);
    198 	m_firstQuadInt.posB		= tcu::IVec2(m_viewportWidth-1,		m_viewportHeight-1);
    199 	m_secondQuadInt.posB	= tcu::IVec2(m_viewportWidth-1,		m_viewportHeight-1);
    200 
    201 	DE_ASSERT(!m_renderer);
    202 	DE_ASSERT(!m_referenceRenderer);
    203 	DE_ASSERT(!m_refColorBuffer);
    204 
    205 	m_renderer				= new QuadRenderer(m_context.getRenderContext(), glu::GLSL_VERSION_300_ES);
    206 	m_referenceRenderer		= new ReferenceQuadRenderer;
    207 	m_refColorBuffer		= new TextureLevel(TextureFormat(m_useSrgbFbo ? TextureFormat::sRGBA : useRGB ? TextureFormat::RGB : TextureFormat::RGBA, TextureFormat::UNORM_INT8),
    208 											   m_viewportWidth, m_viewportHeight);
    209 
    210 	m_curParamSetNdx = 0;
    211 
    212 	if (m_useSrgbFbo)
    213 	{
    214 		m_testCtx.getLog() << TestLog::Message << "Using FBO of size (" << m_renderWidth << ", " << m_renderHeight << ") with format GL_SRGB8_ALPHA8" << TestLog::EndMessage;
    215 
    216 		GLU_CHECK_CALL(glGenRenderbuffers(1, &m_colorRbo));
    217 		GLU_CHECK_CALL(glBindRenderbuffer(GL_RENDERBUFFER, m_colorRbo));
    218 		GLU_CHECK_CALL(glRenderbufferStorage(GL_RENDERBUFFER, GL_SRGB8_ALPHA8, m_renderWidth, m_renderHeight));
    219 
    220 		GLU_CHECK_CALL(glGenFramebuffers(1, &m_fbo));
    221 		GLU_CHECK_CALL(glBindFramebuffer(GL_FRAMEBUFFER, m_fbo));
    222 		GLU_CHECK_CALL(glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, m_colorRbo));
    223 	}
    224 }
    225 
    226 BlendCase::~BlendCase (void)
    227 {
    228 	BlendCase::deinit();
    229 }
    230 
    231 void BlendCase::deinit (void)
    232 {
    233 	delete m_renderer;
    234 	delete m_referenceRenderer;
    235 	delete m_refColorBuffer;
    236 
    237 	m_renderer			= DE_NULL;
    238 	m_referenceRenderer	= DE_NULL;
    239 	m_refColorBuffer	= DE_NULL;
    240 
    241 	GLU_CHECK_CALL(glBindRenderbuffer(GL_RENDERBUFFER, 0));
    242 	GLU_CHECK_CALL(glBindFramebuffer(GL_FRAMEBUFFER, 0));
    243 
    244 	if (m_colorRbo != 0)
    245 	{
    246 		GLU_CHECK_CALL(glDeleteRenderbuffers(1, &m_colorRbo));
    247 		m_colorRbo = 0;
    248 	}
    249 	if (m_fbo != 0)
    250 	{
    251 		GLU_CHECK_CALL(glDeleteFramebuffers(1, &m_fbo));
    252 		m_fbo = 0;
    253 	}
    254 }
    255 
    256 BlendCase::IterateResult BlendCase::iterate (void)
    257 {
    258 	de::Random						rnd				(deStringHash(getName()) ^ deInt32Hash(m_curParamSetNdx));
    259 	int								viewportX		= rnd.getInt(0, m_renderWidth - m_viewportWidth);
    260 	int								viewportY		= rnd.getInt(0, m_renderHeight - m_viewportHeight);
    261 	TextureLevel					renderedImg		(TextureFormat(m_useSrgbFbo ? TextureFormat::sRGBA : TextureFormat::RGBA, TextureFormat::UNORM_INT8), m_viewportWidth, m_viewportHeight);
    262 	TextureLevel					referenceImg	(renderedImg.getFormat(), m_viewportWidth, m_viewportHeight);
    263 	TestLog&						log				(m_testCtx.getLog());
    264 	const BlendParams&				paramSet		= m_paramSets[m_curParamSetNdx];
    265 	rr::FragmentOperationState		referenceState;
    266 
    267 	// Log the blend parameters.
    268 
    269 	log << TestLog::Message << "RGB equation = " << getBlendEquationName(paramSet.equationRGB) << TestLog::EndMessage;
    270 	log << TestLog::Message << "RGB src func = " << getBlendFactorName(paramSet.srcFuncRGB) << TestLog::EndMessage;
    271 	log << TestLog::Message << "RGB dst func = " << getBlendFactorName(paramSet.dstFuncRGB) << TestLog::EndMessage;
    272 	log << TestLog::Message << "Alpha equation = " << getBlendEquationName(paramSet.equationAlpha) << TestLog::EndMessage;
    273 	log << TestLog::Message << "Alpha src func = " << getBlendFactorName(paramSet.srcFuncAlpha) << TestLog::EndMessage;
    274 	log << TestLog::Message << "Alpha dst func = " << getBlendFactorName(paramSet.dstFuncAlpha) << TestLog::EndMessage;
    275 	log << TestLog::Message << "Blend color = (" << paramSet.blendColor.x() << ", " << paramSet.blendColor.y() << ", " << paramSet.blendColor.z() << ", " << paramSet.blendColor.w() << ")" << TestLog::EndMessage;
    276 
    277 	// Set GL state.
    278 
    279 	GLU_CHECK_CALL(glBlendEquationSeparate(paramSet.equationRGB, paramSet.equationAlpha));
    280 	GLU_CHECK_CALL(glBlendFuncSeparate(paramSet.srcFuncRGB, paramSet.dstFuncRGB, paramSet.srcFuncAlpha, paramSet.dstFuncAlpha));
    281 	GLU_CHECK_CALL(glBlendColor(paramSet.blendColor.x(), paramSet.blendColor.y(), paramSet.blendColor.z(), paramSet.blendColor.w()));
    282 
    283 	// Set reference state.
    284 
    285 	referenceState.blendRGBState.equation	= sglr::rr_util::mapGLBlendEquation(paramSet.equationRGB);
    286 	referenceState.blendRGBState.srcFunc	= sglr::rr_util::mapGLBlendFunc(paramSet.srcFuncRGB);
    287 	referenceState.blendRGBState.dstFunc	= sglr::rr_util::mapGLBlendFunc(paramSet.dstFuncRGB);
    288 	referenceState.blendAState.equation		= sglr::rr_util::mapGLBlendEquation(paramSet.equationAlpha);
    289 	referenceState.blendAState.srcFunc		= sglr::rr_util::mapGLBlendFunc(paramSet.srcFuncAlpha);
    290 	referenceState.blendAState.dstFunc		= sglr::rr_util::mapGLBlendFunc(paramSet.dstFuncAlpha);
    291 	referenceState.blendColor				= paramSet.blendColor;
    292 
    293 	// Render with GL.
    294 
    295 	glDisable(GL_BLEND);
    296 	glViewport(viewportX, viewportY, m_viewportWidth, m_viewportHeight);
    297 	m_renderer->render(m_firstQuad);
    298 	glEnable(GL_BLEND);
    299 	m_renderer->render(m_secondQuad);
    300 	glFlush();
    301 
    302 	// Render reference.
    303 
    304 	const tcu::PixelBufferAccess nullAccess = tcu::PixelBufferAccess();
    305 
    306 	referenceState.blendMode = rr::BLENDMODE_NONE;
    307 	m_referenceRenderer->render(gls::FragmentOpUtil::getMultisampleAccess(m_refColorBuffer->getAccess()), nullAccess /* no depth */, nullAccess /* no stencil */, m_firstQuadInt, referenceState);
    308 	referenceState.blendMode = rr::BLENDMODE_STANDARD;
    309 	m_referenceRenderer->render(gls::FragmentOpUtil::getMultisampleAccess(m_refColorBuffer->getAccess()), nullAccess /* no depth */, nullAccess /* no stencil */, m_secondQuadInt, referenceState);
    310 
    311 	// Copy to reference (expansion to RGBA happens here if necessary)
    312 	copy(referenceImg, m_refColorBuffer->getAccess());
    313 
    314 	// Read GL image.
    315 
    316 	glu::readPixels(m_context.getRenderContext(), viewportX, viewportY, renderedImg.getAccess());
    317 
    318 	// Compare images.
    319 	// \note In sRGB cases, convert to linear space for comparison.
    320 
    321 	if (m_useSrgbFbo)
    322 	{
    323 		sRGBAToLinear(renderedImg, renderedImg);
    324 		sRGBAToLinear(referenceImg, referenceImg);
    325 	}
    326 
    327 	UVec4 compareThreshold = (m_useSrgbFbo ? tcu::PixelFormat(8, 8, 8, 8) : m_context.getRenderTarget().getPixelFormat()).getColorThreshold().toIVec().asUint()
    328 							 * UVec4(5) / UVec4(2) + UVec4(m_useSrgbFbo ? 5 : 2); // \note Non-scientific ad hoc formula. Need big threshold when few color bits; blending brings extra inaccuracy.
    329 
    330 	bool comparePass = tcu::intThresholdCompare(m_testCtx.getLog(), "CompareResult", "Image Comparison Result",
    331 												referenceImg.getAccess(), renderedImg.getAccess(),
    332 												compareThreshold, tcu::COMPARE_LOG_RESULT);
    333 
    334 	// Fail now if images don't match.
    335 
    336 	if (!comparePass)
    337 	{
    338 		m_context.getTestContext().setTestResult(QP_TEST_RESULT_FAIL, "Image compare failed");
    339 		return STOP;
    340 	}
    341 
    342 	// Continue if param sets still remain in m_paramSets; otherwise stop.
    343 
    344 	m_curParamSetNdx++;
    345 
    346 	if (m_curParamSetNdx < (int)m_paramSets.size())
    347 		return CONTINUE;
    348 	else
    349 	{
    350 		m_context.getTestContext().setTestResult(QP_TEST_RESULT_PASS, "Passed");
    351 		return STOP;
    352 	}
    353 }
    354 
    355 BlendTests::BlendTests (Context& context)
    356 	: TestCaseGroup(context, "blend", "Blend tests")
    357 {
    358 }
    359 
    360 BlendTests::~BlendTests (void)
    361 {
    362 }
    363 
    364 void BlendTests::init (void)
    365 {
    366 	struct EnumGL
    367 	{
    368 		GLenum			glValue;
    369 		const char*		nameStr;
    370 	};
    371 
    372 	static const EnumGL blendEquations[] =
    373 	{
    374 		{ GL_FUNC_ADD,					"add"					},
    375 		{ GL_FUNC_SUBTRACT,				"subtract"				},
    376 		{ GL_FUNC_REVERSE_SUBTRACT,		"reverse_subtract"		},
    377 		{ GL_MIN,						"min"					},
    378 		{ GL_MAX,						"max"					}
    379 	};
    380 
    381 	static const EnumGL blendFunctions[] =
    382 	{
    383 		{ GL_ZERO,							"zero"						},
    384 		{ GL_ONE,							"one"						},
    385 		{ GL_SRC_COLOR,						"src_color"					},
    386 		{ GL_ONE_MINUS_SRC_COLOR,			"one_minus_src_color"		},
    387 		{ GL_DST_COLOR,						"dst_color"					},
    388 		{ GL_ONE_MINUS_DST_COLOR,			"one_minus_dst_color"		},
    389 		{ GL_SRC_ALPHA,						"src_alpha"					},
    390 		{ GL_ONE_MINUS_SRC_ALPHA,			"one_minus_src_alpha"		},
    391 		{ GL_DST_ALPHA,						"dst_alpha"					},
    392 		{ GL_ONE_MINUS_DST_ALPHA,			"one_minus_dst_alpha"		},
    393 		{ GL_CONSTANT_COLOR,				"constant_color"			},
    394 		{ GL_ONE_MINUS_CONSTANT_COLOR,		"one_minus_constant_color"	},
    395 		{ GL_CONSTANT_ALPHA,				"constant_alpha"			},
    396 		{ GL_ONE_MINUS_CONSTANT_ALPHA,		"one_minus_constant_alpha"	},
    397 		{ GL_SRC_ALPHA_SATURATE,			"src_alpha_saturate"		}
    398 	};
    399 
    400 	const Vec4 defaultBlendColor(0.2f, 0.4f, 0.6f, 0.8f);
    401 
    402 	for (int useSrgbFboI = 0; useSrgbFboI <= 1; useSrgbFboI++)
    403 	{
    404 		bool			useSrgbFbo	= useSrgbFboI != 0;
    405 		TestCaseGroup*	fbGroup		= new TestCaseGroup(m_context, useSrgbFbo ? "fbo_srgb" : "default_framebuffer", useSrgbFbo ? "Use a FBO with GL_SRGB8_ALPHA8" : "Use the default framebuffer");
    406 		addChild(fbGroup);
    407 
    408 		// Test all blend equation, src blend function, dst blend function combinations. RGB and alpha modes are the same.
    409 
    410 		{
    411 			TestCaseGroup* group = new TestCaseGroup(m_context, "equation_src_func_dst_func", "Combinations of Blend Equations and Functions");
    412 			fbGroup->addChild(group);
    413 
    414 			for (int equationNdx = 0;	equationNdx < DE_LENGTH_OF_ARRAY(blendEquations);	equationNdx++)
    415 			for (int srcFuncNdx = 0;	srcFuncNdx < DE_LENGTH_OF_ARRAY(blendFunctions);	srcFuncNdx++)
    416 			for (int dstFuncNdx = 0;	dstFuncNdx < DE_LENGTH_OF_ARRAY(blendFunctions);	dstFuncNdx++)
    417 			{
    418 				const EnumGL& eq	= blendEquations[equationNdx];
    419 				const EnumGL& src	= blendFunctions[srcFuncNdx];
    420 				const EnumGL& dst	= blendFunctions[dstFuncNdx];
    421 
    422 				if ((eq.glValue == GL_MIN || eq.glValue == GL_MAX) && (srcFuncNdx > 0 || dstFuncNdx > 0)) // MIN and MAX don't depend on factors.
    423 					continue;
    424 
    425 				string name			= eq.nameStr;
    426 				string description	= string("") +
    427 									  "Equations "		+ getBlendEquationName(eq.glValue) +
    428 									  ", src funcs "	+ getBlendFactorName(src.glValue) +
    429 									  ", dst funcs "	+ getBlendFactorName(dst.glValue);
    430 
    431 				if (eq.glValue != GL_MIN && eq.glValue != GL_MAX)
    432 					name += string("") + "_" + src.nameStr + "_" + dst.nameStr;
    433 
    434 				vector<BlendParams> paramSets;
    435 				paramSets.push_back(BlendParams(eq.glValue, src.glValue, dst.glValue, eq.glValue, src.glValue, dst.glValue, defaultBlendColor));
    436 
    437 				group->addChild(new BlendCase(m_context, name.c_str(), description.c_str(), paramSets, useSrgbFbo));
    438 			}
    439 		}
    440 
    441 		// Test all RGB src, alpha src and RGB dst, alpha dst combinations. Equations are ADD.
    442 		// \note For all RGB src, alpha src combinations, also test a couple of different RGBA dst functions, and vice versa.
    443 
    444 		{
    445 			TestCaseGroup* mainGroup = new TestCaseGroup(m_context, "rgb_func_alpha_func", "Combinations of RGB and Alpha Functions");
    446 			fbGroup->addChild(mainGroup);
    447 			TestCaseGroup* srcGroup = new TestCaseGroup(m_context, "src", "Source functions");
    448 			TestCaseGroup* dstGroup = new TestCaseGroup(m_context, "dst", "Destination functions");
    449 			mainGroup->addChild(srcGroup);
    450 			mainGroup->addChild(dstGroup);
    451 
    452 			for (int isDstI = 0;		isDstI <= 1;										isDstI++)
    453 			for (int rgbFuncNdx = 0;	rgbFuncNdx < DE_LENGTH_OF_ARRAY(blendFunctions);	rgbFuncNdx++)
    454 			for (int alphaFuncNdx = 0;	alphaFuncNdx < DE_LENGTH_OF_ARRAY(blendFunctions);	alphaFuncNdx++)
    455 			{
    456 				bool			isSrc			= isDstI == 0;
    457 				TestCaseGroup*	curGroup		= isSrc ? srcGroup : dstGroup;
    458 				const EnumGL&	funcRGB			= blendFunctions[rgbFuncNdx];
    459 				const EnumGL&	funcAlpha		= blendFunctions[alphaFuncNdx];
    460 				const char*		dstOrSrcStr		= isSrc ? "src" : "dst";
    461 
    462 				string name			= string("") + funcRGB.nameStr + "_" + funcAlpha.nameStr;
    463 				string description	= string("") +
    464 									  "RGB "		+ dstOrSrcStr + " func " + getBlendFactorName(funcRGB.glValue) +
    465 									  ", alpha "	+ dstOrSrcStr + " func " + getBlendFactorName(funcAlpha.glValue);
    466 
    467 				// First, make param sets as if this was a src case.
    468 
    469 				vector<BlendParams> paramSets;
    470 				paramSets.push_back(BlendParams(GL_FUNC_ADD, funcRGB.glValue, GL_ONE,			GL_FUNC_ADD, funcAlpha.glValue, GL_ONE,			defaultBlendColor));
    471 				paramSets.push_back(BlendParams(GL_FUNC_ADD, funcRGB.glValue, GL_ZERO,			GL_FUNC_ADD, funcAlpha.glValue, GL_ZERO,		defaultBlendColor));
    472 				paramSets.push_back(BlendParams(GL_FUNC_ADD, funcRGB.glValue, GL_SRC_COLOR,		GL_FUNC_ADD, funcAlpha.glValue, GL_SRC_COLOR,	defaultBlendColor));
    473 				paramSets.push_back(BlendParams(GL_FUNC_ADD, funcRGB.glValue, GL_DST_COLOR,		GL_FUNC_ADD, funcAlpha.glValue, GL_DST_COLOR,	defaultBlendColor));
    474 
    475 				// Swap src and dst params if this is a dst case.
    476 
    477 				if (!isSrc)
    478 				{
    479 					for (int i = 0; i < (int)paramSets.size(); i++)
    480 					{
    481 						std::swap(paramSets[i].srcFuncRGB,		paramSets[i].dstFuncRGB);
    482 						std::swap(paramSets[i].srcFuncAlpha,	paramSets[i].dstFuncAlpha);
    483 					}
    484 				}
    485 
    486 				curGroup->addChild(new BlendCase(m_context, name.c_str(), description.c_str(), paramSets, useSrgbFbo));
    487 			}
    488 		}
    489 
    490 		// Test all RGB and alpha equation combinations. Src and dst funcs are ONE for both.
    491 
    492 		{
    493 			TestCaseGroup* group = new TestCaseGroup(m_context, "rgb_equation_alpha_equation", "Combinations of RGB and Alpha Equation Combinations");
    494 			fbGroup->addChild(group);
    495 
    496 			for (int equationRGBNdx = 0;	equationRGBNdx < DE_LENGTH_OF_ARRAY(blendEquations);	equationRGBNdx++)
    497 			for (int equationAlphaNdx = 0;	equationAlphaNdx < DE_LENGTH_OF_ARRAY(blendEquations);	equationAlphaNdx++)
    498 			{
    499 				const EnumGL& eqRGB			= blendEquations[equationRGBNdx];
    500 				const EnumGL& eqAlpha		= blendEquations[equationAlphaNdx];
    501 
    502 				string name			= string("") + eqRGB.nameStr + "_" + eqAlpha.nameStr;
    503 				string description	= string("") +
    504 									  "RGB equation "		+ getBlendEquationName(eqRGB.glValue) +
    505 									  ", alpha equation "	+ getBlendEquationName(eqAlpha.glValue);
    506 
    507 				vector<BlendParams> paramSets;
    508 				paramSets.push_back(BlendParams(eqRGB.glValue, GL_ONE, GL_ONE, eqAlpha.glValue, GL_ONE, GL_ONE, defaultBlendColor));
    509 
    510 				group->addChild(new BlendCase(m_context, name.c_str(), description.c_str(), paramSets, useSrgbFbo));
    511 			}
    512 		}
    513 	}
    514 }
    515 
    516 } // Functional
    517 } // gles3
    518 } // deqp
    519