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      1 /*-------------------------------------------------------------------------
      2  * drawElements Quality Program OpenGL ES 3.1 Module
      3  * -------------------------------------------------
      4  *
      5  * Copyright 2017 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 FBO sRGB tests.
     22 *//*--------------------------------------------------------------------*/
     23 
     24 #include "es31fFboSRGBWriteControlTests.hpp"
     25 #include "es31fFboTestUtil.hpp"
     26 #include "gluTextureUtil.hpp"
     27 #include "gluContextInfo.hpp"
     28 #include "tcuTestLog.hpp"
     29 #include "glwEnums.hpp"
     30 #include "sglrContextUtil.hpp"
     31 #include "glwFunctions.hpp"
     32 #include "deUniquePtr.hpp"
     33 #include "deSharedPtr.hpp"
     34 #include "gluObjectWrapper.hpp"
     35 #include "gluPixelTransfer.hpp"
     36 #include "glsTextureTestUtil.hpp"
     37 #include "tcuVectorUtil.hpp"
     38 #include "gluStrUtil.hpp"
     39 
     40 namespace deqp
     41 {
     42 namespace gles31
     43 {
     44 namespace Functional
     45 {
     46 namespace
     47 {
     48 
     49 tcu::Vec4 getTestColorLinear (void)
     50 {
     51 	return tcu::Vec4(0.2f, 0.3f, 0.4f, 1.0f);
     52 }
     53 
     54 tcu::Vec4 getTestColorSRGB (void)
     55 {
     56 	return linearToSRGB(tcu::Vec4(0.2f, 0.3f, 0.4f, 1.0f));
     57 }
     58 
     59 tcu::Vec4 getTestColorBlank (void)
     60 {
     61 	return tcu::Vec4(0.0f, 0.0f, 0.0f, 1.0f);
     62 }
     63 
     64 tcu::Vec4 getEpsilonError (void)
     65 {
     66 	return tcu::Vec4(0.005f);
     67 }
     68 
     69 enum QueryType
     70 {
     71 	QUERYTYPE_ISENABLED = 0,
     72 	QUERYTYPE_BOOLEAN,
     73 	QUERYTYPE_FLOAT,
     74 	QUERYTYPE_INT,
     75 	QUERYTYPE_INT64,
     76 	QUERYTYPE_LAST
     77 };
     78 
     79 enum DataType
     80 {
     81 	DATATYPE_BOOLEAN = 0,
     82 	DATATYPE_FLOAT,
     83 	DATATYPE_INT,
     84 	DATATYPE_INT64,
     85 };
     86 
     87 enum FramebufferSRGB
     88 {
     89 	FRAMEBUFFERSRGB_ENABLED = 0,
     90 	FRAMEBUFFERSRGB_DISABLED
     91 };
     92 
     93 enum FramebufferBlend
     94 {
     95 	FRAMEBUFFERBLEND_ENABLED = 0,
     96 	FRAMEBUFFERBLEND_DISABLED
     97 };
     98 
     99 enum TextureSourcesType
    100 {
    101 	TEXTURESOURCESTYPE_RGBA		= 0,
    102 	TEXTURESOURCESTYPE_SRGBA,
    103 	TEXTURESOURCESTYPE_BOTH,
    104 	TEXTURESOURCESTYPE_NONE
    105 };
    106 
    107 enum FboType
    108 {
    109 	FBOTYPE_SOURCE			= 0,
    110 	FBOTYPE_DESTINATION
    111 };
    112 
    113 enum RendererTask
    114 {
    115 	RENDERERTASK_DRAW = 0,
    116 	RENDERERTASK_COPY
    117 };
    118 
    119 enum SamplingType
    120 {
    121 	SAMPLINGTYPE_TEXTURE			= 0,
    122 	SAMPLINGTYPE_TEXTURE_LOD,
    123 	SAMPLINGTYPE_TEXTURE_GRAD,
    124 	SAMPLINGTYPE_TEXTURE_OFFSET,
    125 	SAMPLINGTYPE_TEXTURE_PROJ,
    126 };
    127 
    128 namespace TestTextureSizes
    129 {
    130 	const int WIDTH = 128;
    131 	const int HEIGHT = 128;
    132 } // global test texture sizes
    133 
    134 namespace SampligTypeCount
    135 {
    136 	const int MAX = 5;
    137 } // global max number of sampling types
    138 
    139 std::string buildSamplingPassType (const int samplerTotal)
    140 {
    141 	std::ostringstream	shaderFragment;
    142 
    143 	const SamplingType	samplingTypeList [] =
    144 	{
    145 		SAMPLINGTYPE_TEXTURE, SAMPLINGTYPE_TEXTURE_LOD, SAMPLINGTYPE_TEXTURE_GRAD, SAMPLINGTYPE_TEXTURE_OFFSET, SAMPLINGTYPE_TEXTURE_PROJ
    146 	} ;
    147 
    148 	for (int samplerTypeIdx = 0; samplerTypeIdx < DE_LENGTH_OF_ARRAY(samplingTypeList); samplerTypeIdx++)
    149 	{
    150 		shaderFragment
    151 			<< "	if (uFunctionType == " << samplerTypeIdx << ") \n"
    152 			<< "	{ \n";
    153 
    154 		for (int samplerIdx = 0; samplerIdx < samplerTotal; samplerIdx++)
    155 		{
    156 			switch (static_cast<SamplingType>(samplerTypeIdx))
    157 			{
    158 				case SAMPLINGTYPE_TEXTURE:
    159 				{
    160 					shaderFragment
    161 						<< "		texelColor" << samplerIdx << " = texture(uTexture" << samplerIdx << ", vs_aTexCoord); \n";
    162 					break;
    163 				}
    164 				case SAMPLINGTYPE_TEXTURE_LOD:
    165 				{
    166 					shaderFragment
    167 						<< "		texelColor" << samplerIdx << " = textureLod(uTexture" << samplerIdx << ", vs_aTexCoord, 0.0f); \n";
    168 					break;
    169 				}
    170 				case SAMPLINGTYPE_TEXTURE_GRAD:
    171 				{
    172 					shaderFragment
    173 						<< "		texelColor" << samplerIdx << " = textureGrad(uTexture" << samplerIdx << ", vs_aTexCoord, vec2(0.0f, 0.0f), vec2(0.0f, 0.0f)); \n";
    174 					break;
    175 				}
    176 				case SAMPLINGTYPE_TEXTURE_OFFSET:
    177 				{
    178 					shaderFragment
    179 						<< "		texelColor" << samplerIdx << " = textureOffset(uTexture" << samplerIdx << ", vs_aTexCoord, ivec2(0.0f, 0.0f)); \n";
    180 					break;
    181 				}
    182 				case SAMPLINGTYPE_TEXTURE_PROJ:
    183 				{
    184 					shaderFragment
    185 						<< "		texelColor" << samplerIdx << " = textureProj(uTexture" << samplerIdx << ", vec3(vs_aTexCoord, 1.0f)); \n";
    186 					break;
    187 				}
    188 				default:
    189 					DE_FATAL("Error: sampling type unrecognised");
    190 			}
    191 		}
    192 
    193 		shaderFragment
    194 			<< "	} \n";
    195 	}
    196 
    197 	return shaderFragment.str();
    198 }
    199 
    200 void logColor (Context& context, const std::string& colorLogMessage, const tcu::Vec4 resultColor)
    201 {
    202 	tcu::TestLog&			log		= context.getTestContext().getLog();
    203 	std::ostringstream		message;
    204 
    205 	message << colorLogMessage << " = (" << resultColor.x() << ", " << resultColor.y() << ", " << resultColor.z() << ", " << resultColor.w() << ")";
    206 		log << tcu::TestLog::Message << message.str() << tcu::TestLog::EndMessage;
    207 }
    208 
    209 struct TestFunction
    210 {
    211 	explicit TestFunction	(const bool hasFunctionValue)
    212 		: hasFunction		(hasFunctionValue) {}
    213 	TestFunction			(const char* const functionNameValue, const char* const functionDefinition)
    214 		: hasFunction		(true)
    215 		, functionName		(functionNameValue)
    216 		, functionDefintion	(functionDefinition) {}
    217 	~TestFunction			(void) {}
    218 
    219 	bool			hasFunction;
    220 	const char*		functionName;
    221 	const char*		functionDefintion;
    222 };
    223 
    224 TestFunction getFunctionBlendLinearToSRGBCheck (void)
    225 {
    226 	const char* const functionName = "blendPlusLinearToSRGB";
    227 
    228 	const char* const functionDefinition =
    229 		"mediump vec4 blendPlusLinearToSRGB(in mediump vec4 colorSrc, in mediump vec4 colorDst) \n"
    230 		"{ \n"
    231 		"	const int MAX_VECTOR_SIZE = 4; \n"
    232 		"	mediump vec4 colorConverted; \n"
    233 		"	mediump vec4 colorBlended; \n"
    234 		"	for (int idx = 0; idx < MAX_VECTOR_SIZE; idx++) \n"
    235 		"	{ \n"
    236 		"		if (uBlendFunctionType == 0) \n"
    237 		"		{ \n"
    238 		"			colorBlended[idx] = (colorSrc[idx] * uFactorSrc) + colorDst[idx] * uFactorDst; \n"
    239 		"		} \n"
    240 		"		if (uBlendFunctionType == 1) \n"
    241 		"		{ \n"
    242 		"			colorBlended[idx] = (colorSrc[idx] * uFactorSrc) - (colorDst[idx] * uFactorDst); \n"
    243 		"		} \n"
    244 				"if (uBlendFunctionType == 2) \n"
    245 		"		{ \n"
    246 		"			colorBlended[idx] = (colorDst[idx] * uFactorDst) - (colorSrc[idx] * uFactorSrc); \n"
    247 		"		} \n"
    248 		"		if (colorBlended[idx] < 0.0031308f) \n"
    249 		"		{ \n"
    250 		"			colorConverted[idx] = 12.92f * colorBlended[idx]; \n"
    251 		"		} \n"
    252 		"		else \n"
    253 		"		{ \n"
    254 		"			colorConverted[idx] = 1.055f * pow(colorBlended[idx], 0.41666f) - 0.055f; \n"
    255 		"		} \n"
    256 		"	} \n"
    257 		"	return colorConverted; \n"
    258 		"} \n";
    259 
    260 	TestFunction testFunction(functionName, functionDefinition);
    261 
    262 	return testFunction;
    263 }
    264 
    265 struct FBOConfig
    266 {
    267 	FBOConfig					(const deUint32 textureInternalFormatValue,
    268 								 const tcu::Vec4 textureColorValue,
    269 								 const deUint32 fboTargetTypeValue,
    270 								 const deUint32 fboColorAttachmentValue,
    271 								 const FboType fboTypeValue)
    272 		: textureInternalFormat	(textureInternalFormatValue)
    273 		, textureColor			(textureColorValue)
    274 		, fboTargetType			(fboTargetTypeValue)
    275 		, fboColorAttachment	(fboColorAttachmentValue)
    276 		, fboType				(fboTypeValue) {}
    277 	~FBOConfig					(void) {}
    278 
    279 	deUint32	textureInternalFormat;
    280 	tcu::Vec4	textureColor;
    281 	deUint32	fboTargetType;
    282 	deUint32	fboColorAttachment;
    283 	FboType		fboType;
    284 };
    285 
    286 struct BlendConfig
    287 {
    288 	deUint32	equation;
    289 	deUint32	funcSrc;
    290 	deUint32	funcDst;
    291 };
    292 
    293 std::vector<BlendConfig> getBlendingConfigList (void)
    294 {
    295 	BlendConfig blendConfigs[12];
    296 
    297 	// add function permutations
    298 	blendConfigs[0].equation = GL_FUNC_ADD;
    299 	blendConfigs[1].equation = GL_FUNC_ADD;
    300 	blendConfigs[2].equation = GL_FUNC_ADD;
    301 	blendConfigs[3].equation = GL_FUNC_ADD;
    302 
    303 	blendConfigs[0].funcSrc = GL_ONE;
    304 	blendConfigs[0].funcDst = GL_ONE;
    305 	blendConfigs[1].funcSrc = GL_ONE;
    306 	blendConfigs[1].funcDst = GL_ZERO;
    307 	blendConfigs[2].funcSrc = GL_ZERO;
    308 	blendConfigs[2].funcDst = GL_ONE;
    309 	blendConfigs[3].funcSrc = GL_ZERO;
    310 	blendConfigs[3].funcDst = GL_ZERO;
    311 
    312 	// subtract function permutations
    313 	blendConfigs[4].equation = GL_FUNC_SUBTRACT;
    314 	blendConfigs[5].equation = GL_FUNC_SUBTRACT;
    315 	blendConfigs[6].equation = GL_FUNC_SUBTRACT;
    316 	blendConfigs[7].equation = GL_FUNC_SUBTRACT;
    317 
    318 	blendConfigs[4].funcSrc = GL_ONE;
    319 	blendConfigs[4].funcDst = GL_ONE;
    320 	blendConfigs[5].funcSrc = GL_ONE;
    321 	blendConfigs[5].funcDst = GL_ZERO;
    322 	blendConfigs[6].funcSrc = GL_ZERO;
    323 	blendConfigs[6].funcDst = GL_ONE;
    324 	blendConfigs[7].funcSrc = GL_ZERO;
    325 	blendConfigs[7].funcDst = GL_ZERO;
    326 
    327 	// reverse subtract function permutations
    328 	blendConfigs[8].equation = GL_FUNC_REVERSE_SUBTRACT;
    329 	blendConfigs[9].equation = GL_FUNC_REVERSE_SUBTRACT;
    330 	blendConfigs[10].equation = GL_FUNC_REVERSE_SUBTRACT;
    331 	blendConfigs[11].equation = GL_FUNC_REVERSE_SUBTRACT;
    332 
    333 	blendConfigs[8].funcSrc = GL_ONE;
    334 	blendConfigs[8].funcDst = GL_ONE;
    335 	blendConfigs[9].funcSrc = GL_ONE;
    336 	blendConfigs[9].funcDst = GL_ZERO;
    337 	blendConfigs[10].funcSrc = GL_ZERO;
    338 	blendConfigs[10].funcDst = GL_ONE;
    339 	blendConfigs[11].funcSrc = GL_ZERO;
    340 	blendConfigs[11].funcDst = GL_ZERO;
    341 
    342 	std::vector<BlendConfig> configList(blendConfigs, blendConfigs + DE_LENGTH_OF_ARRAY(blendConfigs));
    343 
    344 	return configList;
    345 }
    346 
    347 struct TestRenderPassConfig
    348 {
    349 	TestRenderPassConfig		(void)
    350 		: testFunction			(false) {}
    351 
    352 	TestRenderPassConfig		(const TextureSourcesType textureSourcesTypeValue,
    353 								FBOConfig fboConfigListValue,
    354 								const FramebufferSRGB framebufferSRGBValue,
    355 								const FramebufferBlend framebufferBendValue,
    356 								const RendererTask rendererTaskValue)
    357 		: textureSourcesType	(textureSourcesTypeValue)
    358 		, framebufferSRGB		(framebufferSRGBValue)
    359 		, frameBufferBlend		(framebufferBendValue)
    360 		, testFunction			(false)
    361 		, rendererTask			(rendererTaskValue) {fboConfigList.push_back(fboConfigListValue);}
    362 
    363 	TestRenderPassConfig		(const TextureSourcesType textureSourcesTypeValue,
    364 								FBOConfig fboConfigListValue,
    365 								const FramebufferSRGB framebufferSRGBValue,
    366 								const FramebufferBlend framebufferBendValue,
    367 								TestFunction testFunctionValue,
    368 								const RendererTask rendererTaskValue)
    369 		: textureSourcesType	(textureSourcesTypeValue)
    370 		, framebufferSRGB		(framebufferSRGBValue)
    371 		, frameBufferBlend		(framebufferBendValue)
    372 		, testFunction			(testFunctionValue)
    373 		, rendererTask			(rendererTaskValue) {fboConfigList.push_back(fboConfigListValue);}
    374 
    375 	TestRenderPassConfig		(const TextureSourcesType textureSourcesTypeValue,
    376 								std::vector<FBOConfig> fboConfigListValue,
    377 								const FramebufferSRGB framebufferSRGBValue,
    378 								const FramebufferBlend framebufferBendValue,
    379 								TestFunction testFunctionValue,
    380 								const RendererTask rendererTaskValue)
    381 		: textureSourcesType	(textureSourcesTypeValue)
    382 		, fboConfigList			(fboConfigListValue)
    383 		, framebufferSRGB		(framebufferSRGBValue)
    384 		, frameBufferBlend		(framebufferBendValue)
    385 		, testFunction			(testFunctionValue)
    386 		, rendererTask			(rendererTaskValue) {}
    387 
    388 	~TestRenderPassConfig		(void) {}
    389 
    390 	TextureSourcesType		textureSourcesType;
    391 	std::vector<FBOConfig>	fboConfigList;
    392 	FramebufferSRGB			framebufferSRGB;
    393 	FramebufferBlend		frameBufferBlend;
    394 	TestFunction			testFunction;
    395 	RendererTask			rendererTask;
    396 };
    397 
    398 class TestVertexData
    399 {
    400 public:
    401 							TestVertexData		(Context& context);
    402 							~TestVertexData		(void);
    403 
    404 	void					init				(void);
    405 
    406 	void					bind				(void) const;
    407 	void					unbind				(void) const;
    408 
    409 private:
    410 	const glw::Functions*	m_gl;
    411 	std::vector<float>		m_data;
    412 	glw::GLuint				m_vboHandle;
    413 	glw::GLuint				m_vaoHandle;
    414 };
    415 
    416 TestVertexData::TestVertexData	(Context& context)
    417 	: m_gl						(&context.getRenderContext().getFunctions())
    418 {
    419 	const glw::GLfloat		vertexData[]	=
    420 	{
    421 		// position				// texcoord
    422 		-1.0f, -1.0f, 0.0f,		0.0f, 0.0f, // bottom left corner
    423 		 1.0f, -1.0f, 0.0f,		1.0f, 0.0f, // bottom right corner
    424 		 1.0f,  1.0f, 0.0f,		1.0f, 1.0f, // Top right corner
    425 
    426 		-1.0f,  1.0f, 0.0f,		0.0f, 1.0f, // top left corner
    427 		 1.0f,  1.0f, 0.0f,		1.0f, 1.0f, // Top right corner
    428 		-1.0f, -1.0f, 0.0f,		0.0f, 0.0f  // bottom left corner
    429 	};
    430 
    431 	m_data.resize(DE_LENGTH_OF_ARRAY(vertexData));
    432 	for (int idx = 0; idx < (int)m_data.size(); idx++)
    433 		m_data[idx] = vertexData[idx];
    434 
    435 	m_gl->genVertexArrays(1, &m_vaoHandle);
    436 	m_gl->bindVertexArray(m_vaoHandle);
    437 
    438 	m_gl->genBuffers(1, &m_vboHandle);
    439 	m_gl->bindBuffer(GL_ARRAY_BUFFER, m_vboHandle);
    440 
    441 	m_gl->bufferData(GL_ARRAY_BUFFER, (glw::GLsizei)(m_data.size() * sizeof(glw::GLfloat)), &m_data[0], GL_STATIC_DRAW);
    442 
    443 	m_gl->enableVertexAttribArray(0);
    444 	m_gl->vertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 5 * (glw::GLsizei)sizeof(GL_FLOAT), (glw::GLvoid *)0);
    445 	m_gl->enableVertexAttribArray(1);
    446 	m_gl->vertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 5 * (glw::GLsizei)sizeof(GL_FLOAT), (glw::GLvoid *)(3 * sizeof(GL_FLOAT)));
    447 
    448 	m_gl->bindVertexArray(0);
    449 	m_gl->bindBuffer(GL_ARRAY_BUFFER, 0);
    450 	GLU_EXPECT_NO_ERROR(m_gl->getError(), "gl error during vertex data setup");
    451 }
    452 
    453 TestVertexData::~TestVertexData (void)
    454 {
    455 	m_gl->deleteBuffers(1, &m_vboHandle);
    456 	m_gl->deleteVertexArrays(1, &m_vaoHandle);
    457 }
    458 
    459 void TestVertexData::bind (void) const
    460 {
    461 	m_gl->bindVertexArray(m_vaoHandle);
    462 }
    463 
    464 void TestVertexData::unbind (void) const
    465 {
    466 	m_gl->bindVertexArray(0);
    467 }
    468 
    469 class TestTexture2D
    470 {
    471 public:
    472 								TestTexture2D		(Context& context, const deUint32 internalFormatValue, const deUint32 transferFormatValue, const deUint32 transferTypeValue, const tcu::Vec4 imageColorValue);
    473 								~TestTexture2D		(void);
    474 
    475 	int							getTextureUnit		(void) const;
    476 	deUint32					getHandle			(void) const;
    477 
    478 	void						bind				(const int textureUnit);
    479 	void						unbind				(void) const;
    480 
    481 private:
    482 	const glw::Functions*		m_gl;
    483 	glw::GLuint					m_handle;
    484 	const deUint32				m_internalFormat;
    485 	tcu::TextureFormat			m_transferFormat;
    486 	int							m_width;
    487 	int							m_height;
    488 	tcu::TextureLevel			m_imageData;
    489 	int							m_textureUnit;
    490 };
    491 
    492 TestTexture2D::TestTexture2D	(Context& context, const deUint32 internalFormat, const deUint32 transferFormat, const deUint32 transferType, const tcu::Vec4 imageColor)
    493 	: m_gl						(&context.getRenderContext().getFunctions())
    494 	, m_internalFormat			(internalFormat)
    495 	, m_transferFormat			(tcu::TextureFormat(glu::mapGLTransferFormat(transferFormat, transferType)))
    496 	, m_width					(TestTextureSizes::WIDTH)
    497 	, m_height					(TestTextureSizes::HEIGHT)
    498 	, m_imageData				(tcu::TextureLevel(glu::mapGLInternalFormat(internalFormat), m_width, m_height, 1))
    499 {
    500 	// fill image data with a solid test color
    501 	tcu::clear(m_imageData.getAccess(), tcu::Vec4(0.0f));
    502 	for (int py = 0; py < m_imageData.getHeight(); py++)
    503 	{
    504 		for (int px = 0; px < m_imageData.getWidth(); px++)
    505 			m_imageData.getAccess().setPixel(imageColor, px, py);
    506 	}
    507 
    508 	m_gl->genTextures(1, &m_handle);
    509 
    510 	m_gl->bindTexture(GL_TEXTURE_2D, m_handle);
    511 	m_gl->texParameteri(GL_TEXTURE_2D,	GL_TEXTURE_WRAP_S,		GL_MIRRORED_REPEAT);
    512 	m_gl->texParameteri(GL_TEXTURE_2D,	GL_TEXTURE_WRAP_T,		GL_MIRRORED_REPEAT);
    513 	m_gl->texParameteri(GL_TEXTURE_2D,	GL_TEXTURE_MIN_FILTER,	GL_NEAREST);
    514 	m_gl->texParameteri(GL_TEXTURE_2D,	GL_TEXTURE_MAG_FILTER,	GL_NEAREST);
    515 
    516 	m_gl->texImage2D(GL_TEXTURE_2D, 0, m_internalFormat, m_width, m_height, 0, transferFormat, transferType, m_imageData.getAccess().getDataPtr());
    517 
    518 	m_gl->bindTexture(GL_TEXTURE_2D, 0);
    519 }
    520 
    521 TestTexture2D::~TestTexture2D (void)
    522 {
    523 	m_gl->deleteTextures(1, &m_handle);
    524 }
    525 
    526 int TestTexture2D::getTextureUnit (void) const
    527 {
    528 	return m_textureUnit;
    529 }
    530 
    531 deUint32 TestTexture2D::getHandle (void) const
    532 {
    533 	return m_handle;
    534 }
    535 
    536 void TestTexture2D::bind (const int textureUnit)
    537 {
    538 	m_textureUnit = textureUnit;
    539 	m_gl->activeTexture(GL_TEXTURE0 + m_textureUnit);
    540 	m_gl->bindTexture(GL_TEXTURE_2D, m_handle);
    541 }
    542 
    543 void TestTexture2D::unbind (void) const
    544 {
    545 	m_gl->bindTexture(GL_TEXTURE_2D, 0);
    546 }
    547 
    548 class TestFramebuffer
    549 {
    550 public:
    551 												TestFramebuffer			(void);
    552 												TestFramebuffer			(Context& context, const deUint32 targetType, const deUint32 colorAttachment, glw::GLuint textureAttachmentHandle, const bool isSRGB, const FboType fboType, const int idx);
    553 												~TestFramebuffer		(void);
    554 
    555 	void										setTargetType			(const deUint32 targetType);
    556 
    557 	FboType										getType					(void) const;
    558 	deUint32									getColorAttachment		(void) const;
    559 	int											getIdx					(void) const;
    560 
    561 	void										bind					(void);
    562 	void										unbind					(void);
    563 
    564 	typedef de::UniquePtr<glu::Framebuffer>		fboUniquePtr;
    565 
    566 private:
    567 	const glw::Functions*						m_gl;
    568 	fboUniquePtr								m_referenceSource;
    569 	deUint32									m_targetType;
    570 	bool										m_bound;
    571 	bool										m_isSRGB;
    572 	FboType										m_type;
    573 	const int									m_idx;
    574 	deUint32									m_colorAttachment;
    575 };
    576 
    577 TestFramebuffer::TestFramebuffer	(Context& context, const deUint32 targetType, const deUint32 colorAttachment, glw::GLuint textureAttachmentHandle, const bool isSRGB, const FboType fboType, const int idx)
    578 	: m_gl							(&context.getRenderContext().getFunctions())
    579 	, m_referenceSource				(new glu::Framebuffer(context.getRenderContext()))
    580 	, m_targetType					(targetType)
    581 	, m_bound						(false)
    582 	, m_isSRGB						(isSRGB)
    583 	, m_type						(fboType)
    584 	, m_idx							(idx)
    585 	, m_colorAttachment				(colorAttachment)
    586 {
    587 	m_gl->bindFramebuffer(m_targetType, **m_referenceSource);
    588 
    589 	m_gl->framebufferTexture2D(m_targetType, m_colorAttachment, GL_TEXTURE_2D, textureAttachmentHandle, 0);
    590 
    591 	TCU_CHECK(m_gl->checkFramebufferStatus(m_targetType) == GL_FRAMEBUFFER_COMPLETE);
    592 
    593 	if (targetType == GL_DRAW_BUFFER)
    594 	{
    595 		glw::GLuint textureAttachments[] = {m_colorAttachment};
    596 		m_gl->drawBuffers(DE_LENGTH_OF_ARRAY(textureAttachments), textureAttachments);
    597 		GLU_EXPECT_NO_ERROR(m_gl->getError(), "glDrawBuffer()");
    598 	}
    599 
    600 	if (targetType == GL_READ_BUFFER)
    601 	{
    602 		m_gl->readBuffer(m_colorAttachment);
    603 		GLU_EXPECT_NO_ERROR(m_gl->getError(), "glReadBuffer()");
    604 	}
    605 
    606 	m_gl->bindFramebuffer(m_targetType, 0);
    607 }
    608 
    609 TestFramebuffer::~TestFramebuffer (void)
    610 {
    611 }
    612 
    613 void TestFramebuffer::setTargetType (const deUint32 targetType)
    614 {
    615 	m_targetType = targetType;
    616 }
    617 
    618 FboType TestFramebuffer::getType (void) const
    619 {
    620 	return m_type;
    621 }
    622 
    623 deUint32 TestFramebuffer::getColorAttachment (void) const
    624 {
    625 	return m_colorAttachment;
    626 }
    627 
    628 int TestFramebuffer::getIdx (void) const
    629 {
    630 	return m_idx;
    631 }
    632 
    633 void TestFramebuffer::bind (void)
    634 {
    635 	if (!m_bound)
    636 	{
    637 		m_gl->bindFramebuffer(m_targetType, **m_referenceSource);
    638 		m_bound = true;
    639 	}
    640 }
    641 
    642 void TestFramebuffer::unbind (void)
    643 {
    644 	if (m_bound)
    645 	{
    646 		m_gl->bindFramebuffer(m_targetType, 0);
    647 		m_bound = false;
    648 	}
    649 }
    650 
    651 class TestShaderProgram
    652 {
    653 public:
    654 										TestShaderProgram		(Context& context, const int samplerTotal, TestFunction testFunction);
    655 										~TestShaderProgram		(void);
    656 
    657 	glw::GLuint							getHandle				(void) const;
    658 
    659 	void								use						(void) const;
    660 	void								unuse					(void) const;
    661 
    662 	glu::ShaderProgramInfo				getLogInfo				(void);
    663 
    664 private:
    665 	const glw::Functions*				m_gl;
    666 	de::MovePtr<glu::ShaderProgram>		m_referenceSource;
    667 	const int							m_samplerTotal;
    668 	const int							m_shaderStagesTotal;
    669 };
    670 
    671 TestShaderProgram::TestShaderProgram	(Context& context, const int samplerTotal, TestFunction testFunction)
    672 	: m_gl								(&context.getRenderContext().getFunctions())
    673 	, m_samplerTotal					(samplerTotal)
    674 	, m_shaderStagesTotal				(2)
    675 {
    676 	std::ostringstream		shaderFragment;
    677 
    678 	const char* const shaderVertex =
    679 		"#version 310 es \n"
    680 		"layout (location = 0) in mediump vec3 aPosition; \n"
    681 		"layout (location = 1) in mediump vec2 aTexCoord; \n"
    682 		"out mediump vec2 vs_aTexCoord; \n"
    683 		"void main () \n"
    684 		"{ \n"
    685 		"	gl_Position = vec4(aPosition, 1.0f); \n"
    686 		"	vs_aTexCoord = aTexCoord; \n"
    687 		"} \n";
    688 
    689 	shaderFragment
    690 		<< "#version 310 es \n"
    691 		<< "in mediump vec2 vs_aTexCoord; \n"
    692 		<< "layout (location = 0) out mediump vec4 fs_aColor0; \n";
    693 
    694 	for (int samplerIdx = 0; samplerIdx < m_samplerTotal; samplerIdx++)
    695 		shaderFragment
    696 			<< "uniform sampler2D uTexture" << samplerIdx << "; \n";
    697 
    698 	shaderFragment
    699 		<< "uniform int uFunctionType; \n";
    700 
    701 	if (testFunction.hasFunction)
    702 		shaderFragment
    703 		<< "uniform int uBlendFunctionType; \n"
    704 		<< "uniform mediump float uFactorSrc; \n"
    705 		<< "uniform mediump float uFactorDst; \n"
    706 			<< testFunction.functionDefintion;
    707 
    708 	shaderFragment
    709 		<< "void main () \n"
    710 		<< "{ \n";
    711 
    712 	for (int samplerIdx = 0; samplerIdx < m_samplerTotal; samplerIdx++)
    713 		shaderFragment
    714 			<<"	mediump vec4 texelColor" << samplerIdx << " = vec4(0.0f, 0.0f, 0.0f, 1.0f); \n";
    715 
    716 	shaderFragment
    717 		<< buildSamplingPassType(m_samplerTotal);
    718 
    719 	if (testFunction.hasFunction)
    720 		shaderFragment
    721 			<< "	fs_aColor0 = " << testFunction.functionName << "(texelColor0, texelColor1); \n";
    722 	else
    723 		shaderFragment
    724 			<< "	fs_aColor0 = texelColor0; \n";
    725 
    726 	shaderFragment
    727 		<< "} \n";
    728 
    729 	m_referenceSource = de::MovePtr<glu::ShaderProgram>(new glu::ShaderProgram(context.getRenderContext(), glu::makeVtxFragSources(shaderVertex, shaderFragment.str())));
    730 	if (!m_referenceSource->isOk())
    731 	{
    732 		tcu::TestLog& log = context.getTestContext().getLog();
    733 		log << this->getLogInfo();
    734 		TCU_FAIL("Failed to compile shaders and link program");
    735 	}
    736 }
    737 
    738 TestShaderProgram::~TestShaderProgram (void)
    739 {
    740 	m_referenceSource = de::MovePtr<glu::ShaderProgram>(DE_NULL);
    741 	m_referenceSource.clear();
    742 }
    743 
    744 deUint32 TestShaderProgram::getHandle (void) const
    745 {
    746 	return m_referenceSource->getProgram();
    747 }
    748 
    749 void TestShaderProgram::use (void) const
    750 {
    751 	m_gl->useProgram(this->getHandle());
    752 }
    753 
    754 void TestShaderProgram::unuse (void) const
    755 {
    756 	m_gl->useProgram(0);
    757 }
    758 
    759 glu::ShaderProgramInfo TestShaderProgram::getLogInfo (void)
    760 {
    761 	glu::ShaderProgramInfo	buildInfo;
    762 
    763 	// log shader program info. Only vertex and fragment shaders included
    764 	buildInfo.program = m_referenceSource->getProgramInfo();
    765 	for (int shaderIdx = 0; shaderIdx < m_shaderStagesTotal; shaderIdx++)
    766 	{
    767 		glu::ShaderInfo shaderInfo = m_referenceSource->getShaderInfo(static_cast<glu::ShaderType>(static_cast<int>(glu::SHADERTYPE_VERTEX) + static_cast<int>(shaderIdx)), 0);
    768 		buildInfo.shaders.push_back(shaderInfo);
    769 	}
    770 	return buildInfo;
    771 }
    772 
    773 class Renderer
    774 {
    775 public:
    776 											Renderer						(Context& context);
    777 											~Renderer						(void);
    778 
    779 	void									init							(const TestRenderPassConfig& renderPassConfig, const int renderpass);
    780 	void									deinit							(void);
    781 
    782 	void									setSamplingType					(const SamplingType samplerIdx);
    783 	void									setBlendIteration				(const int blendIteration);
    784 	void									setFramebufferBlend				(const bool blend);
    785 	void									setFramebufferSRGB				(const bool sRGB);
    786 
    787 	std::vector<tcu::Vec4>					getResultsPreDraw				(void) const;
    788 	std::vector<tcu::Vec4>					getResultsPostDraw				(void) const;
    789 	int										getBlendConfigCount				(void) const;
    790 	glu::ShaderProgramInfo					getShaderProgramInfo			(void);
    791 
    792 	void									copyFrameBufferTexture			(const int srcPx, const int srcPy, const int dstPx, const int dstPy);
    793 	void									draw							(void);
    794 	void									storeShaderProgramInfo			(void);
    795 	void									logShaderProgramInfo			(void);
    796 
    797 	typedef de::SharedPtr<TestTexture2D>	TextureSp;
    798 	typedef de::SharedPtr<TestFramebuffer>	FboSp;
    799 
    800 private:
    801 	void									createFBOwithColorAttachment	(const std::vector<FBOConfig> fboConfigList);
    802 	void									setShaderProgramSamplingType	(const int samplerIdx);
    803 	void									setShaderBlendFunctionType		(void);
    804 	void									setShaderBlendSrcDstValues		(void);
    805 	void									bindActiveTexturesSamplers		(void);
    806 	void									bindAllRequiredSourceTextures	(const TextureSourcesType texturesRequired);
    807 	void									unbindAllSourceTextures			(void);
    808 	void									bindFramebuffer					(const int framebufferIdx);
    809 	void									unbindFramebuffer				(const int framebufferIdx);
    810 	void									enableFramebufferSRGB			(void);
    811 	void									enableFramebufferBlend			(void);
    812 	bool									isFramebufferAttachmentSRGB		(const deUint32 targetType, const deUint32 attachment) const;
    813 	void									readTexels						(const int px, const int py, const deUint32 attachment, tcu::Vec4& texelData);
    814 	void									logState						(const deUint32 targetType, const deUint32 attachment, const SamplingType samplingType) const;
    815 
    816 	// renderer specific constants initialized during constructor
    817 	Context&								m_context;
    818 	const TestVertexData					m_vertexData;
    819 	const int								m_textureSourceTotal;
    820 
    821 	// additional resources monitored by the renderer
    822 	std::vector<BlendConfig>				m_blendConfigList;
    823 	std::vector<TextureSp>					m_textureSourceList;
    824 	TestRenderPassConfig					m_renderPassConfig;
    825 	std::vector<TextureSp>					m_fboTextureList;
    826 	TestShaderProgram*						m_shaderProgram;
    827 	std::vector<FboSp>						m_framebufferList;
    828 	std::vector<tcu::Vec4>					m_resultsListPreDraw;
    829 	std::vector<tcu::Vec4>					m_resultsListPostDraw;
    830 
    831 	// mutable state variables (internal access only)
    832 	bool									m_hasShaderProgramInfo;
    833 	int										m_renderPass;
    834 	int										m_samplersRequired;
    835 	bool									m_hasFunction;
    836 	bool									m_blittingEnabled;
    837 	glu::ShaderProgramInfo					m_shaderProgramInfo;
    838 
    839 	// mutable state variables (external access via setters)
    840 	SamplingType							m_samplingType;
    841 	int										m_blendIteration;
    842 	bool									m_framebufferBlendEnabled;
    843 	bool									m_framebufferSRGBEnabled;
    844 };
    845 
    846 Renderer::Renderer				(Context& context)
    847 	: m_context					(context)
    848 	, m_vertexData				(context)
    849 	, m_textureSourceTotal		(2)
    850 	, m_blendConfigList			(getBlendingConfigList())
    851 	, m_hasShaderProgramInfo	(false)
    852 {
    853 	TextureSp textureLinear(new TestTexture2D(m_context, GL_RGBA8, GL_RGBA, GL_UNSIGNED_BYTE, getTestColorLinear()));
    854 	m_textureSourceList.push_back(textureLinear);
    855 
    856 	TextureSp textureSRGB(new TestTexture2D(m_context, GL_SRGB8_ALPHA8, GL_RGBA, GL_UNSIGNED_BYTE, getTestColorLinear()));
    857 	m_textureSourceList.push_back(textureSRGB);
    858 }
    859 
    860 Renderer::~Renderer (void)
    861 {
    862 	m_textureSourceList.clear();
    863 	this->deinit();
    864 }
    865 
    866 void Renderer::init (const TestRenderPassConfig& renderPassConfig, const int renderpass)
    867 {
    868 	m_renderPassConfig = renderPassConfig;
    869 	m_renderPass = renderpass;
    870 
    871 	this->createFBOwithColorAttachment(m_renderPassConfig.fboConfigList);
    872 
    873 	if (m_renderPassConfig.textureSourcesType != TEXTURESOURCESTYPE_NONE)
    874 	{
    875 		if (m_renderPassConfig.textureSourcesType == TEXTURESOURCESTYPE_RGBA || m_renderPassConfig.textureSourcesType == TEXTURESOURCESTYPE_SRGBA)
    876 			m_samplersRequired = 1;
    877 		else if (m_renderPassConfig.textureSourcesType ==TEXTURESOURCESTYPE_BOTH )
    878 			m_samplersRequired = 2;
    879 		else
    880 			DE_FATAL("Error: Texture source required not recognised");
    881 
    882 		m_shaderProgram = new TestShaderProgram(m_context, m_samplersRequired, m_renderPassConfig.testFunction);
    883 		m_hasFunction = m_renderPassConfig.testFunction.hasFunction;
    884 	}
    885 	else
    886 		m_shaderProgram = DE_NULL;
    887 }
    888 
    889 void Renderer::deinit (void)
    890 {
    891 	if (m_shaderProgram != DE_NULL)
    892 	{
    893 		delete m_shaderProgram;
    894 		m_shaderProgram = DE_NULL;
    895 	}
    896 
    897 	m_fboTextureList.clear();
    898 	m_framebufferList.clear();
    899 }
    900 
    901 void Renderer::setSamplingType (const SamplingType samplingType)
    902 {
    903 	m_samplingType = samplingType;
    904 }
    905 
    906 void Renderer::setBlendIteration (const int blendIteration)
    907 {
    908 	m_blendIteration = blendIteration;
    909 }
    910 
    911 void Renderer::setFramebufferBlend (const bool blend)
    912 {
    913 	m_framebufferBlendEnabled = blend;
    914 }
    915 
    916 void Renderer::setFramebufferSRGB (const bool sRGB)
    917 {
    918 	m_framebufferSRGBEnabled = sRGB;
    919 }
    920 
    921 std::vector<tcu::Vec4> Renderer::getResultsPreDraw (void) const
    922 {
    923 	return m_resultsListPreDraw;
    924 }
    925 
    926 std::vector<tcu::Vec4> Renderer::getResultsPostDraw (void) const
    927 {
    928 	return m_resultsListPostDraw;
    929 }
    930 
    931 int Renderer::getBlendConfigCount (void) const
    932 {
    933 	return (int)m_blendConfigList.size();
    934 }
    935 
    936 void Renderer::copyFrameBufferTexture (const int srcPx, const int srcPy, const int dstPx, const int dstPy)
    937 {
    938 	const glw::Functions&	gl						= m_context.getRenderContext().getFunctions();
    939 	int						fboSrcIdx				= -1;
    940 	int						fboDstIdx				= -1;
    941 	deUint32				fboSrcColAttachment		= GL_NONE;
    942 	deUint32				fboDstColAttachment		= GL_NONE;
    943 
    944 	for (int idx = 0; idx < (int)m_framebufferList.size(); idx++)
    945 		this->bindFramebuffer(idx);
    946 
    947 	// cache fbo attachments and idx locations
    948 	for (int idx = 0; idx < (int)m_framebufferList.size(); idx++)
    949 	{
    950 		if (m_framebufferList[idx]->getType() == FBOTYPE_SOURCE)
    951 		{
    952 			fboSrcIdx = m_framebufferList[idx]->getIdx();
    953 			fboSrcColAttachment = m_framebufferList[fboSrcIdx]->getColorAttachment();
    954 		}
    955 		if (m_framebufferList[idx]->getType() == FBOTYPE_DESTINATION)
    956 		{
    957 			fboDstIdx = m_framebufferList[idx]->getIdx();
    958 			fboDstColAttachment = m_framebufferList[fboDstIdx]->getColorAttachment();
    959 		}
    960 	}
    961 
    962 	for (int idx = 0; idx < (int)m_framebufferList.size(); idx++)
    963 		m_framebufferList[idx]->unbind();
    964 
    965 	// store texel data from both src and dst before performing the copy
    966 	m_resultsListPreDraw.resize(2);
    967 	m_framebufferList[fboSrcIdx]->bind();
    968 	this->readTexels(0, 0, fboSrcColAttachment, m_resultsListPreDraw[0]);
    969 	m_framebufferList[fboSrcIdx]->unbind();
    970 	m_framebufferList[fboDstIdx]->setTargetType(GL_READ_FRAMEBUFFER);
    971 	m_framebufferList[fboDstIdx]->bind();
    972 	this->readTexels(0, 0, fboDstColAttachment, m_resultsListPreDraw[1]);
    973 	m_framebufferList[fboDstIdx]->unbind();
    974 	m_framebufferList[fboDstIdx]->setTargetType(GL_DRAW_FRAMEBUFFER);
    975 
    976 	m_framebufferList[fboSrcIdx]->bind();
    977 	m_framebufferList[fboDstIdx]->bind();
    978 
    979 	this->enableFramebufferSRGB();
    980 	this->enableFramebufferBlend();
    981 
    982 	gl.blitFramebuffer(	srcPx, srcPy, TestTextureSizes::WIDTH, TestTextureSizes::HEIGHT,
    983 						dstPx, dstPy, TestTextureSizes::WIDTH, TestTextureSizes::HEIGHT,
    984 						GL_COLOR_BUFFER_BIT, GL_NEAREST);
    985 
    986 	m_resultsListPostDraw.resize(2);
    987 	this->readTexels(0, 0, fboSrcColAttachment, m_resultsListPostDraw[0]);
    988 	m_framebufferList[fboSrcIdx]->unbind();
    989 	m_framebufferList[fboDstIdx]->unbind();
    990 
    991 	m_framebufferList[fboDstIdx]->setTargetType(GL_READ_FRAMEBUFFER);
    992 	m_framebufferList[fboDstIdx]->bind();
    993 	this->readTexels(0, 0, fboDstColAttachment, m_resultsListPostDraw[1]);
    994 	m_framebufferList[fboDstIdx]->unbind();
    995 }
    996 
    997 void Renderer::draw (void)
    998 {
    999 	const glw::Functions&	gl = m_context.getRenderContext().getFunctions();
   1000 
   1001 	if (m_renderPassConfig.textureSourcesType == TEXTURESOURCESTYPE_NONE)
   1002 		DE_FATAL("Error: Attempted to draw with no texture sources");
   1003 
   1004 	// resize results storage with each render pass
   1005 	m_resultsListPreDraw.resize(m_renderPass + 1);
   1006 	m_resultsListPostDraw.resize(m_renderPass + 1);
   1007 
   1008 	m_shaderProgram->use();
   1009 	m_vertexData.bind();
   1010 
   1011 	for (int idx = 0; idx < (int)m_framebufferList.size(); idx++)
   1012 		this->bindFramebuffer(idx);
   1013 
   1014 	this->bindAllRequiredSourceTextures(m_renderPassConfig.textureSourcesType);
   1015 	this->bindActiveTexturesSamplers();
   1016 
   1017 	this->enableFramebufferSRGB();
   1018 	this->enableFramebufferBlend();
   1019 
   1020 	this->readTexels(0, 0, GL_COLOR_ATTACHMENT0, m_resultsListPreDraw[m_renderPass]);
   1021 	this->setShaderProgramSamplingType(m_samplingType);
   1022 	if (m_hasFunction)
   1023 	{
   1024 		this->setShaderBlendFunctionType();
   1025 		this->setShaderBlendSrcDstValues();
   1026 	}
   1027 
   1028 	gl.drawArrays(GL_TRIANGLES, 0, 6);
   1029 
   1030 	this->readTexels(0, 0, GL_COLOR_ATTACHMENT0, m_resultsListPostDraw[m_renderPass]);
   1031 	this->logState(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, m_samplingType);
   1032 
   1033 	this->unbindAllSourceTextures();
   1034 	for (int idx = 0; idx < (int)m_framebufferList.size(); idx++)
   1035 		this->unbindFramebuffer(idx);
   1036 	m_vertexData.unbind();
   1037 	m_shaderProgram->unuse();
   1038 }
   1039 
   1040 void Renderer::storeShaderProgramInfo (void)
   1041 {
   1042 	m_shaderProgramInfo = m_shaderProgram->getLogInfo();
   1043 	m_hasShaderProgramInfo = true;
   1044 }
   1045 
   1046 void Renderer::logShaderProgramInfo (void)
   1047 {
   1048 	tcu::TestLog& log = m_context.getTestContext().getLog();
   1049 
   1050 	if (m_hasShaderProgramInfo)
   1051 		log << m_shaderProgramInfo;
   1052 }
   1053 
   1054 void Renderer::createFBOwithColorAttachment (const std::vector<FBOConfig> fboConfigList)
   1055 {
   1056 	const int size = (int)fboConfigList.size();
   1057 	for (int idx = 0; idx < size; idx++)
   1058 	{
   1059 		TextureSp texture(new TestTexture2D(m_context, fboConfigList[idx].textureInternalFormat, GL_RGBA, GL_UNSIGNED_BYTE, fboConfigList[idx].textureColor));
   1060 		m_fboTextureList.push_back(texture);
   1061 
   1062 		bool isSRGB;
   1063 		if (fboConfigList[idx].textureInternalFormat == GL_SRGB8_ALPHA8)
   1064 			isSRGB = true;
   1065 		else
   1066 			isSRGB = false;
   1067 
   1068 		FboSp framebuffer(new TestFramebuffer(m_context, fboConfigList[idx].fboTargetType, fboConfigList[idx].fboColorAttachment, texture->getHandle(), isSRGB, fboConfigList[idx].fboType, idx));
   1069 		m_framebufferList.push_back(framebuffer);
   1070 	}
   1071 }
   1072 
   1073 void Renderer::setShaderProgramSamplingType (const int samplerIdx)
   1074 {
   1075 	const glw::Functions& gl = m_context.getRenderContext().getFunctions();
   1076 
   1077 	glw::GLuint location = gl.getUniformLocation(m_shaderProgram->getHandle(), "uFunctionType");
   1078 	DE_ASSERT(location != (glw::GLuint)-1);
   1079 	gl.uniform1i(location, samplerIdx);
   1080 }
   1081 
   1082 void Renderer::setShaderBlendFunctionType (void)
   1083 {
   1084 	const glw::Functions& gl = m_context.getRenderContext().getFunctions();
   1085 
   1086 	int function = -1;
   1087 	if (m_blendConfigList[m_blendIteration].equation == GL_FUNC_ADD)
   1088 		function = 0;
   1089 	else if (m_blendConfigList[m_blendIteration].equation == GL_FUNC_SUBTRACT)
   1090 		function = 1;
   1091 	else if (m_blendConfigList[m_blendIteration].equation == GL_FUNC_REVERSE_SUBTRACT)
   1092 		function = 2;
   1093 	else
   1094 		DE_FATAL("Error: Blend function not recognised");
   1095 
   1096 	glw::GLuint location = gl.getUniformLocation(m_shaderProgram->getHandle(), "uBlendFunctionType");
   1097 	DE_ASSERT(location != (glw::GLuint)-1);
   1098 	gl.uniform1i(location, function);
   1099 }
   1100 
   1101 void Renderer::setShaderBlendSrcDstValues (void)
   1102 {
   1103 	const glw::Functions& gl = m_context.getRenderContext().getFunctions();
   1104 
   1105 	float funcSrc;
   1106 	if (m_blendConfigList[m_blendIteration].funcSrc == GL_ONE)
   1107 		funcSrc = 1.0f;
   1108 	else
   1109 		funcSrc = 0.0f;
   1110 
   1111 	float funcDst;
   1112 		if (m_blendConfigList[m_blendIteration].funcDst == GL_ONE)
   1113 		funcDst = 1.0f;
   1114 	else
   1115 		funcDst = 0.0f;
   1116 
   1117 	glw::GLuint locationSrc = gl.getUniformLocation(m_shaderProgram->getHandle(), "uFactorSrc");
   1118 	gl.uniform1f(locationSrc, funcSrc);
   1119 	GLU_EXPECT_NO_ERROR(gl.getError(), "glUniform1f()");
   1120 
   1121 	glw::GLuint locationDst = gl.getUniformLocation(m_shaderProgram->getHandle(), "uFactorDst");
   1122 	gl.uniform1f(locationDst, funcDst);
   1123 	GLU_EXPECT_NO_ERROR(gl.getError(), "glUniform1f()");
   1124 }
   1125 
   1126 void Renderer::bindActiveTexturesSamplers (void)
   1127 {
   1128 	const glw::Functions& gl = m_context.getRenderContext().getFunctions();
   1129 
   1130 	for (int idx = 0; idx < m_samplersRequired; idx++)
   1131 	{
   1132 		std::ostringstream stream;
   1133 		stream << "uTexture" << idx;
   1134 		std::string uniformName(stream.str());
   1135 		glw::GLint location = gl.getUniformLocation(m_shaderProgram->getHandle(), uniformName.c_str());
   1136 		DE_ASSERT(location != -1);
   1137 		gl.uniform1i(location, m_textureSourceList[idx]->getTextureUnit());
   1138 		GLU_EXPECT_NO_ERROR(gl.getError(), "glGetUniformLocation()");
   1139 	}
   1140 }
   1141 
   1142 void Renderer::bindAllRequiredSourceTextures (const TextureSourcesType texturesRequired)
   1143 {
   1144 	if (texturesRequired == TEXTURESOURCESTYPE_RGBA)
   1145 		m_textureSourceList[0]->bind(0);
   1146 	else if (texturesRequired == TEXTURESOURCESTYPE_SRGBA)
   1147 		m_textureSourceList[1]->bind(0);
   1148 	else if (texturesRequired == TEXTURESOURCESTYPE_BOTH)
   1149 	{
   1150 		m_textureSourceList[0]->bind(0);
   1151 		m_textureSourceList[1]->bind(1);
   1152 	}
   1153 	else
   1154 		DE_FATAL("Error: Invalid sources requested in bind all");
   1155 }
   1156 
   1157 void Renderer::unbindAllSourceTextures (void)
   1158 {
   1159 	for (int idx = 0; idx < (int)m_textureSourceList.size(); idx++)
   1160 		m_textureSourceList[idx]->unbind();
   1161 }
   1162 
   1163 void Renderer::bindFramebuffer (const int framebufferIdx)
   1164 {
   1165 	m_framebufferList[framebufferIdx]->bind();
   1166 }
   1167 
   1168 void Renderer::unbindFramebuffer (const int framebufferIdx)
   1169 {
   1170 	m_framebufferList[framebufferIdx]->unbind();
   1171 }
   1172 
   1173 void Renderer::enableFramebufferSRGB (void)
   1174 {
   1175 	const glw::Functions& gl = m_context.getRenderContext().getFunctions();
   1176 
   1177 	if (m_framebufferSRGBEnabled)
   1178 		gl.enable(GL_FRAMEBUFFER_SRGB);
   1179 	else
   1180 		gl.disable(GL_FRAMEBUFFER_SRGB);
   1181 }
   1182 
   1183 void Renderer::enableFramebufferBlend (void)
   1184 {
   1185 	const glw::Functions&	gl	= m_context.getRenderContext().getFunctions();
   1186 	tcu::TestLog&			log	= m_context.getTestContext().getLog();
   1187 	std::ostringstream		message;
   1188 
   1189 	message << "Blend settings = ";
   1190 
   1191 	if (m_framebufferBlendEnabled)
   1192 	{
   1193 		gl.enable(GL_BLEND);
   1194 		gl.blendEquation(m_blendConfigList[m_blendIteration].equation);
   1195 		gl.blendFunc(m_blendConfigList[m_blendIteration].funcSrc, m_blendConfigList[m_blendIteration].funcDst);
   1196 
   1197 		std::string equation, src, dst;
   1198 		if (m_blendConfigList[m_blendIteration].equation == GL_FUNC_ADD)
   1199 			equation = "GL_FUNC_ADD";
   1200 		if (m_blendConfigList[m_blendIteration].equation == GL_FUNC_SUBTRACT)
   1201 			equation = "GL_FUNC_SUBTRACT";
   1202 		if (m_blendConfigList[m_blendIteration].equation == GL_FUNC_REVERSE_SUBTRACT)
   1203 			equation = "GL_FUNC_REVERSE_SUBTRACT";
   1204 		if (m_blendConfigList[m_blendIteration].funcSrc == GL_ONE)
   1205 			src = "GL_ONE";
   1206 		else
   1207 			src = "GL_ZERO";
   1208 		if (m_blendConfigList[m_blendIteration].funcDst == GL_ONE)
   1209 			dst = "GL_ONE";
   1210 		else
   1211 			dst = "GL_ZERO";
   1212 
   1213 		message << "Enabled: equation = " << equation << ", func src = " << src << ", func dst = " << dst;
   1214 	}
   1215 	else
   1216 	{
   1217 		gl.disable(GL_BLEND);
   1218 		message << "Disabled";
   1219 	}
   1220 
   1221 	log << tcu::TestLog::Message << message.str() << tcu::TestLog::EndMessage;
   1222 }
   1223 
   1224 bool Renderer::isFramebufferAttachmentSRGB (const deUint32 targetType, const deUint32 attachment) const
   1225 {
   1226 	const glw::Functions&	gl				= m_context.getRenderContext().getFunctions();
   1227 	glw::GLint				encodingType;
   1228 
   1229 	gl.getFramebufferAttachmentParameteriv(targetType, attachment, GL_FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING, &encodingType);
   1230 	GLU_EXPECT_NO_ERROR(gl.getError(), "glGetNamedFramebufferAttachmentParameteriv()");
   1231 
   1232 	switch (static_cast<glw::GLenum>(encodingType))
   1233 	{
   1234 		case GL_SRGB:
   1235 		{
   1236 			return true;
   1237 			break;
   1238 		}
   1239 		case GL_LINEAR:
   1240 		{
   1241 			return false;
   1242 			break;
   1243 		}
   1244 		default:
   1245 		{
   1246 			DE_FATAL("Error: Color attachment format not recognised");
   1247 			return false;
   1248 		}
   1249 	}
   1250 }
   1251 
   1252 void Renderer::readTexels (const int px, const int py, const deUint32 mode, tcu::Vec4& texelData)
   1253 {
   1254 	const glw::Functions&	gl			= m_context.getRenderContext().getFunctions();
   1255 	tcu::TextureLevel		textureRead;
   1256 
   1257 	// ensure result sampling coordinates are within range of the result color attachment
   1258 	DE_ASSERT((px >= 0) && (px < m_context.getRenderTarget().getWidth()));
   1259 	DE_ASSERT((py >= 0) && (py < m_context.getRenderTarget().getHeight()));
   1260 
   1261 	gl.readBuffer(mode);
   1262 	textureRead.setStorage(glu::mapGLTransferFormat(GL_RGBA, GL_UNSIGNED_BYTE), TestTextureSizes::WIDTH, TestTextureSizes::HEIGHT);
   1263 	glu::readPixels(m_context.getRenderContext(), px, py, textureRead.getAccess());
   1264 	GLU_EXPECT_NO_ERROR(gl.getError(), "glReadPixels()");
   1265 	texelData = textureRead.getAccess().getPixel(px, py);
   1266 }
   1267 
   1268 void Renderer::logState (const deUint32 targetType, const deUint32 attachment, const SamplingType samplingType) const
   1269 {
   1270 	tcu::TestLog&			log					= m_context.getTestContext().getLog();
   1271 	std::ostringstream		message;
   1272 
   1273 	bool fboAttachmentSRGB = this->isFramebufferAttachmentSRGB(targetType, attachment);
   1274 	message.str("");
   1275 	message << "getFramebufferAttachmentParameteriv() check = ";
   1276 	if (fboAttachmentSRGB)
   1277 		message << "GL_SRGB";
   1278 	else
   1279 		message << "GL_LINEAR";
   1280 	log << tcu::TestLog::Message << message.str() << tcu::TestLog::EndMessage;
   1281 
   1282 	message.str("");
   1283 	message << "Framebuffer color attachment value BEFORE draw call";
   1284 	logColor(m_context, message.str(), m_resultsListPreDraw[m_renderPass]);
   1285 
   1286 	message.str("");
   1287 	message << "Framebuffer color attachment value AFTER draw call";
   1288 	logColor(m_context, message.str(), m_resultsListPostDraw[m_renderPass]);
   1289 
   1290 	message.str("");
   1291 	message << "Sampling type = ";
   1292 	std::string type;
   1293 	if (samplingType == 0)
   1294 		type = "texture()";
   1295 	else if (samplingType == 1)
   1296 		type = "textureLOD()";
   1297 	else if (samplingType == 2)
   1298 		type = "textureGrad()";
   1299 	else if (samplingType == 3)
   1300 		type = "textureOffset()";
   1301 	else if (samplingType == 4)
   1302 		type = "textureProj()";
   1303 	else
   1304 		DE_FATAL("Error: Sampling type unregonised");
   1305 	message << type;
   1306 	log << tcu::TestLog::Message << message.str() << tcu::TestLog::EndMessage;
   1307 
   1308 	message.str("");
   1309 	if (m_framebufferSRGBEnabled)
   1310 		message << "Framebuffer SRGB = enabled";
   1311 	else
   1312 		message << "Framebuffer SRGB = disabled";
   1313 	log << tcu::TestLog::Message << message.str() << tcu::TestLog::EndMessage;
   1314 }
   1315 
   1316 class FboSRGBTestCase : public TestCase
   1317 {
   1318 public:
   1319 											FboSRGBTestCase				(Context& context, const char* const name, const char* const desc);
   1320 											~FboSRGBTestCase			(void);
   1321 
   1322 	void									init						(void);
   1323 	void									deinit						(void);
   1324 	IterateResult							iterate						(void);
   1325 
   1326 	void									setTestConfig				(std::vector<TestRenderPassConfig> renderPassConfigList);
   1327 
   1328 	virtual void							setupTest					(void) = 0;
   1329 	virtual bool							verifyResult				(void) = 0;
   1330 
   1331 protected:
   1332 	bool									m_hasTestConfig;
   1333 	std::vector<TestRenderPassConfig>		m_renderPassConfigList;
   1334 	bool									m_testcaseRequiresBlend;
   1335 	std::vector<tcu::Vec4>					m_resultsPreDraw;
   1336 	std::vector<tcu::Vec4>					m_resultsPostDraw;
   1337 
   1338 private:
   1339 											FboSRGBTestCase				(const FboSRGBTestCase&);
   1340 	FboSRGBTestCase&						operator=					(const FboSRGBTestCase&);
   1341 };
   1342 
   1343 FboSRGBTestCase::FboSRGBTestCase	(Context& context, const char* const name, const char* const desc)
   1344 	: TestCase						(context, name, desc)
   1345 	, m_hasTestConfig				(false)
   1346 {
   1347 }
   1348 
   1349 FboSRGBTestCase::~FboSRGBTestCase (void)
   1350 {
   1351 	FboSRGBTestCase::deinit();
   1352 }
   1353 
   1354 void FboSRGBTestCase::init (void)
   1355 {
   1356 	// extensions requirements for test
   1357 	if (!glu::contextSupports(m_context.getRenderContext().getType(), glu::ApiType::es(3, 2)))
   1358 		TCU_THROW(NotSupportedError, "Test requires a context version equal or higher than 3.2");
   1359 
   1360 	if (!m_context.getContextInfo().isExtensionSupported("GL_EXT_sRGB_write_control"))
   1361 		TCU_THROW(NotSupportedError, "Test requires extension GL_EXT_sRGB_write_control");
   1362 
   1363 	if (!m_context.getContextInfo().isExtensionSupported("GL_EXT_texture_sRGB_decode"))
   1364 		TCU_THROW(NotSupportedError, "Test requires GL_EXT_texture_sRGB_decode extension");
   1365 }
   1366 
   1367 void FboSRGBTestCase::deinit (void)
   1368 {
   1369 }
   1370 
   1371 FboSRGBTestCase::IterateResult FboSRGBTestCase::iterate (void)
   1372 {
   1373 	this->setupTest();
   1374 
   1375 	DE_ASSERT(m_hasTestConfig && "Error: Renderer was not supplied a test config");
   1376 
   1377 	Renderer renderer(m_context);
   1378 
   1379 	// loop through each sampling type
   1380 	for (int samplingIdx = 0; samplingIdx < SampligTypeCount::MAX; samplingIdx++)
   1381 	{
   1382 		renderer.setSamplingType(static_cast<SamplingType>(samplingIdx));
   1383 
   1384 		// loop through each blend configuration
   1385 		const int blendCount = renderer.getBlendConfigCount();
   1386 		for (int blendIdx = 0; blendIdx < blendCount; blendIdx++)
   1387 		{
   1388 			// loop through each render pass
   1389 			const int renderPassCount = (int)m_renderPassConfigList.size();
   1390 			for (int renderPassIdx = 0; renderPassIdx < renderPassCount; renderPassIdx++)
   1391 			{
   1392 				TestRenderPassConfig renderPassConfig = m_renderPassConfigList[renderPassIdx];
   1393 
   1394 				renderer.init(renderPassConfig, renderPassIdx);
   1395 
   1396 				if (blendIdx == 0 && renderPassConfig.rendererTask == RENDERERTASK_DRAW)
   1397 					renderer.storeShaderProgramInfo();
   1398 
   1399 				if (renderPassConfig.frameBufferBlend == FRAMEBUFFERBLEND_ENABLED)
   1400 				{
   1401 					renderer.setBlendIteration(blendIdx);
   1402 					renderer.setFramebufferBlend(true);
   1403 				}
   1404 				else
   1405 					renderer.setFramebufferBlend(false);
   1406 
   1407 				if (renderPassConfig.framebufferSRGB == FRAMEBUFFERSRGB_ENABLED)
   1408 					renderer.setFramebufferSRGB(true);
   1409 				else
   1410 					renderer.setFramebufferSRGB(false);
   1411 
   1412 				if (renderPassConfig.rendererTask == RENDERERTASK_DRAW)
   1413 					renderer.draw();
   1414 				else if (renderPassConfig.rendererTask == RENDERERTASK_COPY)
   1415 					renderer.copyFrameBufferTexture(0, 0, 0, 0);
   1416 				else
   1417 					DE_FATAL("Error: render task not recognised");
   1418 
   1419 				renderer.deinit();
   1420 
   1421 			} // render passes
   1422 
   1423 			m_resultsPreDraw = renderer.getResultsPreDraw();
   1424 			m_resultsPostDraw = renderer.getResultsPostDraw();
   1425 
   1426 			bool testPassed = this->verifyResult();
   1427 			if (testPassed)
   1428 				m_testCtx.setTestResult(QP_TEST_RESULT_PASS, "Pass");
   1429 			else
   1430 			{
   1431 				m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Result verification failed");
   1432 				renderer.logShaderProgramInfo();
   1433 				return STOP;
   1434 			}
   1435 
   1436 			if (!m_testcaseRequiresBlend)
   1437 				break;
   1438 		} // blend configs
   1439 
   1440 		renderer.logShaderProgramInfo();
   1441 	} // sampling types
   1442 
   1443 	return STOP;
   1444 }
   1445 
   1446 void FboSRGBTestCase::setTestConfig (std::vector<TestRenderPassConfig> renderPassConfigList)
   1447 {
   1448 	m_renderPassConfigList = renderPassConfigList;
   1449 	m_hasTestConfig = true;
   1450 
   1451 	for (int idx = 0; idx < (int)renderPassConfigList.size(); idx++)
   1452 	{
   1453 		if (renderPassConfigList[idx].frameBufferBlend == FRAMEBUFFERBLEND_ENABLED)
   1454 		{
   1455 			m_testcaseRequiresBlend = true;
   1456 			return;
   1457 		}
   1458 	}
   1459 	m_testcaseRequiresBlend = false;
   1460 }
   1461 
   1462 class FboSRGBQueryCase : public TestCase
   1463 {
   1464 public:
   1465 					FboSRGBQueryCase	(Context& context, const char* const name, const char* const description);
   1466 					~FboSRGBQueryCase	(void);
   1467 
   1468 	void			init				(void);
   1469 	void			deinit				(void);
   1470 	IterateResult	iterate				(void);
   1471 };
   1472 
   1473 FboSRGBQueryCase::FboSRGBQueryCase	(Context& context, const char* const name, const char* const description)
   1474 	: TestCase						(context, name, description)
   1475 {
   1476 }
   1477 
   1478 FboSRGBQueryCase::~FboSRGBQueryCase (void)
   1479 {
   1480 	FboSRGBQueryCase::deinit();
   1481 }
   1482 
   1483 void FboSRGBQueryCase::init (void)
   1484 {
   1485 	// extension requirements for test
   1486 	if (!m_context.getContextInfo().isExtensionSupported("GL_EXT_sRGB_write_control"))
   1487 		TCU_THROW(NotSupportedError, "Test requires extension GL_EXT_sRGB_write_control");
   1488 }
   1489 
   1490 void FboSRGBQueryCase::deinit (void)
   1491 {
   1492 }
   1493 
   1494 FboSRGBQueryCase::IterateResult FboSRGBQueryCase::iterate (void)
   1495 {
   1496 	// TEST INFO:
   1497 	// API tests which check when querying FRAMEBUFFER_SRGB_EXT capability returns the correct information when using glEnabled() or glDisabled()
   1498 
   1499 	const glw::Functions&	gl		= m_context.getRenderContext().getFunctions();
   1500 	tcu::TestLog&			log		= m_context.getTestContext().getLog();
   1501 	const char*	const		msgPart	= ", after disabling = ";
   1502 
   1503 	for (int idx = 0; idx < static_cast<int>(QUERYTYPE_LAST); idx++)
   1504 	{
   1505 		std::ostringstream	message;
   1506 		bool				pass		= false;
   1507 
   1508 		message << std::string("Results: After Enabling = ");
   1509 
   1510 		gl.enable(GL_FRAMEBUFFER_SRGB);
   1511 
   1512 		switch (static_cast<QueryType>(idx))
   1513 		{
   1514 			case QUERYTYPE_ISENABLED:
   1515 			{
   1516 				glw::GLboolean enabled[2];
   1517 				enabled[0] = gl.isEnabled(GL_FRAMEBUFFER_SRGB);
   1518 				gl.disable(GL_FRAMEBUFFER_SRGB);
   1519 				enabled[1] = gl.isEnabled(GL_FRAMEBUFFER_SRGB);
   1520 
   1521 				message << static_cast<float>(enabled[0]) << msgPart << static_cast<float>(enabled[1]);
   1522 				pass = (enabled[0] && !(enabled[1])) ? true : false;
   1523 				break;
   1524 			}
   1525 			case QUERYTYPE_BOOLEAN:
   1526 			{
   1527 				glw::GLboolean enabled[2];
   1528 				gl.getBooleanv(GL_FRAMEBUFFER_SRGB,&enabled[0]);
   1529 				gl.disable(GL_FRAMEBUFFER_SRGB);
   1530 				gl.getBooleanv(GL_FRAMEBUFFER_SRGB,&enabled[1]);
   1531 
   1532 				message << static_cast<float>(enabled[0]) << msgPart << static_cast<float>(enabled[1]);
   1533 				pass = (enabled[0] && !(enabled[1])) ? true : false;
   1534 				break;
   1535 			}
   1536 			case QUERYTYPE_FLOAT:
   1537 			{
   1538 				glw::GLfloat enabled[2];
   1539 				gl.getFloatv(GL_FRAMEBUFFER_SRGB, &enabled[0]);
   1540 				gl.disable(GL_FRAMEBUFFER_SRGB);
   1541 				gl.getFloatv(GL_FRAMEBUFFER_SRGB, &enabled[1]);
   1542 
   1543 				message << static_cast<float>(enabled[0]) << msgPart << static_cast<float>(enabled[1]);
   1544 				pass = ((int)enabled[0] && !((int)enabled[1])) ? true : false;
   1545 				break;
   1546 			}
   1547 			case QUERYTYPE_INT:
   1548 			{
   1549 				glw::GLint enabled[2];
   1550 				gl.getIntegerv(GL_FRAMEBUFFER_SRGB, &enabled[0]);
   1551 				gl.disable(GL_FRAMEBUFFER_SRGB);
   1552 				gl.getIntegerv(GL_FRAMEBUFFER_SRGB, &enabled[1]);
   1553 
   1554 				message << static_cast<float>(enabled[0]) << msgPart << static_cast<float>(enabled[1]);
   1555 				pass = (enabled[0] && !(enabled[1])) ? true : false;
   1556 				break;
   1557 			}
   1558 			case QUERYTYPE_INT64:
   1559 			{
   1560 				glw::GLint64 enabled[2];
   1561 				gl.getInteger64v(GL_FRAMEBUFFER_SRGB, &enabled[0]);
   1562 				gl.disable(GL_FRAMEBUFFER_SRGB);
   1563 				gl.getInteger64v(GL_FRAMEBUFFER_SRGB, &enabled[1]);
   1564 
   1565 				message << static_cast<float>(enabled[0]) << msgPart << static_cast<float>(enabled[1]);
   1566 				pass = (enabled[0] && !(enabled[1])) ? true : false;
   1567 				break;
   1568 			}
   1569 			default:
   1570 				DE_FATAL("Error: Datatype not recognised");
   1571 		}
   1572 
   1573 		log << tcu::TestLog::Message << message.str() << tcu::TestLog::EndMessage;
   1574 
   1575 		if (pass)
   1576 			m_testCtx.setTestResult(QP_TEST_RESULT_PASS, "Pass");
   1577 		else
   1578 		{
   1579 			m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Result verification failed");
   1580 			return STOP;
   1581 		}
   1582 	}
   1583 	return STOP;
   1584 }
   1585 
   1586 class FboSRGBColAttachCase : public FboSRGBTestCase
   1587 {
   1588 public:
   1589 			FboSRGBColAttachCase	(Context& context, const char* const name, const char* const description)
   1590 				: FboSRGBTestCase	(context, name, description) {}
   1591 			~FboSRGBColAttachCase	(void) {}
   1592 
   1593 	void	setupTest				(void);
   1594 	bool	verifyResult			(void);
   1595 };
   1596 
   1597 void FboSRGBColAttachCase::setupTest (void)
   1598 {
   1599 	// TEST INFO:
   1600 	// Check if FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING  set to SRGB and FRAMEBUFFER_SRGB_EXT enabled, destination colors are converted from SRGB to linear
   1601 	// before and after blending, finally the result is converted back to SRGB for storage
   1602 
   1603 	// NOTE:
   1604 	// if fbo pre-draw color set to linaer, color values get linearlized "twice"
   1605 	// (0.2f, 0.3f, 0.4f, 1.0f) when sampled i.e. converted in shader = (0.0331048f, 0.073239f, 0.132868f)
   1606 	// resulting in the follolwing blending equation (0.2f, 0.3f, 0.4f 1.0f) + (0.0331048, 0.073239, 0.132868) = (0.521569f, 0.647059f, 0.756863f, 1.0f)
   1607 
   1608 	FBOConfig fboConfig0 = FBOConfig(GL_SRGB8_ALPHA8, getTestColorLinear(), GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, FBOTYPE_SOURCE);
   1609 	FBOConfig fboConfig1 = FBOConfig(GL_RGBA8, getTestColorLinear(), GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, FBOTYPE_SOURCE);
   1610 
   1611 	const TestRenderPassConfig renderPassConfigs[] =
   1612 	{
   1613 		TestRenderPassConfig(TEXTURESOURCESTYPE_RGBA, fboConfig0, FRAMEBUFFERSRGB_ENABLED, FRAMEBUFFERBLEND_ENABLED, RENDERERTASK_DRAW),
   1614 		TestRenderPassConfig(TEXTURESOURCESTYPE_BOTH, fboConfig1, FRAMEBUFFERSRGB_DISABLED, FRAMEBUFFERBLEND_DISABLED, getFunctionBlendLinearToSRGBCheck(), RENDERERTASK_DRAW)
   1615 	};
   1616 	std::vector<TestRenderPassConfig> renderPassConfigList(renderPassConfigs, renderPassConfigs + DE_LENGTH_OF_ARRAY(renderPassConfigs));
   1617 
   1618 	this->setTestConfig(renderPassConfigList);
   1619 }
   1620 
   1621 bool FboSRGBColAttachCase::verifyResult (void)
   1622 {
   1623 	if (tcu::boolAll(tcu::lessThan(tcu::abs(m_resultsPostDraw[0] - m_resultsPostDraw[1]), getEpsilonError())) || tcu::boolAll(tcu::equal(m_resultsPostDraw[0], m_resultsPostDraw[1])))
   1624 		return true;
   1625 	else
   1626 		return false;
   1627 }
   1628 
   1629 class FboSRGBToggleBlendCase : public FboSRGBTestCase
   1630 {
   1631 public:
   1632 			FboSRGBToggleBlendCase		(Context& context, const char* const name, const char* const description)
   1633 				: FboSRGBTestCase		(context, name, description) {}
   1634 			~FboSRGBToggleBlendCase		(void) {}
   1635 
   1636 	void	setupTest					(void);
   1637 	bool	verifyResult				(void);
   1638 };
   1639 
   1640 void FboSRGBToggleBlendCase::setupTest (void)
   1641 {
   1642 	//	TEST INFO:
   1643 	//	Test to check if changing FRAMEBUFFER_SRGB_EXT from enabled to disabled. Enabled should produce SRGB color whilst disabled
   1644 	//	should produce linear color. Test conducted with blending disabled.
   1645 
   1646 	FBOConfig fboConfig0 = FBOConfig(GL_SRGB8_ALPHA8, getTestColorLinear(), GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, FBOTYPE_DESTINATION);
   1647 
   1648 	const TestRenderPassConfig renderPassConfigs[] =
   1649 	{
   1650 		TestRenderPassConfig(TEXTURESOURCESTYPE_RGBA, fboConfig0, FRAMEBUFFERSRGB_ENABLED,  FRAMEBUFFERBLEND_DISABLED, TestFunction(false), RENDERERTASK_DRAW),
   1651 		TestRenderPassConfig(TEXTURESOURCESTYPE_RGBA, fboConfig0, FRAMEBUFFERSRGB_DISABLED, FRAMEBUFFERBLEND_DISABLED, TestFunction(false), RENDERERTASK_DRAW)
   1652 	};
   1653 	std::vector<TestRenderPassConfig> renderPassConfigList(renderPassConfigs, renderPassConfigs + DE_LENGTH_OF_ARRAY(renderPassConfigs));
   1654 
   1655 	this->setTestConfig(renderPassConfigList);
   1656 }
   1657 
   1658 bool FboSRGBToggleBlendCase::verifyResult (void)
   1659 {
   1660 	if (tcu::boolAny(tcu::greaterThan(tcu::abs(m_resultsPostDraw[0] - m_resultsPostDraw[1]), getEpsilonError())))
   1661 		return true;
   1662 	else
   1663 		return false;
   1664 }
   1665 
   1666 class FboSRGBRenderTargetIgnoreCase : public FboSRGBTestCase
   1667 {
   1668 public:
   1669 			FboSRGBRenderTargetIgnoreCase		(Context& context, const char* const name, const char* const description)
   1670 				: FboSRGBTestCase				(context, name, description) {}
   1671 			~FboSRGBRenderTargetIgnoreCase		(void) {}
   1672 
   1673 	void	setupTest							(void);
   1674 	bool	verifyResult						(void);
   1675 };
   1676 
   1677 void FboSRGBRenderTargetIgnoreCase::setupTest (void)
   1678 {
   1679 	// TEST INFO:
   1680 	// Check if render targets that are non-RGB ignore the state of GL_FRAMEBUFFER_SRGB_EXT. Rendering to an fbo with non-sRGB color
   1681 	// attachment should ignore color space conversion, producing linear color.
   1682 
   1683 	FBOConfig fboConfig0 = FBOConfig(GL_RGBA8, getTestColorBlank(), GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, FBOTYPE_DESTINATION);
   1684 
   1685 	const TestRenderPassConfig renderPassConfigs[] =
   1686 	{
   1687 		TestRenderPassConfig(TEXTURESOURCESTYPE_RGBA, fboConfig0, FRAMEBUFFERSRGB_ENABLED,  FRAMEBUFFERBLEND_DISABLED, TestFunction(false), RENDERERTASK_DRAW)
   1688 
   1689 	};
   1690 	std::vector<TestRenderPassConfig> renderPassConfigList(renderPassConfigs, renderPassConfigs + DE_LENGTH_OF_ARRAY(renderPassConfigs));
   1691 
   1692 	this->setTestConfig(renderPassConfigList);
   1693 }
   1694 
   1695 bool FboSRGBRenderTargetIgnoreCase::verifyResult (void)
   1696 {
   1697 	if (tcu::boolAll(tcu::lessThan(tcu::abs(m_resultsPostDraw[0] - getTestColorLinear()), getEpsilonError())) || tcu::boolAll(tcu::equal(m_resultsPostDraw[0], getTestColorLinear())))
   1698 		return true;
   1699 	else
   1700 		return false;
   1701 }
   1702 
   1703 class FboSRGBCopyToLinearCase : public FboSRGBTestCase
   1704 {
   1705 public:
   1706 			FboSRGBCopyToLinearCase		(Context& context, const char* const name, const char* const description)
   1707 				: FboSRGBTestCase		(context, name, description) {}
   1708 			~FboSRGBCopyToLinearCase	(void) {}
   1709 
   1710 	void	setupTest					(void);
   1711 	bool	verifyResult				(void);
   1712 };
   1713 
   1714 void FboSRGBCopyToLinearCase::setupTest (void)
   1715 {
   1716 	// TEST INFO:
   1717 	// Check if copying from an fbo with an sRGB color attachment to an fbo with a linear color attachment with FRAMEBUFFER_EXT enabled results in
   1718 	// an sRGB to linear conversion
   1719 
   1720 	FBOConfig fboConfigs[] =
   1721 	{
   1722 		FBOConfig(GL_SRGB8_ALPHA8, getTestColorSRGB(), GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, FBOTYPE_SOURCE),
   1723 		FBOConfig(GL_RGBA8, getTestColorBlank(), GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, FBOTYPE_DESTINATION)
   1724 	};
   1725 	std::vector<FBOConfig> fboConfigList(fboConfigs, fboConfigs + DE_LENGTH_OF_ARRAY(fboConfigs));
   1726 
   1727 	const TestRenderPassConfig renderPassConfigs[] =
   1728 	{
   1729 		TestRenderPassConfig(TEXTURESOURCESTYPE_NONE, fboConfigList, FRAMEBUFFERSRGB_ENABLED,  FRAMEBUFFERBLEND_DISABLED, TestFunction(false), RENDERERTASK_COPY)
   1730 	};
   1731 	std::vector<TestRenderPassConfig> renderPassConfigList(renderPassConfigs, renderPassConfigs + DE_LENGTH_OF_ARRAY(renderPassConfigs));
   1732 
   1733 	this->setTestConfig(renderPassConfigList);
   1734 }
   1735 
   1736 bool FboSRGBCopyToLinearCase::verifyResult (void)
   1737 {
   1738 	logColor(m_context, "pre-copy source fbo color values", m_resultsPreDraw[0]);
   1739 	logColor(m_context, "pre-copy destination fbo color values", m_resultsPreDraw[1]);
   1740 	logColor(m_context, "post-copy source fbo color values", m_resultsPostDraw[0]);
   1741 	logColor(m_context, "post-copy destination fbo color values", m_resultsPostDraw[1]);
   1742 
   1743 	if (tcu::boolAll(tcu::lessThan(tcu::abs(m_resultsPostDraw[1] - getTestColorLinear()), getEpsilonError())) || tcu::boolAll(tcu::equal(m_resultsPostDraw[1], getTestColorLinear())))
   1744 		return true;
   1745 	else
   1746 		return false;
   1747 }
   1748 
   1749 class FboSRGBUnsupportedEnumCase : public TestCase
   1750 {
   1751 public:
   1752 					FboSRGBUnsupportedEnumCase	(Context& context, const char* const name, const char* const description);
   1753 					~FboSRGBUnsupportedEnumCase	(void);
   1754 
   1755 	void			init						(void);
   1756 	void			deinit						(void);
   1757 	bool			isInvalidEnum				(std::string functionName);
   1758 	IterateResult	iterate						(void);
   1759 };
   1760 
   1761 FboSRGBUnsupportedEnumCase::FboSRGBUnsupportedEnumCase	(Context& context, const char* const name, const char* const description)
   1762 	: TestCase						(context, name, description)
   1763 {
   1764 }
   1765 
   1766 FboSRGBUnsupportedEnumCase::~FboSRGBUnsupportedEnumCase (void)
   1767 {
   1768 	FboSRGBUnsupportedEnumCase::deinit();
   1769 }
   1770 
   1771 void FboSRGBUnsupportedEnumCase::init (void)
   1772 {
   1773 	// extension requirements for test
   1774 	if (m_context.getContextInfo().isExtensionSupported("GL_EXT_sRGB_write_control"))
   1775 		TCU_THROW(NotSupportedError, "Test requires extension GL_EXT_sRGB_write_control to be unsupported");
   1776 }
   1777 
   1778 void FboSRGBUnsupportedEnumCase::deinit (void)
   1779 {
   1780 }
   1781 
   1782 bool FboSRGBUnsupportedEnumCase::isInvalidEnum (std::string functionName)
   1783 {
   1784 	const glw::Functions&	gl			= m_context.getRenderContext().getFunctions();
   1785 	tcu::TestLog&			log			= m_context.getTestContext().getLog();
   1786 	bool					isOk		= true;
   1787 	glw::GLenum				error		= GL_NO_ERROR;
   1788 
   1789 	log << tcu::TestLog::Message << "Checking call to " << functionName << tcu::TestLog::EndMessage;
   1790 
   1791 	error = gl.getError();
   1792 
   1793 	if (error != GL_INVALID_ENUM)
   1794 	{
   1795 		log << tcu::TestLog::Message << " returned wrong value [" << glu::getErrorStr(error) << ", expected " << glu::getErrorStr(GL_INVALID_ENUM) << "]" << tcu::TestLog::EndMessage;
   1796 		isOk = false;
   1797 	}
   1798 
   1799 	return isOk;
   1800 }
   1801 
   1802 FboSRGBUnsupportedEnumCase::IterateResult FboSRGBUnsupportedEnumCase::iterate (void)
   1803 {
   1804 	// TEST INFO:
   1805 	// API tests that check calls using enum GL_FRAMEBUFFER_SRGB return GL_INVALID_ENUM  when GL_EXT_sRGB_write_control is not supported
   1806 
   1807 	const glw::Functions&	gl			= m_context.getRenderContext().getFunctions();
   1808 	bool					allPass		= true;
   1809 	glw::GLboolean			bEnabled	= GL_FALSE;
   1810 	glw::GLfloat			fEnabled	= 0;
   1811 	glw::GLint				iEnabled	= 0;
   1812 	glw::GLint64			lEnabled	= 0;
   1813 
   1814 	m_context.getTestContext().getLog() << tcu::TestLog::Message
   1815 										<< "Check calls using enum GL_FRAMEBUFFER_SRGB return GL_INVALID_ENUM  when GL_EXT_sRGB_write_control is not supported\n\n"
   1816 										<< tcu::TestLog::EndMessage;
   1817 
   1818 	gl.enable(GL_FRAMEBUFFER_SRGB);
   1819 	allPass &= isInvalidEnum("glEnable()");
   1820 
   1821 	gl.disable(GL_FRAMEBUFFER_SRGB);
   1822 	allPass &= isInvalidEnum("glDisable()");
   1823 
   1824 	gl.isEnabled(GL_FRAMEBUFFER_SRGB);
   1825 	allPass &= isInvalidEnum("glIsEnabled()");
   1826 
   1827 	gl.getBooleanv(GL_FRAMEBUFFER_SRGB, &bEnabled);
   1828 	allPass &= isInvalidEnum("glGetBooleanv()");
   1829 
   1830 	gl.getFloatv(GL_FRAMEBUFFER_SRGB, &fEnabled);
   1831 	allPass &= isInvalidEnum("glGetFloatv()");
   1832 
   1833 	gl.getIntegerv(GL_FRAMEBUFFER_SRGB, &iEnabled);
   1834 	allPass &= isInvalidEnum("glGetIntegerv()");
   1835 
   1836 	gl.getInteger64v(GL_FRAMEBUFFER_SRGB, &lEnabled);
   1837 	allPass &= isInvalidEnum("glGetInteger64v()");
   1838 
   1839 	if (allPass)
   1840 		m_testCtx.setTestResult(QP_TEST_RESULT_PASS, "Pass");
   1841 	else
   1842 		m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Fail");
   1843 
   1844 	return STOP;
   1845 }
   1846 
   1847 } // anonymous
   1848 
   1849 FboSRGBWriteControlTests::FboSRGBWriteControlTests	(Context& context)
   1850 	: TestCaseGroup			(context, "srgb_write_control", "Colorbuffer tests")
   1851 {
   1852 }
   1853 
   1854 FboSRGBWriteControlTests::~FboSRGBWriteControlTests (void)
   1855 {
   1856 }
   1857 
   1858 void FboSRGBWriteControlTests::init (void)
   1859 {
   1860 	this->addChild(new FboSRGBQueryCase					(m_context, "framebuffer_srgb_enabled",							"srgb enable framebuffer"));
   1861 	this->addChild(new FboSRGBColAttachCase				(m_context, "framebuffer_srgb_enabled_col_attach",				"srgb enable color attachment and framebuffer"));
   1862 	this->addChild(new FboSRGBToggleBlendCase			(m_context, "framebuffer_srgb_enabled_blend",					"toggle framebuffer srgb settings with blend disabled"));
   1863 	this->addChild(new FboSRGBRenderTargetIgnoreCase	(m_context, "framebuffer_srgb_enabled_render_target_ignore",	"enable framebuffer srgb, non-srgb render target should ignore"));
   1864 	this->addChild(new FboSRGBCopyToLinearCase			(m_context, "framebuffer_srgb_enabled_copy_to_linear",			"no conversion when blittering between framebuffer srgb and linear"));
   1865 
   1866 	// negative
   1867 	this->addChild(new FboSRGBUnsupportedEnumCase		(m_context, "framebuffer_srgb_unsupported_enum",				"check error codes for query functions when extension is not supported"));
   1868 }
   1869 
   1870 }
   1871 } // gles31
   1872 } // deqp
   1873