/*-------------------------------------------------------------------------
 * drawElements Quality Program OpenGL ES 2.0 Module
 * -------------------------------------------------
 *
 * Copyright 2014 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 *//*!
 * \file
 * \brief Rbo state query tests.
 *//*--------------------------------------------------------------------*/

#include "es2fRboStateQueryTests.hpp"
#include "glsStateQueryUtil.hpp"
#include "es2fApiCase.hpp"
#include "gluRenderContext.hpp"
#include "glwEnums.hpp"
#include "glwFunctions.hpp"
#include "deRandom.hpp"
#include "deMath.h"

using namespace glw; // GLint and other GL types
using deqp::gls::StateQueryUtil::StateQueryMemoryWriteGuard;


namespace deqp
{
namespace gles2
{
namespace Functional
{
namespace
{

void checkRenderbufferComponentSize (tcu::TestContext& testCtx, glu::CallLogWrapper& gl, int r, int g, int b, int a, int d, int s)
{
	using tcu::TestLog;

	const int referenceSizes[] = {r, g, b, a, d, s};
	const GLenum paramNames[] =
	{
		GL_RENDERBUFFER_RED_SIZE,
		GL_RENDERBUFFER_GREEN_SIZE,
		GL_RENDERBUFFER_BLUE_SIZE,
		GL_RENDERBUFFER_ALPHA_SIZE,
		GL_RENDERBUFFER_DEPTH_SIZE,
		GL_RENDERBUFFER_STENCIL_SIZE
	};

	DE_STATIC_ASSERT(DE_LENGTH_OF_ARRAY(referenceSizes) == DE_LENGTH_OF_ARRAY(paramNames));

	for (int ndx = 0; ndx < DE_LENGTH_OF_ARRAY(referenceSizes); ++ndx)
	{
		if (referenceSizes[ndx] == -1)
			continue;

		StateQueryMemoryWriteGuard<GLint> state;
		gl.glGetRenderbufferParameteriv(GL_RENDERBUFFER, paramNames[ndx], &state);

		if (!state.verifyValidity(testCtx))
			return;

		if (state < referenceSizes[ndx])
		{
			testCtx.getLog() << TestLog::Message << "// ERROR: Expected greater or equal to " << referenceSizes[ndx] << "; got " << state << TestLog::EndMessage;
			if (testCtx.getTestResult() == QP_TEST_RESULT_PASS)
				testCtx.setTestResult(QP_TEST_RESULT_FAIL, "got invalid value");
		}
	}
}

void checkIntEquals (tcu::TestContext& testCtx, GLint got, GLint expected)
{
	using tcu::TestLog;

	if (got != expected)
	{
		testCtx.getLog() << TestLog::Message << "// ERROR: Expected " << expected << "; got " << got << TestLog::EndMessage;
		if (testCtx.getTestResult() == QP_TEST_RESULT_PASS)
			testCtx.setTestResult(QP_TEST_RESULT_FAIL, "got invalid value");
	}
}

void checkRenderbufferParam (tcu::TestContext& testCtx, glu::CallLogWrapper& gl, GLenum pname, GLenum reference)
{
	StateQueryMemoryWriteGuard<GLint> state;
	gl.glGetRenderbufferParameteriv(GL_RENDERBUFFER, pname, &state);

	if (state.verifyValidity(testCtx))
		checkIntEquals(testCtx, state, reference);
}

class RboSizeCase : public ApiCase
{
public:
	RboSizeCase (Context& context, const char* name, const char* description)
		: ApiCase(context, name, description)
	{
	}

	void test (void)
	{
		de::Random rnd(0xabcdef);

		GLuint renderbufferID = 0;
		glGenRenderbuffers(1, &renderbufferID);
		glBindRenderbuffer(GL_RENDERBUFFER, renderbufferID);
		expectError(GL_NO_ERROR);

		checkRenderbufferParam(m_testCtx, *this, GL_RENDERBUFFER_WIDTH,		0);
		checkRenderbufferParam(m_testCtx, *this, GL_RENDERBUFFER_HEIGHT,	0);
		expectError(GL_NO_ERROR);

		int maxRenderbufferSize = 1;
		glGetIntegerv(GL_MAX_RENDERBUFFER_SIZE, &maxRenderbufferSize);
		expectError(GL_NO_ERROR);

		const int numIterations = 30;
		for (int i = 0; i < numIterations; ++i)
		{
			const GLint w = rnd.getInt(0, maxRenderbufferSize);
			const GLint h = rnd.getInt(0, maxRenderbufferSize);

			glRenderbufferStorage(GL_RENDERBUFFER, GL_RGBA4, w, h);
			expectError(GL_NO_ERROR);

			checkRenderbufferParam(m_testCtx, *this, GL_RENDERBUFFER_WIDTH,		w);
			checkRenderbufferParam(m_testCtx, *this, GL_RENDERBUFFER_HEIGHT,	h);
		}

		glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, 0);
		glDeleteRenderbuffers(1, &renderbufferID);
	}
};

class RboInternalFormatCase : public ApiCase
{
public:
	RboInternalFormatCase (Context& context, const char* name, const char* description)
		: ApiCase(context, name, description)
	{
	}

	void test (void)
	{
		GLuint renderbufferID = 0;
		glGenRenderbuffers(1, &renderbufferID);
		glBindRenderbuffer(GL_RENDERBUFFER, renderbufferID);
		expectError(GL_NO_ERROR);

		checkRenderbufferParam(m_testCtx, *this, GL_RENDERBUFFER_INTERNAL_FORMAT, GL_RGBA4);
		expectError(GL_NO_ERROR);

		const GLenum requiredColorformats[] =
		{
			GL_RGBA4, GL_RGB5_A1, GL_RGB565
		};

		for (int ndx = 0; ndx < DE_LENGTH_OF_ARRAY(requiredColorformats); ++ndx)
		{
			glRenderbufferStorage(GL_RENDERBUFFER, requiredColorformats[ndx], 1, 1);
			expectError(GL_NO_ERROR);

			checkRenderbufferParam(m_testCtx, *this, GL_RENDERBUFFER_INTERNAL_FORMAT, requiredColorformats[ndx]);
		}

		glDeleteRenderbuffers(1, &renderbufferID);
	}
};

class RboComponentSizeColorCase : public ApiCase
{
public:
	RboComponentSizeColorCase (Context& context, const char* name, const char* description)
		: ApiCase(context, name, description)
	{
	}

	void test (void)
	{
		GLuint renderbufferID = 0;
		glGenRenderbuffers(1, &renderbufferID);
		glBindRenderbuffer(GL_RENDERBUFFER, renderbufferID);
		expectError(GL_NO_ERROR);

		checkRenderbufferComponentSize(m_testCtx, *this, 0, 0, 0, 0, 0, 0);
		expectError(GL_NO_ERROR);

		const struct ColorFormat
		{
			GLenum	internalFormat;
			int		bitsR, bitsG, bitsB, bitsA;
		} requiredColorFormats[] =
		{
			{ GL_RGBA4,			4,	4,	4,	4	},
			{ GL_RGB5_A1,		5,	5,	5,	1	},
			{ GL_RGB565,		5,	6,	5,	0	},
		};

		for (int ndx = 0; ndx < DE_LENGTH_OF_ARRAY(requiredColorFormats); ++ndx)
		{
			glRenderbufferStorage(GL_RENDERBUFFER, requiredColorFormats[ndx].internalFormat, 1, 1);
			expectError(GL_NO_ERROR);

			checkRenderbufferComponentSize(m_testCtx, *this, requiredColorFormats[ndx].bitsR, requiredColorFormats[ndx].bitsG, requiredColorFormats[ndx].bitsB, requiredColorFormats[ndx].bitsA, -1, -1);
		}

		glDeleteRenderbuffers(1, &renderbufferID);
	}
};

class RboComponentSizeDepthCase : public ApiCase
{
public:
	RboComponentSizeDepthCase (Context& context, const char* name, const char* description)
		: ApiCase(context, name, description)
	{
	}

	void test (void)
	{
		using tcu::TestLog;

		GLuint renderbufferID = 0;
		glGenRenderbuffers(1, &renderbufferID);
		glBindRenderbuffer(GL_RENDERBUFFER, renderbufferID);
		expectError(GL_NO_ERROR);

		const struct DepthFormat
		{
			GLenum	internalFormat;
			int		dbits;
			int		sbits;
		} requiredDepthFormats[] =
		{
			{ GL_DEPTH_COMPONENT16,		16, 0 },
		};

		for (int ndx = 0; ndx < DE_LENGTH_OF_ARRAY(requiredDepthFormats); ++ndx)
		{
			glRenderbufferStorage(GL_RENDERBUFFER, requiredDepthFormats[ndx].internalFormat, 1, 1);
			expectError(GL_NO_ERROR);

			checkRenderbufferComponentSize(m_testCtx, *this, -1, -1, -1, -1, requiredDepthFormats[ndx].dbits, requiredDepthFormats[ndx].sbits);
		}

		// STENCIL_INDEX8 is required, in that case sBits >= 8
		{
			glRenderbufferStorage(GL_RENDERBUFFER, GL_STENCIL_INDEX8, 1, 1);
			expectError(GL_NO_ERROR);

			StateQueryMemoryWriteGuard<GLint> state;
			glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_STENCIL_SIZE, &state);

			if (state.verifyValidity(m_testCtx) && state < 8)
			{
				m_testCtx.getLog() << TestLog::Message << "// ERROR: Expected greater or equal to 8; got " << state << TestLog::EndMessage;
				if (m_testCtx.getTestResult() == QP_TEST_RESULT_PASS)
					m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "got invalid value");
			}
		}

		glDeleteRenderbuffers(1, &renderbufferID);
	}
};

} // anonymous


RboStateQueryTests::RboStateQueryTests (Context& context)
	: TestCaseGroup(context, "rbo", "Rbo State Query tests")
{
}

void RboStateQueryTests::init (void)
{
	addChild(new RboSizeCase				(m_context, "renderbuffer_size",					"RENDERBUFFER_WIDTH and RENDERBUFFER_HEIGHT"));
	addChild(new RboInternalFormatCase		(m_context, "renderbuffer_internal_format",			"RENDERBUFFER_INTERNAL_FORMAT"));
	addChild(new RboComponentSizeColorCase	(m_context, "renderbuffer_component_size_color",	"RENDERBUFFER_x_SIZE"));
	addChild(new RboComponentSizeDepthCase	(m_context, "renderbuffer_component_size_depth",	"RENDERBUFFER_x_SIZE"));
}

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