#ifndef _GL4CBUFFERSTORAGETESTS_HPP
#define _GL4CBUFFERSTORAGETESTS_HPP
/*-------------------------------------------------------------------------
 * OpenGL Conformance Test Suite
 * -----------------------------
 *
 * Copyright (c) 2015-2016 The Khronos Group Inc.
 *
 * 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
 */ /*-------------------------------------------------------------------*/

/**
 * \file  gl4cBufferStorageTests.hpp
 * \brief Declares test classes for "Buffer Storage" functionality.
 */ /*-------------------------------------------------------------------*/

#include "glcTestCase.hpp"
#include "glwDefs.hpp"

namespace gl4cts
{
namespace BufferStorage
{
class Buffer;

/** Implementation of test "Errors". Description follows:
 *
 * Verify that proper errors are generated:
 * - INVALID_OPERATION is generated by BufferStorage when 0 is bound to
 * <target>; Check all targets;
 * - INVLIAD_OPERATION is generated by BufferStorage, NamedBufferStorage and
 * BufferData if buffer already have immutable store;
 * - INVALID_VALUE is generated by BufferStorage and NamedBufferStorage when
 * <size> is less or equal to zero;
 * - INVLAID_VALUE is generated by BufferStorage and NamedBufferStorage when
 * <flags> contains MAP_PERSISTENT_BIT and neither MAP_READ_BIT nor
 * MAP_WRITE_BIT;
 * - INVALID_VALUE is generated by BufferStorage and NamedBufferStorage when
 * <flags> contains MAP_COHERENT_BIT and no MAP_PERSISTENT_BIT;
 * - INVALID_OPERATION is generated by MapBufferRange if any of:
 *   * MAP_COHERENT_BIT,
 *   * MAP_PERSISTENT_BIT,
 *   * MAP_READ_BIT,
 *   * MAP_WRITE_BIT
 * is included in <access> and not in buffer's storage flags;
 * - INVALID_OPERATION is generated by BufferSubData and NamedBufferSubData
 * when buffer has immutable store but its flags does not include
 * DYNAMIC_STORAGE.
 **/
class ErrorsTest : public deqp::TestCase
{
public:
	/* Public methods */
	ErrorsTest(deqp::Context& context);
	virtual ~ErrorsTest()
	{
	}

	/* Public methods inherited from TestCase */
	virtual tcu::TestNode::IterateResult iterate(void);

private:
	/* Private methods */
	void verifyError(glw::GLenum expected_error, const glw::GLchar* error_message, bool& out_test_result);
};

/** Implementation of test "GetBufferParameter". Description follows:
 *
 * Verify that proper values are reported for buffers with immutable store.
 *
 * Steps:
 * - prepare immutable buffer with tested set of <flags>;
 * - inspect <param> BUFFER_STORAGE_FLAGS to verify that correct flags are
 * reported;
 * - inspect <param> BUFFER_IMMUTABLE_STORAGE to verify that TRUE is reported;
 * - inspect <param> BUFFER_SIZE to verify that correct value is reported;
 * - if tested flags set allows mapping, for each valid <access> set:
 *   * execute MapBufferRange with given <access>
 *   * inspect <param> BUFFER_ACCESS_FLAGS to verify that correct values are
 *   reported;
 * - delete buffer.
 *
 * Repeat steps for all valid combinations of flags for BufferStorage.
 **/
class GetBufferParameterTest : public deqp::TestCase
{
public:
	/* Public methods */
	GetBufferParameterTest(deqp::Context& context);
	virtual ~GetBufferParameterTest()
	{
	}

	/* Public methods inherited from TestCase */
	virtual tcu::TestNode::IterateResult iterate(void);

private:
	/* Private types */
	struct testCase
	{
		testCase(glw::GLenum flags, glw::GLenum access);

		glw::GLenum m_flags;
		glw::GLenum m_access;
	};

	/* Private fields */
	std::vector<testCase> m_test_cases;
};

/** Implementation of test "DynamicStorage". Description follows:
 *
 * Verify that:
 * - server can update contents of immutable buffer when DYNAMIC_STORAGE_BIT is
 * not set;
 * - client cannot update contents of immutable buffer when DYNAMIC_STORAGE_BIT
 * is not set;
 * - client can update contents of immutable buffer when DYNAMIC_STORAGE_BIT is
 * set.
 *
 * Steps:
 * - prepare 64 bytes immutable buffer filled with value 1; Bind the buffer to
 * COPY_READ_BUFFER;
 * - prepare 64 bytes immutable buffer filled with value 2; Do not set
 * DYNAMIC_STORAGE_BIT for <flags>; Bind the buffer to COPY_WRITE_BUFFER;
 * - execute BufferSubData to update COPY_WRITE_BUFFER buffer with 64 bytes
 * filled with value 3; INVLIAD_OPERATION error should be generated;
 * - inspect contents of buffer to verify it is filled with 2;
 * - execute CopyBufferSubData to transfer data from COPY_READ_BUFFER to
 * COPY_WRITE_BUFFER; No error should be generated;
 * - inspect contents of buffer to verify it is filled with 1;
 * - delete buffer and create new one; This time <flags> should contain
 * DYNAMIC_STORAGE_BIT; Bind the buffer to COPY_WRITE_BUFFER;
 * - execute BufferSubData to update COPY_WRITE_BUFFER buffer with 64 bytes
 * filled with value 3; No error should be generated;
 * - inspect contents of buffer to verify it is filled with 3;
 **/
class DynamicStorageTest : public deqp::TestCase
{
public:
	/* Public methods */
	DynamicStorageTest(deqp::Context& context);
	virtual ~DynamicStorageTest()
	{
	}

	/* Public methods inherited from TestCase */
	virtual tcu::TestNode::IterateResult iterate(void);
};

/** Implementation of test "MapPersistentBufferSubData". Description follows:
 *
 * Verify that buffer mapped with MAP_PERSISTENT_BIT can be used by following
 * operations:
 * - BufferSubData,
 * - NamedBufferSubData.
 *
 * Steps:
 * - generate buffer and prepare its storage with BufferStorage; Use following
 * flags MAP_PERSISTENT_BIT, MAP_READ_BIT and MAP_WRITE_BIT;
 * Provide NULL as <data> and 64 as <size>;
 * - bind buffer to ARRAY_BUFFER;
 * - execute tested operation, to update whole buffer with incrementing values
 * starting from 0; No error should be generated;
 * - map buffer contents with MapBufferRange; <access> should contain
 * MAP_PERSISTENT_BIT, MAP_READ_BIT and MAP_WRITE_BIT; Provide 16 as <offset>
 * and <size>;
 * - mapped region should contain values from 16 to 31;
 * - execute tested operation, to update portions of buffer specified below;
 * No error should be generated;
 * - unmap buffer;
 * - map buffer contents again, this time do not provide MAP_PERSISTENT_BIT;
 * - execute tested operation to update regions specified below; It is expected
 * that INVALID_OPERATION will be generated for cases that cross mapped region;
 * No error should be generated for other cases.
 *
 * Repeat steps for all tested commands.
 *
 * Portions of buffer to be updated:
 *
 *   * before mapped region: <offset> 0,  <size> 16,
 *   * after mapped region:  <offset> 32, <size> 16,
 *   * at the beginning:     <offset> 8,  <size> 16,
 *   * at the end:           <offset> 24, <size> 16,
 *   * in the middle:        <offset> 12, <size> 8;
 **/
class MapPersistentBufferSubDataTest : public deqp::TestCase
{
public:
	/* Public methods */
	MapPersistentBufferSubDataTest(deqp::Context& context);
	virtual ~MapPersistentBufferSubDataTest()
	{
	}

	/* Public methods inherited from TestCase */
	virtual tcu::TestNode::IterateResult iterate(void);

private:
	/* Private types */
	struct testCase
	{
		glw::GLintptr   m_offset;
		glw::GLsizeiptr m_size;
		bool			m_cross_mapped_region;
	};
};

/** Implementation of test "MapPersistentTexture". Description follows:
 *
 * Verify that buffer mapped with MAP_PERSISTENT_BIT can be used by following
 * operations:
 * - CompressedTexImage operations,
 * - CompressedTexSubImage operations,
 * - CompressedTextureSubImage operations,
 * - TexImage operations,
 * - TexSubImage operations.
 *
 * Steps:
 * - generate buffer and prepare its storage with BufferStorage; Use following
 * flags MAP_READ_BIT, MAP_WRITE_BIT and MAP_PERSISTENT_BIT; Provide data
 * relevant for tested operation;
 * - bind buffer to PIXEL_UNPACK_BUFFER;
 * - prepare texture in a way that is relevant for tested operation;
 * - execute tested operation, no error should be generated;
 * - delete texture and prepare next one;
 * - map buffer contents with MapBufferRange, <access> should contain
 * MAP_PERSISTENT_BIT, MAP_READ_BIT and MAP_WRITE_BIT;
 * - execute tested operation, no error should be generated;
 * - delete texture and prepare next one;
 * - unmap buffer
 * - map buffer contents again, this time do not provide MAP_PERSISTENT_BIT;
 * - execute tested operation, INVALID_OPERATION error should be generated.
 *
 * Repeat steps for all tested commands.
 **/
class MapPersistentTextureTest : public deqp::TestCase
{
public:
	/* Public methods */
	MapPersistentTextureTest(deqp::Context& context);

	virtual ~MapPersistentTextureTest()
	{
	}

	/* Public methods inherited from TestCase */
	virtual tcu::TestNode::IterateResult iterate(void);

private:
	/* Private types */
	enum TESTED_OPERATION
	{
		OP_COMPRESSED_TEX_IMAGE = 0,
		OP_COMPRESSED_TEX_SUB_IMAGE,
		OP_COMPRESSED_TEXTURE_SUB_IMAGE,
		OP_TEX_IMAGE,
		OP_TEX_SUB_IMAGE,

		TESTED_OPERATION_MAX
	};

	void		getCompressedInfo();
	const char* getOperationName(TESTED_OPERATION operation);

	bool verifyTestedOperation(TESTED_OPERATION operation, Buffer& buffer, glw::GLenum expected_error);

	/* Private fields */
	glw::GLint m_compressed_image_size;
	glw::GLint m_compressed_internal_format;
};

/** Implementation of test "MapPersistentReadPixels". Description follows:
 *
 * Verify that buffer mapped with MAP_PERSISTENT_BIT can be used by ReadPixels.
 *
 * Steps:
 * - generate buffer and prepare its storage with BufferStorage; Use following
 * flags MAP_PERSISTENT_BIT, MAP_READ_BIT and MAP_WRITE_BIT;
 * Provide NULL as <data> and 64 as <size>;
 * - bind buffer to PIXEL_PACK_BUFFER;
 * - prepare 8x8 R8UI texture filled with unique values; Attach texture to FBO;
 * - execute ReadPixels to transfer texture contents to buffer, no error should
 * be generated;
 * - update contents of texture with different image;
 * - map buffer contents with MapBufferRange, <access> should contain
 * MAP_PERSISTENT_BIT, MAP_READ_BIT and MAP_WRITE_BIT;
 * - execute ReadPixels to transfer texture contents to buffer, no error should
 * be generated;
 * - execute MemoryBarrier with CLIENT_MAPPED_BUFFER_BARRIER_BIT and Finish;
 * - inspect contents of mapped buffer, to verify that latest data transfer was
 * successful;
 * - unmap buffer
 * - map buffer contents again, this time do not provide MAP_PERSISTENT_BIT;
 * - execute ReadPixels to transfer texture contents to buffer,
 * INVALID_OPERATION error should be generated.
 **/
class MapPersistentReadPixelsTest : public deqp::TestCase
{
public:
	/* Public methods */
	MapPersistentReadPixelsTest(deqp::Context& context);

	virtual ~MapPersistentReadPixelsTest()
	{
	}

	/* Public methods inherited from TestCase */
	virtual tcu::TestNode::IterateResult iterate(void);
};

/** Implementation of test "MapPersistentDispatch". Description follows:
 *
 * Test if dispatch operation can work with buffers mapped as
 * MAP_PERSISTENT_BIT.
 *
 * Steps:
 * - prepare program with compute shader that will:
 *   * calculate sum gl_GlobalInvocationID.x elements of source buffer;
 *   * store result in destination buffer at index gl_GlobalInvocationID.x;
 * Contents of both buffers should be treated as unsigned integers;
 * - prepare destination and source buffers as follows:
 *   * both are immutable;
 *   * both are 64 bytes long;
 *   * destination is filled with 0;
 *   * source is filled with specific unsigned integer values;
 *   * both shall have MAP_COHERENT_BIT and MAP_PERSISTENT_BIT flags set;
 *   * for source MAP_WRITE_BIT flag shall be set;
 *   * for destination MAP_READ_BIT flag shall be set;
 * - bind buffers to SHADER_STORAGE_BUFFER;
 * - use MapBufferRange to map both buffers; <access> shall be set as follows:
 *   * MAP_COHERENT_BIT and MAP_PERSISTENT_BIT flags set for both
 *   * MAP_WRITE_BIT flag shall be set for source;
 *   * MAP_READ_BIT flag shall be set for destination;
 * - dispatch program for 16x1x1 groups;
 * - execute Finish;
 * - modify contents of source buffer via mapped memory;
 * - inspect contents of destination buffer via mapped memory; It is expected
 * that it will contain results based on original content of source buffer;
 * - dispatch program for 16x1x1 groups;
 * - execute Finish;
 * - inspect contents of destination buffer via mapped memory; It is expected
 * that it will contain results based on modified content of source buffer.
 **/
class MapPersistentDispatchTest : public deqp::TestCase
{
public:
	/* Public methods */
	MapPersistentDispatchTest(deqp::Context& context);

	MapPersistentDispatchTest(deqp::Context& context, const glw::GLchar* test_name,
							  const glw::GLchar* test_description);

	virtual ~MapPersistentDispatchTest()
	{
	}

	/* Public methods inherited from TestCase */
	virtual tcu::TestNode::IterateResult iterate(void);
};

/** Implementation of test "MapPersistentFlush". Description follows:
 *
 * Test checks if FlushMappedBufferRange works correctly with persistent mapped
 * buffers.
 *
 * Modify MapPersistenDispatch in the following aspects:
 * - drop MAP_COHERENT_BIT for source buffer;
 * - apply FlushMappedBufferRange to ensure that modifications of source buffer
 * are visible to server.
 **/
class MapPersistentFlushTest : public deqp::TestCase
{
public:
	/* Public methods */
	MapPersistentFlushTest(deqp::Context& context);

	virtual ~MapPersistentFlushTest()
	{
	}

	/* Public methods inherited from TestCase */
	virtual tcu::TestNode::IterateResult iterate(void);
};

/** Implementation of test "MapPersistentDraw". Description follows:
 *
 * Test if draw operation can work with buffers mapped as MAP_PERSISTENT_BIT.
 *
 * Steps:
 * - prepare program consisting of vertex, geometry and fragment shader;
 *   * vertex shader should output single varying "vs_gs_index" of type uint,
 *   equal to gl_VertexID;
 *   * geometry shader should:
 *     - define single uniform buffer array "rectangles" with unspecified size;
 *     Rectangles should have two vec2 fields: position and size;
 *     - define single atomic_uint "atom_color";
 *     - increment "atom_color" once per execution;
 *     - output a quad that is placed at rectangles[vs_gs_index].position and
 *     has size equal rectangles[vs_gs_index].size;
 *     - define output float varying "gs_fs_color" equal to "atom_color" / 255;
 *   * fragment shader should pass value of "gs_fs_color" varying to red
 *   channel of output color;
 * - prepare FBO with 16x16 RGBA8 texture as color 0 attachment filled with 0;
 * - prepare immutable buffer with single unsigned integer bound to
 * "atom_color";
 * - prepare immutable buffer bound to "rectangles", with store for two sets of
 * data (2 * 2 * sizeof(vec2));
 * - make persistent mapping of both buffers for reads and writes;
 * - modify "rectangles" buffer via mapped memory with the following two sets
 *   * position [-0.5,-0.5], size [1.0,1.0],
 *   * position [-0.25,-0.25], size [1.5,1.5];
 * - modify "atom_color" buffer via mapped memory to value 1;
 * - execute MemoryBarrier for CLIENT_MAPPED_BUFFER_BARRIER_BIT;
 * - enable blending with functions ONE for both source and destination;
 * - execute DrawArrays for two vertices;
 * - execute MemoryBarrier for ALL_BARRIER_BITS and Finish;
 * - inspect contents of:
 *   * texture - to verify that pixel at 8,8 is filled with RGBA8(3,0,0,0),
 *   * "atom_color" - to verify that it is equal to 3;
 * - modify "rectangles" buffer via mapped memory with the following two sets
 *   * position [-1.0,-1.0], size [0.5,0.5],
 *   * position [0.5,0.5], size [0.5,0.5];
 * - modify "atom_color" buffer via mapped memory to value 5;
 * - execute MemoryBarrier for CLIENT_MAPPED_BUFFER_BARRIER_BIT;
 * - execute DrawArrays for two vertices;
 * - execute MemoryBarrier for ALL_BARRIER_BITS and Finish;
 * - inspect contents of:
 *   * texture - to verify that pixel at 8,8 is filled with RGBA8(3,0,0,0),
 *   * "atom_color" - to verify that it is equal to 7;
 *
 *  OpenGL 4.5 Changes
 *
 *      The OpenGL 4.5 specification changed wording from:
 *          "If MAP_COHERENT_BIT is not set and the client performs a write followed
 *           by a call to the MemoryBarrier command with the CLIENT_MAPPED_BUFFER_BARRIER_BIT set,
 *           then in subsequent commands the server will see the writes." (OpenGL 4.4, chapter 6.2)
 *      to form:
 *          "If MAP_COHERENT_BIT is not set and the client performs a write followed by
 *           a call to one of the FlushMapped*BufferRange commands with a range including
 *           the written range, then in subsequent commands the server will see the writes."
 *          (OpenGL 4.5, chapter 6.2).
 *      As a results writes to persistently mapped buffer shall be followed by FlushMapped*BufferRange
 *      not the MemoryBarrier (MemoryBarrier only synchronizes form GPU to the CPU).
 *
 *      Steps:
 *          Change MemoryBarrier to FlushMapped*BufferRange if context supports OpenGL 4.5 Core Profile.
 *
 **/
class MapPersistentDrawTest : public deqp::TestCase
{
public:
	/* Public methods */
	MapPersistentDrawTest(deqp::Context& context);

	virtual ~MapPersistentDrawTest()
	{
	}

	/* Public methods inherited from TestCase */
	virtual tcu::TestNode::IterateResult iterate(void);
};
} /* BufferStorage */

/** Group class for Buffer Storage conformance tests */
class BufferStorageTests : public deqp::TestCaseGroup
{
public:
	/* Public methods */
	BufferStorageTests(deqp::Context& context);

	virtual ~BufferStorageTests(void)
	{
	}

	virtual void init(void);

private:
	/* Private methods */
	BufferStorageTests(const BufferStorageTests& other);
	BufferStorageTests& operator=(const BufferStorageTests& other);
};

} /* gl4cts */

#endif // _GL4CBUFFERSTORAGETESTS_HPP