tcuCompressedTexture.cpp - Android社区 - https://www.androidos.net.cn/

/*-------------------------------------------------------------------------
 * drawElements Quality Program Tester Core
 * ----------------------------------------
 *
 * 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 Compressed Texture Utilities.
 *//*--------------------------------------------------------------------*/

#include "tcuCompressedTexture.hpp"
#include "tcuTextureUtil.hpp"
#include "tcuAstcUtil.hpp"

#include "deStringUtil.hpp"
#include "deFloat16.h"

#include <algorithm>

namespace tcu
{

int getBlockSize (CompressedTexFormat format)
{
	if (isAstcFormat(format))
	{
		return astc::BLOCK_SIZE_BYTES;
	}
	else if (isEtcFormat(format))
	{
		switch (format)
		{
			case COMPRESSEDTEXFORMAT_ETC1_RGB8:							return 8;
			case COMPRESSEDTEXFORMAT_EAC_R11:							return 8;
			case COMPRESSEDTEXFORMAT_EAC_SIGNED_R11:					return 8;
			case COMPRESSEDTEXFORMAT_EAC_RG11:							return 16;
			case COMPRESSEDTEXFORMAT_EAC_SIGNED_RG11:					return 16;
			case COMPRESSEDTEXFORMAT_ETC2_RGB8:							return 8;
			case COMPRESSEDTEXFORMAT_ETC2_SRGB8:						return 8;
			case COMPRESSEDTEXFORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1:		return 8;
			case COMPRESSEDTEXFORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1:	return 8;
			case COMPRESSEDTEXFORMAT_ETC2_EAC_RGBA8:					return 16;
			case COMPRESSEDTEXFORMAT_ETC2_EAC_SRGB8_ALPHA8:				return 16;

default:
				DE_ASSERT(false);
				return -1;
		}
	}
	else if (isBcFormat(format))
	{
		switch (format)
		{
			case COMPRESSEDTEXFORMAT_BC1_RGB_UNORM_BLOCK:				return 8;
			case COMPRESSEDTEXFORMAT_BC1_RGB_SRGB_BLOCK:				return 8;
			case COMPRESSEDTEXFORMAT_BC1_RGBA_UNORM_BLOCK:				return 8;
			case COMPRESSEDTEXFORMAT_BC1_RGBA_SRGB_BLOCK:				return 8;
			case COMPRESSEDTEXFORMAT_BC2_UNORM_BLOCK:					return 16;
			case COMPRESSEDTEXFORMAT_BC2_SRGB_BLOCK:					return 16;
			case COMPRESSEDTEXFORMAT_BC3_UNORM_BLOCK:					return 16;
			case COMPRESSEDTEXFORMAT_BC3_SRGB_BLOCK:					return 16;
			case COMPRESSEDTEXFORMAT_BC4_UNORM_BLOCK:					return 8;
			case COMPRESSEDTEXFORMAT_BC4_SNORM_BLOCK:					return 8;
			case COMPRESSEDTEXFORMAT_BC5_UNORM_BLOCK:					return 16;
			case COMPRESSEDTEXFORMAT_BC5_SNORM_BLOCK:					return 16;
			case COMPRESSEDTEXFORMAT_BC6H_UFLOAT_BLOCK:					return 16;
			case COMPRESSEDTEXFORMAT_BC6H_SFLOAT_BLOCK:					return 16;
			case COMPRESSEDTEXFORMAT_BC7_UNORM_BLOCK:					return 16;
			case COMPRESSEDTEXFORMAT_BC7_SRGB_BLOCK:					return 16;

default:
				DE_ASSERT(false);
				return -1;
		}
	}
	else
	{
		DE_ASSERT(false);
		return -1;
	}
}

IVec3 getBlockPixelSize (CompressedTexFormat format)
{
	if (isEtcFormat(format))
	{
		return IVec3(4, 4, 1);
	}
	else if (isAstcFormat(format))
	{
		switch (format)
		{
			case COMPRESSEDTEXFORMAT_ASTC_4x4_RGBA:				return IVec3(4,  4,  1);
			case COMPRESSEDTEXFORMAT_ASTC_5x4_RGBA:				return IVec3(5,  4,  1);
			case COMPRESSEDTEXFORMAT_ASTC_5x5_RGBA:				return IVec3(5,  5,  1);
			case COMPRESSEDTEXFORMAT_ASTC_6x5_RGBA:				return IVec3(6,  5,  1);
			case COMPRESSEDTEXFORMAT_ASTC_6x6_RGBA:				return IVec3(6,  6,  1);
			case COMPRESSEDTEXFORMAT_ASTC_8x5_RGBA:				return IVec3(8,  5,  1);
			case COMPRESSEDTEXFORMAT_ASTC_8x6_RGBA:				return IVec3(8,  6,  1);
			case COMPRESSEDTEXFORMAT_ASTC_8x8_RGBA:				return IVec3(8,  8,  1);
			case COMPRESSEDTEXFORMAT_ASTC_10x5_RGBA:			return IVec3(10, 5,  1);
			case COMPRESSEDTEXFORMAT_ASTC_10x6_RGBA:			return IVec3(10, 6,  1);
			case COMPRESSEDTEXFORMAT_ASTC_10x8_RGBA:			return IVec3(10, 8,  1);
			case COMPRESSEDTEXFORMAT_ASTC_10x10_RGBA:			return IVec3(10, 10, 1);
			case COMPRESSEDTEXFORMAT_ASTC_12x10_RGBA:			return IVec3(12, 10, 1);
			case COMPRESSEDTEXFORMAT_ASTC_12x12_RGBA:			return IVec3(12, 12, 1);
			case COMPRESSEDTEXFORMAT_ASTC_4x4_SRGB8_ALPHA8:		return IVec3(4,  4,  1);
			case COMPRESSEDTEXFORMAT_ASTC_5x4_SRGB8_ALPHA8:		return IVec3(5,  4,  1);
			case COMPRESSEDTEXFORMAT_ASTC_5x5_SRGB8_ALPHA8:		return IVec3(5,  5,  1);
			case COMPRESSEDTEXFORMAT_ASTC_6x5_SRGB8_ALPHA8:		return IVec3(6,  5,  1);
			case COMPRESSEDTEXFORMAT_ASTC_6x6_SRGB8_ALPHA8:		return IVec3(6,  6,  1);
			case COMPRESSEDTEXFORMAT_ASTC_8x5_SRGB8_ALPHA8:		return IVec3(8,  5,  1);
			case COMPRESSEDTEXFORMAT_ASTC_8x6_SRGB8_ALPHA8:		return IVec3(8,  6,  1);
			case COMPRESSEDTEXFORMAT_ASTC_8x8_SRGB8_ALPHA8:		return IVec3(8,  8,  1);
			case COMPRESSEDTEXFORMAT_ASTC_10x5_SRGB8_ALPHA8:	return IVec3(10, 5,  1);
			case COMPRESSEDTEXFORMAT_ASTC_10x6_SRGB8_ALPHA8:	return IVec3(10, 6,  1);
			case COMPRESSEDTEXFORMAT_ASTC_10x8_SRGB8_ALPHA8:	return IVec3(10, 8,  1);
			case COMPRESSEDTEXFORMAT_ASTC_10x10_SRGB8_ALPHA8:	return IVec3(10, 10, 1);
			case COMPRESSEDTEXFORMAT_ASTC_12x10_SRGB8_ALPHA8:	return IVec3(12, 10, 1);
			case COMPRESSEDTEXFORMAT_ASTC_12x12_SRGB8_ALPHA8:	return IVec3(12, 12, 1);

default:
				DE_ASSERT(false);
				return IVec3();
		}
	}
	else if (isBcFormat(format))
	{
		return IVec3(4, 4, 1);
	}
	else
	{
		DE_ASSERT(false);
		return IVec3(-1);
	}
}

bool isEtcFormat (CompressedTexFormat format)
{
	switch (format)
	{
		case COMPRESSEDTEXFORMAT_ETC1_RGB8:
		case COMPRESSEDTEXFORMAT_EAC_R11:
		case COMPRESSEDTEXFORMAT_EAC_SIGNED_R11:
		case COMPRESSEDTEXFORMAT_EAC_RG11:
		case COMPRESSEDTEXFORMAT_EAC_SIGNED_RG11:
		case COMPRESSEDTEXFORMAT_ETC2_RGB8:
		case COMPRESSEDTEXFORMAT_ETC2_SRGB8:
		case COMPRESSEDTEXFORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1:
		case COMPRESSEDTEXFORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1:
		case COMPRESSEDTEXFORMAT_ETC2_EAC_RGBA8:
		case COMPRESSEDTEXFORMAT_ETC2_EAC_SRGB8_ALPHA8:
			return true;