godot/thirdparty/etc2comp/EtcBlock4x4Encoding_RGB8A1.h
Ferenc Arn 6a9c990da7 Add ETC1/ETC2 compression support though etc2comp.
Remove rg-etc1 code. Also updated travis to use ubuntu 14.04.

Fixes #8457.
2017-05-31 18:59:00 -05:00

130 lines
3.7 KiB
C++

/*
* Copyright 2015 The Etc2Comp Authors.
*
* 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.
*/
#pragma once
#include "EtcBlock4x4Encoding_RGB8.h"
#include "EtcErrorMetric.h"
#include "EtcBlock4x4EncodingBits.h"
namespace Etc
{
// ################################################################################
// Block4x4Encoding_RGB8A1
// RGB8A1 if not completely opaque or transparent
// ################################################################################
class Block4x4Encoding_RGB8A1 : public Block4x4Encoding_RGB8
{
public:
static const unsigned int TRANSPARENT_SELECTOR = 2;
Block4x4Encoding_RGB8A1(void);
virtual ~Block4x4Encoding_RGB8A1(void);
virtual void InitFromSource(Block4x4 *a_pblockParent,
ColorFloatRGBA *a_pafrgbaSource,
unsigned char *a_paucEncodingBits,
ErrorMetric a_errormetric);
virtual void InitFromEncodingBits(Block4x4 *a_pblockParent,
unsigned char *a_paucEncodingBits,
ColorFloatRGBA *a_pafrgbaSource,
ErrorMetric a_errormetric);
virtual void PerformIteration(float a_fEffort);
virtual void SetEncodingBits(void);
void InitFromEncodingBits_ETC1(Block4x4 *a_pblockParent,
unsigned char *a_paucEncodingBits,
ColorFloatRGBA *a_pafrgbaSource,
ErrorMetric a_errormetric);
void InitFromEncodingBits_T(void);
void InitFromEncodingBits_H(void);
void PerformFirstIteration(void);
void Decode_ETC1(void);
void DecodePixels_T(void);
void DecodePixels_H(void);
void SetEncodingBits_ETC1(void);
void SetEncodingBits_T(void);
void SetEncodingBits_H(void);
protected:
bool m_boolOpaque; // all source pixels have alpha >= 0.5
bool m_boolTransparent; // all source pixels have alpha < 0.5
bool m_boolPunchThroughPixels; // some source pixels have alpha < 0.5
static float s_aafCwOpaqueUnsetTable[CW_RANGES][SELECTORS];
private:
void TryDifferential(bool a_boolFlip, unsigned int a_uiRadius,
int a_iGrayOffset1, int a_iGrayOffset2);
void TryDifferentialHalf(DifferentialTrys::Half *a_phalf);
void TryT(unsigned int a_uiRadius);
void TryT_BestSelectorCombination(void);
void TryH(unsigned int a_uiRadius);
void TryH_BestSelectorCombination(void);
void TryDegenerates1(void);
void TryDegenerates2(void);
void TryDegenerates3(void);
void TryDegenerates4(void);
};
// ################################################################################
// Block4x4Encoding_RGB8A1_Opaque
// RGB8A1 if all pixels have alpha==1
// ################################################################################
class Block4x4Encoding_RGB8A1_Opaque : public Block4x4Encoding_RGB8A1
{
public:
virtual void PerformIteration(float a_fEffort);
void PerformFirstIteration(void);
private:
};
// ################################################################################
// Block4x4Encoding_RGB8A1_Transparent
// RGB8A1 if all pixels have alpha==0
// ################################################################################
class Block4x4Encoding_RGB8A1_Transparent : public Block4x4Encoding_RGB8A1
{
public:
virtual void PerformIteration(float a_fEffort);
private:
};
} // namespace Etc