mirror of
https://github.com/godotengine/godot.git
synced 2024-12-03 09:52:18 +08:00
123 lines
3.0 KiB
C++
123 lines
3.0 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"
|
|
|
|
namespace Etc
|
|
{
|
|
class Block4x4EncodingBits_R11;
|
|
|
|
// ################################################################################
|
|
// Block4x4Encoding_R11
|
|
// ################################################################################
|
|
|
|
class Block4x4Encoding_R11 : public Block4x4Encoding_RGB8
|
|
{
|
|
public:
|
|
|
|
Block4x4Encoding_R11(void);
|
|
virtual ~Block4x4Encoding_R11(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);
|
|
|
|
inline float GetRedBase(void) const
|
|
{
|
|
return m_fRedBase;
|
|
}
|
|
|
|
inline float GetRedMultiplier(void) const
|
|
{
|
|
return m_fRedMultiplier;
|
|
}
|
|
|
|
inline int GetRedTableIndex(void) const
|
|
{
|
|
return m_uiRedModifierTableIndex;
|
|
}
|
|
|
|
inline const unsigned int * GetRedSelectors(void) const
|
|
{
|
|
return m_auiRedSelectors;
|
|
}
|
|
|
|
protected:
|
|
|
|
static const unsigned int MODIFIER_TABLE_ENTRYS = 16;
|
|
static const unsigned int SELECTOR_BITS = 3;
|
|
static const unsigned int SELECTORS = 1 << SELECTOR_BITS;
|
|
|
|
static float s_aafModifierTable[MODIFIER_TABLE_ENTRYS][SELECTORS];
|
|
|
|
void CalculateR11(unsigned int a_uiSelectorsUsed,
|
|
float a_fBaseRadius, float a_fMultiplierRadius);
|
|
|
|
|
|
|
|
|
|
inline float DecodePixelRed(float a_fBase, float a_fMultiplier,
|
|
unsigned int a_uiTableIndex, unsigned int a_uiSelector)
|
|
{
|
|
float fMultiplier = a_fMultiplier;
|
|
if (fMultiplier <= 0.0f)
|
|
{
|
|
fMultiplier = 1.0f / 8.0f;
|
|
}
|
|
|
|
float fPixelRed = a_fBase * 8 + 4 +
|
|
8 * fMultiplier*s_aafModifierTable[a_uiTableIndex][a_uiSelector]*255;
|
|
fPixelRed /= 2047.0f;
|
|
|
|
if (fPixelRed < 0.0f)
|
|
{
|
|
fPixelRed = 0.0f;
|
|
}
|
|
else if (fPixelRed > 1.0f)
|
|
{
|
|
fPixelRed = 1.0f;
|
|
}
|
|
|
|
return fPixelRed;
|
|
}
|
|
|
|
Block4x4EncodingBits_R11 *m_pencodingbitsR11;
|
|
|
|
float m_fRedBase;
|
|
float m_fRedMultiplier;
|
|
float m_fRedBlockError;
|
|
unsigned int m_uiRedModifierTableIndex;
|
|
unsigned int m_auiRedSelectors[PIXELS];
|
|
|
|
|
|
};
|
|
|
|
// ----------------------------------------------------------------------------------------------------
|
|
//
|
|
|
|
} // namespace Etc
|