mirror of
https://github.com/godotengine/godot.git
synced 2024-12-09 10:09:20 +08:00
6a9c990da7
Remove rg-etc1 code. Also updated travis to use ubuntu 14.04. Fixes #8457.
149 lines
3.3 KiB
C++
149 lines
3.3 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 "EtcColorFloatRGBA.h"
|
|
|
|
#include "EtcErrorMetric.h"
|
|
|
|
#include <assert.h>
|
|
#include <float.h>
|
|
|
|
namespace Etc
|
|
{
|
|
class Block4x4;
|
|
|
|
// abstract base class for specific encodings
|
|
class Block4x4Encoding
|
|
{
|
|
public:
|
|
|
|
static const unsigned int ROWS = 4;
|
|
static const unsigned int COLUMNS = 4;
|
|
static const unsigned int PIXELS = ROWS * COLUMNS;
|
|
static const float LUMA_WEIGHT;
|
|
static const float CHROMA_BLUE_WEIGHT;
|
|
|
|
typedef enum
|
|
{
|
|
MODE_UNKNOWN,
|
|
//
|
|
MODE_ETC1,
|
|
MODE_T,
|
|
MODE_H,
|
|
MODE_PLANAR,
|
|
MODE_R11,
|
|
MODE_RG11,
|
|
//
|
|
MODES
|
|
} Mode;
|
|
|
|
Block4x4Encoding(void);
|
|
//virtual ~Block4x4Encoding(void) =0;
|
|
virtual ~Block4x4Encoding(void) {}
|
|
virtual void InitFromSource(Block4x4 *a_pblockParent,
|
|
ColorFloatRGBA *a_pafrgbaSource,
|
|
|
|
unsigned char *a_paucEncodingBits, ErrorMetric a_errormetric) = 0;
|
|
|
|
virtual void InitFromEncodingBits(Block4x4 *a_pblockParent,
|
|
unsigned char *a_paucEncodingBits,
|
|
ColorFloatRGBA *a_pafrgbaSource,
|
|
|
|
ErrorMetric a_errormetric) = 0;
|
|
|
|
// perform an iteration of the encoding
|
|
// the first iteration must generate a complete, valid (if poor) encoding
|
|
virtual void PerformIteration(float a_fEffort) = 0;
|
|
|
|
void CalcBlockError(void);
|
|
|
|
inline float GetError(void)
|
|
{
|
|
assert(m_fError >= 0.0f);
|
|
|
|
return m_fError;
|
|
}
|
|
|
|
inline ColorFloatRGBA * GetDecodedColors(void)
|
|
{
|
|
return m_afrgbaDecodedColors;
|
|
}
|
|
|
|
inline float * GetDecodedAlphas(void)
|
|
{
|
|
return m_afDecodedAlphas;
|
|
}
|
|
|
|
virtual void SetEncodingBits(void) = 0;
|
|
|
|
virtual bool GetFlip(void) = 0;
|
|
|
|
virtual bool IsDifferential(void) = 0;
|
|
|
|
virtual bool HasSeverelyBentDifferentialColors(void) const = 0;
|
|
|
|
inline Mode GetMode(void)
|
|
{
|
|
return m_mode;
|
|
}
|
|
|
|
inline bool IsDone(void)
|
|
{
|
|
return m_boolDone;
|
|
}
|
|
|
|
inline void SetDoneIfPerfect()
|
|
{
|
|
if (GetError() == 0.0f)
|
|
{
|
|
m_boolDone = true;
|
|
}
|
|
}
|
|
|
|
float CalcPixelError(ColorFloatRGBA a_frgbaDecodedColor, float a_fDecodedAlpha,
|
|
ColorFloatRGBA a_frgbaSourcePixel);
|
|
|
|
protected:
|
|
|
|
void Init(Block4x4 *a_pblockParent,
|
|
ColorFloatRGBA *a_pafrgbaSource,
|
|
|
|
ErrorMetric a_errormetric);
|
|
|
|
Block4x4 *m_pblockParent;
|
|
ColorFloatRGBA *m_pafrgbaSource;
|
|
|
|
bool m_boolBorderPixels; // if block has any border pixels
|
|
|
|
ColorFloatRGBA m_afrgbaDecodedColors[PIXELS]; // decoded RGB components, ignore Alpha
|
|
float m_afDecodedAlphas[PIXELS]; // decoded alpha component
|
|
float m_fError; // error for RGBA relative to m_pafrgbaSource
|
|
|
|
// intermediate encoding
|
|
Mode m_mode;
|
|
|
|
unsigned int m_uiEncodingIterations;
|
|
bool m_boolDone; // all iterations have been done
|
|
ErrorMetric m_errormetric;
|
|
|
|
private:
|
|
|
|
};
|
|
|
|
} // namespace Etc
|