673 lines
15 KiB
C++
673 lines
15 KiB
C++
// basisu_global_selector_palette.h
|
|
// Copyright (C) 2019 Binomial LLC. All Rights Reserved.
|
|
//
|
|
// 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 "basisu_transcoder_internal.h"
|
|
#include <algorithm>
|
|
|
|
namespace basist
|
|
{
|
|
class etc1_global_palette_entry_modifier
|
|
{
|
|
public:
|
|
enum { cTotalBits = 15, cTotalValues = 1 << cTotalBits };
|
|
|
|
etc1_global_palette_entry_modifier(uint32_t index = 0)
|
|
{
|
|
#ifdef _DEBUG
|
|
static bool s_tested;
|
|
if (!s_tested)
|
|
{
|
|
s_tested = true;
|
|
for (uint32_t i = 0; i < cTotalValues; i++)
|
|
{
|
|
etc1_global_palette_entry_modifier m(i);
|
|
etc1_global_palette_entry_modifier n = m;
|
|
|
|
assert(n.get_index() == i);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
set_index(index);
|
|
}
|
|
|
|
void set_index(uint32_t index)
|
|
{
|
|
assert(index < cTotalValues);
|
|
m_rot = index & 3;
|
|
m_flip = (index >> 2) & 1;
|
|
m_inv = (index >> 3) & 1;
|
|
m_contrast = (index >> 4) & 3;
|
|
m_shift = (index >> 6) & 1;
|
|
m_median = (index >> 7) & 1;
|
|
m_div = (index >> 8) & 1;
|
|
m_rand = (index >> 9) & 1;
|
|
m_dilate = (index >> 10) & 1;
|
|
m_shift_x = (index >> 11) & 1;
|
|
m_shift_y = (index >> 12) & 1;
|
|
m_erode = (index >> 13) & 1;
|
|
m_high_pass = (index >> 14) & 1;
|
|
}
|
|
|
|
uint32_t get_index() const
|
|
{
|
|
return m_rot | (m_flip << 2) | (m_inv << 3) | (m_contrast << 4) | (m_shift << 6) | (m_median << 7) | (m_div << 8) | (m_rand << 9) | (m_dilate << 10) | (m_shift_x << 11) | (m_shift_y << 12) | (m_erode << 13) | (m_high_pass << 14);
|
|
}
|
|
|
|
void clear()
|
|
{
|
|
basisu::clear_obj(*this);
|
|
}
|
|
|
|
uint8_t m_contrast;
|
|
bool m_rand;
|
|
bool m_median;
|
|
bool m_div;
|
|
bool m_shift;
|
|
bool m_inv;
|
|
bool m_flip;
|
|
bool m_dilate;
|
|
bool m_shift_x;
|
|
bool m_shift_y;
|
|
bool m_erode;
|
|
bool m_high_pass;
|
|
uint8_t m_rot;
|
|
};
|
|
|
|
enum modifier_types
|
|
{
|
|
cModifierContrast,
|
|
cModifierRand,
|
|
cModifierMedian,
|
|
cModifierDiv,
|
|
cModifierShift,
|
|
cModifierInv,
|
|
cModifierFlippedAndRotated,
|
|
cModifierDilate,
|
|
cModifierShiftX,
|
|
cModifierShiftY,
|
|
cModifierErode,
|
|
cModifierHighPass,
|
|
cTotalModifiers
|
|
};
|
|
|
|
#define ETC1_GLOBAL_SELECTOR_CODEBOOK_MAX_MOD_BITS (etc1_global_palette_entry_modifier::cTotalBits)
|
|
|
|
struct etc1_selector_palette_entry
|
|
{
|
|
etc1_selector_palette_entry()
|
|
{
|
|
clear();
|
|
}
|
|
|
|
void clear()
|
|
{
|
|
basisu::clear_obj(*this);
|
|
}
|
|
|
|
uint8_t operator[] (uint32_t i) const { assert(i < 16); return m_selectors[i]; }
|
|
uint8_t&operator[] (uint32_t i) { assert(i < 16); return m_selectors[i]; }
|
|
|
|
void set_uint32(uint32_t v)
|
|
{
|
|
for (uint32_t byte_index = 0; byte_index < 4; byte_index++)
|
|
{
|
|
uint32_t b = (v >> (byte_index * 8)) & 0xFF;
|
|
|
|
m_selectors[byte_index * 4 + 0] = b & 3;
|
|
m_selectors[byte_index * 4 + 1] = (b >> 2) & 3;
|
|
m_selectors[byte_index * 4 + 2] = (b >> 4) & 3;
|
|
m_selectors[byte_index * 4 + 3] = (b >> 6) & 3;
|
|
}
|
|
}
|
|
|
|
uint32_t get_uint32() const
|
|
{
|
|
return get_byte(0) | (get_byte(1) << 8) | (get_byte(2) << 16) | (get_byte(3) << 24);
|
|
}
|
|
|
|
uint32_t get_byte(uint32_t byte_index) const
|
|
{
|
|
assert(byte_index < 4);
|
|
|
|
return m_selectors[byte_index * 4 + 0] |
|
|
(m_selectors[byte_index * 4 + 1] << 2) |
|
|
(m_selectors[byte_index * 4 + 2] << 4) |
|
|
(m_selectors[byte_index * 4 + 3] << 6);
|
|
}
|
|
|
|
uint8_t operator()(uint32_t x, uint32_t y) const { assert((x < 4) && (y < 4)); return m_selectors[x + y * 4]; }
|
|
uint8_t&operator()(uint32_t x, uint32_t y) { assert((x < 4) && (y < 4)); return m_selectors[x + y * 4]; }
|
|
|
|
uint32_t calc_distance(const etc1_selector_palette_entry &other) const
|
|
{
|
|
uint32_t dist = 0;
|
|
for (uint32_t i = 0; i < 8; i++)
|
|
{
|
|
int delta = static_cast<int>(m_selectors[i]) - static_cast<int>(other.m_selectors[i]);
|
|
dist += delta * delta;
|
|
}
|
|
return dist;
|
|
}
|
|
|
|
#if 0
|
|
uint32_t calc_hamming_dist(const etc1_selector_palette_entry &other) const
|
|
{
|
|
uint32_t dist = 0;
|
|
for (uint32_t i = 0; i < 4; i++)
|
|
dist += g_hamming_dist[get_byte(i) ^ other.get_byte(i)];
|
|
return dist;
|
|
}
|
|
#endif
|
|
|
|
etc1_selector_palette_entry get_inverted() const
|
|
{
|
|
etc1_selector_palette_entry result;
|
|
|
|
for (uint32_t i = 0; i < 16; i++)
|
|
result.m_selectors[i] = 3 - m_selectors[i];
|
|
|
|
return result;
|
|
}
|
|
|
|
etc1_selector_palette_entry get_divided() const
|
|
{
|
|
etc1_selector_palette_entry result;
|
|
|
|
const uint8_t div_selector[4] = { 2, 0, 3, 1 };
|
|
|
|
for (uint32_t i = 0; i < 16; i++)
|
|
result.m_selectors[i] = div_selector[m_selectors[i]];
|
|
|
|
return result;
|
|
}
|
|
|
|
etc1_selector_palette_entry get_shifted(int delta) const
|
|
{
|
|
etc1_selector_palette_entry result;
|
|
|
|
for (uint32_t i = 0; i < 16; i++)
|
|
result.m_selectors[i] = static_cast<uint8_t>(basisu::clamp<int>(m_selectors[i] + delta, 0, 3));
|
|
|
|
return result;
|
|
}
|
|
|
|
etc1_selector_palette_entry get_randomized() const
|
|
{
|
|
uint32_t seed = get_uint32();
|
|
|
|
etc1_selector_palette_entry result;
|
|
|
|
for (uint32_t y = 0; y < 4; y++)
|
|
{
|
|
for (uint32_t x = 0; x < 4; x++)
|
|
{
|
|
int s = (*this)(x, y);
|
|
|
|
// between 0 and 10
|
|
uint32_t i = basisd_urand(seed, 6) + basisd_urand(seed, 6);
|
|
if (i == 0)
|
|
s -= 2;
|
|
else if (i == 10)
|
|
s += 2;
|
|
else if (i < 3)
|
|
s -= 1;
|
|
else if (i > 7)
|
|
s += 1;
|
|
|
|
result(x, y) = static_cast<uint8_t>(basisu::clamp<int>(s, 0, 3));
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
etc1_selector_palette_entry get_contrast(int table_index) const
|
|
{
|
|
assert(table_index < 4);
|
|
|
|
etc1_selector_palette_entry result;
|
|
|
|
static const uint8_t s_contrast_tables[4][4] =
|
|
{
|
|
{ 0, 1, 2, 3 }, // not used
|
|
{ 0, 0, 3, 3 },
|
|
{ 1, 1, 2, 2 },
|
|
{ 1, 1, 3, 3 }
|
|
};
|
|
|
|
for (uint32_t i = 0; i < 16; i++)
|
|
{
|
|
result[i] = s_contrast_tables[table_index][(*this)[i]];
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
etc1_selector_palette_entry get_dilated() const
|
|
{
|
|
etc1_selector_palette_entry result;
|
|
|
|
for (uint32_t y = 0; y < 4; y++)
|
|
{
|
|
for (uint32_t x = 0; x < 4; x++)
|
|
{
|
|
uint32_t max_selector = 0;
|
|
|
|
for (int yd = -1; yd <= 1; yd++)
|
|
{
|
|
int fy = y + yd;
|
|
if ((fy < 0) || (fy > 3))
|
|
continue;
|
|
|
|
for (int xd = -1; xd <= 1; xd++)
|
|
{
|
|
int fx = x + xd;
|
|
if ((fx < 0) || (fx > 3))
|
|
continue;
|
|
|
|
max_selector = basisu::maximum<uint32_t>(max_selector, (*this)(fx, fy));
|
|
}
|
|
}
|
|
|
|
result(x, y) = static_cast<uint8_t>(max_selector);
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
etc1_selector_palette_entry get_eroded() const
|
|
{
|
|
etc1_selector_palette_entry result;
|
|
|
|
for (uint32_t y = 0; y < 4; y++)
|
|
{
|
|
for (uint32_t x = 0; x < 4; x++)
|
|
{
|
|
uint32_t min_selector = 99;
|
|
|
|
for (int yd = -1; yd <= 1; yd++)
|
|
{
|
|
int fy = y + yd;
|
|
if ((fy < 0) || (fy > 3))
|
|
continue;
|
|
|
|
for (int xd = -1; xd <= 1; xd++)
|
|
{
|
|
int fx = x + xd;
|
|
if ((fx < 0) || (fx > 3))
|
|
continue;
|
|
|
|
min_selector = basisu::minimum<uint32_t>(min_selector, (*this)(fx, fy));
|
|
}
|
|
}
|
|
|
|
result(x, y) = static_cast<uint8_t>(min_selector);
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
etc1_selector_palette_entry get_shift_x() const
|
|
{
|
|
etc1_selector_palette_entry result;
|
|
|
|
for (uint32_t y = 0; y < 4; y++)
|
|
{
|
|
for (uint32_t x = 0; x < 4; x++)
|
|
{
|
|
int sx = x - 1;
|
|
if (sx < 0)
|
|
sx = 0;
|
|
|
|
result(x, y) = (*this)(sx, y);
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
etc1_selector_palette_entry get_shift_y() const
|
|
{
|
|
etc1_selector_palette_entry result;
|
|
|
|
for (uint32_t y = 0; y < 4; y++)
|
|
{
|
|
int sy = y - 1;
|
|
if (sy < 0)
|
|
sy = 3;
|
|
|
|
for (uint32_t x = 0; x < 4; x++)
|
|
result(x, y) = (*this)(x, sy);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
etc1_selector_palette_entry get_median() const
|
|
{
|
|
etc1_selector_palette_entry result;
|
|
|
|
for (uint32_t y = 0; y < 4; y++)
|
|
{
|
|
for (uint32_t x = 0; x < 4; x++)
|
|
{
|
|
// ABC
|
|
// D F
|
|
// GHI
|
|
|
|
uint8_t selectors[8];
|
|
uint32_t n = 0;
|
|
|
|
for (int yd = -1; yd <= 1; yd++)
|
|
{
|
|
int fy = y + yd;
|
|
if ((fy < 0) || (fy > 3))
|
|
continue;
|
|
|
|
for (int xd = -1; xd <= 1; xd++)
|
|
{
|
|
if ((xd | yd) == 0)
|
|
continue;
|
|
|
|
int fx = x + xd;
|
|
if ((fx < 0) || (fx > 3))
|
|
continue;
|
|
|
|
selectors[n++] = (*this)(fx, fy);
|
|
}
|
|
}
|
|
|
|
std::sort(selectors, selectors + n);
|
|
|
|
result(x, y) = selectors[n / 2];
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
etc1_selector_palette_entry get_high_pass() const
|
|
{
|
|
etc1_selector_palette_entry result;
|
|
|
|
static const int kernel[3][3] =
|
|
{
|
|
{ 0, -1, 0 },
|
|
{ -1, 8, -1 },
|
|
{ 0, -1, 0 }
|
|
};
|
|
|
|
for (uint32_t y = 0; y < 4; y++)
|
|
{
|
|
for (uint32_t x = 0; x < 4; x++)
|
|
{
|
|
// ABC
|
|
// D F
|
|
// GHI
|
|
|
|
int sum = 0;
|
|
|
|
for (int yd = -1; yd <= 1; yd++)
|
|
{
|
|
int fy = y + yd;
|
|
fy = basisu::clamp<int>(fy, 0, 3);
|
|
|
|
for (int xd = -1; xd <= 1; xd++)
|
|
{
|
|
int fx = x + xd;
|
|
fx = basisu::clamp<int>(fx, 0, 3);
|
|
|
|
int k = (*this)(fx, fy);
|
|
sum += k * kernel[yd + 1][xd + 1];
|
|
}
|
|
}
|
|
|
|
sum = sum / 4;
|
|
|
|
result(x, y) = static_cast<uint8_t>(basisu::clamp<int>(sum, 0, 3));
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
etc1_selector_palette_entry get_flipped_and_rotated(bool flip, uint32_t rotation_index) const
|
|
{
|
|
etc1_selector_palette_entry temp;
|
|
|
|
if (flip)
|
|
{
|
|
for (uint32_t y = 0; y < 4; y++)
|
|
for (uint32_t x = 0; x < 4; x++)
|
|
temp(x, y) = (*this)(x, 3 - y);
|
|
}
|
|
else
|
|
{
|
|
temp = *this;
|
|
}
|
|
|
|
etc1_selector_palette_entry result;
|
|
|
|
switch (rotation_index)
|
|
{
|
|
case 0:
|
|
result = temp;
|
|
break;
|
|
case 1:
|
|
for (uint32_t y = 0; y < 4; y++)
|
|
for (uint32_t x = 0; x < 4; x++)
|
|
result(x, y) = temp(y, 3 - x);
|
|
break;
|
|
case 2:
|
|
for (uint32_t y = 0; y < 4; y++)
|
|
for (uint32_t x = 0; x < 4; x++)
|
|
result(x, y) = temp(3 - x, 3 - y);
|
|
break;
|
|
case 3:
|
|
for (uint32_t y = 0; y < 4; y++)
|
|
for (uint32_t x = 0; x < 4; x++)
|
|
result(x, y) = temp(3 - y, x);
|
|
break;
|
|
default:
|
|
assert(0);
|
|
break;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
etc1_selector_palette_entry get_modified(const etc1_global_palette_entry_modifier &modifier) const
|
|
{
|
|
etc1_selector_palette_entry r(*this);
|
|
|
|
if (modifier.m_shift_x)
|
|
r = r.get_shift_x();
|
|
|
|
if (modifier.m_shift_y)
|
|
r = r.get_shift_y();
|
|
|
|
r = r.get_flipped_and_rotated(modifier.m_flip != 0, modifier.m_rot);
|
|
|
|
if (modifier.m_dilate)
|
|
r = r.get_dilated();
|
|
|
|
if (modifier.m_erode)
|
|
r = r.get_eroded();
|
|
|
|
if (modifier.m_high_pass)
|
|
r = r.get_high_pass();
|
|
|
|
if (modifier.m_rand)
|
|
r = r.get_randomized();
|
|
|
|
if (modifier.m_div)
|
|
r = r.get_divided();
|
|
|
|
if (modifier.m_shift)
|
|
r = r.get_shifted(1);
|
|
|
|
if (modifier.m_contrast)
|
|
r = r.get_contrast(modifier.m_contrast);
|
|
|
|
if (modifier.m_inv)
|
|
r = r.get_inverted();
|
|
|
|
if (modifier.m_median)
|
|
r = r.get_median();
|
|
|
|
return r;
|
|
}
|
|
|
|
etc1_selector_palette_entry apply_modifier(modifier_types mod_type, const etc1_global_palette_entry_modifier &modifier) const
|
|
{
|
|
switch (mod_type)
|
|
{
|
|
case cModifierContrast:
|
|
return get_contrast(modifier.m_contrast);
|
|
case cModifierRand:
|
|
return get_randomized();
|
|
case cModifierMedian:
|
|
return get_median();
|
|
case cModifierDiv:
|
|
return get_divided();
|
|
case cModifierShift:
|
|
return get_shifted(1);
|
|
case cModifierInv:
|
|
return get_inverted();
|
|
case cModifierFlippedAndRotated:
|
|
return get_flipped_and_rotated(modifier.m_flip != 0, modifier.m_rot);
|
|
case cModifierDilate:
|
|
return get_dilated();
|
|
case cModifierShiftX:
|
|
return get_shift_x();
|
|
case cModifierShiftY:
|
|
return get_shift_y();
|
|
case cModifierErode:
|
|
return get_eroded();
|
|
case cModifierHighPass:
|
|
return get_high_pass();
|
|
default:
|
|
assert(0);
|
|
break;
|
|
}
|
|
|
|
return *this;
|
|
}
|
|
|
|
etc1_selector_palette_entry get_modified(const etc1_global_palette_entry_modifier &modifier, uint32_t num_order, const modifier_types *pOrder) const
|
|
{
|
|
etc1_selector_palette_entry r(*this);
|
|
|
|
for (uint32_t i = 0; i < num_order; i++)
|
|
{
|
|
r = r.apply_modifier(pOrder[i], modifier);
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
bool operator< (const etc1_selector_palette_entry &other) const
|
|
{
|
|
for (uint32_t i = 0; i < 16; i++)
|
|
{
|
|
if (m_selectors[i] < other.m_selectors[i])
|
|
return true;
|
|
else if (m_selectors[i] != other.m_selectors[i])
|
|
return false;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool operator== (const etc1_selector_palette_entry &other) const
|
|
{
|
|
for (uint32_t i = 0; i < 16; i++)
|
|
{
|
|
if (m_selectors[i] != other.m_selectors[i])
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
private:
|
|
uint8_t m_selectors[16];
|
|
};
|
|
|
|
typedef std::vector<etc1_selector_palette_entry> etc1_selector_palette_entry_vec;
|
|
|
|
extern const uint32_t g_global_selector_cb[];
|
|
extern const uint32_t g_global_selector_cb_size;
|
|
|
|
#define ETC1_GLOBAL_SELECTOR_CODEBOOK_MAX_PAL_BITS (12)
|
|
|
|
struct etc1_global_selector_codebook_entry_id
|
|
{
|
|
uint32_t m_palette_index;
|
|
etc1_global_palette_entry_modifier m_modifier;
|
|
|
|
etc1_global_selector_codebook_entry_id(uint32_t palette_index, const etc1_global_palette_entry_modifier &modifier) : m_palette_index(palette_index), m_modifier(modifier) { }
|
|
|
|
etc1_global_selector_codebook_entry_id() { }
|
|
|
|
void set(uint32_t palette_index, const etc1_global_palette_entry_modifier &modifier) { m_palette_index = palette_index; m_modifier = modifier; }
|
|
};
|
|
|
|
typedef std::vector<etc1_global_selector_codebook_entry_id> etc1_global_selector_codebook_entry_id_vec;
|
|
|
|
class etc1_global_selector_codebook
|
|
{
|
|
public:
|
|
etc1_global_selector_codebook() { }
|
|
etc1_global_selector_codebook(uint32_t N, const uint32_t *pEntries) { init(N, pEntries); }
|
|
|
|
void init(uint32_t N, const uint32_t* pEntries);
|
|
|
|
void print_code(FILE *pFile);
|
|
|
|
void clear()
|
|
{
|
|
m_palette.clear();
|
|
}
|
|
|
|
uint32_t size() const { return (uint32_t)m_palette.size(); }
|
|
|
|
const etc1_selector_palette_entry_vec &get_palette() const
|
|
{
|
|
return m_palette;
|
|
}
|
|
|
|
etc1_selector_palette_entry get_entry(uint32_t palette_index) const
|
|
{
|
|
return m_palette[palette_index];
|
|
}
|
|
|
|
etc1_selector_palette_entry get_entry(uint32_t palette_index, const etc1_global_palette_entry_modifier &modifier) const
|
|
{
|
|
return m_palette[palette_index].get_modified(modifier);
|
|
}
|
|
|
|
etc1_selector_palette_entry get_entry(const etc1_global_selector_codebook_entry_id &id) const
|
|
{
|
|
return m_palette[id.m_palette_index].get_modified(id.m_modifier);
|
|
}
|
|
|
|
etc1_selector_palette_entry_vec m_palette;
|
|
};
|
|
|
|
} // namespace basist
|