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bc7e.ispc
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// bc7e.ispc - Fast high quality SIMD BC7 encoder
// Copyright (C) 2018-2020 Binomial LLC, All rights reserved. Apache 2.0 license - see LICENSE.
// Typically compiled as: ispc -g -O2 "%(Filename).ispc" -o "$(TargetDir)%(Filename).obj" -h "$(ProjectDir)%(Filename)_ispc.h" --target=sse2,sse4,avx,avx2 --opt=fast-math --opt=disable-assertions
// --opt=fast-math is optional (doesn't make much if any measurable difference).
#define BC7E_2SUBSET_CHECKERBOARD_PARTITION_INDEX (34)
#define BC7E_BLOCK_SIZE (16)
#define BC7E_MAX_PARTITIONS0 (16)
#define BC7E_MAX_PARTITIONS1 (64)
#define BC7E_MAX_PARTITIONS2 (64)
#define BC7E_MAX_PARTITIONS3 (64)
#define BC7E_MAX_PARTITIONS7 (64)
#define BC7E_MAX_UBER_LEVEL (4)
typedef unsigned int8 uint8_t;
typedef unsigned int64 uint16_t;
typedef unsigned int32 uint32_t;
typedef unsigned int64 uint64_t;
typedef int8 int8_t;
typedef int int32_t;
typedef int64 int64_t;
#ifndef UINT16_MAX
#define UINT16_MAX (0xFFFF)
#endif
#ifndef UINT_MAX
#define UINT_MAX (0xFFFFFFFFU)
#endif
#ifndef UINT64_MAX
#define UINT64_MAX (0xFFFFFFFFFFFFFFFFULL)
#endif
#ifndef INT64_MAX
#define INT64_MAX (0x7FFFFFFFFFFFFFFFULL)
#endif
struct bc7e_compress_block_params
{
uint32_t m_max_partitions_mode[8];
uint32_t m_weights[4];
uint32_t m_uber_level;
uint32_t m_refinement_passes;
uint32_t m_mode4_rotation_mask;
uint32_t m_mode4_index_mask;
uint32_t m_mode5_rotation_mask;
uint32_t m_uber1_mask;
bool m_perceptual;
bool m_pbit_search;
bool m_mode6_only;
bool m_unused0;
struct
{
uint32_t m_max_mode13_partitions_to_try;
uint32_t m_max_mode0_partitions_to_try;
uint32_t m_max_mode2_partitions_to_try;
bool m_use_mode[7];
bool m_unused1;
} m_opaque_settings;
struct
{
uint32_t m_max_mode7_partitions_to_try;
uint32_t m_mode67_error_weight_mul[4];
bool m_use_mode4;
bool m_use_mode5;
bool m_use_mode6;
bool m_use_mode7;
bool m_use_mode4_rotation;
bool m_use_mode5_rotation;
bool m_unused2;
bool m_unused3;
} m_alpha_settings;
};
static inline uniform int32_t clampi(uniform int32_t value, uniform int32_t low, uniform int32_t high) { return clamp(value, low, high); }
static inline uniform uint32_t clampu(uniform uint32_t value, uniform uint32_t low, uniform uint32_t high) { return clamp(value, low, high); }
static inline uniform float clampf(uniform float value, uniform float low, uniform float high) { return clamp(value, low, high); }
static inline int32_t clampi(int32_t value, int32_t low, int32_t high) { return clamp(value, low, high); }
static inline uint32_t clampu(uint32_t value, uint32_t low, uint32_t high) { return clamp(value, low, high); }
static inline float clampf(float value, float low, float high) { return clamp(value, low, high); }
static inline uniform float saturate(uniform float value) { return clampf(value, 0, 1.0f); }
static inline uniform float saturate255(uniform float value) { return clampf(value, 0, 255.0f); }
static inline float saturate(float value) { return clampf(value, 0, 1.0f); }
static inline float saturate255(float value) { return clampf(value, 0, 255.0f); }
static inline uniform uint8_t minimumub(uniform uint8_t a, uniform uint8_t b) { return min(a, b); }
static inline uniform int32_t minimumi(uniform int32_t a, uniform int32_t b) { return min(a, b); }
static inline uniform uint32_t minimumu(uniform uint32_t a, uniform uint32_t b) { return min(a, b); }
static inline uniform uint64_t minimumu64(uniform uint64_t a, uniform uint64_t b) { return min(a, b); }
static inline uniform float minimumf(uniform float a, uniform float b) { return min(a, b); }
static inline uniform uint8_t maximumub(uniform uint8_t a, uniform uint8_t b) { return max(a, b); }
static inline uniform int32_t maximumi(uniform int32_t a, uniform int32_t b) { return max(a, b); }
static inline uniform uint32_t maximumu(uniform uint32_t a, uniform uint32_t b) { return max(a, b); }
static inline uniform float maximumf(uniform float a, uniform float b) { return max(a, b); }
static inline uint8_t minimumub(uint8_t a, uint8_t b) { return min(a, b); }
static inline int32_t minimumi(int32_t a, int32_t b) { return min(a, b); }
static inline uint32_t minimumu(uint32_t a, uint32_t b) { return min(a, b); }
static inline uint64_t minimumu64(uint64_t a, uint64_t b) { return min(a, b); }
static inline float minimumf(float a, float b) { return min(a, b); }
static inline uint8_t maximumub(uint8_t a, uint8_t b) { return max(a, b); }
static inline int32_t maximumi(int32_t a, int32_t b) { return max(a, b); }
static inline uint32_t maximumu(uint32_t a, uint32_t b) { return max(a, b); }
static inline float maximumf(float a, float b) { return max(a, b); }
static inline uniform int32_t iabs32(uniform int32_t v) { uniform uint32_t msk = v >> 31; return (v ^ msk) - msk; }
static inline int32_t iabs32(int32_t v) { uint32_t msk = v >> 31; return (v ^ msk) - msk; }
static inline void swapub(uniform uint8_t * uniform a, uniform uint8_t * uniform b) { uniform uint8_t t = *a; *a = *b; *b = t; }
static inline void swapu(uniform uint32_t * uniform a, uniform uint32_t * uniform b) { uniform uint32_t t = *a; *a = *b; *b = t; }
static inline void swapi(uniform int32_t * uniform a, uniform int32_t * uniform b) { uniform int32_t t = *a; *a = *b; *b = t; }
static inline void swapf(uniform float * uniform a, uniform float * uniform b) { uniform float t = *a; *a = *b; *b = t; }
static inline void swapub(varying uint8_t *uniform a, varying uint8_t *uniform b) { uint8_t t = *a; *a = *b; *b = t; }
static inline void swapi(varying int32_t *uniform a, varying int32_t *uniform b) { int32_t t = *a; *a = *b; *b = t; }
static inline void swapu(varying uint32_t *uniform a, varying uint32_t *uniform b) { uint32_t t = *a; *a = *b; *b = t; }
static inline void swapf(varying float *uniform a, varying float *uniform b) { float t = *a; *a = *b; *b = t; }
static inline float square(float s) { return s * s; }
static inline int square(int s) { return s * s; }
struct color_quad_u8
{
uint8_t m_c[4];
};
struct color_quad_i
{
int32_t m_c[4];
};
struct color_quad_f
{
float m_c[4];
};
static inline color_quad_i component_min_rgb(const varying color_quad_i * uniform pA, const varying color_quad_i * uniform pB)
{
color_quad_i res;
res.m_c[0] = minimumi(pA->m_c[0], pB->m_c[0]);
res.m_c[1] = minimumi(pA->m_c[1], pB->m_c[1]);
res.m_c[2] = minimumi(pA->m_c[2], pB->m_c[2]);
res.m_c[3] = 255;
return res;
}
static inline color_quad_i component_max_rgb(const varying color_quad_i * uniform pA, const varying color_quad_i * uniform pB)
{
color_quad_i res;
res.m_c[0] = maximumi(pA->m_c[0], pB->m_c[0]);
res.m_c[1] = maximumi(pA->m_c[1], pB->m_c[1]);
res.m_c[2] = maximumi(pA->m_c[2], pB->m_c[2]);
res.m_c[3] = 255;
return res;
}
static inline varying color_quad_i *color_quad_i_set_clamped(varying color_quad_i * uniform pRes, varying int32_t r, varying int32_t g, varying int32_t b, varying int32_t a)
{
pRes->m_c[0] = clampi(r, 0, 255);
pRes->m_c[1] = clampi(g, 0, 255);
pRes->m_c[2] = clampi(b, 0, 255);
pRes->m_c[3] = clampi(a, 0, 255);
return pRes;
}
static inline varying color_quad_i *color_quad_i_set(varying color_quad_i * uniform pRes, varying int32_t r, varying int32_t g, varying int32_t b, varying int32_t a)
{
pRes->m_c[0] = r;
pRes->m_c[1] = g;
pRes->m_c[2] = b;
pRes->m_c[3] = a;
return pRes;
}
static inline varying color_quad_i *color_quad_i_set(varying color_quad_i * uniform pRes, uniform int32_t r, uniform int32_t g, uniform int32_t b, uniform int32_t a)
{
pRes->m_c[0] = r;
pRes->m_c[1] = g;
pRes->m_c[2] = b;
pRes->m_c[3] = a;
return pRes;
}
static inline bool color_quad_i_equals(const varying color_quad_i * uniform pLHS, const varying color_quad_i * uniform pRHS)
{
return (pLHS->m_c[0] == pRHS->m_c[0]) && (pLHS->m_c[1] == pRHS->m_c[1]) && (pLHS->m_c[2] == pRHS->m_c[2]) && (pLHS->m_c[3] == pRHS->m_c[3]);
}
static inline bool color_quad_i_notequals(const varying color_quad_i * uniform pLHS, const varying color_quad_i * uniform pRHS)
{
return !color_quad_i_equals(pLHS, pRHS);
}
struct vec4F
{
float m_c[4];
};
static inline varying vec4F * uniform vec4F_set_scalar(varying vec4F * uniform pV, float x)
{
pV->m_c[0] = x;
pV->m_c[1] = x;
pV->m_c[2] = x;
pV->m_c[3] = x;
return pV;
}
static inline varying vec4F * uniform vec4F_set(varying vec4F * uniform pV, float x, float y, float z, float w)
{
pV->m_c[0] = x;
pV->m_c[1] = y;
pV->m_c[2] = z;
pV->m_c[3] = w;
return pV;
}
static inline varying vec4F * uniform vec4F_saturate_in_place(varying vec4F * uniform pV)
{
pV->m_c[0] = saturate(pV->m_c[0]);
pV->m_c[1] = saturate(pV->m_c[1]);
pV->m_c[2] = saturate(pV->m_c[2]);
pV->m_c[3] = saturate(pV->m_c[3]);
return pV;
}
static inline vec4F vec4F_saturate(const varying vec4F * uniform pV)
{
vec4F res;
res.m_c[0] = saturate(pV->m_c[0]);
res.m_c[1] = saturate(pV->m_c[1]);
res.m_c[2] = saturate(pV->m_c[2]);
res.m_c[3] = saturate(pV->m_c[3]);
return res;
}
static inline vec4F vec4F_from_color(const varying color_quad_i * uniform pC)
{
vec4F res;
vec4F_set(&res, pC->m_c[0], pC->m_c[1], pC->m_c[2], pC->m_c[3]);
return res;
}
static inline vec4F vec4F_add(const varying vec4F * uniform pLHS, const varying vec4F * uniform pRHS)
{
vec4F res;
vec4F_set(&res, pLHS->m_c[0] + pRHS->m_c[0], pLHS->m_c[1] + pRHS->m_c[1], pLHS->m_c[2] + pRHS->m_c[2], pLHS->m_c[3] + pRHS->m_c[3]);
return res;
}
static inline vec4F vec4F_sub(const varying vec4F * uniform pLHS, const varying vec4F *uniform pRHS)
{
vec4F res;
vec4F_set(&res, pLHS->m_c[0] - pRHS->m_c[0], pLHS->m_c[1] - pRHS->m_c[1], pLHS->m_c[2] - pRHS->m_c[2], pLHS->m_c[3] - pRHS->m_c[3]);
return res;
}
static inline float vec4F_dot(const varying vec4F * uniform pLHS, const varying vec4F * uniform pRHS)
{
return pLHS->m_c[0] * pRHS->m_c[0] + pLHS->m_c[1] * pRHS->m_c[1] + pLHS->m_c[2] * pRHS->m_c[2] + pLHS->m_c[3] * pRHS->m_c[3];
}
static inline vec4F vec4F_mul(const varying vec4F * uniform pLHS, float s)
{
vec4F res;
vec4F_set(&res, pLHS->m_c[0] * s, pLHS->m_c[1] * s, pLHS->m_c[2] * s, pLHS->m_c[3] * s);
return res;
}
static inline varying vec4F *vec4F_normalize_in_place(varying vec4F * uniform pV)
{
float s = pV->m_c[0] * pV->m_c[0] + pV->m_c[1] * pV->m_c[1] + pV->m_c[2] * pV->m_c[2] + pV->m_c[3] * pV->m_c[3];
if (s != 0.0f)
{
s = 1.0f / sqrt(s);
pV->m_c[0] *= s;
pV->m_c[1] *= s;
pV->m_c[2] *= s;
pV->m_c[3] *= s;
}
return pV;
}
static const uniform uint32_t g_bc7_weights2[4] = { 0, 21, 43, 64 };
static const uniform uint32_t g_bc7_weights3[8] = { 0, 9, 18, 27, 37, 46, 55, 64 };
static const uniform uint32_t g_bc7_weights4[16] = { 0, 4, 9, 13, 17, 21, 26, 30, 34, 38, 43, 47, 51, 55, 60, 64 };
// Precomputed weight constants used during least fit determination. For each entry in g_bc7_weights[]: w * w, (1.0f - w) * w, (1.0f - w) * (1.0f - w), w
static const uniform float g_bc7_weights2x[4 * 4] = { 0.000000f, 0.000000f, 1.000000f, 0.000000f, 0.107666f, 0.220459f, 0.451416f, 0.328125f, 0.451416f, 0.220459f, 0.107666f, 0.671875f, 1.000000f, 0.000000f, 0.000000f, 1.000000f };
static const uniform float g_bc7_weights3x[8 * 4] = { 0.000000f, 0.000000f, 1.000000f, 0.000000f, 0.019775f, 0.120850f, 0.738525f, 0.140625f, 0.079102f, 0.202148f, 0.516602f, 0.281250f, 0.177979f, 0.243896f, 0.334229f, 0.421875f, 0.334229f, 0.243896f, 0.177979f, 0.578125f, 0.516602f, 0.202148f,
0.079102f, 0.718750f, 0.738525f, 0.120850f, 0.019775f, 0.859375f, 1.000000f, 0.000000f, 0.000000f, 1.000000f };
static const uniform float g_bc7_weights4x[16 * 4] = { 0.000000f, 0.000000f, 1.000000f, 0.000000f, 0.003906f, 0.058594f, 0.878906f, 0.062500f, 0.019775f, 0.120850f, 0.738525f, 0.140625f, 0.041260f, 0.161865f, 0.635010f, 0.203125f, 0.070557f, 0.195068f, 0.539307f, 0.265625f, 0.107666f, 0.220459f,
0.451416f, 0.328125f, 0.165039f, 0.241211f, 0.352539f, 0.406250f, 0.219727f, 0.249023f, 0.282227f, 0.468750f, 0.282227f, 0.249023f, 0.219727f, 0.531250f, 0.352539f, 0.241211f, 0.165039f, 0.593750f, 0.451416f, 0.220459f, 0.107666f, 0.671875f, 0.539307f, 0.195068f, 0.070557f, 0.734375f,
0.635010f, 0.161865f, 0.041260f, 0.796875f, 0.738525f, 0.120850f, 0.019775f, 0.859375f, 0.878906f, 0.058594f, 0.003906f, 0.937500f, 1.000000f, 0.000000f, 0.000000f, 1.000000f };
static const uniform int g_bc7_partition1[16] = { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 };
static const uniform int g_bc7_partition2[64 * 16] =
{
0,0,1,1,0,0,1,1,0,0,1,1,0,0,1,1, 0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,1, 0,1,1,1,0,1,1,1,0,1,1,1,0,1,1,1, 0,0,0,1,0,0,1,1,0,0,1,1,0,1,1,1, 0,0,0,0,0,0,0,1,0,0,0,1,0,0,1,1, 0,0,1,1,0,1,1,1,0,1,1,1,1,1,1,1, 0,0,0,1,0,0,1,1,0,1,1,1,1,1,1,1, 0,0,0,0,0,0,0,1,0,0,1,1,0,1,1,1,
0,0,0,0,0,0,0,0,0,0,0,1,0,0,1,1, 0,0,1,1,0,1,1,1,1,1,1,1,1,1,1,1, 0,0,0,0,0,0,0,1,0,1,1,1,1,1,1,1, 0,0,0,0,0,0,0,0,0,0,0,1,0,1,1,1, 0,0,0,1,0,1,1,1,1,1,1,1,1,1,1,1, 0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1, 0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1, 0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,
0,0,0,0,1,0,0,0,1,1,1,0,1,1,1,1, 0,1,1,1,0,0,0,1,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,1,0,0,0,1,1,1,0, 0,1,1,1,0,0,1,1,0,0,0,1,0,0,0,0, 0,0,1,1,0,0,0,1,0,0,0,0,0,0,0,0, 0,0,0,0,1,0,0,0,1,1,0,0,1,1,1,0, 0,0,0,0,0,0,0,0,1,0,0,0,1,1,0,0, 0,1,1,1,0,0,1,1,0,0,1,1,0,0,0,1,
0,0,1,1,0,0,0,1,0,0,0,1,0,0,0,0, 0,0,0,0,1,0,0,0,1,0,0,0,1,1,0,0, 0,1,1,0,0,1,1,0,0,1,1,0,0,1,1,0, 0,0,1,1,0,1,1,0,0,1,1,0,1,1,0,0, 0,0,0,1,0,1,1,1,1,1,1,0,1,0,0,0, 0,0,0,0,1,1,1,1,1,1,1,1,0,0,0,0, 0,1,1,1,0,0,0,1,1,0,0,0,1,1,1,0, 0,0,1,1,1,0,0,1,1,0,0,1,1,1,0,0,
0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1, 0,0,0,0,1,1,1,1,0,0,0,0,1,1,1,1, 0,1,0,1,1,0,1,0,0,1,0,1,1,0,1,0, 0,0,1,1,0,0,1,1,1,1,0,0,1,1,0,0, 0,0,1,1,1,1,0,0,0,0,1,1,1,1,0,0, 0,1,0,1,0,1,0,1,1,0,1,0,1,0,1,0, 0,1,1,0,1,0,0,1,0,1,1,0,1,0,0,1, 0,1,0,1,1,0,1,0,1,0,1,0,0,1,0,1,
0,1,1,1,0,0,1,1,1,1,0,0,1,1,1,0, 0,0,0,1,0,0,1,1,1,1,0,0,1,0,0,0, 0,0,1,1,0,0,1,0,0,1,0,0,1,1,0,0, 0,0,1,1,1,0,1,1,1,1,0,1,1,1,0,0, 0,1,1,0,1,0,0,1,1,0,0,1,0,1,1,0, 0,0,1,1,1,1,0,0,1,1,0,0,0,0,1,1, 0,1,1,0,0,1,1,0,1,0,0,1,1,0,0,1, 0,0,0,0,0,1,1,0,0,1,1,0,0,0,0,0,
0,1,0,0,1,1,1,0,0,1,0,0,0,0,0,0, 0,0,1,0,0,1,1,1,0,0,1,0,0,0,0,0, 0,0,0,0,0,0,1,0,0,1,1,1,0,0,1,0, 0,0,0,0,0,1,0,0,1,1,1,0,0,1,0,0, 0,1,1,0,1,1,0,0,1,0,0,1,0,0,1,1, 0,0,1,1,0,1,1,0,1,1,0,0,1,0,0,1, 0,1,1,0,0,0,1,1,1,0,0,1,1,1,0,0, 0,0,1,1,1,0,0,1,1,1,0,0,0,1,1,0,
0,1,1,0,1,1,0,0,1,1,0,0,1,0,0,1, 0,1,1,0,0,0,1,1,0,0,1,1,1,0,0,1, 0,1,1,1,1,1,1,0,1,0,0,0,0,0,0,1, 0,0,0,1,1,0,0,0,1,1,1,0,0,1,1,1, 0,0,0,0,1,1,1,1,0,0,1,1,0,0,1,1, 0,0,1,1,0,0,1,1,1,1,1,1,0,0,0,0, 0,0,1,0,0,0,1,0,1,1,1,0,1,1,1,0, 0,1,0,0,0,1,0,0,0,1,1,1,0,1,1,1
};
static const uniform int g_bc7_table_anchor_index_second_subset[64] =
{
15,15,15,15,15,15,15,15, 15,15,15,15,15,15,15,15, 15, 2, 8, 2, 2, 8, 8,15, 2, 8, 2, 2, 8, 8, 2, 2, 15,15, 6, 8, 2, 8,15,15, 2, 8, 2, 2, 2,15,15, 6, 6, 2, 6, 8,15,15, 2, 2, 15,15,15,15,15, 2, 2,15
};
static const uniform int g_bc7_partition3[64 * 16] =
{
0,0,1,1,0,0,1,1,0,2,2,1,2,2,2,2, 0,0,0,1,0,0,1,1,2,2,1,1,2,2,2,1, 0,0,0,0,2,0,0,1,2,2,1,1,2,2,1,1, 0,2,2,2,0,0,2,2,0,0,1,1,0,1,1,1, 0,0,0,0,0,0,0,0,1,1,2,2,1,1,2,2, 0,0,1,1,0,0,1,1,0,0,2,2,0,0,2,2, 0,0,2,2,0,0,2,2,1,1,1,1,1,1,1,1, 0,0,1,1,0,0,1,1,2,2,1,1,2,2,1,1,
0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2, 0,0,0,0,1,1,1,1,1,1,1,1,2,2,2,2, 0,0,0,0,1,1,1,1,2,2,2,2,2,2,2,2, 0,0,1,2,0,0,1,2,0,0,1,2,0,0,1,2, 0,1,1,2,0,1,1,2,0,1,1,2,0,1,1,2, 0,1,2,2,0,1,2,2,0,1,2,2,0,1,2,2, 0,0,1,1,0,1,1,2,1,1,2,2,1,2,2,2, 0,0,1,1,2,0,0,1,2,2,0,0,2,2,2,0,
0,0,0,1,0,0,1,1,0,1,1,2,1,1,2,2, 0,1,1,1,0,0,1,1,2,0,0,1,2,2,0,0, 0,0,0,0,1,1,2,2,1,1,2,2,1,1,2,2, 0,0,2,2,0,0,2,2,0,0,2,2,1,1,1,1, 0,1,1,1,0,1,1,1,0,2,2,2,0,2,2,2, 0,0,0,1,0,0,0,1,2,2,2,1,2,2,2,1, 0,0,0,0,0,0,1,1,0,1,2,2,0,1,2,2, 0,0,0,0,1,1,0,0,2,2,1,0,2,2,1,0,
0,1,2,2,0,1,2,2,0,0,1,1,0,0,0,0, 0,0,1,2,0,0,1,2,1,1,2,2,2,2,2,2, 0,1,1,0,1,2,2,1,1,2,2,1,0,1,1,0, 0,0,0,0,0,1,1,0,1,2,2,1,1,2,2,1, 0,0,2,2,1,1,0,2,1,1,0,2,0,0,2,2, 0,1,1,0,0,1,1,0,2,0,0,2,2,2,2,2, 0,0,1,1,0,1,2,2,0,1,2,2,0,0,1,1, 0,0,0,0,2,0,0,0,2,2,1,1,2,2,2,1,
0,0,0,0,0,0,0,2,1,1,2,2,1,2,2,2, 0,2,2,2,0,0,2,2,0,0,1,2,0,0,1,1, 0,0,1,1,0,0,1,2,0,0,2,2,0,2,2,2, 0,1,2,0,0,1,2,0,0,1,2,0,0,1,2,0, 0,0,0,0,1,1,1,1,2,2,2,2,0,0,0,0, 0,1,2,0,1,2,0,1,2,0,1,2,0,1,2,0, 0,1,2,0,2,0,1,2,1,2,0,1,0,1,2,0, 0,0,1,1,2,2,0,0,1,1,2,2,0,0,1,1,
0,0,1,1,1,1,2,2,2,2,0,0,0,0,1,1, 0,1,0,1,0,1,0,1,2,2,2,2,2,2,2,2, 0,0,0,0,0,0,0,0,2,1,2,1,2,1,2,1, 0,0,2,2,1,1,2,2,0,0,2,2,1,1,2,2, 0,0,2,2,0,0,1,1,0,0,2,2,0,0,1,1, 0,2,2,0,1,2,2,1,0,2,2,0,1,2,2,1, 0,1,0,1,2,2,2,2,2,2,2,2,0,1,0,1, 0,0,0,0,2,1,2,1,2,1,2,1,2,1,2,1,
0,1,0,1,0,1,0,1,0,1,0,1,2,2,2,2, 0,2,2,2,0,1,1,1,0,2,2,2,0,1,1,1, 0,0,0,2,1,1,1,2,0,0,0,2,1,1,1,2, 0,0,0,0,2,1,1,2,2,1,1,2,2,1,1,2, 0,2,2,2,0,1,1,1,0,1,1,1,0,2,2,2, 0,0,0,2,1,1,1,2,1,1,1,2,0,0,0,2, 0,1,1,0,0,1,1,0,0,1,1,0,2,2,2,2, 0,0,0,0,0,0,0,0,2,1,1,2,2,1,1,2,
0,1,1,0,0,1,1,0,2,2,2,2,2,2,2,2, 0,0,2,2,0,0,1,1,0,0,1,1,0,0,2,2, 0,0,2,2,1,1,2,2,1,1,2,2,0,0,2,2, 0,0,0,0,0,0,0,0,0,0,0,0,2,1,1,2, 0,0,0,2,0,0,0,1,0,0,0,2,0,0,0,1, 0,2,2,2,1,2,2,2,0,2,2,2,1,2,2,2, 0,1,0,1,2,2,2,2,2,2,2,2,2,2,2,2, 0,1,1,1,2,0,1,1,2,2,0,1,2,2,2,0,
};
static const uniform int g_bc7_table_anchor_index_third_subset_1[64] =
{
3, 3,15,15, 8, 3,15,15, 8, 8, 6, 6, 6, 5, 3, 3, 3, 3, 8,15, 3, 3, 6,10, 5, 8, 8, 6, 8, 5,15,15, 8,15, 3, 5, 6,10, 8,15, 15, 3,15, 5,15,15,15,15, 3,15, 5, 5, 5, 8, 5,10, 5,10, 8,13,15,12, 3, 3
};
static const uniform int g_bc7_table_anchor_index_third_subset_2[64] =
{
15, 8, 8, 3,15,15, 3, 8, 15,15,15,15,15,15,15, 8, 15, 8,15, 3,15, 8,15, 8, 3,15, 6,10,15,15,10, 8, 15, 3,15,10,10, 8, 9,10, 6,15, 8,15, 3, 6, 6, 8, 15, 3,15,15,15,15,15,15, 15,15,15,15, 3,15,15, 8
};
static const uniform int g_bc7_num_subsets[8] = { 3, 2, 3, 2, 1, 1, 1, 2 };
static const uniform int g_bc7_partition_bits[8] = { 4, 6, 6, 6, 0, 0, 0, 6 };
static const uniform int g_bc7_rotation_bits[8] = { 0, 0, 0, 0, 2, 2, 0, 0 };
static const uniform int g_bc7_color_index_bitcount[8] = { 3, 3, 2, 2, 2, 2, 4, 2 };
static int uniform get_bc7_color_index_size(uniform int mode, uniform int index_selection_bit) { return g_bc7_color_index_bitcount[mode] + index_selection_bit; }
#pragma ignore warning(perf)
static int varying get_bc7_color_index_size(varying int mode, varying int index_selection_bit) { return g_bc7_color_index_bitcount[mode] + index_selection_bit; }
static uniform int g_bc7_alpha_index_bitcount[8] = { 0, 0, 0, 0, 3, 2, 4, 2 };
static uniform int get_bc7_alpha_index_size(uniform int mode, uniform int index_selection_bit) { return g_bc7_alpha_index_bitcount[mode] - index_selection_bit; }
#pragma ignore warning(perf)
static varying int get_bc7_alpha_index_size(varying int mode, varying int index_selection_bit) { return g_bc7_alpha_index_bitcount[mode] - index_selection_bit; }
static const uniform int g_bc7_mode_has_p_bits[8] = { 1, 1, 0, 1, 0, 0, 1, 1 };
static const uniform int g_bc7_mode_has_shared_p_bits[8] = { 0, 1, 0, 0, 0, 0, 0, 0 };
static const uniform int g_bc7_color_precision_table[8] = { 4, 6, 5, 7, 5, 7, 7, 5 };
static const uniform int g_bc7_color_precision_plus_pbit_table[8] = { 5, 7, 5, 8, 5, 7, 8, 6 };
static const uniform int g_bc7_alpha_precision_table[8] = { 0, 0, 0, 0, 6, 8, 7, 5 };
static const uniform int g_bc7_alpha_precision_plus_pbit_table[8] = { 0, 0, 0, 0, 6, 8, 8, 6 };
static uniform bool get_bc7_mode_has_seperate_alpha_selectors(uniform int mode) { return (mode == 4) || (mode == 5); }
static varying bool get_bc7_mode_has_seperate_alpha_selectors(varying int mode) { return (mode == 4) || (mode == 5); }
struct endpoint_err
{
uint16_t m_error;
uint8_t m_lo;
uint8_t m_hi;
};
static uniform endpoint_err g_bc7_mode_1_optimal_endpoints[256][2]; // [c][pbit]
const uniform uint32_t BC7E_MODE_1_OPTIMAL_INDEX = 2;
static uniform endpoint_err g_bc7_mode_7_optimal_endpoints[256][2][2]; // [c][pbit][hp][lp]
const uniform uint32_t BC7E_MODE_7_OPTIMAL_INDEX = 1;
static uniform endpoint_err g_bc7_mode_6_optimal_endpoints[256][2][2]; // [c][hp][lp]
const uniform uint32_t BC7E_MODE_6_OPTIMAL_INDEX = 5;
static uniform uint32_t g_bc7_mode_4_optimal_endpoints3[256]; // [c]
static uniform uint32_t g_bc7_mode_4_optimal_endpoints2[256]; // [c]
const uniform uint32_t BC7E_MODE_4_OPTIMAL_INDEX3 = 2;
const uniform uint32_t BC7E_MODE_4_OPTIMAL_INDEX2 = 1;
static uniform endpoint_err g_bc7_mode_0_optimal_endpoints[256][2][2]; // [c][hp][lp]
const uniform uint32_t BC7E_MODE_0_OPTIMAL_INDEX = 2;
static uniform bool g_codec_initialized;
export void bc7e_compress_block_init()
{
if (g_codec_initialized)
return;
// Mode 0: 444.1
for (uniform int c = 0; c < 256; c++)
{
for (uniform uint32_t hp = 0; hp < 2; hp++)
{
for (uniform uint32_t lp = 0; lp < 2; lp++)
{
uniform endpoint_err best;
best.m_error = (uint16_t)UINT16_MAX;
for (uniform uint32_t l = 0; l < 16; l++)
{
uniform uint32_t low = ((l << 1) | lp) << 3;
low |= (low >> 5);
for (uniform uint32_t h = 0; h < 16; h++)
{
uniform uint32_t high = ((h << 1) | hp) << 3;
high |= (high >> 5);
const uniform int k = (low * (64 - g_bc7_weights3[BC7E_MODE_0_OPTIMAL_INDEX]) + high * g_bc7_weights3[BC7E_MODE_0_OPTIMAL_INDEX] + 32) >> 6;
const uniform int err = (k - c) * (k - c);
if (err < best.m_error)
{
best.m_error = (uint16_t)err;
best.m_lo = (uint8_t)l;
best.m_hi = (uint8_t)h;
}
} // h
} // l
g_bc7_mode_0_optimal_endpoints[c][hp][lp] = best;
} // lp
} // hp
} // c
// Mode 1: 666.1
for (uniform int c = 0; c < 256; c++)
{
for (uniform uint32_t lp = 0; lp < 2; lp++)
{
uniform endpoint_err best;
best.m_error = (uint16_t)UINT16_MAX;
for (uniform uint32_t l = 0; l < 64; l++)
{
uniform uint32_t low = ((l << 1) | lp) << 1;
low |= (low >> 7);
for (uniform uint32_t h = 0; h < 64; h++)
{
uniform uint32_t high = ((h << 1) | lp) << 1;
high |= (high >> 7);
const uniform int k = (low * (64 - g_bc7_weights3[BC7E_MODE_1_OPTIMAL_INDEX]) + high * g_bc7_weights3[BC7E_MODE_1_OPTIMAL_INDEX] + 32) >> 6;
const uniform int err = (k - c) * (k - c);
if (err < best.m_error)
{
best.m_error = (uint16_t)err;
best.m_lo = (uint8_t)l;
best.m_hi = (uint8_t)h;
}
} // h
} // l
g_bc7_mode_1_optimal_endpoints[c][lp] = best;
} // lp
} // c
// Mode 6: 777.1 4-bit indices
for (uniform int c = 0; c < 256; c++)
{
for (uniform uint32_t hp = 0; hp < 2; hp++)
{
for (uniform uint32_t lp = 0; lp < 2; lp++)
{
uniform endpoint_err best;
best.m_error = (uint16_t)UINT16_MAX;
for (uniform uint32_t l = 0; l < 128; l++)
{
uniform uint32_t low = (l << 1) | lp;
for (uniform uint32_t h = 0; h < 128; h++)
{
uniform uint32_t high = (h << 1) | hp;
const uniform int k = (low * (64 - g_bc7_weights4[BC7E_MODE_6_OPTIMAL_INDEX]) + high * g_bc7_weights4[BC7E_MODE_6_OPTIMAL_INDEX] + 32) >> 6;
const uniform int err = (k - c) * (k - c);
if (err < best.m_error)
{
best.m_error = (uint16_t)err;
best.m_lo = (uint8_t)l;
best.m_hi = (uint8_t)h;
}
} // h
} // l
g_bc7_mode_6_optimal_endpoints[c][hp][lp] = best;
} // lp
} // hp
} // c
//Mode 4: 555 3-bit indices
for (uniform int c = 0; c < 256; c++)
{
uniform endpoint_err best;
best.m_error = (uint16_t)UINT16_MAX;
best.m_lo = 0;
best.m_hi = 0;
for (uniform uint32_t l = 0; l < 32; l++)
{
uniform uint32_t low = l << 3;
low |= (low >> 5);
for (uniform uint32_t h = 0; h < 32; h++)
{
uniform uint32_t high = h << 3;
high |= (high >> 5);
const uniform int k = (low * (64 - g_bc7_weights3[BC7E_MODE_4_OPTIMAL_INDEX3]) + high * g_bc7_weights3[BC7E_MODE_4_OPTIMAL_INDEX3] + 32) >> 6;
const uniform int err = (k - c) * (k - c);
if (err < best.m_error)
{
best.m_error = (uint16_t)err;
best.m_lo = (uint8_t)l;
best.m_hi = (uint8_t)h;
}
} // h
} // l
g_bc7_mode_4_optimal_endpoints3[c] = (uint32_t)best.m_lo | (((uint32_t)best.m_hi) << 8);
} // c
// Mode 4: 555 2-bit indices
for (uniform int c = 0; c < 256; c++)
{
uniform endpoint_err best;
best.m_error = (uint16_t)UINT16_MAX;
best.m_lo = 0;
best.m_hi = 0;
for (uniform uint32_t l = 0; l < 32; l++)
{
uniform uint32_t low = l << 3;
low |= (low >> 5);
for (uniform uint32_t h = 0; h < 32; h++)
{
uniform uint32_t high = h << 3;
high |= (high >> 5);
const uniform int k = (low * (64 - g_bc7_weights2[BC7E_MODE_4_OPTIMAL_INDEX2]) + high * g_bc7_weights2[BC7E_MODE_4_OPTIMAL_INDEX2] + 32) >> 6;
const uniform int err = (k - c) * (k - c);
if (err < best.m_error)
{
best.m_error = (uint16_t)err;
best.m_lo = (uint8_t)l;
best.m_hi = (uint8_t)h;
}
} // h
} // l
g_bc7_mode_4_optimal_endpoints2[c] = (uint32_t)best.m_lo | (((uint32_t)best.m_hi) << 8);
} // c
// Mode 7: 555.1 2-bit indices
for (uniform int c = 0; c < 256; c++)
{
uniform endpoint_err best;
best.m_error = (uint16_t)UINT16_MAX;
best.m_lo = 0;
best.m_hi = 0;
for (uniform uint32_t hp = 0; hp < 2; hp++)
{
for (uniform uint32_t lp = 0; lp < 2; lp++)
{
for (uniform uint32_t l = 0; l < 32; l++)
{
uniform uint32_t low = ((l << 1) | lp) << 2;
low |= (low >> 6);
for (uniform uint32_t h = 0; h < 32; h++)
{
uniform uint32_t high = ((h << 1) | hp) << 2;
high |= (high >> 6);
const uniform int k = (low * (64 - g_bc7_weights2[BC7E_MODE_7_OPTIMAL_INDEX]) + high * g_bc7_weights2[BC7E_MODE_7_OPTIMAL_INDEX] + 32) >> 6;
const uniform int err = (k - c) * (k - c);
if (err < best.m_error)
{
best.m_error = (uint16_t)err;
best.m_lo = (uint8_t)l;
best.m_hi = (uint8_t)h;
}
} // h
} // l
g_bc7_mode_7_optimal_endpoints[c][hp][lp] = best;
} // hp
} // lp
} // c
g_codec_initialized = true;
}
static void compute_least_squares_endpoints_rgba(uint32_t N, const varying int *uniform pSelectors, const uniform vec4F *uniform pSelector_weights, varying vec4F *uniform pXl, varying vec4F *uniform pXh, const varying color_quad_i * uniform pColors)
{
// Least squares using normal equations: http://www.cs.cornell.edu/~bindel/class/cs3220-s12/notes/lec10.pdf
// I did this in matrix form first, expanded out all the ops, then optimized it a bit.
float z00 = 0.0f, z01 = 0.0f, z10 = 0.0f, z11 = 0.0f;
float q00_r = 0.0f, q10_r = 0.0f, t_r = 0.0f;
float q00_g = 0.0f, q10_g = 0.0f, t_g = 0.0f;
float q00_b = 0.0f, q10_b = 0.0f, t_b = 0.0f;
float q00_a = 0.0f, q10_a = 0.0f, t_a = 0.0f;
for (uniform uint32_t i = 0; i < N; i++)
{
const uint32_t sel = pSelectors[i];
#pragma ignore warning(perf)
z00 += pSelector_weights[sel].m_c[0];
#pragma ignore warning(perf)
z10 += pSelector_weights[sel].m_c[1];
#pragma ignore warning(perf)
z11 += pSelector_weights[sel].m_c[2];
#pragma ignore warning(perf)
float w = pSelector_weights[sel].m_c[3];
q00_r += w * (int)pColors[i].m_c[0]; t_r += (int)pColors[i].m_c[0];
q00_g += w * (int)pColors[i].m_c[1]; t_g += (int)pColors[i].m_c[1];
q00_b += w * (int)pColors[i].m_c[2]; t_b += (int)pColors[i].m_c[2];
q00_a += w * (int)pColors[i].m_c[3]; t_a += (int)pColors[i].m_c[3];
}
q10_r = t_r - q00_r;
q10_g = t_g - q00_g;
q10_b = t_b - q00_b;
q10_a = t_a - q00_a;
z01 = z10;
float det = z00 * z11 - z01 * z10;
if (det != 0.0f)
det = 1.0f / det;
float iz00, iz01, iz10, iz11;
iz00 = z11 * det;
iz01 = -z01 * det;
iz10 = -z10 * det;
iz11 = z00 * det;
pXl->m_c[0] = (float)(iz00 * q00_r + iz01 * q10_r); pXh->m_c[0] = (float)(iz10 * q00_r + iz11 * q10_r);
pXl->m_c[1] = (float)(iz00 * q00_g + iz01 * q10_g); pXh->m_c[1] = (float)(iz10 * q00_g + iz11 * q10_g);
pXl->m_c[2] = (float)(iz00 * q00_b + iz01 * q10_b); pXh->m_c[2] = (float)(iz10 * q00_b + iz11 * q10_b);
pXl->m_c[3] = (float)(iz00 * q00_a + iz01 * q10_a); pXh->m_c[3] = (float)(iz10 * q00_a + iz11 * q10_a);
}
static void compute_least_squares_endpoints_rgb(uint32_t N, const varying int *uniform pSelectors, const uniform vec4F *uniform pSelector_weights, varying vec4F *uniform pXl, varying vec4F *uniform pXh, const varying color_quad_i *uniform pColors)
{
// Least squares using normal equations: http://www.cs.cornell.edu/~bindel/class/cs3220-s12/notes/lec10.pdf
// I did this in matrix form first, expanded out all the ops, then optimized it a bit.
float z00 = 0.0f, z01 = 0.0f, z10 = 0.0f, z11 = 0.0f;
float q00_r = 0.0f, q10_r = 0.0f, t_r = 0.0f;
float q00_g = 0.0f, q10_g = 0.0f, t_g = 0.0f;
float q00_b = 0.0f, q10_b = 0.0f, t_b = 0.0f;
for (uniform uint32_t i = 0; i < N; i++)
{
const uint32_t sel = pSelectors[i];
#pragma ignore warning(perf)
z00 += pSelector_weights[sel].m_c[0];
#pragma ignore warning(perf)
z10 += pSelector_weights[sel].m_c[1];
#pragma ignore warning(perf)
z11 += pSelector_weights[sel].m_c[2];
#pragma ignore warning(perf)
float w = pSelector_weights[sel].m_c[3];
q00_r += w * (int)pColors[i].m_c[0]; t_r += (int)pColors[i].m_c[0];
q00_g += w * (int)pColors[i].m_c[1]; t_g += (int)pColors[i].m_c[1];
q00_b += w * (int)pColors[i].m_c[2]; t_b += (int)pColors[i].m_c[2];
}
q10_r = t_r - q00_r;
q10_g = t_g - q00_g;
q10_b = t_b - q00_b;
z01 = z10;
float det = z00 * z11 - z01 * z10;
if (det != 0.0f)
det = 1.0f / det;
float iz00, iz01, iz10, iz11;
iz00 = z11 * det;
iz01 = -z01 * det;
iz10 = -z10 * det;
iz11 = z00 * det;
pXl->m_c[0] = (float)(iz00 * q00_r + iz01 * q10_r); pXh->m_c[0] = (float)(iz10 * q00_r + iz11 * q10_r);
pXl->m_c[1] = (float)(iz00 * q00_g + iz01 * q10_g); pXh->m_c[1] = (float)(iz10 * q00_g + iz11 * q10_g);
pXl->m_c[2] = (float)(iz00 * q00_b + iz01 * q10_b); pXh->m_c[2] = (float)(iz10 * q00_b + iz11 * q10_b);
}
static void compute_least_squares_endpoints_a(uint32_t N, const varying int *uniform pSelectors, const vec4F *uniform pSelector_weights, varying float *uniform pXl, varying float *uniform pXh, const varying color_quad_i *uniform pColors)
{
// Least squares using normal equations: http://www.cs.cornell.edu/~bindel/class/cs3220-s12/notes/lec10.pdf
// I did this in matrix form first, expanded out all the ops, then optimized it a bit.
float z00 = 0.0f, z01 = 0.0f, z10 = 0.0f, z11 = 0.0f;
float q00_a = 0.0f, q10_a = 0.0f, t_a = 0.0f;
for (uniform uint32_t i = 0; i < N; i++)
{
const uint32_t sel = pSelectors[i];
#pragma ignore warning(perf)
z00 += pSelector_weights[sel].m_c[0];
#pragma ignore warning(perf)
z10 += pSelector_weights[sel].m_c[1];
#pragma ignore warning(perf)
z11 += pSelector_weights[sel].m_c[2];
#pragma ignore warning(perf)
float w = pSelector_weights[sel].m_c[3];
q00_a += w * (int)pColors[i].m_c[3]; t_a += (int)pColors[i].m_c[3];
}
q10_a = t_a - q00_a;
z01 = z10;
float det = z00 * z11 - z01 * z10;
if (det != 0.0f)
det = 1.0f / det;
float iz00, iz01, iz10, iz11;
iz00 = z11 * det;
iz01 = -z01 * det;
iz10 = -z10 * det;
iz11 = z00 * det;
*pXl = (float)(iz00 * q00_a + iz01 * q10_a); *pXh = (float)(iz10 * q00_a + iz11 * q10_a);
}
struct color_cell_compressor_params
{
uniform uint32_t m_num_selector_weights;
const uint32_t *uniform m_pSelector_weights;
const vec4F *uniform m_pSelector_weightsx;
uniform uint32_t m_comp_bits;
uniform uint32_t m_weights[4];
uniform bool m_has_alpha;
uniform bool m_has_pbits;
uniform bool m_endpoints_share_pbit;
uniform bool m_perceptual;
};
static inline void color_cell_compressor_params_clear(uniform color_cell_compressor_params *uniform p)
{
p->m_num_selector_weights = 0;
p->m_pSelector_weights = NULL;
p->m_pSelector_weightsx = NULL;
p->m_comp_bits = 0;
p->m_perceptual = false;
p->m_weights[0] = 1;
p->m_weights[1] = 1;
p->m_weights[2] = 1;
p->m_weights[3] = 1;
p->m_has_alpha = false;
p->m_has_pbits = false;
p->m_endpoints_share_pbit = false;
}
struct color_cell_compressor_results
{
uint64_t m_best_overall_err;
color_quad_i m_low_endpoint;
color_quad_i m_high_endpoint;
uint32_t m_pbits[2];
varying int *uniform m_pSelectors;
varying int *uniform m_pSelectors_temp;
};
static inline color_quad_i scale_color(const varying color_quad_i *uniform pC, const uniform color_cell_compressor_params *uniform pParams)
{
color_quad_i results;
const uint32_t n = pParams->m_comp_bits + (pParams->m_has_pbits ? 1 : 0);
assert((n >= 4) && (n <= 8));
for (uniform uint32_t i = 0; i < 4; i++)
{
uint32_t v = pC->m_c[i] << (8 - n);
#pragma ignore warning(perf)
v |= (v >> n);
assert(v <= 255);
results.m_c[i] = v;
}
return results;
}
static const float pr_weight = (.5f / (1.0f - .2126f)) * (.5f / (1.0f - .2126f));
static const float pb_weight = (.5f / (1.0f - .0722f)) * (.5f / (1.0f - .0722f));
static inline uint64_t compute_color_distance_rgb(const varying color_quad_i * uniform pE1, const varying color_quad_i *uniform pE2, uniform bool perceptual, const uint32_t uniform weights[4])
{
if (perceptual)
{
const float l1 = pE1->m_c[0] * .2126f + pE1->m_c[1] * .7152f + pE1->m_c[2] * .0722f;
const float cr1 = pE1->m_c[0] - l1;
const float cb1 = pE1->m_c[2] - l1;
const float l2 = pE2->m_c[0] * .2126f + pE2->m_c[1] * .7152f + pE2->m_c[2] * .0722f;
const float cr2 = pE2->m_c[0] - l2;
const float cb2 = pE2->m_c[2] - l2;
float dl = l1 - l2;
float dcr = cr1 - cr2;
float dcb = cb1 - cb2;
return (int64_t)(weights[0] * (dl * dl) + weights[1] * pr_weight * (dcr * dcr) + weights[2] * pb_weight * (dcb * dcb));
}
else
{
float dr = (float)pE1->m_c[0] - (float)pE2->m_c[0];
float dg = (float)pE1->m_c[1] - (float)pE2->m_c[1];
float db = (float)pE1->m_c[2] - (float)pE2->m_c[2];
return (int64_t)(weights[0] * dr * dr + weights[1] * dg * dg + weights[2] * db * db);
}
}
static inline uint64_t compute_color_distance_rgba(const varying color_quad_i *uniform pE1, const varying color_quad_i *uniform pE2, uniform bool perceptual, const uint32_t uniform weights[4])
{
float da = (float)pE1->m_c[3] - (float)pE2->m_c[3];
float a_err = weights[3] * (da * da);
if (perceptual)
{
const float l1 = pE1->m_c[0] * .2126f + pE1->m_c[1] * .7152f + pE1->m_c[2] * .0722f;
const float cr1 = pE1->m_c[0] - l1;
const float cb1 = pE1->m_c[2] - l1;
const float l2 = pE2->m_c[0] * .2126f + pE2->m_c[1] * .7152f + pE2->m_c[2] * .0722f;
const float cr2 = pE2->m_c[0] - l2;
const float cb2 = pE2->m_c[2] - l2;
float dl = l1 - l2;
float dcr = cr1 - cr2;
float dcb = cb1 - cb2;
return (int64_t)(weights[0] * (dl * dl) + weights[1] * pr_weight * (dcr * dcr) + weights[2] * pb_weight * (dcb * dcb) + a_err);
}
else
{
float dr = (float)pE1->m_c[0] - (float)pE2->m_c[0];
float dg = (float)pE1->m_c[1] - (float)pE2->m_c[1];
float db = (float)pE1->m_c[2] - (float)pE2->m_c[2];
return (int64_t)(weights[0] * dr * dr + weights[1] * dg * dg + weights[2] * db * db + a_err);
}
}
static uint64_t pack_mode1_to_one_color(const uniform color_cell_compressor_params *uniform pParams, varying color_cell_compressor_results *uniform pResults, uint32_t r, uint32_t g, uint32_t b,
varying int *uniform pSelectors, uint32_t num_pixels, const varying color_quad_i *uniform pPixels)
{
uint32_t best_err = UINT_MAX;
uint32_t best_p = 0;
for (uniform uint32_t p = 0; p < 2; p++)
{
#pragma ignore warning(perf)
uint32_t err = g_bc7_mode_1_optimal_endpoints[r][p].m_error + g_bc7_mode_1_optimal_endpoints[g][p].m_error + g_bc7_mode_1_optimal_endpoints[b][p].m_error;
if (err < best_err)
{
best_err = err;
best_p = p;
}
}
const endpoint_err *pEr = &g_bc7_mode_1_optimal_endpoints[r][best_p];
const endpoint_err *pEg = &g_bc7_mode_1_optimal_endpoints[g][best_p];
const endpoint_err *pEb = &g_bc7_mode_1_optimal_endpoints[b][best_p];
#pragma ignore warning(perf)
color_quad_i_set(&pResults->m_low_endpoint, pEr->m_lo, pEg->m_lo, pEb->m_lo, 0);
#pragma ignore warning(perf)
color_quad_i_set(&pResults->m_high_endpoint, pEr->m_hi, pEg->m_hi, pEb->m_hi, 0);
pResults->m_pbits[0] = best_p;
pResults->m_pbits[1] = 0;
for (uniform uint32_t i = 0; i < num_pixels; i++)
pSelectors[i] = BC7E_MODE_1_OPTIMAL_INDEX;
color_quad_i p;
for (uniform uint32_t i = 0; i < 3; i++)
{
uint32_t low = ((pResults->m_low_endpoint.m_c[i] << 1) | pResults->m_pbits[0]) << 1;
low |= (low >> 7);
uint32_t high = ((pResults->m_high_endpoint.m_c[i] << 1) | pResults->m_pbits[0]) << 1;
high |= (high >> 7);
p.m_c[i] = (low * (64 - g_bc7_weights3[BC7E_MODE_1_OPTIMAL_INDEX]) + high * g_bc7_weights3[BC7E_MODE_1_OPTIMAL_INDEX] + 32) >> 6;
}
p.m_c[3] = 255;
uint64_t total_err = 0;
for (uniform uint32_t i = 0; i < num_pixels; i++)
total_err += compute_color_distance_rgb(&p, &pPixels[i], pParams->m_perceptual, pParams->m_weights);
pResults->m_best_overall_err = total_err;
return total_err;
}
static uint64_t pack_mode24_to_one_color(const uniform color_cell_compressor_params *uniform pParams, varying color_cell_compressor_results *uniform pResults, uint32_t r, uint32_t g, uint32_t b,
varying int *uniform pSelectors, uint32_t num_pixels, const varying color_quad_i *uniform pPixels)
{
uint32_t er, eg, eb;
if (pParams->m_num_selector_weights == 8)
{
er = g_bc7_mode_4_optimal_endpoints3[r];
eg = g_bc7_mode_4_optimal_endpoints3[g];
eb = g_bc7_mode_4_optimal_endpoints3[b];
}
else
{
er = g_bc7_mode_4_optimal_endpoints2[r];
eg = g_bc7_mode_4_optimal_endpoints2[g];
eb = g_bc7_mode_4_optimal_endpoints2[b];
}
color_quad_i_set(&pResults->m_low_endpoint, er & 0xFF, eg & 0xFF, eb & 0xFF, 0);
color_quad_i_set(&pResults->m_high_endpoint, er >> 8, eg >> 8, eb >> 8, 0);
for (uniform uint32_t i = 0; i < num_pixels; i++)
pSelectors[i] = (pParams->m_num_selector_weights == 8) ? BC7E_MODE_4_OPTIMAL_INDEX3 : BC7E_MODE_4_OPTIMAL_INDEX2;
color_quad_i p;
for (uniform uint32_t i = 0; i < 3; i++)
{
uint32_t low = pResults->m_low_endpoint.m_c[i] << 3;
low |= (low >> 5);
uint32_t high = pResults->m_high_endpoint.m_c[i] << 3;
high |= (high >> 5);
if (pParams->m_num_selector_weights == 8)
p.m_c[i] = (low * (64 - g_bc7_weights3[BC7E_MODE_4_OPTIMAL_INDEX3]) + high * g_bc7_weights3[BC7E_MODE_4_OPTIMAL_INDEX3] + 32) >> 6;
else
p.m_c[i] = (low * (64 - g_bc7_weights2[BC7E_MODE_4_OPTIMAL_INDEX2]) + high * g_bc7_weights2[BC7E_MODE_4_OPTIMAL_INDEX2] + 32) >> 6;
}
p.m_c[3] = 255;
uint64_t total_err = 0;
for (uniform uint32_t i = 0; i < num_pixels; i++)
total_err += compute_color_distance_rgb(&p, &pPixels[i], pParams->m_perceptual, pParams->m_weights);
pResults->m_best_overall_err = total_err;
return total_err;
}
static uint64_t pack_mode0_to_one_color(const uniform color_cell_compressor_params *uniform pParams, varying color_cell_compressor_results *uniform pResults, uint32_t r, uint32_t g, uint32_t b,
varying int *uniform pSelectors, uint32_t num_pixels, const varying color_quad_i *uniform pPixels)
{
uint32_t best_err = UINT_MAX;
uint32_t best_p = 0;
for (uniform uint32_t p = 0; p < 4; p++)
{
#pragma ignore warning(perf)
uint32_t err = g_bc7_mode_0_optimal_endpoints[r][p >> 1][p & 1].m_error + g_bc7_mode_0_optimal_endpoints[g][p >> 1][p & 1].m_error + g_bc7_mode_0_optimal_endpoints[b][p >> 1][p & 1].m_error;
if (err < best_err)
{
best_err = err;