| // basisu_pvrtc1_4.cpp |
| // Copyright (C) 2019-2021 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. |
| #include "basisu_pvrtc1_4.h" |
| |
| namespace basisu |
| { |
| #if 0 |
| static const uint8_t g_pvrtc_5[32] = { 0,8,16,24,33,41,49,57,66,74,82,90,99,107,115,123,132,140,148,156,165,173,181,189,198,206,214,222,231,239,247,255 }; |
| static const uint8_t g_pvrtc_4[16] = { 0,16,33,49,66,82,99,115,140,156,173,189,206,222,239,255 }; |
| static const uint8_t g_pvrtc_3[8] = { 0,33,74,107,148,181,222,255 }; |
| static const uint8_t g_pvrtc_alpha[9] = { 0,34,68,102,136,170,204,238,255 }; |
| #endif |
| |
| static const uint8_t g_pvrtc_5_nearest[256] = { 0,0,0,0,0,1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,6,6,6,6,6,6,6,6,7,7,7,7,7,7,7,7,8,8,8,8,8,8,8,8,8,9,9,9,9,9,9,9,9,10,10,10,10,10,10,10,10,11,11,11,11,11,11,11,11,12,12,12,12,12,12,12,12,12,13,13,13,13,13,13,13,13,14,14,14,14,14,14,14,14,15,15,15,15,15,15,15,15,16,16,16,16,16,16,16,16,16,17,17,17,17,17,17,17,17,18,18,18,18,18,18,18,18,19,19,19,19,19,19,19,19,20,20,20,20,20,20,20,20,20,21,21,21,21,21,21,21,21,22,22,22,22,22,22,22,22,23,23,23,23,23,23,23,23,24,24,24,24,24,24,24,24,24,25,25,25,25,25,25,25,25,26,26,26,26,26,26,26,26,27,27,27,27,27,27,27,27,28,28,28,28,28,28,28,28,28,29,29,29,29,29,29,29,29,30,30,30,30,30,30,30,30,31,31,31,31 }; |
| static const uint8_t g_pvrtc_4_nearest[256] = { 0,0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,15,15,15,15,15,15,15,15 }; |
| #if 0 |
| static const uint8_t g_pvrtc_3_nearest[256] = { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7 }; |
| static const uint8_t g_pvrtc_alpha_nearest[256] = { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,8,8,8,8,8,8,8,8,8 }; |
| #endif |
| |
| #if 0 |
| static const uint8_t g_pvrtc_5_floor[256] = |
| { |
| 0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,3,3,3,3,3,3,3,3, |
| 3,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,6,6,6,6,6,6,6,6,7,7,7,7,7,7,7, |
| 7,7,8,8,8,8,8,8,8,8,9,9,9,9,9,9,9,9,10,10,10,10,10,10,10,10,11,11,11,11,11,11, |
| 11,11,11,12,12,12,12,12,12,12,12,13,13,13,13,13,13,13,13,14,14,14,14,14,14,14,14,15,15,15,15,15, |
| 15,15,15,15,16,16,16,16,16,16,16,16,17,17,17,17,17,17,17,17,18,18,18,18,18,18,18,18,19,19,19,19, |
| 19,19,19,19,19,20,20,20,20,20,20,20,20,21,21,21,21,21,21,21,21,22,22,22,22,22,22,22,22,23,23,23, |
| 23,23,23,23,23,23,24,24,24,24,24,24,24,24,25,25,25,25,25,25,25,25,26,26,26,26,26,26,26,26,27,27, |
| 27,27,27,27,27,27,27,28,28,28,28,28,28,28,28,29,29,29,29,29,29,29,29,30,30,30,30,30,30,30,30,31 |
| }; |
| |
| static const uint8_t g_pvrtc_5_ceil[256] = |
| { |
| 0,1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,3,3,3,3,3,3,3,3,4,4,4,4,4,4,4, |
| 4,4,5,5,5,5,5,5,5,5,6,6,6,6,6,6,6,6,7,7,7,7,7,7,7,7,8,8,8,8,8,8, |
| 8,8,8,9,9,9,9,9,9,9,9,10,10,10,10,10,10,10,10,11,11,11,11,11,11,11,11,12,12,12,12,12, |
| 12,12,12,12,13,13,13,13,13,13,13,13,14,14,14,14,14,14,14,14,15,15,15,15,15,15,15,15,16,16,16,16, |
| 16,16,16,16,16,17,17,17,17,17,17,17,17,18,18,18,18,18,18,18,18,19,19,19,19,19,19,19,19,20,20,20, |
| 20,20,20,20,20,20,21,21,21,21,21,21,21,21,22,22,22,22,22,22,22,22,23,23,23,23,23,23,23,23,24,24, |
| 24,24,24,24,24,24,24,25,25,25,25,25,25,25,25,26,26,26,26,26,26,26,26,27,27,27,27,27,27,27,27,28, |
| 28,28,28,28,28,28,28,28,29,29,29,29,29,29,29,29,30,30,30,30,30,30,30,30,31,31,31,31,31,31,31,31 |
| }; |
| |
| static const uint8_t g_pvrtc_4_floor[256] = |
| { |
| 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, |
| 1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3, |
| 3,3,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,5,5,5,5,5,5, |
| 5,5,5,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,7,7,7,7,7,7,7,7,7,7,7,7,7, |
| 7,7,7,7,7,7,7,7,7,7,7,7,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,9,9,9,9, |
| 9,9,9,9,9,9,9,9,9,9,9,9,9,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,11,11,11, |
| 11,11,11,11,11,11,11,11,11,11,11,11,11,11,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,13,13, |
| 13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,15 |
| }; |
| |
| static const uint8_t g_pvrtc_4_ceil[256] = |
| { |
| 0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, |
| 2,2,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,4,4,4,4,4,4, |
| 4,4,4,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,6,6,6,6,6,6,6,6,6,6,6,6,6, |
| 6,6,6,6,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,8,8,8,8,8,8,8,8,8,8,8,8, |
| 8,8,8,8,8,8,8,8,8,8,8,8,8,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,10,10,10, |
| 10,10,10,10,10,10,10,10,10,10,10,10,10,10,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,12,12, |
| 12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,14, |
| 14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15 |
| }; |
| |
| static const uint8_t g_pvrtc_3_floor[256] = |
| { |
| 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
| 0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, |
| 1,1,1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, |
| 2,2,2,2,2,2,2,2,2,2,2,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3, |
| 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,4,4,4,4, |
| 4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,5,5,5, |
| 5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,6,6, |
| 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,7 |
| }; |
| |
| static const uint8_t g_pvrtc_3_ceil[256] = |
| { |
| 0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, |
| 1,1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, |
| 2,2,2,2,2,2,2,2,2,2,2,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3, |
| 3,3,3,3,3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4, |
| 4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,5,5,5, |
| 5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,6,6,6,6,6,6,6,6,6,6, |
| 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,7, |
| 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7 |
| }; |
| |
| static const uint8_t g_pvrtc_alpha_floor[256] = |
| { |
| 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
| 0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, |
| 1,1,1,1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, |
| 2,2,2,2,2,2,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3, |
| 3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4, |
| 4,4,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5, |
| 5,5,5,5,5,5,5,5,5,5,5,5,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6, |
| 6,6,6,6,6,6,6,6,6,6,6,6,6,6,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,8 |
| }; |
| |
| static const uint8_t g_pvrtc_alpha_ceil[256] = |
| { |
| 0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, |
| 1,1,1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, |
| 2,2,2,2,2,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3, |
| 3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4, |
| 4,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5, |
| 5,5,5,5,5,5,5,5,5,5,5,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6, |
| 6,6,6,6,6,6,6,6,6,6,6,6,6,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, |
| 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8 |
| }; |
| #endif |
| |
| uint32_t pvrtc4_swizzle_uv(uint32_t width, uint32_t height, uint32_t x, uint32_t y) |
| { |
| assert((x < width) && (y < height) && basisu::is_pow2(height) && basisu::is_pow2(width)); |
| |
| uint32_t min_d = width, max_v = y; |
| if (height < width) |
| { |
| min_d = height; |
| max_v = x; |
| } |
| |
| // Interleave the XY LSB's |
| uint32_t shift_ofs = 0, swizzled = 0; |
| for (uint32_t s_bit = 1, d_bit = 1; s_bit < min_d; s_bit <<= 1, d_bit <<= 2, ++shift_ofs) |
| { |
| if (y & s_bit) swizzled |= d_bit; |
| if (x & s_bit) swizzled |= (2 * d_bit); |
| } |
| |
| max_v >>= shift_ofs; |
| |
| // OR in the rest of the bits from the largest dimension |
| swizzled |= (max_v << (2 * shift_ofs)); |
| |
| return swizzled; |
| } |
| |
| color_rgba pvrtc4_block::get_endpoint(uint32_t endpoint_index, bool unpack) const |
| { |
| assert(endpoint_index < 2); |
| const uint32_t packed = m_endpoints >> (endpoint_index * 16); |
| |
| uint32_t r, g, b, a; |
| if (packed & 0x8000) |
| { |
| // opaque 554 or 555 |
| if (!endpoint_index) |
| { |
| r = (packed >> 10) & 31; |
| g = (packed >> 5) & 31; |
| b = (packed >> 1) & 15; |
| |
| if (unpack) |
| { |
| b = (b << 1) | (b >> 3); |
| } |
| } |
| else |
| { |
| r = (packed >> 10) & 31; |
| g = (packed >> 5) & 31; |
| b = packed & 31; |
| } |
| |
| a = unpack ? 255 : 7; |
| } |
| else |
| { |
| // translucent 4433 or 4443 |
| if (!endpoint_index) |
| { |
| a = (packed >> 12) & 7; |
| r = (packed >> 8) & 15; |
| g = (packed >> 4) & 15; |
| b = (packed >> 1) & 7; |
| |
| if (unpack) |
| { |
| a = (a << 1); |
| a = (a << 4) | a; |
| |
| r = (r << 1) | (r >> 3); |
| g = (g << 1) | (g >> 3); |
| b = (b << 2) | (b >> 1); |
| } |
| } |
| else |
| { |
| a = (packed >> 12) & 7; |
| r = (packed >> 8) & 15; |
| g = (packed >> 4) & 15; |
| b = packed & 15; |
| |
| if (unpack) |
| { |
| a = (a << 1); |
| a = (a << 4) | a; |
| |
| r = (r << 1) | (r >> 3); |
| g = (g << 1) | (g >> 3); |
| b = (b << 1) | (b >> 3); |
| } |
| } |
| } |
| |
| if (unpack) |
| { |
| r = (r << 3) | (r >> 2); |
| g = (g << 3) | (g >> 2); |
| b = (b << 3) | (b >> 2); |
| } |
| |
| assert((r < 256) && (g < 256) && (b < 256) && (a < 256)); |
| |
| return color_rgba(r, g, b, a); |
| } |
| |
| color_rgba pvrtc4_block::get_endpoint_5554(uint32_t endpoint_index) const |
| { |
| assert(endpoint_index < 2); |
| const uint32_t packed = m_endpoints >> (endpoint_index * 16); |
| |
| uint32_t r, g, b, a; |
| if (packed & 0x8000) |
| { |
| // opaque 554 or 555 |
| if (!endpoint_index) |
| { |
| r = (packed >> 10) & 31; |
| g = (packed >> 5) & 31; |
| b = (packed >> 1) & 15; |
| |
| b = (b << 1) | (b >> 3); |
| } |
| else |
| { |
| r = (packed >> 10) & 31; |
| g = (packed >> 5) & 31; |
| b = packed & 31; |
| } |
| |
| a = 15; |
| } |
| else |
| { |
| // translucent 4433 or 4443 |
| if (!endpoint_index) |
| { |
| a = (packed >> 12) & 7; |
| r = (packed >> 8) & 15; |
| g = (packed >> 4) & 15; |
| b = (packed >> 1) & 7; |
| |
| a = a << 1; |
| |
| r = (r << 1) | (r >> 3); |
| g = (g << 1) | (g >> 3); |
| b = (b << 2) | (b >> 1); |
| } |
| else |
| { |
| a = (packed >> 12) & 7; |
| r = (packed >> 8) & 15; |
| g = (packed >> 4) & 15; |
| b = packed & 15; |
| |
| a = a << 1; |
| |
| r = (r << 1) | (r >> 3); |
| g = (g << 1) | (g >> 3); |
| b = (b << 1) | (b >> 3); |
| } |
| } |
| |
| assert((r < 32) && (g < 32) && (b < 32) && (a < 16)); |
| |
| return color_rgba(r, g, b, a); |
| } |
| |
| bool pvrtc4_image::get_interpolated_colors(uint32_t x, uint32_t y, color_rgba* pColors) const |
| { |
| assert((x < m_width) && (y < m_height)); |
| |
| int block_x0 = (static_cast<int>(x) - 2) >> 2; |
| int block_x1 = block_x0 + 1; |
| int block_y0 = (static_cast<int>(y) - 2) >> 2; |
| int block_y1 = block_y0 + 1; |
| |
| block_x0 = posmod(block_x0, m_block_width); |
| block_x1 = posmod(block_x1, m_block_width); |
| block_y0 = posmod(block_y0, m_block_height); |
| block_y1 = posmod(block_y1, m_block_height); |
| |
| pColors[0] = interpolate(x, y, m_blocks(block_x0, block_y0).get_endpoint_5554(0), m_blocks(block_x1, block_y0).get_endpoint_5554(0), m_blocks(block_x0, block_y1).get_endpoint_5554(0), m_blocks(block_x1, block_y1).get_endpoint_5554(0)); |
| pColors[3] = interpolate(x, y, m_blocks(block_x0, block_y0).get_endpoint_5554(1), m_blocks(block_x1, block_y0).get_endpoint_5554(1), m_blocks(block_x0, block_y1).get_endpoint_5554(1), m_blocks(block_x1, block_y1).get_endpoint_5554(1)); |
| |
| if (get_block_uses_transparent_modulation(x >> 2, y >> 2)) |
| { |
| for (uint32_t c = 0; c < 4; c++) |
| { |
| uint32_t m = (pColors[0][c] + pColors[3][c]) / 2; |
| pColors[1][c] = static_cast<uint8_t>(m); |
| pColors[2][c] = static_cast<uint8_t>(m); |
| } |
| pColors[2][3] = 0; |
| return true; |
| } |
| |
| for (uint32_t c = 0; c < 4; c++) |
| { |
| pColors[1][c] = static_cast<uint8_t>((pColors[0][c] * 5 + pColors[3][c] * 3) / 8); |
| pColors[2][c] = static_cast<uint8_t>((pColors[0][c] * 3 + pColors[3][c] * 5) / 8); |
| } |
| |
| return false; |
| } |
| |
| color_rgba pvrtc4_image::get_pixel(uint32_t x, uint32_t y, uint32_t m) const |
| { |
| assert((x < m_width) && (y < m_height)); |
| |
| int block_x0 = (static_cast<int>(x) - 2) >> 2; |
| int block_x1 = block_x0 + 1; |
| int block_y0 = (static_cast<int>(y) - 2) >> 2; |
| int block_y1 = block_y0 + 1; |
| |
| block_x0 = posmod(block_x0, m_block_width); |
| block_x1 = posmod(block_x1, m_block_width); |
| block_y0 = posmod(block_y0, m_block_height); |
| block_y1 = posmod(block_y1, m_block_height); |
| |
| if (get_block_uses_transparent_modulation(x >> 2, y >> 2)) |
| { |
| if (m == 0) |
| return interpolate(x, y, m_blocks(block_x0, block_y0).get_endpoint_5554(0), m_blocks(block_x1, block_y0).get_endpoint_5554(0), m_blocks(block_x0, block_y1).get_endpoint_5554(0), m_blocks(block_x1, block_y1).get_endpoint_5554(0)); |
| else if (m == 3) |
| return interpolate(x, y, m_blocks(block_x0, block_y0).get_endpoint_5554(1), m_blocks(block_x1, block_y0).get_endpoint_5554(1), m_blocks(block_x0, block_y1).get_endpoint_5554(1), m_blocks(block_x1, block_y1).get_endpoint_5554(1)); |
| |
| color_rgba l(interpolate(x, y, m_blocks(block_x0, block_y0).get_endpoint_5554(0), m_blocks(block_x1, block_y0).get_endpoint_5554(0), m_blocks(block_x0, block_y1).get_endpoint_5554(0), m_blocks(block_x1, block_y1).get_endpoint_5554(0))); |
| color_rgba h(interpolate(x, y, m_blocks(block_x0, block_y0).get_endpoint_5554(1), m_blocks(block_x1, block_y0).get_endpoint_5554(1), m_blocks(block_x0, block_y1).get_endpoint_5554(1), m_blocks(block_x1, block_y1).get_endpoint_5554(1))); |
| |
| return color_rgba((l[0] + h[0]) / 2, (l[1] + h[1]) / 2, (l[2] + h[2]) / 2, (m == 2) ? 0 : (l[3] + h[3]) / 2); |
| } |
| else |
| { |
| if (m == 0) |
| return interpolate(x, y, m_blocks(block_x0, block_y0).get_endpoint_5554(0), m_blocks(block_x1, block_y0).get_endpoint_5554(0), m_blocks(block_x0, block_y1).get_endpoint_5554(0), m_blocks(block_x1, block_y1).get_endpoint_5554(0)); |
| else if (m == 3) |
| return interpolate(x, y, m_blocks(block_x0, block_y0).get_endpoint_5554(1), m_blocks(block_x1, block_y0).get_endpoint_5554(1), m_blocks(block_x0, block_y1).get_endpoint_5554(1), m_blocks(block_x1, block_y1).get_endpoint_5554(1)); |
| |
| color_rgba l(interpolate(x, y, m_blocks(block_x0, block_y0).get_endpoint_5554(0), m_blocks(block_x1, block_y0).get_endpoint_5554(0), m_blocks(block_x0, block_y1).get_endpoint_5554(0), m_blocks(block_x1, block_y1).get_endpoint_5554(0))); |
| color_rgba h(interpolate(x, y, m_blocks(block_x0, block_y0).get_endpoint_5554(1), m_blocks(block_x1, block_y0).get_endpoint_5554(1), m_blocks(block_x0, block_y1).get_endpoint_5554(1), m_blocks(block_x1, block_y1).get_endpoint_5554(1))); |
| |
| if (m == 2) |
| return color_rgba((l[0] * 3 + h[0] * 5) / 8, (l[1] * 3 + h[1] * 5) / 8, (l[2] * 3 + h[2] * 5) / 8, (l[3] * 3 + h[3] * 5) / 8); |
| else |
| return color_rgba((l[0] * 5 + h[0] * 3) / 8, (l[1] * 5 + h[1] * 3) / 8, (l[2] * 5 + h[2] * 3) / 8, (l[3] * 5 + h[3] * 3) / 8); |
| } |
| } |
| |
| uint64_t pvrtc4_image::local_endpoint_optimization_opaque(uint32_t bx, uint32_t by, const image& orig_img, bool perceptual) |
| { |
| uint64_t initial_error = evaluate_1x1_endpoint_error(bx, by, orig_img, perceptual, false); |
| if (!initial_error) |
| return initial_error; |
| |
| vec3F c_avg_orig(0); |
| |
| for (int y = 0; y < 7; y++) |
| { |
| const uint32_t py = wrap_y(by * 4 + y - 1); |
| for (uint32_t x = 0; x < 7; x++) |
| { |
| const uint32_t px = wrap_x(bx * 4 + x - 1); |
| |
| const color_rgba& c = orig_img(px, py); |
| |
| c_avg_orig[0] += c[0]; |
| c_avg_orig[1] += c[1]; |
| c_avg_orig[2] += c[2]; |
| } |
| } |
| |
| c_avg_orig *= 1.0f / 49.0f; |
| |
| vec3F quant_colors[2]; |
| quant_colors[0].set(c_avg_orig); |
| quant_colors[0] -= vec3F(.0125f); |
| |
| quant_colors[1].set(c_avg_orig); |
| quant_colors[1] += vec3F(.0125f); |
| |
| float total_weight[2]; |
| |
| bool success = true; |
| |
| for (uint32_t pass = 0; pass < 4; pass++) |
| { |
| vec3F new_colors[2] = { vec3F(0), vec3F(0) }; |
| memset(total_weight, 0, sizeof(total_weight)); |
| |
| static const float s_weights[7][7] = |
| { |
| { 1.000000f, 1.637089f, 2.080362f, 2.242640f, 2.080362f, 1.637089f, 1.000000f }, |
| { 1.637089f, 2.414213f, 3.006572f, 3.242640f, 3.006572f, 2.414213f, 1.637089f }, |
| { 2.080362f, 3.006572f, 3.828426f, 4.242640f, 3.828426f, 3.006572f, 2.080362f }, |
| { 2.242640f, 3.242640f, 4.242640f, 5.000000f, 4.242640f, 3.242640f, 2.242640f }, |
| { 2.080362f, 3.006572f, 3.828426f, 4.242640f, 3.828426f, 3.006572f, 2.080362f }, |
| { 1.637089f, 2.414213f, 3.006572f, 3.242640f, 3.006572f, 2.414213f, 1.637089f }, |
| { 1.000000f, 1.637089f, 2.080362f, 2.242640f, 2.080362f, 1.637089f, 1.000000f } |
| }; |
| |
| for (int y = 0; y < 7; y++) |
| { |
| const uint32_t py = wrap_y(by * 4 + y - 1); |
| for (uint32_t x = 0; x < 7; x++) |
| { |
| const uint32_t px = wrap_x(bx * 4 + x - 1); |
| |
| const color_rgba& orig_c = orig_img(px, py); |
| |
| vec3F color(orig_c[0], orig_c[1], orig_c[2]); |
| |
| uint32_t c = quant_colors[0].squared_distance(color) > quant_colors[1].squared_distance(color); |
| |
| const float weight = s_weights[y][x]; |
| new_colors[c] += color * weight; |
| |
| total_weight[c] += weight; |
| } |
| } |
| |
| if (!total_weight[0] || !total_weight[1]) |
| success = false; |
| |
| quant_colors[0] = new_colors[0] / (float)total_weight[0]; |
| quant_colors[1] = new_colors[1] / (float)total_weight[1]; |
| } |
| |
| if (!success) |
| { |
| quant_colors[0] = c_avg_orig; |
| quant_colors[1] = c_avg_orig; |
| } |
| |
| vec4F colors[2] = { quant_colors[0], quant_colors[1] }; |
| |
| colors[0] += vec3F(.5f); |
| colors[1] += vec3F(.5f); |
| color_rgba color_0((int)colors[0][0], (int)colors[0][1], (int)colors[0][2], 0); |
| color_rgba color_1((int)colors[1][0], (int)colors[1][1], (int)colors[1][2], 0); |
| |
| pvrtc4_block cur_blocks[3][3]; |
| |
| for (int y = -1; y <= 1; y++) |
| { |
| for (int x = -1; x <= 1; x++) |
| { |
| const uint32_t block_x = wrap_block_x(bx + x); |
| const uint32_t block_y = wrap_block_y(by + y); |
| cur_blocks[x + 1][y + 1] = m_blocks(block_x, block_y); |
| } |
| } |
| |
| color_rgba l1(0), h1(0); |
| |
| l1[0] = g_pvrtc_5_nearest[color_0[0]]; |
| h1[0] = g_pvrtc_5_nearest[color_1[0]]; |
| |
| l1[1] = g_pvrtc_5_nearest[color_0[1]]; |
| h1[1] = g_pvrtc_5_nearest[color_1[1]]; |
| |
| l1[2] = g_pvrtc_4_nearest[color_0[2]]; |
| h1[2] = g_pvrtc_5_nearest[color_0[2]]; |
| |
| l1[3] = 0; |
| h1[3] = 0; |
| |
| m_blocks(bx, by).set_endpoint_raw(0, l1, true); |
| m_blocks(bx, by).set_endpoint_raw(1, h1, true); |
| |
| uint64_t e03_err_0 = remap_pixels_influenced_by_endpoint(bx, by, orig_img, perceptual, false); |
| |
| pvrtc4_block blocks0[3][3]; |
| for (int y = -1; y <= 1; y++) |
| { |
| for (int x = -1; x <= 1; x++) |
| { |
| const uint32_t block_x = wrap_block_x(bx + x); |
| const uint32_t block_y = wrap_block_y(by + y); |
| blocks0[x + 1][y + 1] = m_blocks(block_x, block_y); |
| } |
| } |
| |
| l1[0] = g_pvrtc_5_nearest[color_1[0]]; |
| h1[0] = g_pvrtc_5_nearest[color_0[0]]; |
| |
| l1[1] = g_pvrtc_5_nearest[color_1[1]]; |
| h1[1] = g_pvrtc_5_nearest[color_0[1]]; |
| |
| l1[2] = g_pvrtc_4_nearest[color_1[2]]; |
| h1[2] = g_pvrtc_5_nearest[color_0[2]]; |
| |
| l1[3] = 0; |
| h1[3] = 0; |
| |
| m_blocks(bx, by).set_endpoint_raw(0, l1, true); |
| m_blocks(bx, by).set_endpoint_raw(1, h1, true); |
| |
| uint64_t e03_err_1 = remap_pixels_influenced_by_endpoint(bx, by, orig_img, perceptual, false); |
| |
| if (initial_error < std::min(e03_err_0, e03_err_1)) |
| { |
| for (int y = -1; y <= 1; y++) |
| { |
| for (int x = -1; x <= 1; x++) |
| { |
| const uint32_t block_x = wrap_block_x(bx + x); |
| const uint32_t block_y = wrap_block_y(by + y); |
| m_blocks(block_x, block_y) = cur_blocks[x + 1][y + 1]; |
| } |
| } |
| return initial_error; |
| } |
| else if (e03_err_0 < e03_err_1) |
| { |
| for (int y = -1; y <= 1; y++) |
| { |
| for (int x = -1; x <= 1; x++) |
| { |
| const uint32_t block_x = wrap_block_x(bx + x); |
| const uint32_t block_y = wrap_block_y(by + y); |
| m_blocks(block_x, block_y) = blocks0[x + 1][y + 1]; |
| } |
| } |
| assert(e03_err_0 == evaluate_1x1_endpoint_error(bx, by, orig_img, perceptual, false)); |
| return e03_err_0; |
| } |
| |
| assert(e03_err_1 == evaluate_1x1_endpoint_error(bx, by, orig_img, perceptual, false)); |
| return e03_err_1; |
| } |
| |
| } // basisu |
