| 1 | /* |
| 2 | * Texture compression |
| 3 | * Version: 1.0 |
| 4 | * |
| 5 | * Copyright (C) 2004 Daniel Borca All Rights Reserved. |
| 6 | * |
| 7 | * this is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2, or (at your option) |
| 10 | * any later version. |
| 11 | * |
| 12 | * this is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with GNU Make; see the file COPYING. If not, write to |
| 19 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
| 20 | */ |
| 21 | |
| 22 | |
| 23 | #include <assert.h> |
| 24 | |
| 25 | #include "types.h" |
| 26 | #include "internal.h" |
| 27 | #include "dxtn.h" |
| 28 | |
| 29 | |
| 30 | #define GL_COMPRESSED_RGB_S3TC_DXT1_EXT 0x83F0 |
| 31 | #define GL_COMPRESSED_RGBA_S3TC_DXT1_EXT 0x83F1 |
| 32 | #define GL_COMPRESSED_RGBA_S3TC_DXT3_EXT 0x83F2 |
| 33 | #define GL_COMPRESSED_RGBA_S3TC_DXT5_EXT 0x83F3 |
| 34 | |
| 35 | |
| 36 | TAPI void TAPIENTRY |
| 37 | fetch_2d_texel_rgb_dxt1 (int texImage_RowStride, |
| 38 | const byte *texImage_Data, |
| 39 | int i, int j, |
| 40 | byte *texel) |
| 41 | { |
| 42 | dxt1_rgb_decode_1(texImage_Data, texImage_RowStride, i, j, texel); |
| 43 | } |
| 44 | |
| 45 | |
| 46 | TAPI void TAPIENTRY |
| 47 | fetch_2d_texel_rgba_dxt1 (int texImage_RowStride, |
| 48 | const byte *texImage_Data, |
| 49 | int i, int j, |
| 50 | byte *texel) |
| 51 | { |
| 52 | dxt1_rgba_decode_1(texImage_Data, texImage_RowStride, i, j, texel); |
| 53 | } |
| 54 | |
| 55 | |
| 56 | TAPI void TAPIENTRY |
| 57 | fetch_2d_texel_rgba_dxt3 (int texImage_RowStride, |
| 58 | const byte *texImage_Data, |
| 59 | int i, int j, |
| 60 | byte *texel) |
| 61 | { |
| 62 | dxt3_rgba_decode_1(texImage_Data, texImage_RowStride, i, j, texel); |
| 63 | } |
| 64 | |
| 65 | |
| 66 | TAPI void TAPIENTRY |
| 67 | fetch_2d_texel_rgba_dxt5 (int texImage_RowStride, |
| 68 | const byte *texImage_Data, |
| 69 | int i, int j, |
| 70 | byte *texel) |
| 71 | { |
| 72 | dxt5_rgba_decode_1(texImage_Data, texImage_RowStride, i, j, texel); |
| 73 | } |
| 74 | |
| 75 | |
| 76 | TAPI void TAPIENTRY |
| 77 | tx_compress_dxtn (int srccomps, int width, int height, |
| 78 | const byte *source, int destformat, byte *dest, |
| 79 | int destRowStride) |
| 80 | { |
| 81 | int srcRowStride = width * srccomps; |
| 82 | |
| 83 | switch (destformat) { |
| 84 | case GL_COMPRESSED_RGB_S3TC_DXT1_EXT: |
| 85 | dxt1_rgb_encode(width, height, srccomps, |
| 86 | source, srcRowStride, |
| 87 | dest, destRowStride); |
| 88 | break; |
| 89 | case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT: |
| 90 | dxt1_rgba_encode(width, height, srccomps, |
| 91 | source, srcRowStride, |
| 92 | dest, destRowStride); |
| 93 | break; |
| 94 | case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT: |
| 95 | dxt3_rgba_encode(width, height, srccomps, |
| 96 | source, srcRowStride, |
| 97 | dest, destRowStride); |
| 98 | break; |
| 99 | case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT: |
| 100 | dxt5_rgba_encode(width, height, srccomps, |
| 101 | source, srcRowStride, |
| 102 | dest, destRowStride); |
| 103 | break; |
| 104 | default: |
| 105 | assert(0); |
| 106 | } |
| 107 | } |