/* $Id: 3df.c,v 1.2 2001-09-05 14:30:43 bird Exp $ */ /* * THIS SOFTWARE IS SUBJECT TO COPYRIGHT PROTECTION AND IS OFFERED ONLY * PURSUANT TO THE 3DFX GLIDE GENERAL PUBLIC LICENSE. THERE IS NO RIGHT * TO USE THE GLIDE TRADEMARK WITHOUT PRIOR WRITTEN PERMISSION OF 3DFX * INTERACTIVE, INC. A COPY OF THIS LICENSE MAY BE OBTAINED FROM THE * DISTRIBUTOR OR BY CONTACTING 3DFX INTERACTIVE INC(info@3dfx.com). * THIS PROGRAM IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESSED OR IMPLIED. SEE THE 3DFX GLIDE GENERAL PUBLIC LICENSE FOR A * FULL TEXT OF THE NON-WARRANTY PROVISIONS. * * USE, DUPLICATION OR DISCLOSURE BY THE GOVERNMENT IS SUBJECT TO * RESTRICTIONS AS SET FORTH IN SUBDIVISION (C)(1)(II) OF THE RIGHTS IN * TECHNICAL DATA AND COMPUTER SOFTWARE CLAUSE AT DFARS 252.227-7013, * AND/OR IN SIMILAR OR SUCCESSOR CLAUSES IN THE FAR, DOD OR NASA FAR * SUPPLEMENT. UNPUBLISHED RIGHTS RESERVED UNDER THE COPYRIGHT LAWS OF */ #include #include #include #include #include "texusint.h" /*************************************** 3df files ****************************/ /* Read word, msb first */ static FxBool _txRead16 (FILE *stream, FxU16* data) { FxU8 byte[2]; if (fread (byte, 2, 1, stream) != 1) return FXFALSE; *data = (((FxU16) byte[0]) << 8) | ((FxU16) byte[1]); return FXTRUE; } /* Read long word, msb first */ static FxBool _txRead32 (FILE *stream, FxU32* data) { FxU8 byte[4]; if (fread (byte, 4, 1, stream) != 1) return FXFALSE; *data = (((FxU32) byte[0]) << 24) | (((FxU32) byte[1]) << 16) | (((FxU32) byte[2]) << 8) | ((FxU32) byte[3]); return FXTRUE; } /* Read NCC table */ static FxBool _txRead3DFNCCTable (FILE* stream, FxI32* ncc_table) { FxU32 i; FxI16 data; /* read Y */ for (i = 0; i < 16; i ++) { if (FXFALSE == _txRead16 (stream, (FxU16 *)&data)) return FXFALSE; ncc_table[i] = (FxU8) data; } /* read A */ for (i = 0; i < 4; i++) { if (!_txRead16 (stream, (FxU16 *)&data)) return FXFALSE; ncc_table[16 + 3 * i + 0] = (FxI32) data; if (!_txRead16 (stream, (FxU16 *)&data)) return FXFALSE; ncc_table[16 + 3 * i + 1] = (FxI32) data; if (!_txRead16 (stream, (FxU16 *)&data)) return FXFALSE; ncc_table[16 + 3 * i + 2] = (FxI32) data; } /* read B */ for (i = 0; i < 4; i++) { if (!_txRead16 (stream, (FxU16 *)&data)) return FXFALSE; ncc_table[28 + 3 * i + 0] = (FxI32) data; if (!_txRead16 (stream, (FxU16 *)&data)) return FXFALSE; ncc_table[28 + 3 * i + 1] = (FxI32) data; if (!_txRead16 (stream, (FxU16 *)&data)) return FXFALSE; ncc_table[28 + 3 * i + 2] = (FxI32) data; } return FXTRUE; } static FxBool _txRead3DFPalTable (FILE* stream, FxI32* pal) { FxU32 i; /* read Y */ for (i = 0; i < 256; i ++) { if (FXFALSE == _txRead32 (stream, (FxU32 *)&pal[i])) return FXFALSE; } return FXTRUE; } /* Read 3df header */ FxBool _txRead3DFHeader(FILE* stream, FxU32 cookie, TxMip *txMip) { int c, i; char version[6]; char color_format[10]; int lod_min, lod_max; int aspect_width, aspect_height; int w, h; /* magic cookie starts with 3df v%6...., of which we've eaten 3d */ // printf("3df file header\n"); if (fscanf (stream, "f v%6s", version) != 1) return FXFALSE; /* * skip comments */ while (((c = getc (stream)) != EOF) && (c == '#')) { while (((c = getc (stream)) != EOF) && (c != '\n')); if (c == EOF) return FXFALSE; } if (c == EOF) return FXFALSE; ungetc (c, stream); /* color format, lod range, aspect ratio */ if (5 != fscanf (stream, "%10s lod range: %i %i aspect ratio: %i %i", color_format, &lod_min, &lod_max, &aspect_width, &aspect_height)) return FXFALSE; // printf("%s %d %d (lods) %d %d (aspect)\n", color_format, lod_min, lod_max, aspect_width, aspect_height); /* eat final nl */ if (((c = getc (stream)) == EOF) && (c != '\n')) return FXFALSE; /* make sure null terminated */ color_format[9] = 0; /* lookup name */ for (i = 0; i <= GR_TEXFMT_ARGB_8888; i++) if (strcmp (Format_Name[i], color_format) == 0) break; if (i > GR_TEXFMT_ARGB_8888) return FXFALSE; txMip->format = i; /* Validate lod */ if ((lod_max & (lod_max-1)) || (lod_min & (lod_min-1))) return FXFALSE; if ((lod_max > 256) || (lod_max < 1)) return FXFALSE; if ((lod_min > 256) || (lod_min < 1)) return FXFALSE; if (lod_min > lod_max) return FXFALSE; /* validate aspect ratio */ w = h = lod_max; switch ((aspect_width << 4) | (aspect_height)) { case 0x81: h = h/8; break; case 0x41: h = h/4; break; case 0x21: h = h/2; break; case 0x11: h = h/1; break; case 0x12: w = w/2; break; case 0x14: w = w/4; break; case 0x18: w = w/8; break; default: return FXFALSE; } txMip->width = w; txMip->height = h; txMip->size = w * h; for (txMip->depth=1; lod_max > lod_min; lod_max >>= 1) { // printf("w = %d, h = %d, lod_max = %d\n", w, h, lod_max); txMip->depth++; if (w > 1) w >>= 1; if (h > 1) h >>= 1; txMip->size += (w * h); } txMip->size *= GR_TEXFMT_SIZE(txMip->format); // printf("3df file: %dx%dx%d:%d\n", txMip->width, txMip->height, txMip->depth, txMip->size); return FXTRUE; } FxBool _txRead3DFData( FILE *stream, TxMip *txMip) { int i, npixels; // printf("3df file data\n"); /* First read NCC tables */ if ((txMip->format == GR_TEXFMT_YIQ_422) || (txMip->format == GR_TEXFMT_AYIQ_8422)) { if (!_txRead3DFNCCTable (stream, (FxI32 *)txMip->pal)) { txError("Bad Ncc table\n"); return FXFALSE; } } if ((txMip->format == GR_TEXFMT_P_8) || (txMip->format == GR_TEXFMT_AP_88)) { if (!_txRead3DFPalTable (stream, (FxI32*)txMip->pal)) { txError("Bad Palette table\n"); return FXFALSE; } } /* read mipmap image data */ if (txMip->format < GR_TEXFMT_16BIT) { npixels = txMip->size; if ((FxU32) npixels != fread (txMip->data[0], 1, npixels, stream)) { txError("Bad 8 bit data"); return FXFALSE; } } else if (txMip->format < GR_TEXFMT_32BIT) { FxU16* data = (FxU16 *) txMip->data[0]; npixels = txMip->size >> 1; for (i = 0; i < npixels; i++, data++) if (FXFALSE == _txRead16 (stream, data)) { txError("Bad 16 bit data"); return FXFALSE; } } else { FxU32* data = (FxU32*) txMip->data[0]; npixels = txMip->size >> 2; for (i = 0; i < npixels; i ++, data++) if (FXFALSE == _txRead32 (stream, data)) { txError("Bad 32 bit data"); return FXFALSE; } } return FXTRUE; }