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Reactos
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18 kB · 909 lines
C
at master
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This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>.*/
/* three separate function for speed when decompressing the bitmaps when modifying one function make the change in the others jay.sorg@gmail.com */
/* indent is confused by this file *//* *INDENT-OFF* */
#include "precomp.h"
#define CVAL(p) (*(p++))#ifdef NEED_ALIGN#ifdef L_ENDIAN#define CVAL2(p, v) { v = (*(p++)); v |= (*(p++)) << 8; }#else#define CVAL2(p, v) { v = (*(p++)) << 8; v |= (*(p++)); }#endif /* L_ENDIAN */#else#define CVAL2(p, v) { v = (*((uint16*)p)); p += 2; }#endif /* NEED_ALIGN */
#define UNROLL8(exp) { exp exp exp exp exp exp exp exp }
#define REPEAT(statement) \{ \ while((count & ~0x7) && ((x+8) < width)) \ UNROLL8( statement; count--; x++; ); \ \ while((count > 0) && (x < width)) \ { \ statement; \ count--; \ x++; \ } \}
#define MASK_UPDATE() \{ \ mixmask <<= 1; \ if (mixmask == 0) \ { \ mask = fom_mask ? fom_mask : CVAL(input); \ mixmask = 1; \ } \}
/* 1 byte bitmap decompress */static RD_BOOLbitmap_decompress1(uint8 * output, int width, int height, uint8 * input, int size){ uint8 *end = input + size; uint8 *prevline = NULL, *line = NULL; int opcode, count, offset, isfillormix, x = width; int lastopcode = -1, insertmix = False, bicolour = False; uint8 code; uint8 colour1 = 0, colour2 = 0; uint8 mixmask, mask = 0; uint8 mix = 0xff; int fom_mask = 0;
while (input < end) { fom_mask = 0; code = CVAL(input); opcode = code >> 4; /* Handle different opcode forms */ switch (opcode) { case 0xc: case 0xd: case 0xe: opcode -= 6; count = code & 0xf; offset = 16; break; case 0xf: opcode = code & 0xf; if (opcode < 9) { count = CVAL(input); count |= CVAL(input) << 8; } else { count = (opcode < 0xb) ? 8 : 1; } offset = 0; break; default: opcode >>= 1; count = code & 0x1f; offset = 32; break; } /* Handle strange cases for counts */ if (offset != 0) { isfillormix = ((opcode == 2) || (opcode == 7)); if (count == 0) { if (isfillormix) count = CVAL(input) + 1; else count = CVAL(input) + offset; } else if (isfillormix) { count <<= 3; } } /* Read preliminary data */ switch (opcode) { case 0: /* Fill */ if ((lastopcode == opcode) && !((x == width) && (prevline == NULL))) insertmix = True; break; case 8: /* Bicolour */ colour1 = CVAL(input); case 3: /* Colour */ colour2 = CVAL(input); break; case 6: /* SetMix/Mix */ case 7: /* SetMix/FillOrMix */ mix = CVAL(input); opcode -= 5; break; case 9: /* FillOrMix_1 */ mask = 0x03; opcode = 0x02; fom_mask = 3; break; case 0x0a: /* FillOrMix_2 */ mask = 0x05; opcode = 0x02; fom_mask = 5; break; } lastopcode = opcode; mixmask = 0; /* Output body */ while (count > 0) { if (x >= width) { if (height <= 0) return False; x = 0; height--; prevline = line; line = output + height * width; } switch (opcode) { case 0: /* Fill */ if (insertmix) { if (prevline == NULL) line[x] = mix; else line[x] = prevline[x] ^ mix; insertmix = False; count--; x++; } if (prevline == NULL) { REPEAT(line[x] = 0) } else { REPEAT(line[x] = prevline[x]) } break; case 1: /* Mix */ if (prevline == NULL) { REPEAT(line[x] = mix) } else { REPEAT(line[x] = prevline[x] ^ mix) } break; case 2: /* Fill or Mix */ if (prevline == NULL) { REPEAT ( MASK_UPDATE(); if (mask & mixmask) line[x] = mix; else line[x] = 0; ) } else { REPEAT ( MASK_UPDATE(); if (mask & mixmask) line[x] = prevline[x] ^ mix; else line[x] = prevline[x]; ) } break; case 3: /* Colour */ REPEAT(line[x] = colour2) break; case 4: /* Copy */ REPEAT(line[x] = CVAL(input)) break; case 8: /* Bicolour */ REPEAT ( if (bicolour) { line[x] = colour2; bicolour = False; } else { line[x] = colour1; bicolour = True; count++; } ) break; case 0xd: /* White */ REPEAT(line[x] = 0xff) break; case 0xe: /* Black */ REPEAT(line[x] = 0) break; default: unimpl("bitmap opcode 0x%x\n", opcode); return False; } } } return True;}
/* 2 byte bitmap decompress */static RD_BOOLbitmap_decompress2(uint8 * output, int width, int height, uint8 * input, int size){ uint8 *end = input + size; uint16 *prevline = NULL, *line = NULL; int opcode, count, offset, isfillormix, x = width; int lastopcode = -1, insertmix = False, bicolour = False; uint8 code; uint16 colour1 = 0, colour2 = 0; uint8 mixmask, mask = 0; uint16 mix = 0xffff; int fom_mask = 0;
while (input < end) { fom_mask = 0; code = CVAL(input); opcode = code >> 4; /* Handle different opcode forms */ switch (opcode) { case 0xc: case 0xd: case 0xe: opcode -= 6; count = code & 0xf; offset = 16; break; case 0xf: opcode = code & 0xf; if (opcode < 9) { count = CVAL(input); count |= CVAL(input) << 8; } else { count = (opcode < 0xb) ? 8 : 1; } offset = 0; break; default: opcode >>= 1; count = code & 0x1f; offset = 32; break; } /* Handle strange cases for counts */ if (offset != 0) { isfillormix = ((opcode == 2) || (opcode == 7)); if (count == 0) { if (isfillormix) count = CVAL(input) + 1; else count = CVAL(input) + offset; } else if (isfillormix) { count <<= 3; } } /* Read preliminary data */ switch (opcode) { case 0: /* Fill */ if ((lastopcode == opcode) && !((x == width) && (prevline == NULL))) insertmix = True; break; case 8: /* Bicolour */ CVAL2(input, colour1); case 3: /* Colour */ CVAL2(input, colour2); break; case 6: /* SetMix/Mix */ case 7: /* SetMix/FillOrMix */ CVAL2(input, mix); opcode -= 5; break; case 9: /* FillOrMix_1 */ mask = 0x03; opcode = 0x02; fom_mask = 3; break; case 0x0a: /* FillOrMix_2 */ mask = 0x05; opcode = 0x02; fom_mask = 5; break; } lastopcode = opcode; mixmask = 0; /* Output body */ while (count > 0) { if (x >= width) { if (height <= 0) return False; x = 0; height--; prevline = line; line = ((uint16 *) output) + height * width; } switch (opcode) { case 0: /* Fill */ if (insertmix) { if (prevline == NULL) line[x] = mix; else line[x] = prevline[x] ^ mix; insertmix = False; count--; x++; } if (prevline == NULL) { REPEAT(line[x] = 0) } else { REPEAT(line[x] = prevline[x]) } break; case 1: /* Mix */ if (prevline == NULL) { REPEAT(line[x] = mix) } else { REPEAT(line[x] = prevline[x] ^ mix) } break; case 2: /* Fill or Mix */ if (prevline == NULL) { REPEAT ( MASK_UPDATE(); if (mask & mixmask) line[x] = mix; else line[x] = 0; ) } else { REPEAT ( MASK_UPDATE(); if (mask & mixmask) line[x] = prevline[x] ^ mix; else line[x] = prevline[x]; ) } break; case 3: /* Colour */ REPEAT(line[x] = colour2) break; case 4: /* Copy */ REPEAT(CVAL2(input, line[x])) break; case 8: /* Bicolour */ REPEAT ( if (bicolour) { line[x] = colour2; bicolour = False; } else { line[x] = colour1; bicolour = True; count++; } ) break; case 0xd: /* White */ REPEAT(line[x] = 0xffff) break; case 0xe: /* Black */ REPEAT(line[x] = 0) break; default: unimpl("bitmap opcode 0x%x\n", opcode); return False; } } } return True;}
/* 3 byte bitmap decompress */static RD_BOOLbitmap_decompress3(uint8 * output, int width, int height, uint8 * input, int size){ uint8 *end = input + size; uint8 *prevline = NULL, *line = NULL; int opcode, count, offset, isfillormix, x = width; int lastopcode = -1, insertmix = False, bicolour = False; uint8 code; uint8 colour1[3] = {0, 0, 0}, colour2[3] = {0, 0, 0}; uint8 mixmask, mask = 0; uint8 mix[3] = {0xff, 0xff, 0xff}; int fom_mask = 0;
while (input < end) { fom_mask = 0; code = CVAL(input); opcode = code >> 4; /* Handle different opcode forms */ switch (opcode) { case 0xc: case 0xd: case 0xe: opcode -= 6; count = code & 0xf; offset = 16; break; case 0xf: opcode = code & 0xf; if (opcode < 9) { count = CVAL(input); count |= CVAL(input) << 8; } else { count = (opcode < 0xb) ? 8 : 1; } offset = 0; break; default: opcode >>= 1; count = code & 0x1f; offset = 32; break; } /* Handle strange cases for counts */ if (offset != 0) { isfillormix = ((opcode == 2) || (opcode == 7)); if (count == 0) { if (isfillormix) count = CVAL(input) + 1; else count = CVAL(input) + offset; } else if (isfillormix) { count <<= 3; } } /* Read preliminary data */ switch (opcode) { case 0: /* Fill */ if ((lastopcode == opcode) && !((x == width) && (prevline == NULL))) insertmix = True; break; case 8: /* Bicolour */ colour1[0] = CVAL(input); colour1[1] = CVAL(input); colour1[2] = CVAL(input); case 3: /* Colour */ colour2[0] = CVAL(input); colour2[1] = CVAL(input); colour2[2] = CVAL(input); break; case 6: /* SetMix/Mix */ case 7: /* SetMix/FillOrMix */ mix[0] = CVAL(input); mix[1] = CVAL(input); mix[2] = CVAL(input); opcode -= 5; break; case 9: /* FillOrMix_1 */ mask = 0x03; opcode = 0x02; fom_mask = 3; break; case 0x0a: /* FillOrMix_2 */ mask = 0x05; opcode = 0x02; fom_mask = 5; break; } lastopcode = opcode; mixmask = 0; /* Output body */ while (count > 0) { if (x >= width) { if (height <= 0) return False; x = 0; height--; prevline = line; line = output + height * (width * 3); } switch (opcode) { case 0: /* Fill */ if (insertmix) { if (prevline == NULL) { line[x * 3] = mix[0]; line[x * 3 + 1] = mix[1]; line[x * 3 + 2] = mix[2]; } else { line[x * 3] = prevline[x * 3] ^ mix[0]; line[x * 3 + 1] = prevline[x * 3 + 1] ^ mix[1]; line[x * 3 + 2] = prevline[x * 3 + 2] ^ mix[2]; } insertmix = False; count--; x++; } if (prevline == NULL) { REPEAT ( line[x * 3] = 0; line[x * 3 + 1] = 0; line[x * 3 + 2] = 0; ) } else { REPEAT ( line[x * 3] = prevline[x * 3]; line[x * 3 + 1] = prevline[x * 3 + 1]; line[x * 3 + 2] = prevline[x * 3 + 2]; ) } break; case 1: /* Mix */ if (prevline == NULL) { REPEAT ( line[x * 3] = mix[0]; line[x * 3 + 1] = mix[1]; line[x * 3 + 2] = mix[2]; ) } else { REPEAT ( line[x * 3] = prevline[x * 3] ^ mix[0]; line[x * 3 + 1] = prevline[x * 3 + 1] ^ mix[1]; line[x * 3 + 2] = prevline[x * 3 + 2] ^ mix[2]; ) } break; case 2: /* Fill or Mix */ if (prevline == NULL) { REPEAT ( MASK_UPDATE(); if (mask & mixmask) { line[x * 3] = mix[0]; line[x * 3 + 1] = mix[1]; line[x * 3 + 2] = mix[2]; } else { line[x * 3] = 0; line[x * 3 + 1] = 0; line[x * 3 + 2] = 0; } ) } else { REPEAT ( MASK_UPDATE(); if (mask & mixmask) { line[x * 3] = prevline[x * 3] ^ mix [0]; line[x * 3 + 1] = prevline[x * 3 + 1] ^ mix [1]; line[x * 3 + 2] = prevline[x * 3 + 2] ^ mix [2]; } else { line[x * 3] = prevline[x * 3]; line[x * 3 + 1] = prevline[x * 3 + 1]; line[x * 3 + 2] = prevline[x * 3 + 2]; } ) } break; case 3: /* Colour */ REPEAT ( line[x * 3] = colour2 [0]; line[x * 3 + 1] = colour2 [1]; line[x * 3 + 2] = colour2 [2]; ) break; case 4: /* Copy */ REPEAT ( line[x * 3] = CVAL(input); line[x * 3 + 1] = CVAL(input); line[x * 3 + 2] = CVAL(input); ) break; case 8: /* Bicolour */ REPEAT ( if (bicolour) { line[x * 3] = colour2[0]; line[x * 3 + 1] = colour2[1]; line[x * 3 + 2] = colour2[2]; bicolour = False; } else { line[x * 3] = colour1[0]; line[x * 3 + 1] = colour1[1]; line[x * 3 + 2] = colour1[2]; bicolour = True; count++; } ) break; case 0xd: /* White */ REPEAT ( line[x * 3] = 0xff; line[x * 3 + 1] = 0xff; line[x * 3 + 2] = 0xff; ) break; case 0xe: /* Black */ REPEAT ( line[x * 3] = 0; line[x * 3 + 1] = 0; line[x * 3 + 2] = 0; ) break; default: unimpl("bitmap opcode 0x%x\n", opcode); return False; } } } return True;}
/* decompress a colour plane */static intprocess_plane(uint8 * in, int width, int height, uint8 * out, int size){ int indexw; int indexh; int code; int collen; int replen; int color; int x; int revcode; uint8 * last_line; uint8 * this_line; uint8 * org_in; uint8 * org_out;
org_in = in; org_out = out; last_line = 0; indexh = 0; while (indexh < height) { out = (org_out + width * height * 4) - ((indexh + 1) * width * 4); color = 0; this_line = out; indexw = 0; if (last_line == 0) { while (indexw < width) { code = CVAL(in); replen = code & 0xf; collen = (code >> 4) & 0xf; revcode = (replen << 4) | collen; if ((revcode <= 47) && (revcode >= 16)) { replen = revcode; collen = 0; } while (collen > 0) { color = CVAL(in); *out = color; out += 4; indexw++; collen--; } while (replen > 0) { *out = color; out += 4; indexw++; replen--; } } } else { while (indexw < width) { code = CVAL(in); replen = code & 0xf; collen = (code >> 4) & 0xf; revcode = (replen << 4) | collen; if ((revcode <= 47) && (revcode >= 16)) { replen = revcode; collen = 0; } while (collen > 0) { x = CVAL(in); if (x & 1) { x = x >> 1; x = x + 1; color = -x; } else { x = x >> 1; color = x; } x = last_line[indexw * 4] + color; *out = x; out += 4; indexw++; collen--; } while (replen > 0) { x = last_line[indexw * 4] + color; *out = x; out += 4; indexw++; replen--; } } } indexh++; last_line = this_line; } return (int) (in - org_in);}
/* 4 byte bitmap decompress */static RD_BOOLbitmap_decompress4(uint8 * output, int width, int height, uint8 * input, int size){ int code; int bytes_pro; int total_pro;
code = CVAL(input); if (code != 0x10) { return False; } total_pro = 1; bytes_pro = process_plane(input, width, height, output + 3, size - total_pro); total_pro += bytes_pro; input += bytes_pro; bytes_pro = process_plane(input, width, height, output + 2, size - total_pro); total_pro += bytes_pro; input += bytes_pro; bytes_pro = process_plane(input, width, height, output + 1, size - total_pro); total_pro += bytes_pro; input += bytes_pro; bytes_pro = process_plane(input, width, height, output + 0, size - total_pro); total_pro += bytes_pro; return size == total_pro;}
/* main decompress function */RD_BOOLbitmap_decompress(uint8 * output, int width, int height, uint8 * input, int size, int Bpp){ RD_BOOL rv = False;
switch (Bpp) { case 1: rv = bitmap_decompress1(output, width, height, input, size); break; case 2: rv = bitmap_decompress2(output, width, height, input, size); break; case 3: rv = bitmap_decompress3(output, width, height, input, size); break; case 4: rv = bitmap_decompress4(output, width, height, input, size); break; default: unimpl("Bpp %d\n", Bpp); break; } return rv;}
/* *INDENT-ON* */