+++ /dev/null
-/* Project 16 Source Code~
- * Copyright (C) 2012-2016 sparky4 & pngwen & andrius4669 & joncampbell123 & yakui-lover
- *
- * This file is part of Project 16.
- *
- * Project 16 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.
- *
- * Project 16 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/>, or
- * write to the Free Software Foundation, Inc., 51 Franklin Street,
- * Fifth Floor, Boston, MA 02110-1301 USA.
- *
- */
-#include "src/lib/16_vrs.h"
-#include "src/lib/typdefst.h"
-
-// Read .vrs file into far memory
-int read_vrs(global_game_variables_t *gvar, char *filename, struct vrs_container *vrs_cont){
- int fd;
- dword size;
-#ifdef __WATCOMC__
- __segment seg;
- void __based(seg)* bigbuffer;
-#endif
-#ifdef __BORLANDC__
- memptr bigbuffer;
-#endif
- byte huge *buffer;
- vrl1_vgax_offset_t **vrl_line_offsets;
- uint32_t huge *vrl_headers_offsets;
- uint16_t huge *vrl_id_iter;
- uint32_t vrl_size;
- int num_of_vrl, i;
- struct vrl1_vgax_header huge *curr_vrl;
- int success;
-
- // Open filename, get size of file,
- // populate the vrs_container if all tests pass
- fd = open(filename, O_RDONLY|O_BINARY);
- // Insert sanity cheks later
- size = lseek(fd, 0, SEEK_END);
- buffer = malloc(size);
- lseek(fd, 0, SEEK_SET);
- read(fd, buffer, size);
- close(fd);
- if(!success)
- {
- fprintf(stderr, "Unablee to load file");
- exit(3);
- }
- vrs_cont->data_size = size - sizeof(struct vrs_header);
- vrs_cont->buffer = buffer;
-
- // Calculate vrl offsets
-
- // Count sprites
- vrl_id_iter = (uint16_t huge *)(buffer + vrs_cont->vrs_hdr->offset_table[VRS_HEADER_OFFSET_SPRITE_ID_LIST]);
- while(vrl_id_iter[num_of_vrl]){
- num_of_vrl++;
- }
- // Allocate memory for vrl line offsets table
- vrl_line_offsets = malloc(sizeof(vrl1_vgax_offset_t *)*num_of_vrl);
-
- vrl_headers_offsets = (uint32_t huge *)(buffer + vrs_cont->vrs_hdr->offset_table[VRS_HEADER_OFFSET_VRS_LIST]);
- // Calculate line offsets for each vrl
- for(i = 0; i < num_of_vrl; i++){
- curr_vrl = (struct vrl1_vgax_header huge *)(buffer + vrl_headers_offsets[i]);
-
- // Calc. vrl size as (next_offset - curr_offset)
- if (i != num_of_vrl - 1){
- vrl_size = vrl_headers_offsets[i+1] - vrl_headers_offsets[i] - sizeof(struct vrl1_vgax_header);
- }
- // If it's the last vrl, size is (next_vrs_struct_offset - curr_offset)
- else{
- vrl_size = vrs_cont->vrs_hdr->offset_table[VRS_HEADER_OFFSET_SPRITE_ID_LIST] - vrl_headers_offsets[i] - sizeof(struct vrl1_vgax_header);
- }
- vrl_line_offsets[i] = vrl1_vgax_genlineoffsets(curr_vrl, (byte *)curr_vrl + sizeof(struct vrl1_vgax_header), vrl_size);
- }
- vrs_cont->vrl_line_offsets = vrl_line_offsets;
- return 0;
-}
-
-// Seek and return a specified .vrl blob from .vrs blob in far memory
-int get_vrl_by_id(struct vrs_container /*huge*/ *vrs_cont, uint16_t id, struct vrl_container *vrl_cont){
- uint16_t huge *ids;
- uint32_t huge *vrl_offs_list;
- int counter = 0;
-
- // If id is invalid, return -1
- if(id == 0){
- // Probably add an error message?
- return -1;
- }
-
- // Get id list from .vrs blob (base + offset)
- ids = (uint16_t huge*)(vrs_cont->buffer +
- vrs_cont->vrs_hdr->offset_table[VRS_HEADER_OFFSET_SPRITE_ID_LIST]);
-
- // Loop through the id list until we found the right one or hit the end of the list
- // Counter is keeping track of the offset(in ids/vrl blobs)
- while(ids[counter] != id && ids[counter]){
- counter++;
- }
- // Return -2 if we couldn't find the requested id
- if(!ids[counter]){
- // Error message?
- return -2;
- }
-
- // Get vrl offsets list from .vrs blob (base + offset)
- vrl_offs_list = (uint32_t huge *)(vrs_cont->buffer +
- vrs_cont->vrs_hdr->offset_table[VRS_HEADER_OFFSET_VRS_LIST]);
-
- // Get vrl_header from .vrs (base + offset from vrl_list)
- // Counter is number of vrls to skip (ids and vrls are aligned according to the .vrs specification)
- vrl_cont->vrl_header = (struct vrl1_vgax_header huge *)(vrs_cont->buffer + vrl_offs_list[counter]);
-
- // Get .vrl size by integer arithmetics (next vrl offset - current vrl offset)
- if(ids[counter+1]){
- vrl_cont->data_size = vrl_offs_list[counter+1] - vrl_offs_list[counter] - sizeof(struct vrl1_vgax_header);
- }
- // If we are retriving the last vrl, size is ids_list offset - current vrl offset, as next vrl offs is 0
- else{
- vrl_cont->data_size = vrs_cont->vrs_hdr->offset_table[VRS_HEADER_OFFSET_SPRITE_ID_LIST] - vrl_offs_list[counter] - sizeof(struct vrl1_vgax_header);
- }
-
- // Retrive line offsets form .vrs
- vrl_cont->line_offsets = vrs_cont->vrl_line_offsets[counter];
-
- return 0;
-}
projects / 16.git / blobdiff