*
*/
#include "src/lib/16_vrs.h"
-#include "src/lib/typedefst.h"
-
-extern global_game_variables_t gvar;
+#include "src/lib/typdefst.h"
// Read .vrs file into far memory
-int read_vrs(char *filename, struct vrs_container *vrs_cont){
+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);
- size = filelength(fd);
- close(fd);
// Insert sanity cheks later
- CA_LoadFile(filename, buffer, gvar->mm, gvar->mmi);
- vrs_cont->size = size;
+ 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
-struct vrl_container get_vrl_by_id(struct vrs_container huge *vrs_cont, uint16_t id){
+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_list;
- struct vrl_container huge *vrl_cont;
+ uint32_t huge *vrl_offs_list;
int counter = 0;
- // If id is invalid, return null
+
+ // If id is invalid, return -1
if(id == 0){
// Probably add an error message?
- return 0;
+ return -1;
}
+
// Get id list from .vrs blob (base + offset)
- ids = (uint16_t huge*)vrs_cont->buffer +
- (dword)vrs_cont->vrs_hdr->offset_table[VRS_HEADER_OFFSET_SPRITE_ID_LIST];
+ 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 null if we couldn't find the requested id
+ // Return -2 if we couldn't find the requested id
if(!ids[counter]){
// Error message?
- return 0;
+ return -2;
}
- // Get vrl list from .vrs blob (base + offset)
- vrl_list = (uint32_t huge *)(vrs_cont->buffer +
+
+ // 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]);
- // Allocate memory for vrl_cont
- vrl_cont = (struct vrl_container)malloc(sizeof(struct vrl_container));
+
// 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_list[counter]);
- // Get .vrl size by integer arithmetics (next vrl - current vrl)
- // Untested. May be an incorrect way to do so
- vrl_cont->size = vrl_list[counter+1] - vrl_list[counter];
- return vrl_cont;
+ 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