ref: c3e58795029fcf414cab73d9fb8167bbc204f20c
dir: /src/doom/deh_frame.c/
// // Copyright(C) 2005-2014 Simon Howard // // 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 2 // 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. // // // Parses "Frame" sections in dehacked files // #include <stdio.h> #include <stdlib.h> #include "doomtype.h" #include "d_items.h" #include "info.h" #include "deh_defs.h" #include "deh_io.h" #include "deh_main.h" #include "deh_mapping.h" DEH_BEGIN_MAPPING(state_mapping, state_t) DEH_MAPPING("Sprite number", sprite) DEH_MAPPING("Sprite subnumber", frame) DEH_MAPPING("Duration", tics) DEH_MAPPING("Next frame", nextstate) DEH_MAPPING("Unknown 1", misc1) DEH_MAPPING("Unknown 2", misc2) DEH_UNSUPPORTED_MAPPING("Codep frame") DEH_END_MAPPING static void *DEH_FrameStart(deh_context_t *context, char *line) { int frame_number = 0; state_t *state; if (sscanf(line, "Frame %i", &frame_number) != 1) { DEH_Warning(context, "Parse error on section start"); return NULL; } if (frame_number < 0 || frame_number >= NUMSTATES) { DEH_Warning(context, "Invalid frame number: %i", frame_number); return NULL; } if (frame_number >= DEH_VANILLA_NUMSTATES) { DEH_Warning(context, "Attempt to modify frame %i: this will cause " "problems in Vanilla dehacked.", frame_number); } state = &states[frame_number]; return state; } // Simulate a frame overflow: Doom has 967 frames in the states[] array, but // DOS dehacked internally only allocates memory for 966. As a result, // attempts to set frame 966 (the last frame) will overflow the dehacked // array and overwrite the weaponinfo[] array instead. // // This is noticable in Batman Doom where it is impossible to switch weapons // away from the fist once selected. static void DEH_FrameOverflow(deh_context_t *context, char *varname, int value) { if (!strcasecmp(varname, "Duration")) { weaponinfo[0].ammo = value; } else if (!strcasecmp(varname, "Codep frame")) { weaponinfo[0].upstate = value; } else if (!strcasecmp(varname, "Next frame")) { weaponinfo[0].downstate = value; } else if (!strcasecmp(varname, "Unknown 1")) { weaponinfo[0].readystate = value; } else if (!strcasecmp(varname, "Unknown 2")) { weaponinfo[0].atkstate = value; } else { DEH_Error(context, "Unable to simulate frame overflow: field '%s'", varname); } } static void DEH_FrameParseLine(deh_context_t *context, char *line, void *tag) { state_t *state; char *variable_name, *value; int ivalue; if (tag == NULL) return; state = (state_t *) tag; // Parse the assignment if (!DEH_ParseAssignment(line, &variable_name, &value)) { // Failed to parse DEH_Warning(context, "Failed to parse assignment"); return; } // all values are integers ivalue = atoi(value); if (state == &states[NUMSTATES - 1]) { DEH_FrameOverflow(context, variable_name, ivalue); } else { // set the appropriate field DEH_SetMapping(context, &state_mapping, state, variable_name, ivalue); } } static void DEH_FrameSHA1Sum(sha1_context_t *context) { int i; for (i=0; i<NUMSTATES; ++i) { DEH_StructSHA1Sum(context, &state_mapping, &states[i]); } } deh_section_t deh_section_frame = { "Frame", NULL, DEH_FrameStart, DEH_FrameParseLine, NULL, DEH_FrameSHA1Sum, };