mirror of
https://github.com/Oibaf66/frodo-wii.git
synced 2024-11-29 23:14:23 +01:00
153 lines
3.4 KiB
C++
153 lines
3.4 KiB
C++
#include <arpa/inet.h>
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#include <sys/stat.h>
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#include <SDL.h>
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#include <SDL_image.h>
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#include "game_info.hh"
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#include "utils.hh"
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#define VERSION_BASE (0x1978)
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#define VERSION_MAGIC (VERSION_BASE + 0)
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GameInfo::GameInfo(const char *name, const char *author, SDL_Surface *image)
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{
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this->name = name;
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this->author = author;
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this->screenshot = image;
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}
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GameInfo::~GameInfo()
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{
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this->resetDefaults();
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}
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void GameInfo::resetDefaults()
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{
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free((void*)this->name);
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free((void*)this->author);
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SDL_FreeSurface(this->screenshot);
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this->name = NULL;
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this->author = NULL;
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this->screenshot = NULL;
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}
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struct game_info *GameInfo::dump()
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{
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size_t total_sz = sizeof(struct game_info);
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size_t png_sz;
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struct game_info *out;
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void *png_data;
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if (!this->screenshot)
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return NULL;
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/* Convert surface to PNG */
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png_data = sdl_surface_to_png(this->screenshot, &png_sz);
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panic_if(!png_data, "Cannot create PNG from surface\n");
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total_sz += strlen(this->author) + 1;
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total_sz += strlen(this->name) + 1;
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total_sz += png_sz;
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/* 4-byte align */
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total_sz += 4 - (total_sz & 3);
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/* Allocate everything */
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out = (struct game_info*)xmalloc(total_sz);
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out->sz = total_sz;
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out->version_magic = VERSION_MAGIC;
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out->author_off = 0; /* Starts AFTER the header */
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out->name_off = out->author_off + strlen(this->author) + 1;
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out->screenshot_off = out->name_off + strlen(this->name) + 1;
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memcpy(out->data + out->author_off, this->author, strlen(this->author) + 1);
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memcpy(out->data + out->name_off, this->name, strlen(this->name) + 1);
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memcpy(out->data + out->screenshot_off, png_data, png_sz);
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out->sz = htonl(out->sz);
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out->author_off = htons(out->author_off);
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out->version_magic = htons(out->version_magic);
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out->name_off = htons(out->name_off);
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out->screenshot_off = htons(out->screenshot_off);
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return out;
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}
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bool GameInfo::fromDump(struct game_info *gi)
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{
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SDL_RWops *rw;
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gi->sz = ntohl(gi->sz);
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gi->version_magic = ntohs(gi->version_magic);
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gi->author_off = ntohs(gi->author_off);
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gi->name_off = ntohs(gi->name_off);
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gi->screenshot_off = ntohs(gi->screenshot_off);
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this->author = xstrdup((char*)gi->data + gi->author_off);
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this->name = xstrdup((char*)gi->data + gi->name_off);
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rw = SDL_RWFromMem(gi->data + gi->screenshot_off,
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gi->sz - gi->screenshot_off);
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if (!rw)
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goto bail_out;
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this->screenshot = IMG_Load_RW(rw, 0);
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SDL_FreeRW(rw);
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if (!this->screenshot)
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goto bail_out;
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return true;
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bail_out:
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this->resetDefaults();
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return false;
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}
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GameInfo *GameInfo::loadFromFile(const char *fileName)
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{
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struct stat st;
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struct game_info *p;
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GameInfo *out = NULL;
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FILE *fp;
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printf("Woho! I'll load %s\n", fileName);
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if (stat(fileName, &st) < 0)
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return NULL;
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if (st.st_size <= (signed)sizeof(struct game_info))
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{
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warning("Size of %s is too small: %d vs minimum %d bytes\n",
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fileName, (int)st.st_size, (signed)sizeof(struct game_info) + 4);
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return NULL;
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}
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if (st.st_size % 4 != 0)
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{
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warning("Size of %s is unreasonable: %d\n", fileName, (int)st.st_size);
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return NULL;
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}
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fp = fopen(fileName, "r");
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if (!fp)
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return NULL;
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p = (struct game_info*)xmalloc(st.st_size);
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if (fread(p, 1, st.st_size, fp) == (unsigned)st.st_size)
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{
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out = new GameInfo();
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if (out->fromDump(p) == false)
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{
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warning("Converting %s to GameInfo failed\n",
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fileName);
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delete out;
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out = NULL;
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}
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}
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else
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warning("Could not read %s\n", fileName);
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free(p);
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fclose(fp);
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return out;
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}
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