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metaspritegen.cpp
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metaspritegen.cpp
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#include <cstdlib>
#include <cstdio>
#include <fstream>
#include <iostream>
#include <vector>
#include <map>
#include <algorithm>
//pchar_animation_lo_table:
struct sprite_t
{
int x_off;
int y_off;
int pattern;
int attributes;
};
std::uint32_t sprite_byte(sprite_t sprite)
{
unsigned char const x = sprite.x_off;
unsigned char const y = sprite.y_off;
unsigned char const p = sprite.pattern;
unsigned char const a = sprite.attributes;
return x | (y << 8) | (p << 16) | (a << 24);
}
bool operator==(sprite_t lhs, sprite_t rhs)
{
return sprite_byte(lhs) == sprite_byte(rhs);
}
bool operator<(sprite_t lhs, sprite_t rhs)
{
return sprite_byte(lhs) < sprite_byte(rhs);
}
using metasprite_t = std::vector<sprite_t>;
struct animation_t
{
char const* name;
int width;
int height;
int flags;
std::vector<metasprite_t> frames;
};
unsigned char HFLIP = 1 << 6;
unsigned char VFLIP = 1 << 7;
constexpr unsigned char PATTERN(unsigned char x)
{
return x;
}
static std::vector<animation_t> const animations =
{
{ "explosion", 24, 24, 0, {
{
{ 0, 0, PATTERN(0x65), 0 },
{ 0, 8, PATTERN(0x75), 0 },
{ 0, 16, PATTERN(0x65), VFLIP },
{ 8, 0, PATTERN(0x66), 0 },
{ 8, 16, PATTERN(0x66), VFLIP },
{ 16, 0, PATTERN(0x65), HFLIP },
{ 16, 8, PATTERN(0x75), HFLIP },
{ 16, 16, PATTERN(0x65), HFLIP | VFLIP },
},
{
{ 0, 0, PATTERN(0x63), 0 },
{ 0, 8, PATTERN(0x73), 0 },
{ 0, 16, PATTERN(0x63), VFLIP },
{ 8, 0, PATTERN(0x64), 0 },
{ 8, 16, PATTERN(0x64), VFLIP },
{ 16, 0, PATTERN(0x63), HFLIP },
{ 16, 8, PATTERN(0x73), HFLIP },
{ 16, 16, PATTERN(0x63), HFLIP | VFLIP },
},
{
{ 0, 0, PATTERN(0x61), 0 },
{ 0, 8, PATTERN(0x71), 0 },
{ 0, 16, PATTERN(0x61), VFLIP },
{ 8, 0, PATTERN(0x62), 0 },
{ 8, 8, PATTERN(0x72), 0 },
{ 8, 16, PATTERN(0x62), VFLIP },
{ 16, 0, PATTERN(0x61), HFLIP },
{ 16, 8, PATTERN(0x71), HFLIP },
{ 16, 16, PATTERN(0x61), HFLIP | VFLIP },
},
{
{ 4, 4, PATTERN(0x60), 0 },
{ 4, 12, PATTERN(0x70), 0 },
{ 12, 4, PATTERN(0x60), HFLIP },
{ 12, 12, PATTERN(0x70), HFLIP },
},
}},
};
int get_width(std::vector<sprite_t> const& sprites)
{
int x_max = 0;
for(sprite_t sprite : sprites)
if(sprite.x_off > x_max)
x_max = sprite.x_off;
return x_max + 8;
}
int get_height(std::vector<sprite_t> const& sprites)
{
int y_max = 0;
for(sprite_t sprite : sprites)
if(sprite.y_off > y_max)
y_max = sprite.y_off;
return y_max + 8;
}
std::vector<sprite_t> hmirror(std::vector<sprite_t> sprites, int width)
{
for(sprite_t& sprite : sprites)
{
sprite.x_off = width - sprite.x_off - 8;
sprite.attributes ^= HFLIP;
}
return sprites;
}
std::vector<sprite_t> hmirror(std::vector<sprite_t> sprites)
{
return hmirror(sprites, get_width(sprites));
}
int main(int argc, char** argv)
{
if(argc != 2)
{
std::fprintf(stderr, "usage: %s [outfile]\n", argv[0]);
return EXIT_FAILURE;
}
FILE* fp = std::fopen(argv[1], "w");
if(!fp)
{
std::fprintf(stderr, "can't open file %s\n", argv[1]);
return EXIT_FAILURE;
}
std::fprintf(fp, ".scope metasprite\n");
/*
out << "metasprite_lo_table:\n";
for(std::size_t i = 0; i != explosion_metasprites.frames.size(); ++i)
out << ".byt .lobyte(metasprite_" << i << ")\n";
out << "metasprite_hi_table:\n";
for(std::size_t i = 0; i != explosion_metasprites.frames.size(); ++i)
out << ".byt .hibyte(metasprite_" << i << ")\n";
out << '\n';
*/
std::map<metasprite_t, unsigned> frame_map;
unsigned next_frame_id = 0;
for(animation_t const& animation : animations)
{
std::fprintf(fp, "%s:\n", animation.name);
for(metasprite_t frame : animation.frames)
{
auto it = frame_map.find(frame);
if(it == frame_map.end())
it = frame_map.emplace(frame, next_frame_id++).first;
std::fprintf(fp, ".addr m%i\n", it->second);
if(animation.flags & HFLIP)
{
frame = hmirror(frame, animation.width);
auto it = frame_map.find(frame);
if(it == frame_map.end())
it = frame_map.emplace(frame, next_frame_id++).first;
std::fprintf(fp, ".addr m%i\n", it->second);
}
}
}
std::fprintf(fp, "\n");
std::vector<std::pair<unsigned, metasprite_t> > sorted_frames;
for(auto&& pair : frame_map)
sorted_frames.push_back(std::make_pair(pair.second, pair.first));
std::sort(sorted_frames.begin(), sorted_frames.end());
for(auto&& pair : sorted_frames)
{
std::fprintf(fp, "m%i:\n", pair.first);
std::fprintf(fp, ".byt %lu\n", pair.second.size() * 4);
for(sprite_t sprite : pair.second)
{
std::fprintf(fp, ".byt $%02x, $%02x, $%02x, $%02x\n",
sprite.attributes,
sprite.pattern,
(unsigned char)sprite.x_off,
(unsigned char)sprite.y_off);
}
}
std::fprintf(fp, ".endscope\n");
std::fclose(fp);
/*
for(std::size_t i = 0; i != explosion_metasprites.frames.size(); ++i)
{
auto const& metasprite = explosion_metasprites.frames[i];
out << "metasprite_" << i << ":\n";
if(metasprite.empty())
continue;
out << ".byt " << metasprite.size() * 4 << '\n';
for(sprite_t sprite : metasprite)
{
out << ".byt ";
out << (int)sprite.attributes << ", ";
out << (int)sprite.pattern << ", ";
out << (int)sprite.x_off << ", ";
out << (int)sprite.y_off << '\n';
}
}
*/
}