ref: 21e9a65f0bced514e94f41eeb56253cae9645f87
dir: /src/gfx/main.cpp/
/*
* This file is part of RGBDS.
*
* Copyright (c) 2022, Eldred Habert and RGBDS contributors.
*
* SPDX-License-Identifier: MIT
*/
#include "gfx/main.hpp"
#include <algorithm>
#include <assert.h>
#include <cinttypes>
#include <ctype.h>
#include <limits>
#include <numeric>
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "extern/getopt.h"
#include "platform.h"
#include "version.h"
#include "gfx/convert.hpp"
using namespace std::literals::string_view_literals;
Options options;
static uintmax_t nbErrors;
void warning(char const *fmt, ...) {
va_list ap;
fputs("warning: ", stderr);
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
putc('\n', stderr);
}
void error(char const *fmt, ...) {
va_list ap;
fputs("error: ", stderr);
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
putc('\n', stderr);
if (nbErrors != std::numeric_limits<decltype(nbErrors)>::max())
nbErrors++;
}
[[noreturn]] void fatal(char const *fmt, ...) {
va_list ap;
fputs("FATAL: ", stderr);
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
putc('\n', stderr);
if (nbErrors != std::numeric_limits<decltype(nbErrors)>::max())
nbErrors++;
fprintf(stderr, "Conversion aborted after %ju error%s\n", nbErrors, nbErrors == 1 ? "" : "s");
exit(1);
}
void Options::verbosePrint(char const *fmt, ...) const {
if (beVerbose) {
va_list ap;
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
}
}
// Short options
static char const *optstring = "Aa:b:Cc:Dd:FfhL:mN:n:o:Pp:s:Tt:U:uVvx:Z";
/*
* Equivalent long options
* Please keep in the same order as short opts
*
* Also, make sure long opts don't create ambiguity:
* A long opt's name should start with the same letter as its short opt,
* except if it doesn't create any ambiguity (`verbose` versus `version`).
* This is because long opt matching, even to a single char, is prioritized
* over short opt matching
*/
static struct option const longopts[] = {
{"output-attr-map", no_argument, NULL, 'A'},
{"attr-map", required_argument, NULL, 'a'},
{"base-tiles", required_argument, NULL, 'b'},
{"color-curve", no_argument, NULL, 'C'},
{"colors", required_argument, NULL, 'c'},
{"debug", no_argument, NULL, 'D'}, // Ignored
{"depth", required_argument, NULL, 'd'},
{"fix", no_argument, NULL, 'f'},
{"fix-and-save", no_argument, NULL, 'F'}, // Deprecated
{"horizontal", no_argument, NULL, 'h'}, // Deprecated
{"slice", required_argument, NULL, 'L'},
{"mirror-tiles", no_argument, NULL, 'm'},
{"nb-tiles", required_argument, NULL, 'N'},
{"nb-palettes", required_argument, NULL, 'n'},
{"output", required_argument, NULL, 'o'},
{"output-palette", no_argument, NULL, 'P'},
{"palette", required_argument, NULL, 'p'},
{"output-tilemap", no_argument, NULL, 'T'},
{"tilemap", required_argument, NULL, 't'},
{"unit-size", required_argument, NULL, 'U'},
{"unique-tiles", no_argument, NULL, 'u'},
{"version", no_argument, NULL, 'V'},
{"verbose", no_argument, NULL, 'v'},
{"trim-end", required_argument, NULL, 'x'},
{"columns", no_argument, NULL, 'Z'},
{NULL, no_argument, NULL, 0 }
};
static void printUsage(void) {
fputs("Usage: rgbgfx [-CfmuVZ] [-v [-v ...]] [-a <attr_map> | -A] [-b base_ids]\n"
" [-c color_spec] [-d <depth>] [-L slice] [-N nb_tiles] [-n nb_pals]\n"
" [-o <out_file>] [-p <pal_file> | -P] [-s nb_colors] [-t <tile_map> | -T]\n"
" [-U unit_size] [-x <tiles>] <file>\n"
"Useful options:\n"
" -m, --mirror-tiles optimize out mirrored tiles\n"
" -o, --output <path> set the output binary file\n"
" -t, --tilemap <path> set the output tilemap file\n"
" -u, --unique-tiles optimize out identical tiles\n"
" -V, --version print RGBGFX version and exit\n"
"\n"
"For help, use `man rgbgfx' or go to https://rgbds.gbdev.io/docs/\n",
stderr);
exit(1);
}
/**
* Parses a number at the beginning of a string, moving the pointer to skip the parsed characters
* Returns -1 on error
*/
static uint16_t parseNumber(char *&string, char const *errPrefix) {
uint8_t base = 10;
if (*string == '\0') {
error("%s: expected number, but found nothing", errPrefix);
return -1;
} else if (*string == '$') {
base = 16;
++string;
} else if (*string == '%') {
base = 2;
++string;
} else if (*string == '0' && string[1] != '\0') {
// Check if we have a "0x" or "0b" here
if (string[1] == 'x' || string[1] == 'X') {
base = 16;
string += 2;
} else if (string[1] == 'b' || string[1] == 'B') {
base = 2;
string += 2;
}
}
/**
* Turns a digit into its numeric value in the current base, if it has one.
* Maximum is inclusive. The string_view is modified to "consume" all digits.
* Returns -1 (255) on parse failure (including wrong char for base), in which case
* the string_view may be pointing on garbage.
*/
auto charIndex = [&base](unsigned char c) -> uint8_t {
unsigned char index = c - '0'; // Use wrapping semantics
if (base == 2 && index >= 2) {
return -1;
} else if (index < 10) {
return index;
} else if (base != 16) {
return -1; // Letters are only valid in hex
}
index = tolower(c) - 'a'; // OK because we pass an `unsigned char`
if (index < 6) {
return index + 10;
}
return -1;
};
if (charIndex(*string) == -1) {
error("%s: expected number after base, but found nothing", errPrefix);
return -1;
}
uint16_t number = 0;
do {
// Read a character, and check if it's valid in the given base
number *= base;
uint8_t index = charIndex(*string);
if (index == -1) {
break; // Found an invalid character, end
}
++string;
number += index;
// The lax check covers the addition on top of the multiplication
if (number >= UINT16_MAX / base) {
error("%s: the number is too large!", errPrefix);
return -1;
}
} while (*string != '\0'); // No more characters?
return number;
}
void parsePaletteSpec(char *arg) {
if (arg[0] == '#') {
// List of #rrggbb/#rgb colors, comma-separated, palettes are separated by colons
options.palSpecType = Options::EXPLICIT;
// TODO
} else if (strcasecmp(arg, "embedded") == 0) {
// Use PLTE, error out if missing
options.palSpecType = Options::EMBEDDED;
} else {
// `fmt:path`, parse the file according to the given format
// TODO: split both parts, error out if malformed or file not found
options.palSpecType = Options::EXPLICIT;
// TODO
}
}
int main(int argc, char *argv[]) {
int opt;
bool autoAttrmap = false, autoTilemap = false, autoPalettes = false;
while ((opt = musl_getopt_long_only(argc, argv, optstring, longopts, nullptr)) != -1) {
char *arg = musl_optarg; // Make a copy for scanning
switch (opt) {
case 'A':
autoAttrmap = true;
break;
case 'a':
autoAttrmap = false;
options.attrmap = musl_optarg;
break;
case 'b':
options.baseTileIDs = {0, 0}; // TODO
break;
case 'C':
options.useColorCurve = true;
break;
case 'c':
parsePaletteSpec(musl_optarg);
break;
case 'D':
warning("Ignoring retired option `-D`");
break;
case 'd':
options.bitDepth = parseNumber(arg, "Bit depth");
if (*arg != '\0') {
error("Bit depth (-b) argument must be a valid number, not %s", musl_optarg);
} else if (options.bitDepth != -1 && options.bitDepth != 1 && options.bitDepth != 2) {
error("Bit depth must be 1 or 2, not %" PRIu8);
options.bitDepth = 2;
}
break;
case 'F':
warning("`-F` is now deprecated, and behaves like `-f`");
[[fallthrough]];
case 'f':
options.fixInput = true;
break;
case 'L':
options.inputSlice = {0, 0, 0, 0}; // TODO
break;
case 'm':
options.allowMirroring = true;
[[fallthrough]]; // Imply `-u`
case 'u':
options.allowDedup = true;
break;
case 'N':
options.maxNbTiles = {0, 0}; // TODO
break;
case 'n':
options.nbPalettes = 0; // TODO
break;
case 'o':
options.output = musl_optarg;
break;
case 'P':
autoPalettes = true;
break;
case 'p':
autoPalettes = false;
options.palettes = musl_optarg;
break;
case 's':
options.nbColorsPerPal = 0; // TODO
break;
case 'T':
autoTilemap = true;
break;
case 't':
autoTilemap = false;
options.tilemap = musl_optarg;
break;
case 'V':
printf("rgbgfx %s\n", get_package_version_string());
exit(0);
case 'v':
options.beVerbose = true;
break;
case 'x':
options.trim = parseNumber(arg, "Number of tiles to trim");
if (*arg != '\0') {
error("Tile trim (-x) argument must be a valid number, not %s", musl_optarg);
}
break;
case 'h':
warning("`-h` is deprecated, use `-Z` instead");
[[fallthrough]];
case 'Z':
options.columnMajor = true;
break;
default:
printUsage();
exit(1);
}
}
if (options.nbColorsPerPal == 0) {
options.nbColorsPerPal = 1 << options.bitDepth;
} else if (options.nbColorsPerPal > 1u << options.bitDepth) {
error("%" PRIu8 "bpp palettes can only contain %u colors, not %" PRIu8, options.bitDepth,
1u << options.bitDepth, options.nbColorsPerPal);
}
if (musl_optind == argc) {
fputs("FATAL: No input image specified\n", stderr);
printUsage();
exit(1);
} else if (argc - musl_optind != 1) {
fprintf(stderr, "FATAL: %d input images were specified instead of 1\n", argc - musl_optind);
printUsage();
exit(1);
}
options.input = argv[argc - 1];
auto autoOutPath = [](bool autoOptEnabled, std::string &path, char const *extension) {
if (autoOptEnabled) {
constexpr std::string_view chars =
// Both must start with a dot!
#if defined(_MSC_VER) || defined(__MINGW32__)
"./\\"sv;
#else
"./"sv;
#endif
size_t i = options.input.find_last_of(chars);
if (i != options.input.npos && options.input[i] == '.') {
// We found the last dot, but check if it's part of a stem
// (There must be a non-path separator character before it)
if (i != 0 && chars.find(options.input[i - 1], 1) == chars.npos) {
// We can replace the extension
path.resize(i + 1); // Keep the dot, though
path.append(extension);
}
}
}
};
autoOutPath(autoAttrmap, options.attrmap, ".attrmap");
autoOutPath(autoTilemap, options.tilemap, ".tilemap");
autoOutPath(autoPalettes, options.palettes, ".pal");
if (options.beVerbose) {
fprintf(stderr, "rgbgfx %s\n", get_package_version_string());
fputs("Options:\n", stderr);
if (options.fixInput)
fputs("\tConvert input to indexed\n", stderr);
if (options.columnMajor)
fputs("\tVisit image in column-major order\n", stderr);
if (options.allowMirroring)
fputs("\tAllow mirroring tiles\n", stderr);
if (options.allowDedup)
fputs("\tAllow deduplicating tiles\n", stderr);
if (options.useColorCurve)
fputs("\tUse color curve\n", stderr);
fprintf(stderr, "\tBit depth: %" PRIu8 "bpp\n", options.bitDepth);
if (options.trim != 0)
fprintf(stderr, "\tTrim the last %" PRIu64 " tiles\n", options.trim);
fprintf(stderr, "\tMaximum %" PRIu8 " palettes\n", options.nbPalettes);
fprintf(stderr, "\tPalettes contain %" PRIu8 " colors\n", options.nbColorsPerPal);
fprintf(stderr, "\t%s palette spec\n", []() {
switch (options.palSpecType) {
case Options::NO_SPEC:
return "No";
case Options::EXPLICIT:
return "Explicit";
case Options::EMBEDDED:
return "Embedded";
}
return "???";
}());
fprintf(stderr, "\tDedup unit: %" PRIu16 "x%" PRIu16 " tiles\n", options.unitSize[0],
options.unitSize[1]);
fprintf(stderr,
"\tInput image slice: %" PRIu32 "x%" PRIu32 " pixels from (%" PRIu32 ", %" PRIu32
")\n",
options.inputSlice[2], options.inputSlice[3], options.inputSlice[0],
options.inputSlice[1]);
fprintf(stderr, "\tBase tile IDs: [%" PRIu8 ", %" PRIu8 "]\n", options.baseTileIDs[0],
options.baseTileIDs[1]);
fprintf(stderr, "\tMaximum %" PRIu16 " tiles in bank 0, %" PRIu16 " in bank 1\n",
options.maxNbTiles[0], options.maxNbTiles[1]);
auto printPath = [](char const *name, std::string const &path) {
if (!path.empty()) {
fprintf(stderr, "\t%s: %s\n", name, path.c_str());
}
};
printPath("Input image", options.input);
printPath("Output tile data", options.output);
printPath("Output tilemap", options.tilemap);
printPath("Output attrmap", options.attrmap);
printPath("Output palettes", options.palettes);
fputs("Ready.\n", stderr);
}
process();
return 0;
}
void Palette::addColor(uint16_t color) {
for (size_t i = 0; true; ++i) {
assert(i < colors.size()); // The packing should guarantee this
if (colors[i] == color) { // The color is already present
break;
} else if (colors[i] == UINT16_MAX) { // Empty slot
colors[i] = color;
break;
}
}
}
uint8_t Palette::indexOf(uint16_t color) const {
return std::find(colors.begin(), colors.end(), color) - colors.begin();
}
auto Palette::begin() -> decltype(colors)::iterator {
return colors.begin();
}
auto Palette::end() -> decltype(colors)::iterator {
return std::find(colors.begin(), colors.end(), UINT16_MAX);
}
auto Palette::begin() const -> decltype(colors)::const_iterator {
return colors.begin();
}
auto Palette::end() const -> decltype(colors)::const_iterator {
return std::find(colors.begin(), colors.end(), UINT16_MAX);
}
uint8_t Palette::size() const {
return indexOf(UINT16_MAX);
}