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Add --interleave to tools/gfx and refactor.

Browse Source 
For images composed of 8x16 sprites.

The width has to be manually passed in. If this were an rgbgfx feature this would not be necessary.

Fixes 647f9b4452
This commit is contained in:
yenatch 2017-06-21 23:47:21 -04:00
parent 647f9b4452
commit bcb58c2939
1 changed files with 65 additions and 23 deletions
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86
tools/gfx.c
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@ -7,7 +7,12 @@
#include "common.h"
static void usage(void) {
fprintf(stderr, "Usage: gfx [--trim-whitespace] [--remove-whitespace] [-d depth] [-h] [-o outfile] infile \n");
fprintf(stderr, "Usage: gfx [--trim-whitespace] [--remove-whitespace] [--interleave] [-w width] [-d depth] [-h] [-o outfile] infile\n");
}
static void error(char *message) {
fprintf(stderr, message);
fprintf(stderr, "\n");
}
struct Options {
@ -16,6 +21,8 @@ struct Options {
int help;
char *outfile;
int depth;
int interleave;
int width;
};
struct Options Options = {
@ -26,6 +33,8 @@ void get_args(int argc, char *argv[]) {
struct option long_options[] = {
{"remove-whitespace", no_argument, &Options.remove_whitespace, 1},
{"trim-whitespace", no_argument, &Options.trim_whitespace, 1},
{"interleave", no_argument, &Options.interleave, 1},
{"width", required_argument, 0, 'w'},
{"depth", required_argument, 0, 'd'},
{"help", no_argument, 0, 'h'},
{0}
@ -41,6 +50,9 @@ void get_args(int argc, char *argv[]) {
case 'd':
Options.depth = strtoul(optarg, NULL, 0);
break;
case 'w':
Options.width = strtoul(optarg, NULL, 0);
break;
case 0:
case -1:
break;
@ -52,6 +64,11 @@ void get_args(int argc, char *argv[]) {
}
}
struct Graphic {
int size;
uint8_t *data;
};
bool is_whitespace(uint8_t *tile, int tile_size) {
uint8_t WHITESPACE = 0;
for (int i = 0; i < tile_size; i++) {
@ -62,37 +79,51 @@ bool is_whitespace(uint8_t *tile, int tile_size) {
return true;
}
void trim_whitespace(char *infile, char *outfile) {
int size;
uint8_t *data = read_u8(infile, &size);
void trim_whitespace(struct Graphic *graphic) {
int tile_size = Options.depth * 8;
for (int i = size - tile_size; i > 0; i -= tile_size) {
if (is_whitespace(&data[i], tile_size)) {
size = i;
for (int i = graphic->size - tile_size; i > 0; i -= tile_size) {
if (is_whitespace(&graphic->data[i], tile_size)) {
graphic->size = i;
} else {
break;
}
}
write_u8(outfile, data, size);
}
void remove_whitespace(char *infile, char *outfile) {
int size;
uint8_t *data = read_u8(infile, &size);
void remove_whitespace(struct Graphic *graphic) {
int tile_size = Options.depth * 8;
int i = 0;
for (int j = 0; i < size && j < size; i += tile_size, j += tile_size) {
while (is_whitespace(&data[j], tile_size)) {
for (int j = 0; i < graphic->size && j < graphic->size; i += tile_size, j += tile_size) {
while (is_whitespace(&graphic->data[j], tile_size)) {
j += tile_size;
}
if (j > i) {
memcpy(&data[i], &data[j], tile_size);
memcpy(&graphic->data[i], &graphic->data[j], tile_size);
}
}
size = i;
write_u8(outfile, data, size);
graphic->size = i;
}
void interleave(struct Graphic *graphic, int width) {
int tile_size = Options.depth * 8;
int width_tiles = width / 8;
int num_tiles = graphic->size / tile_size;
uint8_t *interleaved = malloc(graphic->size);
for (int i = 0; i < num_tiles; i++) {
int tile = i * 2;
int row = i / width_tiles;
tile -= width_tiles * row;
if (row % 2) {
tile -= width_tiles;
tile += 1;
}
memcpy(&interleaved[tile * tile_size], &graphic->data[i * tile_size], tile_size);
}
memcpy(graphic->data, interleaved, graphic->size);
free(interleaved);
}
int main(int argc, char *argv[]) {
get_args(argc, argv);
argc -= optind;
@ -106,14 +137,25 @@ int main(int argc, char *argv[]) {
exit(1);
}
char *infile = argv[0];
struct Graphic graphic;
graphic.data = read_u8(infile, &graphic.size);
if (Options.remove_whitespace) {
remove_whitespace(&graphic);
}
if (Options.trim_whitespace) {
trim_whitespace(&graphic);
}
if (Options.interleave) {
if (!Options.width) {
error("interleave: must set --width to a nonzero value");
usage();
exit(1);
}
interleave(&graphic, Options.width);
}
if (Options.outfile) {
remove_whitespace(infile, Options.outfile);
}
} else if (Options.trim_whitespace) {
if (Options.outfile) {
trim_whitespace(infile, Options.outfile);
}
write_u8(Options.outfile, graphic.data, graphic.size);
}
free(graphic.data);
return 0;
}