Somewhat working blocks module

TODO: dithering
TODO: check if colors are the same to save space
TODO: everything else
This commit is contained in:
Casey 2022-02-01 15:38:23 +03:00
parent 18701f56a6
commit 041ba4b10c
4 changed files with 309 additions and 7 deletions

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@ -1,4 +1,5 @@
#include "colors.h" #include "colors.h"
#include <math.h>
palette_t c_palette_ansi_discord = { palette_t c_palette_ansi_discord = {
.n_colors = 8, .n_colors = 8,
@ -58,13 +59,13 @@ palette_t c_palette_ansi_xterm = {
} }
}; };
int closest_color(palette_t *pal, rgba8 color) int closest_color(palette_t pal, rgba8 color)
{ {
int nearest = -1; int nearest = -1;
int32_t min_distance = 0x0fffffff; int32_t min_distance = 0x0fffffff;
for (int i = 0; i < pal->n_colors; i++) for (int i = 0; i < pal.n_colors; i++)
{ {
rgba8 pal_color = pal->palette[i]; rgba8 pal_color = pal.palette[i];
int16_t dr = pal_color.r - color.r; int16_t dr = pal_color.r - color.r;
int16_t dg = pal_color.g - color.g; int16_t dg = pal_color.g - color.g;
int16_t db = pal_color.b - color.b; int16_t db = pal_color.b - color.b;
@ -78,10 +79,55 @@ int closest_color(palette_t *pal, rgba8 color)
return nearest; return nearest;
} }
int closest_256(palette_t pal, rgba8 color)
{
(void)pal; (void)color;
if (color.r == color.g && color.g == color.b)
{
if (color.r < 8) return 16;
if (color.r > 248) return 231;
return 232 + ceil((color.r - 8.0) / 247.0 * 24.0);
}
uint8_t oc = 16;
oc += 36 * ceil(color.r / 255.0 * 5.0);
oc += 6 * ceil(color.g / 255.0 * 5.0);
oc += ceil(color.b / 255.0 * 5.0);
return oc;
}
rgba8 pal256_to_rgb(palette_t pal, int ndx)
{
rgba8 out = { 0, 0, 0, 255 };
if (ndx < 16)
{
return pal.palette[ndx];
}
else if (ndx >= 232)
{
int l = (ndx - 232) * 255 / 24;
out.r = out.g = out.b = l;
}
else
{
ndx -= 16;
out.b = (ndx % 6) * 42;
ndx /= 6;
out.g = (ndx % 6) * 42;
ndx /= 6;
out.r = (ndx % 6) * 42;
}
return out;
}
float calc_brightness(rgba8 c)
{
return 0.2126 * c.r + 0.7152 * c.g + 0.0722 * c.b;
}
void load_palette_gpl(palette_t *pal, FILE *fp) void load_palette_gpl(palette_t *pal, FILE *fp)
{ {
(void)pal; (void)fp; (void)pal; (void)fp;
// TODO: load GNU palette file // TODO: load GIMP palette file
} }
void load_palette_raw(palette_t *pal, FILE *fp) void load_palette_raw(palette_t *pal, FILE *fp)

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@ -16,9 +16,12 @@ extern palette_t c_palette_ansi_discord;
extern palette_t c_palette_ansi_vga; extern palette_t c_palette_ansi_vga;
extern palette_t c_palette_ansi_xterm; extern palette_t c_palette_ansi_xterm;
int closest_color(palette_t *pal, rgba8 color); int closest_color(palette_t pal, rgba8 color);
int closest_256(palette_t pal, rgba8 color);
rgba8 pal256_to_rgb(palette_t pal, int ndx);
void load_palette_gpl(palette_t *pal, FILE *fp); void load_palette_gpl(palette_t *pal, FILE *fp);
void load_palette_raw(palette_t *pal, FILE *fp); void load_palette_raw(palette_t *pal, FILE *fp);
void load_palette(palette_t *pal, FILE *fp); void load_palette(palette_t *pal, FILE *fp);
float calc_brightness(rgba8 color);
#endif #endif

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@ -3,6 +3,7 @@
#include <stdint.h> #include <stdint.h>
#include <string.h> #include <string.h>
#include "args.h" #include "args.h"
#include "mod_blocks.h"
int main(int argc, char **argv) int main(int argc, char **argv)
{ {
@ -16,5 +17,15 @@ int main(int argc, char **argv)
if (res == 1) return 0; if (res == 1) return 0;
if (res < 0) return -res; if (res < 0) return -res;
switch (args.mode)
{
case ASC_MOD_BLOCKS:
mod_blocks_prepare(&state);
mod_blocks_main(state);
break;
default:
break;
}
return 0; return 0;
} }

View File

@ -1,11 +1,253 @@
#include <stdio.h>
#include "mod_blocks.h" #include "mod_blocks.h"
#include "image.h"
#include "colors.h"
#define BLOCK_TOP "\u2580"
#define BLOCK_BOT "\u2584"
#define BLOCK_FUL "\u2588"
#define BLOCK_NUL " "
#define BLOCK_TOP_ESC "\\u2580"
#define BLOCK_BOT_ESC "\\u2584"
#define BLOCK_FUL_ESC "\\u2588"
#define BLOCK_NUL_ESC " "
void mod_blocks_prepare(asc_state_t *state) void mod_blocks_prepare(asc_state_t *state)
{ {
(void)state; int w, h;
get_size_keep_aspect(
state->source_image->width, state->source_image->height,
state->args.width, state->args.height * 2, &w, &h);
h = (h / 2) * 2;
if (state->args.verbose)
{
fprintf(stderr, "src: %dx%d\n",
state->source_image->width,
state->source_image->height);
fprintf(stderr, "tgt: %dx%d\n", state->args.width, state->args.height * 2);
fprintf(stderr, "dst: %dx%d\n", w, h);
}
state->image = image_resize(state->source_image, w, h);
// TODO: dither
}
void __start_output(asc_state_t state)
{
switch (state.args.out_format)
{
case ASC_FMT_JSON:
fprintf(state.out_file, "{\n");
fprintf(state.out_file, " \"width\": %d,\n", state.image->width);
fprintf(state.out_file, " \"height\": %d,\n", state.image->height);
fprintf(state.out_file, " \"data\": [");
break;
case ASC_FMT_HTML:
fprintf(state.out_file, "<table>\n");
break;
default:
break;
}
}
void __end_output(asc_state_t state)
{
switch (state.args.out_format)
{
case ASC_FMT_JSON:
fprintf(state.out_file, " ]\n}");
break;
case ASC_FMT_HTML:
fprintf(state.out_file, "</table>\n");
break;
default:
break;
}
}
void __start_line(FILE *fp, asc_format_t fmt, bool final)
{
(void)final;
switch (fmt)
{
case ASC_FMT_JSON:
fprintf(fp, " [\n");
break;
case ASC_FMT_HTML:
fprintf(fp, "<tr>");
default:
break;
}
}
void __end_line(FILE *fp, asc_format_t fmt, asc_style_t stl, bool final)
{
switch (fmt)
{
case ASC_FMT_JSON:
fprintf(fp, final ? " ]\n" : " ],\n");
break;
case ASC_FMT_HTML:
fprintf(fp, "</tr>\n");
break;
default:
if (stl != ASC_STL_BLACKWHITE) fprintf(fp, "\033[0m");
fprintf(fp, "\n");
break;
}
}
void __putc_bw(char *px, FILE *fp, asc_format_t fmt, bool final)
{
switch (fmt)
{
case ASC_FMT_JSON:
fprintf(fp, final ? "\"%s\"" : "\"%s\", ", px);
break;
case ASC_FMT_HTML:
fprintf(fp, "<td>%s</td>", px);
break;
default:
fprintf(fp, "%s", px);
break;
}
}
void __putc_ansi(FILE *fp, asc_format_t fmt, bool final, int ct, int cb, palette_t pal)
{
rgba8 top_rgb = pal.palette[ct], bot_rgb = pal.palette[cb];
int top_int = top_rgb.r << 16 | top_rgb.g << 8 | top_rgb.b;
int bot_int = bot_rgb.r << 16 | bot_rgb.g << 8 | bot_rgb.b;
switch (fmt)
{
case ASC_FMT_JSON:
fprintf(fp, "{ \"char\": \"%s\", \"fg\": %d, \"bg\": %d }",
BLOCK_TOP_ESC, top_int, bot_int);
if (!final) fprintf(fp, ", ");
break;
case ASC_FMT_HTML:
fprintf(fp, "<td style=\"color: rgb(%d, %d, %d); background: rgb(%d, %d, %d);\">%s</td>",
top_rgb.r, top_rgb.g, top_rgb.b,
bot_rgb.r, bot_rgb.g, bot_rgb.b,
BLOCK_TOP);
break;
default:
fprintf(fp, "\033[%d;%dm%s",
ct + (ct >= 8 ? 82 : 30),
cb + (cb >= 8 ? 92 : 40),
BLOCK_TOP);
break;
}
}
void __putc_256(FILE *fp, asc_format_t fmt, bool final, int ct, int cb, palette_t pal)
{
rgba8 top_rgb = pal256_to_rgb(pal, ct), bot_rgb = pal256_to_rgb(pal, cb);
int top_int = top_rgb.r << 16 | top_rgb.g << 8 | top_rgb.b;
int bot_int = bot_rgb.r << 16 | bot_rgb.g << 8 | bot_rgb.b;
switch (fmt)
{
case ASC_FMT_JSON:
fprintf(fp, "{ \"char\": \"%s\", \"fg\": %d, \"bg\": %d }",
BLOCK_TOP_ESC, top_int, bot_int);
if (!final) fprintf(fp, ", ");
break;
case ASC_FMT_HTML:
fprintf(fp, "<td style=\"color: rgb(%d, %d, %d); background: rgb(%d, %d, %d);\">%s</td>",
top_rgb.r, top_rgb.g, top_rgb.b,
bot_rgb.r, bot_rgb.g, bot_rgb.b,
BLOCK_TOP);
break;
default:
fprintf(fp, "\033[38;5;%d;48;5;%dm%s", ct, cb, BLOCK_TOP);
break;
}
}
void __putc_truecolor(FILE *fp, asc_format_t fmt, bool final, rgba8 top, rgba8 bot)
{
int top_int = top.r << 16 | top.g << 8 | top.b;
int bot_int = bot.r << 16 | bot.g << 8 | bot.b;
switch (fmt)
{
case ASC_FMT_JSON:
fprintf(fp, "{ \"char\": \"%s\", \"fg\": %d, \"bg\": %d }",
BLOCK_TOP_ESC, top_int, bot_int);
if (!final) fprintf(fp, ", ");
break;
case ASC_FMT_HTML:
fprintf(fp, "<td style=\"color: rgb(%d, %d, %d); background: rgb(%d, %d, %d);\">%s</td>",
top.r, top.g, top.b, bot.r, bot.g, bot.b, BLOCK_TOP);
break;
default:
fprintf(fp, "\033[38;2;%d;%d;%d;48;2;%d;%d;%dm%s",
top.r, top.g, top.b, bot.r, bot.g, bot.b, BLOCK_TOP);
break;
}
}
void __put_pixel(asc_state_t state, rgba8 top, rgba8 bot, bool final)
{
asc_format_t fmt = state.args.out_format;
FILE *fp = state.out_file;
switch (state.args.out_style)
{
case ASC_STL_BLACKWHITE:
{
bool bri_top = calc_brightness(top) > 0.5;
bool bri_bot = calc_brightness(bot) > 0.5;
if ( bri_top && bri_bot) __putc_bw(BLOCK_FUL_ESC, fp, fmt, final);
if (!bri_top && bri_bot) __putc_bw(BLOCK_BOT_ESC, fp, fmt, final);
if ( bri_top && !bri_bot) __putc_bw(BLOCK_TOP_ESC, fp, fmt, final);
if (!bri_top && !bri_bot) __putc_bw(BLOCK_NUL_ESC, fp, fmt, final);
}
break;
case ASC_STL_ANSI_VGA:
case ASC_STL_ANSI_XTERM:
case ASC_STL_ANSI_DISCORD:
{
palette_t pal;
if(state.args.out_style == ASC_STL_ANSI_VGA)
pal = c_palette_ansi_vga;
if(state.args.out_style == ASC_STL_ANSI_XTERM)
pal = c_palette_ansi_xterm;
if(state.args.out_style == ASC_STL_ANSI_DISCORD)
pal = c_palette_ansi_discord;
int index_top = closest_color(pal, top),
index_bot = closest_color(pal, bot);
__putc_ansi(fp, fmt, final, index_top, index_bot, pal);
}
break;
case ASC_STL_256COLOR:
{
int index_top = closest_256(c_palette_ansi_vga, top),
index_bot = closest_256(c_palette_ansi_vga, bot);
__putc_256(fp, fmt, final, index_top, index_bot, c_palette_ansi_vga);
}
break;
case ASC_STL_TRUECOLOR:
{
__putc_truecolor(fp, fmt, final, top, bot);
}
default:
break;
}
} }
void mod_blocks_main(asc_state_t state) void mod_blocks_main(asc_state_t state)
{ {
(void)state; image_t *img = state.image;
__start_output(state);
for (int y = 0; y < img->height; y += 2)
{
bool final = y >= (img->height - 2);
__start_line(state.out_file, state.args.out_format, final);
for (int x = 0; x < img->width; x++)
{
rgba8 top = img->pixels[x + y * img->width];
rgba8 bot = img->pixels[x + (y + 1) * img->width];
__put_pixel(state, top, bot, x >= (img->width - 1));
}
__end_line(state.out_file, state.args.out_format, state.args.out_style, final);
}
__end_output(state);
} }