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WIP old converter port, gives funky results

This commit is contained in:
Casey 2024-10-02 06:51:51 +03:00
parent 33e3c1ad8c
commit 1e364fe3ea
Signed by: hkc
GPG Key ID: F0F6CFE11CDB0960
1 changed files with 56 additions and 4 deletions
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60
img2cpi.c
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@ -84,7 +84,8 @@ struct image *image_load(const char *fp);
struct image *image_new(int w, int h);
struct image *image_resize(struct image *original, int new_w, int new_h);
struct image_pal *image_quantize(struct image *original, const union color *colors, size_t n_colors);
int get_color_difference(union color a, union color b);
float get_color_difference(union color a, union color b);
float get_color_brightness(union color clr);
void image_unload(struct image *img);
void get_size_keep_aspect(int w, int h, int dw, int dh, int *ow, int *oh);
@ -251,6 +252,53 @@ int main(int argc, char **argv) {
// use old 2x3
for (int y = 0; y < args.height; y++) {
for (int x = 0; x < args.width; x++) {
unsigned char darkest_i = 0, brightest_i = 0;
float darkest_diff = 0xffffff, brightest_diff = 0;
for (int oy = 0; oy < 3; oy++) {
for (int ox = 0; ox < 2; ox++) {
unsigned char pix = quantized_image->pixels[ox + (x + (y * 3 + oy)) * 2];
float brightness = get_color_brightness(palette[pix]);
if (brightness >= brightest_diff) {
brightest_i = pix;
brightest_diff = brightness;
}
if (brightness <= darkest_diff) {
darkest_i = pix;
darkest_diff = brightness;
}
}
}
unsigned char bitmap = 0;
const static unsigned char pixel_bits[3][2] = { { 1, 2}, { 4, 8 }, { 16, 0 } };
for (int oy = 0; oy < 3; oy++) {
for (int ox = 0; ox < 2; ox++) {
if (ox == 1 && oy == 2) continue;
unsigned char pix = quantized_image->pixels[ox + (x + (y * 3 + oy)) * 2];
float diff_bg = get_color_difference(palette[darkest_i], palette[pix]);
float diff_fg = get_color_difference(palette[brightest_i], palette[pix]);
if (diff_fg < diff_bg) {
bitmap |= pixel_bits[oy][ox];
}
}
}
{
unsigned char pix = quantized_image->pixels[1 + (x + (y * 3 + 2)) * 2];
float diff_bg = get_color_difference(palette[darkest_i], palette[pix]);
float diff_fg = get_color_difference(palette[brightest_i], palette[pix]);
if (diff_fg > diff_bg) {
bitmap ^= 31;
unsigned char tmp = darkest_i;
darkest_i = brightest_i;
brightest_i = tmp;
}
}
characters[x + y * args.width].character = 0x80 + bitmap;
characters[x + y * args.width].bg = darkest_i;
characters[x + y * args.width].fg = brightest_i;
}
}
} else {
@ -258,7 +306,7 @@ int main(int argc, char **argv) {
for (int y = 0; y < args.height; y++) {
for (int x = 0; x < args.width; x++) {
// Oh boy...
int min_diff = 0xffffff;
float min_diff = 0xffffff;
char closest_sym = 0x00, closest_color = 0xae;
for (int sym = 0x01; sym <= 0xFF; sym++) {
if (sym == '\t' || sym == '\n' || sym == '\r' || sym == '\x0e') {
@ -267,7 +315,7 @@ int main(int argc, char **argv) {
for (int color = 0x00; color <= 0xff; color++) {
union color cell_bg = palette[color & 0xF],
cell_fg = palette[color >> 4];
int difference = 0;
float difference = 0;
for (int oy = 0; oy < 11; oy++) {
unsigned char sym_line = font_atlas[sym][oy];
for (int ox = 0; ox < 8; ox++) {
@ -590,13 +638,17 @@ struct image_pal *image_quantize(struct image *original, const union color *colo
return out;
}
int get_color_difference(union color a, union color b) {
float get_color_difference(union color a, union color b) {
int dr = a.rgba.r - b.rgba.r,
dg = a.rgba.g - b.rgba.g,
db = a.rgba.b - b.rgba.b;
return dr * dr + dg * dg + db * db;
}
float get_color_brightness(union color clr) {
return get_color_difference(clr, (union color){ .v = 0 });
}
const union color DEFAULT_PALETTE[16] = {
{ 0xf0, 0xf0, 0xf0, 0xff },
{ 0xf2, 0xb2, 0x33, 0xff },