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#include "freetype/fttypes.h"
#include <wayland-client.h>
#include <ft2build.h>
#include <stdint.h>
#include <string.h>
#include FT_FREETYPE_H
#include <stdlib.h>
#include <time.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include "utf_8.h"
static int canvas_width = 0;
static int canvas_height = 0;
#define COLOR 3
double now_sec(void) {
struct timespec ts;
clock_gettime(CLOCK_MONOTONIC, &ts);
return ts.tv_sec + ts.tv_nsec * 1e-9;
}
typedef struct {
int rows;
int width;
int advance_x;
int advance_y;
int bitmap_top;
int bitmap_left;
unsigned char *buffer;
}CachedGlyph;
static CachedGlyph ascii_cache[256] = {0};
CachedGlyph *get_glyph(FT_Face face, uint32_t codepoint)
{
if (codepoint < 256)
{
return &ascii_cache[codepoint];
}
else {
printf("Ohno.");
return 0;
}
}
int load_font(FT_Library library, char *path, FT_Face *face)
{
int error;
error = FT_New_Face(library, path, 0, face);
if (error)
{
printf("Error while loading font");
return 1;
}
error = FT_Set_Char_Size(*face, 0, 48*64, 300, 300);
if (error)
{
printf("Error during setting char size %d", error);
return 1;
}
for (int i = 0; i < 255; i++)
{
int error;
int glyph_index = 0;
glyph_index = FT_Get_Char_Index(*face, i);
error = FT_Load_Glyph(*face, glyph_index, FT_LOAD_RENDER);
if (error)
{
printf("Error during LoadGlyph %d", error);
continue;
}
FT_GlyphSlot slot = (*face)->glyph;
CachedGlyph val = {
.rows = slot->bitmap.rows,
.width = slot->bitmap.width,
.advance_x = slot->advance.x,
.advance_y = slot->advance.y,
.bitmap_top = slot->bitmap_top,
.bitmap_left = slot->bitmap_left,
};
size_t bytes = slot->bitmap.rows * abs(slot->bitmap.pitch) * COLOR;
val.buffer = malloc(bytes);
for (int r = 0; r < val.rows; r++)
{
unsigned char *src = slot->bitmap.buffer + r * abs(slot->bitmap.pitch);
unsigned char *target = val.buffer + r * abs(slot->bitmap.pitch) * COLOR;
for (int c = 0; c < val.width; c++)
{
unsigned char alpha = src[c];
target[c * COLOR + 0] = alpha;
target[c * COLOR + 1] = alpha;
target[c * COLOR + 2] = alpha;
}
}
ascii_cache[i] = val;
}
return 0;
}
int dumbRenderer(FT_Face face, unsigned int codepoint, unsigned char *canvas, int pen_x, int pen_y)
{
int x = 0;
int y = 0;
CachedGlyph *glyph = get_glyph(face, codepoint);
int dst_x = pen_x + glyph->bitmap_left;
int dst_y = pen_y - glyph->bitmap_top;
for (y = 0; y < glyph->rows; y++)
{
int target_y = dst_y + y;
int dst_idx = (target_y * canvas_width + dst_x) * COLOR;
unsigned char *row = glyph->buffer + y * abs(glyph->width * COLOR);
memcpy(&canvas[dst_idx], row, glyph->width * COLOR);
// stupe loop
// for (x = 0; x < bitmap.width; x++)
// {
// int target_x = dst_x + x;
// int idx = (target_y * width + target_x) * COLOR;
// unsigned char alpha = row[x];
// canvas[idx + 0] |= alpha;
// canvas[idx + 1] |= alpha;
// canvas[idx + 2] |= alpha;
// }
}
return (glyph->advance_x >> 6);
}
int main(int argc, char **argv)
{
double t0 = now_sec();
FT_Library library;
FT_Face face;
int error = FT_Init_FreeType(&library);
if (error)
return 1;
// shut up gemini this is where my fonts live
error = load_font(library, "/usr/share/fonts/ubuntu/UbuntuMono-R.ttf", &face);
printf("sucees\n");
if (error)
return 1;
double t1 = now_sec();
// ARGV[1] to Glyph Index Array
uint32_t state = 0;
uint32_t codep = 0;
int glyph_count = 0;
int string_len = strlen(argv[1]);
FT_UInt target_string[string_len + 1];
for (int i = 0; i < string_len; i++) {
utf8_decode(&state, &codep, (uint8_t)argv[1][i]);
if (state == UTF8_REJECT)
printf("Invalid utf8 char: %u\n", (uint8_t)argv[1][i]);
else if (state == UTF8_ACCEPT)
{
target_string[glyph_count] = codep;
glyph_count += 1;
}
}
target_string[glyph_count] = 0;
double t2 = now_sec();
unsigned int *cp = &target_string[0];
char *fname = "out2.ppm";
CachedGlyph *test = get_glyph(face, 65);
int padding = 80;
canvas_width = ((test->advance_x >> 6) * glyph_count) + padding;
printf("width set!");
canvas_height = 360;
unsigned char *canvas = calloc(canvas_width * canvas_height * COLOR, sizeof(unsigned char));
int pen_x = 20;
int pen_y = canvas_height / 2;
printf("Malloc succees");
for (int i = 0; i < 200; i++)
{ // benchmaxxing
unsigned int *cp = &target_string[0];
pen_x = 20;
double t2 = now_sec();
for (; *cp; cp++) {
pen_x += dumbRenderer(face, *cp, canvas, pen_x, pen_y);
}
double t3 = now_sec();
printf("Render: %.6f ms\n", (t3 - t2) * 1000.0);
}
//for (; *cp; cp++)
//{
// pen_x += dumbRenderer(face, *cp, canvas, pen_x, pen_y);
//}
double t3 = now_sec();
int fd = open(fname, O_CREAT | O_RDWR | O_TRUNC);
dprintf(fd, "P6\n%d %d\n255\n", canvas_width, canvas_height);
write(fd, canvas, canvas_width * canvas_height * COLOR);
double t4 = now_sec();
printf("Font Load: %.6f ms\n", (t1 - t0) * 1000.0);
printf("UTF-8 parse: %.6f ms\n", (t2 - t1) * 1000.0);
printf("Render: %.6f ms\n", (t3 - t2) * 1000.0);
printf("Write to file: %.6f ms\n", (t4 - t3) * 1000.0);
close(fd);
free(canvas);
}
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