static void init_font(rgui_handle_t *rgui, const uint8_t *font_bmp_buf)
{
uint8_t *font = (uint8_t *) calloc(1, FONT_OFFSET(256));
rgui->alloc_font = true;
for (unsigned i = 0; i < 256; i++)
{
unsigned y = i / 16;
unsigned x = i % 16;
copy_glyph(&font[FONT_OFFSET(i)],
font_bmp_buf + 54 + 3 * (256 * (255 - 16 * y) + 16 * x));
}
rgui->font = font;
}
static void char_to_texture(bm_renderer_t *handle, uint8_t letter,
unsigned atlas_x, unsigned atlas_y)
{
unsigned y, x;
uint8_t *target = handle->atlas.buffer + atlas_x +
atlas_y * handle->atlas.width;
for (y = 0; y < FONT_HEIGHT; y++)
{
for (x = 0; x < FONT_WIDTH; x++)
{
unsigned xo, yo;
unsigned font_pixel = x + y * FONT_WIDTH;
uint8_t rem = 1 << (font_pixel & 7);
unsigned offset = font_pixel >> 3;
uint8_t col = (bitmap_bin[FONT_OFFSET(letter) + offset] & rem) ? 0xff : 0;
uint8_t *dst = target;
dst += x * handle->scale_factor;
dst += y * handle->scale_factor * handle->atlas.width;
for (yo = 0; yo < handle->scale_factor; yo++)
for (xo = 0; xo < handle->scale_factor; xo++)
dst[xo + yo * handle->atlas.width] = col;
}
}
handle->atlas.dirty = true;
}
