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#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <assert.h>
#include <ft2build.h>
#include FT_GLYPH_H
#include "mp_msg.h"
#include "ass_bitmap.h"
static bitmap_t* alloc_bitmap(int w, int h)
{
bitmap_t* bm;
bm = calloc(1, sizeof(bitmap_t));
bm->buffer = malloc(w*h);
bm->w = w;
bm->h = h;
bm->left = bm->top = 0;
return bm;
}
void ass_free_bitmap(bitmap_t* bm)
{
if (bm) {
if (bm->buffer) free(bm->buffer);
free(bm);
}
}
static bitmap_t* glyph_to_bitmap_internal(FT_Glyph glyph, int bord)
{
FT_BitmapGlyph bg;
FT_Bitmap* bit;
bitmap_t* bm;
int w, h;
unsigned char* src;
unsigned char* dst;
int i;
int error;
error = FT_Glyph_To_Bitmap(&glyph, FT_RENDER_MODE_NORMAL, 0, 0);
if (error) {
mp_msg(MSGT_GLOBAL, MSGL_WARN, "FT_Glyph_To_Bitmap error %d \n", error);
return 0;
}
bg = (FT_BitmapGlyph)glyph;
bit = &(bg->bitmap);
if (bit->pixel_mode != FT_PIXEL_MODE_GRAY) {
mp_msg(MSGT_GLOBAL, MSGL_WARN, "Unsupported pixel mode: %d\n", (int)(bit->pixel_mode));
FT_Done_Glyph(glyph);
return 0;
}
w = bit->width;
h = bit->rows;
bm = alloc_bitmap(w + 2*bord, h + 2*bord);
memset(bm->buffer, 0, bm->w * bm->h);
bm->left = bg->left - bord;
bm->top = - bg->top - bord;
src = bit->buffer;
dst = bm->buffer + bord + bm->w * bord;
for (i = 0; i < h; ++i) {
memcpy(dst, src, w);
src += bit->pitch;
dst += bm->w;
}
return bm;
}
int glyph_to_bitmap(FT_Glyph glyph, FT_Glyph outline_glyph, bitmap_t** bm_g, bitmap_t** bm_o)
{
assert(bm_g);
if (glyph)
*bm_g = glyph_to_bitmap_internal(glyph, 0);
if (!*bm_g)
return 1;
if (outline_glyph && bm_o) {
*bm_o = glyph_to_bitmap_internal(outline_glyph, 0);
if (!*bm_o) {
ass_free_bitmap(*bm_g);
return 1;
}
}
return 0;
}
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