static void bitmap_hash_dtor(void* key, size_t key_size, void* value, size_t value_size)
{
bitmap_hash_val_t* v = value;
if (v->bm) ass_free_bitmap(v->bm);
if (v->bm_o) ass_free_bitmap(v->bm_o);
if (v->bm_s) ass_free_bitmap(v->bm_s);
free(key);
free(value);
}
// bitmap cache
static void bitmap_destruct(void *key, void *value)
{
BitmapHashValue *v = value;
BitmapHashKey *k = key;
if (v->bm)
ass_free_bitmap(v->bm);
if (v->bm_o)
ass_free_bitmap(v->bm_o);
if (k->type == BITMAP_CLIP)
free(k->u.clip.text);
free(key);
free(value);
}
// composite cache
static void composite_destruct(void *key, void *value)
{
CompositeHashValue *v = value;
CompositeHashKey *k = key;
if (v->bm)
ass_free_bitmap(v->bm);
if (v->bm_o)
ass_free_bitmap(v->bm_o);
if (v->bm_s)
ass_free_bitmap(v->bm_s);
free(k->bitmaps);
free(key);
free(value);
}
Bitmap *outline_to_bitmap(ASS_Library *library, FT_Library ftlib,
FT_Outline *outline, int bord)
{
Bitmap *bm;
int w, h;
int error;
FT_BBox bbox;
FT_Bitmap bitmap;
FT_Outline_Get_CBox(outline, &bbox);
// move glyph to origin (0, 0)
bbox.xMin &= ~63;
bbox.yMin &= ~63;
FT_Outline_Translate(outline, -bbox.xMin, -bbox.yMin);
// bitmap size
bbox.xMax = (bbox.xMax + 63) & ~63;
bbox.yMax = (bbox.yMax + 63) & ~63;
w = (bbox.xMax - bbox.xMin) >> 6;
h = (bbox.yMax - bbox.yMin) >> 6;
// pen offset
bbox.xMin >>= 6;
bbox.yMax >>= 6;
if (w * h > 8000000) {
ass_msg(library, MSGL_WARN, "Glyph bounding box too large: %dx%dpx",
w, h);
return NULL;
}
// allocate and set up bitmap
bm = alloc_bitmap(w + 2 * bord, h + 2 * bord);
bm->left = bbox.xMin - bord;
bm->top = -bbox.yMax - bord;
bitmap.width = w;
bitmap.rows = h;
bitmap.pitch = bm->stride;
bitmap.buffer = bm->buffer + bord + bm->stride * bord;
bitmap.num_grays = 256;
bitmap.pixel_mode = FT_PIXEL_MODE_GRAY;
// render into target bitmap
if ((error = FT_Outline_Get_Bitmap(ftlib, outline, &bitmap))) {
ass_msg(library, MSGL_WARN, "Failed to rasterize glyph: %d\n", error);
ass_free_bitmap(bm);
return NULL;
}
return bm;
}
static Bitmap *outline_to_bitmap_ft(ASS_Renderer *render_priv,
FT_Outline *outline, int bord)
{
Bitmap *bm;
int w, h;
int error;
FT_BBox bbox;
FT_Bitmap bitmap;
FT_Outline_Get_CBox(outline, &bbox);
if (bbox.xMin >= bbox.xMax || bbox.yMin >= bbox.yMax) {
bm = alloc_bitmap(2 * bord, 2 * bord);
if (!bm)
return NULL;
bm->left = bm->top = -bord;
return bm;
}
// move glyph to origin (0, 0)
bbox.xMin &= ~63;
bbox.yMin &= ~63;
FT_Outline_Translate(outline, -bbox.xMin, -bbox.yMin);
if (bbox.xMax > INT_MAX - 63 || bbox.yMax > INT_MAX - 63)
return NULL;
// bitmap size
bbox.xMax = (bbox.xMax + 63) & ~63;
bbox.yMax = (bbox.yMax + 63) & ~63;
w = (bbox.xMax - bbox.xMin) >> 6;
h = (bbox.yMax - bbox.yMin) >> 6;
// pen offset
bbox.xMin >>= 6;
bbox.yMax >>= 6;
if (w < 0 || h < 0 || w > 8000000 / FFMAX(h, 1) ||
w > INT_MAX - 2 * bord || h > INT_MAX - 2 * bord) {
ass_msg(render_priv->library, MSGL_WARN, "Glyph bounding box too large: %dx%dpx",
w, h);
return NULL;
}
// allocate and set up bitmap
bm = alloc_bitmap(w + 2 * bord, h + 2 * bord);
if (!bm)
return NULL;
bm->left = bbox.xMin - bord;
bm->top = -bbox.yMax - bord;
bitmap.width = w;
bitmap.rows = h;
bitmap.pitch = bm->stride;
bitmap.buffer = bm->buffer + bord + bm->stride * bord;
bitmap.num_grays = 256;
bitmap.pixel_mode = FT_PIXEL_MODE_GRAY;
// render into target bitmap
if ((error = FT_Outline_Get_Bitmap(render_priv->ftlibrary, outline, &bitmap))) {
ass_msg(render_priv->library, MSGL_WARN, "Failed to rasterize glyph: %d\n", error);
ass_free_bitmap(bm);
return NULL;
}
return bm;
}
Bitmap *outline_to_bitmap(ASS_Renderer *render_priv,
ASS_Outline *outline, int bord)
{
ASS_Rasterizer *rst = &render_priv->rasterizer;
if (!rasterizer_set_outline(rst, outline)) {
ass_msg(render_priv->library, MSGL_WARN, "Failed to process glyph outline!\n");
return NULL;
}
if (bord < 0 || bord > INT_MAX / 2)
return NULL;
if (rst->x_min >= rst->x_max || rst->y_min >= rst->y_max) {
Bitmap *bm = alloc_bitmap(2 * bord, 2 * bord);
if (!bm)
return NULL;
bm->left = bm->top = -bord;
return bm;
}
if (rst->x_max > INT_MAX - 63 || rst->y_max > INT_MAX - 63)
return NULL;
int x_min = rst->x_min >> 6;
int y_min = rst->y_min >> 6;
int x_max = (rst->x_max + 63) >> 6;
int y_max = (rst->y_max + 63) >> 6;
int w = x_max - x_min;
int h = y_max - y_min;
int mask = (1 << rst->tile_order) - 1;
if (w < 0 || h < 0 || w > 8000000 / FFMAX(h, 1) ||
w > INT_MAX - (2 * bord + mask) || h > INT_MAX - (2 * bord + mask)) {
ass_msg(render_priv->library, MSGL_WARN, "Glyph bounding box too large: %dx%dpx",
w, h);
return NULL;
}
int tile_w = (w + 2 * bord + mask) & ~mask;
int tile_h = (h + 2 * bord + mask) & ~mask;
Bitmap *bm = alloc_bitmap(tile_w, tile_h);
if (!bm)
return NULL;
bm->left = x_min - bord;
bm->top = y_min - bord;
int offs = bord & ~mask;
if (!rasterizer_fill(rst,
bm->buffer + offs * (bm->stride + 1),
x_min - bord + offs,
y_min - bord + offs,
((w + bord + mask) & ~mask) - offs,
((h + bord + mask) & ~mask) - offs,
bm->stride)) {
ass_msg(render_priv->library, MSGL_WARN, "Failed to rasterize glyph!\n");
ass_free_bitmap(bm);
return NULL;
}
return bm;
}