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/*
* Copyright (C) 2006 Evgeniy Stepanov <eugeni.stepanov@gmail.com>
*
* This file is part of libass.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef LIBASS_BITMAP_H
#define LIBASS_BITMAP_H
#include <stdbool.h>
#include <ft2build.h>
#include FT_GLYPH_H
#include "ass.h"
typedef struct ass_synth_priv ASS_SynthPriv;
ASS_SynthPriv *ass_synth_init(double);
void ass_synth_done(ASS_SynthPriv *priv);
struct segment;
typedef void (*FillSolidTileFunc)(uint8_t *buf, ptrdiff_t stride, int set);
typedef void (*FillHalfplaneTileFunc)(uint8_t *buf, ptrdiff_t stride,
int32_t a, int32_t b, int64_t c, int32_t scale);
typedef void (*FillGenericTileFunc)(uint8_t *buf, ptrdiff_t stride,
const struct segment *line, size_t n_lines,
int winding);
typedef void (*BitmapBlendFunc)(uint8_t *dst, intptr_t dst_stride,
uint8_t *src, intptr_t src_stride,
intptr_t height, intptr_t width);
typedef void (*BitmapMulFunc)(uint8_t *dst, intptr_t dst_stride,
uint8_t *src1, intptr_t src1_stride,
uint8_t *src2, intptr_t src2_stride,
intptr_t width, intptr_t height);
typedef void (*BeBlurFunc)(uint8_t *buf, intptr_t w, intptr_t h,
intptr_t stride, uint16_t *tmp);
#define C_ALIGN_ORDER 5
typedef struct {
int align_order; // log2(alignment)
// rasterizer functions
#if CONFIG_RASTERIZER
int tile_order; // log2(tile_size)
FillSolidTileFunc fill_solid;
FillHalfplaneTileFunc fill_halfplane;
FillGenericTileFunc fill_generic;
#endif
// blend functions
BitmapBlendFunc add_bitmaps, sub_bitmaps;
BitmapMulFunc mul_bitmaps;
// be blur function
BeBlurFunc be_blur;
} BitmapEngine;
extern const BitmapEngine ass_bitmap_engine_c;
extern const BitmapEngine ass_bitmap_engine_sse2;
extern const BitmapEngine ass_bitmap_engine_avx2;
typedef struct {
size_t n_contours, max_contours;
size_t *contours;
size_t n_points, max_points;
FT_Vector *points;
char *tags;
} ASS_Outline;
#define EFFICIENT_CONTOUR_COUNT 8
typedef struct {
int left, top;
int w, h; // width, height
int stride;
unsigned char *buffer; // h * stride buffer
} Bitmap;
Bitmap *alloc_bitmap(const BitmapEngine *engine, int w, int h);
Bitmap *copy_bitmap(const BitmapEngine *engine, const Bitmap *src);
void ass_free_bitmap(Bitmap *bm);
Bitmap *outline_to_bitmap(ASS_Renderer *render_priv,
ASS_Outline *outline, int bord);
void ass_synth_blur(const BitmapEngine *engine,
ASS_SynthPriv *priv_blur, int opaque_box, int be,
double blur_radius, Bitmap *bm_g, Bitmap *bm_o);
/**
* \brief perform glyph rendering
* \param outline original glyph
* \param border "border" glyph, produced from outline by FreeType's glyph stroker
* \param bm_g out: pointer to the bitmap of original glyph is returned here
* \param bm_o out: pointer to the bitmap of border glyph is returned here
*/
int outline_to_bitmap2(ASS_Renderer *render_priv,
ASS_Outline *outline, ASS_Outline *border,
Bitmap **bm_g, Bitmap **bm_o);
void ass_gauss_blur(unsigned char *buffer, unsigned *tmp2,
int width, int height, int stride,
unsigned *m2, int r, int mwidth);
int be_padding(int be);
void be_blur_pre(uint8_t *buf, intptr_t w,
intptr_t h, intptr_t stride);
void be_blur_post(uint8_t *buf, intptr_t w,
intptr_t h, intptr_t stride);
void shift_bitmap(Bitmap *bm, int shift_x, int shift_y);
void fix_outline(Bitmap *bm_g, Bitmap *bm_o);
#endif /* LIBASS_BITMAP_H */
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