libavfilter/drawutils.h

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/*
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#ifndef AVFILTER_DRAWUTILS_H
#define AVFILTER_DRAWUTILS_H

#include <stdint.h>
#include "avfilter.h"
#include "libavutil/pixfmt.h"

int ff_fill_rgba_map(uint8_t *rgba_map, enum PixelFormat pix_fmt);

int ff_fill_line_with_color(uint8_t *line[4], int pixel_step[4], int w,
                            uint8_t dst_color[4],
                            enum PixelFormat pix_fmt, uint8_t rgba_color[4],
                            int *is_packed_rgba, uint8_t rgba_map[4]);

void ff_draw_rectangle(uint8_t *dst[4], int dst_linesize[4],
                       uint8_t *src[4], int pixelstep[4],
                       int hsub, int vsub, int x, int y, int w, int h);

void ff_copy_rectangle(uint8_t *dst[4], int dst_linesize[4],
                       uint8_t *src[4], int src_linesize[4], int pixelstep[4],
                       int hsub, int vsub, int x, int y, int y2, int w, int h);

#define MAX_PLANES 4

typedef struct FFDrawContext {
    const struct AVPixFmtDescriptor *desc;
    enum PixelFormat format;
    unsigned nb_planes;
    int pixelstep[MAX_PLANES]; /*< offset between pixels */
    uint8_t comp_mask[MAX_PLANES]; /*< bitmask of used non-alpha components */
    uint8_t hsub[MAX_PLANES];  /*< horizontal subsamling */
    uint8_t vsub[MAX_PLANES];  /*< vertical subsamling */
    uint8_t hsub_max;
    uint8_t vsub_max;
} FFDrawContext;

typedef struct FFDrawColor {
    uint8_t rgba[4];
    union {
        uint32_t u32;
        uint16_t u16;
        uint8_t  u8[4];
    } comp[MAX_PLANES];
} FFDrawColor;

int ff_draw_init(FFDrawContext *draw, enum PixelFormat format, unsigned flags);

void ff_draw_color(FFDrawContext *draw, FFDrawColor *color, const uint8_t rgba[4]);

void ff_copy_rectangle2(FFDrawContext *draw,
                        uint8_t *dst[], int dst_linesize[],
                        uint8_t *src[], int src_linesize[],
                        int dst_x, int dst_y, int src_x, int src_y,
                        int w, int h);

void ff_fill_rectangle(FFDrawContext *draw, FFDrawColor *color,
                       uint8_t *dst[], int dst_linesize[],
                       int dst_x, int dst_y, int w, int h);

void ff_blend_rectangle(FFDrawContext *draw, FFDrawColor *color,
                        uint8_t *dst[], int dst_linesize[],
                        int dst_w, int dst_h,
                        int x0, int y0, int w, int h);

void ff_blend_mask(FFDrawContext *draw, FFDrawColor *color,
                   uint8_t *dst[], int dst_linesize[], int dst_w, int dst_h,
                   uint8_t *mask, int mask_linesize, int mask_w, int mask_h,
                   int l2depth, unsigned endianness, int x0, int y0);

int ff_draw_round_to_sub(FFDrawContext *draw, int sub_dir, int round_dir,
                         int value);

AVFilterFormats *ff_draw_supported_pixel_formats(unsigned flags);

#endif /* AVFILTER_DRAWUTILS_H */

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