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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
- /**
- * @file
- * misc drawing utilities
- */
- #include <stdint.h>
- #include "avfilter.h"
- #include "libavutil/pixfmt.h"
- int ff_fill_rgba_map(uint8_t *rgba_map, enum AVPixelFormat pix_fmt);
- int ff_fill_line_with_color(uint8_t *line[4], int pixel_step[4], int w,
- uint8_t dst_color[4],
- enum AVPixelFormat 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 AVPixelFormat 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 subsampling */
- uint8_t vsub[MAX_PLANES]; /*< vertical subsampling */
- 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;
- /**
- * Init a draw context.
- *
- * Only a limited number of pixel formats are supported, if format is not
- * supported the function will return an error.
- * No flags currently defined.
- * @return 0 for success, < 0 for error
- */
- int ff_draw_init(FFDrawContext *draw, enum AVPixelFormat format, unsigned flags);
- /**
- * Prepare a color.
- */
- void ff_draw_color(FFDrawContext *draw, FFDrawColor *color, const uint8_t rgba[4]);
- /**
- * Copy a rectangle from an image to another.
- *
- * The coordinates must be as even as the subsampling requires.
- */
- 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);
- /**
- * Fill a rectangle with an uniform color.
- *
- * The coordinates must be as even as the subsampling requires.
- * The color needs to be inited with ff_draw_color.
- */
- void ff_fill_rectangle(FFDrawContext *draw, FFDrawColor *color,
- uint8_t *dst[], int dst_linesize[],
- int dst_x, int dst_y, int w, int h);
- /**
- * Blend a rectangle with an uniform color.
- */
- 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);
- /**
- * Blend an alpha mask with an uniform color.
- *
- * @param draw draw context
- * @param color color for the overlay;
- * @param dst destination image
- * @param dst_linesize line stride of the destination
- * @param dst_w width of the destination image
- * @param dst_h height of the destination image
- * @param mask mask
- * @param mask_linesize line stride of the mask
- * @param mask_w width of the mask
- * @param mask_h height of the mask
- * @param l2depth log2 of depth of the mask (0 for 1bpp, 3 for 8bpp)
- * @param endianness bit order of the mask (0: MSB to the left)
- * @param x0 horizontal position of the overlay
- * @param y0 vertical position of the overlay
- */
- void ff_blend_mask(FFDrawContext *draw, FFDrawColor *color,
- uint8_t *dst[], int dst_linesize[], int dst_w, int dst_h,
- const uint8_t *mask, int mask_linesize, int mask_w, int mask_h,
- int l2depth, unsigned endianness, int x0, int y0);
- /**
- * Round a dimension according to subsampling.
- *
- * @param draw draw context
- * @param sub_dir 0 for horizontal, 1 for vertical
- * @param round_dir 0 nearest, -1 round down, +1 round up
- * @param value value to round
- * @return the rounded value
- */
- int ff_draw_round_to_sub(FFDrawContext *draw, int sub_dir, int round_dir,
- int value);
- /**
- * Return the list of pixel formats supported by the draw functions.
- *
- * The flags are the same as ff_draw_init, i.e., none currently.
- */
- AVFilterFormats *ff_draw_supported_pixel_formats(unsigned flags);
- #endif /* AVFILTER_DRAWUTILS_H */
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