yading@10: /* yading@10: * This file is part of FFmpeg. yading@10: * yading@10: * FFmpeg is free software; you can redistribute it and/or yading@10: * modify it under the terms of the GNU Lesser General Public yading@10: * License as published by the Free Software Foundation; either yading@10: * version 2.1 of the License, or (at your option) any later version. yading@10: * yading@10: * FFmpeg is distributed in the hope that it will be useful, yading@10: * but WITHOUT ANY WARRANTY; without even the implied warranty of yading@10: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU yading@10: * Lesser General Public License for more details. yading@10: * yading@10: * You should have received a copy of the GNU Lesser General Public yading@10: * License along with FFmpeg; if not, write to the Free Software yading@10: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA yading@10: */ yading@10: yading@10: #ifndef AVFILTER_DRAWUTILS_H yading@10: #define AVFILTER_DRAWUTILS_H yading@10: yading@10: /** yading@10: * @file yading@10: * misc drawing utilities yading@10: */ yading@10: yading@10: #include yading@10: #include "avfilter.h" yading@10: #include "libavutil/pixfmt.h" yading@10: yading@10: int ff_fill_rgba_map(uint8_t *rgba_map, enum AVPixelFormat pix_fmt); yading@10: yading@10: int ff_fill_line_with_color(uint8_t *line[4], int pixel_step[4], int w, yading@10: uint8_t dst_color[4], yading@10: enum AVPixelFormat pix_fmt, uint8_t rgba_color[4], yading@10: int *is_packed_rgba, uint8_t rgba_map[4]); yading@10: yading@10: void ff_draw_rectangle(uint8_t *dst[4], int dst_linesize[4], yading@10: uint8_t *src[4], int pixelstep[4], yading@10: int hsub, int vsub, int x, int y, int w, int h); yading@10: yading@10: void ff_copy_rectangle(uint8_t *dst[4], int dst_linesize[4], yading@10: uint8_t *src[4], int src_linesize[4], int pixelstep[4], yading@10: int hsub, int vsub, int x, int y, int y2, int w, int h); yading@10: yading@10: #define MAX_PLANES 4 yading@10: yading@10: typedef struct FFDrawContext { yading@10: const struct AVPixFmtDescriptor *desc; yading@10: enum AVPixelFormat format; yading@10: unsigned nb_planes; yading@10: int pixelstep[MAX_PLANES]; /*< offset between pixels */ yading@10: uint8_t comp_mask[MAX_PLANES]; /*< bitmask of used non-alpha components */ yading@10: uint8_t hsub[MAX_PLANES]; /*< horizontal subsampling */ yading@10: uint8_t vsub[MAX_PLANES]; /*< vertical subsampling */ yading@10: uint8_t hsub_max; yading@10: uint8_t vsub_max; yading@10: } FFDrawContext; yading@10: yading@10: typedef struct FFDrawColor { yading@10: uint8_t rgba[4]; yading@10: union { yading@10: uint32_t u32; yading@10: uint16_t u16; yading@10: uint8_t u8[4]; yading@10: } comp[MAX_PLANES]; yading@10: } FFDrawColor; yading@10: yading@10: /** yading@10: * Init a draw context. yading@10: * yading@10: * Only a limited number of pixel formats are supported, if format is not yading@10: * supported the function will return an error. yading@10: * No flags currently defined. yading@10: * @return 0 for success, < 0 for error yading@10: */ yading@10: int ff_draw_init(FFDrawContext *draw, enum AVPixelFormat format, unsigned flags); yading@10: yading@10: /** yading@10: * Prepare a color. yading@10: */ yading@10: void ff_draw_color(FFDrawContext *draw, FFDrawColor *color, const uint8_t rgba[4]); yading@10: yading@10: /** yading@10: * Copy a rectangle from an image to another. yading@10: * yading@10: * The coordinates must be as even as the subsampling requires. yading@10: */ yading@10: void ff_copy_rectangle2(FFDrawContext *draw, yading@10: uint8_t *dst[], int dst_linesize[], yading@10: uint8_t *src[], int src_linesize[], yading@10: int dst_x, int dst_y, int src_x, int src_y, yading@10: int w, int h); yading@10: yading@10: /** yading@10: * Fill a rectangle with an uniform color. yading@10: * yading@10: * The coordinates must be as even as the subsampling requires. yading@10: * The color needs to be inited with ff_draw_color. yading@10: */ yading@10: void ff_fill_rectangle(FFDrawContext *draw, FFDrawColor *color, yading@10: uint8_t *dst[], int dst_linesize[], yading@10: int dst_x, int dst_y, int w, int h); yading@10: yading@10: /** yading@10: * Blend a rectangle with an uniform color. yading@10: */ yading@10: void ff_blend_rectangle(FFDrawContext *draw, FFDrawColor *color, yading@10: uint8_t *dst[], int dst_linesize[], yading@10: int dst_w, int dst_h, yading@10: int x0, int y0, int w, int h); yading@10: yading@10: /** yading@10: * Blend an alpha mask with an uniform color. yading@10: * yading@10: * @param draw draw context yading@10: * @param color color for the overlay; yading@10: * @param dst destination image yading@10: * @param dst_linesize line stride of the destination yading@10: * @param dst_w width of the destination image yading@10: * @param dst_h height of the destination image yading@10: * @param mask mask yading@10: * @param mask_linesize line stride of the mask yading@10: * @param mask_w width of the mask yading@10: * @param mask_h height of the mask yading@10: * @param l2depth log2 of depth of the mask (0 for 1bpp, 3 for 8bpp) yading@10: * @param endianness bit order of the mask (0: MSB to the left) yading@10: * @param x0 horizontal position of the overlay yading@10: * @param y0 vertical position of the overlay yading@10: */ yading@10: void ff_blend_mask(FFDrawContext *draw, FFDrawColor *color, yading@10: uint8_t *dst[], int dst_linesize[], int dst_w, int dst_h, yading@10: uint8_t *mask, int mask_linesize, int mask_w, int mask_h, yading@10: int l2depth, unsigned endianness, int x0, int y0); yading@10: yading@10: /** yading@10: * Round a dimension according to subsampling. yading@10: * yading@10: * @param draw draw context yading@10: * @param sub_dir 0 for horizontal, 1 for vertical yading@10: * @param round_dir 0 nearest, -1 round down, +1 round up yading@10: * @param value value to round yading@10: * @return the rounded value yading@10: */ yading@10: int ff_draw_round_to_sub(FFDrawContext *draw, int sub_dir, int round_dir, yading@10: int value); yading@10: yading@10: /** yading@10: * Return the list of pixel formats supported by the draw functions. yading@10: * yading@10: * The flags are the same as ff_draw_init, i.e., none currently. yading@10: */ yading@10: AVFilterFormats *ff_draw_supported_pixel_formats(unsigned flags); yading@10: yading@10: #endif /* AVFILTER_DRAWUTILS_H */