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| Rev | Author | Line No. | Line |
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| 4349 | Serge | 1 | /* |
| 2 | * This file is part of FFmpeg. |
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| 3 | * |
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| 4 | * FFmpeg is free software; you can redistribute it and/or |
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| 5 | * modify it under the terms of the GNU Lesser General Public |
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| 6 | * License as published by the Free Software Foundation; either |
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| 7 | * version 2.1 of the License, or (at your option) any later version. |
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| 8 | * |
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| 9 | * FFmpeg is distributed in the hope that it will be useful, |
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| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 12 | * Lesser General Public License for more details. |
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| 13 | * |
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| 14 | * You should have received a copy of the GNU Lesser General Public |
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| 15 | * License along with FFmpeg; if not, write to the Free Software |
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| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 17 | */ |
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| 18 | |||
| 19 | #ifndef AVFILTER_DRAWUTILS_H |
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| 20 | #define AVFILTER_DRAWUTILS_H |
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| 21 | |||
| 22 | /** |
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| 23 | * @file |
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| 24 | * misc drawing utilities |
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| 25 | */ |
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| 26 | |||
| 27 | #include |
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| 28 | #include "avfilter.h" |
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| 29 | #include "libavutil/pixfmt.h" |
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| 30 | |||
| 31 | int ff_fill_rgba_map(uint8_t *rgba_map, enum AVPixelFormat pix_fmt); |
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| 32 | |||
| 33 | int ff_fill_line_with_color(uint8_t *line[4], int pixel_step[4], int w, |
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| 34 | uint8_t dst_color[4], |
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| 35 | enum AVPixelFormat pix_fmt, uint8_t rgba_color[4], |
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| 36 | int *is_packed_rgba, uint8_t rgba_map[4]); |
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| 37 | |||
| 38 | void ff_draw_rectangle(uint8_t *dst[4], int dst_linesize[4], |
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| 39 | uint8_t *src[4], int pixelstep[4], |
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| 40 | int hsub, int vsub, int x, int y, int w, int h); |
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| 41 | |||
| 42 | void ff_copy_rectangle(uint8_t *dst[4], int dst_linesize[4], |
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| 43 | uint8_t *src[4], int src_linesize[4], int pixelstep[4], |
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| 44 | int hsub, int vsub, int x, int y, int y2, int w, int h); |
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| 45 | |||
| 46 | #define MAX_PLANES 4 |
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| 47 | |||
| 48 | typedef struct FFDrawContext { |
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| 49 | const struct AVPixFmtDescriptor *desc; |
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| 50 | enum AVPixelFormat format; |
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| 51 | unsigned nb_planes; |
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| 52 | int pixelstep[MAX_PLANES]; /*< offset between pixels */ |
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| 53 | uint8_t comp_mask[MAX_PLANES]; /*< bitmask of used non-alpha components */ |
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| 54 | uint8_t hsub[MAX_PLANES]; /*< horizontal subsampling */ |
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| 55 | uint8_t vsub[MAX_PLANES]; /*< vertical subsampling */ |
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| 56 | uint8_t hsub_max; |
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| 57 | uint8_t vsub_max; |
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| 58 | } FFDrawContext; |
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| 59 | |||
| 60 | typedef struct FFDrawColor { |
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| 61 | uint8_t rgba[4]; |
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| 62 | union { |
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| 63 | uint32_t u32; |
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| 64 | uint16_t u16; |
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| 65 | uint8_t u8[4]; |
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| 66 | } comp[MAX_PLANES]; |
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| 67 | } FFDrawColor; |
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| 68 | |||
| 69 | /** |
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| 70 | * Init a draw context. |
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| 71 | * |
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| 72 | * Only a limited number of pixel formats are supported, if format is not |
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| 73 | * supported the function will return an error. |
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| 74 | * No flags currently defined. |
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| 75 | * @return 0 for success, < 0 for error |
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| 76 | */ |
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| 77 | int ff_draw_init(FFDrawContext *draw, enum AVPixelFormat format, unsigned flags); |
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| 78 | |||
| 79 | /** |
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| 80 | * Prepare a color. |
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| 81 | */ |
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| 82 | void ff_draw_color(FFDrawContext *draw, FFDrawColor *color, const uint8_t rgba[4]); |
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| 83 | |||
| 84 | /** |
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| 85 | * Copy a rectangle from an image to another. |
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| 86 | * |
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| 87 | * The coordinates must be as even as the subsampling requires. |
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| 88 | */ |
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| 89 | void ff_copy_rectangle2(FFDrawContext *draw, |
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| 90 | uint8_t *dst[], int dst_linesize[], |
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| 91 | uint8_t *src[], int src_linesize[], |
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| 92 | int dst_x, int dst_y, int src_x, int src_y, |
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| 93 | int w, int h); |
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| 94 | |||
| 95 | /** |
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| 96 | * Fill a rectangle with an uniform color. |
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| 97 | * |
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| 98 | * The coordinates must be as even as the subsampling requires. |
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| 99 | * The color needs to be inited with ff_draw_color. |
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| 100 | */ |
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| 101 | void ff_fill_rectangle(FFDrawContext *draw, FFDrawColor *color, |
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| 102 | uint8_t *dst[], int dst_linesize[], |
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| 103 | int dst_x, int dst_y, int w, int h); |
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| 104 | |||
| 105 | /** |
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| 106 | * Blend a rectangle with an uniform color. |
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| 107 | */ |
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| 108 | void ff_blend_rectangle(FFDrawContext *draw, FFDrawColor *color, |
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| 109 | uint8_t *dst[], int dst_linesize[], |
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| 110 | int dst_w, int dst_h, |
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| 111 | int x0, int y0, int w, int h); |
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| 112 | |||
| 113 | /** |
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| 114 | * Blend an alpha mask with an uniform color. |
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| 115 | * |
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| 116 | * @param draw draw context |
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| 117 | * @param color color for the overlay; |
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| 118 | * @param dst destination image |
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| 119 | * @param dst_linesize line stride of the destination |
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| 120 | * @param dst_w width of the destination image |
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| 121 | * @param dst_h height of the destination image |
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| 122 | * @param mask mask |
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| 123 | * @param mask_linesize line stride of the mask |
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| 124 | * @param mask_w width of the mask |
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| 125 | * @param mask_h height of the mask |
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| 126 | * @param l2depth log2 of depth of the mask (0 for 1bpp, 3 for 8bpp) |
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| 127 | * @param endianness bit order of the mask (0: MSB to the left) |
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| 128 | * @param x0 horizontal position of the overlay |
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| 129 | * @param y0 vertical position of the overlay |
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| 130 | */ |
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| 131 | void ff_blend_mask(FFDrawContext *draw, FFDrawColor *color, |
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| 132 | uint8_t *dst[], int dst_linesize[], int dst_w, int dst_h, |
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| 133 | uint8_t *mask, int mask_linesize, int mask_w, int mask_h, |
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| 134 | int l2depth, unsigned endianness, int x0, int y0); |
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| 135 | |||
| 136 | /** |
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| 137 | * Round a dimension according to subsampling. |
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| 138 | * |
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| 139 | * @param draw draw context |
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| 140 | * @param sub_dir 0 for horizontal, 1 for vertical |
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| 141 | * @param round_dir 0 nearest, -1 round down, +1 round up |
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| 142 | * @param value value to round |
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| 143 | * @return the rounded value |
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| 144 | */ |
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| 145 | int ff_draw_round_to_sub(FFDrawContext *draw, int sub_dir, int round_dir, |
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| 146 | int value); |
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| 147 | |||
| 148 | /** |
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| 149 | * Return the list of pixel formats supported by the draw functions. |
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| 150 | * |
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| 151 | * The flags are the same as ff_draw_init, i.e., none currently. |
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| 152 | */ |
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| 153 | AVFilterFormats *ff_draw_supported_pixel_formats(unsigned flags); |
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| 154 | |||
| 155 | #endif /* AVFILTER_DRAWUTILS_H */ |