| Dzmitry Sankouski | aea2d2d | 2023-03-07 13:21:11 +0300 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0+ */ |
| 2 | /* |
| 3 | * Copyright (c) 2015 Google, Inc |
| 4 | * (C) Copyright 2015 |
| 5 | * Bernecker & Rainer Industrieelektronik GmbH - http://www.br-automation.com |
| 6 | * (C) Copyright 2023 Dzmitry Sankouski <dsankouski@gmail.com> |
| 7 | */ |
| 8 | |
| 9 | #include <video_font.h> /* Get font data, width and height */ |
| 10 | |
| 11 | #define VIDEO_FONT_BYTE_WIDTH ((VIDEO_FONT_WIDTH / 8) + (VIDEO_FONT_WIDTH % 8 > 0)) |
| 12 | |
| 13 | #define FLIPPED_DIRECTION 1 |
| 14 | #define NORMAL_DIRECTION 0 |
| 15 | |
| 16 | /** |
| 17 | * Checks if bits per pixel supported. |
| 18 | * |
| 19 | * @param bpix framebuffer bits per pixel. |
| 20 | * |
| 21 | * @returns 0, if supported, or else -ENOSYS. |
| 22 | */ |
| 23 | int check_bpix_support(int bpix); |
| 24 | |
| 25 | /** |
| 26 | * Fill 1 pixel in framebuffer, and go to next one. |
| 27 | * |
| 28 | * @param dstp a pointer to pointer to framebuffer. |
| 29 | * @param value value to write to framebuffer. |
| 30 | * @param pbytes framebuffer bytes per pixel. |
| 31 | * @param step framebuffer pointer increment. Usually is equal to pbytes, |
| 32 | * and may be negative to control filling direction. |
| 33 | */ |
| 34 | void fill_pixel_and_goto_next(void **dstp, u32 value, int pbytes, int step); |
| 35 | |
| 36 | /** |
| 37 | * Fills 1 character in framebuffer vertically. Vertically means we're filling char font data rows |
| 38 | * across the lines. |
| 39 | * |
| 40 | * @param pfont a pointer to character font data. |
| 41 | * @param line a pointer to pointer to framebuffer. It's a point for upper left char corner |
| 42 | * @param vid_priv driver private data. |
| 43 | * @param direction controls character orientation. Can be normal or flipped. |
| 44 | * When normal: When flipped: |
| 45 | *|-----------------------------------------------| |
| 46 | *| line stepping | | |
| 47 | *| | | stepping -> | |
| 48 | *| * | | * * * | |
| 49 | *| * * v | * | |
| 50 | *| * | * | |
| 51 | *| * | * * ^ | |
| 52 | *| * * * | * | | |
| 53 | *| | | | |
| 54 | *| stepping -> | line stepping | |
| 55 | *|---!!we're starting from upper left char corner| |
| 56 | *|-----------------------------------------------| |
| 57 | * |
| 58 | * @returns 0, if success, or else error code. |
| 59 | */ |
| 60 | int fill_char_vertically(uchar *pfont, void **line, struct video_priv *vid_priv, |
| 61 | bool direction); |
| 62 | |
| 63 | /** |
| 64 | * Fills 1 character in framebuffer horizontally. |
| 65 | * Horizontally means we're filling char font data columns across the lines. |
| 66 | * |
| 67 | * @param pfont a pointer to character font data. |
| 68 | * @param line a pointer to pointer to framebuffer. It's a point for upper left char corner |
| 69 | * @param vid_priv driver private data. |
| 70 | * @param direction controls character orientation. Can be normal or flipped. |
| 71 | * When normal: When flipped: |
| 72 | *|-----------------------------------------------| |
| 73 | *| * | line stepping | |
| 74 | *| ^ * * * * * | | | |
| 75 | *| | * * | v * * | |
| 76 | *| | | * * * * * | |
| 77 | *| line stepping | * | |
| 78 | *| | | |
| 79 | *| stepping -> | <- stepping | |
| 80 | *|---!!we're starting from upper left char corner| |
| 81 | *|-----------------------------------------------| |
| 82 | * |
| 83 | * @returns 0, if success, or else error code. |
| 84 | */ |
| 85 | int fill_char_horizontally(uchar *pfont, void **line, struct video_priv *vid_priv, |
| 86 | bool direction); |
| 87 | |
| 88 | /** |
| 89 | * console probe function. |
| 90 | * |
| 91 | * @param dev a pointer to device. |
| 92 | * |
| 93 | * @returns 0, if success, or else error code. |
| 94 | */ |
| 95 | int console_probe(struct udevice *dev); |