[64554] | 1 | /* $Id: DBGCScreenAscii.cpp 99739 2023-05-11 01:01:08Z vboxsync $ */
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| 2 | /** @file
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| 3 | * DBGC - Debugger Console, ASCII screen with optional coloring support.
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| 4 | */
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| 5 |
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| 6 | /*
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[98103] | 7 | * Copyright (C) 2016-2023 Oracle and/or its affiliates.
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[64554] | 8 | *
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[96407] | 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.virtualbox.org.
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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| 25 | * SPDX-License-Identifier: GPL-3.0-only
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[64554] | 26 | */
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| 27 |
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| 28 |
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| 29 | /*********************************************************************************************************************************
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| 30 | * Header Files *
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| 31 | *********************************************************************************************************************************/
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| 32 | #define LOG_GROUP LOG_GROUP_DBGC
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| 33 | #include <VBox/err.h>
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| 34 | #include <VBox/log.h>
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| 35 |
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| 36 | #include <iprt/mem.h>
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| 37 | #include <iprt/string.h>
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| 38 |
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| 39 | #include "DBGCInternal.h"
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| 40 |
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[69285] | 41 |
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[64554] | 42 | /*********************************************************************************************************************************
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| 43 | * Defined Constants And Macros *
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| 44 | *********************************************************************************************************************************/
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| 45 |
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| 46 |
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| 47 |
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| 48 | /*********************************************************************************************************************************
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| 49 | * Structures and Typedefs *
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| 50 | *********************************************************************************************************************************/
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| 51 |
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| 52 | /**
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| 53 | * Debug console ASCII screen.
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| 54 | */
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| 55 | typedef struct DBGCSCREENINT
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| 56 | {
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| 57 | /** Width of the screen. */
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| 58 | uint32_t cchWidth;
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| 59 | /** Height of the screen. */
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| 60 | uint32_t cchHeight;
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| 61 | /** Extra amount of characters at the end of each line (usually terminator). */
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| 62 | uint32_t cchStride;
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| 63 | /** Pointer to the char buffer. */
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| 64 | char *pszScreen;
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| 65 | /** Color information for each pixel. */
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| 66 | PDBGCSCREENCOLOR paColors;
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| 67 | } DBGCSCREENINT;
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| 68 | /** Pointer to an ASCII screen. */
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| 69 | typedef DBGCSCREENINT *PDBGCSCREENINT;
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| 70 |
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| 71 |
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| 72 | /*********************************************************************************************************************************
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| 73 | * Internal Functions *
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| 74 | *********************************************************************************************************************************/
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| 75 |
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| 76 |
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| 77 | /**
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| 78 | * Returns the buffer starting at the given position.
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| 79 | *
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| 80 | * @returns Pointer to the ASCII buffer.
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| 81 | * @param pThis The screen.
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| 82 | * @param uX Horizontal position.
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| 83 | * @param uY Vertical position.
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| 84 | */
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| 85 | DECLINLINE(char *) dbgcScreenAsciiGetBufferAtPos(PDBGCSCREENINT pThis, uint32_t uX, uint32_t uY)
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| 86 | {
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| 87 | AssertReturn(uX < pThis->cchWidth && uY < pThis->cchHeight, NULL);
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| 88 | return pThis->pszScreen + (pThis->cchWidth + pThis->cchStride) * uY + uX;
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| 89 | }
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| 90 |
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| 91 |
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| 92 | /**
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| 93 | * Returns the color buffer starting at the given position.
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| 94 | *
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| 95 | * @returns Pointer to the color buffer.
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| 96 | * @param pThis The screen.
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| 97 | * @param uX Horizontal position.
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| 98 | * @param uY Vertical position.
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| 99 | */
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| 100 | DECLINLINE(PDBGCSCREENCOLOR) dbgcScreenAsciiGetColorBufferAtPos(PDBGCSCREENINT pThis, uint32_t uX, uint32_t uY)
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| 101 | {
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| 102 | AssertReturn(uX < pThis->cchWidth && uY < pThis->cchHeight, NULL);
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| 103 | return &pThis->paColors[pThis->cchWidth * uY + uX];
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| 104 | }
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| 105 |
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| 106 |
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| 107 | /**
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| 108 | * Converts the given color the correct escape sequence.
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| 109 | *
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| 110 | * @returns Pointer to the string containing the escape sequence for the given color.
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| 111 | * @param enmColor The color.
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| 112 | */
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| 113 | static const char *dbgcScreenAsciiColorToEscapeSeq(DBGCSCREENCOLOR enmColor)
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| 114 | {
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| 115 | const char *psz = NULL;
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| 116 |
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| 117 | switch (enmColor)
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| 118 | {
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| 119 | case DBGCSCREENCOLOR_DEFAULT:
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| 120 | psz = "\033[0m";
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| 121 | break;
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| 122 | case DBGCSCREENCOLOR_BLACK:
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| 123 | psz = "\033[30m";
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| 124 | break;
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| 125 | case DBGCSCREENCOLOR_BLACK_BRIGHT:
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| 126 | psz = "\033[30;1m";
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| 127 | break;
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| 128 | case DBGCSCREENCOLOR_RED:
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| 129 | psz = "\033[31m";
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| 130 | break;
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| 131 | case DBGCSCREENCOLOR_RED_BRIGHT:
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| 132 | psz = "\033[31;1m";
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| 133 | break;
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| 134 | case DBGCSCREENCOLOR_GREEN:
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| 135 | psz = "\033[32m";
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| 136 | break;
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| 137 | case DBGCSCREENCOLOR_GREEN_BRIGHT:
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| 138 | psz = "\033[32;1m";
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| 139 | break;
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| 140 | case DBGCSCREENCOLOR_YELLOW:
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| 141 | psz = "\033[33m";
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| 142 | break;
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| 143 | case DBGCSCREENCOLOR_YELLOW_BRIGHT:
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| 144 | psz = "\033[33;1m";
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| 145 | break;
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| 146 | case DBGCSCREENCOLOR_BLUE:
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| 147 | psz = "\033[34m";
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| 148 | break;
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| 149 | case DBGCSCREENCOLOR_BLUE_BRIGHT:
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| 150 | psz = "\033[34;1m";
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| 151 | break;
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| 152 | case DBGCSCREENCOLOR_MAGENTA:
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| 153 | psz = "\033[35m";
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| 154 | break;
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| 155 | case DBGCSCREENCOLOR_MAGENTA_BRIGHT:
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| 156 | psz = "\033[35;1m";
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| 157 | break;
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| 158 | case DBGCSCREENCOLOR_CYAN:
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| 159 | psz = "\033[36m";
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| 160 | break;
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| 161 | case DBGCSCREENCOLOR_CYAN_BRIGHT:
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| 162 | psz = "\033[36;1m";
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| 163 | break;
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| 164 | case DBGCSCREENCOLOR_WHITE:
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| 165 | psz = "\033[37m";
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| 166 | break;
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| 167 | case DBGCSCREENCOLOR_WHITE_BRIGHT:
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| 168 | psz = "\033[37;1m";
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| 169 | break;
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| 170 | default:
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| 171 | AssertFailed();
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| 172 | }
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| 173 |
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| 174 | return psz;
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| 175 | }
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| 176 |
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| 177 |
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| 178 | /**
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| 179 | * Creates a new ASCII screen for layouting.
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| 180 | *
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| 181 | * @returns VBox status code.
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| 182 | * @param phScreen Where to store the handle to the screen instance on success.
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| 183 | * @param cchWidth Width of the screen in characters.
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| 184 | * @param cchHeight Height of the screen in characters.
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| 185 | */
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| 186 | DECLHIDDEN(int) dbgcScreenAsciiCreate(PDBGCSCREEN phScreen, uint32_t cchWidth, uint32_t cchHeight)
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| 187 | {
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| 188 | int rc = VINF_SUCCESS;
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| 189 |
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| 190 | PDBGCSCREENINT pThis = (PDBGCSCREENINT)RTMemAllocZ(sizeof(DBGCSCREENINT));
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| 191 | if (pThis)
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| 192 | {
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| 193 | pThis->cchWidth = cchWidth;
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| 194 | pThis->cchHeight = cchHeight;
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| 195 | pThis->cchStride = 1; /* Zero terminators after every line. */
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| 196 | pThis->pszScreen = RTStrAlloc((cchWidth + 1) * cchHeight * sizeof(char));
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| 197 | if (RT_LIKELY(pThis->pszScreen))
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| 198 | {
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[64576] | 199 | pThis->paColors = (PDBGCSCREENCOLOR)RTMemAllocZ(cchWidth * cchHeight * sizeof(DBGCSCREENCOLOR));
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| 200 | if (RT_LIKELY(pThis->paColors))
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| 201 | {
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[64554] | 202 | memset(pThis->pszScreen, 0, (cchWidth + 1) * cchHeight * sizeof(char));
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| 203 | /* Initialize the screen with spaces. */
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| 204 | for (uint32_t i = 0; i < cchHeight; i++)
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| 205 | dbgcScreenAsciiDrawLineHorizontal(pThis, 0, cchWidth - 1, i, ' ',
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| 206 | DBGCSCREENCOLOR_DEFAULT);
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| 207 | *phScreen = pThis;
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[64576] | 208 | }
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[64554] | 209 | else
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| 210 | rc = VERR_NO_MEMORY;
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| 211 |
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| 212 | if (RT_FAILURE(rc))
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| 213 | RTStrFree(pThis->pszScreen);
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[64576] | 214 | }
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[64554] | 215 | else
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| 216 | rc = VERR_NO_STR_MEMORY;
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| 217 |
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| 218 | if (RT_FAILURE(rc))
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| 219 | RTMemFree(pThis);
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| 220 | }
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| 221 | else
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| 222 | rc = VERR_NO_MEMORY;
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| 223 |
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| 224 | return rc;
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| 225 | }
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| 226 |
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| 227 |
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| 228 | /**
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| 229 | * Destroys a given ASCII screen.
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| 230 | *
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| 231 | * @param hScreen The screen handle.
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| 232 | */
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| 233 | DECLHIDDEN(void) dbgcScreenAsciiDestroy(DBGCSCREEN hScreen)
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| 234 | {
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| 235 | PDBGCSCREENINT pThis = hScreen;
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| 236 | AssertPtrReturnVoid(pThis);
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| 237 |
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| 238 | RTStrFree(pThis->pszScreen);
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| 239 | RTMemFree(pThis->paColors);
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| 240 | RTMemFree(pThis);
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| 241 | }
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| 242 |
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| 243 |
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| 244 | /**
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| 245 | * Blits the entire screen using the given callback callback.
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| 246 | *
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| 247 | * @returns VBox status code.
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[65118] | 248 | * @param hScreen The screen to blit.
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[64554] | 249 | * @param pfnBlit Blitting callback.
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| 250 | * @param pvUser Opaque user data to pass to the dumper callback.
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| 251 | * @param fAddColors Flag whether to use the color info inserting
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[69285] | 252 | * appropriate escape sequences.
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[64554] | 253 | */
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| 254 | DECLHIDDEN(int) dbgcScreenAsciiBlit(DBGCSCREEN hScreen, PFNDGCSCREENBLIT pfnBlit, void *pvUser, bool fAddColors)
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| 255 | {
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| 256 | int rc = VINF_SUCCESS;
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| 257 | PDBGCSCREENINT pThis = hScreen;
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| 258 | AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
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| 259 |
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| 260 | if (!fAddColors)
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| 261 | {
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| 262 | for (uint32_t iY = 0; iY < pThis->cchHeight && RT_SUCCESS(rc); iY++)
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| 263 | {
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| 264 | /* Play safe and restore line endings. */
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| 265 | char *psz = dbgcScreenAsciiGetBufferAtPos(pThis, 0, iY);
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| 266 | psz[pThis->cchWidth] = '\0';
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| 267 | rc = pfnBlit(psz, pvUser);
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| 268 | if (RT_SUCCESS(rc))
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| 269 | rc = pfnBlit("\n", pvUser);
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| 270 | }
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| 271 | }
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| 272 | else
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| 273 | {
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| 274 | for (uint32_t iY = 0; iY < pThis->cchHeight && RT_SUCCESS(rc); iY++)
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| 275 | {
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| 276 | /* Play safe and restore line endings. */
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| 277 | char *psz = dbgcScreenAsciiGetBufferAtPos(pThis, 0, iY);
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| 278 | PDBGCSCREENCOLOR pColor = dbgcScreenAsciiGetColorBufferAtPos(pThis, 0, iY);
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| 279 | psz[pThis->cchWidth] = '\0';
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| 280 |
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| 281 | /*
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| 282 | * Blit only stuff with the same color at once so to be able to inject the
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| 283 | * correct color escape sequences.
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| 284 | */
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| 285 | uint32_t uStartX = 0;
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| 286 | while ( uStartX < pThis->cchWidth
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| 287 | && RT_SUCCESS(rc))
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| 288 | {
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| 289 | uint32_t cchWrite = 0;
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| 290 | DBGCSCREENCOLOR enmColorStart = *pColor;
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| 291 | while ( uStartX + cchWrite < pThis->cchWidth
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| 292 | && enmColorStart == *pColor)
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| 293 | {
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| 294 | pColor++;
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| 295 | cchWrite++;
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| 296 | }
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| 297 |
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| 298 | const char *pszEsc = dbgcScreenAsciiColorToEscapeSeq(enmColorStart);
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| 299 | rc = pfnBlit(pszEsc, pvUser);
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| 300 | if (RT_SUCCESS(rc))
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| 301 | {
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| 302 | char chTmp = psz[cchWrite];
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| 303 | psz[cchWrite] = '\0';
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| 304 | rc = pfnBlit(psz, pvUser);
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| 305 | psz[cchWrite] = chTmp;
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| 306 | uStartX += cchWrite;
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| 307 | psz += cchWrite;
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| 308 | }
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| 309 | }
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| 310 | rc = pfnBlit("\n", pvUser);
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| 311 | }
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| 312 |
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| 313 | /* Restore to default values at the end. */
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| 314 | if (RT_SUCCESS(rc))
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| 315 | {
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| 316 | const char *pszEsc = dbgcScreenAsciiColorToEscapeSeq(DBGCSCREENCOLOR_DEFAULT);
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| 317 | rc = pfnBlit(pszEsc, pvUser);
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| 318 | }
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| 319 | }
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| 320 |
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| 321 | return rc;
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| 322 | }
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| 323 |
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| 324 |
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| 325 | /**
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| 326 | * Draws a single character to the screen at the given coordinates.
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| 327 | *
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| 328 | * @returns VBox status code.
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| 329 | * @param hScreen The screen handle.
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| 330 | * @param uX X coordinate.
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| 331 | * @param uY Y coordinate.
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| 332 | * @param ch Character to draw.
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| 333 | * @param enmColor The color to use.
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| 334 | */
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| 335 | DECLHIDDEN(int) dbgcScreenAsciiDrawCharacter(DBGCSCREEN hScreen, uint32_t uX, uint32_t uY, char ch,
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| 336 | DBGCSCREENCOLOR enmColor)
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| 337 | {
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| 338 | PDBGCSCREENINT pThis = hScreen;
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| 339 | AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
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| 340 |
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| 341 | char *psz = dbgcScreenAsciiGetBufferAtPos(pThis, uX, uY);
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| 342 | PDBGCSCREENCOLOR pColor = dbgcScreenAsciiGetColorBufferAtPos(pThis, uX, uY);
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| 343 | AssertPtrReturn(psz, VERR_INVALID_STATE);
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| 344 | AssertPtrReturn(pColor, VERR_INVALID_STATE);
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| 345 | AssertReturn(*psz != '\0', VERR_INVALID_STATE);
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| 346 |
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| 347 | *psz = ch;
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| 348 | *pColor = enmColor;
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| 349 | return VINF_SUCCESS;
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| 350 | }
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| 351 |
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| 352 |
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| 353 | /**
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| 354 | * Draws a vertical line at the given coordinates.
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| 355 | *
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[99739] | 356 | * @returns VBox status code.
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[64554] | 357 | * @param hScreen The screen handle.
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| 358 | * @param uX X position to draw.
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| 359 | * @param uStartY Y position to start drawing.
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| 360 | * @param uEndY Y position to draw to (inclusive).
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| 361 | * @param ch The character to use for drawing.
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| 362 | * @param enmColor The color to use.
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| 363 | */
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| 364 | DECLHIDDEN(int) dbgcScreenAsciiDrawLineVertical(DBGCSCREEN hScreen, uint32_t uX, uint32_t uStartY,
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| 365 | uint32_t uEndY, char ch, DBGCSCREENCOLOR enmColor)
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| 366 | {
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| 367 | PDBGCSCREENINT pThis = hScreen;
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| 368 | AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
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| 369 |
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| 370 | while (uStartY <= uEndY)
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| 371 | {
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| 372 | char *psz = dbgcScreenAsciiGetBufferAtPos(pThis, uX, uStartY);
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| 373 | PDBGCSCREENCOLOR pColor = dbgcScreenAsciiGetColorBufferAtPos(pThis, uX, uStartY);
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| 374 | AssertPtrReturn(psz, VERR_INVALID_STATE);
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| 375 | AssertPtrReturn(pColor, VERR_INVALID_STATE);
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| 376 | *psz = ch;
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| 377 | *pColor = enmColor;
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| 378 | uStartY++;
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| 379 | }
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| 380 |
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| 381 | return VINF_SUCCESS;
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| 382 | }
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| 383 |
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| 384 |
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| 385 | /**
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| 386 | * Draws a horizontal line at the given coordinates.
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| 387 | *
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| 388 | * @returns VBox status code..
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| 389 | * @param hScreen The screen handle.
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| 390 | * @param uStartX X position to start drawing.
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| 391 | * @param uEndX X position to draw the line to (inclusive).
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| 392 | * @param uY Y position.
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| 393 | * @param ch The character to use for drawing.
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| 394 | * @param enmColor The color to use.
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| 395 | */
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| 396 | DECLHIDDEN(int) dbgcScreenAsciiDrawLineHorizontal(DBGCSCREEN hScreen, uint32_t uStartX, uint32_t uEndX,
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| 397 | uint32_t uY, char ch, DBGCSCREENCOLOR enmColor)
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| 398 | {
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| 399 | PDBGCSCREENINT pThis = hScreen;
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| 400 | AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
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| 401 |
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| 402 | char *psz = dbgcScreenAsciiGetBufferAtPos(pThis, uStartX, uY);
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| 403 | PDBGCSCREENCOLOR pColor = dbgcScreenAsciiGetColorBufferAtPos(pThis, uStartX, uY);
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| 404 | AssertPtrReturn(psz, VERR_INVALID_STATE);
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| 405 | AssertPtrReturn(pColor, VERR_INVALID_STATE);
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| 406 |
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| 407 | memset(psz, ch, uEndX - uStartX + 1);
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| 408 | for (unsigned i = 0; i < uEndX - uStartX + 1; i++)
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| 409 | pColor[i] = enmColor;
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| 410 |
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| 411 | return VINF_SUCCESS;
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| 412 | }
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| 413 |
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| 414 |
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| 415 | /**
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| 416 | * Draws a given string to the screen.
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| 417 | *
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| 418 | * @returns VBox status code..
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| 419 | * @param hScreen The screen handle.
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| 420 | * @param uX X position to start drawing.
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| 421 | * @param uY Y position.
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| 422 | * @param pszText The string to draw.
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| 423 | * @param enmColor The color to use.
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| 424 | */
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| 425 | DECLHIDDEN(int) dbgcScreenAsciiDrawString(DBGCSCREEN hScreen, uint32_t uX, uint32_t uY, const char *pszText,
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| 426 | DBGCSCREENCOLOR enmColor)
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| 427 | {
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| 428 | PDBGCSCREENINT pThis = hScreen;
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| 429 | size_t cchText = strlen(pszText);
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| 430 | AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
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| 431 | AssertReturn(uX + cchText <= pThis->cchWidth, VERR_OUT_OF_RANGE);
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| 432 | AssertReturn(uY < pThis->cchHeight, VERR_OUT_OF_RANGE);
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| 433 |
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| 434 | char *psz = dbgcScreenAsciiGetBufferAtPos(pThis, uX, uY);
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| 435 | PDBGCSCREENCOLOR pColor = dbgcScreenAsciiGetColorBufferAtPos(pThis, uX, uY);
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| 436 | AssertPtrReturn(psz, VERR_INVALID_STATE);
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| 437 | AssertPtrReturn(pColor, VERR_INVALID_STATE);
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| 438 |
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| 439 | memcpy(psz, pszText, cchText);
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| 440 |
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| 441 | for (unsigned i = 0; i < cchText; i++)
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| 442 | pColor[i] = enmColor;
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| 443 |
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| 444 | return VINF_SUCCESS;
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| 445 | }
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