?? video.c
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/****************************************************************************** Product: VGA screen output* Last Updated for Version: 4.0.00* Date of the Last Update: Apr 07, 2008** Q u a n t u m L e a P s* ---------------------------* innovating embedded systems** Copyright (C) 2002-2008 Quantum Leaps, LLC. All rights reserved.** This software may be distributed and modified under the terms of the GNU* General Public License version 2 (GPL) as published by the Free Software* Foundation and appearing in the file GPL.TXT included in the packaging of* this file. Please note that GPL Section 2[b] requires that all works based* on this software must also be made publicly available under the terms of* the GPL ("Copyleft").** Alternatively, this software may be distributed and modified under the* terms of Quantum Leaps commercial licenses, which expressly supersede* the GPL and are specifically designed for licensees interested in* retaining the proprietary status of their code.** Contact information:* Quantum Leaps Web site: http://www.quantum-leaps.com* e-mail: info@quantum-leaps.com*****************************************************************************/#include "qp_port.h"#include "video.h"#include <conio.h>#include <dos.h>#define VIDEO_BASE 0xB800#define VIDEO_WIDTH 80#define VIDEO_HEIGHT 25/*..........................................................................*/void Video_clearScreen(uint8_t bgColor) { clrscr(); Video_clearRect(0, 0, VIDEO_WIDTH, VIDEO_HEIGHT, bgColor);}/*..........................................................................*/void Video_clearRect(uint8_t x1, uint8_t y1, uint8_t x2, uint8_t y2, uint8_t bgColor){ uint8_t far *pscrX = (uint8_t far *)MK_FP(VIDEO_BASE, (uint16_t)(((y1 * VIDEO_WIDTH) + x1) * 2)); x2 -= x1; y2 -= y1; for (x1 = 0; x1 < x2; ++x1, pscrX += 2) { /* loop over x */ uint8_t far *pscrXY = pscrX; for (y1 = 0; y1 < y2; ++y1, pscrXY += 2*VIDEO_WIDTH) { pscrXY[0] = 0x20; /* Put space in video RAM */ pscrXY[1] = bgColor; /* Put video attribute in video RAM */ } }}/*..........................................................................*/void Video_printStrAt(uint8_t x, uint8_t y, uint8_t color, char const *str){ /* calculate position on the video RAM (VGA) */ uint8_t far *pscr = (uint8_t far *)MK_FP(VIDEO_BASE, (uint16_t)(((y * VIDEO_WIDTH) + x) * 2)); while (*str != (uint8_t)0) { pscr[0] = *str++; /* Put character in video RAM */ pscr[1] &= ~0x0F; /* clear the foreground color */ pscr[1] |= color; /* Put video attribute in video RAM */ pscr += 2; }}/*..........................................................................*/void Video_printNumAt(uint8_t x, uint8_t y, uint8_t color, uint32_t num) { uint8_t far *pscr = (uint8_t far *)MK_FP(VIDEO_BASE, (uint16_t)(((y * VIDEO_WIDTH) + x) * 2)); pscr[3*2] = (char)('0' + (num % 10)); pscr[3*2 + 1] |= color; num /= 10; pscr[2*2] = (char)('0' + (num % 10)); pscr[2*2 + 1] |= color; num /= 10; if (num == 0) { if (pscr[2*2] == '0') { pscr[2*2] = 0x20; } } else { pscr[1*2] = (char)('0' + (num % 10)); pscr[1*2 + 1] |= color; num /= 10; if (num == 0) { if (pscr[1*2] == '0') { pscr[1*2] = 0x20; } } else { pscr[0] = (char)('0' + num % 10); pscr[0 + 1] |= color; if (pscr[0] == '0') { pscr[0] = 0x20; } } }}/*..........................................................................*/void Video_drawBitmapAt(uint8_t x, uint8_t y, uint8_t const *bitmap, uint8_t width, uint8_t height){ uint8_t far *pscrX = (uint8_t far *)MK_FP(VIDEO_BASE, (uint16_t)(((y * VIDEO_WIDTH) + x) << 1)); uint8_t ix, iy; uint8_t w = width; uint8_t h = height; /* perform the clipping */ if (x > VIDEO_WIDTH) { x = VIDEO_WIDTH; } if (y > VIDEO_HEIGHT) { y = VIDEO_HEIGHT; } if (w > VIDEO_WIDTH - x) { w = VIDEO_WIDTH - x; } if (h > VIDEO_HEIGHT - y) { h = VIDEO_HEIGHT - y; } for (ix = 0; ix < w; ++ix, pscrX += 2) { /* loop over x */ uint8_t far *pscrXY = pscrX; for (iy = 0; iy < h; ++iy, pscrXY += 2*VIDEO_WIDTH) { static uint8_t const pixel[2] = { 0x20, 0xDB }; uint8_t byte = bitmap[ix + (iy >> 3)*width]; *pscrXY = pixel[(byte >> (iy & 0x7)) & 1]; } }}/*..........................................................................*/void Video_drawStringAt(uint8_t x, uint8_t y, char const *str) { static uint8_t const font5x7[95][5] = { { 0x00, 0x00, 0x00, 0x00, 0x00 }, /* ' ' */ { 0x00, 0x00, 0x4F, 0x00, 0x00 }, /* ! */ { 0x00, 0x07, 0x00, 0x07, 0x00 }, /* " */ { 0x14, 0x7F, 0x14, 0x7F, 0x14 }, /* # */ { 0x24, 0x2A, 0x7F, 0x2A, 0x12 }, /* $ */ { 0x23, 0x13, 0x08, 0x64, 0x62 }, /* % */ { 0x36, 0x49, 0x55, 0x22, 0x50 }, /* & */ { 0x00, 0x05, 0x03, 0x00, 0x00 }, /* ' */ { 0x00, 0x1C, 0x22, 0x41, 0x00 }, /* ( */ { 0x00, 0x41, 0x22, 0x1C, 0x00 }, /* ) */ { 0x14, 0x08, 0x3E, 0x08, 0x14 }, /* * */ { 0x08, 0x08, 0x3E, 0x08, 0x08 }, /* + */ { 0x00, 0x50, 0x30, 0x00, 0x00 }, /* , */ { 0x08, 0x08, 0x08, 0x08, 0x08 }, /* - */ { 0x00, 0x60, 0x60, 0x00, 0x00 }, /* . */ { 0x20, 0x10, 0x08, 0x04, 0x02 }, /* / */ { 0x3E, 0x51, 0x49, 0x45, 0x3E }, /* 0 */ { 0x00, 0x42, 0x7F, 0x40, 0x00 }, /* 1 */ { 0x42, 0x61, 0x51, 0x49, 0x46 }, /* 2 */ { 0x21, 0x41, 0x45, 0x4B, 0x31 }, /* 3 */ { 0x18, 0x14, 0x12, 0x7F, 0x10 }, /* 4 */ { 0x27, 0x45, 0x45, 0x45, 0x39 }, /* 5 */ { 0x3C, 0x4A, 0x49, 0x49, 0x30 }, /* 6 */ { 0x01, 0x71, 0x09, 0x05, 0x03 }, /* 7 */ { 0x36, 0x49, 0x49, 0x49, 0x36 }, /* 8 */ { 0x06, 0x49, 0x49, 0x29, 0x1E }, /* 9 */ { 0x00, 0x36, 0x36, 0x00, 0x00 }, /* : */ { 0x00, 0x56, 0x36, 0x00, 0x00 }, /* ; */ { 0x08, 0x14, 0x22, 0x41, 0x00 }, /* < */ { 0x14, 0x14, 0x14, 0x14, 0x14 }, /* = */ { 0x00, 0x41, 0x22, 0x14, 0x08 }, /* > */ { 0x02, 0x01, 0x51, 0x09, 0x06 }, /* ? */ { 0x32, 0x49, 0x79, 0x41, 0x3E }, /* @ */ { 0x7E, 0x11, 0x11, 0x11, 0x7E }, /* A */ { 0x7F, 0x49, 0x49, 0x49, 0x36 }, /* B */ { 0x3E, 0x41, 0x41, 0x41, 0x22 }, /* C */ { 0x7F, 0x41, 0x41, 0x22, 0x1C }, /* D */ { 0x7F, 0x49, 0x49, 0x49, 0x41 }, /* E */ { 0x7F, 0x09, 0x09, 0x09, 0x01 }, /* F */ { 0x3E, 0x41, 0x49, 0x49, 0x7A }, /* G */ { 0x7F, 0x08, 0x08, 0x08, 0x7F }, /* H */ { 0x00, 0x41, 0x7F, 0x41, 0x00 }, /* I */ { 0x20, 0x40, 0x41, 0x3F, 0x01 }, /* J */ { 0x7F, 0x08, 0x14, 0x22, 0x41 }, /* K */ { 0x7F, 0x40, 0x40, 0x40, 0x40 }, /* L */ { 0x7F, 0x02, 0x0C, 0x02, 0x7F }, /* M */ { 0x7F, 0x04, 0x08, 0x10, 0x7F }, /* N */ { 0x3E, 0x41, 0x41, 0x41, 0x3E }, /* O */ { 0x7F, 0x09, 0x09, 0x09, 0x06 }, /* P */ { 0x3E, 0x41, 0x51, 0x21, 0x5E }, /* Q */ { 0x7F, 0x09, 0x19, 0x29, 0x46 }, /* R */ { 0x46, 0x49, 0x49, 0x49, 0x31 }, /* S */ { 0x01, 0x01, 0x7F, 0x01, 0x01 }, /* T */ { 0x3F, 0x40, 0x40, 0x40, 0x3F }, /* U */ { 0x1F, 0x20, 0x40, 0x20, 0x1F }, /* V */ { 0x3F, 0x40, 0x38, 0x40, 0x3F }, /* W */ { 0x63, 0x14, 0x08, 0x14, 0x63 }, /* X */ { 0x07, 0x08, 0x70, 0x08, 0x07 }, /* Y */ { 0x61, 0x51, 0x49, 0x45, 0x43 }, /* Z */ { 0x00, 0x7F, 0x41, 0x41, 0x00 }, /* [ */ { 0x02, 0x04, 0x08, 0x10, 0x20 }, /* \ */ { 0x00, 0x41, 0x41, 0x7F, 0x00 }, /* ] */ { 0x04, 0x02, 0x01, 0x02, 0x04 }, /* ^ */ { 0x40, 0x40, 0x40, 0x40, 0x40 }, /* _ */ { 0x00, 0x01, 0x02, 0x04, 0x00 }, /* ` */ { 0x20, 0x54, 0x54, 0x54, 0x78 }, /* a */ { 0x7F, 0x48, 0x44, 0x44, 0x38 }, /* b */ { 0x38, 0x44, 0x44, 0x44, 0x20 }, /* c */ { 0x38, 0x44, 0x44, 0x48, 0x7F }, /* d */ { 0x38, 0x54, 0x54, 0x54, 0x18 }, /* e */ { 0x08, 0x7E, 0x09, 0x01, 0x02 }, /* f */ { 0x0C, 0x52, 0x52, 0x52, 0x3E }, /* g */ { 0x7F, 0x08, 0x04, 0x04, 0x78 }, /* h */ { 0x00, 0x44, 0x7D, 0x40, 0x00 }, /* i */ { 0x20, 0x40, 0x44, 0x3D, 0x00 }, /* j */ { 0x7F, 0x10, 0x28, 0x44, 0x00 }, /* k */ { 0x00, 0x41, 0x7F, 0x40, 0x00 }, /* l */ { 0x7C, 0x04, 0x18, 0x04, 0x78 }, /* m */ { 0x7C, 0x08, 0x04, 0x04, 0x78 }, /* n */ { 0x38, 0x44, 0x44, 0x44, 0x38 }, /* o */ { 0x7C, 0x14, 0x14, 0x14, 0x08 }, /* p */ { 0x08, 0x14, 0x14, 0x18, 0x7C }, /* q */ { 0x7C, 0x08, 0x04, 0x04, 0x08 }, /* r */ { 0x48, 0x54, 0x54, 0x54, 0x20 }, /* s */ { 0x04, 0x3F, 0x44, 0x40, 0x20 }, /* t */ { 0x3C, 0x40, 0x40, 0x20, 0x7C }, /* u */ { 0x1C, 0x20, 0x40, 0x20, 0x1C }, /* v */ { 0x3C, 0x40, 0x30, 0x40, 0x3C }, /* w */ { 0x44, 0x28, 0x10, 0x28, 0x44 }, /* x */ { 0x0C, 0x50, 0x50, 0x50, 0x3C }, /* y */ { 0x44, 0x64, 0x54, 0x4C, 0x44 }, /* z */ { 0x00, 0x08, 0x36, 0x41, 0x00 }, /* { */ { 0x00, 0x00, 0x7F, 0x00, 0x00 }, /* | */ { 0x00, 0x41, 0x36, 0x08, 0x00 }, /* } */ { 0x02, 0x01, 0x02, 0x04, 0x02 }, /* ~ */ }; while (*str != '\0') { Video_drawBitmapAt(x, y, font5x7[*str - ' '], 5, 8); ++str; x += 6; }} ?? 快捷鍵說明
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