85 lines
No EOL
2.4 KiB
C
Executable file
85 lines
No EOL
2.4 KiB
C
Executable file
#include "rt.h"
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#include <font.h>
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#include <stdint.h>
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#include <mm/memop.h>
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static rt_context _curctx;
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void _rt_drawchar(unsigned char c, int x, int y, int fgcolor, int bgcolor)
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{
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int cx,cy;
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int mask[8]={128, 64, 32, 16, 8, 4, 2, 1};
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unsigned char *glyph=VGA8+(int)c*16;
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uint32_t *buf = _curctx.framebuffer;
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for(cy=0;cy<16;cy++){
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for(cx=0;cx<8;cx++){
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buf[((y + cy) * _curctx.framebuffer_width) + (x + cx)] = glyph[cy]&mask[cx]?fgcolor:bgcolor;
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}
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}
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}
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void _rt_draw_fillchar(int x, int y, int bgcolor, int fgcolor) {
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int cx,cy;
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uint32_t *buf = _curctx.framebuffer;
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for(cy=0;cy<16;cy++){
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for(cx=0;cx<8;cx++){
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buf[((y + cy) * _curctx.framebuffer_width) + (x + cx)] = cy > 12 ? fgcolor : bgcolor;
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}
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}
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}
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int _rt_strlen(char *str) {
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int i = 0;
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while (str[i] != '\0') i++;
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return i;
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}
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void rt_init(rt_context ctx) {
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// Copy the structure
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char *src = (char*)&ctx;
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char *dst = (char*)&_curctx;
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for (unsigned long i = 0; i < sizeof(rt_context); i++) {
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dst[i] = src[i];
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}
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// Fill fields
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_curctx.term_width = _curctx.framebuffer_width / 8;
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_curctx.term_height = _curctx.framebuffer_height / 16;
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}
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void rt_print(char *str) {
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_rt_draw_fillchar(_curctx.x * 8, _curctx.y * 16, 0x0, 0x0);
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for (int i = 0; i < _rt_strlen(str); i++) {
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if (str[i] == '\n' && _curctx.use_crlf_ending)
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if (_curctx.y * 16 >= (int)_curctx.framebuffer_height) {
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_curctx.y = 0;
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memset(
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_curctx.framebuffer, _curctx.bg_color,
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_curctx.framebuffer_width * _curctx.framebuffer_height * sizeof(uint32_t));
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} else {
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_curctx.y++;
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}
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else if (str[i] == '\n')
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{
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if (_curctx.y * 16 >= (int)_curctx.framebuffer_height) {
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_curctx.y = 0;
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memset(
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_curctx.framebuffer, _curctx.bg_color,
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_curctx.framebuffer_width * _curctx.framebuffer_height * sizeof(uint32_t));
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} else {
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_curctx.y++;
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}
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_curctx.x = 0;
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}
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else if (str[i] == '\r')
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_curctx.x = 0;
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else {
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_rt_drawchar(str[i], _curctx.x * 8, _curctx.y * 16, 0xFFFFFF, 0x0);
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_curctx.x++;
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}
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}
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_rt_draw_fillchar(_curctx.x * 8, _curctx.y * 16, 0x0, 0xFFFFFF);
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} |