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/*
* Copyright (c) 2008, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <boot/boot.h>
#include <boot/font5x12.h>
static unsigned short BGCOLOR = 0x001F;
static unsigned short FGCOLOR = 0xFFFF;
static void drawglyph(unsigned short *pixels, unsigned short paint,
unsigned stride, unsigned *glyph)
{
unsigned x, y, data;
stride -= 5;
data = glyph[0];
for(y = 0; y < 6; y++) {
for(x = 0; x < 5; x++) {
if(data & 1) *pixels = paint;
data >>= 1;
pixels++;
}
pixels += stride;
}
data = glyph[1];
for(y = 0; y < 6; y++) {
for(x = 0; x < 5; x++) {
if(data & 1) *pixels = paint;
data >>= 1;
pixels++;
}
pixels += stride;
}
}
#if 0
static void drawtext(unsigned x, unsigned y, unsigned paint, const char *text)
{
unsigned short *pixels = mddi_framebuffer();
unsigned stride = fb_width;
char c;
while((c = *text++)) {
if((c < ' ') || (c > 127)) continue;
c = (c - 32) * 2;
drawglyph(pixels + y*stride + x, paint, stride, font5x12 + c);
x += 6;
}
}
#endif
static int cx, cy, cmaxx, cmaxy;
void console_clear(void)
{
unsigned short *dst = mddi_framebuffer();
unsigned count = fb_width * fb_height;
cx = 0;
cy = 0;
while(count--) *dst++ = BGCOLOR;
}
static void scroll_up(void)
{
unsigned short *dst = mddi_framebuffer();
unsigned short *src = dst + (fb_width * 12);
unsigned count = fb_height * (fb_width - 12);
while(count--) {
*dst++ = *src++;
}
count = fb_width * 12;
while(count--) {
*dst++ = BGCOLOR;
}
}
void console_putc(unsigned c)
{
unsigned short *pixels;
if(c > 127) return;
if(c < 32) {
if(c == '\n') goto newline;
return;
}
pixels = mddi_framebuffer();
drawglyph(pixels + cy * 12 * fb_width + cx * 6, FGCOLOR,
fb_width, font5x12 + (c - 32) * 2);
cx++;
if(cx < cmaxx) return;
newline:
cy++;
cx = 0;
if(cy >= cmaxy) {
cy = cmaxy - 1;
scroll_up();
}
}
void console_flush(void)
{
mddi_start_update();
while(!mddi_update_done()) ;
}
void console_set_colors(unsigned bg, unsigned fg)
{
BGCOLOR = bg;
FGCOLOR = fg;
}
void console_init(void)
{
mddi_init();
cmaxx = fb_width / 6;
cmaxy = (fb_height-1) / 12;
cx = 0;
cy = 0;
console_clear();
console_flush();
}
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