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836 palkovsky 1
/*
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 * Copyright (C) 2006 Ondrej Palkovsky
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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837 palkovsky 29
#include <genarch/fb/font-8x16.h>
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#include <genarch/fb/fb.h>
836 palkovsky 31
#include <console/chardev.h>
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#include <console/console.h>
839 palkovsky 33
#include <panic.h>
836 palkovsky 34
 
862 palkovsky 35
#include "helenos.xbm"
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836 palkovsky 37
SPINLOCK_INITIALIZE(fb_lock);
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838 palkovsky 39
static __u8 *fbaddress=NULL;
836 palkovsky 40
static int xres,yres;
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static int position=0;
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static int columns=0;
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static int rows=0;
838 palkovsky 44
static int pixelbytes=0;
836 palkovsky 45
 
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#define COL_WIDTH   8
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#define ROW_HEIGHT  (FONT_SCANLINES)
838 palkovsky 48
#define ROW_PIX     (xres*ROW_HEIGHT*pixelbytes)
836 palkovsky 49
 
50
#define BGCOLOR   0x000080
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#define FGCOLOR   0xffff00
862 palkovsky 52
#define LOGOCOLOR 0x2020b0
836 palkovsky 53
 
838 palkovsky 54
#define RED(x,bits)    ((x >> (16+8-bits)) & ((1<<bits)-1))
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#define GREEN(x,bits)  ((x >> (8+8-bits)) & ((1<<bits)-1))
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#define BLUE(x,bits)   ((x >> (8-bits)) & ((1<<bits)-1))
836 palkovsky 57
 
838 palkovsky 58
#define POINTPOS(x,y)   ((y*xres+x)*pixelbytes)
836 palkovsky 59
 
838 palkovsky 60
/***************************************************************/
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/* Pixel specific fuctions */
62
 
839 palkovsky 63
static void (*putpixel)(int x,int y,int color);
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static int (*getpixel)(int x,int y);
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66
/** Put pixel - 24-bit depth, 1 free byte */
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static void putpixel_4byte(int x,int y,int color)
836 palkovsky 68
{
838 palkovsky 69
    int startbyte = POINTPOS(x,y);
70
 
839 palkovsky 71
    *((__u32 *)(fbaddress+startbyte)) = color;
836 palkovsky 72
}
73
 
838 palkovsky 74
/** Return pixel color */
839 palkovsky 75
static int getpixel_4byte(int x,int y)
838 palkovsky 76
{
77
    int startbyte = POINTPOS(x,y);
839 palkovsky 78
 
79
    return *((__u32 *)(fbaddress+startbyte)) & 0xffffff;
80
}
81
 
82
/** Draw pixel of given color on screen - 24-bit depth */
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static void putpixel_3byte(int x,int y,int color)
84
{
85
    int startbyte = POINTPOS(x,y);
86
 
87
    fbaddress[startbyte] = RED(color,8);
88
    fbaddress[startbyte+1] = GREEN(color,8);
89
    fbaddress[startbyte+2] = BLUE(color,8);
90
}
91
 
92
static int getpixel_3byte(int x,int y)
93
{
94
    int startbyte = POINTPOS(x,y);
838 palkovsky 95
    int result;
96
 
839 palkovsky 97
    result = fbaddress[startbyte] << 16 \
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        | fbaddress[startbyte+1] << 8 \
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        | fbaddress[startbyte+2];
838 palkovsky 100
    return result;
101
}
102
 
839 palkovsky 103
/** Put pixel - 16-bit depth (5:6:6) */
104
static void putpixel_2byte(int x,int y,int color)
105
{
106
    int startbyte = POINTPOS(x,y);
107
    int compcolor;
108
 
109
    /* 5-bit, 5-bits, 5-bits */
110
    compcolor = RED(color,5) << 11 \
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        | GREEN(color,6) << 5 \
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        | BLUE(color,5);
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    *((__u16 *)(fbaddress+startbyte)) = compcolor;
114
}
115
 
116
static int getpixel_2byte(int x,int y)
117
{
118
    int startbyte = POINTPOS(x,y);
119
    int color;
120
    int red,green,blue;
121
 
122
    color = *((__u16 *)(fbaddress+startbyte));
123
    red = (color >> 11) & 0x1f;
124
    green = (color >> 5) & 0x3f;
125
    blue = color & 0x1f;
126
    return (red << (16+3)) | (green << (8+2)) | (blue << 3);
127
}
128
 
886 jermar 129
/** Put pixel - 8-bit depth (3:2:3) */
839 palkovsky 130
static void putpixel_1byte(int x,int y,int color)
131
{
132
    int compcolor;
133
 
886 jermar 134
    /* 3-bit, 2-bits, 3-bits */
839 palkovsky 135
    compcolor = RED(color,3) << 5 \
886 jermar 136
        | GREEN(color,2) << 3 \
137
        | BLUE(color,3);
839 palkovsky 138
    fbaddress[POINTPOS(x,y)] = compcolor;
139
}
140
 
141
 
142
static int getpixel_1byte(int x,int y)
143
{
144
    int color;
145
    int red,green,blue;
146
 
147
    color = fbaddress[POINTPOS(x,y)];
148
    red = (color >> 5) & 0x7;
891 palkovsky 149
    green = (color >> 3) & 0x3;
150
    blue = color & 0x7;
151
    return (red << (16+5)) | (green << (8+6)) | blue << 5;
839 palkovsky 152
}
153
 
838 palkovsky 154
static void clear_line(int y);
155
/** Scroll screen one row up */
156
static void scroll_screen(void)
157
{
158
    int i;
159
 
160
    for (i=0;i < (xres*yres*pixelbytes)-ROW_PIX; i++)
161
        fbaddress[i] = fbaddress[i+ROW_PIX];
162
 
163
    /* Clear last row */
164
    for (i=0; i < ROW_HEIGHT;i++)
165
        clear_line((rows-1)*ROW_HEIGHT+i);
166
 
167
}
168
 
169
 
170
/***************************************************************/
171
/* Screen specific function */
172
 
836 palkovsky 173
/** Fill line with color BGCOLOR */
174
static void clear_line(int y)
175
{
176
    int x;
177
    for (x=0; x<xres;x++)
839 palkovsky 178
        (*putpixel)(x,y,BGCOLOR);
836 palkovsky 179
}
180
 
181
/** Fill screen with background color */
182
static void clear_screen(void)
183
{
184
    int y;
185
 
186
    for (y=0; y<yres;y++)
187
        clear_line(y);
188
}
189
 
190
static void invert_pixel(int x, int y)
191
{
839 palkovsky 192
    (*putpixel)(x,y, ~(*getpixel)(x,y));
836 palkovsky 193
}
194
 
195
 
196
/** Draw one line of glyph at a given position */
197
static void draw_glyph_line(int glline, int x, int y)
198
{
199
    int i;
200
 
201
    for (i=0; i < 8; i++)
202
        if (glline & (1 << (7-i))) {
839 palkovsky 203
            (*putpixel)(x+i,y,FGCOLOR);
836 palkovsky 204
        } else
839 palkovsky 205
            (*putpixel)(x+i,y,BGCOLOR);
836 palkovsky 206
}
207
 
838 palkovsky 208
/***************************************************************/
209
/* Character-console functions */
210
 
836 palkovsky 211
/** Draw character at given position */
838 palkovsky 212
static void draw_glyph(__u8 glyph, int col, int row)
836 palkovsky 213
{
214
    int y;
215
 
216
    for (y=0; y < FONT_SCANLINES; y++)
217
        draw_glyph_line(fb_font[glyph*FONT_SCANLINES+y],
218
                col*COL_WIDTH, row*ROW_HEIGHT+y);
219
}
220
 
221
/** Invert character at given position */
222
static void invert_char(int col, int row)
223
{
224
    int x,y;
225
 
226
    for (x=0; x < COL_WIDTH; x++)
227
        for (y=0; y < FONT_SCANLINES; y++)
228
            invert_pixel(col*COL_WIDTH+x,row*ROW_HEIGHT+y);
229
}
230
 
231
/** Draw character at default position */
232
static void draw_char(char chr)
233
{
234
    draw_glyph(chr, position % columns, position/columns);
235
}
236
 
862 palkovsky 237
static void draw_logo(int startx, int starty)
238
{
239
    int x,y;
240
    int byte;
241
    int rowbytes;
242
 
243
    rowbytes = (helenos_width-1)/8 + 1;
244
 
245
    for (y=0;y < helenos_height;y++)
246
        for (x=0;x < helenos_width; x++ ) {
247
            byte = helenos_bits[rowbytes*y + x/8];
248
            byte >>= x % 8;
249
            if (byte & 1)
250
                (*putpixel)(startx+x,starty+y,LOGOCOLOR);
251
        }
252
}
253
 
838 palkovsky 254
/***************************************************************/
255
/* Stdout specific functions */
256
 
836 palkovsky 257
static void invert_cursor(void)
258
{
259
    invert_char(position % columns, position/columns);
260
}
261
 
262
/** Print character to screen
263
 *
264
 *  Emulate basic terminal commands
265
 */
266
static void fb_putchar(chardev_t *dev, char ch)
267
{
268
    spinlock_lock(&fb->lock);
269
 
270
    if (ch == '\n') {
271
        invert_cursor();
272
        position += columns;
273
        position -= position % columns;
274
    } else if (ch == '\r') {
275
        invert_cursor();
276
        position -= position % columns;
277
    } else if (ch == '\b') {
278
        invert_cursor();
279
        if (position % columns)
280
            position--;
838 palkovsky 281
    } else if (ch == '\t') {
282
        invert_cursor();
283
        do {
284
            draw_char(' ');
285
            position++;
286
        } while (position % 8);
836 palkovsky 287
    } else {
288
        draw_char(ch);
289
        position++;
290
    }
291
    if (position >= columns*rows) {
292
        position -= columns;
293
        scroll_screen();
294
    }
295
    invert_cursor();
296
    spinlock_unlock(&fb->lock);
297
}
298
 
299
static chardev_t framebuffer;
300
static chardev_operations_t fb_ops = {
301
    .write = fb_putchar,
302
};
303
 
304
 
305
/** Initialize framebuffer as a chardev output device
306
 *
307
 * @param addr Address of framebuffer
308
 * @param x X resolution
309
 * @param y Y resolution
838 palkovsky 310
 * @param bytes Bytes per pixel (2,3,4)
836 palkovsky 311
 */
838 palkovsky 312
void fb_init(__address addr, int x, int y, int bytes)
836 palkovsky 313
{
314
    fbaddress = (unsigned char *)addr;
839 palkovsky 315
 
316
    switch (bytes) {
317
    case 1:
318
        putpixel = putpixel_1byte;
319
        getpixel = getpixel_1byte;
320
        break;
321
    case 2:
322
        putpixel = putpixel_2byte;
323
        getpixel = getpixel_2byte;
324
        break;
325
    case 3:
326
        putpixel = putpixel_3byte;
327
        getpixel = getpixel_3byte;
328
        break;
329
    case 4:
330
        putpixel = putpixel_4byte;
331
        getpixel = getpixel_4byte;
332
        break;
333
    default:
334
        panic("Unsupported color depth");
335
    }
836 palkovsky 336
 
337
    xres = x;
338
    yres = y;
838 palkovsky 339
    pixelbytes = bytes;
836 palkovsky 340
 
341
    rows = y/ROW_HEIGHT;
342
    columns = x/COL_WIDTH;
343
 
344
    clear_screen();
862 palkovsky 345
    draw_logo(xres-helenos_width, 0);
836 palkovsky 346
    invert_cursor();
347
 
348
    chardev_initialize("fb", &framebuffer, &fb_ops);
349
    stdout = &framebuffer;
350
}
351