summaryrefslogtreecommitdiffstats
path: root/firmware/drivers/lcd-1bit-vert.c
blob: 548dd969947b1375cc77175a097c3c90f223d327 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id$
 *
 * Copyright (C) 2002 by Alan Korr
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 ****************************************************************************/

#include "config.h"

#include "lcd.h"
#include "kernel.h"
#include "thread.h"
#include <string.h>
#include <stdlib.h>
#include "file.h"
#include "debug.h"
#include "system.h"
#include "font.h"
#include "rbunicode.h"
#include "bidi.h"
#include "scroll_engine.h"

#ifndef LCDFN /* Not compiling for remote - define macros for main LCD. */
#define LCDFN(fn) lcd_ ## fn
#define FBFN(fn)  fb_ ## fn
#define FBSIZE FRAMEBUFFER_SIZE
#define LCDM(ma) LCD_ ## ma
#define LCDNAME "lcd_"
#define LCDFB(x,y) FBADDR(x, y)
#define MAIN_LCD
#endif

#ifdef MAIN_LCD
#define THIS_STRIDE STRIDE_MAIN
#else
#define THIS_STRIDE STRIDE_REMOTE
#endif

#define CURRENT_VP LCDFN(current_viewport)
/*** globals ***/
static FBFN(data) LCDFN(static_framebuffer)[LCDM(FBHEIGHT)][LCDM(FBWIDTH)] IRAM_LCDFRAMEBUFFER;

static void *LCDFN(frameaddress_default)(int x, int y);

/* shouldn't be changed unless you want system-wide framebuffer changes! */
struct frame_buffer_t LCDFN(framebuffer_default) =
{
    .FBFN(ptr)      = &LCDFN(static_framebuffer)[0][0],
    .get_address_fn = &LCDFN(frameaddress_default),
    .stride         = THIS_STRIDE(LCDM(WIDTH), LCDM(HEIGHT)),
    .elems          = (LCDM(FBWIDTH)*LCDM(FBHEIGHT)),
};

static struct viewport default_vp =
{
    .x        = 0,
    .y        = 0,
    .width    = LCDM(WIDTH),
    .height   = LCDM(HEIGHT),
    .flags    = 0,
    .font     = FONT_SYSFIXED,
    .drawmode = DRMODE_SOLID,
    .buffer   = NULL,
};

struct viewport* CURRENT_VP;

static void *LCDFN(frameaddress_default)(int x, int y)
{
    /* the default expects a buffer the same size as the screen */
    struct frame_buffer_t *fb = CURRENT_VP->buffer;
#if defined(MAIN_LCD) && LCD_STRIDEFORMAT == VERTICAL_STRIDE
    size_t element = (x * LCDM(NATIVE_STRIDE)(fb->stride)) + y;
#else
    size_t element = (y * LCDM(NATIVE_STRIDE)(fb->stride)) + x;
#endif

    return fb->FBFN(ptr) + element;/*(element % fb->elems);*/
}

#include "lcd-bitmap-common.c"

/* LCD init */
void LCDFN(init)(void)
{

    /* Initialize the viewport */
    LCDFN(set_viewport)(NULL);
    LCDFN(clear_display)();
    LCDFN(init_device)();
#ifdef MAIN_LCD
    scroll_init();
#endif

}

/*** low-level drawing functions ***/

static void setpixel(int x, int y)
{
    *LCDFB(x,y>>3) |= BIT_N(y & 7);
}

static void clearpixel(int x, int y)
{
    *LCDFB(x,y>>3) &= ~BIT_N(y & 7);
}

static void flippixel(int x, int y)
{
    *LCDFB(x,y>>3) ^= BIT_N(y & 7);
}

static void nopixel(int x, int y)
{
    (void)x;
    (void)y;
}

LCDFN(pixelfunc_type)* const LCDFN(pixelfuncs)[8] = {
    flippixel, nopixel, setpixel, setpixel,
    nopixel, clearpixel, nopixel, clearpixel
};

static void ICODE_ATTR flipblock(FBFN(data) *address, unsigned mask,
                                 unsigned bits)
{
    *address ^= bits & mask;
}

static void ICODE_ATTR bgblock(FBFN(data) *address, unsigned mask,
                               unsigned bits)
{
    *address &= bits | ~mask;
}

static void ICODE_ATTR fgblock(FBFN(data) *address, unsigned mask,
                               unsigned bits)
{
    *address |= bits & mask;
}

static void ICODE_ATTR solidblock(FBFN(data) *address, unsigned mask,
                                  unsigned bits)
{
    unsigned data = *(char*)address;

    bits    ^= data;
    *address = data ^ (bits & mask);
}

static void ICODE_ATTR flipinvblock(FBFN(data) *address, unsigned mask,
                                    unsigned bits)
{
    *address ^= ~bits & mask;
}

static void ICODE_ATTR bginvblock(FBFN(data) *address, unsigned mask,
                                  unsigned bits)
{
    *address &= ~(bits & mask);
}

static void ICODE_ATTR fginvblock(FBFN(data) *address, unsigned mask,
                                  unsigned bits)
{
    *address |= ~bits & mask;
}

static void ICODE_ATTR solidinvblock(FBFN(data) *address, unsigned mask,
                                     unsigned bits)
{
    unsigned data = *(char *)address;

    bits     = ~bits ^ data;
    *address = data ^ (bits & mask);
}

LCDFN(blockfunc_type)* const LCDFN(blockfuncs)[8] = {
    flipblock, bgblock, fgblock, solidblock,
    flipinvblock, bginvblock, fginvblock, solidinvblock
};

/*** drawing functions ***/

/* Clear the whole display */
void LCDFN(clear_display)(void)
{
    unsigned bits = (CURRENT_VP->drawmode & DRMODE_INVERSEVID) ? 0xFFu : 0;

    memset(LCDFB(0, 0), bits, FBSIZE);
    LCDFN(scroll_info).lines = 0;
}

/* Clear the current viewport */
void LCDFN(clear_viewport)(void)
{
    int oldmode;

    if (CURRENT_VP == &default_vp &&
              default_vp.buffer == &LCDFN(framebuffer_default))
    {
        LCDFN(clear_display)();
    }
    else
    {
        oldmode = CURRENT_VP->drawmode;

        /* Invert the INVERSEVID bit and set basic mode to SOLID */
        CURRENT_VP->drawmode = (~CURRENT_VP->drawmode & DRMODE_INVERSEVID) |
                               DRMODE_SOLID;

        LCDFN(fillrect)(0, 0, CURRENT_VP->width, CURRENT_VP->height);

        CURRENT_VP->drawmode = oldmode;

        LCDFN(scroll_stop_viewport)(CURRENT_VP);
    }

    CURRENT_VP->flags &= ~(VP_FLAG_VP_SET_CLEAN);
}

/* Draw a horizontal line (optimised) */
void LCDFN(hline)(int x1, int x2, int y)
{
    struct viewport *vp = CURRENT_VP;
    int width;
    unsigned char *dst, *dst_end;
    unsigned mask;
    LCDFN(blockfunc_type) *bfunc;

    if (!LCDFN(clip_viewport_hline)(&x1, &x2, &y))
        return;

    width = x2 - x1 + 1;

    bfunc = LCDFN(blockfuncs)[vp->drawmode];
    dst   = LCDFB(x1,y>>3);
    mask  = BIT_N(y & 7);

    dst_end = dst + width;
    do
        bfunc(dst++, mask, 0xFFu);
    while (dst < dst_end);
}

/* Draw a vertical line (optimised) */
void LCDFN(vline)(int x, int y1, int y2)
{
    struct viewport *vp = CURRENT_VP;
    int ny;
    FBFN(data) *dst;
    int stride_dst;
    unsigned mask, mask_bottom;
    LCDFN(blockfunc_type) *bfunc;

    if (!LCDFN(clip_viewport_vline)(&x, &y1, &y2))
        return;

    bfunc = LCDFN(blockfuncs)[vp->drawmode];
    dst   = LCDFB(x,y1>>3);
    ny    = y2 - (y1 & ~7);
    mask  = 0xFFu << (y1 & 7);
    mask_bottom = 0xFFu >> (~ny & 7);
    stride_dst = vp->buffer->stride;

    for (; ny >= 8; ny -= 8)
    {
        bfunc(dst, mask, 0xFFu);
        dst += stride_dst;
        mask = 0xFFu;
    }
    mask &= mask_bottom;
    bfunc(dst, mask, 0xFFu);
}

/* Fill a rectangular area */
void LCDFN(fillrect)(int x, int y, int width, int height)
{
    struct viewport *vp = CURRENT_VP;
    int ny;
    FBFN(data) *dst, *dst_end;
    int stride_dst;
    unsigned mask, mask_bottom;
    unsigned bits = 0;
    LCDFN(blockfunc_type) *bfunc;
    bool fillopt = false;

    if (!LCDFN(clip_viewport_rect)(&x, &y, &width, &height, NULL, NULL))
        return;

    if (vp->drawmode & DRMODE_INVERSEVID)
    {
        if (vp->drawmode & DRMODE_BG)
        {
            fillopt = true;
        }
    }
    else
    {
        if (vp->drawmode & DRMODE_FG)
        {
            fillopt = true;
            bits = 0xFFu;
        }
    }
    bfunc = LCDFN(blockfuncs)[vp->drawmode];
    dst   = LCDFB(x,y>>3);
    ny    = height - 1 + (y & 7);
    mask  = 0xFFu << (y & 7);
    mask_bottom = 0xFFu >> (~ny & 7);
    stride_dst = vp->buffer->stride;

    for (; ny >= 8; ny -= 8)
    {
        if (fillopt && (mask == 0xFFu))
            memset(dst, bits, width);
        else
        {
            FBFN(data) *dst_row = dst;

            dst_end = dst_row + width;
            do
                bfunc(dst_row++, mask, 0xFFu);
            while (dst_row < dst_end);
        }

        dst += stride_dst;
        mask = 0xFFu;
    }
    mask &= mask_bottom;

    if (fillopt && (mask == 0xFFu))
        memset(dst, bits, width);
    else
    {
        dst_end = dst + width;
        do
            bfunc(dst++, mask, 0xFFu);
        while (dst < dst_end);
    }
}

/* About Rockbox' internal bitmap format:
 *
 * A bitmap contains one bit for every pixel that defines if that pixel is
 * black (1) or white (0). Bits within a byte are arranged vertically, LSB
 * at top.
 * The bytes are stored in row-major order, with byte 0 being top left,
 * byte 1 2nd from left etc. The first row of bytes defines pixel rows
 * 0..7, the second row defines pixel row 8..15 etc.
 *
 * This is the same as the internal lcd hw format. */

/* Draw a partial bitmap */
void ICODE_ATTR LCDFN(bitmap_part)(const unsigned char *src, int src_x,
                                   int src_y, int stride, int x, int y,
                                   int width, int height)
{
    struct viewport *vp = CURRENT_VP;
    int shift, ny;
    FBFN(data) *dst, *dst_end;
    int stride_dst;
    unsigned mask, mask_bottom;
    LCDFN(blockfunc_type) *bfunc;

    if (!LCDFN(clip_viewport_rect)(&x, &y, &width, &height, &src_x, &src_y))
        return;

    src    += stride * (src_y >> 3) + src_x; /* move starting point */
    src_y  &= 7;
    y      -= src_y;
    dst    = LCDFB(x,y>>3);
    stride_dst = vp->buffer->stride;
    shift  = y & 7;
    ny     = height - 1 + shift + src_y;

    bfunc  = LCDFN(blockfuncs)[vp->drawmode];
    mask   = 0xFFu << (shift + src_y);
    mask_bottom = 0xFFu >> (~ny & 7);

    if (shift == 0)
    {
        bool copyopt = (vp->drawmode == DRMODE_SOLID);

        for (; ny >= 8; ny -= 8)
        {
            if (copyopt && (mask == 0xFFu))
                memcpy(dst, src, width);
            else
            {
                const unsigned char *src_row = src;
                FBFN(data) *dst_row = dst;

                dst_end = dst_row + width;
                do
                    bfunc(dst_row++, mask, *src_row++);
                while (dst_row < dst_end);
            }

            src += stride;
            dst += stride_dst;
            mask = 0xFFu;
        }
        mask &= mask_bottom;

        if (copyopt && (mask == 0xFFu))
            memcpy(dst, src, width);
        else
        {
            dst_end = dst + width;
            do
                bfunc(dst++, mask, *src++);
            while (dst < dst_end);
        }
    }
    else
    {
        dst_end = dst + width;
        do
        {
            const unsigned char *src_col = src++;
            FBFN(data) *dst_col = dst++;
            unsigned mask_col = mask;
            unsigned data = 0;

            for (y = ny; y >= 8; y -= 8)
            {
                data |= *src_col << shift;

                if (mask_col & 0xFFu)
                {
                    bfunc(dst_col, mask_col, data);
                    mask_col = 0xFFu;
                }
                else
                    mask_col >>= 8;

                src_col += stride;
                dst_col += stride_dst;
                data >>= 8;
            }
            data |= *src_col << shift;
            bfunc(dst_col, mask_col & mask_bottom, data);
        }
        while (dst < dst_end);
    }
}

/* Draw a full bitmap */
void LCDFN(bitmap)(const unsigned char *src, int x, int y, int width,
                   int height)
{
    LCDFN(bitmap_part)(src, 0, 0, width, x, y, width, height);
}