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1/***************************************************************************
2 * __________ __ ___.
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
7 * \/ \/ \/ \/ \/
8 * $Id$
9 *
10 * Copyright (C) 2005 by Dave Chapman
11 * Copyright (C) 2009 by Karl Kurbjun
12 *
13 * Rockbox driver for 16-bit colour LCDs
14 *
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License
17 * as published by the Free Software Foundation; either version 2
18 * of the License, or (at your option) any later version.
19 *
20 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
21 * KIND, either express or implied.
22 *
23 ****************************************************************************/
24
25#include <stdio.h>
26#include "config.h"
27
28#include "cpu.h"
29#include "lcd.h"
30#include "kernel.h"
31#include "thread.h"
32#include <stdlib.h>
33#include "string-extra.h" /* mem*() */
34#include "file.h"
35#include "debug.h"
36#include "system.h"
37#include "font.h"
38#include "rbunicode.h"
39#include "bidi.h"
40#include "scroll_engine.h"
41
42#define ROW_INC LCD_WIDTH
43#define COL_INC 1
44
45extern lcd_fastpixelfunc_type* const lcd_fastpixelfuncs_backdrop[];
46extern lcd_fastpixelfunc_type* const lcd_fastpixelfuncs_bgcolor[];
47
48static void ICODE_ATTR lcd_alpha_bitmap_part_mix(const fb_data* image,
49 const unsigned char *src, int src_x,
50 int src_y, int x, int y,
51 int width, int height,
52 int stride_image, int stride_src);
53
54#include "lcd-color-common.c"
55#include "lcd-bitmap-common.c"
56
57
58/* Clear the current viewport */
59void lcd_clear_viewport(void)
60{
61 fb_data *dst, *dst_end;
62 int x, y, width, height;
63 int len, step;
64
65 x = current_vp->x;
66 y = current_vp->y;
67 width = current_vp->width;
68 height = current_vp->height;
69
70#if defined(HAVE_VIEWPORT_CLIP)
71 /********************* Viewport on screen clipping ********************/
72 /* nothing to draw? */
73 if ((x >= LCD_WIDTH) || (y >= LCD_HEIGHT)
74 || (x + width <= 0) || (y + height <= 0))
75 return;
76
77 /* clip image in viewport in screen */
78 if (x < 0)
79 {
80 width += x;
81 x = 0;
82 }
83 if (y < 0)
84 {
85 height += y;
86 y = 0;
87 }
88 if (x + width > LCD_WIDTH)
89 width = LCD_WIDTH - x;
90 if (y + height > LCD_HEIGHT)
91 height = LCD_HEIGHT - y;
92#endif
93
94 len = STRIDE_MAIN(width, height);
95 step = STRIDE_MAIN(ROW_INC, COL_INC);
96
97 dst = FBADDR(x, y);
98 dst_end = FBADDR(x + width - 1 , y + height - 1);
99
100 if (current_vp->drawmode & DRMODE_INVERSEVID)
101 {
102 fb_data px = FB_SCALARPACK(current_vp->fg_pattern);
103 do
104 {
105 fb_data *end = dst + len;
106 do {
107 *dst++ = px;
108 } while (dst < end);
109 dst += step - len;
110 }
111 while (dst <= dst_end);
112 }
113 else
114 {
115 if (!lcd_backdrop)
116 {
117 fb_data px = FB_SCALARPACK(current_vp->bg_pattern);
118 do
119 {
120 fb_data *end = dst + len;
121 do {
122 *dst++ = px;
123 } while (dst < end);
124 dst += step - len;
125 }
126 while (dst <= dst_end);
127 }
128 else
129 {
130 do
131 {
132 memcpy(dst, (void *)((long)dst + lcd_backdrop_offset),
133 len * sizeof(fb_data));
134 dst += step;
135 }
136 while (dst <= dst_end);
137 }
138 }
139
140 if (current_vp == &default_vp)
141 lcd_scroll_stop();
142 else
143 lcd_scroll_stop_viewport(current_vp);
144}
145
146/*** low-level drawing functions ***/
147
148static void ICODE_ATTR setpixel(fb_data *address)
149{
150 *address = FB_SCALARPACK(current_vp->fg_pattern);
151}
152
153static void ICODE_ATTR clearpixel(fb_data *address)
154{
155 *address = FB_SCALARPACK(current_vp->bg_pattern);
156}
157
158static void ICODE_ATTR clearimgpixel(fb_data *address)
159{
160 *address = *(fb_data *)((long)address + lcd_backdrop_offset);
161}
162
163static void ICODE_ATTR flippixel(fb_data *address)
164{
165 unsigned px = FB_UNPACK_SCALAR_LCD(*address);
166 *address = FB_SCALARPACK(~px);
167}
168
169static void ICODE_ATTR nopixel(fb_data *address)
170{
171 (void)address;
172}
173
174lcd_fastpixelfunc_type* const lcd_fastpixelfuncs_bgcolor[8] = {
175 flippixel, nopixel, setpixel, setpixel,
176 nopixel, clearpixel, nopixel, clearpixel
177};
178
179lcd_fastpixelfunc_type* const lcd_fastpixelfuncs_backdrop[8] = {
180 flippixel, nopixel, setpixel, setpixel,
181 nopixel, clearimgpixel, nopixel, clearimgpixel
182};
183
184lcd_fastpixelfunc_type* const * lcd_fastpixelfuncs = lcd_fastpixelfuncs_bgcolor;
185
186/* Fill a rectangular area */
187void lcd_fillrect(int x, int y, int width, int height)
188{
189 enum fill_opt fillopt = OPT_NONE;
190 fb_data *dst, *dst_end;
191 int len, step;
192 fb_data bits = { 0 };
193
194 /******************** In viewport clipping **********************/
195 /* nothing to draw? */
196 if ((width <= 0) || (height <= 0) || (x >= current_vp->width) ||
197 (y >= current_vp->height) || (x + width <= 0) || (y + height <= 0))
198 return;
199
200 if (x < 0)
201 {
202 width += x;
203 x = 0;
204 }
205 if (y < 0)
206 {
207 height += y;
208 y = 0;
209 }
210 if (x + width > current_vp->width)
211 width = current_vp->width - x;
212 if (y + height > current_vp->height)
213 height = current_vp->height - y;
214
215 /* adjust for viewport */
216 x += current_vp->x;
217 y += current_vp->y;
218
219#if defined(HAVE_VIEWPORT_CLIP)
220 /********************* Viewport on screen clipping ********************/
221 /* nothing to draw? */
222 if ((x >= LCD_WIDTH) || (y >= LCD_HEIGHT)
223 || (x + width <= 0) || (y + height <= 0))
224 return;
225
226 /* clip image in viewport in screen */
227 if (x < 0)
228 {
229 width += x;
230 x = 0;
231 }
232 if (y < 0)
233 {
234 height += y;
235 y = 0;
236 }
237 if (x + width > LCD_WIDTH)
238 width = LCD_WIDTH - x;
239 if (y + height > LCD_HEIGHT)
240 height = LCD_HEIGHT - y;
241#endif
242
243 /* drawmode and optimisation */
244 if (current_vp->drawmode & DRMODE_INVERSEVID)
245 {
246 if (current_vp->drawmode & DRMODE_BG)
247 {
248 if (!lcd_backdrop)
249 {
250 fillopt = OPT_SET;
251 bits = FB_SCALARPACK(current_vp->bg_pattern);
252 }
253 else
254 fillopt = OPT_COPY;
255 }
256 }
257 else
258 {
259 if (current_vp->drawmode & DRMODE_FG)
260 {
261 fillopt = OPT_SET;
262 bits = FB_SCALARPACK(current_vp->fg_pattern);
263 }
264 }
265 if (fillopt == OPT_NONE && current_vp->drawmode != DRMODE_COMPLEMENT)
266 return;
267
268 dst = FBADDR(x, y);
269 dst_end = FBADDR(x + width - 1, y + height - 1);
270
271 len = STRIDE_MAIN(width, height);
272 step = STRIDE_MAIN(ROW_INC, COL_INC);
273
274 do
275 {
276 switch (fillopt)
277 {
278 case OPT_SET:
279 {
280 fb_data *start = dst;
281 fb_data *end = start + len;
282 do {
283 *start = bits;
284 } while (++start < end);
285 break;
286 }
287
288 case OPT_COPY:
289 memcpy(dst, (void *)((long)dst + lcd_backdrop_offset),
290 len * sizeof(fb_data));
291 break;
292
293 case OPT_NONE: /* DRMODE_COMPLEMENT */
294 {
295 fb_data *start = dst;
296 fb_data *end = start + len;
297 do {
298 flippixel(start);
299 } while (++start < end);
300 break;
301 }
302 }
303 dst += step;
304 }
305 while (dst <= dst_end);
306}
307
308/* About Rockbox' internal monochrome bitmap format:
309 *
310 * A bitmap contains one bit for every pixel that defines if that pixel is
311 * black (1) or white (0). Bits within a byte are arranged vertically, LSB
312 * at top.
313 * The bytes are stored in row-major order, with byte 0 being top left,
314 * byte 1 2nd from left etc. The first row of bytes defines pixel rows
315 * 0..7, the second row defines pixel row 8..15 etc.
316 *
317 * This is the mono bitmap format used on all other targets so far; the
318 * pixel packing doesn't really matter on a 8bit+ target. */
319
320/* Draw a partial monochrome bitmap */
321
322void ICODE_ATTR lcd_mono_bitmap_part(const unsigned char *src, int src_x,
323 int src_y, int stride, int x, int y,
324 int width, int height)
325{
326 const unsigned char *src_end;
327 fb_data *dst, *dst_col;
328 unsigned dmask = 0x100; /* bit 8 == sentinel */
329 int drmode = current_vp->drawmode;
330 int row;
331
332 /******************** Image in viewport clipping **********************/
333 /* nothing to draw? */
334 if ((width <= 0) || (height <= 0) || (x >= current_vp->width) ||
335 (y >= current_vp->height) || (x + width <= 0) || (y + height <= 0))
336 return;
337
338 if (x < 0)
339 {
340 width += x;
341 src_x -= x;
342 x = 0;
343 }
344 if (y < 0)
345 {
346 height += y;
347 src_y -= y;
348 y = 0;
349 }
350 if (x + width > current_vp->width)
351 width = current_vp->width - x;
352 if (y + height > current_vp->height)
353 height = current_vp->height - y;
354
355 /* adjust for viewport */
356 x += current_vp->x;
357 y += current_vp->y;
358
359#if defined(HAVE_VIEWPORT_CLIP)
360 /********************* Viewport on screen clipping ********************/
361 /* nothing to draw? */
362 if ((x >= LCD_WIDTH) || (y >= LCD_HEIGHT)
363 || (x + width <= 0) || (y + height <= 0))
364 return;
365
366 /* clip image in viewport in screen */
367 if (x < 0)
368 {
369 width += x;
370 src_x -= x;
371 x = 0;
372 }
373 if (y < 0)
374 {
375 height += y;
376 src_y -= y;
377 y = 0;
378 }
379 if (x + width > LCD_WIDTH)
380 width = LCD_WIDTH - x;
381 if (y + height > LCD_HEIGHT)
382 height = LCD_HEIGHT - y;
383#endif
384
385 src += stride * (src_y >> 3) + src_x; /* move starting point */
386 src_y &= 7;
387 src_end = src + width;
388 dst_col = FBADDR(x, y);
389
390
391 if (drmode & DRMODE_INVERSEVID)
392 {
393 dmask = 0x1ff; /* bit 8 == sentinel */
394 drmode &= DRMODE_SOLID; /* mask out inversevid */
395 }
396
397 /* Use extra bit to avoid if () in the switch-cases below */
398 if ((drmode & DRMODE_BG) && lcd_backdrop)
399 drmode |= DRMODE_INT_BD;
400
401 /* go through each column and update each pixel */
402 do
403 {
404 const unsigned char *src_col = src++;
405 unsigned data = (*src_col ^ dmask) >> src_y;
406 fb_data fg, bg;
407 uintptr_t bo;
408
409 dst = dst_col;
410 dst_col += COL_INC;
411 row = height;
412
413#define UPDATE_SRC do { \
414 data >>= 1; \
415 if (data == 0x001) { \
416 src_col += stride; \
417 data = *src_col ^ dmask; \
418 } \
419 } while (0)
420
421 switch (drmode)
422 {
423 case DRMODE_COMPLEMENT:
424 do
425 {
426 if (data & 0x01)
427 flippixel(dst);
428
429 dst += ROW_INC;
430 UPDATE_SRC;
431 }
432 while (--row);
433 break;
434
435 case DRMODE_BG|DRMODE_INT_BD:
436 bo = lcd_backdrop_offset;
437 do
438 {
439 if (!(data & 0x01))
440 *dst = *(fb_data *)((long)dst + bo);
441
442 dst += ROW_INC;
443 UPDATE_SRC;
444 }
445 while (--row);
446 break;
447
448 case DRMODE_BG:
449 bg = FB_SCALARPACK(current_vp->bg_pattern);
450 do
451 {
452 if (!(data & 0x01))
453 *dst = bg;
454
455 dst += ROW_INC;
456 UPDATE_SRC;
457 }
458 while (--row);
459 break;
460
461 case DRMODE_FG:
462 fg = FB_SCALARPACK(current_vp->fg_pattern);
463 do
464 {
465 if (data & 0x01)
466 *dst = fg;
467
468 dst += ROW_INC;
469 UPDATE_SRC;
470 }
471 while (--row);
472 break;
473
474 case DRMODE_SOLID|DRMODE_INT_BD:
475 fg = FB_SCALARPACK(current_vp->fg_pattern);
476 bo = lcd_backdrop_offset;
477 do
478 {
479 *dst = (data & 0x01) ? fg
480 : *(fb_data *)((long)dst + bo);
481 dst += ROW_INC;
482 UPDATE_SRC;
483 }
484 while (--row);
485 break;
486
487 case DRMODE_SOLID:
488 fg = FB_SCALARPACK(current_vp->fg_pattern);
489 bg = FB_SCALARPACK(current_vp->bg_pattern);
490 do
491 {
492 *dst = (data & 0x01) ? fg : bg;
493 dst += ROW_INC;
494 UPDATE_SRC;
495 }
496 while (--row);
497 break;
498 }
499 }
500 while (src < src_end);
501}
502/* Draw a full monochrome bitmap */
503void lcd_mono_bitmap(const unsigned char *src, int x, int y, int width, int height)
504{
505 lcd_mono_bitmap_part(src, 0, 0, width, x, y, width, height);
506}
507
508
509/* About Rockbox' internal alpha channel format (for ALPHA_COLOR_FONT_DEPTH == 2)
510 *
511 * For each pixel, 4bit of alpha information is stored in a byte-stream,
512 * so two pixels are packed into one byte.
513 * The lower nibble is the first pixel, the upper one the second. The stride is
514 * horizontal. E.g row0: pixel0: byte0[0:3], pixel1: byte0[4:7], pixel2: byte1[0:3],...
515 * The format is independant of the internal display orientation and color
516 * representation, as to support the same font files on all displays.
517 * The values go linear from 0 (fully opaque) to 15 (fully transparent)
518 * (note how this is the opposite of the alpha channel in the ARGB format).
519 *
520 * This might suggest that rows need to have an even number of pixels.
521 * However this is generally not the case. lcd_alpha_bitmap_part_mix() can deal
522 * with uneven colums (i.e. two rows can share one byte). And font files do
523 * exploit this.
524 * However, this is difficult to do for image files, especially bottom-up bitmaps,
525 * so lcd_bmp() do expect even rows.
526 */
527
528#define ALPHA_COLOR_FONT_DEPTH 2
529#define ALPHA_COLOR_LOOKUP_SHIFT (1 << ALPHA_COLOR_FONT_DEPTH)
530#define ALPHA_COLOR_LOOKUP_SIZE ((1 << ALPHA_COLOR_LOOKUP_SHIFT) - 1)
531#define ALPHA_COLOR_PIXEL_PER_BYTE (8 >> ALPHA_COLOR_FONT_DEPTH)
532#define ALPHA_COLOR_PIXEL_PER_WORD (32 >> ALPHA_COLOR_FONT_DEPTH)
533
534/* This is based on SDL (src/video/SDL_RLEaccel.c) ALPHA_BLIT32_888() macro */
535static inline fb_data blend_two_colors(unsigned c1, unsigned c2, unsigned a)
536{
537 unsigned s = c1;
538 unsigned d = c2;
539 unsigned s1 = s & 0xff00ff;
540 unsigned d1 = d & 0xff00ff;
541 a += a >> (ALPHA_COLOR_LOOKUP_SHIFT - 1);
542 d1 = (d1 + ((s1 - d1) * a >> ALPHA_COLOR_LOOKUP_SHIFT)) & 0xff00ff;
543 s &= 0xff00;
544 d &= 0xff00;
545 d = (d + ((s - d) * a >> ALPHA_COLOR_LOOKUP_SHIFT)) & 0xff00;
546
547 return FB_SCALARPACK(d1 | d);
548}
549
550/* Blend an image with an alpha channel
551 * if image is NULL, drawing will happen according to the drawmode
552 * src is the alpha channel (4bit per pixel) */
553static void ICODE_ATTR lcd_alpha_bitmap_part_mix(const fb_data* image,
554 const unsigned char *src, int src_x,
555 int src_y, int x, int y,
556 int width, int height,
557 int stride_image, int stride_src)
558{
559 fb_data *dst, *dst_row;
560 unsigned dmask = 0x00000000;
561 int drmode = current_vp->drawmode;
562 /* nothing to draw? */
563 if ((width <= 0) || (height <= 0) || (x >= current_vp->width) ||
564 (y >= current_vp->height) || (x + width <= 0) || (y + height <= 0))
565 return;
566
567 /* clipping */
568 if (x < 0)
569 {
570 width += x;
571 src_x -= x;
572 x = 0;
573 }
574 if (y < 0)
575 {
576 height += y;
577 src_y -= y;
578 y = 0;
579 }
580 if (x + width > current_vp->width)
581 width = current_vp->width - x;
582 if (y + height > current_vp->height)
583 height = current_vp->height - y;
584
585 /* adjust for viewport */
586 x += current_vp->x;
587 y += current_vp->y;
588
589#if defined(HAVE_VIEWPORT_CLIP)
590 /********************* Viewport on screen clipping ********************/
591 /* nothing to draw? */
592 if ((x >= LCD_WIDTH) || (y >= LCD_HEIGHT)
593 || (x + width <= 0) || (y + height <= 0))
594 return;
595
596 /* clip image in viewport in screen */
597 if (x < 0)
598 {
599 width += x;
600 src_x -= x;
601 x = 0;
602 }
603 if (y < 0)
604 {
605 height += y;
606 src_y -= y;
607 y = 0;
608 }
609 if (x + width > LCD_WIDTH)
610 width = LCD_WIDTH - x;
611 if (y + height > LCD_HEIGHT)
612 height = LCD_HEIGHT - y;
613#endif
614
615 /* the following drawmode combinations are possible:
616 * 1) COMPLEMENT: just negates the framebuffer contents
617 * 2) BG and BG+backdrop: draws _only_ background pixels with either
618 * the background color or the backdrop (if any). The backdrop
619 * is an image in native lcd format
620 * 3) FG and FG+image: draws _only_ foreground pixels with either
621 * the foreground color or an image buffer. The image is in
622 * native lcd format
623 * 4) SOLID, SOLID+backdrop, SOLID+image, SOLID+backdrop+image, i.e. all
624 * possible combinations of 2) and 3). Draws both, fore- and background,
625 * pixels. The rules of 2) and 3) apply.
626 *
627 * INVERSEVID swaps fore- and background pixels, i.e. background pixels
628 * become foreground ones and vice versa.
629 */
630 if (drmode & DRMODE_INVERSEVID)
631 {
632 dmask = 0xffffffff;
633 drmode &= DRMODE_SOLID; /* mask out inversevid */
634 }
635
636 /* Use extra bits to avoid if () in the switch-cases below */
637 if (image != NULL)
638 drmode |= DRMODE_INT_IMG;
639
640 if ((drmode & DRMODE_BG) && lcd_backdrop)
641 drmode |= DRMODE_INT_BD;
642
643 dst_row = FBADDR(x, y);
644
645 int col, row = height;
646 unsigned data, pixels;
647 unsigned skip_end = (stride_src - width);
648 unsigned skip_start = src_y * stride_src + src_x;
649 unsigned skip_start_image = STRIDE_MAIN(src_y * stride_image + src_x,
650 src_x * stride_image + src_y);
651
652#ifdef ALPHA_BITMAP_READ_WORDS
653 uint32_t *src_w = (uint32_t *)((uintptr_t)src & ~3);
654 skip_start += ALPHA_COLOR_PIXEL_PER_BYTE * ((uintptr_t)src & 3);
655 src_w += skip_start / ALPHA_COLOR_PIXEL_PER_WORD;
656 data = letoh32(*src_w++) ^ dmask;
657 pixels = skip_start % ALPHA_COLOR_PIXEL_PER_WORD;
658#else
659 src += skip_start / ALPHA_COLOR_PIXEL_PER_BYTE;
660 data = *src ^ dmask;
661 pixels = skip_start % ALPHA_COLOR_PIXEL_PER_BYTE;
662#endif
663 data >>= pixels * ALPHA_COLOR_LOOKUP_SHIFT;
664#ifdef ALPHA_BITMAP_READ_WORDS
665 pixels = 8 - pixels;
666#endif
667
668 /* image is only accessed in DRMODE_INT_IMG cases, i.e. when non-NULL.
669 * Therefore NULL accesses are impossible and we can increment
670 * unconditionally (applies for stride at the end of the loop as well) */
671 image += skip_start_image;
672 /* go through the rows and update each pixel */
673 do
674 {
675 /* saving current_vp->fg/bg_pattern and lcd_backdrop_offset into these
676 * temp vars just before the loop helps gcc to opimize the loop better
677 * (testing showed ~15% speedup) */
678 unsigned fg, bg;
679 ptrdiff_t bo, img_offset;
680 col = width;
681 dst = dst_row;
682 dst_row += ROW_INC;
683#ifdef ALPHA_BITMAP_READ_WORDS
684#define UPDATE_SRC_ALPHA do { \
685 if (--pixels) \
686 data >>= ALPHA_COLOR_LOOKUP_SHIFT; \
687 else \
688 { \
689 data = letoh32(*src_w++) ^ dmask; \
690 pixels = ALPHA_COLOR_PIXEL_PER_WORD; \
691 } \
692 } while (0)
693#elif ALPHA_COLOR_PIXEL_PER_BYTE == 2
694#define UPDATE_SRC_ALPHA do { \
695 if (pixels ^= 1) \
696 data >>= ALPHA_COLOR_LOOKUP_SHIFT; \
697 else \
698 data = *(++src) ^ dmask; \
699 } while (0)
700#else
701#define UPDATE_SRC_ALPHA do { \
702 if (pixels = (++pixels % ALPHA_COLOR_PIXEL_PER_BYTE)) \
703 data >>= ALPHA_COLOR_LOOKUP_SHIFT; \
704 else \
705 data = *(++src) ^ dmask; \
706 } while (0)
707#endif
708
709 switch (drmode)
710 {
711 case DRMODE_COMPLEMENT:
712 do
713 {
714 unsigned px = FB_UNPACK_SCALAR_LCD(*dst);
715 *dst = blend_two_colors(px, ~px,
716 data & ALPHA_COLOR_LOOKUP_SIZE );
717 dst += COL_INC;
718 UPDATE_SRC_ALPHA;
719 }
720 while (--col);
721 break;
722 case DRMODE_BG|DRMODE_INT_BD:
723 bo = lcd_backdrop_offset;
724 do
725 {
726 unsigned px = FB_UNPACK_SCALAR_LCD(*dst);
727 unsigned c = FB_UNPACK_SCALAR_LCD(*(fb_data *)((uintptr_t)dst + bo));
728 *dst = blend_two_colors(c, px, data & ALPHA_COLOR_LOOKUP_SIZE );
729 dst += COL_INC;
730 image += STRIDE_MAIN(1, stride_image);
731 UPDATE_SRC_ALPHA;
732 }
733 while (--col);
734 break;
735 case DRMODE_BG:
736 bg = current_vp->bg_pattern;
737 do
738 {
739 unsigned px = FB_UNPACK_SCALAR_LCD(*dst);
740 *dst = blend_two_colors(bg, px, data & ALPHA_COLOR_LOOKUP_SIZE );
741 dst += COL_INC;
742 UPDATE_SRC_ALPHA;
743 }
744 while (--col);
745 break;
746 case DRMODE_FG|DRMODE_INT_IMG:
747 img_offset = image - dst;
748 do
749 {
750 unsigned px1 = FB_UNPACK_SCALAR_LCD(*dst);
751 unsigned px2 = FB_UNPACK_SCALAR_LCD(*(dst + img_offset));
752 *dst = blend_two_colors(px1, px2, data & ALPHA_COLOR_LOOKUP_SIZE );
753 dst += COL_INC;
754 UPDATE_SRC_ALPHA;
755 }
756 while (--col);
757 break;
758 case DRMODE_FG:
759 fg = current_vp->fg_pattern;
760 do
761 {
762 unsigned px = FB_UNPACK_SCALAR_LCD(*dst);
763 *dst = blend_two_colors(px, fg, data & ALPHA_COLOR_LOOKUP_SIZE );
764 dst += COL_INC;
765 UPDATE_SRC_ALPHA;
766 }
767 while (--col);
768 break;
769 case DRMODE_SOLID|DRMODE_INT_BD:
770 bo = lcd_backdrop_offset;
771 fg = current_vp->fg_pattern;
772 do
773 {
774 unsigned c = FB_UNPACK_SCALAR_LCD(*(fb_data *)((uintptr_t)dst + bo));
775 *dst = blend_two_colors(c, fg, data & ALPHA_COLOR_LOOKUP_SIZE );
776 dst += COL_INC;
777 UPDATE_SRC_ALPHA;
778 }
779 while (--col);
780 break;
781 case DRMODE_SOLID|DRMODE_INT_IMG:
782 bg = current_vp->bg_pattern;
783 img_offset = image - dst;
784 do
785 {
786 unsigned c = FB_UNPACK_SCALAR_LCD(*(dst + img_offset));
787 *dst = blend_two_colors(bg, c, data & ALPHA_COLOR_LOOKUP_SIZE );
788 dst += COL_INC;
789 UPDATE_SRC_ALPHA;
790 }
791 while (--col);
792 break;
793 case DRMODE_SOLID|DRMODE_INT_BD|DRMODE_INT_IMG:
794 bo = lcd_backdrop_offset;
795 img_offset = image - dst;
796 do
797 {
798 unsigned px = FB_UNPACK_SCALAR_LCD(*(fb_data *)((uintptr_t)dst + bo));
799 unsigned c = FB_UNPACK_SCALAR_LCD(*(dst + img_offset));
800 *dst = blend_two_colors(px, c, data & ALPHA_COLOR_LOOKUP_SIZE );
801 dst += COL_INC;
802 UPDATE_SRC_ALPHA;
803 }
804 while (--col);
805 break;
806 case DRMODE_SOLID:
807 bg = current_vp->bg_pattern;
808 fg = current_vp->fg_pattern;
809 do
810 {
811 *dst = blend_two_colors(bg, fg, data & ALPHA_COLOR_LOOKUP_SIZE );
812 dst += COL_INC;
813 UPDATE_SRC_ALPHA;
814 }
815 while (--col);
816 break;
817 }
818#ifdef ALPHA_BITMAP_READ_WORDS
819 if (skip_end < pixels)
820 {
821 pixels -= skip_end;
822 data >>= skip_end * ALPHA_COLOR_LOOKUP_SHIFT;
823 } else {
824 pixels = skip_end - pixels;
825 src_w += pixels / ALPHA_COLOR_PIXEL_PER_WORD;
826 pixels %= ALPHA_COLOR_PIXEL_PER_WORD;
827 data = letoh32(*src_w++) ^ dmask;
828 data >>= pixels * ALPHA_COLOR_LOOKUP_SHIFT;
829 pixels = 8 - pixels;
830 }
831#else
832 if (skip_end)
833 {
834 pixels += skip_end;
835 if (pixels >= ALPHA_COLOR_PIXEL_PER_BYTE)
836 {
837 src += pixels / ALPHA_COLOR_PIXEL_PER_BYTE;
838 pixels %= ALPHA_COLOR_PIXEL_PER_BYTE;
839 data = *src ^ dmask;
840 data >>= pixels * ALPHA_COLOR_LOOKUP_SHIFT;
841 } else
842 data >>= skip_end * ALPHA_COLOR_LOOKUP_SHIFT;
843 }
844#endif
845
846 image += STRIDE_MAIN(stride_image,1);
847 } while (--row);
848}
849
850/*** drawing functions ***/
851
852/* Draw a horizontal line (optimised) */
853void lcd_hline(int x1, int x2, int y)
854{
855 int x, width;
856 fb_data *dst, *dst_end;
857 lcd_fastpixelfunc_type *pfunc = lcd_fastpixelfuncs[current_vp->drawmode];
858
859 /* direction flip */
860 if (x2 < x1)
861 {
862 x = x1;
863 x1 = x2;
864 x2 = x;
865 }
866
867 /******************** In viewport clipping **********************/
868 /* nothing to draw? */
869 if (((unsigned)y >= (unsigned)current_vp->height) ||
870 (x1 >= current_vp->width) ||
871 (x2 < 0))
872 return;
873
874 if (x1 < 0)
875 x1 = 0;
876 if (x2 >= current_vp->width)
877 x2 = current_vp->width-1;
878
879 /* Adjust x1 and y to viewport */
880 x1 += current_vp->x;
881 x2 += current_vp->x;
882 y += current_vp->y;
883
884#if defined(HAVE_VIEWPORT_CLIP)
885 /********************* Viewport on screen clipping ********************/
886 /* nothing to draw? */
887 if (((unsigned)y >= (unsigned) LCD_HEIGHT) || (x1 >= LCD_WIDTH)
888 || (x2 < 0))
889 return;
890
891 /* clipping */
892 if (x1 < 0)
893 x1 = 0;
894 if (x2 >= LCD_WIDTH)
895 x2 = LCD_WIDTH-1;
896#endif
897
898 width = x2 - x1 + 1;
899
900 dst = FBADDR(x1 , y);
901 dst_end = dst + width;
902 do
903 {
904 pfunc(dst);
905 }
906 while (++dst < dst_end);
907}
908
909/* Draw a vertical line (optimised) */
910void lcd_vline(int x, int y1, int y2)
911{
912 int y;
913 fb_data *dst, *dst_end;
914 lcd_fastpixelfunc_type *pfunc = lcd_fastpixelfuncs[current_vp->drawmode];
915
916 /* direction flip */
917 if (y2 < y1)
918 {
919 y = y1;
920 y1 = y2;
921 y2 = y;
922 }
923
924 /******************** In viewport clipping **********************/
925 /* nothing to draw? */
926 if (((unsigned)x >= (unsigned)current_vp->width) ||
927 (y1 >= current_vp->height) ||
928 (y2 < 0))
929 return;
930
931 if (y1 < 0)
932 y1 = 0;
933 if (y2 >= current_vp->height)
934 y2 = current_vp->height-1;
935
936 /* adjust for viewport */
937 x += current_vp->x;
938 y1 += current_vp->y;
939 y2 += current_vp->y;
940
941#if defined(HAVE_VIEWPORT_CLIP)
942 /********************* Viewport on screen clipping ********************/
943 /* nothing to draw? */
944 if (( (unsigned) x >= (unsigned)LCD_WIDTH) || (y1 >= LCD_HEIGHT)
945 || (y2 < 0))
946 return;
947
948 /* clipping */
949 if (y1 < 0)
950 y1 = 0;
951 if (y2 >= LCD_HEIGHT)
952 y2 = LCD_HEIGHT-1;
953#endif
954
955 dst = FBADDR(x , y1);
956 dst_end = dst + (y2 - y1) * LCD_WIDTH;
957
958 do
959 {
960 pfunc(dst);
961 dst += LCD_WIDTH;
962 }
963 while (dst <= dst_end);
964}
965
966/* Draw a partial native bitmap */
967void ICODE_ATTR lcd_bitmap_part(const fb_data *src, int src_x, int src_y,
968 int stride, int x, int y, int width,
969 int height)
970{
971 fb_data *dst;
972
973 /******************** Image in viewport clipping **********************/
974 /* nothing to draw? */
975 if ((width <= 0) || (height <= 0) || (x >= current_vp->width) ||
976 (y >= current_vp->height) || (x + width <= 0) || (y + height <= 0))
977 return;
978
979 if (x < 0)
980 {
981 width += x;
982 src_x -= x;
983 x = 0;
984 }
985 if (y < 0)
986 {
987 height += y;
988 src_y -= y;
989 y = 0;
990 }
991
992 if (x + width > current_vp->width)
993 width = current_vp->width - x;
994 if (y + height > current_vp->height)
995 height = current_vp->height - y;
996
997 /* adjust for viewport */
998 x += current_vp->x;
999 y += current_vp->y;
1000
1001#if defined(HAVE_VIEWPORT_CLIP)
1002 /********************* Viewport on screen clipping ********************/
1003 /* nothing to draw? */
1004 if ((x >= LCD_WIDTH) || (y >= LCD_HEIGHT)
1005 || (x + width <= 0) || (y + height <= 0))
1006 return;
1007
1008 /* clip image in viewport in screen */
1009 if (x < 0)
1010 {
1011 width += x;
1012 src_x -= x;
1013 x = 0;
1014 }
1015 if (y < 0)
1016 {
1017 height += y;
1018 src_y -= y;
1019 y = 0;
1020 }
1021 if (x + width > LCD_WIDTH)
1022 width = LCD_WIDTH - x;
1023 if (y + height > LCD_HEIGHT)
1024 height = LCD_HEIGHT - y;
1025#endif
1026
1027 src += stride * src_y + src_x; /* move starting point */
1028 dst = FBADDR(x, y);
1029
1030 do
1031 {
1032 memcpy(dst, src, width * sizeof(fb_data));
1033 src += stride;
1034 dst += LCD_WIDTH;
1035 }
1036 while (--height > 0);
1037}
1038
1039/* Draw a partial native bitmap with transparency and foreground colors */
1040void ICODE_ATTR lcd_bitmap_transparent_part(const fb_data *src, int src_x,
1041 int src_y, int stride, int x,
1042 int y, int width, int height)
1043{
1044 fb_data *dst;
1045 fb_data fg, transparent, replacewithfg;
1046
1047 /******************** Image in viewport clipping **********************/
1048 /* nothing to draw? */
1049 if ((width <= 0) || (height <= 0) || (x >= current_vp->width) ||
1050 (y >= current_vp->height) || (x + width <= 0) || (y + height <= 0))
1051 return;
1052
1053 if (x < 0)
1054 {
1055 width += x;
1056 src_x -= x;
1057 x = 0;
1058 }
1059 if (y < 0)
1060 {
1061 height += y;
1062 src_y -= y;
1063 y = 0;
1064 }
1065
1066 if (x + width > current_vp->width)
1067 width = current_vp->width - x;
1068 if (y + height > current_vp->height)
1069 height = current_vp->height - y;
1070
1071 /* adjust for viewport */
1072 x += current_vp->x;
1073 y += current_vp->y;
1074
1075#if defined(HAVE_VIEWPORT_CLIP)
1076 /********************* Viewport on screen clipping ********************/
1077 /* nothing to draw? */
1078 if ((x >= LCD_WIDTH) || (y >= LCD_HEIGHT)
1079 || (x + width <= 0) || (y + height <= 0))
1080 return;
1081
1082 /* clip image in viewport in screen */
1083 if (x < 0)
1084 {
1085 width += x;
1086 src_x -= x;
1087 x = 0;
1088 }
1089 if (y < 0)
1090 {
1091 height += y;
1092 src_y -= y;
1093 y = 0;
1094 }
1095 if (x + width > LCD_WIDTH)
1096 width = LCD_WIDTH - x;
1097 if (y + height > LCD_HEIGHT)
1098 height = LCD_HEIGHT - y;
1099#endif
1100
1101 src += stride * src_y + src_x; /* move starting point */
1102 dst = FBADDR(x, y);
1103
1104 transparent = FB_SCALARPACK(TRANSPARENT_COLOR);
1105 replacewithfg = FB_SCALARPACK(REPLACEWITHFG_COLOR);
1106 fg = FB_SCALARPACK(current_vp->fg_pattern);
1107#define CMP(c1, c2) (c1.r == c2.r && c1.g == c2.g && c1.b == c2.b)
1108
1109 do
1110 {
1111 const fb_data *src_row = src;
1112 fb_data *dst_row = dst;
1113 fb_data *row_end = dst_row + width;
1114 do
1115 {
1116 fb_data data = *src_row++;
1117 if (!CMP(data, transparent))
1118 {
1119 if (CMP(data, replacewithfg))
1120 data = fg;
1121 *dst_row = data;
1122 }
1123 }
1124 while (++dst_row < row_end);
1125 src += stride;
1126 dst += LCD_WIDTH;
1127 }
1128 while (--height > 0);
1129}
generated by cgit v1.2.3 (git 2.39.1) at 2024-09-24 23:14:50 +0000