/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * $Id$ * * Greyscale framework * Core & miscellaneous functions * * This is a generic framework to display up to 33 shades of grey * on low-depth bitmap LCDs (Archos b&w, Iriver 4-grey) within plugins. * * Copyright (C) 2004-2006 Jens Arnold * * All files in this archive are subject to the GNU General Public License. * See the file COPYING in the source tree root for full license agreement. * * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY * KIND, either express or implied. * ****************************************************************************/ #include "plugin.h" #ifdef HAVE_LCD_BITMAP #include "gray.h" /* Global variables */ struct plugin_api *_gray_rb = NULL; /* global api struct pointer */ struct _gray_info _gray_info; /* global info structure */ #ifndef SIMULATOR short _gray_random_buffer; /* buffer for random number generator */ #if CONFIG_LCD == LCD_SSD1815 /* measured and interpolated curve */ static const unsigned char lcdlinear[256] = { 0, 3, 5, 8, 11, 13, 16, 18, 21, 23, 26, 28, 31, 33, 36, 38, 40, 42, 45, 47, 49, 51, 53, 55, 57, 59, 60, 62, 64, 66, 67, 69, 70, 72, 73, 74, 76, 77, 78, 79, 81, 82, 83, 84, 85, 86, 87, 88, 88, 89, 90, 91, 92, 92, 93, 94, 95, 95, 96, 97, 97, 98, 99, 99, 100, 101, 102, 102, 103, 104, 104, 105, 106, 106, 107, 107, 108, 109, 109, 110, 111, 111, 112, 113, 113, 114, 114, 115, 116, 116, 117, 117, 118, 119, 119, 120, 120, 121, 121, 122, 122, 123, 123, 124, 124, 125, 125, 126, 126, 127, 127, 128, 128, 128, 129, 129, 130, 130, 131, 131, 132, 132, 133, 133, 133, 134, 134, 135, 135, 136, 136, 137, 137, 138, 138, 138, 139, 139, 140, 140, 141, 141, 142, 142, 143, 143, 144, 144, 145, 145, 146, 146, 147, 147, 148, 148, 148, 149, 149, 150, 150, 151, 151, 152, 152, 153, 153, 153, 154, 154, 155, 155, 156, 156, 157, 157, 158, 158, 158, 159, 159, 160, 160, 161, 161, 162, 162, 163, 163, 164, 164, 165, 165, 166, 167, 167, 168, 168, 169, 169, 170, 171, 171, 172, 173, 173, 174, 175, 176, 176, 177, 178, 179, 180, 181, 181, 182, 183, 184, 185, 186, 188, 189, 190, 191, 192, 194, 195, 196, 198, 199, 201, 202, 204, 205, 207, 209, 211, 213, 215, 217, 219, 222, 224, 226, 229, 231, 234, 236, 239, 242, 244, 247, 250, 252, 255 }; #elif CONFIG_LCD == LCD_S1D15E06 /* measured and interpolated curve */ static const unsigned char lcdlinear[256] = { 0, 5, 11, 16, 21, 27, 32, 37, 42, 47, 51, 56, 60, 64, 68, 72, 75, 78, 81, 84, 87, 89, 91, 93, 95, 96, 98, 99, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 111, 112, 113, 113, 114, 115, 115, 116, 117, 117, 118, 118, 119, 119, 120, 120, 121, 121, 122, 122, 123, 123, 124, 124, 125, 125, 126, 126, 127, 127, 127, 128, 128, 129, 129, 130, 130, 131, 131, 132, 132, 133, 133, 134, 134, 135, 135, 136, 136, 137, 137, 138, 138, 138, 139, 139, 140, 140, 141, 141, 141, 142, 142, 143, 143, 143, 144, 144, 145, 145, 145, 146, 146, 146, 147, 147, 147, 148, 148, 149, 149, 149, 150, 150, 150, 151, 151, 151, 152, 152, 153, 153, 153, 154, 154, 155, 155, 155, 156, 156, 157, 157, 157, 158, 158, 159, 159, 159, 160, 160, 161, 161, 162, 162, 162, 163, 163, 164, 164, 164, 165, 165, 166, 166, 167, 167, 167, 168, 168, 169, 169, 170, 170, 170, 171, 171, 172, 172, 173, 173, 174, 174, 175, 175, 176, 176, 177, 177, 178, 178, 179, 179, 180, 180, 181, 182, 182, 183, 184, 184, 185, 186, 186, 187, 188, 188, 189, 190, 191, 191, 192, 193, 194, 195, 196, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 213, 214, 215, 216, 218, 219, 220, 222, 223, 225, 227, 228, 230, 232, 233, 235, 237, 239, 241, 243, 245, 247, 249, 251, 253, 255 }; #endif #else /* SIMULATOR */ /* undo a (generic) PC display gamma of 2.0 to simulate target behaviour */ static const unsigned char lcdlinear[256] = { 0, 16, 23, 28, 32, 36, 39, 42, 45, 48, 50, 53, 55, 58, 60, 62, 64, 66, 68, 70, 71, 73, 75, 77, 78, 80, 81, 83, 84, 86, 87, 89, 90, 92, 93, 94, 96, 97, 98, 100, 101, 102, 103, 105, 106, 107, 108, 109, 111, 112, 113, 114, 115, 116, 117, 118, 119, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 145, 146, 147, 148, 149, 150, 151, 151, 152, 153, 154, 155, 156, 156, 157, 158, 159, 160, 160, 161, 162, 163, 164, 164, 165, 166, 167, 167, 168, 169, 170, 170, 171, 172, 173, 173, 174, 175, 176, 176, 177, 178, 179, 179, 180, 181, 181, 182, 183, 183, 184, 185, 186, 186, 187, 188, 188, 189, 190, 190, 191, 192, 192, 193, 194, 194, 195, 196, 196, 197, 198, 198, 199, 199, 200, 201, 201, 202, 203, 203, 204, 204, 205, 206, 206, 207, 208, 208, 209, 209, 210, 211, 211, 212, 212, 213, 214, 214, 215, 215, 216, 217, 217, 218, 218, 219, 220, 220, 221, 221, 222, 222, 223, 224, 224, 225, 225, 226, 226, 227, 228, 228, 229, 229, 230, 230, 231, 231, 232, 233, 233, 234, 234, 235, 235, 236, 236, 237, 237, 238, 238, 239, 240, 240, 241, 241, 242, 242, 243, 243, 244, 244, 245, 245, 246, 246, 247, 247, 248, 248, 249, 249, 250, 250, 251, 251, 252, 252, 253, 253, 254, 254, 255 }; #endif /* SIMULATOR */ /* Prototypes */ static inline void _deferred_update(void) __attribute__ ((always_inline)); #ifdef SIMULATOR static unsigned long _gray_get_pixel(int x, int y); #else static void _timer_isr(void); #endif static void gray_screendump_hook(int fd); /* Update LCD areas not covered by the greyscale overlay */ static inline void _deferred_update(void) { int x1 = MAX(_gray_info.x, 0); int x2 = MIN(_gray_info.x + _gray_info.width, LCD_WIDTH); int y1 = MAX(_gray_info.by << _PBLOCK_EXP, 0); int y2 = MIN((_gray_info.by << _PBLOCK_EXP) + _gray_info.height, LCD_HEIGHT); if (y1 > 0) /* refresh part above overlay, full width */ _gray_rb->lcd_update_rect(0, 0, LCD_WIDTH, y1); if (y2 < LCD_HEIGHT) /* refresh part below overlay, full width */ _gray_rb->lcd_update_rect(0, y2, LCD_WIDTH, LCD_HEIGHT - y2); if (x1 > 0) /* refresh part to the left of overlay */ _gray_rb->lcd_update_rect(0, y1, x1, y2 - y1); if (x2 < LCD_WIDTH) /* refresh part to the right of overlay */ _gray_rb->lcd_update_rect(x2, y1, LCD_WIDTH - x2, y2 - y1); } #ifndef SIMULATOR /* Timer interrupt handler: display next bitplane */ static void _timer_isr(void) { _gray_rb->lcd_blit(_gray_info.plane_data + MULU16(_gray_info.plane_size, _gray_info.cur_plane), _gray_info.x, _gray_info.by, _gray_info.width, _gray_info.bheight, _gray_info.width); if (++_gray_info.cur_plane >= _gray_info.depth) _gray_info.cur_plane = 0; if (_gray_info.flags & _GRAY_DEFERRED_UPDATE) /* lcd_update() requested? */ { _deferred_update(); _gray_info.flags &= ~_GRAY_DEFERRED_UPDATE; /* clear request */ } } #endif /* !SIMULATOR */ /* fixed point exp() */ static int exp_s16p16(int x) { int t; int y = 0x00010000; if (x == 0) { return y; } else if (x > 0) { t = x - 0x58b91; if (t >= 0) x = t, y <<= 8; t = x - 0x2c5c8; if (t >= 0) x = t, y <<= 4; t = x - 0x162e4; if (t >= 0) x = t, y <<= 2; t = x - 0x0b172; if (t >= 0) x = t, y <<= 1; } else { t = x + 0x58b91; if (t < 0) x = t, y >>= 8; t = x + 0x2c5c8; if (t < 0) x = t, y >>= 4; t = x + 0x162e4; if (t < 0) x = t, y >>= 2; t = x + 0x0b172; if (t < 0) x = t, y >>= 1; x += 0x0b172; y >>= 1; } t = x - 0x067cd; if (t >= 0) x = t, y += y >> 1; t = x - 0x03920; if (t >= 0) x = t, y += y >> 2; t = x - 0x01e27; if (t >= 0) x = t, y += y >> 3; t = x - 0x00f85; if (t >= 0) x = t, y += y >> 4; t = x - 0x007e1; if (t >= 0) x = t, y += y >> 5; t = x - 0x003f8; if (t >= 0) x = t, y += y >> 6; t = x - 0x001fe; if (t >= 0) x = t, y += y >> 7; y += ((y >> 8) * x) >> 8; return y; } /* fixed point log() */ int log_s16p16(int x) { int t; int y = 0xa65af; if (x < 0x00008000) x <<=16, y -= 0xb1721; if (x < 0x00800000) x <<= 8, y -= 0x58b91; if (x < 0x08000000) x <<= 4, y -= 0x2c5c8; if (x < 0x20000000) x <<= 2, y -= 0x162e4; if (x < 0x40000000) x <<= 1, y -= 0x0b172; t = x + (x >> 1); if ((t & 0x80000000) == 0) x = t, y -= 0x067cd; t = x + (x >> 2); if ((t & 0x80000000) == 0) x = t, y -= 0x03920; t = x + (x >> 3); if ((t & 0x80000000) == 0) x = t, y -= 0x01e27; t = x + (x >> 4); if ((t & 0x80000000) == 0) x = t, y -= 0x00f85; t = x + (x >> 5); if ((t & 0x80000000) == 0) x = t, y -= 0x007e1; t = x + (x >> 6); if ((t & 0x80000000) == 0) x = t, y -= 0x003f8; t = x + (x >> 7); if ((t & 0x80000000) == 0) x = t, y -= 0x001fe; x = 0x80000000 - x; y -= x >> 15; return y; } /* Initialise the framework and prepare the greyscale display buffer arguments: newrb = pointer to plugin api gbuf = pointer to the memory area to use (e.g. plugin buffer) gbuf_size = max usable size of the buffer buffered = use chunky pixel buffering with delta buffer? This allows to use all drawing functions, but needs more memory. Unbuffered operation provides only a subset of drawing functions. (only gray_bitmap drawing and scrolling) width = width in pixels (1..LCD_WIDTH) bheight = height in LCD pixel-block units (8 pixels) (1..LCD_HEIGHT/8) depth = number of bitplanes to use (1..32). gamma = gamma value as s8p8 fixed point. gamma <= 0 means no correction at all, i.e. no LCD linearisation as well. result: = depth if there was enough memory < depth if there wasn't enough memory. The number of displayable shades is smaller than desired, but it still works = 0 if there wasn't even enough memory for 1 bitplane You can request any depth in the allowed range, not just powers of 2. The routine performs "graceful degradation" if the memory is not sufficient for the desired depth. As long as there is at least enough memory for 1 bitplane, it creates as many bitplanes as fit into memory, although 1 bitplane won't deliver an enhancement over the native display. The number of displayable shades is calculated as follows: shades = depth + 1 If you need info about the memory taken by the greyscale buffer, supply a long* as the last parameter. This long will then contain the number of bytes used. The total memory needed can be calculated as follows: total_mem = shades * sizeof(long) (bitpatterns) + (width * bheight) * depth (bitplane data) + buffered ? (chunky front- & backbuffer) (width * bheight * 8 * 2) : 0 + 0..3 (longword alignment) The function tries to be as authentic as possible regarding memory usage on the simulator, even if it doesn't use all of the allocated memory. There's one situation where it will consume more memory on the sim than on the target: if you're allocating a low depth (< 8) without buffering. */ int gray_init(struct plugin_api* newrb, unsigned char *gbuf, long gbuf_size, bool buffered, int width, int bheight, int depth, int gamma, long *buf_taken) { int possible_depth, i; long plane_size, buftaken; unsigned data; #ifndef SIMULATOR int j; #endif _gray_rb = newrb; if ((unsigned) width > LCD_WIDTH || (unsigned) bheight > (LCD_HEIGHT/_PBLOCK) || depth < 1) return 0; /* the buffer has to be long aligned */ buftaken = (-(long)gbuf) & 3; gbuf += buftaken; /* chunky front- & backbuffer */ if (buffered) { plane_size = MULU16(width, bheight << _PBLOCK_EXP); buftaken += 2 * plane_size; if (buftaken > gbuf_size) return 0; _gray_info.cur_buffer = gbuf; gbuf += plane_size; /* set backbuffer to 0xFF to guarantee the initial full update */ _gray_rb->memset(gbuf, 0xFF, plane_size); _gray_info.back_buffer = gbuf; gbuf += plane_size; } plane_size = MULU16(width, bheight); possible_depth = (gbuf_size - buftaken - sizeof(long)) / (plane_size + sizeof(long)); if (possible_depth < 1) return 0; depth = MIN(depth, 32); depth = MIN(depth, possible_depth); #ifdef SIMULATOR if (!buffered) { long orig_size = depth * plane_size + (depth + 1) * sizeof(long); plane_size = MULU16(width, bheight << _PBLOCK_EXP); if (plane_size > orig_size) { buftaken += plane_size; if (buftaken > gbuf_size) return 0; } else { buftaken += orig_size; } _gray_info.cur_buffer = gbuf; } else #endif buftaken += depth * plane_size + (depth + 1) * sizeof(long); _gray_info.x = 0; _gray_info.by = 0; _gray_info.width = width; _gray_info.height = bheight << _PBLOCK_EXP; _gray_info.bheight = bheight; _gray_info.depth = depth; _gray_info.flags = 0; #ifndef SIMULATOR _gray_info.cur_plane = 0; _gray_info.plane_size = plane_size; _gray_info.plane_data = gbuf; gbuf += depth * plane_size; _gray_info.bitpattern = (unsigned long *)gbuf; i = depth - 1; j = 8; while (i != 0) { i >>= 1; j--; } _gray_info.randmask = 0xFFu >> j; /* Precalculate the bit patterns for all possible pixel values */ for (i = 0; i <= depth; i++) { unsigned long pattern = 0; int value = 0; for (j = 0; j < depth; j++) { pattern <<= 1; value += i; if (value >= depth) value -= depth; /* "white" bit */ else pattern |= 1; /* "black" bit */ } /* now the lower bits contain the pattern */ _gray_info.bitpattern[i] = pattern; } #endif /* precalculate the value -> pattern index conversion table, taking linearisation and gamma correction into account */ if (gamma <= 0) { for (i = 0; i < 256; i++) { data = MULU16(depth, i) + 127; _gray_info.idxtable[i] = (data + (data >> 8)) >> 8; /* approx. data / 255 */ } } else { for (i = 0; i < 256; i++) { data = exp_s16p16((gamma * log_s16p16(i * 257 + 1)) >> 8) + 128; data = (data - (data >> 8)) >> 8; /* approx. data /= 257 */ data = MULU16(depth, lcdlinear[data]) + 127; _gray_info.idxtable[i] = (data + (data >> 8)) >> 8; /* approx. data / 255 */ } } _gray_info.fg_index = 0; _gray_info.bg_index = depth; _gray_info.fg_brightness = 0; _gray_info.bg_brightness = 255; _gray_info.drawmode = DRMODE_SOLID; _gray_info.curfont = FONT_SYSFIXED; if (buf_taken) /* caller requested info about space taken */ *buf_taken = buftaken; return depth; } /* Release the greyscale display buffer and the library DO CALL either this function or at least gray_show_display(false) before you exit, otherwise nasty things may happen. */ void gray_release(void) { gray_show(false); } /* Switch the greyscale overlay on or off DO NOT call lcd_update() or any other api function that directly accesses the lcd while the greyscale overlay is running! If you need to do lcd_update() to update something outside the greyscale overlay area, use gray_deferred_update() instead. Other functions to avoid are: lcd_blit() (obviously), lcd_update_rect(), lcd_set_contrast(), lcd_set_invert_display(), lcd_set_flip(), lcd_roll() */ void gray_show(bool enable) { if (enable && !(_gray_info.flags & _GRAY_RUNNING)) { _gray_info.flags |= _GRAY_RUNNING; #ifdef SIMULATOR _gray_rb->sim_lcd_ex_init(_gray_info.depth + 1, _gray_get_pixel); gray_update(); #else /* !SIMULATOR */ #if CONFIG_LCD == LCD_SSD1815 _gray_rb->timer_register(1, NULL, TIMER_FREQ / 67, 1, _timer_isr); #elif CONFIG_LCD == LCD_S1D15E06 _gray_rb->timer_register(1, NULL, TIMER_FREQ / 70, 1, _timer_isr); #elif CONFIG_LCD == LCD_IFP7XX /* TODO: implement for iFP */ (void)_timer_isr; #endif /* CONFIG_LCD */ #endif /* !SIMULATOR */ _gray_rb->screen_dump_set_hook(gray_screendump_hook); } else if (!enable && (_gray_info.flags & _GRAY_RUNNING)) { #ifdef SIMULATOR _gray_rb->sim_lcd_ex_init(0, NULL); #else _gray_rb->timer_unregister(); #endif _gray_info.flags &= ~_GRAY_RUNNING; _gray_rb->screen_dump_set_hook(NULL); _gray_rb->lcd_update(); /* restore whatever there was before */ } } #ifdef SIMULATOR /* Callback function for gray_update_rect() to read a pixel from the graybuffer. Note that x and y are in LCD coordinates, not graybuffer coordinates! */ static unsigned long _gray_get_pixel(int x, int y) { return _gray_info.cur_buffer[MULU16(x - _gray_info.x, _gray_info.height) + y - (_gray_info.by << _PBLOCK_EXP)] + (1 << LCD_DEPTH); } /* Update a rectangular area of the greyscale overlay */ void gray_update_rect(int x, int y, int width, int height) { if (x + width > _gray_info.width) width = _gray_info.width - x; if (y + height > _gray_info.height) height = _gray_info.height - y; x += _gray_info.x; y += _gray_info.by << _PBLOCK_EXP; if (x + width > LCD_WIDTH) width = LCD_WIDTH - x; if (y + height > LCD_HEIGHT) height = LCD_HEIGHT - y; _gray_rb->sim_lcd_ex_update_rect(x, y, width, height); } #else /* !SIMULATOR */ /* Update a rectangular area of the greyscale overlay */ void gray_update_rect(int x, int y, int width, int height) { int ymax; long srcofs; unsigned char *dst; if (width <= 0) return; /* nothing to do */ /* The Y coordinates have to work on whole pixel block rows */ ymax = (y + height - 1) >> _PBLOCK_EXP; y >>= _PBLOCK_EXP; if (x + width > _gray_info.width) width = _gray_info.width - x; if (ymax >= _gray_info.bheight) ymax = _gray_info.bheight - 1; srcofs = (y << _PBLOCK_EXP) + MULU16(_gray_info.height, x); dst = _gray_info.plane_data + MULU16(_gray_info.width, y) + x; /* Copy specified rectange bitmap to hardware */ for (; y <= ymax; y++) { long srcofs_row = srcofs; unsigned char *dst_row = dst; unsigned char *dst_end = dst_row + width; do { #if (CONFIG_CPU == SH7034) && (LCD_DEPTH == 1) unsigned long pat_stack[8]; unsigned long *pat_ptr; unsigned char *cbuf, *bbuf; unsigned change; cbuf = _gray_info.cur_buffer + srcofs_row; bbuf = _gray_info.back_buffer + srcofs_row; asm volatile ( "mov.l @%[cbuf]+,r1 \n" "mov.l @%[bbuf]+,r2 \n" "xor r1,r2 \n" "mov.l @%[cbuf],r1 \n" "mov.l @%[bbuf],%[chg] \n" "xor r1,%[chg] \n" "or r2,%[chg] \n" : /* outputs */ [cbuf]"+r"(cbuf), [bbuf]"+r"(bbuf), [chg] "=r"(change) : /* inputs */ : /* clobbers */ "r1", "r2" ); if (change != 0) { unsigned char *addr, *end; unsigned mask, trash; pat_ptr = &pat_stack[8]; cbuf = _gray_info.cur_buffer + srcofs_row; bbuf = _gray_info.back_buffer + srcofs_row; /* precalculate the bit patterns with random shifts * for all 8 pixels and put them on an extra "stack" */ asm volatile ( "mov #8,r3 \n" /* loop count in r3: 8 pixels */ ".ur_pre_loop: \n" "mov.b @%[cbuf]+,r0\n" /* read current buffer */ "mov.b @%[bbuf],r1 \n" /* read back buffer */ "mov #0,r2 \n" /* preset for skipped pixel */ "mov.b r0,@%[bbuf] \n" /* update back buffer */ "add #1,%[bbuf] \n" "cmp/eq r0,r1 \n" /* no change? */ "bt .ur_skip \n" /* -> skip */ "shll2 r0 \n" /* pixel value -> pattern offset */ "mov.l @(r0,%[bpat]),r4\n" /* r4 = bitpattern[byte]; */ "mov #75,r0 \n" "mulu r0,%[rnd] \n" /* multiply by 75 */ "sts macl,%[rnd] \n" "add #74,%[rnd] \n" /* add another 74 */ /* Since the lower bits are not very random: */ "swap.b %[rnd],r1 \n" /* get bits 8..15 (need max. 5) */ "and %[rmsk],r1 \n" /* mask out unneeded bits */ "cmp/hs %[dpth],r1 \n" /* random >= depth ? */ "bf .ur_ntrim \n" "sub %[dpth],r1 \n" /* yes: random -= depth; */ ".ur_ntrim: \n" "mov.l .ashlsi3,r0 \n" /** rotate pattern **/ "jsr @r0 \n" /* r4 -> r0, shift left by r5 */ "mov r1,r5 \n" "mov %[dpth],r5 \n" "sub r1,r5 \n" /* r5 = depth - r1 */ "mov.l .lshrsi3,r1 \n" "jsr @r1 \n" /* r4 -> r0, shift right by r5 */ "mov r0,r2 \n" /* store previous result in r2 */ "or r0,r2 \n" /* rotated_pattern = r2 | r0 */ "clrt \n" /* mask bit = 0 (replace) */ ".ur_skip: \n" /* T == 1 if skipped */ "rotcr %[mask] \n" /* get mask bit */ "mov.l r2,@-%[patp]\n" /* push on pattern stack */ "add #-1,r3 \n" /* decrease loop count */ "cmp/pl r3 \n" /* loop count > 0? */ "bt .ur_pre_loop\n" /* yes: loop */ "shlr8 %[mask] \n" "shlr16 %[mask] \n" : /* outputs */ [cbuf]"+r"(cbuf), [bbuf]"+r"(bbuf), [rnd] "+r"(_gray_random_buffer), [patp]"+r"(pat_ptr), [mask]"=&r"(mask) : /* inputs */ [dpth]"r"(_gray_info.depth), [bpat]"r"(_gray_info.bitpattern), [rmsk]"r"(_gray_info.randmask) : /* clobbers */ "r0", "r1", "r2", "r3", "r4", "r5", "macl", "pr" ); addr = dst_row; end = addr + MULU16(_gray_info.depth, _gray_info.plane_size); /* set the bits for all 8 pixels in all bytes according to the * precalculated patterns on the pattern stack */ asm volatile ( "mov.l @%[patp]+,r1\n" /* pop all 8 patterns */ "mov.l @%[patp]+,r2\n" "mov.l @%[patp]+,r3\n" "mov.l @%[patp]+,r6\n" "mov.l @%[patp]+,r7\n" "mov.l @%[patp]+,r8\n" "mov.l @%[patp]+,r9\n" "mov.l @%[patp],r10\n" "tst %[mask],%[mask] \n" /* nothing to keep? */ "bt .ur_sloop \n" /* yes: jump to short loop */ ".ur_floop: \n" /** full loop (there are bits to keep)**/ "shlr r1 \n" /* rotate lsb of pattern 1 to t bit */ "rotcl r0 \n" /* rotate t bit into r0 */ "shlr r2 \n" "rotcl r0 \n" "shlr r3 \n" "rotcl r0 \n" "shlr r6 \n" "rotcl r0 \n" "shlr r7 \n" "rotcl r0 \n" "shlr r8 \n" "rotcl r0 \n" "shlr r9 \n" "rotcl r0 \n" "shlr r10 \n" "mov.b @%[addr],%[rx] \n" /* read old value */ "rotcl r0 \n" "and %[mask],%[rx] \n" /* mask out unneeded bits */ "or %[rx],r0 \n" /* set new bits */ "mov.b r0,@%[addr] \n" /* store value to bitplane */ "add %[psiz],%[addr] \n" /* advance to next bitplane */ "cmp/hi %[addr],%[end] \n" /* last bitplane done? */ "bt .ur_floop \n" /* no: loop */ "bra .ur_end \n" "nop \n" /* References to C library routines used in the precalc block */ ".align 2 \n" ".ashlsi3: \n" /* C library routine: */ ".long ___ashlsi3 \n" /* shift r4 left by r5, res. in r0 */ ".lshrsi3: \n" /* C library routine: */ ".long ___lshrsi3 \n" /* shift r4 right by r5, res. in r0 */ /* both routines preserve r4, destroy r5 and take ~16 cycles */ ".ur_sloop: \n" /** short loop (nothing to keep) **/ "shlr r1 \n" /* rotate lsb of pattern 1 to t bit */ "rotcl r0 \n" /* rotate t bit into r0 */ "shlr r2 \n" "rotcl r0 \n" "shlr r3 \n" "rotcl r0 \n" "shlr r6 \n" "rotcl r0 \n" "shlr r7 \n" "rotcl r0 \n" "shlr r8 \n" "rotcl r0 \n" "shlr r9 \n" "rotcl r0 \n" "shlr r10 \n" "rotcl r0 \n" "mov.b r0,@%[addr] \n" /* store byte to bitplane */ "add %[psiz],%[addr] \n" /* advance to next bitplane */ "cmp/hi %[addr],%[end] \n" /* last bitplane done? */ "bt .ur_sloop \n" /* no: loop */ ".ur_end: \n" : /* outputs */ [addr]"+r"(addr), [mask]"+r"(mask), [rx] "=&r"(trash) : /* inputs */ [psiz]"r"(_gray_info.plane_size), [end] "r"(end), [patp]"[rx]"(pat_ptr) : /* clobbers */ "r0", "r1", "r2", "r3", "r6", "r7", "r8", "r9", "r10" ); } #elif defined(CPU_COLDFIRE) && (LCD_DEPTH == 2) unsigned long pat_stack[8]; unsigned long *pat_ptr; unsigned char *cbuf, *bbuf; unsigned change; cbuf = _gray_info.cur_buffer + srcofs_row; bbuf = _gray_info.back_buffer + srcofs_row; asm volatile ( "move.l (%[cbuf])+,%%d0 \n" "move.l (%[bbuf])+,%%d1 \n" "eor.l %%d0,%%d1 \n" "move.l (%[cbuf]),%%d0 \n" "move.l (%[bbuf]),%[chg]\n" "eor.l %%d0,%[chg] \n" "or.l %%d1,%[chg] \n" : /* outputs */ [cbuf]"+a"(cbuf), [bbuf]"+a"(bbuf), [chg] "=&d"(change) : /* inputs */ : /* clobbers */ "d0", "d1" ); if (change != 0) { unsigned char *addr, *end; unsigned mask, trash; pat_ptr = &pat_stack[8]; cbuf = _gray_info.cur_buffer + srcofs_row; bbuf = _gray_info.back_buffer + srcofs_row; /* precalculate the bit patterns with random shifts * for all 8 pixels and put them on an extra "stack" */ asm volatile ( "moveq.l #8,%%d3 \n" /* loop count in d3: 8 pixels */ "clr.l %[mask] \n" ".ur_pre_loop: \n" "clr.l %%d0 \n" "move.b (%[cbuf])+,%%d0 \n" /* read current buffer */ "clr.l %%d1 \n" "move.b (%[bbuf]),%%d1 \n" /* read back buffer */ "move.b %%d0,(%[bbuf])+ \n" /* update back buffer */ "clr.l %%d2 \n" /* preset for skipped pixel */ "cmp.l %%d0,%%d1 \n" /* no change? */ "beq.b .ur_skip \n" /* -> skip */ "move.l (%%d0:l:4,%[bpat]),%%d2 \n" /* d2 = bitpattern[byte]; */ "mulu.w #75,%[rnd] \n" /* multiply by 75 */ "add.l #74,%[rnd] \n" /* add another 74 */ /* Since the lower bits are not very random: */ "move.l %[rnd],%%d1 \n" "lsr.l #8,%%d1 \n" /* get bits 8..15 (need max. 5) */ "and.l %[rmsk],%%d1\n" /* mask out unneeded bits */ "cmp.l %[dpth],%%d1\n" /* random >= depth ? */ "blo.b .ur_ntrim \n" "sub.l %[dpth],%%d1\n" /* yes: random -= depth; */ ".ur_ntrim: \n" "move.l %%d2,%%d0 \n" "lsl.l %%d1,%%d0 \n" "sub.l %[dpth],%%d1\n" "neg.l %%d1 \n" /* d1 = depth - d1 */ "lsr.l %%d1,%%d2 \n" "or.l %%d0,%%d2 \n" /* rotated_pattern = d2 | d0 */ "or.l #0x0100,%[mask] \n" /* set mask bit */ ".ur_skip: \n" "lsr.l #1,%[mask] \n" /* shift mask */ "move.l %%d2,-(%[patp]) \n" /* push on pattern stack */ "subq.l #1,%%d3 \n" /* decrease loop count */ "bne.b .ur_pre_loop\n" /* yes: loop */ : /* outputs */ [cbuf]"+a"(cbuf), [bbuf]"+a"(bbuf), [patp]"+a"(pat_ptr), [rnd] "+d"(_gray_random_buffer), [mask]"=&d"(mask) : /* inputs */ [bpat]"a"(_gray_info.bitpattern), [dpth]"d"(_gray_info.depth), [rmsk]"d"(_gray_info.randmask) : /* clobbers */ "d0", "d1", "d2", "d3" ); addr = dst_row; end = addr + MULU16(_gray_info.depth, _gray_info.plane_size); /* set the bits for all 8 pixels in all bytes according to the * precalculated patterns on the pattern stack */ asm volatile ( "movem.l (%[patp]),%%d2-%%d6/%%a0-%%a1/%[ax] \n" /* pop all 8 patterns */ "not.l %[mask] \n" /* set mask -> keep mask */ "and.l #0xFF,%[mask] \n" "beq.b .ur_sstart \n" /* yes: jump to short loop */ ".ur_floop: \n" /** full loop (there are bits to keep)**/ "clr.l %%d0 \n" "lsr.l #1,%%d2 \n" /* shift out mask bit */ "addx.l %%d0,%%d0 \n" /* puts bit into LSB, shifts left by 1 */ "lsr.l #1,%%d3 \n" "addx.l %%d0,%%d0 \n" "lsr.l #1,%%d4 \n" "addx.l %%d0,%%d0 \n" "lsr.l #1,%%d5 \n" "addx.l %%d0,%%d0 \n" "lsr.l #1,%%d6 \n" "addx.l %%d0,%%d0 \n" "move.l %%a0,%%d1 \n" "lsr.l #1,%%d1 \n" "addx.l %%d0,%%d0 \n" "move.l %%d1,%%a0 \n" "move.l %%a1,%%d1 \n" "lsr.l #1,%%d1 \n" "addx.l %%d0,%%d0 \n" "move.l %%d1,%%a1 \n" "move.l %[ax],%%d1 \n" "lsr.l #1,%%d1 \n" "addx.l %%d0,%%d0 \n" "move.l %%d1,%[ax] \n" "move.b (%[addr]),%%d1 \n" /* read old value */ "and.l %[mask],%%d1 \n" /* mask out unneeded bits */ "or.l %%d0,%%d1 \n" /* set new bits */ "move.b %%d1,(%[addr]) \n" /* store value to bitplane */ "add.l %[psiz],%[addr] \n" /* advance to next bitplane */ "cmp.l %[addr],%[end] \n" /* last bitplane done? */ "bhi.b .ur_floop \n" /* no: loop */ "bra.b .ur_end \n" ".ur_sstart: \n" "move.l %%a0,%[mask]\n" /* mask isn't needed here, reuse reg */ ".ur_sloop: \n" /** short loop (nothing to keep) **/ "clr.l %%d0 \n" "lsr.l #1,%%d2 \n" /* shift out mask bit */ "addx.l %%d0,%%d0 \n" /* puts bit into LSB, shifts left by 1 */ "lsr.l #1,%%d3 \n" "addx.l %%d0,%%d0 \n" "lsr.l #1,%%d4 \n" "addx.l %%d0,%%d0 \n" "lsr.l #1,%%d5 \n" "addx.l %%d0,%%d0 \n" "lsr.l #1,%%d6 \n" "addx.l %%d0,%%d0 \n" "lsr.l #1,%[mask] \n" "addx.l %%d0,%%d0 \n" "move.l %%a1,%%d1 \n" "lsr.l #1,%%d1 \n" "addx.l %%d0,%%d0 \n" "move.l %%d1,%%a1 \n" "move.l %[ax],%%d1 \n" "lsr.l #1,%%d1 \n" "addx.l %%d0,%%d0 \n" "move.l %%d1,%[ax] \n" "move.b %%d0,(%[addr]) \n" /* store byte to bitplane */ "add.l %[psiz],%[addr] \n" /* advance to next bitplane */ "cmp.l %[addr],%[end] \n" /* last bitplane done? */ "bhi.b .ur_sloop \n" /* no: loop */ ".ur_end: \n" : /* outputs */ [addr]"+a"(addr), [mask]"+d"(mask), [ax] "=&a"(trash) : /* inputs */ [psiz]"a"(_gray_info.plane_size), [end] "a"(end), [patp]"[ax]"(pat_ptr) : /* clobbers */ "d0", "d1", "d2", "d3", "d4", "d5", "d6", "a0", "a1" ); } #endif /* CONFIG_CPU, LCD_DEPTH */ srcofs_row += _gray_info.height; dst_row++; } while (dst_row < dst_end); srcofs += _PBLOCK; dst += _gray_info.width; } } #endif /* !SIMULATOR */ /* Update the whole greyscale overlay */ void gray_update(void) { gray_update_rect(0, 0, _gray_info.width, _gray_info.height); } /* Do an lcd_update() to show changes done by rb->lcd_xxx() functions (in areas of the screen not covered by the greyscale overlay). */ void gray_deferred_lcd_update(void) { if (_gray_info.flags & _GRAY_RUNNING) { #ifdef SIMULATOR _deferred_update(); #else _gray_info.flags |= _GRAY_DEFERRED_UPDATE; #endif } else _gray_rb->lcd_update(); } /*** Screenshot ***/ #define BMP_FIXEDCOLORS (1 << LCD_DEPTH) #define BMP_VARCOLORS 33 #define BMP_NUMCOLORS (BMP_FIXEDCOLORS + BMP_VARCOLORS) #define BMP_BPP 8 #define BMP_LINESIZE ((LCD_WIDTH + 3) & ~3) #define BMP_HEADERSIZE (54 + 4 * BMP_NUMCOLORS) #define BMP_DATASIZE (BMP_LINESIZE * LCD_HEIGHT) #define BMP_TOTALSIZE (BMP_HEADERSIZE + BMP_DATASIZE) #define LE16_CONST(x) (x)&0xff, ((x)>>8)&0xff #define LE32_CONST(x) (x)&0xff, ((x)>>8)&0xff, ((x)>>16)&0xff, ((x)>>24)&0xff static const unsigned char bmpheader[] = { 0x42, 0x4d, /* 'BM' */ LE32_CONST(BMP_TOTALSIZE), /* Total file size */ 0x00, 0x00, 0x00, 0x00, /* Reserved */ LE32_CONST(BMP_HEADERSIZE), /* Offset to start of pixel data */ 0x28, 0x00, 0x00, 0x00, /* Size of (2nd) header */ LE32_CONST(LCD_WIDTH), /* Width in pixels */ LE32_CONST(LCD_HEIGHT), /* Height in pixels */ 0x01, 0x00, /* Number of planes (always 1) */ LE16_CONST(BMP_BPP), /* Bits per pixel 1/4/8/16/24 */ 0x00, 0x00, 0x00, 0x00, /* Compression mode, 0 = none */ LE32_CONST(BMP_DATASIZE), /* Size of bitmap data */ 0xc4, 0x0e, 0x00, 0x00, /* Horizontal resolution (pixels/meter) */ 0xc4, 0x0e, 0x00, 0x00, /* Vertical resolution (pixels/meter) */ LE32_CONST(BMP_NUMCOLORS), /* Number of used colours */ LE32_CONST(BMP_NUMCOLORS), /* Number of important colours */ /* Fixed colours */ #if LCD_DEPTH == 1 0x90, 0xee, 0x90, 0x00, /* Colour #0 */ 0x00, 0x00, 0x00, 0x00 /* Colour #1 */ #elif LCD_DEPTH == 2 0xe6, 0xd8, 0xad, 0x00, /* Colour #0 */ 0x99, 0x90, 0x73, 0x00, /* Colour #1 */ 0x4c, 0x48, 0x39, 0x00, /* Colour #2 */ 0x00, 0x00, 0x00, 0x00 /* Colour #3 */ #endif }; #if LCD_DEPTH == 1 #define BMP_RED 0x90 #define BMP_GREEN 0xee #define BMP_BLUE 0x90 #elif LCD_DEPTH == 2 #define BMP_RED 0xad #define BMP_GREEN 0xd8 #define BMP_BLUE 0xe6 #endif /* Hook function for core screen_dump() to save the current display content (b&w and greyscale overlay) to an 8-bit BMP file. */ static void gray_screendump_hook(int fd) { int i; int x, y, by; int gx, gy, mask; #if LCD_DEPTH == 2 int shift; #endif unsigned char *clut_entry; unsigned char *lcdptr; unsigned char linebuf[MAX(4*BMP_VARCOLORS,BMP_LINESIZE)]; _gray_rb->write(fd, bmpheader, sizeof(bmpheader)); /* write header */ /* build clut */ _gray_rb->memset(linebuf, 0, 4*BMP_VARCOLORS); clut_entry = linebuf; for (i = _gray_info.depth; i > 0; i--) { *clut_entry++ = MULU16(BMP_BLUE, i) / _gray_info.depth; *clut_entry++ = MULU16(BMP_GREEN, i) / _gray_info.depth; *clut_entry++ = MULU16(BMP_RED, i) / _gray_info.depth; clut_entry++; } _gray_rb->write(fd, linebuf, 4*BMP_VARCOLORS); /* BMP image goes bottom -> top */ for (y = LCD_HEIGHT - 1; y >= 0; y--) { _gray_rb->memset(linebuf, 0, BMP_LINESIZE); gy = y - (_gray_info.by << _PBLOCK_EXP); #if LCD_DEPTH == 1 mask = 1 << (y & (_PBLOCK-1)); by = y >> _PBLOCK_EXP; lcdptr = _gray_rb->lcd_framebuffer + MULU16(LCD_WIDTH, by); if ((unsigned) gy < (unsigned) _gray_info.height) { /* line contains greyscale (and maybe b&w) graphics */ #ifndef SIMULATOR unsigned char *grayptr = _gray_info.plane_data + MULU16(_gray_info.width, gy >> _PBLOCK_EXP); #endif for (x = 0; x < LCD_WIDTH; x++) { gx = x - _gray_info.x; if ((unsigned)gx < (unsigned)_gray_info.width) { #ifdef SIMULATOR linebuf[x] = BMP_FIXEDCOLORS + _gray_info.depth - _gray_info.cur_buffer[MULU16(gx, _gray_info.height) + gy]; #else int idx = BMP_FIXEDCOLORS; unsigned char *grayptr2 = grayptr + gx; for (i = _gray_info.depth; i > 0; i--) { if (*grayptr2 & mask) idx++; grayptr2 += _gray_info.plane_size; } linebuf[x] = idx; #endif } else { linebuf[x] = (*lcdptr & mask) ? 1 : 0; } lcdptr++; } } else { /* line contains only b&w graphics */ for (x = 0; x < LCD_WIDTH; x++) linebuf[x] = (*lcdptr++ & mask) ? 1 : 0; } #elif LCD_DEPTH == 2 shift = 2 * (y & 3); by = y >> 2; lcdptr = _gray_rb->lcd_framebuffer + MULU16(LCD_WIDTH, by); if ((unsigned)gy < (unsigned)_gray_info.height) { /* line contains greyscale (and maybe b&w) graphics */ #ifdef SIMULATOR (void)mask; #else unsigned char *grayptr = _gray_info.plane_data + MULU16(_gray_info.width, gy >> _PBLOCK_EXP); mask = 1 << (gy & (_PBLOCK-1)); #endif for (x = 0; x < LCD_WIDTH; x++) { gx = x - _gray_info.x; if ((unsigned)gx < (unsigned)_gray_info.width) { #ifdef SIMULATOR linebuf[x] = BMP_FIXEDCOLORS + _gray_info.depth - _gray_info.cur_buffer[MULU16(gx, _gray_info.height) + gy]; #else int idx = BMP_FIXEDCOLORS; unsigned char *grayptr2 = grayptr + gx; for (i = _gray_info.depth; i > 0; i--) { if (*grayptr2 & mask) idx++; grayptr2 += _gray_info.plane_size; } linebuf[x] = idx; #endif } else { linebuf[x] = (*lcdptr >> shift) & 3; } lcdptr++; } } else { /* line contains only b&w graphics */ for (x = 0; x < LCD_WIDTH; x++) linebuf[x] = (*lcdptr++ >> shift) & 3; } #endif /* LCD_DEPTH */ _gray_rb->write(fd, linebuf, BMP_LINESIZE); } } #endif /* HAVE_LCD_BITMAP */