All-new greyscale library, replacing the old one. Features: (1) Drawing/updating is faster than the old grayscale lib at full depth. (2) Always 129 shades instead of 2..33 shades. (3) No graininess caused by frequent updates (mpegplayer, doom, ...). (4) Needs less memory than the old grayscale lib at full depth. * The tradeoff is slightly higher CPU load in the ISR (frames are calculated 'live') and an extra function in the core. * Ported all plugins which used the graylib to use the new one. * Some slight optimisations for archos and H1x0 LCD update.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15998 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 358 insertions, 0 deletions

diff --git a/apps/plugins/lib/grey_scroll.c b/apps/plugins/lib/grey_scroll.c
new file mode 100644
index 0000000..80496e7
--- /dev/null
+++ b/apps/plugins/lib/grey_scroll.c
@@ -0,0 +1,358 @@
+/***************************************************************************
+*             __________               __   ___.
+*   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+*   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+*   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+*   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+*                     \/            \/     \/    \/            \/
+* $Id$
+*
+* New greyscale framework
+* Scrolling routines
+*
+* This is a generic framework to display 129 shades of grey on low-depth
+* bitmap LCDs (Archos b&w, Iriver & Ipod 4-grey) within plugins.
+*
+* Copyright (C) 2008 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"
+#include "grey.h"
+
+/*** Scrolling ***/
+
+/* Scroll left */
+void grey_scroll_left(int count)
+{
+    unsigned char *data, *data_end;
+    int length, blank;
+
+    if ((unsigned)count >= (unsigned)_grey_info.width)
+        return;
+
+    data = _grey_info.buffer;
+    data_end = data + _GREY_MULUQ(_grey_info.width, _grey_info.height);
+    length = _grey_info.width - count;
+    blank = (_grey_info.drawmode & DRMODE_INVERSEVID) ?
+             _grey_info.fg_val : _grey_info.bg_val;
+
+    do
+    {
+        _grey_rb->memmove(data, data + count, length);
+        _grey_rb->memset(data + length, blank, count);
+        data += _grey_info.width;
+    }
+    while (data < data_end);
+}
+
+/* Scroll right */
+void grey_scroll_right(int count)
+{
+    unsigned char *data, *data_end;
+    int length, blank;
+
+    if ((unsigned)count >= (unsigned)_grey_info.width)
+        return;
+
+    data = _grey_info.buffer;
+    data_end = data + _GREY_MULUQ(_grey_info.width, _grey_info.height);
+    length = _grey_info.width - count;
+    blank = (_grey_info.drawmode & DRMODE_INVERSEVID) ?
+             _grey_info.fg_val : _grey_info.bg_val;
+
+    do
+    {
+        _grey_rb->memmove(data + count, data, length);
+        _grey_rb->memset(data, blank, count);
+        data += _grey_info.width;
+    }
+    while (data < data_end);
+}
+
+/* Scroll up */
+void grey_scroll_up(int count)
+{
+    long shift, length;
+    int blank;
+
+    if ((unsigned)count >= (unsigned)_grey_info.height)
+        return;
+
+    shift = _GREY_MULUQ(_grey_info.width, count);
+    length = _GREY_MULUQ(_grey_info.width, _grey_info.height - count);
+    blank = (_grey_info.drawmode & DRMODE_INVERSEVID) ?
+             _grey_info.fg_val : _grey_info.bg_val;
+
+    _grey_rb->memmove(_grey_info.buffer, _grey_info.buffer + shift, length);
+    _grey_rb->memset(_grey_info.buffer + length, blank, shift);
+}
+
+/* Scroll down */
+void grey_scroll_down(int count)
+{
+    long shift, length;
+    int blank;
+
+    if ((unsigned)count >= (unsigned)_grey_info.height)
+        return;
+
+    shift = _GREY_MULUQ(_grey_info.width, count);
+    length = _GREY_MULUQ(_grey_info.width, _grey_info.height - count);
+    blank = (_grey_info.drawmode & DRMODE_INVERSEVID) ?
+             _grey_info.fg_val : _grey_info.bg_val;
+
+    _grey_rb->memmove(_grey_info.buffer + shift, _grey_info.buffer, length);
+    _grey_rb->memset(_grey_info.buffer, blank, shift);
+}
+
+/*** Unbuffered scrolling functions ***/
+
+#ifdef SIMULATOR
+
+/* Scroll left */
+void grey_ub_scroll_left(int count)
+{
+    grey_scroll_left(count);
+    grey_update();
+}
+
+/* Scroll right */
+void grey_ub_scroll_right(int count)
+{
+    grey_scroll_right(count);
+    grey_update();
+}
+
+/* Scroll up */
+void grey_ub_scroll_up(int count)
+{
+    grey_scroll_up(count);
+    grey_update();
+}
+
+/* Scroll down */
+void grey_ub_scroll_down(int count)
+{
+    grey_scroll_down(count);
+    grey_update();
+}
+
+#else /* !SIMULATOR */
+
+/* Scroll left */
+void grey_ub_scroll_left(int count)
+{
+    unsigned char *dst, *src, *end;
+    int blank, y, idx;
+
+    if ((count == 0) || ((unsigned)count >= (unsigned)_grey_info.width))
+        return;
+        
+    blank = (_grey_info.drawmode & DRMODE_INVERSEVID) ?
+             _grey_info.fg_val : _grey_info.bg_val;
+
+    for (y = 0; y < _grey_info.height; y++)
+    {
+#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
+        idx = _GREY_MULUQ(_grey_info.width, y);
+#else
+#if LCD_DEPTH == 1
+        idx = _GREY_MULUQ(_grey_info.width, y & ~7) + (~y & 7);
+#elif LCD_DEPTH == 2
+        idx = _GREY_MULUQ(_grey_info.width, y & ~3) + (~y & 3);
+#endif
+#endif /* LCD_PIXELFORMAT */
+        dst = &_grey_info.data[idx].value;
+        src = dst + count * _GREY_X_ADVANCE;
+        end = dst + _grey_info.width * _GREY_X_ADVANCE;
+        
+        do
+        {
+            *dst = *src;
+            dst += _GREY_X_ADVANCE;
+            src += _GREY_X_ADVANCE;
+        }
+        while (src < end);
+        
+        do
+        {
+            *dst = blank;
+            dst += _GREY_X_ADVANCE;
+        }
+        while (dst < end);
+    }
+}
+
+/* Scroll right */
+void grey_ub_scroll_right(int count)
+{
+    unsigned char *dst, *src, *start;
+    int blank, y, idx;
+
+    if ((count == 0) || ((unsigned)count >= (unsigned)_grey_info.width))
+        return;
+        
+    blank = (_grey_info.drawmode & DRMODE_INVERSEVID) ?
+             _grey_info.fg_val : _grey_info.bg_val;
+
+    for (y = 0; y < _grey_info.height; y++)
+    {
+#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
+        idx = _GREY_MULUQ(_grey_info.width, y);
+#else
+#if LCD_DEPTH == 1
+        idx = _GREY_MULUQ(_grey_info.width, y & ~7) + (~y & 7);
+#elif LCD_DEPTH == 2
+        idx = _GREY_MULUQ(_grey_info.width, y & ~3) + (~y & 3);
+#endif
+#endif /* LCD_PIXELFORMAT */
+        start = &_grey_info.data[idx].value;
+        dst = start + _grey_info.width * _GREY_X_ADVANCE;
+        src = dst - count * _GREY_X_ADVANCE;
+        
+        do 
+        {
+            dst -= _GREY_X_ADVANCE;
+            src -= _GREY_X_ADVANCE;
+            *dst = *src;
+        }
+        while (src > start);
+        
+        do
+        {
+            dst -= _GREY_X_ADVANCE;
+            *dst = blank;
+        }
+        while (dst > start);
+    }
+}
+
+void grey_ub_scroll_up(int count)
+{
+    unsigned char *dst, *dst_end, *src;
+    int blank, ys, yd, is, id;
+
+    if ((unsigned)count >= (unsigned)_grey_info.height)
+        return;
+        
+    blank = (_grey_info.drawmode & DRMODE_INVERSEVID) ?
+             _grey_info.fg_val : _grey_info.bg_val;
+
+    for (ys = count, yd = 0; ys < _grey_info.height; ys++, yd++)
+    {
+#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
+        id = _GREY_MULUQ(_grey_info.width, yd);
+        is = _GREY_MULUQ(_grey_info.width, ys);
+#else
+#if LCD_DEPTH == 1
+        id = _GREY_MULUQ(_grey_info.width, yd & ~7) + (~yd & 7);
+        is = _GREY_MULUQ(_grey_info.width, ys & ~7) + (~ys & 7);
+#elif LCD_DEPTH == 2
+        id = _GREY_MULUQ(_grey_info.width, yd & ~3) + (~yd & 3);
+        is = _GREY_MULUQ(_grey_info.width, ys & ~3) + (~ys & 3);
+#endif
+#endif /* LCD_PIXELFORMAT */
+        dst = &_grey_info.data[id].value;
+        src = &_grey_info.data[is].value;
+        dst_end = dst + _grey_info.width * _GREY_X_ADVANCE;
+
+        do
+        {
+            *dst = *src;
+            dst += _GREY_X_ADVANCE;
+            src += _GREY_X_ADVANCE;
+        }
+        while (dst < dst_end);
+    }
+    for (; yd < _grey_info.height; yd++)
+    {
+#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
+        id = _GREY_MULUQ(_grey_info.width, yd);
+#else
+#if LCD_DEPTH == 1
+        id = _GREY_MULUQ(_grey_info.width, yd & ~7) + (~yd & 7);
+#elif LCD_DEPTH == 2
+        id = _GREY_MULUQ(_grey_info.width, yd & ~3) + (~yd & 3);
+#endif
+#endif /* LCD_PIXELFORMAT */
+        dst = &_grey_info.data[id].value;
+        dst_end = dst + _grey_info.width * _GREY_X_ADVANCE;
+
+        do
+        {
+            *dst = blank;
+            dst += _GREY_X_ADVANCE;
+        }
+        while (dst < dst_end);
+    }
+}
+
+void grey_ub_scroll_down(int count)
+{
+    unsigned char *dst, *dst_end, *src;
+    int blank, ys, yd, is, id;
+
+    if ((unsigned)count >= (unsigned)_grey_info.height)
+        return;
+        
+    blank = (_grey_info.drawmode & DRMODE_INVERSEVID) ?
+             _grey_info.fg_val : _grey_info.bg_val;
+
+    yd = _grey_info.height - 1;
+    for (ys = yd - count; ys >= 0; ys--, yd--)
+    {
+#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
+        id = _GREY_MULUQ(_grey_info.width, yd);
+        is = _GREY_MULUQ(_grey_info.width, ys);
+#else
+#if LCD_DEPTH == 1
+        id = _GREY_MULUQ(_grey_info.width, yd & ~7) + (~yd & 7);
+        is = _GREY_MULUQ(_grey_info.width, ys & ~7) + (~ys & 7);
+#elif LCD_DEPTH == 2
+        id = _GREY_MULUQ(_grey_info.width, yd & ~3) + (~yd & 3);
+        is = _GREY_MULUQ(_grey_info.width, ys & ~3) + (~ys & 3);
+#endif
+#endif /* LCD_PIXELFORMAT */
+        dst = &_grey_info.data[id].value;
+        src = &_grey_info.data[is].value;
+        dst_end = dst + _grey_info.width * _GREY_X_ADVANCE;
+
+        do
+        {
+            *dst = *src;
+            dst += _GREY_X_ADVANCE;
+            src += _GREY_X_ADVANCE;
+        }
+        while (dst < dst_end);
+    }
+    for (; yd >= 0; yd--)
+    {
+#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
+        id = _GREY_MULUQ(_grey_info.width, yd);
+#else
+#if LCD_DEPTH == 1
+        id = _GREY_MULUQ(_grey_info.width, yd & ~7) + (~yd & 7);
+#elif LCD_DEPTH == 2
+        id = _GREY_MULUQ(_grey_info.width, yd & ~3) + (~yd & 3);
+#endif
+#endif /* LCD_PIXELFORMAT */
+        dst = &_grey_info.data[id].value;
+        dst_end = dst + _grey_info.width * _GREY_X_ADVANCE;
+
+        do
+        {
+            *dst = blank;
+            dst += _GREY_X_ADVANCE;
+        }
+        while (dst < dst_end);
+    }
+}
+
+#endif /* !SIMULATOR */