6a972e0249
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@8845 a1c6a512-1295-4272-9138-f99709370657
111 lines
3.2 KiB
C
111 lines
3.2 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Greyscale framework
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* Parameter handling
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*
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* This is a generic framework to display up to 33 shades of grey
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* on low-depth bitmap LCDs (Archos b&w, Iriver 4-grey) within plugins.
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*
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* Copyright (C) 2004-2006 Jens Arnold
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "plugin.h"
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#ifdef HAVE_LCD_BITMAP
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#include "gray.h"
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/* Set position of the top left corner of the greyscale overlay
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Note that by is in pixel-block units (8 pixels) */
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void gray_set_position(int x, int by)
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{
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_gray_info.x = x;
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_gray_info.by = by;
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if (_gray_info.flags & _GRAY_RUNNING)
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{
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#ifdef SIMULATOR
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gray_deferred_lcd_update();
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gray_update();
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#else
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_gray_info.flags |= _GRAY_DEFERRED_UPDATE;
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#endif
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}
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}
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/* Set the draw mode for subsequent drawing operations */
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void gray_set_drawmode(int mode)
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{
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_gray_info.drawmode = mode & (DRMODE_SOLID|DRMODE_INVERSEVID);
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}
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/* Return the current draw mode */
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int gray_get_drawmode(void)
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{
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return _gray_info.drawmode;
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}
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/* Set the foreground shade for subsequent drawing operations */
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void gray_set_foreground(unsigned brightness)
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{
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unsigned data = MULU16(_gray_info.depth, brightness & 0xFF) + 127;
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_gray_info.fg_brightness = (data + (data >> 8)) >> 8; /* approx. data / 255 */
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}
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/* Return the current foreground shade */
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unsigned gray_get_foreground(void)
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{
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return (_gray_info.fg_brightness * 255 + (_gray_info.depth >> 1))
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/ _gray_info.depth;
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}
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/* Set the background shade for subsequent drawing operations */
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void gray_set_background(unsigned brightness)
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{
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unsigned data = MULU16(_gray_info.depth, brightness & 0xFF) + 127;
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_gray_info.bg_brightness = (data + (data >> 8)) >> 8; /* approx. data / 255 */
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}
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/* Return the current background shade */
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unsigned gray_get_background(void)
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{
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return (_gray_info.bg_brightness * 255 + (_gray_info.depth >> 1))
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/ _gray_info.depth;
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}
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/* Set draw mode, foreground and background shades at once */
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void gray_set_drawinfo(int mode, unsigned fg_brightness, unsigned bg_brightness)
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{
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gray_set_drawmode(mode);
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gray_set_foreground(fg_brightness);
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gray_set_background(bg_brightness);
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}
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/* Set font for the text output routines */
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void gray_setfont(int newfont)
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{
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_gray_info.curfont = newfont;
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}
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/* Get width and height of a text when printed with the current font */
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int gray_getstringsize(const unsigned char *str, int *w, int *h)
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{
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return _gray_rb->font_getstringsize(str, w, h, _gray_info.curfont);
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}
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#endif /* HAVE_LCD_BITMAP */
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