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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* New greyscale framework
* Parameter handling
*
* 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
*
* 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 "plugin.h"
#include "grey.h"
/* Default greylib viewport struct */
struct viewport _grey_default_vp;
/* Set position of the top left corner of the greyscale overlay
Note that depending on the target LCD, either x or y gets rounded
to the nearest multiple of 4 or 8 */
void grey_set_position(int x, int y)
{
#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
_grey_info.bx = (x + 4) >> 3;
x = 8 * _grey_info.bx;
#else /* vertical packing or vertical interleaved */
#if (LCD_DEPTH == 1) || (LCD_PIXELFORMAT == VERTICAL_INTERLEAVED)
_grey_info.by = (y + 4) >> 3;
y = 8 * _grey_info.by;
#elif LCD_DEPTH == 2
_grey_info.by = (y + 2) >> 2;
y = 4 * _grey_info.by;
#endif
#endif /* LCD_PIXELFORMAT */
_grey_info.x = x;
_grey_info.y = y;
if (_grey_info.flags & _GREY_RUNNING)
{
#ifdef SIMULATOR
rb->sim_lcd_ex_update_rect(_grey_info.x, _grey_info.y,
_grey_info.width,
_grey_info.height);
grey_deferred_lcd_update();
#else
_grey_info.flags |= _GREY_DEFERRED_UPDATE;
#endif
}
}
/* Set the draw mode for subsequent drawing operations */
void grey_set_drawmode(int mode)
{
_grey_info.vp->drawmode = mode & (DRMODE_SOLID|DRMODE_INVERSEVID);
}
/* Return the current draw mode */
int grey_get_drawmode(void)
{
return _grey_info.vp->drawmode;
}
/* Set the foreground shade for subsequent drawing operations */
void grey_set_foreground(unsigned brightness)
{
_grey_info.vp->fg_pattern = brightness;
}
/* Return the current foreground shade */
unsigned grey_get_foreground(void)
{
return _grey_info.vp->fg_pattern;
}
/* Set the background shade for subsequent drawing operations */
void grey_set_background(unsigned brightness)
{
_grey_info.vp->bg_pattern = brightness;
}
/* Return the current background shade */
unsigned grey_get_background(void)
{
return _grey_info.vp->bg_pattern;
}
/* Set draw mode, foreground and background shades at once */
void grey_set_drawinfo(int mode, unsigned fg_brightness, unsigned bg_brightness)
{
grey_set_drawmode(mode);
grey_set_foreground(fg_brightness);
grey_set_background(bg_brightness);
}
/* Set font for the text output routines */
void grey_setfont(int newfont)
{
_grey_info.vp->font = newfont;
}
/* Get width and height of a text when printed with the current font */
int grey_getstringsize(const unsigned char *str, int *w, int *h)
{
return rb->font_getstringsize(str, w, h, _grey_info.vp->font);
}
/* Helper to establish visible area between viewport and framebuffer */
static void grey_update_clip_rect(void)
{
if (!(_grey_info.flags & GREY_BUFFERED))
return; /* no chunky buffer */
struct viewport *vp = _grey_info.vp;
if (!vp || !_grey_info.curbuffer)
return;
/* Get overall intersection of framebuffer and viewport in viewport
coordinates so that later clipping of drawing is kept as simple as
possible. If l <= r and/or b <= t after intersecting, draw routines
will see this as an empty area. */
_grey_info.clip_l = _grey_info.cb_x - vp->x;
_grey_info.clip_t = _grey_info.cb_y - vp->y;
_grey_info.clip_r = _grey_info.clip_l + _grey_info.cb_width;
_grey_info.clip_b = _grey_info.clip_t + _grey_info.cb_height;
if (_grey_info.clip_l < 0)
_grey_info.clip_l = 0;
if (_grey_info.clip_t < 0)
_grey_info.clip_t = 0;
if (_grey_info.clip_r > vp->width)
_grey_info.clip_r = vp->width;
if (_grey_info.clip_b > vp->height)
_grey_info.clip_b = vp->height;
}
/* Set current grey viewport for draw routines */
void grey_set_viewport(struct viewport *vp)
{
if (vp == NULL)
vp = &_grey_default_vp;
if (_grey_info.vp != vp)
{
_grey_info.vp = vp;
grey_update_clip_rect();
}
}
/* Set viewport to default settings */
void grey_viewport_set_fullscreen(struct viewport *vp,
const enum screen_type screen)
{
if (vp == NULL)
vp = &_grey_default_vp;
vp->x = 0;
vp->y = 0;
vp->width = _grey_info.width;
vp->height = _grey_info.height;
vp->fg_pattern = 0;
vp->bg_pattern = 255;
vp->drawmode = DRMODE_SOLID;
vp->font = FONT_SYSFIXED;
if (vp == _grey_info.vp)
grey_update_clip_rect(); /* is current one in use */
(void)screen;
}
void grey_viewport_set_pos(struct viewport *vp,
int x, int y, int width, int height)
{
if (vp == NULL || vp == &_grey_default_vp)
return; /* Cannot be moved or resized */
if (width < 0)
width = 0; /* 'tis okay */
if (height < 0)
height = 0;
vp->x = x;
vp->y = y;
vp->width = width;
vp->height = height;
if (vp == _grey_info.vp)
grey_update_clip_rect(); /* is current one in use */
}
/* Set current grey chunky buffer for draw routines */
void grey_set_framebuffer(unsigned char *buffer)
{
if (!(_grey_info.flags & GREY_BUFFERED))
return; /* no chunky buffer */
if (buffer == NULL)
buffer = _grey_info.buffer; /* Default */
if (buffer != _grey_info.curbuffer)
{
_grey_info.curbuffer = buffer;
if (buffer == _grey_info.buffer)
{
/* Setting to default fb resets dimensions */
grey_framebuffer_set_pos(0, 0, 0, 0);
}
}
}
/* Specify the dimensions of the current framebuffer */
void grey_framebuffer_set_pos(int x, int y, int width, int height)
{
if (!(_grey_info.flags & GREY_BUFFERED))
return; /* no chunky buffer */
if (_grey_info.curbuffer == _grey_info.buffer)
{
/* This cannot be moved or resized */
x = 0;
y = 0;
width = _grey_info.width;
height = _grey_info.height;
}
else if (width <= 0 || height <= 0)
return;
if (x == _grey_info.cb_x && y == _grey_info.cb_y &&
width == _grey_info.cb_width && height == _grey_info.cb_height)
return; /* No change */
_grey_info.cb_x = x;
_grey_info.cb_y = y;
_grey_info.cb_width = width;
_grey_info.cb_height = height;
grey_update_clip_rect();
}
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