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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Bitmap graphics on player LCD!
*
* Copyright (C) 2005 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_CHARCELLS /* Player only :) */
#include "playergfx.h"
/* Global variables */
static struct plugin_api *pgfx_rb = NULL; /* global api struct pointer */
static int char_width;
static int char_height;
static unsigned pixel_height;
static unsigned pixel_width;
static unsigned char gfx_chars[8];
static unsigned char gfx_buffer[56];
/* Private function declarations */
static void linefunc(int x1, int y1, int x2, int y2,
void (*pixelfunc)(int x, int y));
/* Implementation */
bool pgfx_init(struct plugin_api* newrb, int cwidth, int cheight)
{
int i;
if (((unsigned) cwidth * (unsigned) cheight) > 8 || (unsigned) cheight > 2)
return false;
pgfx_rb = newrb;
char_width = cwidth;
char_height = cheight;
pixel_height = 7 * char_height;
pixel_width = 5 * char_width;
for (i = 0; i < cwidth * cheight; i++)
{
if ((gfx_chars[i] = pgfx_rb->lcd_get_locked_pattern()) == 0)
{
pgfx_release();
return false;
}
}
return true;
}
void pgfx_release(void)
{
int i;
for (i = 0; i < 8; i++)
if (gfx_chars[i])
pgfx_rb->lcd_unlock_pattern(gfx_chars[i]);
}
void pgfx_display(int cx, int cy)
{
int i, j;
int width = MIN(char_width, 11 - cx);
int height = MIN(char_height, 2 - cy);
for (i = 0; i < width; i++)
for (j = 0; j < height; j++)
pgfx_rb->lcd_putc(cx + i, cy + j, gfx_chars[char_height * i + j]);
}
void pgfx_update(void)
{
int i;
for (i = 0; i < char_width * char_height; i++)
pgfx_rb->lcd_define_pattern(gfx_chars[i], gfx_buffer + 7 * i);
}
void pgfx_clear_display(void)
{
pgfx_rb->memset(gfx_buffer, 0, char_width * pixel_height);
}
void pgfx_drawpixel(int x, int y)
{
gfx_buffer[pixel_height * (x/5) + y] |= 0x10 >> (x%5);
}
void pgfx_clearpixel(int x, int y)
{
gfx_buffer[pixel_height * (x/5) + y] &= ~(0x10 >> (x%5));
}
void pgfx_invertpixel(int x, int y)
{
gfx_buffer[pixel_height * (x/5) + y] ^= 0x10 >> (x%5);
}
static void linefunc(int x1, int y1, int x2, int y2,
void (*pixelfunc)(int x, int y))
{
int numpixels;
int i;
int deltax, deltay;
int d, dinc1, dinc2;
int x, xinc1, xinc2;
int y, yinc1, yinc2;
deltax = abs(x2 - x1);
deltay = abs(y2 - y1);
xinc2 = 1;
yinc2 = 1;
if (deltax >= deltay)
{
numpixels = deltax;
d = 2 * deltay - deltax;
dinc1 = deltay * 2;
dinc2 = (deltay - deltax) * 2;
xinc1 = 1;
yinc1 = 0;
}
else
{
numpixels = deltay;
d = 2 * deltax - deltay;
dinc1 = deltax * 2;
dinc2 = (deltax - deltay) * 2;
xinc1 = 0;
yinc1 = 1;
}
numpixels++; /* include endpoints */
if(x1 > x2)
{
xinc1 = -xinc1;
xinc2 = -xinc2;
}
if(y1 > y2)
{
yinc1 = -yinc1;
yinc2 = -yinc2;
}
x = x1;
y = y1;
for (i = 0; i < numpixels; i++)
{
pixelfunc(x, y);
if (d < 0)
{
d += dinc1;
x += xinc1;
y += yinc1;
}
else
{
d += dinc2;
x += xinc2;
y += yinc2;
}
}
}
void pgfx_drawline(int x1, int y1, int x2, int y2)
{
linefunc(x1, y1, x2, y2, pgfx_drawpixel);
}
void pgfx_clearline(int x1, int y1, int x2, int y2)
{
linefunc(x1, y1, x2, y2, pgfx_clearpixel);
}
void pgfx_invertline(int x1, int y1, int x2, int y2)
{
linefunc(x1, y1, x2, y2, pgfx_invertpixel);
}
void pgfx_invertrect (int x, int y, int nx, int ny)
{
int i, j;
if (((unsigned) x >= pixel_width) || ((unsigned) y >= pixel_height))
return;
if ((unsigned)(x + nx) > pixel_width)
nx = pixel_width - x;
if ((unsigned)(y + ny) > pixel_height)
ny = pixel_height - y;
for (i = 0; i < nx; i++)
for (j = 0; j < ny; j++)
pgfx_invertpixel(x + i, y + j);
}
void pgfx_bitmap (const unsigned char *src, int x, int y, int nx, int ny,
bool clear)
{
int stride, i, j;
unsigned data;
if (((unsigned) x >= pixel_width) || ((unsigned) y >= pixel_height))
return;
stride = nx; /* otherwise right-clipping will destroy the image */
if (((unsigned)(x + nx)) >= pixel_width)
nx = pixel_width - x;
if (((unsigned)(y + ny)) >= pixel_height)
ny = pixel_height - y;
for (i = 0; i < nx; i++, src++)
{
data = src[0];
if (ny > 8) /* ny is max. 14 */
data |= src[stride] << 8;
for (j = 0; j < ny; j++)
{
if (data & 1)
pgfx_drawpixel(x + i, y + j);
else
if (clear)
pgfx_clearpixel(x + i, y + j);
data >>= 1;
}
}
}
#endif /* HAVE_LCD_CHARCELLS */
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