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rockbox/firmware/drivers/lcd-16bit.c

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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2005 by Dave Chapman
*
* Rockbox driver for 16-bit colour LCDs
*
* 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 "config.h"
#include "cpu.h"
#include "lcd.h"
#include "kernel.h"
#include "thread.h"
#include <stdlib.h>
#include "string-extra.h" /* mem*() */
#include "file.h"
#include "debug.h"
#include "system.h"
#include "font.h"
#include "rbunicode.h"
#include "bidi.h"
#include "scroll_engine.h"
enum fill_opt {
OPT_NONE = 0,
OPT_SET,
OPT_COPY
};
/*** globals ***/
fb_data lcd_framebuffer[LCD_FBHEIGHT][LCD_FBWIDTH]
IRAM_LCDFRAMEBUFFER CACHEALIGN_AT_LEAST_ATTR(16);
static fb_data* lcd_backdrop = NULL;
static long lcd_backdrop_offset IDATA_ATTR = 0;
static struct viewport default_vp =
{
.x = 0,
.y = 0,
.width = LCD_WIDTH,
.height = LCD_HEIGHT,
.font = FONT_SYSFIXED,
.drawmode = DRMODE_SOLID,
.fg_pattern = LCD_DEFAULT_FG,
.bg_pattern = LCD_DEFAULT_BG,
.lss_pattern = LCD_DEFAULT_BG,
.lse_pattern = LCD_DEFAULT_BG,
.lst_pattern = LCD_DEFAULT_BG,
};
static struct viewport* current_vp IDATA_ATTR = &default_vp;
/* LCD init */
void lcd_init(void)
{
lcd_clear_display();
/* Call device specific init */
lcd_init_device();
scroll_init();
}
/*** Viewports ***/
void lcd_set_viewport(struct viewport* vp)
{
if (vp == NULL)
current_vp = &default_vp;
else
current_vp = vp;
#if defined(SIMULATOR)
/* Force the viewport to be within bounds. If this happens it should
* be considered an error - the viewport will not draw as it might be
* expected.
*/
if((unsigned) current_vp->x > (unsigned) LCD_WIDTH
|| (unsigned) current_vp->y > (unsigned) LCD_HEIGHT
|| current_vp->x + current_vp->width > LCD_WIDTH
|| current_vp->y + current_vp->height > LCD_HEIGHT)
{
#if !defined(HAVE_VIEWPORT_CLIP)
DEBUGF("ERROR: "
#else
DEBUGF("NOTE: "
#endif
"set_viewport out of bounds: x: %d y: %d width: %d height:%d\n",
current_vp->x, current_vp->y,
current_vp->width, current_vp->height);
}
#endif
}
void lcd_update_viewport(void)
{
lcd_update_rect(current_vp->x, current_vp->y,
current_vp->width, current_vp->height);
}
void lcd_update_viewport_rect(int x, int y, int width, int height)
{
lcd_update_rect(current_vp->x + x, current_vp->y + y, width, height);
}
/*** parameter handling ***/
void lcd_set_drawmode(int mode)
{
current_vp->drawmode = mode & (DRMODE_SOLID|DRMODE_INVERSEVID);
}
int lcd_get_drawmode(void)
{
return current_vp->drawmode;
}
void lcd_set_foreground(unsigned color)
{
current_vp->fg_pattern = color;
}
unsigned lcd_get_foreground(void)
{
return current_vp->fg_pattern;
}
void lcd_set_background(unsigned color)
{
current_vp->bg_pattern = color;
}
unsigned lcd_get_background(void)
{
return current_vp->bg_pattern;
}
void lcd_set_selector_start(unsigned color)
{
current_vp->lss_pattern = color;
}
void lcd_set_selector_end(unsigned color)
{
current_vp->lse_pattern = color;
}
void lcd_set_selector_text(unsigned color)
{
current_vp->lst_pattern = color;
}
void lcd_set_drawinfo(int mode, unsigned fg_color, unsigned bg_color)
{
lcd_set_drawmode(mode);
current_vp->fg_pattern = fg_color;
current_vp->bg_pattern = bg_color;
}
int lcd_getwidth(void)
{
return current_vp->width;
}
int lcd_getheight(void)
{
return current_vp->height;
}
void lcd_setfont(int newfont)
{
current_vp->font = newfont;
}
int lcd_getfont(void)
{
return current_vp->font;
}
int lcd_getstringsize(const unsigned char *str, int *w, int *h)
{
return font_getstringsize(str, w, h, current_vp->font);
}
/*** low-level drawing functions ***/
#define LCDADDR(x, y) (&lcd_framebuffer[(y)][(x)])
static void ICODE_ATTR setpixel(fb_data *address)
{
*address = current_vp->fg_pattern;
}
static void ICODE_ATTR clearpixel(fb_data *address)
{
*address = current_vp->bg_pattern;
}
static void ICODE_ATTR clearimgpixel(fb_data *address)
{
*address = *(fb_data *)((long)address + lcd_backdrop_offset);
}
static void ICODE_ATTR flippixel(fb_data *address)
{
*address = ~(*address);
}
static void ICODE_ATTR nopixel(fb_data *address)
{
(void)address;
}
lcd_fastpixelfunc_type* const lcd_fastpixelfuncs_bgcolor[8] = {
flippixel, nopixel, setpixel, setpixel,
nopixel, clearpixel, nopixel, clearpixel
};
lcd_fastpixelfunc_type* const lcd_fastpixelfuncs_backdrop[8] = {
flippixel, nopixel, setpixel, setpixel,
nopixel, clearimgpixel, nopixel, clearimgpixel
};
lcd_fastpixelfunc_type* const * lcd_fastpixelfuncs = lcd_fastpixelfuncs_bgcolor;
void lcd_set_backdrop(fb_data* backdrop)
{
lcd_backdrop = backdrop;
if (backdrop)
{
lcd_backdrop_offset = (long)backdrop - (long)&lcd_framebuffer[0][0];
lcd_fastpixelfuncs = lcd_fastpixelfuncs_backdrop;
}
else
{
lcd_backdrop_offset = 0;
lcd_fastpixelfuncs = lcd_fastpixelfuncs_bgcolor;
}
}
fb_data* lcd_get_backdrop(void)
{
return lcd_backdrop;
}
/*** drawing functions ***/
/* Clear the current viewport */
void lcd_clear_viewport(void)
{
fb_data *dst, *dst_end;
dst = LCDADDR(current_vp->x, current_vp->y);
dst_end = dst + current_vp->height * LCD_WIDTH;
if (current_vp->drawmode & DRMODE_INVERSEVID)
{
do
{
memset16(dst, current_vp->fg_pattern, current_vp->width);
dst += LCD_WIDTH;
}
while (dst < dst_end);
}
else
{
if (!lcd_backdrop)
{
do
{
memset16(dst, current_vp->bg_pattern, current_vp->width);
dst += LCD_WIDTH;
}
while (dst < dst_end);
}
else
{
do
{
memcpy(dst, (void *)((long)dst + lcd_backdrop_offset),
current_vp->width * sizeof(fb_data));
dst += LCD_WIDTH;
}
while (dst < dst_end);
}
}
if (current_vp == &default_vp)
{
lcd_scroll_info.lines = 0;
}
else
{
lcd_scroll_stop(current_vp);
}
}
/* Clear the whole display */
void lcd_clear_display(void)
{
struct viewport* old_vp = current_vp;
current_vp = &default_vp;
lcd_clear_viewport();
current_vp = old_vp;
}
/* Set a single pixel */
void lcd_drawpixel(int x, int y)
{
if ( ((unsigned)x < (unsigned)current_vp->width)
&& ((unsigned)y < (unsigned)current_vp->height)
#if defined(HAVE_VIEWPORT_CLIP)
&& ((unsigned)x < (unsigned)LCD_WIDTH)
&& ((unsigned)y < (unsigned)LCD_HEIGHT)
#endif
)
lcd_fastpixelfuncs[current_vp->drawmode](LCDADDR(current_vp->x+x, current_vp->y+y));
}
/* Draw a line */
void lcd_drawline(int x1, int y1, int x2, int y2)
{
int numpixels;
int i;
int deltax, deltay;
int d, dinc1, dinc2;
int x, xinc1, xinc2;
int y, yinc1, yinc2;
lcd_fastpixelfunc_type *pfunc = lcd_fastpixelfuncs[current_vp->drawmode];
deltay = abs(y2 - y1);
if (deltay == 0)
{
/* DEBUGF("lcd_drawline() called for horizontal line - optimisation.\n"); */
lcd_hline(x1, x2, y1);
return;
}
deltax = abs(x2 - x1);
if (deltax == 0)
{
/* DEBUGF("lcd_drawline() called for vertical line - optimisation.\n"); */
lcd_vline(x1, y1, y2);
return;
}
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++)
{
if ( ((unsigned)x < (unsigned)current_vp->width)
&& ((unsigned)y < (unsigned)current_vp->height)
#if defined(HAVE_VIEWPORT_CLIP)
&& ((unsigned)x < (unsigned)LCD_WIDTH)
&& ((unsigned)y < (unsigned)LCD_HEIGHT)
#endif
)
pfunc(LCDADDR(x + current_vp->x, y + current_vp->y));
if (d < 0)
{
d += dinc1;
x += xinc1;
y += yinc1;
}
else
{
d += dinc2;
x += xinc2;
y += yinc2;
}
}
}
/* Draw a horizontal line (optimised) */
void lcd_hline(int x1, int x2, int y)
{
int x, width;
unsigned bits = 0;
enum fill_opt fillopt = OPT_NONE;
fb_data *dst, *dst_end;
/* direction flip */
if (x2 < x1)
{
x = x1;
x1 = x2;
x2 = x;
}
/******************** In viewport clipping **********************/
/* nothing to draw? */
if (((unsigned)y >= (unsigned)current_vp->height) ||
(x1 >= current_vp->width) ||
(x2 < 0))
return;
if (x1 < 0)
x1 = 0;
if (x2 >= current_vp->width)
x2 = current_vp->width-1;
/* Adjust x1 and y to viewport */
x1 += current_vp->x;
x2 += current_vp->x;
y += current_vp->y;
#if defined(HAVE_VIEWPORT_CLIP)
/********************* Viewport on screen clipping ********************/
/* nothing to draw? */
if (((unsigned)y >= (unsigned) LCD_HEIGHT) || (x1 >= LCD_WIDTH)
|| (x2 < 0))
return;
/* clipping */
if (x1 < 0)
x1 = 0;
if (x2 >= LCD_WIDTH)
x2 = LCD_WIDTH-1;
#endif
width = x2 - x1 + 1;
/* drawmode and optimisation */
if (current_vp->drawmode & DRMODE_INVERSEVID)
{
if (current_vp->drawmode & DRMODE_BG)
{
if (!lcd_backdrop)
{
fillopt = OPT_SET;
bits = current_vp->bg_pattern;
}
else
fillopt = OPT_COPY;
}
}
else
{
if (current_vp->drawmode & DRMODE_FG)
{
fillopt = OPT_SET;
bits = current_vp->fg_pattern;
}
}
if (fillopt == OPT_NONE && current_vp->drawmode != DRMODE_COMPLEMENT)
return;
dst = LCDADDR(x1, y);
switch (fillopt)
{
case OPT_SET:
memset16(dst, bits, width);
break;
case OPT_COPY:
memcpy(dst, (void *)((long)dst + lcd_backdrop_offset),
width * sizeof(fb_data));
break;
case OPT_NONE: /* DRMODE_COMPLEMENT */
dst_end = dst + width;
do
*dst = ~(*dst);
while (++dst < dst_end);
break;
}
}
/* Draw a vertical line (optimised) */
void lcd_vline(int x, int y1, int y2)
{
int y;
fb_data *dst, *dst_end;
lcd_fastpixelfunc_type *pfunc = lcd_fastpixelfuncs[current_vp->drawmode];
/* direction flip */
if (y2 < y1)
{
y = y1;
y1 = y2;
y2 = y;
}
/******************** In viewport clipping **********************/
/* nothing to draw? */
if (((unsigned)x >= (unsigned)current_vp->width) ||
(y1 >= current_vp->height) ||
(y2 < 0))
return;
if (y1 < 0)
y1 = 0;
if (y2 >= current_vp->height)
y2 = current_vp->height-1;
/* adjust for viewport */
x += current_vp->x;
y1 += current_vp->y;
y2 += current_vp->y;
#if defined(HAVE_VIEWPORT_CLIP)
/********************* Viewport on screen clipping ********************/
/* nothing to draw? */
if (( (unsigned) x >= (unsigned)LCD_WIDTH) || (y1 >= LCD_HEIGHT)
|| (y2 < 0))
return;
/* clipping */
if (y1 < 0)
y1 = 0;
if (y2 >= LCD_HEIGHT)
y2 = LCD_HEIGHT-1;
#endif
dst = LCDADDR(x , y1);
dst_end = dst + (y2 - y1) * LCD_WIDTH;
do
{
pfunc(dst);
dst += LCD_WIDTH;
}
while (dst <= dst_end);
}
/* Draw a rectangular box */
void lcd_drawrect(int x, int y, int width, int height)
{
if ((width <= 0) || (height <= 0))
return;
int x2 = x + width - 1;
int y2 = y + height - 1;
lcd_vline(x, y, y2);
lcd_vline(x2, y, y2);
lcd_hline(x, x2, y);
lcd_hline(x, x2, y2);
}
/* Fill a rectangular area */
void lcd_fillrect(int x, int y, int width, int height)
{
unsigned bits = 0;
enum fill_opt fillopt = OPT_NONE;
fb_data *dst, *dst_end;
/******************** In viewport clipping **********************/
/* nothing to draw? */
if ((width <= 0) || (height <= 0) || (x >= current_vp->width) ||
(y >= current_vp->height) || (x + width <= 0) || (y + height <= 0))
return;
if (x < 0)
{
width += x;
x = 0;
}
if (y < 0)
{
height += y;
y = 0;
}
if (x + width > current_vp->width)
width = current_vp->width - x;
if (y + height > current_vp->height)
height = current_vp->height - y;
/* adjust for viewport */
x += current_vp->x;
y += current_vp->y;
#if defined(HAVE_VIEWPORT_CLIP)
/********************* Viewport on screen clipping ********************/
/* nothing to draw? */
if ((x >= LCD_WIDTH) || (y >= LCD_HEIGHT)
|| (x + width <= 0) || (y + height <= 0))
return;
/* clip image in viewport in screen */
if (x < 0)
{
width += x;
x = 0;
}
if (y < 0)
{
height += y;
y = 0;
}
if (x + width > LCD_WIDTH)
width = LCD_WIDTH - x;
if (y + height > LCD_HEIGHT)
height = LCD_HEIGHT - y;
#endif
/* drawmode and optimisation */
if (current_vp->drawmode & DRMODE_INVERSEVID)
{
if (current_vp->drawmode & DRMODE_BG)
{
if (!lcd_backdrop)
{
fillopt = OPT_SET;
bits = current_vp->bg_pattern;
}
else
fillopt = OPT_COPY;
}
}
else
{
if (current_vp->drawmode & DRMODE_FG)
{
fillopt = OPT_SET;
bits = current_vp->fg_pattern;
}
}
if (fillopt == OPT_NONE && current_vp->drawmode != DRMODE_COMPLEMENT)
return;
dst = LCDADDR(x, y);
dst_end = dst + height * LCD_WIDTH;
do
{
fb_data *dst_row, *row_end;
switch (fillopt)
{
case OPT_SET:
memset16(dst, bits, width);
break;
case OPT_COPY:
memcpy(dst, (void *)((long)dst + lcd_backdrop_offset),
width * sizeof(fb_data));
break;
case OPT_NONE: /* DRMODE_COMPLEMENT */
dst_row = dst;
row_end = dst_row + width;
do
*dst_row = ~(*dst_row);
while (++dst_row < row_end);
break;
}
dst += LCD_WIDTH;
}
while (dst < dst_end);
}
/* About Rockbox' internal monochrome bitmap format:
*
* A bitmap contains one bit for every pixel that defines if that pixel is
* black (1) or white (0). Bits within a byte are arranged vertically, LSB
* at top.
* The bytes are stored in row-major order, with byte 0 being top left,
* byte 1 2nd from left etc. The first row of bytes defines pixel rows
* 0..7, the second row defines pixel row 8..15 etc.
*
* This is the mono bitmap format used on all other targets so far; the
* pixel packing doesn't really matter on a 8bit+ target. */
/* Draw a partial monochrome bitmap */
void ICODE_ATTR lcd_mono_bitmap_part(const unsigned char *src, int src_x,
int src_y, int stride, int x, int y,
int width, int height)
{
const unsigned char *src_end;
fb_data *dst, *dst_end;
unsigned dmask = 0x100; /* bit 8 == sentinel */
int drmode = current_vp->drawmode;
/******************** Image in viewport clipping **********************/
/* nothing to draw? */
if ((width <= 0) || (height <= 0) || (x >= current_vp->width) ||
(y >= current_vp->height) || (x + width <= 0) || (y + height <= 0))
return;
if (x < 0)
{
width += x;
src_x -= x;
x = 0;
}
if (y < 0)
{
height += y;
src_y -= y;
y = 0;
}
if (x + width > current_vp->width)
width = current_vp->width - x;
if (y + height > current_vp->height)
height = current_vp->height - y;
/* adjust for viewport */
x += current_vp->x;
y += current_vp->y;
#if defined(HAVE_VIEWPORT_CLIP)
/********************* Viewport on screen clipping ********************/
/* nothing to draw? */
if ((x >= LCD_WIDTH) || (y >= LCD_HEIGHT)
|| (x + width <= 0) || (y + height <= 0))
return;
/* clip image in viewport in screen */
if (x < 0)
{
width += x;
src_x -= x;
x = 0;
}
if (y < 0)
{
height += y;
src_y -= y;
y = 0;
}
if (x + width > LCD_WIDTH)
width = LCD_WIDTH - x;
if (y + height > LCD_HEIGHT)
height = LCD_HEIGHT - y;
#endif
src += stride * (src_y >> 3) + src_x; /* move starting point */
src_y &= 7;
src_end = src + width;
dst = LCDADDR(x, y);
dst_end = dst + height * LCD_WIDTH;
if (drmode & DRMODE_INVERSEVID)
{
dmask = 0x1ff; /* bit 8 == sentinel */
drmode &= DRMODE_SOLID; /* mask out inversevid */
}
do
{
const unsigned char *src_col = src++;
unsigned data = (*src_col ^ dmask) >> src_y;
fb_data *dst_col = dst++;
int fg, bg;
long bo;
#define UPDATE_SRC do { \
data >>= 1; \
if (data == 0x001) { \
src_col += stride; \
data = *src_col ^ dmask; \
} \
} while (0)
switch (drmode)
{
case DRMODE_COMPLEMENT:
do
{
if (data & 0x01)
*dst_col = ~(*dst_col);
dst_col += LCD_WIDTH;
UPDATE_SRC;
}
while (dst_col < dst_end);
break;
case DRMODE_BG:
if (lcd_backdrop)
{
bo = lcd_backdrop_offset;
do
{
if (!(data & 0x01))
*dst_col = *(fb_data *)((long)dst_col + bo);
dst_col += LCD_WIDTH;
UPDATE_SRC;
}
while (dst_col < dst_end);
}
else
{
bg = current_vp->bg_pattern;
do
{
if (!(data & 0x01))
*dst_col = bg;
dst_col += LCD_WIDTH;
UPDATE_SRC;
}
while (dst_col < dst_end);
}
break;
case DRMODE_FG:
fg = current_vp->fg_pattern;
do
{
if (data & 0x01)
*dst_col = fg;
dst_col += LCD_WIDTH;
UPDATE_SRC;
}
while (dst_col < dst_end);
break;
case DRMODE_SOLID:
fg = current_vp->fg_pattern;
if (lcd_backdrop)
{
bo = lcd_backdrop_offset;
do
{
*dst_col = (data & 0x01) ? fg
: *(fb_data *)((long)dst_col + bo);
dst_col += LCD_WIDTH;
UPDATE_SRC;
}
while (dst_col < dst_end);
}
else
{
bg = current_vp->bg_pattern;
do
{
*dst_col = (data & 0x01) ? fg : bg;
dst_col += LCD_WIDTH;
UPDATE_SRC;
}
while (dst_col < dst_end);
}
break;
}
}
while (src < src_end);
}
/* Draw a full monochrome bitmap */
void lcd_mono_bitmap(const unsigned char *src, int x, int y, int width, int height)
{
lcd_mono_bitmap_part(src, 0, 0, width, x, y, width, height);
}
/* Draw a partial native bitmap */
void ICODE_ATTR lcd_bitmap_part(const fb_data *src, int src_x, int src_y,
int stride, int x, int y, int width,
int height)
{
fb_data *dst;
/******************** Image in viewport clipping **********************/
/* nothing to draw? */
if ((width <= 0) || (height <= 0) || (x >= current_vp->width) ||
(y >= current_vp->height) || (x + width <= 0) || (y + height <= 0))
return;
if (x < 0)
{
width += x;
src_x -= x;
x = 0;
}
if (y < 0)
{
height += y;
src_y -= y;
y = 0;
}
if (x + width > current_vp->width)
width = current_vp->width - x;
if (y + height > current_vp->height)
height = current_vp->height - y;
/* adjust for viewport */
x += current_vp->x;
y += current_vp->y;
#if defined(HAVE_VIEWPORT_CLIP)
/********************* Viewport on screen clipping ********************/
/* nothing to draw? */
if ((x >= LCD_WIDTH) || (y >= LCD_HEIGHT)
|| (x + width <= 0) || (y + height <= 0))
return;
/* clip image in viewport in screen */
if (x < 0)
{
width += x;
src_x -= x;
x = 0;
}
if (y < 0)
{
height += y;
src_y -= y;
y = 0;
}
if (x + width > LCD_WIDTH)
width = LCD_WIDTH - x;
if (y + height > LCD_HEIGHT)
height = LCD_HEIGHT - y;
#endif
src += stride * src_y + src_x; /* move starting point */
dst = LCDADDR(x, y);
do
{
memcpy(dst, src, width * sizeof(fb_data));
src += stride;
dst += LCD_WIDTH;
}
while (--height > 0);
}
/* Draw a full native bitmap */
void lcd_bitmap(const fb_data *src, int x, int y, int width, int height)
{
lcd_bitmap_part(src, 0, 0, width, x, y, width, height);
}
/* Draw a partial native bitmap with transparency and foreground colors */
void ICODE_ATTR lcd_bitmap_transparent_part(const fb_data *src, int src_x,
int src_y, int stride, int x,
int y, int width, int height)
{
fb_data *dst;
unsigned fg = current_vp->fg_pattern;
/******************** Image in viewport clipping **********************/
/* nothing to draw? */
if ((width <= 0) || (height <= 0) || (x >= current_vp->width) ||
(y >= current_vp->height) || (x + width <= 0) || (y + height <= 0))
return;
if (x < 0)
{
width += x;
src_x -= x;
x = 0;
}
if (y < 0)
{
height += y;
src_y -= y;
y = 0;
}
if (x + width > current_vp->width)
width = current_vp->width - x;
if (y + height > current_vp->height)
height = current_vp->height - y;
/* adjust for viewport */
x += current_vp->x;
y += current_vp->y;
#if defined(HAVE_VIEWPORT_CLIP)
/********************* Viewport on screen clipping ********************/
/* nothing to draw? */
if ((x >= LCD_WIDTH) || (y >= LCD_HEIGHT)
|| (x + width <= 0) || (y + height <= 0))
return;
/* clip image in viewport in screen */
if (x < 0)
{
width += x;
src_x -= x;
x = 0;
}
if (y < 0)
{
height += y;
src_y -= y;
y = 0;
}
if (x + width > LCD_WIDTH)
width = LCD_WIDTH - x;
if (y + height > LCD_HEIGHT)
height = LCD_HEIGHT - y;
#endif
src += stride * src_y + src_x; /* move starting point */
dst = LCDADDR(x, y);
#ifdef CPU_ARM
{
int w, px;
asm volatile (
".rowstart: \n"
"mov %[w], %[width] \n" /* Load width for inner loop */
".nextpixel: \n"
"ldrh %[px], [%[s]], #2 \n" /* Load src pixel */
"add %[d], %[d], #2 \n" /* Uncoditionally increment dst */
/* done here for better pipelining */
"cmp %[px], %[fgcolor] \n" /* Compare to foreground color */
"streqh %[fgpat], [%[d], #-2] \n" /* Store foregroud if match */
"cmpne %[px], %[transcolor] \n" /* Compare to transparent color */
"strneh %[px], [%[d], #-2] \n" /* Store dst if not transparent */
"subs %[w], %[w], #1 \n" /* Width counter has run down? */
"bgt .nextpixel \n" /* More in this row? */
"add %[s], %[s], %[sstp], lsl #1 \n" /* Skip over to start of next line */
"add %[d], %[d], %[dstp], lsl #1 \n"
"subs %[h], %[h], #1 \n" /* Height counter has run down? */
"bgt .rowstart \n" /* More rows? */
: [w]"=&r"(w), [h]"+&r"(height), [px]"=&r"(px),
[s]"+&r"(src), [d]"+&r"(dst)
: [width]"r"(width),
[sstp]"r"(stride - width),
[dstp]"r"(LCD_WIDTH - width),
[transcolor]"r"(TRANSPARENT_COLOR),
[fgcolor]"r"(REPLACEWITHFG_COLOR),
[fgpat]"r"(fg)
);
}
#else /* optimized C version */
do
{
const fb_data *src_row = src;
fb_data *dst_row = dst;
fb_data *row_end = dst_row + width;
do
{
unsigned data = *src_row++;
if (data != TRANSPARENT_COLOR)
{
if (data == REPLACEWITHFG_COLOR)
data = fg;
*dst_row = data;
}
}
while (++dst_row < row_end);
src += stride;
dst += LCD_WIDTH;
}
while (--height > 0);
#endif
}
/* Draw a full native bitmap with transparent and foreground colors */
void lcd_bitmap_transparent(const fb_data *src, int x, int y,
int width, int height)
{
lcd_bitmap_transparent_part(src, 0, 0, width, x, y, width, height);
}
#include "lcd-bitmap-common.c"
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