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rockbox/firmware/drivers/lcd-2bit-vert.c
Andrew Mahone e04f95eab9 LCD bitmap driver code consolidation from FS#4817: 
Move text-drawing code into firmware-drivers/lcd-bitmap-common.c, included by the various driver files.
Add new static function LCDFN(putsxyofs_style) to draw styled text, and use it in both LCDFN(puts_style_offset) and LCDFN(scroll_fn).
Merge lcd_gradient_rect functions, with new function containing simplified code for drawing one line of a multi-line gradient.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@22289 a1c6a512-1295-4272-9138-f99709370657
2009-08-13 08:02:29 +00:00

1005 lines
25 KiB
C
Raw Blame History

/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2004 by Linus Nielsen Feltzing
*
* 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 "system.h"
#include "cpu.h"
#include "kernel.h"
#include "lcd.h"
#include "thread.h"
#include <string.h>
#include <stdlib.h>
#include "file.h"
#include "debug.h"
#include "font.h"
#include "rbunicode.h"
#include "bidi.h"
#include "scroll_engine.h"
/*** globals ***/
fb_data lcd_framebuffer[LCD_FBHEIGHT][LCD_FBWIDTH] IBSS_ATTR;
const unsigned char lcd_dibits[16] ICONST_ATTR = {
0x00, 0x03, 0x0C, 0x0F, 0x30, 0x33, 0x3C, 0x3F,
0xC0, 0xC3, 0xCC, 0xCF, 0xF0, 0xF3, 0xFC, 0xFF
};
static const unsigned char pixmask[4] ICONST_ATTR = {
0x03, 0x0C, 0x30, 0xC0
};
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
};
static struct viewport* current_vp IBSS_ATTR;
static unsigned fg_pattern IBSS_ATTR;
static unsigned bg_pattern IBSS_ATTR;
/* LCD init */
void lcd_init(void)
{
/* Initialise the viewport */
lcd_set_viewport(NULL);
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;
fg_pattern = 0x55 * (~current_vp->fg_pattern & 3);
bg_pattern = 0x55 * (~current_vp->bg_pattern & 3);
}
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 brightness)
{
current_vp->fg_pattern = brightness;
fg_pattern = 0x55 * (~brightness & 3);
}
unsigned lcd_get_foreground(void)
{
return current_vp->fg_pattern;
}
void lcd_set_background(unsigned brightness)
{
current_vp->bg_pattern = brightness;
bg_pattern = 0x55 * (~brightness & 3);
}
unsigned lcd_get_background(void)
{
return current_vp->bg_pattern;
}
void lcd_set_drawinfo(int mode, unsigned fg_brightness, unsigned bg_brightness)
{
lcd_set_drawmode(mode);
lcd_set_foreground(fg_brightness);
lcd_set_background(bg_brightness);
}
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 ***/
static void setpixel(int x, int y)
{
unsigned mask = pixmask[y & 3];
fb_data *address = &lcd_framebuffer[y>>2][x];
unsigned data = *address;
*address = data ^ ((data ^ fg_pattern) & mask);
}
static void clearpixel(int x, int y)
{
unsigned mask = pixmask[y & 3];
fb_data *address = &lcd_framebuffer[y>>2][x];
unsigned data = *address;
*address = data ^ ((data ^ bg_pattern) & mask);
}
static void clearimgpixel(int x, int y)
{
unsigned mask = pixmask[y & 3];
fb_data *address = &lcd_framebuffer[y>>2][x];
unsigned data = *address;
*address = data ^ ((data ^ *(address + lcd_backdrop_offset)) & mask);
}
static void flippixel(int x, int y)
{
unsigned mask = pixmask[y & 3];
fb_data *address = &lcd_framebuffer[y>>2][x];
*address ^= mask;
}
static void nopixel(int x, int y)
{
(void)x;
(void)y;
}
lcd_pixelfunc_type* const lcd_pixelfuncs_bgcolor[8] = {
flippixel, nopixel, setpixel, setpixel,
nopixel, clearpixel, nopixel, clearpixel
};
lcd_pixelfunc_type* const lcd_pixelfuncs_backdrop[8] = {
flippixel, nopixel, setpixel, setpixel,
nopixel, clearimgpixel, nopixel, clearimgpixel
};
lcd_pixelfunc_type* const * lcd_pixelfuncs = lcd_pixelfuncs_bgcolor;
/* 'mask' and 'bits' contain 2 bits per pixel */
static void ICODE_ATTR flipblock(fb_data *address, unsigned mask,
unsigned bits)
{
*address ^= bits & mask;
}
static void ICODE_ATTR bgblock(fb_data *address, unsigned mask,
unsigned bits)
{
unsigned data = *address;
*address = data ^ ((data ^ bg_pattern) & mask & ~bits);
}
static void ICODE_ATTR bgimgblock(fb_data *address, unsigned mask,
unsigned bits)
{
unsigned data = *address;
*address = data ^ ((data ^ *(address + lcd_backdrop_offset)) & mask & ~bits);
}
static void ICODE_ATTR fgblock(fb_data *address, unsigned mask,
unsigned bits)
{
unsigned data = *address;
*address = data ^ ((data ^ fg_pattern) & mask & bits);
}
static void ICODE_ATTR solidblock(fb_data *address, unsigned mask,
unsigned bits)
{
unsigned data = *address;
unsigned bgp = bg_pattern;
bits = bgp ^ ((bgp ^ fg_pattern) & bits);
*address = data ^ ((data ^ bits) & mask);
}
static void ICODE_ATTR solidimgblock(fb_data *address, unsigned mask,
unsigned bits)
{
unsigned data = *address;
unsigned bgp = *(address + lcd_backdrop_offset);
bits = bgp ^ ((bgp ^ fg_pattern) & bits);
*address = data ^ ((data ^ bits) & mask);
}
static void ICODE_ATTR flipinvblock(fb_data *address, unsigned mask,
unsigned bits)
{
*address ^= ~bits & mask;
}
static void ICODE_ATTR bginvblock(fb_data *address, unsigned mask,
unsigned bits)
{
unsigned data = *address;
*address = data ^ ((data ^ bg_pattern) & mask & bits);
}
static void ICODE_ATTR bgimginvblock(fb_data *address, unsigned mask,
unsigned bits)
{
unsigned data = *address;
*address = data ^ ((data ^ *(address + lcd_backdrop_offset)) & mask & bits);
}
static void ICODE_ATTR fginvblock(fb_data *address, unsigned mask,
unsigned bits)
{
unsigned data = *address;
*address = data ^ ((data ^ fg_pattern) & mask & ~bits);
}
static void ICODE_ATTR solidinvblock(fb_data *address, unsigned mask,
unsigned bits)
{
unsigned data = *address;
unsigned fgp = fg_pattern;
bits = fgp ^ ((fgp ^ bg_pattern) & bits);
*address = data ^ ((data ^ bits) & mask);
}
static void ICODE_ATTR solidimginvblock(fb_data *address, unsigned mask,
unsigned bits)
{
unsigned data = *address;
unsigned fgp = fg_pattern;
bits = fgp ^ ((fgp ^ *(address + lcd_backdrop_offset)) & bits);
*address = data ^ ((data ^ bits) & mask);
}
lcd_blockfunc_type* const lcd_blockfuncs_bgcolor[8] = {
flipblock, bgblock, fgblock, solidblock,
flipinvblock, bginvblock, fginvblock, solidinvblock
};
lcd_blockfunc_type* const lcd_blockfuncs_backdrop[8] = {
flipblock, bgimgblock, fgblock, solidimgblock,
flipinvblock, bgimginvblock, fginvblock, solidimginvblock
};
lcd_blockfunc_type* const * lcd_blockfuncs = lcd_blockfuncs_bgcolor;
void lcd_set_backdrop(fb_data* backdrop)
{
lcd_backdrop = backdrop;
if (backdrop)
{
lcd_backdrop_offset = (long)backdrop - (long)lcd_framebuffer;
lcd_pixelfuncs = lcd_pixelfuncs_backdrop;
lcd_blockfuncs = lcd_blockfuncs_backdrop;
}
else
{
lcd_backdrop_offset = 0;
lcd_pixelfuncs = lcd_pixelfuncs_bgcolor;
lcd_blockfuncs = lcd_blockfuncs_bgcolor;
}
}
fb_data* lcd_get_backdrop(void)
{
return lcd_backdrop;
}
static inline void setblock(fb_data *address, unsigned mask, unsigned bits)
{
unsigned data = *address;
bits ^= data;
*address = data ^ (bits & mask);
}
/*** drawing functions ***/
/* Clear the whole display */
void lcd_clear_display(void)
{
if (current_vp->drawmode & DRMODE_INVERSEVID)
{
memset(lcd_framebuffer, fg_pattern, sizeof lcd_framebuffer);
}
else
{
if (lcd_backdrop)
memcpy(lcd_framebuffer, lcd_backdrop, sizeof lcd_framebuffer);
else
memset(lcd_framebuffer, bg_pattern, sizeof lcd_framebuffer);
}
lcd_scroll_info.lines = 0;
}
/* Clear the current viewport */
void lcd_clear_viewport(void)
{
int lastmode;
if (current_vp == &default_vp)
{
lcd_clear_display();
}
else
{
lastmode = current_vp->drawmode;
/* Invert the INVERSEVID bit and set basic mode to SOLID */
current_vp->drawmode = (~lastmode & DRMODE_INVERSEVID) |
DRMODE_SOLID;
lcd_fillrect(0, 0, current_vp->width, current_vp->height);
current_vp->drawmode = lastmode;
lcd_scroll_stop(current_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))
lcd_pixelfuncs[current_vp->drawmode](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_pixelfunc_type *pfunc = lcd_pixelfuncs[current_vp->drawmode];
deltax = abs(x2 - x1);
if (deltax == 0)
{
DEBUGF("lcd_drawline() called for vertical line - optimisation.\n");
lcd_vline(x1, y1, y2);
return;
}
deltay = abs(y2 - y1);
if (deltay == 0)
{
DEBUGF("lcd_drawline() called for horizontal line - optimisation.\n");
lcd_hline(x1, x2, y1);
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))
pfunc(current_vp->x + x, current_vp->y + 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;
int width;
fb_data *dst, *dst_end;
unsigned mask;
lcd_blockfunc_type *bfunc;
/* direction flip */
if (x2 < x1)
{
x = x1;
x1 = x2;
x2 = x;
}
/* nothing to draw? */
if (((unsigned)y >= (unsigned)current_vp->height) || (x1 >= current_vp->width)
|| (x2 < 0))
return;
/* clipping */
if (x1 < 0)
x1 = 0;
if (x2 >= current_vp->width)
x2 = current_vp->width-1;
width = x2 - x1 + 1;
/* adjust x1 and y to viewport */
x1 += current_vp->x;
y += current_vp->y;
bfunc = lcd_blockfuncs[current_vp->drawmode];
dst = &lcd_framebuffer[y>>2][x1];
mask = pixmask[y & 3];
dst_end = dst + width;
do
bfunc(dst++, mask, 0xFFu);
while (dst < dst_end);
}
/* Draw a vertical line (optimised) */
void lcd_vline(int x, int y1, int y2)
{
int ny;
fb_data *dst;
unsigned mask, mask_bottom;
lcd_blockfunc_type *bfunc;
/* direction flip */
if (y2 < y1)
{
ny = y1;
y1 = y2;
y2 = ny;
}
/* nothing to draw? */
if (((unsigned)x >= (unsigned)current_vp->width) || (y1 >= current_vp->height)
|| (y2 < 0))
return;
/* clipping */
if (y1 < 0)
y1 = 0;
if (y2 >= current_vp->height)
y2 = current_vp->height-1;
/* adjust for viewport */
y1 += current_vp->y;
y2 += current_vp->y;
x += current_vp->x;
bfunc = lcd_blockfuncs[current_vp->drawmode];
dst = &lcd_framebuffer[y1>>2][x];
ny = y2 - (y1 & ~3);
mask = 0xFFu << (2 * (y1 & 3));
mask_bottom = 0xFFu >> (2 * (~ny & 3));
for (; ny >= 4; ny -= 4)
{
bfunc(dst, mask, 0xFFu);
dst += LCD_WIDTH;
mask = 0xFFu;
}
mask &= mask_bottom;
bfunc(dst, mask, 0xFFu);
}
/* 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)
{
int ny;
fb_data *dst, *dst_end;
unsigned mask, mask_bottom;
unsigned bits = 0;
lcd_blockfunc_type *bfunc;
bool fillopt = false;
/* nothing to draw? */
if ((width <= 0) || (height <= 0) || (x >= current_vp->width)
|| (y >= current_vp->height) || (x + width <= 0) || (y + height <= 0))
return;
/* clipping */
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 (current_vp->drawmode & DRMODE_INVERSEVID)
{
if ((current_vp->drawmode & DRMODE_BG) && !lcd_backdrop)
{
fillopt = true;
bits = bg_pattern;
}
}
else
{
if (current_vp->drawmode & DRMODE_FG)
{
fillopt = true;
bits = fg_pattern;
}
}
bfunc = lcd_blockfuncs[current_vp->drawmode];
dst = &lcd_framebuffer[y>>2][x];
ny = height - 1 + (y & 3);
mask = 0xFFu << (2 * (y & 3));
mask_bottom = 0xFFu >> (2 * (~ny & 3));
for (; ny >= 4; ny -= 4)
{
if (fillopt && (mask == 0xFFu))
memset(dst, bits, width);
else
{
fb_data *dst_row = dst;
dst_end = dst_row + width;
do
bfunc(dst_row++, mask, 0xFFu);
while (dst_row < dst_end);
}
dst += LCD_WIDTH;
mask = 0xFFu;
}
mask &= mask_bottom;
if (fillopt && (mask == 0xFFu))
memset(dst, bits, width);
else
{
dst_end = dst + width;
do
bfunc(dst++, mask, 0xFFu);
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 similar to the internal lcd hw format. */
/* 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)
{
int shift, ny;
fb_data *dst, *dst_end;
unsigned mask, mask_bottom;
lcd_blockfunc_type *bfunc;
/* nothing to draw? */
if ((width <= 0) || (height <= 0) || (x >= current_vp->width) ||
(y >= current_vp->height) || (x + width <= 0) || (y + height <= 0))
return;
/* clipping */
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;
src += stride * (src_y >> 3) + src_x; /* move starting point */
src_y &= 7;
y -= src_y;
dst = &lcd_framebuffer[y>>2][x];
shift = y & 3;
ny = height - 1 + shift + src_y;
mask = 0xFFFFu << (2 * (shift + src_y));
/* Overflowing bits aren't important. */
mask_bottom = 0xFFFFu >> (2 * (~ny & 7));
bfunc = lcd_blockfuncs[current_vp->drawmode];
if (shift == 0)
{
unsigned dmask1, dmask2, data;
dmask1 = mask & 0xFFu;
dmask2 = mask >> 8;
for (; ny >= 8; ny -= 8)
{
const unsigned char *src_row = src;
fb_data *dst_row = dst + LCD_WIDTH;
dst_end = dst_row + width;
if (dmask1 != 0)
{
do
{
data = *src_row++;
bfunc(dst_row - LCD_WIDTH, dmask1, lcd_dibits[data&0x0F]);
bfunc(dst_row++, dmask2, lcd_dibits[(data>>4)&0x0F]);
}
while (dst_row < dst_end);
}
else
{
do
bfunc(dst_row++, dmask2, lcd_dibits[((*src_row++)>>4)&0x0F]);
while (dst_row < dst_end);
}
src += stride;
dst += 2*LCD_WIDTH;
dmask1 = dmask2 = 0xFFu;
}
dmask1 &= mask_bottom;
/* & 0xFFu is unnecessary here - dmask1 can't exceed that*/
dmask2 &= (mask_bottom >> 8);
dst_end = dst + width;
if (dmask1 != 0)
{
if (dmask2 != 0)
{
do
{
data = *src++;
bfunc(dst, dmask1, lcd_dibits[data&0x0F]);
bfunc((dst++) + LCD_WIDTH, dmask2, lcd_dibits[(data>>4)&0x0F]);
}
while (dst < dst_end);
}
else
{
do
bfunc(dst++, dmask1, lcd_dibits[(*src++)&0x0F]);
while (dst < dst_end);
}
}
else
{
do
bfunc((dst++) + LCD_WIDTH, dmask2, lcd_dibits[((*src++)>>4)&0x0F]);
while (dst < dst_end);
}
}
else
{
dst_end = dst + width;
do
{
const unsigned char *src_col = src++;
fb_data *dst_col = dst++;
unsigned mask_col = mask;
unsigned data = 0;
for (y = ny; y >= 8; y -= 8)
{
data |= *src_col << shift;
if (mask_col & 0xFFFFu)
{
if (mask_col & 0xFFu)
bfunc(dst_col, mask_col, lcd_dibits[data&0x0F]);
bfunc(dst_col + LCD_WIDTH, mask_col >> 8,
lcd_dibits[(data>>4)&0x0F]);
mask_col = 0xFFFFu;
}
else
mask_col >>= 16;
src_col += stride;
dst_col += 2*LCD_WIDTH;
data >>= 8;
}
data |= *src_col << shift;
mask_col &= mask_bottom ;
if (mask_col & 0xFFu)
bfunc(dst_col, mask_col, lcd_dibits[data&0x0F]);
if (mask_col & 0xFF00u)
bfunc(dst_col + LCD_WIDTH, mask_col >> 8,
lcd_dibits[(data>>4)&0x0F]);
}
while (dst < dst_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);
}
/* About Rockbox' internal native bitmap format:
*
* A bitmap contains two bits for every pixel. 00 = white, 01 = light grey,
* 10 = dark grey, 11 = black. 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..3, the second row defines pixel row 4..7 etc.
*
* This is the same as the internal lcd hw format. */
/* 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)
{
int shift, ny;
fb_data *dst, *dst_end;
unsigned mask, mask_bottom;
/* nothing to draw? */
if ((width <= 0) || (height <= 0) || (x >= current_vp->width)
|| (y >= current_vp->height) || (x + width <= 0) || (y + height <= 0))
return;
/* clipping */
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;
src += stride * (src_y >> 2) + src_x; /* move starting point */
src_y &= 3;
y -= src_y;
dst = &lcd_framebuffer[y>>2][x];
shift = y & 3;
ny = height - 1 + shift + src_y;
mask = 0xFFu << (2 * (shift + src_y));
mask_bottom = 0xFFu >> (2 * (~ny & 3));
if (shift == 0)
{
for (; ny >= 4; ny -= 4)
{
if (mask == 0xFFu)
memcpy(dst, src, width);
else
{
const fb_data *src_row = src;
fb_data *dst_row = dst;
dst_end = dst_row + width;
do
setblock(dst_row++, mask, *src_row++);
while (dst_row < dst_end);
}
src += stride;
dst += LCD_WIDTH;
mask = 0xFFu;
}
mask &= mask_bottom;
if (mask == 0xFFu)
memcpy(dst, src, width);
else
{
dst_end = dst + width;
do
setblock(dst++, mask, *src++);
while (dst < dst_end);
}
}
else
{
shift *= 2;
dst_end = dst + width;
do
{
const fb_data *src_col = src++;
fb_data *dst_col = dst++;
unsigned mask_col = mask;
unsigned data = 0;
for (y = ny; y >= 4; y -= 4)
{
data |= *src_col << shift;
if (mask_col & 0xFFu)
{
setblock(dst_col, mask_col, data);
mask_col = 0xFFu;
}
else
mask_col >>= 8;
src_col += stride;
dst_col += LCD_WIDTH;
data >>= 8;
}
data |= *src_col << shift;
setblock(dst_col, mask_col & mask_bottom, data);
}
while (dst < dst_end);
}
}
/* 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);
}
#include "lcd-bitmap-common.c"
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