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rockbox/firmware/drivers/lcd-2bit-horz.c
William Wilgus ffee661ab7 lcd framebuffer - Bugfix ensure proper alignment 
-- apparenty 0x4 aligned doesn't work properly

requires 0x8 alignment at least for the h10 20gb
but enabled for all arm processors

assign the default framebuffer to the default_vp as well

Change-Id: I0b76c30f2ddb5d6d2f7c6a132e4081aee58da17b
2021-03-24 18:22:01 +00:00

1085 lines
28 KiB
C
Raw Blame History

/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* LCD driver for horizontally-packed 2bpp greyscale display
*
* Based on code from the rockbox lcd's driver
*
* Copyright (c) 2006 Seven Le Mesle (sevlm@free.fr)
*
* 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 <string.h>
#include <stdlib.h>
#include "file.h"
#include "debug.h"
#include "system.h"
#include "font.h"
#include "rbunicode.h"
#include "bidi.h"
#include "scroll_engine.h"
/*** globals ***/
static unsigned char lcd_static_framebuffer[LCD_FBHEIGHT][LCD_FBWIDTH] IRAM_LCDFRAMEBUFFER;
static void *lcd_frameaddress_default(int x, int y);
static const unsigned char pixmask[4] ICONST_ATTR = {
0xC0, 0x30, 0x0C, 0x03
};
static fb_data* lcd_backdrop = NULL;
static long lcd_backdrop_offset IDATA_ATTR = 0;
/* shouldn't be changed unless you want system-wide framebuffer changes! */
struct frame_buffer_t lcd_framebuffer_default =
{
.fb_ptr = &lcd_static_framebuffer[0][0],
.get_address_fn = &lcd_frameaddress_default,
.stride = STRIDE_MAIN(LCD_WIDTH, LCD_HEIGHT),
.elems = (LCD_FBWIDTH*LCD_FBHEIGHT),
};
static struct viewport default_vp =
{
.x = 0,
.y = 0,
.width = LCD_WIDTH,
.height = LCD_HEIGHT,
.font = FONT_SYSFIXED,
.drawmode = DRMODE_SOLID,
.buffer = &lcd_framebuffer_default,
.fg_pattern = LCD_DEFAULT_FG,
.bg_pattern = LCD_DEFAULT_BG
};
struct viewport* lcd_current_viewport IBSS_ATTR MEM_ALIGN_ATTR = NULL;
static unsigned fg_pattern IBSS_ATTR;
static unsigned bg_pattern IBSS_ATTR;
static void *lcd_frameaddress_default(int x, int y)
{
/* the default expects a buffer the same size as the screen */
struct frame_buffer_t *fb = lcd_current_viewport->buffer;
#if defined(LCD_STRIDEFORMAT) && LCD_STRIDEFORMAT == VERTICAL_STRIDE
size_t element = (x * LCD_NATIVE_STRIDE(fb->stride)) + y;
#else
size_t element = (y * LCD_NATIVE_STRIDE(fb->stride)) + x;
#endif
return fb->fb_ptr + element;/*(element % fb->elems);*/
}
/* LCD init */
void lcd_init(void)
{
/* Initialize the viewport */
lcd_set_viewport(NULL);
lcd_clear_display();
/* Call device specific init */
lcd_init_device();
scroll_init();
}
/*** parameter handling ***/
void lcd_set_drawmode(int mode)
{
lcd_current_viewport->drawmode = mode & (DRMODE_SOLID|DRMODE_INVERSEVID);
}
int lcd_get_drawmode(void)
{
return lcd_current_viewport->drawmode;
}
void lcd_set_foreground(unsigned brightness)
{
lcd_current_viewport->fg_pattern = brightness;
fg_pattern = 0x55 * (~brightness & 3);
}
unsigned lcd_get_foreground(void)
{
return lcd_current_viewport->fg_pattern;
}
void lcd_set_background(unsigned brightness)
{
lcd_current_viewport->bg_pattern = brightness;
bg_pattern = 0x55 * (~brightness & 3);
}
unsigned lcd_get_background(void)
{
return lcd_current_viewport->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 lcd_current_viewport->width;
}
int lcd_getheight(void)
{
return lcd_current_viewport->height;
}
void lcd_setfont(int newfont)
{
lcd_current_viewport->font = newfont;
}
int lcd_getfont(void)
{
return lcd_current_viewport->font;
}
int lcd_getstringsize(const unsigned char *str, int *w, int *h)
{
return font_getstringsize(str, w, h, lcd_current_viewport->font);
}
/*** low-level drawing functions ***/
static void setpixel(int x, int y)
{
unsigned mask = pixmask[x & 3];
fb_data *address = FBADDR(x>>2,y);
unsigned data = *address;
*address = data ^ ((data ^ fg_pattern) & mask);
}
static void clearpixel(int x, int y)
{
unsigned mask = pixmask[x & 3];
fb_data *address = FBADDR(x>>2,y);
unsigned data = *address;
*address = data ^ ((data ^ bg_pattern) & mask);
}
static void clearimgpixel(int x, int y)
{
unsigned mask = pixmask[x & 3];
fb_data *address = FBADDR(x>>2,y);
unsigned data = *address;
*address = data ^ ((data ^ *(address + lcd_backdrop_offset)) & mask);
}
static void flippixel(int x, int y)
{
unsigned mask = pixmask[x & 3];
fb_data *address = FBADDR(x>>2,y);
*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)FBADDR(0,0);
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 (lcd_current_viewport->drawmode & DRMODE_INVERSEVID)
{
memset(FBADDR(0,0), fg_pattern, FRAMEBUFFER_SIZE);
}
else
{
if (lcd_backdrop)
memcpy(FBADDR(0,0), lcd_backdrop, FRAMEBUFFER_SIZE);
else
memset(FBADDR(0,0), bg_pattern, FRAMEBUFFER_SIZE);
}
lcd_scroll_info.lines = 0;
}
/* Clear the current viewport */
void lcd_clear_viewport(void)
{
int lastmode;
if (lcd_current_viewport == &default_vp &&
default_vp.buffer == &lcd_framebuffer_default)
{
lcd_clear_display();
}
else
{
lastmode = lcd_current_viewport->drawmode;
/* Invert the INVERSEVID bit and set basic mode to SOLID */
lcd_current_viewport->drawmode = (~lastmode & DRMODE_INVERSEVID) |
DRMODE_SOLID;
lcd_fillrect(0, 0, lcd_current_viewport->width, lcd_current_viewport->height);
lcd_current_viewport->drawmode = lastmode;
lcd_scroll_stop_viewport(lcd_current_viewport);
}
lcd_current_viewport->flags &= ~(VP_FLAG_VP_SET_CLEAN);
}
/* Set a single pixel */
void lcd_drawpixel(int x, int y)
{
if ( ((unsigned)x < (unsigned)lcd_current_viewport->width)
&& ((unsigned)y < (unsigned)lcd_current_viewport->height)
#if defined(HAVE_VIEWPORT_CLIP)
&& ((unsigned)x < (unsigned)LCD_WIDTH)
&& ((unsigned)y < (unsigned)LCD_HEIGHT)
#endif
)
lcd_pixelfuncs[lcd_current_viewport->drawmode](lcd_current_viewport->x + x, lcd_current_viewport->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[lcd_current_viewport->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)lcd_current_viewport->width)
&& ((unsigned)y < (unsigned)lcd_current_viewport->height)
#if defined(HAVE_VIEWPORT_CLIP)
&& ((unsigned)x < (unsigned)LCD_WIDTH)
&& ((unsigned)y < (unsigned)LCD_HEIGHT)
#endif
)
pfunc(lcd_current_viewport->x + x, lcd_current_viewport->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 nx;
unsigned char *dst;
unsigned mask, mask_right;
lcd_blockfunc_type *bfunc;
/* direction flip */
if (x2 < x1)
{
nx = x1;
x1 = x2;
x2 = nx;
}
/******************** In viewport clipping **********************/
/* nothing to draw? */
if (((unsigned)y >= (unsigned)lcd_current_viewport->height) || (x1 >= lcd_current_viewport->width)
|| (x2 < 0))
return;
if (x1 < 0)
x1 = 0;
if (x2 >= lcd_current_viewport->width)
x2 = lcd_current_viewport->width-1;
/* adjust to viewport */
x1 += lcd_current_viewport->x;
x2 += lcd_current_viewport->x;
y += lcd_current_viewport->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
bfunc = lcd_blockfuncs[lcd_current_viewport->drawmode];
dst = FBADDR(x1>>2,y);
nx = x2 - (x1 & ~3);
mask = 0xFFu >> (2 * (x1 & 3));
mask_right = 0xFFu << (2 * (~nx & 3));
for (; nx >= 4; nx -= 4)
{
bfunc(dst++, mask, 0xFFu);
mask = 0xFFu;
}
mask &= mask_right;
bfunc(dst, mask, 0xFFu);
}
/* Draw a vertical line (optimised) */
void lcd_vline(int x, int y1, int y2)
{
int y;
unsigned char *dst, *dst_end;
int stride_dst;
unsigned mask;
lcd_blockfunc_type *bfunc;
/* direction flip */
if (y2 < y1)
{
y = y1;
y1 = y2;
y2 = y;
}
/******************** In viewport clipping **********************/
/* nothing to draw? */
if (((unsigned)x >= (unsigned)lcd_current_viewport->width) || (y1 >= lcd_current_viewport->height)
|| (y2 < 0))
return;
if (y1 < 0)
y1 = 0;
if (y2 >= lcd_current_viewport->height)
y2 = lcd_current_viewport->height-1;
/* adjust for viewport */
y1 += lcd_current_viewport->y;
y2 += lcd_current_viewport->y;
x += lcd_current_viewport->x;
#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
bfunc = lcd_blockfuncs[lcd_current_viewport->drawmode];
dst = FBADDR(x>>2,y1);
stride_dst = LCD_FBSTRIDE(lcd_current_viewport->buffer->stride, 0);
mask = pixmask[x & 3];
dst_end = dst + (y2 - y1) * stride_dst;
do
{
bfunc(dst, mask, 0xFFu);
dst += stride_dst;
}
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)
{
int nx;
unsigned char *dst, *dst_end;
int stride_dst;
unsigned mask, mask_right;
lcd_blockfunc_type *bfunc;
/******************** In viewport clipping **********************/
/* nothing to draw? */
if ((width <= 0) || (height <= 0) || (x >= lcd_current_viewport->width) || (y >= lcd_current_viewport->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 > lcd_current_viewport->width)
width = lcd_current_viewport->width - x;
if (y + height > lcd_current_viewport->height)
height = lcd_current_viewport->height - y;
/* adjust for viewport */
x += lcd_current_viewport->x;
y += lcd_current_viewport->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
bfunc = lcd_blockfuncs[lcd_current_viewport->drawmode];
dst = FBADDR(x>>2,y);
stride_dst = LCD_FBSTRIDE(lcd_current_viewport->buffer->stride, 0);
nx = width - 1 + (x & 3);
mask = 0xFFu >> (2 * (x & 3));
mask_right = 0xFFu << (2 * (~nx & 3));
for (; nx >= 4; nx -= 4)
{
unsigned char *dst_col = dst;
dst_end = dst_col + height * stride_dst;
do
{
bfunc(dst_col, mask, 0xFFu);
dst_col += stride_dst;
}
while (dst_col < dst_end);
dst++;
mask = 0xFFu;
}
mask &= mask_right;
dst_end = dst + height * stride_dst;
do
{
bfunc(dst, mask, 0xFFu);
dst += stride_dst;
}
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. */
/* 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;
int stride_dst;
unsigned dmask = 0x100; /* bit 8 == sentinel */
unsigned dst_mask;
int drmode = lcd_current_viewport->drawmode;
/******************** Image in viewport clipping **********************/
/* nothing to draw? */
if ((width <= 0) || (height <= 0) || (x >= lcd_current_viewport->width) ||
(y >= lcd_current_viewport->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 > lcd_current_viewport->width)
width = lcd_current_viewport->width - x;
if (y + height > lcd_current_viewport->height)
height = lcd_current_viewport->height - y;
x += lcd_current_viewport->x; /* adjust for viewport */
y += lcd_current_viewport->y; /* adjust for viewport */
#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 = FBADDR(x >> 2,y);
stride_dst = LCD_FBSTRIDE(lcd_current_viewport->buffer->stride, 0);
dst_end = dst + height * stride_dst;
dst_mask = pixmask[x & 3];
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_mask;
dst_col += stride_dst;
UPDATE_SRC;
}
while (dst_col < dst_end);
break;
case DRMODE_BG:
if (lcd_backdrop)
{
bo = lcd_backdrop_offset;
do
{
if (!(data & 0x01))
{
unsigned block = *dst_col;
*dst_col = block
^ ((block ^ *(dst_col + bo)) & dst_mask);
}
dst_col += stride_dst;
UPDATE_SRC;
}
while (dst_col < dst_end);
}
else
{
bg = bg_pattern;
do
{
if (!(data & 0x01))
{
unsigned block = *dst_col;
*dst_col = block ^ ((block ^ bg) & dst_mask);
}
dst_col += stride_dst;
UPDATE_SRC;
}
while (dst_col < dst_end);
}
break;
case DRMODE_FG:
fg = fg_pattern;
do
{
if (data & 0x01)
{
unsigned block = *dst_col;
*dst_col = block ^ ((block ^ fg) & dst_mask);
}
dst_col += stride_dst;
UPDATE_SRC;
}
while (dst_col < dst_end);
break;
case DRMODE_SOLID:
fg = fg_pattern;
if (lcd_backdrop)
{
bo = lcd_backdrop_offset;
do
{
unsigned block = *dst_col;
*dst_col = block ^ ((block ^ ((data & 0x01) ?
fg : *(dst_col + bo))) & dst_mask);
dst_col += stride_dst;
UPDATE_SRC;
}
while (dst_col < dst_end);
}
else
{
bg = bg_pattern;
do
{
unsigned block = *dst_col;
*dst_col = block ^ ((block ^ ((data & 0x01) ?
fg : bg)) & dst_mask);
dst_col += stride_dst;
UPDATE_SRC;
}
while (dst_col < dst_end);
}
break;
}
dst_mask >>= 2;
if (dst_mask == 0)
{
dst++;
dst_mask = 0xC0;
}
}
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);
}
/* 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 horizontally,
* MSB at the left.
* The bytes are stored in row-major order, with byte 0 being top left,
* byte 1 2nd from left etc. Each row of bytes defines one pixel row.
*
* This is the same as the internal lcd hw format. */
/* Draw a partial native bitmap */
void ICODE_ATTR lcd_bitmap_part(const unsigned char *src, int src_x,
int src_y, int stride, int x, int y,
int width, int height)
{
int shift, nx;
unsigned char *dst, *dst_end;
int stride_dst;
unsigned mask, mask_right;
/******************** Image in viewport clipping **********************/
/* nothing to draw? */
if ((width <= 0) || (height <= 0) || (x >= lcd_current_viewport->width) ||
(y >= lcd_current_viewport->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 > lcd_current_viewport->width)
width = lcd_current_viewport->width - x;
if (y + height > lcd_current_viewport->height)
height = lcd_current_viewport->height - y;
/* adjust for viewport */
x += lcd_current_viewport->x;
y += lcd_current_viewport->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
stride = LCD_FBSTRIDE(stride, 0); /* convert to no. of bytes */
src += stride * src_y + (src_x >> 2); /* move starting point */
src_x &= 3;
x -= src_x;
dst = FBADDR(x>>2,y);
stride_dst = LCD_FBSTRIDE(lcd_current_viewport->buffer->stride, 0);
shift = x & 3;
nx = width - 1 + shift + src_x;
mask = 0xFF00u >> (2 * (shift + src_x));
mask_right = 0xFFu << (2 * (~nx & 3));
shift *= 2;
dst_end = dst + height * stride_dst;
do
{
const unsigned char *src_row = src;
unsigned char *dst_row = dst;
unsigned mask_row = mask >> 8;
unsigned data = 0;
for (x = nx; x >= 4; x -= 4)
{
data = (data << 8) | *src_row++;
if (mask_row & 0xFF)
{
setblock(dst_row, mask_row, data >> shift);
mask_row = 0xFF;
}
else
mask_row = mask;
dst_row++;
}
data = (data << 8) | *src_row;
setblock(dst_row, mask_row & mask_right, data >> shift);
src += stride;
dst += stride_dst;
}
while (dst < dst_end);
}
/* Draw a full native bitmap */
void lcd_bitmap(const unsigned char *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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