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rockbox/firmware/drivers/lcd-1bit-vert.c
Aidan MacDonald 9549ddabba lcd: Fix bug in grayscale clear_display() implementation 
clear_display() on grayscale LCDs sets the number of scrolling
lines to 0 but that's wrong, the scollers need to be shut down
first. Call scroll_stop() for that, as is done on color LCDs.

Change-Id: I75fb6839ed04f6fe1eb8e2855c8db820fcedddb8
2022-10-12 07:58:57 -04:00

441 lines
11 KiB
C
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 by Alan Korr
*
* 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 "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"
#ifndef LCDFN /* Not compiling for remote - define macros for main LCD. */
#define LCDFN(fn) lcd_ ## fn
#define FBFN(fn) fb_ ## fn
#define FBSIZE FRAMEBUFFER_SIZE
#define LCDM(ma) LCD_ ## ma
#define LCDNAME "lcd_"
#define LCDFB(x,y) FBADDR(x, y)
#define MAIN_LCD
#endif
#ifdef MAIN_LCD
#define THIS_STRIDE STRIDE_MAIN
#else
#define THIS_STRIDE STRIDE_REMOTE
#endif
#define CURRENT_VP LCDFN(current_viewport)
/*** globals ***/
static FBFN(data) LCDFN(static_framebuffer)[LCDM(FBHEIGHT)][LCDM(FBWIDTH)] IRAM_LCDFRAMEBUFFER;
static void *LCDFN(frameaddress_default)(int x, int y);
/* shouldn't be changed unless you want system-wide framebuffer changes! */
struct frame_buffer_t LCDFN(framebuffer_default) =
{
.FBFN(ptr) = &LCDFN(static_framebuffer)[0][0],
.get_address_fn = &LCDFN(frameaddress_default),
.stride = THIS_STRIDE(LCDM(WIDTH), LCDM(HEIGHT)),
.elems = (LCDM(FBWIDTH)*LCDM(FBHEIGHT)),
};
static struct viewport default_vp =
{
.x = 0,
.y = 0,
.width = LCDM(WIDTH),
.height = LCDM(HEIGHT),
.flags = 0,
.font = FONT_SYSFIXED,
.drawmode = DRMODE_SOLID,
.buffer = NULL,
};
struct viewport* CURRENT_VP;
static void *LCDFN(frameaddress_default)(int x, int y)
{
/* the default expects a buffer the same size as the screen */
struct frame_buffer_t *fb = CURRENT_VP->buffer;
#if defined(MAIN_LCD) && LCD_STRIDEFORMAT == VERTICAL_STRIDE
size_t element = (x * LCDM(NATIVE_STRIDE)(fb->stride)) + y;
#else
size_t element = (y * LCDM(NATIVE_STRIDE)(fb->stride)) + x;
#endif
return fb->FBFN(ptr) + element;/*(element % fb->elems);*/
}
#include "lcd-bitmap-common.c"
/* LCD init */
void LCDFN(init)(void)
{
/* Initialize the viewport */
LCDFN(set_viewport)(NULL);
LCDFN(clear_display)();
LCDFN(init_device)();
#ifdef MAIN_LCD
scroll_init();
#endif
}
/*** low-level drawing functions ***/
static void setpixel(int x, int y)
{
*LCDFB(x,y>>3) |= BIT_N(y & 7);
}
static void clearpixel(int x, int y)
{
*LCDFB(x,y>>3) &= ~BIT_N(y & 7);
}
static void flippixel(int x, int y)
{
*LCDFB(x,y>>3) ^= BIT_N(y & 7);
}
static void nopixel(int x, int y)
{
(void)x;
(void)y;
}
LCDFN(pixelfunc_type)* const LCDFN(pixelfuncs)[8] = {
flippixel, nopixel, setpixel, setpixel,
nopixel, clearpixel, nopixel, clearpixel
};
static void ICODE_ATTR flipblock(FBFN(data) *address, unsigned mask,
unsigned bits)
{
*address ^= bits & mask;
}
static void ICODE_ATTR bgblock(FBFN(data) *address, unsigned mask,
unsigned bits)
{
*address &= bits | ~mask;
}
static void ICODE_ATTR fgblock(FBFN(data) *address, unsigned mask,
unsigned bits)
{
*address |= bits & mask;
}
static void ICODE_ATTR solidblock(FBFN(data) *address, unsigned mask,
unsigned bits)
{
unsigned data = *(char*)address;
bits ^= data;
*address = data ^ (bits & mask);
}
static void ICODE_ATTR flipinvblock(FBFN(data) *address, unsigned mask,
unsigned bits)
{
*address ^= ~bits & mask;
}
static void ICODE_ATTR bginvblock(FBFN(data) *address, unsigned mask,
unsigned bits)
{
*address &= ~(bits & mask);
}
static void ICODE_ATTR fginvblock(FBFN(data) *address, unsigned mask,
unsigned bits)
{
*address |= ~bits & mask;
}
static void ICODE_ATTR solidinvblock(FBFN(data) *address, unsigned mask,
unsigned bits)
{
unsigned data = *(char *)address;
bits = ~bits ^ data;
*address = data ^ (bits & mask);
}
LCDFN(blockfunc_type)* const LCDFN(blockfuncs)[8] = {
flipblock, bgblock, fgblock, solidblock,
flipinvblock, bginvblock, fginvblock, solidinvblock
};
/*** drawing functions ***/
/* Clear the whole display */
void LCDFN(clear_display)(void)
{
unsigned bits = (CURRENT_VP->drawmode & DRMODE_INVERSEVID) ? 0xFFu : 0;
memset(LCDFB(0, 0), bits, FBSIZE);
LCDFN(scroll_stop)();
}
/* Draw a horizontal line (optimised) */
void LCDFN(hline)(int x1, int x2, int y)
{
struct viewport *vp = CURRENT_VP;
int width;
unsigned char *dst, *dst_end;
unsigned mask;
LCDFN(blockfunc_type) *bfunc;
if (!clip_viewport_hline(vp, &x1, &x2, &y))
return;
width = x2 - x1 + 1;
bfunc = LCDFN(blockfuncs)[vp->drawmode];
dst = LCDFB(x1,y>>3);
mask = BIT_N(y & 7);
dst_end = dst + width;
do
bfunc(dst++, mask, 0xFFu);
while (dst < dst_end);
}
/* Draw a vertical line (optimised) */
void LCDFN(vline)(int x, int y1, int y2)
{
struct viewport *vp = CURRENT_VP;
int ny;
FBFN(data) *dst;
int stride_dst;
unsigned mask, mask_bottom;
LCDFN(blockfunc_type) *bfunc;
if (!clip_viewport_vline(vp, &x, &y1, &y2))
return;
bfunc = LCDFN(blockfuncs)[vp->drawmode];
dst = LCDFB(x,y1>>3);
ny = y2 - (y1 & ~7);
mask = 0xFFu << (y1 & 7);
mask_bottom = 0xFFu >> (~ny & 7);
stride_dst = vp->buffer->stride;
for (; ny >= 8; ny -= 8)
{
bfunc(dst, mask, 0xFFu);
dst += stride_dst;
mask = 0xFFu;
}
mask &= mask_bottom;
bfunc(dst, mask, 0xFFu);
}
/* Fill a rectangular area */
void LCDFN(fillrect)(int x, int y, int width, int height)
{
struct viewport *vp = CURRENT_VP;
int ny;
FBFN(data) *dst, *dst_end;
int stride_dst;
unsigned mask, mask_bottom;
unsigned bits = 0;
LCDFN(blockfunc_type) *bfunc;
bool fillopt = false;
if (!clip_viewport_rect(vp, &x, &y, &width, &height, NULL, NULL))
return;
if (vp->drawmode & DRMODE_INVERSEVID)
{
if (vp->drawmode & DRMODE_BG)
{
fillopt = true;
}
}
else
{
if (vp->drawmode & DRMODE_FG)
{
fillopt = true;
bits = 0xFFu;
}
}
bfunc = LCDFN(blockfuncs)[vp->drawmode];
dst = LCDFB(x,y>>3);
ny = height - 1 + (y & 7);
mask = 0xFFu << (y & 7);
mask_bottom = 0xFFu >> (~ny & 7);
stride_dst = vp->buffer->stride;
for (; ny >= 8; ny -= 8)
{
if (fillopt && (mask == 0xFFu))
memset(dst, bits, width);
else
{
FBFN(data) *dst_row = dst;
dst_end = dst_row + width;
do
bfunc(dst_row++, mask, 0xFFu);
while (dst_row < dst_end);
}
dst += stride_dst;
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 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 same as the internal lcd hw format. */
/* Draw a partial bitmap */
void ICODE_ATTR LCDFN(bitmap_part)(const unsigned char *src, int src_x,
int src_y, int stride, int x, int y,
int width, int height)
{
struct viewport *vp = CURRENT_VP;
int shift, ny;
FBFN(data) *dst, *dst_end;
int stride_dst;
unsigned mask, mask_bottom;
LCDFN(blockfunc_type) *bfunc;
if (!clip_viewport_rect(vp, &x, &y, &width, &height, &src_x, &src_y))
return;
src += stride * (src_y >> 3) + src_x; /* move starting point */
src_y &= 7;
y -= src_y;
dst = LCDFB(x,y>>3);
stride_dst = vp->buffer->stride;
shift = y & 7;
ny = height - 1 + shift + src_y;
bfunc = LCDFN(blockfuncs)[vp->drawmode];
mask = 0xFFu << (shift + src_y);
mask_bottom = 0xFFu >> (~ny & 7);
if (shift == 0)
{
bool copyopt = (vp->drawmode == DRMODE_SOLID);
for (; ny >= 8; ny -= 8)
{
if (copyopt && (mask == 0xFFu))
memcpy(dst, src, width);
else
{
const unsigned char *src_row = src;
FBFN(data) *dst_row = dst;
dst_end = dst_row + width;
do
bfunc(dst_row++, mask, *src_row++);
while (dst_row < dst_end);
}
src += stride;
dst += stride_dst;
mask = 0xFFu;
}
mask &= mask_bottom;
if (copyopt && (mask == 0xFFu))
memcpy(dst, src, width);
else
{
dst_end = dst + width;
do
bfunc(dst++, mask, *src++);
while (dst < dst_end);
}
}
else
{
dst_end = dst + width;
do
{
const unsigned char *src_col = src++;
FBFN(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 & 0xFFu)
{
bfunc(dst_col, mask_col, data);
mask_col = 0xFFu;
}
else
mask_col >>= 8;
src_col += stride;
dst_col += stride_dst;
data >>= 8;
}
data |= *src_col << shift;
bfunc(dst_col, mask_col & mask_bottom, data);
}
while (dst < dst_end);
}
}
/* Draw a full bitmap */
void LCDFN(bitmap)(const unsigned char *src, int x, int y, int width,
int height)
{
LCDFN(bitmap_part)(src, 0, 0, width, x, y, width, height);
}
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