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rockbox/firmware/drivers/lcd-16bit.c
Amaury Pouly d7871914ac Fix dangerous casts 
On Windows 64-bit, the size of long is 32-bit, thus any pointer to long cast is
not valid. In any case, one should use intptr_t and ptrdiff_t when casting
to integers. This commit attempts to fix all instances reported by GCC.
When relevant, I replaced code by the macros PTR_ADD, ALIGN_UP from system.h

Change-Id: I2273b0e8465d3c4689824717ed5afa5ed238a2dc
2017-02-04 17:24:47 +01:00

402 lines
11 KiB
C
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2005 by Dave Chapman
* Copyright (C) 2009 by Karl Kurbjun
*
* 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"
#define ROW_INC LCD_WIDTH
#define COL_INC 1
extern lcd_fastpixelfunc_type* const lcd_fastpixelfuncs_backdrop[];
extern lcd_fastpixelfunc_type* const lcd_fastpixelfuncs_bgcolor[];
static void ICODE_ATTR lcd_alpha_bitmap_part_mix(const fb_data* image,
const unsigned char *src, int src_x,
int src_y, int x, int y,
int width, int height,
int stride_image, int stride_src);
#include "lcd-color-common.c"
#include "lcd-bitmap-common.c"
#include "lcd-16bit-common.c"
/*** drawing functions ***/
/* 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 = FBADDR(x1, y);
switch (fillopt)
{
case OPT_SET:
memset16(dst, bits, width);
break;
case OPT_COPY:
memcpy(dst, PTR_ADD(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 = FBADDR(x , y1);
dst_end = dst + (y2 - y1) * LCD_WIDTH;
do
{
pfunc(dst);
dst += LCD_WIDTH;
}
while (dst <= dst_end);
}
/* 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 = FBADDR(x, y);
do
{
memcpy(dst, src, width * sizeof(fb_data));
src += stride;
dst += LCD_WIDTH;
}
while (--height > 0);
}
/* 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 = FBADDR(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
}
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