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LCD flip (upside down) and a high-performance blit function

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4143 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jörg Hohensohn 2003-12-12 22:11:08 +00:00
parent e3be10107d
commit 56271b571a
3 changed files with 158 additions and 7 deletions
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48
firmware/drivers/lcd-recorder.c
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@ -103,10 +103,8 @@ static struct scrollinfo scroll[SCROLLABLE_LINES];
static int xmargin = 0;
static int ymargin = 0;
static int curfont = FONT_SYSFIXED;
static int xoffset = 0; /* needed for flip */
#ifndef SIMULATOR
static
#endif
unsigned char lcd_framebuffer[LCD_WIDTH][LCD_HEIGHT/8];
/* All zeros and ones bitmaps for area filling */
@ -163,6 +161,25 @@ void lcd_init (void)
sizeof(scroll_stack), scroll_name);
}
/* Performance function that works with an external buffer
note that y and height are in 8-pixel units! */
void lcd_blit (unsigned char* p_data, int x, int y, int width, int height, int stride) __attribute__ ((section (".icode")));
void lcd_blit (unsigned char* p_data, int x, int y, int width, int height, int stride)
{
/* Copy display bitmap to hardware */
while (height--)
{
lcd_write (true, LCD_CNTL_PAGE | (y++ & 0xf));
lcd_write (true, LCD_CNTL_HIGHCOL | (((x+xoffset)>>4) & 0xf));
lcd_write (true, LCD_CNTL_LOWCOL | ((x+xoffset) & 0xf));
lcd_write_data(p_data, width);
p_data += stride;
}
}
/*
* Update the display.
* This must be called after all other LCD functions that change the display.
@ -176,8 +193,8 @@ void lcd_update (void)
for (y = 0; y < LCD_HEIGHT/8; y++)
{
lcd_write (true, LCD_CNTL_PAGE | (y & 0xf));
lcd_write (true, LCD_CNTL_HIGHCOL);
lcd_write (true, LCD_CNTL_LOWCOL);
lcd_write (true, LCD_CNTL_HIGHCOL | ((xoffset>>4) & 0xf));
lcd_write (true, LCD_CNTL_LOWCOL | (xoffset & 0xf));
for (x = 0; x < LCD_WIDTH; x++)
lcd_write (false, lcd_framebuffer[x][y]);
@ -210,8 +227,8 @@ void lcd_update_rect (int x_start, int y,
for (; y <= ymax; y++)
{
lcd_write (true, LCD_CNTL_PAGE | (y & 0xf));
lcd_write (true, LCD_CNTL_HIGHCOL | ((x_start>>4) & 0xf));
lcd_write (true, LCD_CNTL_LOWCOL | (x_start & 0xf));
lcd_write (true, LCD_CNTL_HIGHCOL | (((x_start+xoffset)>>4) & 0xf));
lcd_write (true, LCD_CNTL_LOWCOL | ((x_start+xoffset) & 0xf));
for (x = x_start; x < xmax; x++)
lcd_write (false, lcd_framebuffer[x][y]);
@ -232,6 +249,23 @@ void lcd_set_invert_display(bool yesno)
lcd_write(true, LCD_SET_NORMAL_DISPLAY);
}
/* turn the display upside down (call lcd_update() afterwards) */
void lcd_set_flip(bool yesno)
{
if (yesno)
{
lcd_write(true, LCD_SET_SEGMENT_REMAP);
lcd_write(true, LCD_SET_COM_OUTPUT_SCAN_DIRECTION);
xoffset = 132 - LCD_WIDTH; /* 132 colums minus the 112 we have */
}
else
{
lcd_write(true, LCD_SET_SEGMENT_REMAP | 0x01);
lcd_write(true, LCD_SET_COM_OUTPUT_SCAN_DIRECTION | 0x08);
xoffset = 0;
}
}
/**
* Rolls up the lcd display by the specified amount of lines.
* Lines that are rolled out over the top of the screen are