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Screen buffer transposed, such that bytes in X-direction are consecutive. This enables my turbocharged lcd_write_data() for regular screen updates. Please check the X11 sim, Win32 works.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4177 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jörg Hohensohn 2003-12-23 23:41:45 +00:00
parent 2d720b2a79
commit 5040cc53ec
6 changed files with 40 additions and 37 deletions
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39
firmware/drivers/lcd-recorder.c
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@ -107,7 +107,7 @@ static int curfont = FONT_SYSFIXED;
static int xoffset = 0; /* needed for flip */
#endif
unsigned char lcd_framebuffer[LCD_WIDTH][LCD_HEIGHT/8];
unsigned char lcd_framebuffer[LCD_HEIGHT/8][LCD_WIDTH];
/* All zeros and ones bitmaps for area filling */
static unsigned char zeros[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
@ -166,7 +166,6 @@ void lcd_init (void)
/* 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 */
@ -189,7 +188,7 @@ void lcd_blit (unsigned char* p_data, int x, int y, int width, int height, int s
void lcd_update (void) __attribute__ ((section (".icode")));
void lcd_update (void)
{
int x, y;
int y;
/* Copy display bitmap to hardware */
for (y = 0; y < LCD_HEIGHT/8; y++)
@ -198,8 +197,7 @@ void lcd_update (void)
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]);
lcd_write_data (lcd_framebuffer[y], LCD_WIDTH);
}
}
@ -211,17 +209,15 @@ void lcd_update_rect (int x_start, int y,
int width, int height)
{
int ymax;
int xmax;
int x;
/* The Y coordinates have to work on even 8 pixel rows */
ymax = (y + height)/8;
ymax = (y + height-1)/8;
y /= 8;
xmax = x_start + width;
if(xmax > LCD_WIDTH)
xmax = LCD_WIDTH;
if(x_start + width > LCD_WIDTH)
width = LCD_WIDTH - x_start;
if (width <= 0)
return; /* nothing left to do, 0 is harmful to lcd_write_data() */
if(ymax >= LCD_HEIGHT/8)
ymax = LCD_HEIGHT/8-1;
@ -232,8 +228,7 @@ void lcd_update_rect (int x_start, int y,
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]);
lcd_write_data (&lcd_framebuffer[y][x_start], width);
}
}
@ -459,7 +454,15 @@ void lcd_bitmap (unsigned char *src, int x, int y, int nx, int ny,
ny = LCD_HEIGHT - y;
shift = y & 7;
dst2 = &lcd_framebuffer[x][y/8];
dst2 = &lcd_framebuffer[y/8][x];
/* short cut for byte aligned match (e.g. standard text) */
if (!shift && ny==8)
{
memcpy(dst2, src, nx);
return;
}
ny += shift;
/* Calculate bit masks */
@ -479,7 +482,7 @@ void lcd_bitmap (unsigned char *src, int x, int y, int nx, int ny,
for (x = 0; x < nx; x++)
{
dst = dst2;
dst2 += LCD_HEIGHT/8;
dst2++;
data = 0;
y = 0;
@ -489,7 +492,7 @@ void lcd_bitmap (unsigned char *src, int x, int y, int nx, int ny,
data = *src++ << shift;
*dst = (*dst & mask) | data;
data >>= 8;
dst++;
dst += LCD_WIDTH;
/* Intermediate rows */
for (y = 8; y < ny-8; y += 8)
@ -497,7 +500,7 @@ void lcd_bitmap (unsigned char *src, int x, int y, int nx, int ny,
data |= *src++ << shift;
*dst = (*dst & mask2) | data;
data >>= 8;
dst++;
dst += LCD_WIDTH;
}
}