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/*
Interface to the Dreambox dm800/dm8000 proprietary accel interface.
*/
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <linux/fb.h>
#include <sys/mman.h>
#include <sys/ioctl.h>
#define FBIO_ACCEL 0x23
static unsigned int displaylist[1024];
static int ptr;
#define P(x, y) do { displaylist[ptr++] = x; displaylist[ptr++] = y; } while (0)
#define C(x) P(x, 0)
static int fb_fd;
static int exec_list(void);
int bcm_accel_init(void)
{
fb_fd = open("/dev/fb0", O_RDWR);
if (fb_fd < 0)
{
perror("/dev/fb0");
return 1;
}
if (exec_list())
{
fprintf(stderr, "BCM accel interface not available - %m\n");
close(fb_fd);
return 1;
}
return 0;
}
void bcm_accel_close(void)
{
close(fb_fd);
}
static int exec_list(void)
{
int ret;
struct
{
void *ptr;
int len;
} l;
l.ptr = displaylist;
l.len = ptr;
ret = ioctl(fb_fd, FBIO_ACCEL, &l);
ptr = 0;
return ret;
}
void bcm_accel_blit(
int src_addr, int src_width, int src_height, int src_stride, int src_format,
int dst_addr, int dst_width, int dst_height, int dst_stride,
int src_x, int src_y, int width, int height,
int dst_x, int dst_y, int dwidth, int dheight,
int pal_addr, int flags)
{
C(0x43); // reset source
C(0x53); // reset dest
C(0x5b); // reset pattern
C(0x67); // reset blend
C(0x75); // reset output
P(0x0, src_addr); // set source addr
P(0x1, src_stride); // set source pitch
P(0x2, src_width); // source width
P(0x3, src_height); // height
switch (src_format)
{
case 0:
P(0x4, 0x7e48888); // format: ARGB 8888
break;
case 1:
P(0x4, 0x12e40008); // indexed 8bit
P(0x78, 256);
P(0x79, pal_addr);
P(0x7a, 0x7e48888);
break;
}
C(0x5); // set source surface (based on last parameters)
P(0x2e, src_x); // define rect
P(0x2f, src_y);
P(0x30, width);
P(0x31, height);
C(0x32); // set this rect as source rect
P(0x0, dst_addr); // prepare output surface
P(0x1, dst_stride);
P(0x2, dst_width);
P(0x3, dst_height);
P(0x4, 0x7e48888);
C(0x69); // set output surface
P(0x2e, dst_x); // prepare output rect
P(0x2f, dst_y);
P(0x30, dwidth);
P(0x31, dheight);
C(0x6e); // set this rect as output rect
C(0x77); // do it
exec_list();
}
void bcm_accel_fill(
int dst_addr, int dst_width, int dst_height, int dst_stride,
int x, int y, int width, int height,
unsigned long color)
{
C(0x43); // reset source
C(0x53); // reset dest
C(0x5b); // reset pattern
C(0x67); // reset blend
C(0x75); // reset output
// clear dest surface
P(0x0, 0);
P(0x1, 0);
P(0x2, 0);
P(0x3, 0);
P(0x4, 0);
C(0x45);
// clear src surface
P(0x0, 0);
P(0x1, 0);
P(0x2, 0);
P(0x3, 0);
P(0x4, 0);
C(0x5);
P(0x2d, color);
P(0x2e, x); // prepare output rect
P(0x2f, y);
P(0x30, width);
P(0x31, height);
C(0x6e); // set this rect as output rect
P(0x0, dst_addr); // prepare output surface
P(0x1, dst_stride);
P(0x2, dst_width);
P(0x3, dst_height);
P(0x4, 0x7e48888);
C(0x69); // set output surface
P(0x6f, 0);
P(0x70, 0);
P(0x71, 2);
P(0x72, 2);
C(0x73); // select color keying
C(0x77); // do it
exec_list();
}
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