/*

SDL - Simple DirectMedia Layer

Copyright (C) 1997-2006 Sam Lantinga

This library is free software; you can redistribute it and/or

modify it under the terms of the GNU Lesser General Public

License as published by the Free Software Foundation; either

version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public

License along with this library; if not, write to the Free Software

Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

Sam Lantinga

slouken@libsdl.org

*/

#include <sys/time.h>

#include <sys/mman.h>

#include <sys/ioctl.h>

#include <dev/wscons/wsdisplay_usl_io.h>

#include <fcntl.h>

#include <unistd.h>

#include <errno.h>

#include "SDL_video.h"

#include "SDL_mouse.h"

#include "../SDL_sysvideo.h"

#include "../SDL_pixels_c.h"

#include "../../events/SDL_events_c.h"

#include "SDL_wsconsvideo.h"

#include "SDL_wsconsevents_c.h"

#include "SDL_wsconsmouse_c.h"

#define WSCONSVID_DRIVER_NAME "wscons"

enum {

WSCONS_ROTATE_NONE = 0,

WSCONS_ROTATE_CCW = 90,

WSCONS_ROTATE_UD = 180,

WSCONS_ROTATE_CW = 270

};

#define min(a,b) ((a)<(b)?(a):(b))

/* Initialization/Query functions */

static int WSCONS_VideoInit(_THIS, SDL_PixelFormat *vformat);

static SDL_Rect **WSCONS_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags);

static SDL_Surface *WSCONS_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags);

static int WSCONS_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors);

static void WSCONS_VideoQuit(_THIS);

/* Hardware surface functions */

static int WSCONS_AllocHWSurface(_THIS, SDL_Surface *surface);

static int WSCONS_LockHWSurface(_THIS, SDL_Surface *surface);

static void WSCONS_UnlockHWSurface(_THIS, SDL_Surface *surface);

static void WSCONS_FreeHWSurface(_THIS, SDL_Surface *surface);

/* etc. */

static WSCONS_bitBlit WSCONS_blit16;

static WSCONS_bitBlit WSCONS_blit16blocked;

static void WSCONS_UpdateRects(_THIS, int numrects, SDL_Rect *rects);

void WSCONS_ReportError(char *fmt, ...)

{

char message[200];

message[199] = '\0';

va_list vaArgs;

va_start(vaArgs, fmt);

vsnprintf(message, 199, fmt, vaArgs);

va_end(vaArgs);

SDL_SetError(message);

fprintf(stderr, "WSCONS error: %s\n", message);

}

/* WSCONS driver bootstrap functions */

static int WSCONS_Available(void)

{

return 1;

}

static void WSCONS_DeleteDevice(SDL_VideoDevice *device)

{

SDL_free(device->hidden);

SDL_free(device);

}

static SDL_VideoDevice *WSCONS_CreateDevice(int devindex)

{

SDL_VideoDevice *device;

/* Initialize all variables that we clean on shutdown */

device = (SDL_VideoDevice *)SDL_malloc(sizeof(SDL_VideoDevice));

if (device == NULL) {

SDL_OutOfMemory();

return 0;

}

SDL_memset(device, 0, (sizeof *device));

device->hidden =

(struct SDL_PrivateVideoData *)SDL_malloc((sizeof *device->hidden));

if (device->hidden == NULL) {

SDL_OutOfMemory();

SDL_free(device);

return(0);

}

SDL_memset(device->hidden, 0, (sizeof *device->hidden));

device->hidden->fd = -1;

/* Set the function pointers */

device->VideoInit = WSCONS_VideoInit;

device->ListModes = WSCONS_ListModes;

device->SetVideoMode = WSCONS_SetVideoMode;

device->SetColors = WSCONS_SetColors;

device->UpdateRects = WSCONS_UpdateRects;

device->VideoQuit = WSCONS_VideoQuit;

device->AllocHWSurface = WSCONS_AllocHWSurface;

device->LockHWSurface = WSCONS_LockHWSurface;

device->UnlockHWSurface = WSCONS_UnlockHWSurface;

device->FreeHWSurface = WSCONS_FreeHWSurface;

device->InitOSKeymap = WSCONS_InitOSKeymap;

device->PumpEvents = WSCONS_PumpEvents;

device->free = WSCONS_DeleteDevice;

return device;

}

VideoBootStrap WSCONS_bootstrap = {

WSCONSVID_DRIVER_NAME,

"SDL wscons video driver",

WSCONS_Available,

WSCONS_CreateDevice

};

#define WSCONSDEV_FORMAT "/dev/ttyC%01x"

int WSCONS_VideoInit(_THIS, SDL_PixelFormat *vformat)

{

char devnamebuf[30];

char *devname;

char *rotation;

int wstype;

int wsmode = WSDISPLAYIO_MODE_DUMBFB;

size_t len, mapsize;

int pagemask;

int width, height;

devname = SDL_getenv("SDL_WSCONSDEV");

if (devname == NULL) {

int activeVT;

if (ioctl(STDIN_FILENO, VT_GETACTIVE, &activeVT) == -1) {

WSCONS_ReportError("Unable to determine active terminal: %s",

strerror(errno));

return -1;

}

SDL_snprintf(devnamebuf, sizeof(devnamebuf), WSCONSDEV_FORMAT, activeVT - 1);

devname = devnamebuf;

}

private->fd = open(devname, O_RDWR | O_NONBLOCK, 0);

if (private->fd == -1) {

WSCONS_ReportError("open %s: %s", devname, strerror(errno));

return -1;

}

if (ioctl(private->fd, WSDISPLAYIO_GINFO, &private->info) == -1) {

WSCONS_ReportError("ioctl WSDISPLAY_GINFO: %s", strerror(errno));

return -1;

}

if (ioctl(private->fd, WSDISPLAYIO_GTYPE, &wstype) == -1) {

WSCONS_ReportError("ioctl WSDISPLAY_GTYPE: %s", strerror(errno));

return -1;

}

if (ioctl(private->fd, WSDISPLAYIO_LINEBYTES, &private->physlinebytes) == -1) {

WSCONS_ReportError("ioctl WSDISPLAYIO_LINEBYTES: %s", strerror(errno));

return -1;

}

if (private->info.depth > 8) {

if (wstype == WSDISPLAY_TYPE_SUN24 ||

wstype == WSDISPLAY_TYPE_SUNCG12 ||

wstype == WSDISPLAY_TYPE_SUNCG14 ||

wstype == WSDISPLAY_TYPE_SUNTCX ||

wstype == WSDISPLAY_TYPE_SUNFFB) {

private->redMask = 0x0000ff;

private->greenMask = 0x00ff00;

private->blueMask = 0xff0000;

#ifdef WSDISPLAY_TYPE_PXALCD

} else if (wstype == WSDISPLAY_TYPE_PXALCD) {

private->redMask = 0x1f << 11;

private->greenMask = 0x3f << 5;

private->blueMask = 0x1f;

#endif

} else {

WSCONS_ReportError("Unknown video hardware");

return -1;

}

} else {

WSCONS_ReportError("Displays with 8 bpp or less are not supported");

return -1;

}

private->rotate = WSCONS_ROTATE_NONE;

rotation = SDL_getenv("SDL_VIDEO_WSCONS_ROTATION");

if (rotation != NULL) {

if (SDL_strlen(rotation) == 0) {

private->shadowFB = 0;

private->rotate = WSCONS_ROTATE_NONE;

printf("Not rotating, no shadow\n");

} else if (!SDL_strcmp(rotation, "NONE")) {

private->shadowFB = 1;

private->rotate = WSCONS_ROTATE_NONE;

printf("Not rotating, but still using shadow\n");

} else if (!SDL_strcmp(rotation, "CW")) {

private->shadowFB = 1;

private->rotate = WSCONS_ROTATE_CW;

printf("Rotating screen clockwise\n");

} else if (!SDL_strcmp(rotation, "CCW")) {

private->shadowFB = 1;

private->rotate = WSCONS_ROTATE_CCW;

printf("Rotating screen counter clockwise\n");

} else if (!SDL_strcmp(rotation, "UD")) {

private->shadowFB = 1;

private->rotate = WSCONS_ROTATE_UD;

printf("Rotating screen upside down\n");

} else {

WSCONS_ReportError("\"%s\" is not a valid value for "

"SDL_VIDEO_WSCONS_ROTATION", rotation);

return -1;

}

}

switch (private->info.depth) {

case 1:

case 4:

case 8:

len = private->physlinebytes * private->info.height;

break;

case 16:

if (private->physlinebytes == private->info.width) {

len = private->info.width * private->info.height * sizeof(short);

} else {

len = private->physlinebytes * private->info.height;

}

if (private->rotate == WSCONS_ROTATE_NONE ||

private->rotate == WSCONS_ROTATE_UD) {

private->blitFunc = WSCONS_blit16;

} else {

private->blitFunc = WSCONS_blit16blocked;

}

break;

case 32:

if (private->physlinebytes == private->info.width) {

len = private->info.width * private->info.height * sizeof(int);

} else {

len = private->physlinebytes * private->info.height;

}

break;

default:

WSCONS_ReportError("unsupported depth %d", private->info.depth);

return -1;

}

if (private->shadowFB && private->blitFunc == NULL) {

WSCONS_ReportError("Using software buffer, but no blitter function is "

"available for this %d bpp.", private->info.depth);

return -1;

}

if (ioctl(private->fd, WSDISPLAYIO_SMODE, &wsmode) == -1) {

WSCONS_ReportError("ioctl SMODE");

return -1;

}

pagemask = getpagesize() - 1;

mapsize = ((int)len + pagemask) & ~pagemask;

private->physmem = (Uint8 *)mmap(NULL, mapsize,

PROT_READ | PROT_WRITE, MAP_SHARED,

private->fd, (off_t)0);

if (private->physmem == (Uint8 *)MAP_FAILED) {

private->physmem = NULL;

WSCONS_ReportError("mmap: %s", strerror(errno));

return -1;

}

private->fbmem_len = len;

if (private->rotate == WSCONS_ROTATE_CW ||

private->rotate == WSCONS_ROTATE_CCW) {

width = private->info.height;

height = private->info.width;

} else {

width = private->info.width;

height = private->info.height;

}

if (private->shadowFB) {

private->shadowmem = (Uint8 *)SDL_malloc(len);

if (private->shadowmem == NULL) {

WSCONS_ReportError("No memory for shadow");

return -1;

}

private->fbstart = private->shadowmem;

private->fblinebytes = width * ((private->info.depth + 7) / 8);

} else {

private->fbstart = private->physmem;

private->fblinebytes = private->physlinebytes;

}

private->SDL_modelist[0] = (SDL_Rect *)SDL_malloc(sizeof(SDL_Rect));

private->SDL_modelist[0]->w = width;

private->SDL_modelist[0]->h = height;

vformat->BitsPerPixel = private->info.depth;

vformat->BytesPerPixel = private->info.depth / 8;

if (WSCONS_InitKeyboard(this) == -1) {

return -1;

}

return 0;

}

SDL_Rect **WSCONS_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags)

{

if (format->BitsPerPixel == private->info.depth) {

return private->SDL_modelist;

} else {

return NULL;

}

}

SDL_Surface *WSCONS_SetVideoMode(_THIS, SDL_Surface *current,

int width, int height, int bpp, Uint32 flags)

{

if (width != private->SDL_modelist[0]->w ||

height != private->SDL_modelist[0]->h) {

WSCONS_ReportError("Requested video mode %dx%d not supported.",

width, height);

return NULL;

}

if (bpp != private->info.depth) {

WSCONS_ReportError("Requested video depth %d bpp not supported.", bpp);

return NULL;

}

if (!SDL_ReallocFormat(current,

bpp,

private->redMask,

private->greenMask,

private->blueMask,

0)) {

WSCONS_ReportError("Couldn't allocate new pixel format");

return NULL;

}

current->flags &= SDL_FULLSCREEN;

if (private->shadowFB) {

current->flags |= SDL_SWSURFACE;

} else {

current->flags |= SDL_HWSURFACE;

}

current->w = width;

current->h = height;

current->pitch = private->fblinebytes;

current->pixels = private->fbstart;

SDL_memset(private->fbstart, 0, private->fbmem_len);

return current;

}

static int WSCONS_AllocHWSurface(_THIS, SDL_Surface *surface)

{

return -1;

}

static void WSCONS_FreeHWSurface(_THIS, SDL_Surface *surface)

{

}

static int WSCONS_LockHWSurface(_THIS, SDL_Surface *surface)

{

return 0;

}

static void WSCONS_UnlockHWSurface(_THIS, SDL_Surface *surface)

{

}

static void WSCONS_blit16(Uint8 *byte_src_pos,

int height)

{

int w;

Uint16 *src_pos = (Uint16 *)byte_src_pos;

Uint16 *dst_pos = (Uint16 *)byte_dst_pos;

while (height) {

Uint16 *src = src_pos;

Uint16 *dst = dst_pos;

for (w = width; w != 0; w--) {

*dst = *src;

src += srcRightDelta;

dst++;

}

dst_pos = (Uint16 *)((Uint8 *)dst_pos + dst_linebytes);

src_pos += srcDownDelta;

height--;

}

}

#define BLOCKSIZE_W 32

#define BLOCKSIZE_H 32

static void WSCONS_blit16blocked(Uint8 *byte_src_pos,

int height)

{

int w;

Uint16 *src_pos = (Uint16 *)byte_src_pos;

Uint16 *dst_pos = (Uint16 *)byte_dst_pos;

while (height > 0) {

Uint16 *src = src_pos;

Uint16 *dst = dst_pos;

for (w = width; w > 0; w -= BLOCKSIZE_W) {

WSCONS_blit16((Uint8 *)src,

srcRightDelta,

srcDownDelta,

(Uint8 *)dst,

dst_linebytes,

min(w, BLOCKSIZE_W),

min(height, BLOCKSIZE_H));

src += srcRightDelta * BLOCKSIZE_W;

dst += BLOCKSIZE_W;

}

dst_pos = (Uint16 *)((Uint8 *)dst_pos + dst_linebytes * BLOCKSIZE_H);

src_pos += srcDownDelta * BLOCKSIZE_H;

height -= BLOCKSIZE_H;

}

}

static void WSCONS_UpdateRects(_THIS, int numrects, SDL_Rect *rects)

{

int width = private->SDL_modelist[0]->w;

int height = private->SDL_modelist[0]->h;

int bytesPerPixel = (private->info.depth + 7) / 8;

int i;

if (!private->shadowFB) {

return;

}

if (private->info.depth != 16) {

WSCONS_ReportError("Shadow copy only implemented for 16 bpp");

return;

}

for (i = 0; i < numrects; i++) {

int x1, y1, x2, y2;

int scr_x1, scr_y1, scr_x2, scr_y2;

int sha_x1, sha_y1;

int shadowRightDelta; /* Address change when moving right in dest */

int shadowDownDelta; /* Address change when moving down in dest */

Uint8 *src_start;

Uint8 *dst_start;

x1 = rects[i].x;

y1 = rects[i].y;

x2 = x1 + rects[i].w;

y2 = y1 + rects[i].h;

if (x1 < 0) {

x1 = 0;

} else if (x1 > width) {

x1 = width;

}

if (x2 < 0) {

x2 = 0;

} else if (x2 > width) {

x2 = width;

}

if (y1 < 0) {

y1 = 0;

} else if (y1 > height) {

y1 = height;

}

if (y2 < 0) {

y2 = 0;

} else if (y2 > height) {

y2 = height;

}

if (x2 <= x1 || y2 <= y1) {

continue;

}

switch (private->rotate) {

case WSCONS_ROTATE_NONE:

sha_x1 = scr_x1 = x1;

sha_y1 = scr_y1 = y1;

scr_x2 = x2;

scr_y2 = y2;

shadowRightDelta = 1;

shadowDownDelta = width;

break;

case WSCONS_ROTATE_CCW:

scr_x1 = y1;

scr_y1 = width - x2;

scr_x2 = y2;

scr_y2 = width - x1;

sha_x1 = x2 - 1;

sha_y1 = y1;

shadowRightDelta = width;

shadowDownDelta = -1;

break;

case WSCONS_ROTATE_UD:

scr_x1 = width - x2;

scr_y1 = height - y2;

scr_x2 = width - x1;

scr_y2 = height - y1;

sha_x1 = x2 - 1;

sha_y1 = y2 - 1;

shadowRightDelta = -1;

shadowDownDelta = -width;

break;

case WSCONS_ROTATE_CW:

scr_x1 = height - y2;

scr_y1 = x1;

scr_x2 = height - y1;

scr_y2 = x2;

sha_x1 = x1;

sha_y1 = y2 - 1;

shadowRightDelta = -width;

shadowDownDelta = 1;

break;

default:

WSCONS_ReportError("Unknown rotation");

return;

}

src_start = private->shadowmem + (sha_y1 * width + sha_x1) * bytesPerPixel;

dst_start = private->physmem + scr_y1 * private->physlinebytes +

scr_x1 * bytesPerPixel;

private->blitFunc(src_start,

shadowRightDelta,

shadowDownDelta,

dst_start,

private->physlinebytes,

scr_x2 - scr_x1,

scr_y2 - scr_y1);

}

}

int WSCONS_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors)

{

return 0;

}

/*

* Note: If we are terminated, this could be called in the middle of

* another SDL video routine -- notably UpdateRects.

*/

void WSCONS_VideoQuit(_THIS)

{

int mode = WSDISPLAYIO_MODE_EMUL;

if (private->shadowmem != NULL) {

SDL_free(private->shadowmem);

private->shadowmem = NULL;

}

private->fbstart = NULL;

if (this->screen != NULL) {

this->screen->pixels = NULL;

}

if (private->SDL_modelist[0] != NULL) {

SDL_free(private->SDL_modelist[0]);

private->SDL_modelist[0] = NULL;

}

if (ioctl(private->fd, WSDISPLAYIO_SMODE, &mode) == -1) {

WSCONS_ReportError("ioctl SMODE");

}

WSCONS_ReleaseKeyboard(this);

if (private->fd != -1) {

close(private->fd);

private->fd = -1;

}

}