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

/* Framebuffer console based SDL video driver implementation.

*/

#include <fcntl.h>

#include <unistd.h>

#include <sys/ioctl.h>

#include <sys/mman.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_cursor_c.h"

#include "SDL_gsvideo.h"

#include "SDL_gsmouse_c.h"

#include "SDL_gsevents_c.h"

#include "SDL_gsyuv_c.h"

/* Initialization/Query functions */

static int GS_VideoInit(_THIS, SDL_PixelFormat *vformat);

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

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

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

static void GS_VideoQuit(_THIS);

/* Hardware surface functions */

static int GS_AllocHWSurface(_THIS, SDL_Surface *surface);

static int GS_LockHWSurface(_THIS, SDL_Surface *surface);

static void GS_UnlockHWSurface(_THIS, SDL_Surface *surface);

static void GS_FreeHWSurface(_THIS, SDL_Surface *surface);

/* GS driver bootstrap functions */

static int GS_Available(void)

{

int console, memory;

console = open(PS2_DEV_GS, O_RDWR, 0);

if ( console >= 0 ) {

close(console);

}

memory = open(PS2_DEV_MEM, O_RDWR, 0);

if ( memory >= 0 ) {

close(memory);

}

return((console >= 0) && (memory >= 0));

}

static void GS_DeleteDevice(SDL_VideoDevice *device)

{

SDL_free(device->hidden);

SDL_free(device);

}

static SDL_VideoDevice *GS_CreateDevice(int devindex)

{

SDL_VideoDevice *this;

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

}

if ( (this == NULL) || (this->hidden == NULL) ) {

SDL_OutOfMemory();

if ( this ) {

}

return(0);

}

mouse_fd = -1;

keyboard_fd = -1;

/* Set the function pointers */

this->VideoInit = GS_VideoInit;

this->ListModes = GS_ListModes;

this->SetVideoMode = GS_SetVideoMode;

this->CreateYUVOverlay = GS_CreateYUVOverlay;

this->SetColors = GS_SetColors;

this->UpdateRects = NULL;

this->VideoQuit = GS_VideoQuit;

this->AllocHWSurface = GS_AllocHWSurface;

this->CheckHWBlit = NULL;

this->FillHWRect = NULL;

this->SetHWColorKey = NULL;

this->SetHWAlpha = NULL;

this->LockHWSurface = GS_LockHWSurface;

this->UnlockHWSurface = GS_UnlockHWSurface;

this->FlipHWSurface = NULL;

this->FreeHWSurface = GS_FreeHWSurface;

this->SetIcon = NULL;

this->SetCaption = NULL;

this->GetWMInfo = NULL;

this->FreeWMCursor = GS_FreeWMCursor;

this->CreateWMCursor = GS_CreateWMCursor;

this->ShowWMCursor = GS_ShowWMCursor;

this->MoveWMCursor = GS_MoveWMCursor;

this->InitOSKeymap = GS_InitOSKeymap;

this->PumpEvents = GS_PumpEvents;

this->free = GS_DeleteDevice;

return this;

}

VideoBootStrap PS2GS_bootstrap = {

"ps2gs", "PlayStation 2 Graphics Synthesizer",

GS_Available, GS_CreateDevice

};

/* These are the pixel formats for the 32, 24, and 16 bit video modes */

static struct {

int bpp;

Uint32 r;

Uint32 g;

Uint32 b;

} GS_pixelmasks[] = {

{ 32, 0x000000FF, /* RGB little-endian */

0x0000FF00,

0x00FF0000 },

{ 24, 0x000000FF, /* RGB little-endian */

0x0000FF00,

0x00FF0000 },

{ 16, 0x0000001f, /* RGB little-endian */

0x000003e0,

0x00007c00 },

};

/* This is a mapping from SDL bytes-per-pixel to GS pixel format */

static int GS_formatmap[] = {

-1, /* 0 bpp, not a legal value */

-1, /* 8 bpp, not supported (yet?) */

PS2_GS_PSMCT16, /* 16 bpp */

PS2_GS_PSMCT24, /* 24 bpp */

PS2_GS_PSMCT32 /* 32 bpp */

};

static unsigned long long head_tags[] __attribute__((aligned(16))) = {

4 | (1LL << 60), /* GIFtag */

0x0e, /* A+D */

0, /* 2 */

PS2_GS_BITBLTBUF,

0, /* 4 */

PS2_GS_TRXPOS,

0, /* 6 */

PS2_GS_TRXREG,

0, /* 8 */

PS2_GS_TRXDIR

};

#define MAXIMG (32767 * 16)

#define MAXTAGS 8

static inline int loadimage_nonblock(int fd, struct ps2_image *image, int size,

unsigned long long *hm,

unsigned long long *im)

{

struct ps2_plist plist;

struct ps2_packet packet[1 + MAXTAGS * 2];

int isize;

int pnum, it, eop;

char *data;

/* initialize the variables */

data = (char *)image->ptr;

pnum = it = eop = 0;

plist.packet = packet;

/* make BITBLT packet */

packet[pnum].ptr = hm;

packet[pnum].len = sizeof(head_tags);

pnum++;

hm[2] = ((unsigned long long)image->fbp << 32) |

((unsigned long long)image->fbw << 48) |

((unsigned long long)image->psm << 56);

hm[4] = ((unsigned long long)image->x << 32) |

((unsigned long long)image->y << 48);

hm[6] = (unsigned long long)image->w |

((unsigned long long)image->h << 32);

/* make image mode tags */

while (!eop) {

isize = size > MAXIMG ? MAXIMG : size;

size -= isize;

eop = (size == 0);

packet[pnum].ptr = &im[it];

packet[pnum].len = sizeof(unsigned long long) * 2;

pnum++;

im[it++] = (isize >> 4) | (eop ? (1 << 15) : 0) | (2LL << 58);

im[it++] = 0;

packet[pnum].ptr = (void *)data;

packet[pnum].len = isize;

pnum++;

data += isize;

}

plist.num = pnum;

return ioctl(fd, PS2IOC_SENDL, &plist);

}

static unsigned long long tex_tags[] __attribute__((aligned(16))) = {

3 | (1LL << 60), /* GIFtag */

0x0e, /* A+D */

0, /* 2 */

PS2_GS_TEX0_1,

(1 << 5) + (1 << 6),

PS2_GS_TEX1_1,

0,

PS2_GS_TEXFLUSH

};

static unsigned long long scale_tags[] __attribute__((aligned(16))) = {

5 | (1LL << 60), /* GIFtag */

0x0e, /* A+D */

6 + (1 << 4) + (1 << 8),

PS2_GS_PRIM,

((unsigned long long)0 * 16) + (((unsigned long long)0 * 16) << 16),

PS2_GS_UV,

((unsigned long long)0 * 16) + (((unsigned long long)0 * 16) << 16),

PS2_GS_XYZ2,

0, /* 8 */

PS2_GS_UV,

0, /* 10 */

PS2_GS_XYZ2

};

int scaleimage_nonblock(int fd, unsigned long long *tm, unsigned long long *sm)

{

struct ps2_plist plist;

struct ps2_packet packet[2];

/* initialize the variables */

plist.num = 2;

plist.packet = packet;

packet[0].ptr = tm;

packet[0].len = sizeof(tex_tags);

packet[1].ptr = sm;

packet[1].len = sizeof(scale_tags);

return ioctl(fd, PS2IOC_SENDL, &plist);

}

static int power_of_2(int value)

{

int shift;

for ( shift = 0; (1<<shift) < value; ++shift ) {

/* Keep looking */ ;

}

return(shift);

}

static int GS_VideoInit(_THIS, SDL_PixelFormat *vformat)

{

struct ps2_screeninfo vinfo;

/* Initialize the library */

console_fd = open(PS2_DEV_GS, O_RDWR, 0);

if ( console_fd < 0 ) {

SDL_SetError("Unable to open %s", PS2_DEV_GS);

return(-1);

}

memory_fd = open(PS2_DEV_MEM, O_RDWR, 0);

if ( memory_fd < 0 ) {

close(console_fd);

console_fd = -1;

SDL_SetError("Unable to open %s", PS2_DEV_MEM);

return(-1);

}

/* Determine the current screen depth */

if ( ioctl(console_fd, PS2IOC_GSCREENINFO, &vinfo) < 0 ) {

close(memory_fd);

close(console_fd);

console_fd = -1;

SDL_SetError("Couldn't get console pixel format");

return(-1);

}

switch (vinfo.psm) {

/* Supported pixel formats */

case PS2_GS_PSMCT32:

case PS2_GS_PSMCT24:

case PS2_GS_PSMCT16:

break;

default:

GS_VideoQuit(this);

SDL_SetError("Unknown console pixel format: %d", vinfo.psm);

return(-1);

}

vformat->BitsPerPixel = GS_pixelmasks[vinfo.psm].bpp;

vformat->Rmask = GS_pixelmasks[vinfo.psm].r;

vformat->Gmask = GS_pixelmasks[vinfo.psm].g;

vformat->Bmask = GS_pixelmasks[vinfo.psm].b;

saved_vinfo = vinfo;

/* Enable mouse and keyboard support */

if ( GS_OpenKeyboard(this) < 0 ) {

GS_VideoQuit(this);

SDL_SetError("Unable to open keyboard");

return(-1);

}

if ( GS_OpenMouse(this) < 0 ) {

const char *sdl_nomouse;

if ( ! sdl_nomouse ) {

GS_VideoQuit(this);

SDL_SetError("Unable to open mouse");

return(-1);

}

}

/* We're done! */

return(0);

}

static SDL_Rect **GS_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags)

{

{ 0, 0, 1280, 1024 },

{ 0, 0, 1024, 768 },

{ 0, 0, 800, 600 },

{ 0, 0, 640, 480 }

};

static SDL_Rect *GS_vesa_modes[] = {

&GS_vesa_mode_list[0],

&GS_vesa_mode_list[1],

&GS_vesa_mode_list[2],

&GS_vesa_mode_list[3],

NULL

};

static SDL_Rect GS_tvout_stretch;

static SDL_Rect GS_tvout_mode;

static SDL_Rect *GS_tvout_modes[3];

SDL_Rect **modes = NULL;

switch (format->BitsPerPixel) {

case 16:

case 24:

case 32:

if ( saved_vinfo.mode == PS2_GS_VESA ) {

} else {

int i, j = 0;

// FIXME - what's wrong with the stretch code at 16 bpp?

if ( format->BitsPerPixel != 32 ) break;

/* Add a mode that we could possibly stretch to */

for ( i=0; GS_vesa_modes[i]; ++i ) {

if ( (GS_vesa_modes[i]->w == saved_vinfo.w) &&

(GS_vesa_modes[i]->h != saved_vinfo.h) ) {

GS_tvout_stretch.w=GS_vesa_modes[i]->w;

GS_tvout_stretch.h=GS_vesa_modes[i]->h;

GS_tvout_modes[j++] = &GS_tvout_stretch;

break;

}

}

/* Add the current TV video mode */

GS_tvout_mode.w = saved_vinfo.w;

GS_tvout_mode.h = saved_vinfo.h;

GS_tvout_modes[j++] = &GS_tvout_mode;

GS_tvout_modes[j++] = NULL;

/* Return the created list of modes */

modes = GS_tvout_modes;

}

break;

default:

break;

}

return(modes);

}

/* Various screen update functions available */

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

static SDL_Surface *GS_SetVideoMode(_THIS, SDL_Surface *current,

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

{

struct ps2_screeninfo vinfo;

/* Set the terminal into graphics mode */

if ( GS_EnterGraphicsMode(this) < 0 ) {

return(NULL);

}

/* Set the video mode and get the final screen format */

if ( ioctl(console_fd, PS2IOC_GSCREENINFO, &vinfo) < 0 ) {

SDL_SetError("Couldn't get console screen info");

return(NULL);

}

if ( (vinfo.w != width) || (vinfo.h != height) ||

(GS_pixelmasks[vinfo.psm].bpp != bpp) ) {

/* If we're not in VESA mode, we have to scale resolution */

if ( saved_vinfo.mode == PS2_GS_VESA ) {

switch (width) {

case 640:

vinfo.res = PS2_GS_640x480;

break;

case 800:

vinfo.res = PS2_GS_800x600;

break;

case 1024:

vinfo.res = PS2_GS_1024x768;

break;

case 1280:

vinfo.res = PS2_GS_1280x1024;

break;

default:

SDL_SetError("Unsupported resolution: %dx%d\n",

width, height);

return(NULL);

}

vinfo.res |= (PS2_GS_75Hz << 8);

vinfo.w = width;

vinfo.h = height;

}

vinfo.fbp = 0;

vinfo.psm = GS_formatmap[bpp/8];

if ( vinfo.psm < 0 ) {

SDL_SetError("Unsupported depth: %d bpp\n", bpp);

return(NULL);

}

if ( ioctl(console_fd, PS2IOC_SSCREENINFO, &vinfo) < 0 ) {

SDL_SetError("Couldn't set console screen info");

return(NULL);

}

/* Unmap the previous DMA buffer */

if ( mapped_mem ) {

munmap(mapped_mem, mapped_len);

mapped_mem = NULL;

}

}

if ( ! SDL_ReallocFormat(current, GS_pixelmasks[vinfo.psm].bpp,

GS_pixelmasks[vinfo.psm].r,

GS_pixelmasks[vinfo.psm].g,

GS_pixelmasks[vinfo.psm].b, 0) ) {

return(NULL);

}

/* Set up the new mode framebuffer */

current->flags = SDL_FULLSCREEN;

current->w = width;

current->h = height;

current->pitch = SDL_CalculatePitch(current);

/* Memory map the DMA area for block memory transfer */

if ( ! mapped_mem ) {

pixels_len = height * current->pitch;

mapped_len = pixels_len +

/* Screen update DMA command area */

sizeof(head_tags) + ((2 * MAXTAGS) * 16);

if ( saved_vinfo.mode != PS2_GS_VESA ) {

mapped_len += sizeof(tex_tags) + sizeof(scale_tags);

}

mapped_mem = mmap(0, mapped_len, PROT_READ|PROT_WRITE,

MAP_SHARED, memory_fd, 0);

if ( mapped_mem == MAP_FAILED ) {

SDL_SetError("Unable to map %d bytes for DMA",

mapped_len);

mapped_mem = NULL;

return(NULL);

}

/* Set up the entire screen for DMA transfer */

screen_image.ptr = mapped_mem;

screen_image.fbp = 0;

screen_image.fbw = (vinfo.w + 63) / 64;

screen_image.psm = vinfo.psm;

screen_image.x = 0;

if ( vinfo.h == height ) {

screen_image.y = 0;

} else {

/* Put image offscreen and scale to screen height */

screen_image.y = vinfo.h;

}

screen_image.w = current->w;

screen_image.h = current->h;

/* get screen image data size (qword aligned) */

switch (screen_image.psm) {

case PS2_GS_PSMCT32:

screen_image_size *= 4;

break;

case PS2_GS_PSMCT24:

screen_image_size *= 3;

break;

case PS2_GS_PSMCT16:

screen_image_size *= 2;

break;

}

screen_image_size = (screen_image_size + 15) & ~15;

/* Set up the memory for screen update DMA commands */

head_tags_mem = (unsigned long long *)

(mapped_mem + pixels_len);

image_tags_mem = (unsigned long long *)

((caddr_t)head_tags_mem + sizeof(head_tags));

if ( saved_vinfo.mode != PS2_GS_VESA ) {

tex_tags_mem = (unsigned long long *)

((caddr_t)image_tags_mem + ((2*MAXTAGS)*16));

scale_tags_mem = (unsigned long long *)

((caddr_t)tex_tags_mem + sizeof(tex_tags));

tex_tags_mem[2] =

(vinfo.h * vinfo.w) / 64 +

((unsigned long long)screen_image.fbw << 14) +

((unsigned long long)screen_image.psm << 20) +

((unsigned long long)power_of_2(screen_image.w) << 26) +

((unsigned long long)power_of_2(screen_image.h) << 30) +

((unsigned long long)1 << 34) +

((unsigned long long)1 << 35);

scale_tags_mem[8] =

((unsigned long long)screen_image.w * 16) +

(((unsigned long long)screen_image.h * 16) << 16);

scale_tags_mem[10] =

((unsigned long long)vinfo.w * 16) +

(((unsigned long long)vinfo.h * 16) << 16);

}

}

current->pixels = NULL;

/* Correct semantics */

current->flags |= SDL_ASYNCBLIT;

} else {

/* We lie here - the screen memory isn't really the visible

display memory and still requires an update, but this

has the desired effect for most applications.

*/

current->flags |= SDL_HWSURFACE;

}

/* Set the update rectangle function */

this->UpdateRects = GS_DMAFullUpdate;

/* We're done */

return(current);

}

/* We don't support hardware surfaces yet */

static int GS_AllocHWSurface(_THIS, SDL_Surface *surface)

{

return(-1);

}

static void GS_FreeHWSurface(_THIS, SDL_Surface *surface)

{

return;

}

static int GS_LockHWSurface(_THIS, SDL_Surface *surface)

{

if ( surface == this->screen ) {

/* Since mouse motion affects 'pixels', lock it */

SDL_LockCursor();

/* Make sure any pending DMA has completed */

if ( dma_pending ) {

ioctl(console_fd, PS2IOC_SENDQCT, 1);

dma_pending = 0;

}

/* If the cursor is drawn on the DMA area, remove it */

if ( cursor_drawn ) {

surface->pixels = mapped_mem + surface->offset;

SDL_EraseCursorNoLock(this->screen);

cursor_drawn = 0;

}

/* Set the surface pixels to the base of the DMA area */

surface->pixels = mapped_mem;

/* We're finished! */

SDL_UnlockCursor();

}

return(0);

}

static void GS_UnlockHWSurface(_THIS, SDL_Surface *surface)

{

if ( surface == this->screen ) {

/* Since mouse motion affects 'pixels', lock it */

SDL_LockCursor();

surface->pixels = NULL;

SDL_UnlockCursor();

}

}

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

{

/* Lock so we aren't interrupted by a mouse update */

SDL_LockCursor();

/* Make sure any pending DMA has completed */

if ( dma_pending ) {

ioctl(console_fd, PS2IOC_SENDQCT, 1);

dma_pending = 0;

}

/* If the mouse is visible, draw it on the DMA area */

if ( (SDL_cursorstate & CURSOR_VISIBLE) && !cursor_drawn ) {

this->screen->pixels = mapped_mem + this->screen->offset;

SDL_DrawCursorNoLock(this->screen);

this->screen->pixels = NULL;

cursor_drawn = 1;

}

/* Put the image onto the screen */

loadimage_nonblock(console_fd,

&screen_image, screen_image_size,

head_tags_mem, image_tags_mem);

if ( screen_image.y > 0 ) {

/* Need to scale offscreen image to TV output */

ioctl(console_fd, PS2IOC_SENDQCT, 1);

dma_pending = 0;

scaleimage_nonblock(console_fd, tex_tags_mem, scale_tags_mem);

} else {

dma_pending = 1;

}

/* We're finished! */

SDL_UnlockCursor();

}

static int GS_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors)

{

return(0);

}

static void GS_VideoQuit(_THIS)

{

/* Close console and input file descriptors */

if ( console_fd > 0 ) {

/* Unmap the video framebuffer */

if ( mapped_mem ) {

/* Unmap the video framebuffer */

munmap(mapped_mem, mapped_len);

mapped_mem = NULL;

}

close(memory_fd);

/* Restore the original video mode */

if ( GS_InGraphicsMode(this) ) {

ioctl(console_fd, PS2IOC_SSCREENINFO, &saved_vinfo);

}

/* We're all done with the graphics device */

close(console_fd);

console_fd = -1;

}

GS_CloseMouse(this);

GS_CloseKeyboard(this);

}