/*

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

Micah Dowty

micahjd@users.sourceforge.net

*/

#include "SDL.h"

#include "SDL_stdlib.h"

#include "SDL_string.h"

#include "SDL_error.h"

#include "SDL_video.h"

#include "SDL_mouse.h"

#include "SDL_sysvideo.h"

#include "SDL_pixels_c.h"

#include "SDL_events_c.h"

#include "SDL_pgvideo.h"

#include "SDL_pgevents_c.h"

#define PGVID_DRIVER_NAME "picogui"

/* Initialization/Query functions */

static int PG_VideoInit(_THIS, SDL_PixelFormat *vformat);

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

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

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

static void PG_VideoQuit(_THIS);

/* Hardware surface functions */

static int PG_AllocHWSurface(_THIS, SDL_Surface *surface);

static int PG_LockHWSurface(_THIS, SDL_Surface *surface);

static void PG_UnlockHWSurface(_THIS, SDL_Surface *surface);

static void PG_FreeHWSurface(_THIS, SDL_Surface *surface);

/* etc. */

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

// The implementation dependent data for the window manager cursor

struct WMcursor {

/* Our cursor is a PicoGUI theme */

pghandle theme;

} ;

/* WM functions */

void PG_SetCaption(_THIS, const char *title, const char *icon);

WMcursor * PG_CreateWMCursor (_THIS,Uint8 * data, Uint8 * mask,

int w, int h, int hot_x, int hot_y);

void PG_FreeWMCursor (_THIS, WMcursor * cursor);

void PG_WarpWMCursor(_THIS, Uint16 x, Uint16 y);

int PG_ShowWMCursor (_THIS, WMcursor * cursor);

/* PicoGUI driver bootstrap functions */

static int PG_Available(void)

{

/* FIXME: The current client lib doesn't give a way to see if the picogui

* server is reachable without causing a fatal error if it isn't.

* This should be fixed in cli_c2, but until then assume we can

* connect. Since more common drivers like X11 are probed first anyway,

* this shouldn't be a huge problem.

*/

return(1);

}

static void PG_DeleteDevice(SDL_VideoDevice *device)

{

SDL_free(device->hidden);

SDL_free(device);

}

static SDL_VideoDevice *PG_CreateDevice(int devindex)

{

SDL_VideoDevice *device;

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

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

if ( device ) {

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

device->hidden = (struct SDL_PrivateVideoData *)

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

}

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

SDL_OutOfMemory();

if ( device ) {

SDL_free(device);

}

return(0);

}

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

/* Set the function pointers */

device->VideoInit = PG_VideoInit;

device->ListModes = PG_ListModes;

device->SetVideoMode = PG_SetVideoMode;

device->CreateYUVOverlay = NULL;

device->SetColors = PG_SetColors;

device->UpdateRects = PG_UpdateRects;

device->VideoQuit = PG_VideoQuit;

device->AllocHWSurface = PG_AllocHWSurface;

device->CheckHWBlit = NULL;

device->FillHWRect = NULL;

device->SetHWColorKey = NULL;

device->SetHWAlpha = NULL;

device->LockHWSurface = PG_LockHWSurface;

device->UnlockHWSurface = PG_UnlockHWSurface;

device->FlipHWSurface = NULL;

device->FreeHWSurface = PG_FreeHWSurface;

device->SetCaption = PG_SetCaption;

device->SetIcon = NULL;

device->IconifyWindow = NULL;

device->GrabInput = NULL;

device->PumpEvents = PG_PumpEvents;

device->InitOSKeymap = PG_InitOSKeymap;

device->ShowWMCursor = PG_ShowWMCursor;

device->CreateWMCursor = PG_CreateWMCursor;

device->FreeWMCursor = PG_FreeWMCursor;

device->WarpWMCursor = PG_WarpWMCursor;

device->free = PG_DeleteDevice;

return device;

}

VideoBootStrap PG_bootstrap = {

PGVID_DRIVER_NAME, "PicoGUI SDL driver",

PG_Available, PG_CreateDevice

};

int PG_VideoInit(_THIS, SDL_PixelFormat *vformat)

{

/* Connect to the PicoGUI server. No way to process command line args yet,

* but since this is based on SHM it's not important to be able to specify

* a remote PicoGUI server.

*

* FIXME: Another nitpick about the current client lib is there's no

* clean way to indicate that command line args are not available.

*/

pgInit(0,(char**)"");

this->hidden->mi = *pgGetVideoMode();

/* Create a picogui application and canvas. We'll populate the canvas later. */

this->hidden->wApp = pgRegisterApp(PG_APP_NORMAL,"SDL",0);

this->hidden->wCanvas = pgNewWidget(PG_WIDGET_CANVAS,0,0);

pgSetWidget(PGDEFAULT,

PG_WP_SIDE, PG_S_ALL,

0);

PG_InitEvents(this);

/* Determine the screen depth.

* We change this during the SDL_SetVideoMode implementation...

* Round up to the nearest Bytes per pixel

*/

vformat->BitsPerPixel = this->hidden->mi.bpp;

vformat->BytesPerPixel = this->hidden->mi.bpp >> 3;

if (this->hidden->mi.bpp & 7)

vformat->BytesPerPixel++;

/* We're done! */

return(0);

}

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

{

return (SDL_Rect **) -1;

}

SDL_Surface *PG_SetVideoMode(_THIS, SDL_Surface *current,

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

{

if ( this->hidden->bitmap ) {

/* Free old bitmap */

if (current->pixels) {

shmdt(current->pixels);

current->pixels = NULL;

}

pgDelete(this->hidden->bitmap);

}

/* Allocate the new pixel format for the screen */

if ( ! SDL_ReallocFormat(current, bpp, 0, 0, 0, 0) ) {

SDL_SetError("Couldn't allocate new pixel format for requested mode");

return(NULL);

}

/* Create a new picogui bitmap */

this->hidden->bitmap = pgCreateBitmap(width,height);

this->hidden->shm = *pgMakeSHMBitmap(this->hidden->bitmap);

current->pixels = shmat(shmget(this->hidden->shm.shm_key,

this->hidden->shm.shm_length,0),NULL,0);

/* Reset the canvas, and draw persistent and incremental grops.

* Use mapping and offsets to center it.

*/

pgWriteCmd(this->hidden->wCanvas, PGCANVAS_NUKE, 0);

/* 0. Set the source position during incremental rendering

*/

pgWriteCmd(this->hidden->wCanvas, PGCANVAS_GROP, 5, PG_GROP_SETSRC,0,0,0,0);

pgWriteCmd(this->hidden->wCanvas, PGCANVAS_GROPFLAGS, 1, PG_GROPF_INCREMENTAL);

/* 1. Incremental bitmap rendering

*/

pgWriteCmd(this->hidden->wCanvas, PGCANVAS_GROP, 6, PG_GROP_BITMAP,

0,0,0,0,this->hidden->bitmap);

pgWriteCmd(this->hidden->wCanvas, PGCANVAS_GROPFLAGS, 1, PG_GROPF_INCREMENTAL);

/* 2. Normal bitmap rendering

*/

pgWriteCmd(this->hidden->wCanvas, PGCANVAS_GROP, 6, PG_GROP_BITMAP,

0,0,this->hidden->shm.width,this->hidden->shm.height,this->hidden->bitmap);

/* Set up the new mode framebuffer */

current->flags = 0;

current->w = this->hidden->shm.width;

current->h = this->hidden->shm.height;

current->pitch = this->hidden->shm.pitch;

/* Set up pixel format */

current->format->BitsPerPixel = this->hidden->shm.bpp;

current->format->BytesPerPixel = this->hidden->shm.bpp >> 3;

if (this->hidden->shm.bpp & 7)

current->format->BytesPerPixel++;

current->format->palette = NULL;

current->format->Rmask = this->hidden->shm.red_mask;

current->format->Gmask = this->hidden->shm.green_mask;

current->format->Bmask = this->hidden->shm.blue_mask;

current->format->Amask = this->hidden->shm.alpha_mask;

current->format->Rshift = this->hidden->shm.red_shift;

current->format->Gshift = this->hidden->shm.green_shift;

current->format->Bshift = this->hidden->shm.blue_shift;

current->format->Ashift = this->hidden->shm.alpha_shift;

current->format->Rloss = 8 - this->hidden->shm.red_length;

current->format->Gloss = 8 - this->hidden->shm.green_length;

current->format->Bloss = 8 - this->hidden->shm.blue_length;

current->format->Aloss = 8 - this->hidden->shm.alpha_length;

/* Draw the app */

pgUpdate();

/* We're done */

return(current);

}

/* We don't actually allow hardware surfaces other than the main one */

static int PG_AllocHWSurface(_THIS, SDL_Surface *surface)

{

return(-1);

}

static void PG_FreeHWSurface(_THIS, SDL_Surface *surface)

{

return;

}

/* We need to wait for vertical retrace on page flipped displays */

static int PG_LockHWSurface(_THIS, SDL_Surface *surface)

{

return(0);

}

static void PG_UnlockHWSurface(_THIS, SDL_Surface *surface)

{

return;

}

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

{

int i;

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

if (rects[i].w <= 0 || rects[i].h <= 0)

continue;

/* Schedule an incremental update for this rectangle, using

* the canvas gropnodes we've loaded beforehand.

*/

pgWriteCmd(this->hidden->wCanvas, PGCANVAS_FINDGROP, 1, 0);

pgWriteCmd(this->hidden->wCanvas, PGCANVAS_MOVEGROP, 4,

rects[i].x, rects[i].y,

rects[i].w, rects[i].h);

pgWriteCmd(this->hidden->wCanvas, PGCANVAS_FINDGROP, 1, 1);

pgWriteCmd(this->hidden->wCanvas, PGCANVAS_MOVEGROP, 4,

rects[i].x, rects[i].y,

rects[i].w, rects[i].h);

/* Go perform the update */

pgWriteCmd(this->hidden->wCanvas, PGCANVAS_INCREMENTAL, 0);

pgSubUpdate(this->hidden->wCanvas);

}

}

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

{

/* do nothing of note. */

return(1);

}

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

another SDL video routine -- notably UpdateRects.

*/

void PG_VideoQuit(_THIS)

{

if (this->screen->pixels != NULL)

{

shmdt(this->screen->pixels);

this->screen->pixels = NULL;

pgDelete(this->hidden->bitmap);

}

pgDelete(this->hidden->wCanvas);

pgDelete(this->hidden->wApp);

}

void PG_SetCaption(_THIS, const char *title, const char *icon)

{

if (title != NULL)

pgReplaceText(this->hidden->wApp, title);

pgUpdate();

}

/* FIXME: The cursor stuff isn't implemented yet! */

WMcursor * PG_CreateWMCursor (_THIS,Uint8 * data, Uint8 * mask,

int w, int h, int hot_x, int hot_y)

{

static WMcursor dummy;

return &dummy;

}

void PG_FreeWMCursor (_THIS, WMcursor * cursor)

{

}

void PG_WarpWMCursor(_THIS, Uint16 x, Uint16 y)

{

}

int PG_ShowWMCursor (_THIS, WMcursor * cursor)

{

return 1;

}