/*

    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 "SDL_config.h"

/*

	GEM video driver

	Patrice Mandin

	and work from

	Olivier Landemarre, Johan Klockars, Xavier Joubert, Claude Attard

*/

/* Mint includes */

#include <gem.h>

#include <gemx.h>

#include <mint/osbind.h>

#include <mint/cookie.h>

#include "SDL_endian.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 "../ataricommon/SDL_ataric2p_s.h"

#include "../ataricommon/SDL_atarieddi_s.h"

#include "../ataricommon/SDL_atarimxalloc_c.h"

#include "../ataricommon/SDL_atarigl_c.h"

#include "SDL_gemvideo.h"

#include "SDL_gemevents_c.h"

#include "SDL_gemmouse_c.h"

#include "SDL_gemwm_c.h"

#include "../ataricommon/SDL_xbiosevents_c.h"

#include "../ataricommon/SDL_ataridevmouse_c.h"

/* Defines */

/*#define DEBUG_VIDEO_GEM	1*/

#define GEM_VID_DRIVER_NAME "gem"

#undef MIN

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

#undef MAX

#define MAX(a,b) (((a)>(b)) ? (a) : (b))

/* Variables */

static unsigned char vdi_index[256] = {

	0,  2,  3,  6,  4,  7,  5,   8,

	9, 10, 11, 14, 12, 15, 13, 255

};

static const unsigned char empty_name[]="";

/* Initialization/Query functions */

static int GEM_VideoInit(_THIS, SDL_PixelFormat *vformat);

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

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

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

static void GEM_VideoQuit(_THIS);

/* Hardware surface functions */

static int GEM_AllocHWSurface(_THIS, SDL_Surface *surface);

static int GEM_LockHWSurface(_THIS, SDL_Surface *surface);

static int GEM_FlipHWSurface(_THIS, SDL_Surface *surface);

static void GEM_UnlockHWSurface(_THIS, SDL_Surface *surface);

static void GEM_FreeHWSurface(_THIS, SDL_Surface *surface);

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

#if 0

static int GEM_ToggleFullScreen(_THIS, int on);

#endif

/* Internal functions */

static void GEM_FreeBuffers(_THIS);

static void GEM_ClearScreen(_THIS);

static void GEM_ClearRect(_THIS, short *rect);

static void GEM_SetNewPalette(_THIS, Uint16 newpal[256][3]);

static void GEM_LockScreen(_THIS);

static void GEM_UnlockScreen(_THIS);

static void refresh_window(_THIS, int winhandle, short *rect);

#if SDL_VIDEO_OPENGL

/* OpenGL functions */

static void GEM_GL_SwapBuffers(_THIS);

#endif

/* GEM driver bootstrap functions */

static int GEM_Available(void)

{

	/* Test if AES available */

	if (appl_init() == -1)

		return 0;

	appl_exit();

	return 1;

}

static void GEM_DeleteDevice(SDL_VideoDevice *device)

{

	SDL_free(device->hidden);

	SDL_free(device);

}

static SDL_VideoDevice *GEM_CreateDevice(int devindex)

{

	SDL_VideoDevice *device;

	int vectors_mask;

	unsigned long dummy;

	/* 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));

		device->gl_data = (struct SDL_PrivateGLData *)

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

	}

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

		SDL_OutOfMemory();

		if ( device ) {

			SDL_free(device);

		}

		return(0);

	}

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

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

	/* Set the function pointers */

	device->VideoInit = GEM_VideoInit;

	device->ListModes = GEM_ListModes;

	device->SetVideoMode = GEM_SetVideoMode;

	device->SetColors = GEM_SetColors;

	device->UpdateRects = NULL /*GEM_UpdateRects*/;

	device->VideoQuit = GEM_VideoQuit;

	device->AllocHWSurface = GEM_AllocHWSurface;

	device->LockHWSurface = GEM_LockHWSurface;

	device->UnlockHWSurface = GEM_UnlockHWSurface;

	device->FlipHWSurface = GEM_FlipHWSurface;

	device->FreeHWSurface = GEM_FreeHWSurface;

	device->ToggleFullScreen = NULL /*GEM_ToggleFullScreen*/;

	/* Window manager */

	device->SetCaption = GEM_SetCaption;

	device->SetIcon = GEM_SetIcon;

	device->IconifyWindow = GEM_IconifyWindow;

	device->GrabInput = GEM_GrabInput;

	/* Events */

	device->InitOSKeymap = GEM_InitOSKeymap;

	device->PumpEvents = GEM_PumpEvents;

	/* Mouse */

	device->FreeWMCursor = GEM_FreeWMCursor;

	device->CreateWMCursor = GEM_CreateWMCursor;

	device->ShowWMCursor = GEM_ShowWMCursor;

	device->WarpWMCursor = NULL /*GEM_WarpWMCursor*/;

	device->CheckMouseMode = GEM_CheckMouseMode;

#if SDL_VIDEO_OPENGL

	/* OpenGL functions */

	device->GL_LoadLibrary = SDL_AtariGL_LoadLibrary;

	device->GL_GetProcAddress = SDL_AtariGL_GetProcAddress;

	device->GL_GetAttribute = SDL_AtariGL_GetAttribute;

	device->GL_MakeCurrent = SDL_AtariGL_MakeCurrent;

	device->GL_SwapBuffers = GEM_GL_SwapBuffers;

#endif

	device->hidden->use_dev_mouse =

		(SDL_AtariDevMouse_Open()!=0) ? SDL_TRUE : SDL_FALSE;

	vectors_mask = ATARI_XBIOS_JOYSTICKEVENTS;	/* XBIOS joystick events */

	if (!(device->hidden->use_dev_mouse)) {

		vectors_mask |= ATARI_XBIOS_MOUSEEVENTS;	/* XBIOS mouse events */

	}

/*	if (Getcookie(C_MiNT, &dummy)==C_FOUND) {

		vectors_mask = 0;

	}*/

	SDL_AtariXbios_InstallVectors(vectors_mask);

	device->free = GEM_DeleteDevice;

	return device;

}

VideoBootStrap GEM_bootstrap = {

	GEM_VID_DRIVER_NAME, "Atari GEM video driver",

	GEM_Available, GEM_CreateDevice

};

static void VDI_ReadExtInfo(_THIS, short *work_out)

{

	unsigned long EdDI_version;

	unsigned long cookie_EdDI;

	Uint32 num_colours;

	Uint16 clut_type, num_bits;

	/* Read EdDI informations */

	if  (Getcookie(C_EdDI, &cookie_EdDI) == C_NOTFOUND) {

		return;

	}

	EdDI_version = Atari_get_EdDI_version( (void *)cookie_EdDI);

	vq_scrninfo(VDI_handle, work_out);

	VDI_format = work_out[0];

	clut_type = work_out[1];

	num_bits = work_out[2];

	num_colours = *((Uint32 *) &work_out[3]);

	/* With EdDI>=1.1, we can have screen pitch, address and format

	 * so we can directly write to screen without using vro_cpyfm

	 */

	if (EdDI_version >= EDDI_11) {

		VDI_pitch = work_out[5];

		VDI_screen = (void *) *((unsigned long *) &work_out[6]);

	}

	switch(clut_type) {

		case VDI_CLUT_HARDWARE:

			{

				int i;

				Uint16 *tmp_p;

				tmp_p = (Uint16 *)&work_out[16];

				for (i=0;i<256;i++) {

					vdi_index[*tmp_p++] = i;

				}

			}

			break;

		case VDI_CLUT_SOFTWARE:

			{

				int component; /* red, green, blue, alpha, overlay */

				int num_bit;

				unsigned short *tmp_p;

				/* We can build masks with info here */

				tmp_p = (unsigned short *) &work_out[16];

				for (component=0;component<5;component++) {

					for (num_bit=0;num_bit<16;num_bit++) {

						unsigned short valeur;

						valeur = *tmp_p++;

						if (valeur == 0xffff) {

							continue;

						}

						switch(component) {

							case 0:

								VDI_redmask |= 1<< valeur;

								break;

							case 1:

								VDI_greenmask |= 1<< valeur;

								break;

							case 2:

								VDI_bluemask |= 1<< valeur;

								break;

							case 3:

								VDI_alphamask |= 1<< valeur;

								break;

						}

					}

				}

			}

			/* Remove lower green bits for Intel endian screen */

			if ((VDI_greenmask == ((7<<13)|3)) || (VDI_greenmask == ((7<<13)|7))) {

				VDI_greenmask &= ~(7<<13);

			}

			break;

		case VDI_CLUT_NONE:

			break;

	}

}

int GEM_VideoInit(_THIS, SDL_PixelFormat *vformat)

{

	int i, menubar_size;

	short work_in[12], work_out[272], dummy;

	/* Open AES (Application Environment Services) */

	if (appl_init() == -1) {

		fprintf(stderr,"Can not open AES\n");

		return 1;

	}

	/* Read version and features */

	GEM_version = aes_global[0];

	if (GEM_version >= 0x0410) {

		short ap_gout[4], errorcode;

		GEM_wfeatures=0;

		errorcode=appl_getinfo(AES_WINDOW, &ap_gout[0], &ap_gout[1], &ap_gout[2], &ap_gout[3]);

		if (errorcode==0) {

			GEM_wfeatures=ap_gout[0];			

		}

	}	

	/* Ask VDI physical workstation handle opened by AES */

	VDI_handle = graf_handle(&dummy, &dummy, &dummy, &dummy);

	if (VDI_handle<1) {

		fprintf(stderr,"Wrong VDI handle %d returned by AES\n",VDI_handle);

		return 1;

	}

	/* Open virtual VDI workstation */

	work_in[0]=Getrez()+2;

	for(i = 1; i < 10; i++)

		work_in[i] = 1;

	work_in[10] = 2;

	v_opnvwk(work_in, &VDI_handle, work_out);

	if (VDI_handle == 0) {

		fprintf(stderr,"Can not open VDI virtual workstation\n");

		return 1;

	}

	/* Read fullscreen size */

	VDI_w = work_out[0] + 1;

	VDI_h = work_out[1] + 1;

	/* Read desktop size and position */

	if (!wind_get(DESKTOP_HANDLE, WF_WORKXYWH, &GEM_desk_x, &GEM_desk_y, &GEM_desk_w, &GEM_desk_h)) {

		fprintf(stderr,"Can not read desktop properties\n");

		return 1;

	}

	/* Read bit depth */

	vq_extnd(VDI_handle, 1, work_out);

	VDI_bpp = work_out[4];

	VDI_oldnumcolors=0;

	switch(VDI_bpp) {

		case 8:

			VDI_pixelsize=1;

			break;

		case 15:

		case 16:

			VDI_pixelsize=2;

			break;

		case 24:

			VDI_pixelsize=3;

			break;

		case 32:

			VDI_pixelsize=4;

			break;

		default:

			fprintf(stderr,"%d bits colour depth not supported\n",VDI_bpp);

			return 1;

	}

	/* Setup hardware -> VDI palette mapping */

	for(i = 16; i < 255; i++) {

		vdi_index[i] = i;

	}

	vdi_index[255] = 1;

	/* Save current palette */

	if (VDI_bpp>8) {

		VDI_oldnumcolors=1<<8;

	} else {

		VDI_oldnumcolors=1<<VDI_bpp;

	}

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

		short rgb[3];

		vq_color(VDI_handle, i, 0, rgb);

		VDI_oldpalette[i][0] = rgb[0];

		VDI_oldpalette[i][1] = rgb[1];

		VDI_oldpalette[i][2] = rgb[2];

	}

	VDI_setpalette = GEM_SetNewPalette;

	SDL_memcpy(VDI_curpalette,VDI_oldpalette,sizeof(VDI_curpalette));

	/* Setup screen info */

	GEM_title_name = empty_name;

	GEM_icon_name = empty_name;

	GEM_handle = -1;

	GEM_locked = SDL_FALSE;

	GEM_win_fulled = SDL_FALSE;

	GEM_fullscreen = SDL_FALSE;

	GEM_lock_redraw = SDL_TRUE;	/* Prevent redraw till buffers are setup */

	VDI_screen = NULL;

	VDI_pitch = VDI_w * VDI_pixelsize;

	VDI_format = ( (VDI_bpp <= 8) ? VDI_FORMAT_INTER : VDI_FORMAT_PACK);

	VDI_redmask = VDI_greenmask = VDI_bluemask = VDI_alphamask = 0;

	VDI_ReadExtInfo(this, work_out);

#ifdef DEBUG_VIDEO_GEM

	printf("sdl:video:gem: screen: address=0x%08x, pitch=%d\n", VDI_screen, VDI_pitch);

	printf("sdl:video:gem: format=%d\n", VDI_format);

	printf("sdl:video:gem: masks: 0x%08x, 0x%08x, 0x%08x, 0x%08x\n",

		VDI_alphamask, VDI_redmask, VDI_greenmask, VDI_bluemask

	);

#endif

	/* Setup destination mfdb */

	VDI_dst_mfdb.fd_addr = NULL;

	/* Determine the current screen size */

	this->info.current_w = VDI_w;

	this->info.current_h = VDI_h;

	/* Determine the screen depth */

	/* we change this during the SDL_SetVideoMode implementation... */

	vformat->BitsPerPixel = VDI_bpp;

	/* Set mouse cursor to arrow */

	graf_mouse(ARROW, NULL);

	GEM_cursor = NULL;

	/* Init chunky to planar routine */

	SDL_Atari_C2pConvert = SDL_Atari_C2pConvert8;

	/* Setup VDI fill functions */

	vsf_color(VDI_handle,0);

	vsf_interior(VDI_handle,1);

	vsf_perimeter(VDI_handle,0);

	/* Menu bar save buffer */

	menubar_size = GEM_desk_w * GEM_desk_y * VDI_pixelsize;

	GEM_menubar=Atari_SysMalloc(menubar_size,MX_PREFTTRAM);

	/* Fill video modes list */

	SDL_modelist[0] = SDL_malloc(sizeof(SDL_Rect));

	SDL_modelist[0]->x = 0;

	SDL_modelist[0]->y = 0;

	SDL_modelist[0]->w = VDI_w;

	SDL_modelist[0]->h = VDI_h;

	SDL_modelist[1] = NULL;

#if SDL_VIDEO_OPENGL

	SDL_AtariGL_InitPointers(this);

#endif

	this->info.wm_available = 1;

	/* We're done! */

	return(0);

}

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

{

	if (format->BitsPerPixel != VDI_bpp) {

		return ((SDL_Rect **)NULL);

	}

	if (flags & SDL_FULLSCREEN) {

		return (SDL_modelist);

	}

	return((SDL_Rect **)-1);

}

static void GEM_FreeBuffers(_THIS)

{

	/* Release buffer */

	if ( GEM_buffer2 ) {

		Mfree( GEM_buffer2 );

		GEM_buffer2=NULL;

	}

	if ( GEM_buffer1 ) {

		Mfree( GEM_buffer1 );

		GEM_buffer1=NULL;

	}

}

static void GEM_ClearRect(_THIS, short *rect)

{

	short oldrgb[3], rgb[3]={0,0,0};

	vq_color(VDI_handle, vdi_index[0], 0, oldrgb);

	vs_color(VDI_handle, vdi_index[0], rgb);

	vsf_color(VDI_handle,0);

	vsf_interior(VDI_handle,1);

	vsf_perimeter(VDI_handle,0);

	v_bar(VDI_handle, rect);

	vs_color(VDI_handle, vdi_index[0], oldrgb);

}

static void GEM_ClearScreen(_THIS)

{

	short pxy[4];

	v_hide_c(VDI_handle);

	pxy[0] = pxy[1] = 0;

	pxy[2] = VDI_w - 1;

	pxy[3] = VDI_h - 1;

	GEM_ClearRect(this, pxy);