sdl_gemvideo.c

linux下面的一个开源的多媒体中间件

/*
    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
    [e-mail]
*/
#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;