/*

SDL - Simple DirectMedia Layer

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

modify it under the terms of the GNU Library General Public

License as published by the Free Software Foundation; either

version 2 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

Library General Public License for more details.

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

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

Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

Sam Lantinga

slouken@libsdl.org

*/

#ifdef SAVE_RCSID

static char rcsid =

"@(#) $Id$";

#endif

/*

GEM video driver

Patrice Mandin

and work from

Olivier Landemarre, Johan Klockars, Xavier Joubert, Claude Attard

*/

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#ifdef HAVE_OPENGL

#include <GL/osmesa.h>

#endif

/* Mint includes */

#include <gem.h>

#include <gemx.h>

#include <mint/osbind.h>

#include "SDL.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_ataric2p_s.h"

#include "SDL_atarieddi_s.h"

#include "SDL_atarimxalloc_c.h"

#include "SDL_gemvideo.h"

#include "SDL_gemevents_c.h"

#include "SDL_gemmouse_c.h"

#include "SDL_gemwm_c.h"

/* Defines */

#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_LockScreen(_THIS);

static void GEM_UnlockScreen(_THIS);

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

#ifdef HAVE_OPENGL

/* OpenGL functions */

static int GEM_GL_LoadLibrary(_THIS, const char *path);

static void *GEM_GL_GetProcAddress(_THIS, const char *proc);

static int GEM_GL_GetAttribute(_THIS, SDL_GLattr attrib, int* value);

static int GEM_GL_MakeCurrent(_THIS);

static void GEM_GL_SwapBuffers(_THIS);

static void GEM_GL_ConvertNull(SDL_Surface *surface);

static void GEM_GL_Convert565To555be(SDL_Surface *surface);

static void GEM_GL_Convert565To555le(SDL_Surface *surface);

static void GEM_GL_Convert565le(SDL_Surface *surface);

static void GEM_GL_ConvertBGRAToABGR(SDL_Surface *surface);

static void (*GEM_GL_Convert)(SDL_Surface *surface);

#endif

/* GEM driver bootstrap functions */

static int GEM_Available(void)

{

/* Test if AES available */

return 0;

appl_exit();

return 1;

}

static void GEM_DeleteDevice(SDL_VideoDevice *device)

{

free(device->hidden);

free(device);

}

static SDL_VideoDevice *GEM_CreateDevice(int devindex)

{

SDL_VideoDevice *device;

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

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

if ( device ) {

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

device->hidden = (struct SDL_PrivateVideoData *)

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

}

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

SDL_OutOfMemory();

if ( device ) {

free(device);

}

return(0);

}

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

/* 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->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->CheckMouseMode = GEM_CheckMouseMode;

#ifdef HAVE_OPENGL

/* OpenGL functions */

device->GL_LoadLibrary = GEM_GL_LoadLibrary;

device->GL_GetProcAddress = GEM_GL_GetProcAddress;

device->GL_GetAttribute = GEM_GL_GetAttribute;

device->GL_MakeCurrent = GEM_GL_MakeCurrent;

device->GL_SwapBuffers = GEM_GL_SwapBuffers;

#endif

/* Joystick + Mouse relative motion */

SDL_AtariXbios_InstallVectors(ATARI_XBIOS_MOUSEEVENTS|ATARI_XBIOS_JOYSTICKEVENTS);

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++) {

}

}

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;

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

/* Open AES (Application Environment Services) */

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;

#ifdef DEBUG_VIDEO_GEM

printf("sdl:video:gem: AES %02x.%02x\n", (GEM_version>>8) & 0xff, GEM_version & 0xff);

#endif

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

#ifdef DEBUG_VIDEO_GEM

printf("sdl:video:gem: appl_getinfo() returned 0x%04x\n", errorcode);

#endif

if (errorcode==0) {

#ifdef DEBUG_VIDEO_GEM

printf("sdl:video:gem: AES wind_*() modes: 0x%04x\n", GEM_wfeatures);

printf("sdl:video:gem: AES window behaviours: 0x%04x\n", ap_gout[3]);

} else {

printf("sdl:video:gem: apgout[]={0x%04x,0x%04x,0x%04x,0x%04x}\n",

ap_gout[0], ap_gout[1], ap_gout[1], ap_gout[3]

);

#endif

}

}

/* 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];

}

/* 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;

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;

/* Update hardware info */

this->info.hw_available = 0;

this->info.video_mem = 0;

/* 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);

/* 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);

/* Fill video modes list */

SDL_modelist[0] = 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;

#ifdef DEBUG_VIDEO_GEM

printf("sdl:video:gem: VideoInit(): done\n");

#endif

#ifdef HAVE_OPENGL

this->gl_config.driver_loaded = 1;

#endif

/* We're done! */

return(0);

}

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

{

return ((SDL_Rect **)NULL);

}

if (flags & SDL_FULLSCREEN) {

return (SDL_modelist);

}

return((SDL_Rect **)-1);

}

static void GEM_FreeBuffers(_THIS)

{

#ifdef HAVE_OPENGL

/* Shutdown OpenGL context */

if (GEM_ctx) {

OSMesaDestroyContext(GEM_ctx);

GEM_ctx = NULL;

}

#endif

if ( GEM_buffer2 ) {

free( GEM_buffer2 );

GEM_buffer2=NULL;

}

if ( GEM_buffer1 ) {

free( GEM_buffer1 );

GEM_buffer1=NULL;

}

}

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);

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);

v_show_c(VDI_handle, 1);

}

static void GEM_LockScreen(_THIS)

{

if (!GEM_locked) {

/* Lock AES */

wind_update(BEG_UPDATE);

wind_update(BEG_MCTRL);

/* Reserve memory space, used to be sure of compatibility */

form_dial( FMD_START, 0,0,0,0, 0,0,VDI_w,VDI_h);

GEM_locked=SDL_TRUE;

}

}

static void GEM_UnlockScreen(_THIS)

{

if (GEM_locked) {

/* Restore screen memory, and send REDRAW to all apps */

form_dial( FMD_FINISH, 0,0,0,0, 0,0,VDI_w,VDI_h);

/* Unlock AES */

wind_update(END_MCTRL);

wind_update(END_UPDATE);

GEM_locked=SDL_FALSE;

}

}

SDL_Surface *GEM_SetVideoMode(_THIS, SDL_Surface *current,

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

{

int maxwidth, maxheight;

Uint32 modeflags, screensize;

/*--- Verify if asked mode can be used ---*/

if (flags & SDL_FULLSCREEN) {

maxwidth=VDI_w;

maxheight=VDI_h;

} else {

/* Windowed mode */

maxwidth=GEM_desk_w;

maxheight=GEM_desk_h;

}

width = (width | 15) +1;

}

if ((maxwidth < width) || (maxheight < height) || (VDI_bpp != bpp)) {

SDL_SetError("Couldn't find requested mode in list");

return(NULL);

}

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

if ( ! SDL_ReallocFormat(current, VDI_bpp, VDI_redmask, VDI_greenmask, VDI_bluemask, VDI_alphamask) ) {

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

return(NULL);

}

screensize = width * height * VDI_pixelsize;

#ifdef DEBUG_VIDEO_GEM

printf("sdl:video:gem: setvideomode(): %dx%dx%d = %d\n", width, height, bpp, screensize);

#endif

GEM_FreeBuffers(this);

GEM_bufops=0;

use_shadow1=use_shadow2=SDL_FALSE;

if (VDI_screen && (flags & SDL_FULLSCREEN)) {

if (VDI_format==VDI_FORMAT_INTER) {

use_shadow1=SDL_TRUE;

GEM_bufops = B2S_C2P_1TOS;

}

} else {

use_shadow1=SDL_TRUE;

if (VDI_format==VDI_FORMAT_PACK) {

GEM_bufops = B2S_VROCPYFM_1TOS;

} else {

use_shadow2=SDL_TRUE;

GEM_bufops = B2S_C2P_1TO2|B2S_VROCPYFM_2TOS;

}

}

if (use_shadow1) {

GEM_buffer1 = Atari_SysMalloc(screensize, MX_PREFTTRAM);

if (GEM_buffer1==NULL) {

return NULL;

}

memset(GEM_buffer1, 0, screensize);

#ifdef DEBUG_VIDEO_GEM

printf("sdl:video:gem: setvideomode(): allocated buffer 1\n");

#endif

}

if (use_shadow2) {

GEM_buffer2 = Atari_SysMalloc(screensize, MX_PREFTTRAM);

if (GEM_buffer2==NULL) {

return NULL;

}

memset(GEM_buffer2, 0, screensize);

#ifdef DEBUG_VIDEO_GEM

printf("sdl:video:gem: setvideomode(): allocated buffer 2\n");

#endif

}

/*--- Initialize screen ---*/

modeflags = 0;

if (VDI_bpp == 8) {

modeflags |= SDL_HWPALETTE;

}

modeflags |= SDL_FULLSCREEN;

modeflags |= SDL_HWSURFACE;

} else {

modeflags |= SDL_SWSURFACE;

}

GEM_fullscreen = SDL_TRUE;

short x2,y2,w2,h2;

if (!(flags & SDL_NOFRAME)) {

GEM_win_type=NAME|MOVER|CLOSER|SMALLER;

if (flags & SDL_RESIZABLE) {

GEM_win_type |= FULLER|SIZER;

modeflags |= SDL_RESIZABLE;

}

} else {

GEM_win_type=0;

modeflags |= SDL_NOFRAME;

}

/* Calculate window size */

if (!wind_calc(WC_BORDER, GEM_win_type, 0,0,width,height, &x2,&y2,&w2,&h2)) {

GEM_FreeBuffers(this);

SDL_SetError("Can not calculate window attributes");

return NULL;

}

/* Center window */

x2 = GEM_desk_x+((GEM_desk_w-w2)>>1);

y2 = GEM_desk_y+((GEM_desk_h-h2)>>1);

/* Destroy existing window */

if (GEM_handle >= 0) {

wind_close(GEM_handle);

wind_delete(GEM_handle);

}

/* Create window */

GEM_handle=wind_create(GEM_win_type, x2,y2,w2,h2);

if (GEM_handle<0) {

GEM_FreeBuffers(this);

SDL_SetError("Can not create window");

return NULL;

}

#endif

/* Setup window name */

wind_set(GEM_handle,WF_NAME,(short)(((unsigned long)GEM_title_name)>>16),(short)(((unsigned long)GEM_title_name) & 0xffff),0,0);

GEM_refresh_name = SDL_FALSE;

/* Open the window */

wind_open(GEM_handle,x2,y2,w2,h2);

GEM_fullscreen = SDL_FALSE;

}

/* Set up the new mode framebuffer */

current->w = width;

current->h = height;

if (use_shadow1) {

current->pixels = GEM_buffer1;

} else {

current->pixels = VDI_screen;

current->pixels += VDI_pitch * ((VDI_h - height) >> 1);

current->pixels += VDI_pixelsize * ((VDI_w - width) >> 1);

current->pitch = VDI_pitch;

}

#ifdef HAVE_OPENGL

if (flags & SDL_OPENGL) {

/* Init OpenGL context using OSMesa */

switch (VDI_bpp) {

case 15:

if (VDI_redmask == 31<<10) {

GEM_GL_Convert = GEM_GL_Convert565To555be;

} else {

GEM_GL_Convert = GEM_GL_Convert565To555le;

}

break;

case 16:

if (VDI_redmask == 31<<11) {

format = OSMESA_RGB_565;

} else {

/* 565, little endian, unsupported */

format = OSMESA_RGB_565;

GEM_GL_Convert = GEM_GL_Convert565le;

}

break;

case 24:

if (VDI_redmask == 255<<16) {

format = OSMESA_RGB;

} else {

format = OSMESA_BGR;

}

break;

case 32:

if (VDI_redmask == 255<<16) {

format = OSMESA_ARGB;

} else if (VDI_redmask == 255<<8) {

format = OSMESA_BGRA;

} else if (VDI_redmask == 255<<24) {

format = OSMESA_RGBA;

} else {

/* ABGR format unsupported */

format = OSMESA_BGRA;

}

break;

}

GEM_ctx = OSMesaCreateContextExt( format, this->gl_config.depth_size,

this->gl_config.stencil_size, this->gl_config.accum_red_size +

this->gl_config.accum_green_size + this->gl_config.accum_blue_size +

this->gl_config.accum_alpha_size, NULL );

if (!GEM_ctx) {

GEM_FreeBuffers(this);

SDL_SetError("OSMesaCreateContext failed");

return(NULL);

}

modeflags |= SDL_OPENGL;

}

#endif

current->flags = modeflags;

#ifdef DEBUG_VIDEO_GEM

printf("sdl:video:gem: surface: %dx%d\n", current->w, current->h);

#endif

/* We're done */

return(current);

}

static int GEM_AllocHWSurface(_THIS, SDL_Surface *surface)

{

return -1;

}

static void GEM_FreeHWSurface(_THIS, SDL_Surface *surface)

{

return;

}

static int GEM_LockHWSurface(_THIS, SDL_Surface *surface)

{

return(0);

}

static void GEM_UnlockHWSurface(_THIS, SDL_Surface *surface)

{

return;

}

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

{

SDL_Surface *surface;

surface = this->screen;

/* Need to be a multiple of 16 pixels */

surf_width=surface->w;

surf_width = (surf_width | 15) + 1;

}

if (GEM_bufops & (B2S_C2P_1TO2|B2S_C2P_1TOS)) {

void *destscr;

int destpitch;

if (GEM_bufops & B2S_C2P_1TOS) {

destscr = VDI_screen;

destscr += VDI_pitch * ((VDI_h - surface->h) >> 1);

destpitch = VDI_pitch;

} else {

destscr = GEM_buffer2;

destpitch = surface->pitch;

}

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

void *source,*destination;

int x1,x2;

x1 = rects[i].x & ~15;

x2 = rects[i].x+rects[i].w;

if (x2 & 15) {

x2 = (x2 | 15) +1;