/*    MiniGUI - A compact GUI support system for real-time embedded Linux.    Copyright (C) 2001 Wei Yongming    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    Wei Yongming    ymwei@minigui.org*//* Qt virtual FrameBuffer based video driver implementation.*/#include <stdlib.h>#include <stdio.h>#include <string.h>#include <fcntl.h>#include <unistd.h>#include <sys/ioctl.h>#include <sys/mman.h>#include <sys/types.h>#include <sys/ipc.h>#include <sys/shm.h>#include "common.h"#include "minigui.h"#include "misc.h"#include "newgal.h"#include "sysvideo.h"#include "qvfb.h"/* Initialization/Query functions */static int QVFB_VideoInit(_THIS, GAL_PixelFormat *vformat);static GAL_Rect **QVFB_ListModes(_THIS, GAL_PixelFormat *format, Uint32 flags);static GAL_Surface *QVFB_SetVideoMode(_THIS, GAL_Surface *current, int width, int height, int bpp, Uint32 flags);static int QVFB_SetColors(_THIS, int firstcolor, int ncolors, GAL_Color *colors);static void QVFB_VideoQuit(_THIS);/* Hardware surface functions */static int QVFB_AllocHWSurface(_THIS, GAL_Surface *surface);static void QVFB_FreeHWSurface(_THIS, GAL_Surface *surface);/* QVFB driver bootstrap functions */static int QVFB_Available (void){    char file [50];    int display;    key_t key;    int shmid;    if (GetMgEtcIntValue ("qvfb", "display", &display) < 0)        return 0;    sprintf (file, QT_VFB_MOUSE_PIPE, display);    key = ftok (file, 'b');    shmid = shmget (key, 0, 0);    return shmid != -1;}static void QVFB_DeleteDevice (GAL_VideoDevice *device){    free (device->hidden);    free (device);}static void QVFB_UpdateRects (_THIS, int numrects, GAL_Rect *rects){    int i;    RECT bound = this->hidden->hdr->update;    if (bound.right == -1) bound.right = 0;    if (bound.bottom == -1) bound.bottom = 0;    for (i = 0; i < numrects; i++) {        RECT rc;        SetRect (&rc, rects[i].x, rects[i].y,                         rects[i].x + rects[i].w, rects[i].y + rects[i].h);        GetBoundRect (&bound, &bound, &rc);    }    this->hidden->hdr->update = bound;    this->hidden->hdr->dirty = TRUE;}static GAL_VideoDevice *QVFB_CreateDevice (int devindex){    GAL_VideoDevice *this;    /* Initialize all variables that we clean on shutdown */    this = (GAL_VideoDevice *)malloc(sizeof(GAL_VideoDevice));    if (this) {        memset (this, 0, (sizeof *this));        this->hidden = (struct GAL_PrivateVideoData *) malloc ((sizeof *this->hidden));    }    if ((this == NULL) || (this->hidden == NULL)) {        GAL_OutOfMemory ();        if (this) free (this);        return (0);    }    memset (this->hidden, 0, (sizeof *this->hidden));    /* Set the function pointers */    this->VideoInit = QVFB_VideoInit;    this->ListModes = QVFB_ListModes;    this->SetVideoMode = QVFB_SetVideoMode;    this->SetColors = QVFB_SetColors;    this->VideoQuit = QVFB_VideoQuit;    this->AllocHWSurface = QVFB_AllocHWSurface;    this->FreeHWSurface = QVFB_FreeHWSurface;    this->UpdateRects = QVFB_UpdateRects;    this->CheckHWBlit = NULL;    this->FillHWRect = NULL;    this->SetHWColorKey = NULL;    this->SetHWAlpha = NULL;    this->free = QVFB_DeleteDevice;    return this;}VideoBootStrap QVFB_bootstrap = {    "qvfb", "Qt Virtual FrameBuffer",    QVFB_Available, QVFB_CreateDevice};static int QVFB_VideoInit (_THIS, GAL_PixelFormat *vformat){    char file [50];    int display;    key_t key;    int shmid;    struct GAL_PrivateVideoData* data = this->hidden;    if (GetMgEtcIntValue ("qvfb", "display", &display) < 0)        return -1;    sprintf (file, QT_VFB_MOUSE_PIPE, display);    key = ftok (file, 'b');    shmid = shmget (key, 0, 0);    if (shmid != -1)        data->shmrgn = (unsigned char *)shmat (shmid, 0, 0);    if ((int)data->shmrgn == -1 || data->shmrgn == NULL) {        GAL_SetError ("Unable to attach to virtual FrameBuffer server.\n");        return -1;    }    data->hdr = (struct QVFbHeader *) data->shmrgn;    vformat->BitsPerPixel = data->hdr->depth;    switch (vformat->BitsPerPixel) {        case 8:            vformat->BytesPerPixel = 1;            data->hdr->numcols = 256;            break;        case 12:            vformat->BitsPerPixel = 16;            vformat->BytesPerPixel = 2;            vformat->Rmask = 0x00000F00;            vformat->Gmask = 0x000000F0;            vformat->Bmask = 0x0000000F;            break;        case 16:            vformat->BytesPerPixel = 2;            vformat->Rmask = 0x0000F800;            vformat->Gmask = 0x000007E0;            vformat->Bmask = 0x0000001F;            break;        case 32:            vformat->BytesPerPixel = 4;            vformat->Rmask = 0x00FF0000;            vformat->Gmask = 0x0000FF00;            vformat->Bmask = 0x000000FF;            break;        default:            GAL_SetError ("Not supported depth: %d.\n", vformat->BitsPerPixel);            return -1;    }    return 0;}static GAL_Rect **QVFB_ListModes (_THIS, GAL_PixelFormat *format, Uint32 flags){    return (GAL_Rect **) -1;}static GAL_Surface *QVFB_SetVideoMode (_THIS, GAL_Surface *current,                                int width, int height, int bpp, Uint32 flags){    /* Set up the mode framebuffer */    current->flags = GAL_HWSURFACE | GAL_FULLSCREEN;    current->w = this->hidden->hdr->width;    current->h = this->hidden->hdr->height;    current->pitch = this->hidden->hdr->linestep;    current->pixels = this->hidden->shmrgn + this->hidden->hdr->dataoffset;    /* We're done */    return current;}/* We don't actually allow hardware surfaces other than the main one */static int QVFB_AllocHWSurface(_THIS, GAL_Surface *surface){    return -1;}static void QVFB_FreeHWSurface(_THIS, GAL_Surface *surface){    surface->pixels = NULL;}static int QVFB_SetColors(_THIS, int firstcolor, int ncolors, GAL_Color *colors){    int i, pixel = firstcolor;    for (i = 0; i < ncolors; i++) {        this->hidden->hdr->clut [pixel]                 = (0xff << 24) | ((colors[i].r & 0xff) << 16) | ((colors[i].g & 0xff) << 8) | (colors[i].b & 0xff);        pixel ++;    }    return 0;}static void QVFB_VideoQuit (_THIS){    shmdt (this->hidden->shmrgn);}