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nuttx-bb/nuttx/arch/sim/src/up_x11framebuffer.c

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/****************************************************************************
* arch/sim/src/up_x11framebuffer.c
*
* Copyright (C) 2008 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#define CONFIG_SIM_X11NOSHM 1
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <sys/ipc.h>
#ifndef CONFIG_SIM_X11NOSHM
# include <sys/shm.h>
# include <X11/extensions/XShm.h>
#endif
/****************************************************************************
* Definitions
****************************************************************************/
/****************************************************************************
* Private Type Declarations
***************************************************************************/
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/****************************************************************************
* Public Variables
****************************************************************************/
/* Also used in up_x11eventloop */
Display *g_display;
int g_x11initialized;
/****************************************************************************
* Private Variables
****************************************************************************/
static int g_screen;
static Window g_window;
static GC g_gc;
#ifndef CONFIG_SIM_X11NOSHM
static XShmSegmentInfo g_xshminfo;
static int g_xerror;
#endif
static XImage *g_image;
static unsigned char *g_framebuffer;
static unsigned short g_fbpixelwidth;
static unsigned short g_fbpixelheight;
static int g_shmcheckpoint = 0;
static int b_useshm;
/****************************************************************************
* Name: up_x11createframe
***************************************************************************/
static inline int up_x11createframe(void)
{
XGCValues gcval;
char *argv[2] = { "nuttx", NULL };
char *winName = "NuttX";
char *iconName = "NX";
XTextProperty winprop;
XTextProperty iconprop;
XSizeHints hints;
g_display = XOpenDisplay(NULL);
if (g_display == NULL)
{
printf("Unable to open display.\n");
return -1;
}
g_screen = DefaultScreen(g_display);
g_window = XCreateSimpleWindow(g_display, DefaultRootWindow(g_display),
0, 0, g_fbpixelwidth, g_fbpixelheight, 2,
BlackPixel(g_display, g_screen),
BlackPixel(g_display, g_screen));
XStringListToTextProperty(&winName, 1, &winprop);
XStringListToTextProperty(&iconName, 1, &iconprop);
hints.flags = PSize | PMinSize | PMaxSize;
hints.width = hints.min_width = hints.max_width = g_fbpixelwidth;
hints.height= hints.min_height = hints.max_height = g_fbpixelheight;
XSetWMProperties(g_display, g_window, &winprop, &iconprop, argv, 1,
&hints, NULL, NULL);
XMapWindow(g_display, g_window);
/* Select window input events */
XSelectInput(g_display, g_window,
ButtonPressMask|ButtonReleaseMask|ButtonMotionMask|KeyPressMask);
/* Release queued events on the display */
#ifdef CONFIG_SIM_TOUCHSCREEN
(void)XAllowEvents(g_display, AsyncBoth, CurrentTime);
/* Grab mouse button 1, enabling mouse-related events */
(void)XGrabButton(g_display, Button1, AnyModifier, g_window, 1,
ButtonPressMask|ButtonReleaseMask|ButtonMotionMask,
GrabModeAsync, GrabModeAsync, None, None);
#endif
gcval.graphics_exposures = 0;
g_gc = XCreateGC(g_display, g_window, GCGraphicsExposures, &gcval);
return 0;
}
/****************************************************************************
* Name: up_x11errorhandler
***************************************************************************/
#ifndef CONFIG_SIM_X11NOSHM
static int up_x11errorhandler(Display *display, XErrorEvent *event)
{
g_xerror = 1;
return 0;
}
#endif
/****************************************************************************
* Name: up_x11traperrors
***************************************************************************/
#ifndef CONFIG_SIM_X11NOSHM
static void up_x11traperrors(void)
{
g_xerror = 0;
XSetErrorHandler(up_x11errorhandler);
}
#endif
/****************************************************************************
* Name: up_x11untraperrors
***************************************************************************/
#ifndef CONFIG_SIM_X11NOSHM
static int up_x11untraperrors(void)
{
XSync(g_display,0);
XSetErrorHandler(NULL);
return g_xerror;
}
#endif
/****************************************************************************
* Name: up_x11uninitX
***************************************************************************/
static void up_x11uninitX(void)
{
fprintf(stderr, "Uninitalizing X\n");
if (g_x11initialized)
{
#ifndef CONFIG_SIM_X11NOSHM
if (g_shmcheckpoint > 4)
{
XShmDetach(g_display, &g_xshminfo);
}
if (g_shmcheckpoint > 3)
{
shmdt(g_xshminfo.shmaddr);
}
if (g_shmcheckpoint > 2)
{
shmctl(g_xshminfo.shmid, IPC_RMID, 0);
}
#endif
if (g_shmcheckpoint > 1)
{
XDestroyImage(g_image);
}
/* Un-grab the mouse buttons */
#ifdef CONFIG_SIM_TOUCHSCREEN
XUngrabButton(g_display, Button1, AnyModifier, g_window);
#endif
g_x11initialized = 0;
}
XCloseDisplay(g_display);
}
/****************************************************************************
* Name: up_x11uninitialize
***************************************************************************/
#ifndef CONFIG_SIM_X11NOSHM
static void up_x11uninitialize(void)
{
fprintf(stderr, "Uninitalizing\n");
if (g_shmcheckpoint > 1)
{
if (!b_useshm && g_framebuffer)
{
free(g_framebuffer);
g_framebuffer = 0;
}
}
if (g_shmcheckpoint > 0)
{
g_shmcheckpoint = 1;
}
}
#endif
/****************************************************************************
* Name: up_x11mapsharedmem
***************************************************************************/
static inline int up_x11mapsharedmem(int depth, unsigned int fblen)
{
#ifndef CONFIG_SIM_X11NOSHM
Status result;
#endif
atexit(up_x11uninitX);
g_shmcheckpoint = 1;
b_useshm = 0;
#ifndef CONFIG_SIM_X11NOSHM
if (XShmQueryExtension(g_display))
{
b_useshm = 1;
printf("Using shared memory.\n");
up_x11traperrors();
g_image = XShmCreateImage(g_display, DefaultVisual(g_display, g_screen),
depth, ZPixmap, NULL, &g_xshminfo,
g_fbpixelwidth, g_fbpixelheight);
if (up_x11untraperrors())
{
up_x11uninitialize();
goto shmerror;
}
if (!g_image)
{
fprintf(stderr,"Unable to create g_image.");
return -1;
}
g_shmcheckpoint++;
g_xshminfo.shmid = shmget(IPC_PRIVATE,
g_image->bytes_per_line * g_image->height,
IPC_CREAT | 0777);
if (g_xshminfo.shmid < 0)
{
up_x11uninitialize();
goto shmerror;
}
g_shmcheckpoint++;
g_image->data = (char *) shmat(g_xshminfo.shmid, 0, 0);
if (g_image->data == ((char *) -1))
{
up_x11uninitialize();
goto shmerror;
}
g_shmcheckpoint++;
g_xshminfo.shmaddr = g_image->data;
g_xshminfo.readOnly = 0;
up_x11traperrors();
result = XShmAttach(g_display, &g_xshminfo);
if (up_x11untraperrors() || !result)
{
up_x11uninitialize();
goto shmerror;
}
g_shmcheckpoint++;
}
else
#endif
if (!b_useshm)
{
#ifndef CONFIG_SIM_X11NOSHM
shmerror:
#endif
b_useshm = 0;
g_framebuffer = (unsigned char*)malloc(fblen);
g_image = XCreateImage(g_display, DefaultVisual(g_display,g_screen), depth,
ZPixmap, 0, (char*)g_framebuffer, g_fbpixelwidth, g_fbpixelheight,
8, 0);
if (g_image == NULL)
{
fprintf(stderr, "Unable to create g_image\n");
return -1;
}
g_shmcheckpoint++;
}
return 0;
}
/****************************************************************************
* Public Functions
***************************************************************************/
/****************************************************************************
* Name: up_x11initialize
*
* Description:
* Make an X11 window look like a frame buffer.
*
***************************************************************************/
int up_x11initialize(unsigned short width, unsigned short height,
void **fbmem, unsigned int *fblen, unsigned char *bpp,
unsigned short *stride)
{
XWindowAttributes windowAttributes;
int depth;
int ret;
/* Check if we are already initialized */
if (!g_x11initialized)
{
/* Save inputs */
g_fbpixelwidth = width;
g_fbpixelheight = height;
/* Create the X11 window */
ret = up_x11createframe();
if (ret < 0)
{
return ret;
}
/* Determine the supported pixel bpp of the current window */
XGetWindowAttributes(g_display, DefaultRootWindow(g_display), &windowAttributes);
/* Get the pixel depth. If the depth is 24-bits, use 32 because X expects
* 32-bit aligment anyway.
*/
depth = windowAttributes.depth;
if (depth == 24)
{
depth = 32;
}
printf("Pixel bpp is %d bits (using %d)\n", windowAttributes.depth, depth);
*bpp = depth;
*stride = (depth * width / 8);
*fblen = (*stride * height);
/* Map the window to shared memory */
up_x11mapsharedmem(windowAttributes.depth, *fblen);
g_x11initialized = 1;
}
*fbmem = (void*)g_framebuffer;
return 0;
}
/****************************************************************************
* Name: up_x11cmap
***************************************************************************/
int up_x11cmap(unsigned short first, unsigned short len,
unsigned char *red, unsigned char *green,
unsigned char *blue, unsigned char *transp)
{
Colormap cMap;
int ndx;
printf("Creating Colormap\n");
/* Convert each color to X11 scaling */
cMap = DefaultColormap(g_display, g_screen);
for (ndx = first; ndx < first + len; ndx++)
{
XColor color;
/* Convert to RGB. In the NuttX cmap, each component
* ranges from 0-255; for X11 the range is 0-65536 */
color.red = (short)(*red++) << 8;
color.green = (short)(*green++) << 8;
color.blue = (short)(*blue++) << 8;
color.flags = DoRed | DoGreen | DoBlue;
/* Then allocate a color for this selection */
if (!XAllocColor(g_display, cMap, &color))
{
fprintf(stderr, "Failed to allocate color%d\n", ndx);
return -1;
}
}
return 0;
}
/****************************************************************************
* Name: up_x11update
***************************************************************************/
void up_x11update(void)
{
#ifndef CONFIG_SIM_X11NOSHM
if (b_useshm)
{
XShmPutImage(g_display, g_window, g_gc, g_image, 0, 0, 0, 0,
g_fbpixelwidth, g_fbpixelheight, 0);
}
else
#endif
{
XPutImage(g_display, g_window, g_gc, g_image, 0, 0, 0, 0,
g_fbpixelwidth, g_fbpixelheight);
}
XSync(g_display, 0);
}
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