X-Git-Url: https://git.sesse.net/?p=ccbs;a=blobdiff_plain;f=bigscreen%2Ftinyptc%2Fxshm.c;fp=bigscreen%2Ftinyptc%2Fxshm.c;h=db3895180b7f2bb05d29b3f2fdc02c5e4d8363f8;hp=0000000000000000000000000000000000000000;hb=140a0aae7299d15459fe9ec74ad5020887e0a960;hpb=fd56777b1051147ba14850b72f1f959cd82a1827 diff --git a/bigscreen/tinyptc/xshm.c b/bigscreen/tinyptc/xshm.c new file mode 100644 index 0000000..db38951 --- /dev/null +++ b/bigscreen/tinyptc/xshm.c @@ -0,0 +1,308 @@ +/* + * TinyPTC x11 v0.7.3 X Shared Memory Extension target + * Copyright (C) 2000-2002 Alessandro Gatti + * + * http://www.sourceforge.net/projects/tinyptc/ + * + * 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 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +/* #includes */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "tinyptc.h" + +#ifdef __PTC_XSHM__ + +#define __PTC_FROM_SOURCE + +#include "xshm.h" + +/* Open the screen */ + +int +ptc_open (char *title, int width, int height) +{ + /* Open a display on the current root window */ + ptc_display = XOpenDisplay (NULL); + if (ptc_display == NULL) + { + return PTC_FAILURE; + } + /* Get the default screen associated with the previously opened display */ + ptc_screen = DefaultScreen (ptc_display); + /* Get the default visual */ + ptc_visual = DefaultVisual (ptc_display, ptc_screen); + /* Get screen bitdepth */ + ptc_depth = DefaultDepth (ptc_display, ptc_screen); + /* Get a pointer to the supported pixmap formats */ + ptc_pixmap_formats = + XListPixmapFormats (ptc_display, &ptc_pixmap_format_count); + /* Check if there's one that's suitable */ + for (ptc_pixmap_counter = 0; ptc_pixmap_counter < ptc_pixmap_format_count; + ptc_pixmap_counter++) + { + if (ptc_depth == ptc_pixmap_formats[ptc_pixmap_counter].depth) + { + /* Set the right value */ + ptc_converter_depth = + ptc_pixmap_formats[ptc_pixmap_counter].bits_per_pixel; + } + } + XFree (ptc_pixmap_formats); +#ifdef __PTC_ENABLE_CONVERSIONS__ + /* Check if a converter is avaliable */ + ptc_convert = + ptc_request_converter (ptc_converter_depth, ptc_visual->red_mask, + ptc_visual->green_mask, ptc_visual->blue_mask); + if (!ptc_convert) + { + /* Close the display */ + XCloseDisplay (ptc_display); + return 0; + } + /* Get the actual bytes-per-pixel value */ + switch (ptc_converter_depth) + { + case 8: + ptc_output_pitch = 1; + break; + case 15: + ptc_output_pitch = 2; + break; + case 16: + ptc_output_pitch = 2; + break; + case 24: + ptc_output_pitch = 3; + break; + case 32: + ptc_output_pitch = 4; + break; + } + /* Allocate the temporary buffer */ + ptc_buffer = (char *) malloc (width * height * ptc_output_pitch); + if (ptc_buffer == NULL) + { + XCloseDisplay (ptc_display); + return PTC_FAILURE; + } +#else + /* It runs only on a 32bpp display if no conversions were activated */ + if (ptc_converter_depth != 32) + { + XCloseDisplay (ptc_display); + return PTC_FAILURE; + } +#endif /* __PTC_ENABLE_CONVERSIONS__ */ + /* Check for XShm extension */ + if (!XShmQueryExtension (ptc_display)) + { + XCloseDisplay (ptc_display); + return PTC_FAILURE; + } + /* Get screen dimensions */ + ptc_screen_width = DisplayWidth (ptc_display, ptc_screen); + ptc_screen_height = DisplayHeight (ptc_display, ptc_screen); + /* Get the default root window */ + ptc_root_window = DefaultRootWindow (ptc_display); + /* Initialize window's attribute structure */ + ptc_window_attributes.border_pixel = BlackPixel (ptc_display, ptc_screen); + ptc_window_attributes.background_pixel = + BlackPixel (ptc_display, ptc_screen); + ptc_window_attributes.backing_store = NotUseful; +#ifdef __PTC_CENTER_WINDOW__ + /* Center the window on the screen */ + ptc_x_position = (ptc_screen_width - width) / 2; + ptc_y_position = (ptc_screen_height - height) / 2; +#else + /* Dock the window on the top-left corner */ + ptc_x_position = 0; + ptc_y_position = 0; +#endif /* __PTC_CENTER_WINDOW__ */ + /* Create the window */ + ptc_window = + XCreateWindow (ptc_display, ptc_root_window, ptc_x_position, + ptc_y_position, width, height, 0, ptc_depth, InputOutput, + ptc_visual, CWBackPixel | CWBorderPixel | CWBackingStore, + &ptc_window_attributes); + /* Set the window's name */ + XStoreName (ptc_display, ptc_window, title); + /* Tell the server to report only keypress-related events */ + XSelectInput (ptc_display, ptc_window, KeyPressMask | KeyReleaseMask); + /* Initialize window's sizehint definition structure */ + ptc_window_sizehints.flags = PPosition | PMinSize | PMaxSize; + ptc_window_sizehints.x = 0; + ptc_window_sizehints.y = 0; + ptc_window_sizehints.min_width = width; + ptc_window_sizehints.max_width = width; + ptc_window_sizehints.min_height = height; + ptc_window_sizehints.max_height = height; + /* Set the window's sizehint */ + XSetWMNormalHints (ptc_display, ptc_window, &ptc_window_sizehints); + /* Clear the window */ + XClearWindow (ptc_display, ptc_window); + /* Put the window on top of the others */ + XMapRaised (ptc_display, ptc_window); + /* Clear event queue */ + XFlush (ptc_display); + /* Get the default graphic context */ + ptc_window_gc = DefaultGC (ptc_display, ptc_screen); + /* Create an XShmImage */ + ptc_ximage = + XShmCreateImage (ptc_display, ptc_visual, ptc_depth, ZPixmap, 0, + &ptc_shm_segment, width, height); + /* Get a shared segment */ + ptc_shm_segment.shmid = + shmget (IPC_PRIVATE, ptc_ximage->bytes_per_line * ptc_ximage->height, + IPC_CREAT | 0777); + /* Initialize XShmImage data buffer pointer */ + ptc_ximage->data = (char *)shmat (ptc_shm_segment.shmid, 0, 0); + /* Save buffer address */ + ptc_shm_segment.shmaddr = ptc_ximage->data; + /* Put the segment in read/write */ + ptc_shm_segment.readOnly = False; + /* Attach the segment to the display */ + if (!XShmAttach (ptc_display, &ptc_shm_segment)) + { + /* Destroy the image */ + XDestroyImage (ptc_ximage); + /* Detach the buffer from the segment */ + shmdt (ptc_shm_segment.shmaddr); + /* Remove the segment */ + shmctl (ptc_shm_segment.shmid, IPC_RMID, 0); + /* Destroy the window */ + XDestroyWindow (ptc_display, ptc_window); + /* Close the display */ + XCloseDisplay (ptc_display); + return PTC_FAILURE; + } + /* Save windowsize values */ + ptc_viewport_width = width; + ptc_viewport_height = height; + return PTC_SUCCESS; +} + +/* Update the screen */ + +int +ptc_update (void *buffer) +{ + char *ptc_buffer; + + ptc_buffer=(char *)buffer; + /* Copy buffer data into the XShmImage */ +#ifdef __PTC_ENABLE_CONVERSIONS__ + ptc_source_index = 0; + ptc_destination_index = 0; + /* Convert the image line by line */ + for (ptc_blitcounter = 0; ptc_blitcounter < ptc_viewport_height; + ptc_blitcounter++) + { + /* Conversion */ + ptc_convert (ptc_buffer + ptc_source_index, + (ptc_ximage->data) + ptc_destination_index, + ptc_viewport_width); + /* Pointers update */ + ptc_source_index += ptc_viewport_width * sizeof (int); + ptc_destination_index += ptc_viewport_width * ptc_output_pitch; + } +#else + /* Blit the image */ + memcpy (ptc_ximage->data, buffer, + ptc_viewport_width * ptc_viewport_height * sizeof (int)); +#endif /* __PTC_ENABLE_CONVERSIONS__ */ + /* Synchronize the event queue */ + XSync (ptc_display, 0); + /* Put the buffer on the window */ + XShmPutImage (ptc_display, ptc_window, ptc_window_gc, ptc_ximage, 0, 0, 0, + 0, ptc_viewport_width, ptc_viewport_height, False); + /* Process incoming events */ + if (ptc_process_events ()) + { +#ifdef __PTC_CLEANUP_CALLBACK__ + ptc_cleanup_callback (); +#endif /* __PTC_CLEANUP_CALLBACK__ */ + ptc_close (); + exit (0); + } + return PTC_SUCCESS; +} + +/* Process events */ + +int +ptc_process_events (void) +{ + XEvent ptc_xevent; + KeySym ptc_keysym; + /* Check if there are events waiting in the display's queue */ + if (XPending (ptc_display)) + { + /* Get the next event in queue */ + XNextEvent (ptc_display, &ptc_xevent); + /* Check if it's a keypress event */ + if (ptc_xevent.type == KeyPress) + { + /* Get the keysym */ + ptc_keysym = XLookupKeysym (&ptc_xevent.xkey, 0); + /* Check if the key pressed was a function one */ + if ((ptc_keysym >> 8) == __PTC_FUNCTION_KEY__) + { + /* Check if it was the escape key */ + if ((ptc_keysym & 0xFF) == __PTC_ESCAPE_KEY__) + { + return PTC_SUCCESS; + } + } + } + } + return PTC_FAILURE; +} + +/* Close the screen */ + +void +ptc_close (void) +{ + /* Detach the segment from the display */ + XShmDetach (ptc_display, &ptc_shm_segment); + /* Destroy the XShmImage */ + XDestroyImage (ptc_ximage); + /* Detach the buffer from the segment */ + shmdt (ptc_shm_segment.shmaddr); + /* Remove the segment */ + shmctl (ptc_shm_segment.shmid, IPC_RMID, 0); + /* Close the window */ + XDestroyWindow (ptc_display, ptc_window); + /* Close the display */ + XCloseDisplay (ptc_display); + /* Deallocate the buffer */ + if (ptc_buffer) + { + free (ptc_buffer); + } +} + +#endif /* __PTC_XSHM__ */