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      1 // Copyright 2016 The SwiftShader Authors. All Rights Reserved.
      2 //
      3 // Licensed under the Apache License, Version 2.0 (the "License");
      4 // you may not use this file except in compliance with the License.
      5 // You may obtain a copy of the License at
      6 //
      7 //    http://www.apache.org/licenses/LICENSE-2.0
      8 //
      9 // Unless required by applicable law or agreed to in writing, software
     10 // distributed under the License is distributed on an "AS IS" BASIS,
     11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     12 // See the License for the specific language governing permissions and
     13 // limitations under the License.
     14 
     15 #ifndef libX11_hpp
     16 #define libX11_hpp
     17 
     18 #define Bool int
     19 #include <X11/Xlib.h>
     20 #include <X11/Xutil.h>
     21 #include <X11/extensions/XShm.h>
     22 
     23 struct LibX11exports
     24 {
     25 	LibX11exports(void *libX11, void *libXext);
     26 
     27 	Display *(*XOpenDisplay)(char *display_name);
     28 	Status (*XGetWindowAttributes)(Display *display, Window w, XWindowAttributes *window_attributes_return);
     29 	Screen *(*XDefaultScreenOfDisplay)(Display *display);
     30 	int (*XWidthOfScreen)(Screen *screen);
     31 	int (*XHeightOfScreen)(Screen *screen);
     32 	int (*XPlanesOfScreen)(Screen *screen);
     33 	GC (*XDefaultGC)(Display *display, int screen_number);
     34 	int (*XDefaultDepth)(Display *display, int screen_number);
     35 	Status (*XMatchVisualInfo)(Display *display, int screen, int depth, int screen_class, XVisualInfo *vinfo_return);
     36 	Visual *(*XDefaultVisual)(Display *display, int screen_number);
     37 	int (*(*XSetErrorHandler)(int (*handler)(Display*, XErrorEvent*)))(Display*, XErrorEvent*);
     38 	int (*XSync)(Display *display, Bool discard);
     39 	XImage *(*XCreateImage)(Display *display, Visual *visual, unsigned int depth, int format, int offset, char *data, unsigned int width, unsigned int height, int bitmap_pad, int bytes_per_line);
     40 	int (*XCloseDisplay)(Display *display);
     41 	int (*XPutImage)(Display *display, Drawable d, GC gc, XImage *image, int src_x, int src_y, int dest_x, int dest_y, unsigned int width, unsigned int height);
     42 
     43 	Bool (*XShmQueryExtension)(Display *display);
     44 	XImage *(*XShmCreateImage)(Display *display, Visual *visual, unsigned int depth, int format, char *data, XShmSegmentInfo *shminfo, unsigned int width, unsigned int height);
     45 	Bool (*XShmAttach)(Display *display, XShmSegmentInfo *shminfo);
     46 	Bool (*XShmDetach)(Display *display, XShmSegmentInfo *shminfo);
     47 	int (*XShmPutImage)(Display *display, Drawable d, GC gc, XImage *image, int src_x, int src_y, int dest_x, int dest_y, unsigned int width, unsigned int height, bool send_event);
     48 };
     49 
     50 #undef Bool
     51 
     52 class LibX11
     53 {
     54 public:
     55 	operator bool()
     56 	{
     57 		return loadExports();
     58 	}
     59 
     60 	LibX11exports *operator->();
     61 
     62 private:
     63 	LibX11exports *loadExports();
     64 };
     65 
     66 extern LibX11 libX11;
     67 
     68 #endif   // libX11_hpp
     69