[repo.or.cz] gfxprim.git branch master updated: de77d6cd49f5ec5cb956161d1599c08fda673561 - Gfxprim

3 May 2012

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http://repo.or.cz/w/gfxprim.git/commit/de77d6cd49f5ec5cb956161d1599c08fda673...
commit de77d6cd49f5ec5cb956161d1599c08fda673561
Author: Cyril Hrubis metan@ucw.cz
Date:   Thu May 3 00:24:48 2012 +0200
backends: Initial Xlib backend, not yet fully working.
What is missing:
* Input driver
    * Pixel type detection
    * SHM Support
    * Reasonable Expose event handling

diff --git a/configure b/configure
index fe0350a..6011867 100755
--- a/configure
+++ b/configure
@@ -187,10 +187,13 @@ if __name__ ==  '__main__':
                    ["giflib",
    	    "Library to handle, display and manipulate GIF images",
    	    [header_exists, "gif_lib.h"], "", "-lgif"],
+                   ["libX11",
+		    "X11 library",
+		    [header_exists, "X11/Xlib.h"], "", "-lX11"],
    	   ["freetype",
                     "A high-quality and portable font engine",
                     [header_exists, "ft2build.h"], "", "`freetype-config --libs`"]], cfg)
-    
+
     parser = OptionParser();
# Enable disable libraries for linking
diff --git a/include/backends/GP_Backends.h b/include/backends/GP_Backends.h
index 0cd74f6..d9420e1 100644
--- a/include/backends/GP_Backends.h
+++ b/include/backends/GP_Backends.h
@@ -39,6 +39,7 @@
  */
 #include "backends/GP_LinuxFB.h"
 #include "backends/GP_SDL.h"
+#include "backends/GP_X11.h"
/*
  * Simplified backend initalization.
diff --git a/include/backends/GP_Backends.h b/include/backends/GP_X11.h
similarity index 78%
copy from include/backends/GP_Backends.h
copy to include/backends/GP_X11.h
index 0cd74f6..198e252 100644
--- a/include/backends/GP_Backends.h
+++ b/include/backends/GP_X11.h
@@ -20,29 +20,21 @@
  *                                                                           *
  *****************************************************************************/
-/*
-
-  Catch all header for backends.
-
- */
-
-#ifndef BACKENDS_GP_BACKENDS_H
-#define BACKENDS_GP_BACKENDS_H
+#ifndef BACKENDS_GP_X11_H
+#define BACKENDS_GP_X11_H
-/*
- * Base backend definitions.
- */
-#include "backends/GP_Backend.h"
-
-/*
- * Backends.
- */
-#include "backends/GP_LinuxFB.h"
-#include "backends/GP_SDL.h"
+#include "GP_Backend.h"
/*
- * Simplified backend initalization.
+ * Initalize X11 backend.
+ *
+ * The display may be NULL default display. The coordinates are position and
+ * geometry for newly created window.
+ * 
+ * Upon failure NULL is returned.
  */
-#include "backends/GP_BackendInit.h"
+GP_Backend *GP_BackendX11Init(const char *display, int x, int y,
+                              unsigned int w, unsigned int h,
+			      const char *caption);
-#endif /* BACKENDS_GP_BACKENDS_H */
+#endif /* BACKENDS_GP_X11_H */
diff --git a/libs/backends/GP_BackendInit.c b/libs/backends/GP_BackendInit.c
index 48ff440..5f6a470 100644
--- a/libs/backends/GP_BackendInit.c
+++ b/libs/backends/GP_BackendInit.c
@@ -24,9 +24,8 @@
#include "core/GP_Debug.h"
-#include "backends/GP_LinuxFB.h"
-#include "backends/GP_SDL.h"
-#include "backends/GP_BackendInit.h"
+#include "GP_Backends.h"
+#include "GP_BackendInit.h"
static void backend_sdl_help(FILE *help, const char *err)
 {
@@ -125,21 +124,49 @@ static GP_Backend *backend_fb_init(char *params, const char *caption,
    return GP_BackendLinuxFBInit(fb);
 }
+static void backend_x11_help(FILE *help, const char *err)
+{
+	if (help == NULL)
+		return;
+
+	if (err != NULL)
+		fprintf(help, "ERROR: %sn", err);
+
+	fprintf(help, "X11 backendn"
+	              "-----------n"
+	              "X11:WxHn");
+}
+
+static GP_Backend *backend_x11_init(char *params, const char *caption,
+                                    FILE *help)
+{
+	unsigned int w, h, n;
+
+	if (sscanf(params, "%u%*[xX]%u%n", &w, &h, &n) == 2 && n == strlen(params))
+		return GP_BackendX11Init(NULL, 0, 0, w, h, caption);
+
+	backend_x11_help(help, "X11: Invalid parameters");
+	return NULL;
+}
+
 static const char *backend_names[] = {
    "SDL", /* libSDL            */
    "FB",  /* Linux Framebuffer */
+	"X11", /* X11 window system */
    NULL,
 };
static GP_Backend *(*backend_inits[])(char *, const char *, FILE *) = {
    backend_sdl_init,
    backend_fb_init,
+	backend_x11_init,
    NULL,
 };
static void (*backend_helps[])(FILE *help, const char *err) = {
    backend_sdl_help,
    backend_fb_help,
+	backend_x11_help,
    NULL,
 };
diff --git a/libs/backends/GP_X11.c b/libs/backends/GP_X11.c
new file mode 100644
index 0000000..30bd65d
--- /dev/null
+++ b/libs/backends/GP_X11.c
@@ -0,0 +1,190 @@
+/*****************************************************************************
+ * This file is part of gfxprim library.                                     *
+ *                                                                           *
+ * Gfxprim 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 2.1 of the License, or (at your option) any later version.        *
+ *                                                                           *
+ * Gfxprim 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 gfxprim; if not, write to the Free Software            *
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor,                        *
+ * Boston, MA  02110-1301  USA                                               *
+ *                                                                           *
+ * Copyright (C) 2009-2012 Cyril Hrubis metan@ucw.cz                       *
+ *                                                                           *
+ *****************************************************************************/
+
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+
+#include "GP_X11.h"
+#include "core/GP_Debug.h"
+
+struct x11_priv {
+	Display *dpy;	
+	int scr;
+	Window win;
+	Visual *vis;
+	XImage *img;
+
+	GP_Context *context;
+};
+
+static void x11_exit(GP_Backend *self)
+{
+	struct x11_priv *x11 = GP_BACKEND_PRIV(self); 
+
+	x11->img->data = NULL;
+	XDestroyImage(x11->img);
+	XDestroyWindow(x11->dpy, x11->win);
+	XCloseDisplay(x11->dpy);
+
+	GP_ContextFree(x11->context);
+
+	free(self);
+}
+
+static void x11_flip(GP_Backend *self)
+{
+	struct x11_priv *x11 = GP_BACKEND_PRIV(self); 
+	unsigned int w = x11->context->w;
+	unsigned int h = x11->context->h;
+
+	GP_DEBUG(3, "Flipping context");
+
+	XLockDisplay(x11->dpy);
+
+	XPutImage(x11->dpy, x11->win, DefaultGC(x11->dpy, x11->scr),
+	          x11->img, 0, 0, 0, 0, w, h);
+	XFlush(x11->dpy);
+
+	XUnlockDisplay(x11->dpy);
+}
+
+static void x11_poll(GP_Backend *self)
+{
+	struct x11_priv *x11 = GP_BACKEND_PRIV(self); 
+	XEvent ev;
+
+	XLockDisplay(x11->dpy);
+	
+	while (XPending(x11->dpy)) {
+		XNextEvent(x11->dpy, &ev);
+
+		switch (ev.type) {
+		case Expose:
+			x11_flip(self);
+		break;
+		case MapNotify:
+			GP_DEBUG(1, "Shown");
+		break;
+		}
+	}
+	
+	XUnlockDisplay(x11->dpy);
+}
+
+GP_Backend *GP_BackendX11Init(const char *display, int x, int y,
+                              unsigned int w, unsigned int h,
+			      const char *caption)
+{
+	GP_Backend *backend;
+	struct x11_priv *x11;
+
+	GP_DEBUG(1, "Initalizing X11 display '%s'", display);
+
+	backend = malloc(sizeof(GP_Backend) +
+	                 sizeof(struct x11_priv));
+
+	if (backend == NULL)
+		return NULL;
+
+	x11 = GP_BACKEND_PRIV(backend);
+
+	x11->context = GP_ContextAlloc(w, h, GP_PIXEL_xRGB8888);
+
+	if (x11->context == NULL)
+		goto err0;
+	
+	//TODO: Error checking
+	XInitThreads();
+
+	x11->dpy = XOpenDisplay(display);
+
+	if (x11->dpy == NULL)
+		goto err1;
+
+	x11->scr = DefaultScreen(x11->dpy);
+	x11->vis = DefaultVisual(x11->dpy, x11->scr);
+	
+	GP_DEBUG(2, "Opening window '%s' %ix%i-%ux%u",
+	         caption, x, y, w, h);
+	
+	x11->img = XCreateImage(x11->dpy, x11->vis, 24, ZPixmap, 0, NULL,
+	                        w, h, 32, 0);
+
+	x11->img->data = (char*)x11->context->pixels;
+
+	x11->win = XCreateWindow(x11->dpy, DefaultRootWindow(x11->dpy),
+	                         x, y, w, h, 0, CopyFromParent,
+	                         InputOutput, CopyFromParent, 0, NULL);
+	
+	if (x11->win == None) {
+		//TODO: Error message?
+		GP_DEBUG(1, "Failed to create window");
+		goto err2;
+	}
+
+	/* Select events */
+	XSelectInput(x11->dpy, x11->win, StructureNotifyMask|ExposureMask);
+
+	/* Set window caption */
+	XmbSetWMProperties(x11->dpy, x11->win, caption, caption,
+	                   NULL, 0, NULL, NULL, NULL);
+	
+	/* Show window */
+	XMapWindow(x11->dpy, x11->win);
+	XFlush(x11->dpy);
+
+/*
+
+	enum GP_PixelType pixel_type;
+	pixel_type = GP_PixelRGBLookup(vscri.red.length,    vscri.red.offset,
+	                               vscri.green.length,  vscri.green.offset,
+	                               vscri.blue.length,   vscri.blue.offset,
+	                               vscri.transp.length, vscri.transp.offset,
+	                               vscri.bits_per_pixel);
+
+	if (pixel_type == GP_PIXEL_UNKNOWN) {
+		GP_DEBUG(1, "Unknown pixel typen");
+		goto err3;
+	}
+
+
+*/
+
+	backend->name       = "X11";
+	backend->context    = x11->context;
+	backend->Flip       = x11_flip;
+	backend->UpdateRect = NULL;
+	backend->Exit       = x11_exit;
+	backend->fd_list    = NULL;
+	backend->Poll       = x11_poll;
+
+	return backend;
+//err3:
+//	XDestroyWindow(x11->dpy, x11->win);
+err2:
+	XCloseDisplay(x11->dpy);
+err1:
+	GP_ContextFree(x11->context);
+err0:
+	free(backend);
+	return NULL;
+}
-----------------------------------------------------------------------
Summary of changes:
 configure                                   |    5 +-
 include/backends/GP_Backends.h              |    1 +
 include/backends/{GP_LinuxFB.h => GP_X11.h} |   21 ++--
 libs/backends/GP_BackendInit.c              |   33 ++++-
 libs/backends/GP_X11.c                      |  190 +++++++++++++++++++++++++++
 5 files changed, 235 insertions(+), 15 deletions(-)
 copy include/backends/{GP_LinuxFB.h => GP_X11.h} (79%)
 create mode 100644 libs/backends/GP_X11.c
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