Adds Cogl Hello World and "X11 foreign" example applications

This adds a simple standalone Cogl application that can be used to
smoke test a standalone build of Cogl without Clutter.

This also adds an x11-foreign app that shows how a toolkit can ask Cogl
to draw to an X Window that it owns instead of Cogl being responsible
for automatically creating and mapping an X Window for CoglOnscreen.
This commit is contained in:
Robert Bragg 2011-03-17 19:32:54 +00:00
parent 711d035f44
commit f5bb20212b
5 changed files with 216 additions and 1 deletions

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@ -1,7 +1,7 @@
SUBDIRS = cogl pango SUBDIRS = cogl pango
if COGL_STANDALONE_BUILD if COGL_STANDALONE_BUILD
SUBDIRS += po SUBDIRS += po examples
endif endif
ACLOCAL_AMFLAGS = -I build/autotools ${ACLOCAL_FLAGS} ACLOCAL_AMFLAGS = -I build/autotools ${ACLOCAL_FLAGS}

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@ -660,6 +660,7 @@ cogl/cogl-1.0.pc
cogl/cogl-$COGL_MAJOR_VERSION.0.pc:cogl/cogl.pc.in cogl/cogl-$COGL_MAJOR_VERSION.0.pc:cogl/cogl.pc.in
cogl/cogl-defines.h cogl/cogl-defines.h
pango/Makefile pango/Makefile
examples/Makefile
po/Makefile.in po/Makefile.in
) )

31
examples/Makefile.am Normal file
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@ -0,0 +1,31 @@
include $(top_srcdir)/build/autotools/Makefile.am.silent
INCLUDES = \
-I$(top_srcdir) \
-I$(top_srcdir)/clutter/cogl \
-I$(top_builddir)/clutter/cogl
AM_CFLAGS = \
$(COGL_DEP_CFLAGS) \
$(COGL_EXTRA_CFLAGS) \
-DCOGL_ENABLE_EXPERIMENTAL_2_0_API
AM_CPPFLAGS = \
-DG_DISABLE_SINGLE_INCLUDES \
-DCOGL_DISABLE_DEPRECATED
common_ldadd = \
$(top_builddir)/cogl/libcogl.la \
$(top_builddir)/pango/libcoglpango.la
noinst_PROGRAMS = hello
hello_SOURCES = hello.c
hello_LDADD = $(common_ldadd)
if X11_TESTS
noinst_PROGRAMS += x11-foreign
x11_foreign_SOURCES = x11-foreign.c
x11_foreign_LDADD = $(common_ldadd)
endif

47
examples/hello.c Normal file
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@ -0,0 +1,47 @@
#include <cogl/cogl.h>
#include <glib.h>
#include <stdio.h>
int
main (int argc, char **argv)
{
CoglContext *ctx;
CoglOnscreen *onscreen;
CoglFramebuffer *fb;
GError *error = NULL;
CoglVertexP2C4 triangle_vertices[] = {
{0, 0.7, 0xff, 0x00, 0x00, 0x80},
{-0.7, -0.7, 0x00, 0xff, 0x00, 0xff},
{0.7, -0.7, 0x00, 0x00, 0xff, 0xff}
};
CoglPrimitive *triangle;
ctx = cogl_context_new (NULL, &error);
if (!ctx) {
fprintf (stderr, "Failed to create context: %s\n", error->message);
return 1;
}
/* Eventually we want to get rid of any "default context" but for now it's
* needed... */
cogl_set_default_context (ctx);
onscreen = cogl_onscreen_new (ctx, 640, 480);
/* Eventually there will be an implicit allocate on first use so this
* will become optional... */
fb = COGL_FRAMEBUFFER (onscreen);
if (!cogl_framebuffer_allocate (fb, &error)) {
fprintf (stderr, "Failed to allocate framebuffer: %s\n", error->message);
return 1;
}
cogl_push_framebuffer (fb);
triangle = cogl_primitive_new_p2c4 (COGL_VERTICES_MODE_TRIANGLES,
3, triangle_vertices);
for (;;) {
cogl_primitive_draw (triangle);
cogl_framebuffer_swap_buffers (fb);
}
return 0;
}

136
examples/x11-foreign.c Normal file
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@ -0,0 +1,136 @@
#include <cogl/cogl.h>
#include <glib.h>
#include <stdio.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
int
main (int argc, char **argv)
{
Display *xdpy;
CoglRenderer *renderer;
CoglSwapChain *chain;
CoglOnscreenTemplate *onscreen_template;
CoglDisplay *display;
CoglContext *ctx;
CoglOnscreen *onscreen;
CoglFramebuffer *fb;
GError *error = NULL;
guint32 visual;
XVisualInfo template, *xvisinfo;
int visinfos_count;
XSetWindowAttributes xattr;
unsigned long mask;
Window xwin;
/* Since we want to test external ownership of the X display,
* connect to X manually... */
xdpy = XOpenDisplay (NULL);
if (!xdpy)
{
fprintf (stderr, "Failed to open X Display\n");
return 1;
}
/* Conceptually choose a GPU... */
renderer = cogl_renderer_new ();
/* FIXME: This should conceptually be part of the configuration of
* a renderer. */
cogl_renderer_xlib_set_foreign_display (renderer, xdpy);
if (!cogl_renderer_connect (renderer, &error))
{
fprintf (stderr, "Failed to connect to a renderer: %s\n",
error->message);
}
chain = cogl_swap_chain_new ();
cogl_swap_chain_set_has_alpha (chain, TRUE);
/* Conceptually declare upfront the kinds of windows we anticipate
* creating so that when we configure the display pipeline we can avoid
* having an impedance miss-match between the format of windows and the
* format the display pipeline expects. */
onscreen_template = cogl_onscreen_template_new (chain);
cogl_object_unref (chain);
/* Conceptually setup a display pipeline */
display = cogl_display_new (renderer, onscreen_template);
cogl_object_unref (renderer);
if (!cogl_display_setup (display, &error))
{
fprintf (stderr, "Failed to setup a display pipeline: %s\n",
error->message);
return 1;
}
ctx = cogl_context_new (display, &error);
if (!ctx)
{
fprintf (stderr, "Failed to create context: %s\n", error->message);
return 1;
}
/* Eventually we want to get rid of any "default context" but for now it's
* needed... */
cogl_set_default_context (ctx);
onscreen = cogl_onscreen_new (ctx, 640, 480);
/* We want to test that Cogl can handle foreign X windows... */
visual = cogl_onscreen_x11_get_visual_xid (onscreen);
if (!visual)
{
fprintf (stderr, "Failed to query an X visual suitable for the "
"configured CoglOnscreen framebuffer\n");
return 1;
}
template.visualid = visual;
xvisinfo = XGetVisualInfo (xdpy, VisualIDMask, &template, &visinfos_count);
/* window attributes */
xattr.background_pixel = WhitePixel (xdpy, DefaultScreen (xdpy));
xattr.border_pixel = 0;
xattr.colormap = XCreateColormap (xdpy,
DefaultRootWindow (xdpy),
xvisinfo->visual,
AllocNone);
mask = CWBorderPixel | CWColormap;
xwin = XCreateWindow (xdpy,
DefaultRootWindow (xdpy),
0, 0,
800, 600,
0,
xvisinfo->depth,
InputOutput,
xvisinfo->visual,
mask, &xattr);
XFree (xvisinfo);
cogl_onscreen_x11_set_foreign_window_xid (onscreen, xwin);
fb = COGL_FRAMEBUFFER (onscreen);
/* Eventually there will be an implicit allocate on first use so this
* will become optional... */
if (!cogl_framebuffer_allocate (fb, &error))
{
fprintf (stderr, "Failed to allocate framebuffer: %s\n", error->message);
return 1;
}
XMapWindow (xdpy, xwin);
cogl_push_framebuffer (fb);
cogl_set_source_color4f (1, 0, 0, 1);
for (;;)
{
cogl_rectangle (-1, 1, 1, -1);
cogl_framebuffer_swap_buffers (fb);
}
return 0;
}