From: Carl Worth <cworth@cworth.org>
Date: Mon, 6 May 2013 18:30:06 +0000 (-0700)
Subject: Add support for OpenGL ES by conditionally compiling wrapper for eglSwapBuffers
X-Git-Url: https://git.cworth.org/git?p=fips;a=commitdiff_plain;h=b1570730174c0efe6431e8b032c5d408c7367a21

Add support for OpenGL ES by conditionally compiling wrapper for eglSwapBuffers

The configure script now looks for EGL/egl.h, (via pkg-config or directly),
and if present, will compile a wrapper for eglSwapBuffers.

This allows fips to report metrics for OpenGL ES programs.
---

diff --git a/Makefile.local b/Makefile.local
index 2f9b5f0..c81b076 100644
--- a/Makefile.local
+++ b/Makefile.local
@@ -85,6 +85,10 @@ libfips_srcs = \
 	glxwrap.c \
 	metrics.c
 
+ifeq ($(HAVE_EGL),Yes)
+libfips_srcs += eglwrap.c
+endif
+
 libfips_32_modules = $(libfips_srcs:.c=-32.o)
 
 libfips_64_modules = $(libfips_srcs:.c=-64.o)
diff --git a/configure b/configure
index 121aec4..a799607 100755
--- a/configure
+++ b/configure
@@ -251,18 +251,37 @@ printf "Checking for GL window-system-binding headers:\n"
 have_gl_winsys=0
 
 printf "    Checking for GL/glx.h... "
-have_glx=0
+have_glx=No
 printf "#include <GL/glx.h>\nint main(void){return 0;}\n" > glx-minimal.c
 if ${CC} -o glx-minimal glx-minimal.c ${gl_cflags} > /dev/null 2>&1
 then
     printf "Yes.\n"
     have_gl_winsys=1
-    have_glx=1
+    have_glx=Yes
 else
     printf "No.\n"
 fi
 rm -f glx-minimal glx-minimal.c
 
+printf "    Checking for GL/egl.h... "
+have_egl=No
+if pkg-config --exists egl; then
+    printf "Yes.\n"
+    have_egl=Yes
+    egl_cflags=$(pkg-config --cflags egl)
+else
+    printf "#include <GL/egl.h>\nint main(void){return 0;}\n" > egl-minimal.c
+    if ${CC} -o egl-minimal egl-minimal.c ${gl_cflags} > /dev/null 2>&1
+    then
+	printf "Yes.\n"
+	have_gl_winsys=1
+	have_egl=1
+    else
+	printf "No.\n"
+    fi
+    rm -f egl-minimal egl-minimal.c
+fi
+
 if [ $have_gl_winsys -eq 0 ]; then
     errors=$((errors + 1))
 fi
@@ -291,7 +310,7 @@ EOF
 	echo
     fi
     if [ $have_gl_winsys -eq 0 ]; then
-	echo "	OpenGL window-system-bindings header files (GL/glx.h)"
+	echo "	OpenGL window-system-bindings header files (GL/glx.h and/or GL/egl.h)"
 	echo "	http://www.mesa3d.org/"
 	echo
     fi
@@ -303,12 +322,12 @@ case a simple command will install everything you need. For example:
 On Debian and similar systems:
 
 	sudo apt-get install libtalloc-dev libelf-dev \\
-	libgl1-mesa-dev
+	libgl1-mesa-dev libgles2-mesa-dev
 
 Or on Fedora and similar systems:
 
 	sudo yum install libtalloc-devel libelf-devel \\
-	mesa-libGL-devel
+	mesa-libGL-devel mesa-libGLES-devel
 
 On other systems, similar commands can be used, but the details of the
 package names may be different.
@@ -357,8 +376,14 @@ rm -f minimal minimal.c
 
 cat <<EOF
 
-All required packages were found. You may now run the following
-commands to compile and install ${PROJECT}:
+All required packages were found.
+
+The following OpenGL window-system bindings will be supported:
+
+	GLX: ${have_glx}
+	EGL: ${have_egl}
+
+You may now run the following commands to compile and install ${PROJECT}:
 
 	make
 	sudo make install
@@ -432,14 +457,23 @@ TALLOC_LDFLAGS = ${talloc_ldflags}
 LIBELF_CFLAGS = ${libelf_cflags}
 LIBELF_LDFLAGS = ${libelf_ldflags}
 
+# Whether GLX headers are available
+HAVE_GLX = ${have_glx}
+
 # Flags needed to find GL and GLX header files (GL/gl.h and GL/glx.h)
 GL_CFLAGS = ${gl_cflags}
 
+# Whether EGL headers are available
+HAVE_EGL = ${have_egl}
+
+# Flags needed to find EGL header files (EGL/egl.h)
+EGL_CFLAGS = ${egl_cflags}
+
 # Flags needed to have linker link only to necessary libraries
 AS_NEEDED_LDFLAGS = ${as_needed_ldflags}
 
 # Combined flags for compiling and linking against all of the above
-CONFIGURE_CFLAGS = \$(TALLOC_CFLAGS) \$(LIBELF_CFLAGS) \$(GL_CFLAGS)
+CONFIGURE_CFLAGS = \$(TALLOC_CFLAGS) \$(LIBELF_CFLAGS) \$(GL_CFLAGS) \$(EGL_CFLAGS)
 CONFIGURE_LDFLAGS = \$(TALLOC_LDFLAGS) \$(LIBELF_LDFLAGS)
 EOF
 
diff --git a/eglwrap.c b/eglwrap.c
new file mode 100644
index 0000000..aaa8cb7
--- /dev/null
+++ b/eglwrap.c
@@ -0,0 +1,61 @@
+/* Copyright © 2013, Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "fips.h"
+
+#include <EGL/egl.h>
+
+#include "dlwrap.h"
+#include "metrics.h"
+
+static void *
+eglwrap_lookup (char *name)
+{
+	const char *libegl_filename = "libEGL.so.1";
+	static void *libegl_handle = NULL;
+
+	if (! libegl_handle) {
+		libegl_handle = dlwrap_real_dlopen (libegl_filename, RTLD_NOW | RTLD_DEEPBIND);
+		if (! libegl_handle) {
+			fprintf (stderr, "Error: Failed to dlopen %s\n",
+				 libegl_filename);
+			exit (1);
+		}
+	}
+
+	return dlwrap_real_dlsym (libegl_handle, name);
+}
+
+EGLBoolean
+eglSwapBuffers (EGLDisplay dpy, EGLSurface surface)
+{
+	EGLBoolean ret;
+	static typeof(&eglSwapBuffers) real_eglSwapBuffers;
+
+	if (! real_eglSwapBuffers)
+		real_eglSwapBuffers = eglwrap_lookup ("eglSwapBuffers");
+
+	ret = real_eglSwapBuffers (dpy, surface);
+
+	metrics_end_frame ();
+
+	return ret;
+}
diff --git a/glxwrap.c b/glxwrap.c
index 885f679..d7670a7 100644
--- a/glxwrap.c
+++ b/glxwrap.c
@@ -26,15 +26,15 @@
 #include <GL/glx.h>
 
 #include "dlwrap.h"
-
 #include "glwrap.h"
+#include "metrics.h"
 
 void
 glXSwapBuffers (Display *dpy, GLXDrawable drawable)
 {
 	GLWRAP_DEFER (glXSwapBuffers, dpy, drawable);
 
-	glwrap_end_frame ();
+	metrics_end_frame ();
 }
 
 
diff --git a/libfips.sym b/libfips.sym
index 65567cf..15342a5 100644
--- a/libfips.sym
+++ b/libfips.sym
@@ -35,6 +35,7 @@ global:
 	glUseProgramObjectARB;
 	glXSwapBuffers;
 	glXGetProcAddressARB;
+	eglSwapBuffers;
 local:
 	*;
 };