gl: Add EGL interface

Enable the EGL backend for GL.

2 files changed, 106 insertions, 0 deletions

diff --git a/boilerplate/Makefile.win32.features b/boilerplate/Makefile.win32.features
index 31bd4e06..4781d8a4 100644
--- a/boilerplate/Makefile.win32.features
+++ b/boilerplate/Makefile.win32.features
@@ -199,6 +199,14 @@ enabled_cairo_boilerplate_private += $(cairo_boilerplate_png_private)
 enabled_cairo_boilerplate_sources += $(cairo_boilerplate_png_sources)
 endif
 
+supported_cairo_boilerplate_headers += $(cairo_boilerplate_glew_headers)
+all_cairo_boilerplate_headers += $(cairo_boilerplate_glew_headers)
+all_cairo_boilerplate_private += $(cairo_boilerplate_glew_private)
+all_cairo_boilerplate_sources += $(cairo_boilerplate_glew_sources)
+enabled_cairo_boilerplate_headers += $(cairo_boilerplate_glew_headers)
+enabled_cairo_boilerplate_private += $(cairo_boilerplate_glew_private)
+enabled_cairo_boilerplate_sources += $(cairo_boilerplate_glew_sources)
+
 unsupported_cairo_boilerplate_headers += $(cairo_boilerplate_gl_headers)
 all_cairo_boilerplate_headers += $(cairo_boilerplate_gl_headers)
 all_cairo_boilerplate_private += $(cairo_boilerplate_gl_private)
diff --git a/boilerplate/cairo-boilerplate-gl.c b/boilerplate/cairo-boilerplate-gl.c
index d8e40597..59de580d 100644
--- a/boilerplate/cairo-boilerplate-gl.c
+++ b/boilerplate/cairo-boilerplate-gl.c
@@ -237,6 +237,91 @@ _cairo_boilerplate_gl_synchronize (void *closure)
     cairo_gl_surface_glfinish (gltc->surface);
 }
 
+#if CAIRO_HAS_EGL_FUNCTIONS
+typedef struct _egl_target_closure {
+    EGLDisplay dpy;
+    EGLContext ctx;
+
+    cairo_device_t *device;
+    cairo_surface_t *surface;
+} egl_target_closure_t;
+
+static void
+_cairo_boilerplate_egl_cleanup (void *closure)
+{
+    egl_target_closure_t *gltc = closure;
+
+    cairo_device_finish (gltc->device);
+    cairo_device_destroy (gltc->device);
+
+    eglDestroyContext (gltc->dpy, gltc->ctx);
+    eglMakeCurrent (gltc->dpy, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
+    eglTerminate (gltc->dpy);
+
+    free (gltc);
+}
+
+static cairo_surface_t *
+_cairo_boilerplate_egl_create_surface (const char		 *name,
+				      cairo_content_t		  content,
+				      double			  width,
+				      double			  height,
+				      double			  max_width,
+				      double			  max_height,
+				      cairo_boilerplate_mode_t	  mode,
+				      int			  id,
+				      void			**closure)
+{
+    egl_target_closure_t *gltc;
+    cairo_surface_t *surface;
+    int major, minor;
+    EGLConfig *configs;
+    EGLint numConfigs;
+
+    gltc = xcalloc (1, sizeof (gl_target_closure_t));
+    *closure = gltc;
+
+    gltc->dpy = eglGetDisplay (EGL_DEFAULT_DISPLAY);
+
+    if (! eglInitialize (gltc->dpy, &major, &minor)) {
+	free (gltc);
+	return NULL;
+    }
+
+    eglGetConfigs (gltc->dpy, NULL, 0, &numConfigs);
+    configs = xmalloc(sizeof(*configs) *numConfigs);
+    eglGetConfigs (gltc->dpy, configs, numConfigs, &numConfigs);
+
+    eglBindAPI (EGL_OPENGL_API);
+
+    gltc->ctx = eglCreateContext (gltc->dpy, configs[0], EGL_NO_CONTEXT, NULL);
+    if (gltc->ctx == EGL_NO_CONTEXT) {
+	eglTerminate (gltc->dpy);
+	free (gltc);
+	return NULL;
+    }
+
+    gltc->device = cairo_egl_device_create (gltc->dpy, gltc->ctx);
+
+    gltc->surface = surface = cairo_gl_surface_create (gltc->device,
+						       content,
+					               ceil (width),
+						       ceil (height));
+    if (cairo_surface_status (surface))
+	_cairo_boilerplate_egl_cleanup (gltc);
+
+    return surface;
+}
+
+static void
+_cairo_boilerplate_egl_synchronize (void *closure)
+{
+    egl_target_closure_t *gltc = closure;
+
+    cairo_gl_surface_glfinish (gltc->surface);
+}
+#endif
+
 static const cairo_boilerplate_target_t targets[] = {
     {
 	"gl", "gl", NULL, NULL,
@@ -272,5 +357,18 @@ static const cairo_boilerplate_target_t targets[] = {
 	_cairo_boilerplate_gl_cleanup,
 	_cairo_boilerplate_gl_synchronize
     },
+#if CAIRO_HAS_EGL_FUNCTIONS
+    {
+	"egl", "gl", NULL, NULL,
+	CAIRO_SURFACE_TYPE_GL, CAIRO_CONTENT_COLOR_ALPHA, 1,
+	"cairo_egl_device_create",
+	_cairo_boilerplate_egl_create_surface,
+	NULL, NULL,
+	_cairo_boilerplate_get_image_surface,
+	cairo_surface_write_to_png,
+	_cairo_boilerplate_egl_cleanup,
+	_cairo_boilerplate_egl_synchronize
+    },
+#endif
 };
 CAIRO_BOILERPLATE (gl, targets)