1 files changed, 73 insertions, 0 deletions
diff --git a/tools/fiddle/egl_context.cpp b/tools/fiddle/egl_context.cpp
new file mode 100644
index 0000000000..cbab44cb37
--- /dev/null
+++ b/tools/fiddle/egl_context.cpp
@@ -0,0 +1,73 @@
+/*
+ * Copyright 2017 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "fiddle_main.h"
+
+#include <EGL/egl.h>
+
+static const EGLint configAttribs[] = {
+    EGL_SURFACE_TYPE, EGL_PBUFFER_BIT,
+    EGL_BLUE_SIZE, 8,
+    EGL_GREEN_SIZE, 8,
+    EGL_RED_SIZE, 8,
+    EGL_DEPTH_SIZE, 8,
+    EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT,
+    EGL_NONE
+};
+
+static const int pbufferWidth = 9;
+static const int pbufferHeight = 9;
+
+static const EGLint pbufferAttribs[] = {
+    EGL_WIDTH, pbufferWidth,
+    EGL_HEIGHT, pbufferHeight,
+    EGL_NONE,
+};
+
+// create_grcontext implementation for EGL.
+sk_sp<GrContext> create_grcontext() {
+    EGLDisplay eglDpy = eglGetDisplay(EGL_DEFAULT_DISPLAY);
+    if (EGL_NO_DISPLAY == eglDpy) {
+        return nullptr;
+    }
+
+    EGLint major, minor;
+    if (EGL_TRUE != eglInitialize(eglDpy, &major, &minor)) {
+        return nullptr;
+    }
+
+    EGLint numConfigs;
+    EGLConfig eglCfg;
+    if (EGL_TRUE != eglChooseConfig(eglDpy, configAttribs, &eglCfg, 1, &numConfigs)) {
+        return nullptr;
+    }
+
+    EGLSurface eglSurf = eglCreatePbufferSurface(eglDpy, eglCfg, pbufferAttribs);
+    if (EGL_NO_SURFACE == eglSurf) {
+        return nullptr;
+    }
+
+    if (EGL_TRUE != eglBindAPI(EGL_OPENGL_API)) {
+        return nullptr;
+    }
+
+    EGLContext eglCtx = eglCreateContext(eglDpy, eglCfg, EGL_NO_CONTEXT, NULL);
+    if (EGL_NO_CONTEXT == eglCtx) {
+        return nullptr;
+    }
+    if (EGL_FALSE == eglMakeCurrent(eglDpy, eglSurf, eglSurf, eglCtx)) {
+        return nullptr;
+    }
+
+    auto interface = GrGLCreateNativeInterface();
+    if (!interface) {
+        return nullptr;
+    }
+    eglTerminate(eglDpy);
+
+    return sk_sp<GrContext>(GrContext::Create(kOpenGL_GrBackend, (GrBackendContext)interface));
+}