1 files changed, 32 insertions, 0 deletions
diff --git a/tools/fiddle/mesa_context.cpp b/tools/fiddle/mesa_context.cpp
new file mode 100644
index 0000000000..70ee62bcc8
--- /dev/null
+++ b/tools/fiddle/mesa_context.cpp
@@ -0,0 +1,32 @@
+/*
+ * 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 <GL/osmesa.h>
+
+// create_grcontext implementation for Mesa.
+sk_sp<GrContext> create_grcontext() {
+    // We just leak the OSMesaContext... the process will die soon anyway.
+    if (OSMesaContext osMesaContext = OSMesaCreateContextExt(OSMESA_BGRA, 0, 0, 0, nullptr)) {
+        static uint32_t buffer[16 * 16];
+        OSMesaMakeCurrent(osMesaContext, &buffer, GL_UNSIGNED_BYTE, 16, 16);
+    }
+
+    auto osmesa_get = [](void* ctx, const char name[]) {
+        SkASSERT(nullptr == ctx);
+        SkASSERT(OSMesaGetCurrentContext());
+        return OSMesaGetProcAddress(name);
+    };
+    sk_sp<const GrGLInterface> mesa(GrGLAssembleInterface(nullptr, osmesa_get));
+    if (!mesa) {
+        return nullptr;
+    }
+    return sk_sp<GrContext>(GrContext::Create(
+                kOpenGL_GrBackend,
+                reinterpret_cast<intptr_t>(mesa.get())));
+}