Remove SampleApp and convert HelloWorld to sk_app

There is still a large amount of views code that could be trimmed down,
but which is used to implement samples (in viewer). Seemed simpler to
remove some of this code in pieces.

Bug: skia:
Change-Id: Ia3415060d03c8de604a154e3dc38379b754daab6
Reviewed-on: https://skia-review.googlesource.com/72801
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>

1 files changed, 59 insertions, 0 deletions

diff --git a/tools/sk_app/GLWindowContext.h b/tools/sk_app/GLWindowContext.h
new file mode 100644
index 0000000000..44810c93d2
--- /dev/null
+++ b/tools/sk_app/GLWindowContext.h
@@ -0,0 +1,59 @@
+
+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+#ifndef GLWindowContext_DEFINED
+#define GLWindowContext_DEFINED
+
+
+#include "gl/GrGLInterface.h"
+
+#include "SkRefCnt.h"
+#include "SkSurface.h"
+
+#include "WindowContext.h"
+
+class GrContext;
+
+namespace sk_app {
+
+class GLWindowContext : public WindowContext {
+public:
+    sk_sp<SkSurface> getBackbufferSurface() override;
+
+    bool isValid() override { return SkToBool(fBackendContext.get()); }
+
+    void resize(int w, int h) override;
+    void swapBuffers() override;
+
+    void setDisplayParams(const DisplayParams& params) override;
+
+    GrBackendContext getBackendContext() override {
+        return (GrBackendContext) fBackendContext.get();
+    }
+
+protected:
+    GLWindowContext(const DisplayParams&);
+    // This should be called by subclass constructor. It is also called when window/display
+    // parameters change. This will in turn call onInitializeContext().
+    void initializeContext();
+    virtual sk_sp<const GrGLInterface> onInitializeContext() = 0;
+
+    // This should be called by subclass destructor. It is also called when window/display
+    // parameters change prior to initializing a new GL context. This will in turn call
+    // onDestroyContext().
+    void destroyContext();
+    virtual void onDestroyContext() = 0;
+
+    virtual void onSwapBuffers() = 0;
+
+    sk_sp<const GrGLInterface> fBackendContext;
+    sk_sp<SkSurface>           fSurface;
+};
+
+}   // namespace sk_app
+
+#endif