1 files changed, 63 insertions, 0 deletions
diff --git a/include/gpu/gl/SkGLContext.h b/include/gpu/gl/SkGLContext.h
new file mode 100644
index 0000000..542d1bb
--- /dev/null
+++ b/include/gpu/gl/SkGLContext.h
@@ -0,0 +1,63 @@
+
+/*
+ * Copyright 2011 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+#ifndef SkGLContext_DEFINED
+#define SkGLContext_DEFINED
+
+#include "GrGLInterface.h"
+#include "SkString.h"
+
+/**
+ * Create an offscreen opengl context with an RGBA8 / 8bit stencil FBO.
+ * Provides a GrGLInterface struct of function pointers for the context.
+ */
+
+class SkGLContext : public SkRefCnt {
+public:
+    SkGLContext();
+    virtual ~SkGLContext();
+
+    /**
+     * Initializes the context and makes it current.
+     */
+    bool init(const int width, const int height);
+
+    int getFBOID() const { return fFBO; }
+
+    const GrGLInterface* gl() const { return fGL; }
+
+    virtual void makeCurrent() const = 0;
+
+    bool hasExtension(const char* extensionName) const;
+
+protected:
+    /**
+     * Subclass implements this to make a GL context. The returned GrGLInterface 
+     * should be populated with functions compatible with the context. The 
+     * format and size of backbuffers does not matter since an FBO will be
+     * created.
+     */
+    virtual const GrGLInterface* createGLContext() = 0;
+
+    /**
+     * Subclass should destroy the underlying GL context.
+     */
+    virtual void destroyGLContext() = 0;
+
+private:
+    SkString fExtensionString;
+    GrGLuint fFBO;
+    const GrGLInterface* fGL;
+};
+
+/**
+ * Helper macro for using the GL context through the GrGLInterface. Example:
+ * SK_GL(glCtx, GenTextures(1, &texID));
+ */
+#define SK_GL(ctx, X) (ctx).gl()->f ## X
+
+#endif