Move GL-specific source code to make room for D3D back end.

git-svn-id: http://skia.googlecode.com/svn/trunk@3165 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 68 insertions, 0 deletions

diff --git a/src/gpu/gl/GrGLContextInfo.h b/src/gpu/gl/GrGLContextInfo.h
new file mode 100644
index 0000000000..cac8959861
--- /dev/null
+++ b/src/gpu/gl/GrGLContextInfo.h
@@ -0,0 +1,68 @@
+#include "GrGLInterface.h"
+#include "GrGLSL.h"
+
+#include "SkString.h"
+
+/**
+ * Encapsulates information about an OpenGL context including the GrGLInterface
+ * used to make GL calls, the OpenGL version, the GrGLBinding type of the
+ * context, and GLSL version.
+ */
+class GrGLContextInfo {
+public:
+
+    /**
+     * Default constructor, creates an uninitialized GrGLContextInfo
+     */
+    GrGLContextInfo();
+
+    /**
+     * Creates a GrGLContextInfo from a GrGLInterface and the currently
+     * bound OpenGL context accesible by the GrGLInterface.
+     */
+    GrGLContextInfo(const GrGLInterface* interface);
+
+    /**
+     * Copies a GrGLContextInfo
+     */
+    GrGLContextInfo(const GrGLContextInfo& ctx);
+
+    ~GrGLContextInfo();
+
+    /**
+     * Copies a GrGLContextInfo
+     */
+    GrGLContextInfo& operator = (const GrGLContextInfo& ctx);
+
+    /**
+     * Initializes a GrGLContextInfo from a GrGLInterface and the currently
+     * bound OpenGL context accessible by the GrGLInterface.
+     */
+    bool initialize(const GrGLInterface* interface);
+    bool isInitialized() const;
+
+    const GrGLInterface* interface() const { return fInterface; }
+    GrGLBinding binding() const { return fBindingInUse; }
+    GrGLVersion version() const { return fGLVersion; }
+    GrGLSLGeneration glslGeneration() const { return fGLSLGeneration; }
+
+    /**
+     * Checks for extension support using a cached copy of the GL_EXTENSIONS
+     * string.
+     */
+    bool hasExtension(const char* ext) const {
+        if (!this->isInitialized()) {
+            return false;
+        }
+        return GrGLHasExtensionFromString(ext, fExtensionString.c_str());
+    }
+
+private:
+    void reset();
+
+    const GrGLInterface* fInterface;
+    GrGLBinding          fBindingInUse;
+    GrGLVersion          fGLVersion;
+    GrGLSLGeneration     fGLSLGeneration;
+    SkString             fExtensionString;
+};