1 files changed, 110 insertions, 0 deletions
diff --git a/src/gpu/GrGLRenderTarget.h b/src/gpu/GrGLRenderTarget.h
new file mode 100644
index 0000000..eb817df
--- /dev/null
+++ b/src/gpu/GrGLRenderTarget.h
@@ -0,0 +1,110 @@
+
+/*
+ * 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 GrGLRenderTarget_DEFINED
+#define GrGLRenderTarget_DEFINED
+
+#include "GrGLIRect.h"
+#include "GrRenderTarget.h"
+#include "GrScalar.h"
+
+class GrGpuGL;
+class GrGLTexture;
+class GrGLTexID;
+
+class GrGLRenderTarget : public GrRenderTarget {
+
+public:
+    // set fTexFBOID to this value to indicate that it is multisampled but
+    // Gr doesn't know how to resolve it.
+    enum { kUnresolvableFBOID = 0 };
+
+    struct Desc {
+        GrGLuint      fRTFBOID;
+        GrGLuint      fTexFBOID;
+        GrGLuint      fMSColorRenderbufferID;
+        bool          fOwnIDs;
+        GrPixelConfig fConfig;
+        int           fSampleCnt;
+    };
+
+    // creates a GrGLRenderTarget associated with a texture
+    GrGLRenderTarget(GrGpuGL*          gpu,
+                     const Desc&       desc,
+                     const GrGLIRect&  viewport,
+                     GrGLTexID*        texID,
+                     GrGLTexture*      texture);
+
+    // creates an independent GrGLRenderTarget
+    GrGLRenderTarget(GrGpuGL*          gpu,
+                     const Desc&       desc,
+                     const GrGLIRect&  viewport);
+
+    virtual ~GrGLRenderTarget() { this->release(); }
+
+    void setViewport(const GrGLIRect& rect) { fViewport = rect; }
+    const GrGLIRect& getViewport() const { return fViewport; }
+
+    // The following two functions return the same ID when a 
+    // texture-rendertarget is multisampled, and different IDs when
+    // it is.
+    // FBO ID used to render into
+    GrGLuint renderFBOID() const { return fRTFBOID; }
+    // FBO ID that has texture ID attached.
+    GrGLuint textureFBOID() const { return fTexFBOID; }
+
+    // override of GrRenderTarget 
+    virtual intptr_t getRenderTargetHandle() const {
+        return this->renderFBOID(); 
+    }
+    virtual intptr_t getRenderTargetResolvedHandle() const {
+        return this->textureFBOID();
+    }
+    virtual ResolveType getResolveType() const {
+
+        if (!this->isMultisampled() ||
+            fRTFBOID == fTexFBOID) {
+            // catches FBO 0 and non MSAA case
+            return kAutoResolves_ResolveType;
+        } else if (kUnresolvableFBOID == fTexFBOID) {
+            return kCantResolve_ResolveType;
+        } else {
+            return kCanResolve_ResolveType;
+        }
+    }
+
+protected:
+    // override of GrResource
+    virtual void onAbandon();
+    virtual void onRelease();
+
+private:
+    GrGLuint      fRTFBOID;
+    GrGLuint      fTexFBOID;
+
+    GrGLuint      fMSColorRenderbufferID;
+
+    // Should this object delete IDs when it is destroyed or does someone
+    // else own them.
+    bool        fOwnIDs;
+
+    // when we switch to this rendertarget we want to set the viewport to
+    // only render to to content area (as opposed to the whole allocation) and
+    // we want the rendering to be at top left (GL has origin in bottom left)
+    GrGLIRect fViewport;
+
+    // non-NULL if this RT was created by Gr with an associated GrGLTexture.
+    GrGLTexID* fTexIDObj;
+
+    void init(const Desc& desc, const GrGLIRect& viewport, GrGLTexID* texID);
+
+    typedef GrRenderTarget INHERITED;
+};
+
+#endif