check-point for gpu support in SkImage/SkSurface

git-svn-id: http://skia.googlecode.com/svn/trunk@4859 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 73 insertions, 0 deletions

diff --git a/src/image/SkImage_Gpu.cpp b/src/image/SkImage_Gpu.cpp
new file mode 100644
index 0000000000..6ccf10bfd8
--- /dev/null
+++ b/src/image/SkImage_Gpu.cpp
@@ -0,0 +1,73 @@
+/*
+ * Copyright 2012 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "SkImage_Base.h"
+#include "SkImagePriv.h"
+#include "SkBitmap.h"
+#include "SkCanvas.h"
+#include "SkData.h"
+#include "SkDataPixelRef.h"
+
+class SkImage_Gpu : public SkImage_Base {
+public:
+    static bool ValidArgs(GrContext* context,
+                          const GrPlatformTextureDesc& desc) {
+        if (0 == desc.fTextureHandle) {
+            return false;
+        }
+        if (desc.fWidth < 0 || desc.fHeight < 0) {
+            return false;
+        }
+        return true;
+    }
+
+    SkImage_Gpu(GrContext* context, const GrPlatformTextureDesc& desc);
+    virtual ~SkImage_Gpu();
+
+    virtual void onDraw(SkCanvas*, SkScalar, SkScalar, const SkPaint*) SK_OVERRIDE;
+
+private:
+    SkBitmap    fBitmap;
+
+    typedef SkImage_Base INHERITED;
+};
+
+///////////////////////////////////////////////////////////////////////////////
+
+SkImage_Gpu::SkImage_Gpu(GrContext* context, const GrPlatformTextureDesc& desc)
+        : INHERITED(desc.fWidth, desc.fHeight) {
+#if 0
+    bool isOpaque;
+    SkBitmap::Config config = SkImageInfoToBitmapConfig(info, &isOpaque);
+    
+    fBitmap.setConfig(config, info.fWidth, info.fHeight, rowBytes);
+    fBitmap.setPixelRef(SkNEW_ARGS(SkDataPixelRef, (data)))->unref();
+    fBitmap.setIsOpaque(isOpaque);
+    fBitmap.setImmutable();
+#endif
+}
+
+SkImage_Gpu::~SkImage_Gpu() {}
+
+void SkImage_Gpu::onDraw(SkCanvas* canvas, SkScalar x, SkScalar y, const SkPaint* paint) {
+    canvas->drawBitmap(fBitmap, x, y, paint);
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+SkImage* SkImage::NewRasterCopy(NewTexture(GrContext* context,
+                                           const GrPlatformTextureDesc& desc) {
+    if (NULL == context) {
+        return NULL;
+    }
+    if (!SkImage_Gpu::ValidArgs(context, desc)) {
+        return NULL;
+    }
+    
+    return SkNEW_ARGS(SkImage_Gpu, (context, desc));
+}
+