grab from latest android

git-svn-id: http://skia.googlecode.com/svn/trunk@27 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 55 insertions, 0 deletions

diff --git a/src/core/SkProcSpriteBlitter.cpp b/src/core/SkProcSpriteBlitter.cpp
new file mode 100644
index 0000000000..f727581e24
--- /dev/null
+++ b/src/core/SkProcSpriteBlitter.cpp
@@ -0,0 +1,55 @@
+/* libs/graphics/sgl/SkProcSpriteBlitter.cpp
+**
+** Copyright 2006, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License"); 
+** you may not use this file except in compliance with the License. 
+** You may obtain a copy of the License at 
+**
+**     http://www.apache.org/licenses/LICENSE-2.0 
+**
+** Unless required by applicable law or agreed to in writing, software 
+** distributed under the License is distributed on an "AS IS" BASIS, 
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
+** See the License for the specific language governing permissions and 
+** limitations under the License.
+*/
+
+#if 0   // experimental
+
+class SkProcSpriteBlitter : public SkSpriteBlitter {
+public:
+    typedef void (*Proc)(void* dst, const void* src, int count, const SkPMColor ctable[]);
+
+    SkProcSpriteBlitter(const SkBitmap& source, Proc proc, unsigned srcShift, unsigned dstShift)
+        : SkSpriteBlitter(source), fProc(proc), fSrcShift(SkToU8(srcShift)), fDstShift(SkToU8(dstShift)) {}
+
+    virtual void blitRect(int x, int y, int width, int height)
+    {
+        size_t      dstRB = fDevice.rowBytes();
+        size_t      srcRB = fSource.rowBytes();
+        char*       dst = (char*)fDevice.getPixels() + y * dstRB + (x << fDstShift);
+        const char* src = (const char*)fSource.getPixels() + (y - fTop) * srcRB + ((x - fLeft) << fSrcShift);
+        Proc        proc = fProc;
+        const SkPMColor* ctable = NULL;
+
+        if fSource.getColorTable())
+            ctable = fSource.getColorTable()->lockColors();
+
+        while (--height >= 0)
+        {
+            proc(dst, src, width, ctable);
+            dst += dstRB;
+            src += srcRB;
+        }
+
+        if fSource.getColorTable())
+            fSource.getColorTable()->unlockColors(false);
+    }
+
+private:
+    Proc    fProc;
+    uint8_t fSrcShift, fDstShift;
+};
+
+#endif