1 files changed, 20 insertions, 1 deletions
diff --git a/libs/hwui/PixelBuffer.h b/libs/hwui/PixelBuffer.h
index 32d5417..9725a61 100644
--- a/libs/hwui/PixelBuffer.h
+++ b/libs/hwui/PixelBuffer.h
@@ -112,13 +112,25 @@ public:
     virtual uint8_t* getMappedPointer() const = 0;
 
     /**
-     * Upload the specified rectangle of this pixe buffer as a
+     * Upload the specified rectangle of this pixel buffer as a
      * GL_TEXTURE_2D texture. Calling this method will trigger
      * an unmap() if necessary.
      */
     virtual void upload(uint32_t x, uint32_t y, uint32_t width, uint32_t height, int offset) = 0;
 
     /**
+     * Upload the specified rectangle of this pixel buffer as a
+     * GL_TEXTURE_2D texture. Calling this method will trigger
+     * an unmap() if necessary.
+     *
+     * This is a convenience function provided to save callers the
+     * trouble of computing the offset parameter.
+     */
+    void upload(uint32_t x, uint32_t y, uint32_t width, uint32_t height) {
+        upload(x, y, width, height, getOffset(x, y));
+    }
+
+    /**
      * Returns the width of the render buffer in pixels.
      */
     uint32_t getWidth() const {
@@ -140,6 +152,13 @@ public:
     }
 
     /**
+     * Returns the offset of a pixel in this pixel buffer, in bytes.
+     */
+    uint32_t getOffset(uint32_t x, uint32_t y) const {
+        return (y * mWidth + x) * formatSize(mFormat);
+    }
+
+    /**
      * Returns the number of bytes per pixel in the specified format.
      *
      * Supported formats: