Add skia to the repository.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@16 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 96 insertions, 0 deletions

diff --git a/skia/include/SkWriter32.h b/skia/include/SkWriter32.h
new file mode 100644
index 0000000..66910d1
--- /dev/null
+++ b/skia/include/SkWriter32.h
@@ -0,0 +1,96 @@
+#ifndef SkWriter32_DEFINED
+#define SkWriter32_DEFINED
+
+#include "SkTypes.h"
+
+#include "SkScalar.h"
+#include "SkPoint.h"
+#include "SkRect.h"
+
+class SkStream;
+class SkWStream;
+
+class SkWriter32 : SkNoncopyable {
+public:
+    SkWriter32(size_t minSize) {
+        fMinSize = minSize;
+        fSize = 0;
+        fHead = fTail = NULL;
+    }
+    ~SkWriter32();
+
+    bool writeBool(bool value) {
+        this->writeInt(value);
+        return value;
+    }
+    
+    void writeInt(int32_t value) {
+        *(int32_t*)this->reserve(sizeof(value)) = value;
+    }
+    
+    void write8(int32_t value) {
+        *(int32_t*)this->reserve(sizeof(value)) = value & 0xFF;
+    }
+    
+    void write16(int32_t value) {
+        *(int32_t*)this->reserve(sizeof(value)) = value & 0xFFFF;
+    }
+    
+    void write32(int32_t value) {
+        *(int32_t*)this->reserve(sizeof(value)) = value;
+    }
+    
+    void writeScalar(SkScalar value) {
+        *(SkScalar*)this->reserve(sizeof(value)) = value;
+    }
+    
+    void writePoint(const SkPoint& pt) {
+        *(SkPoint*)this->reserve(sizeof(pt)) = pt;
+    }
+    
+    void writeRect(const SkRect& rect) {
+        *(SkRect*)this->reserve(sizeof(rect)) = rect;
+    }
+    
+    // write count bytes (must be a multiple of 4)
+    void writeMul4(const void* values, size_t size) {
+        SkASSERT(SkAlign4(size) == size);
+        // if we could query how much is avail in the current block, we might
+        // copy that much, and then alloc the rest. That would reduce the waste
+        // in the current block
+        memcpy(this->reserve(size), values, size);
+    }
+    
+    void writePad(const void* src, size_t size);
+    
+    // return the current offset (will always be a multiple of 4)
+    uint32_t  size() const { return fSize; }
+    void      reset();
+    uint32_t* reserve(size_t size); // size MUST be multiple of 4
+    
+    // return the address of the 4byte int at the specified offset (which must
+    // be a multiple of 4. This does not allocate any new space, so the returned
+    // address is only valid for 1 int.
+    uint32_t* peek32(size_t offset);
+    
+    // copy into a single buffer (allocated by caller). Must be at least size()
+    void flatten(void* dst) const;
+    
+    // read from the stream, and write up to length bytes. Return the actual
+    // number of bytes written.
+    size_t readFromStream(SkStream*, size_t length);
+    
+    bool writeToStream(SkWStream*);
+
+private:
+    size_t      fMinSize;
+    uint32_t    fSize;
+    
+    struct Block;
+    Block*  fHead;
+    Block*  fTail;
+    
+    Block* newBlock(size_t bytes);
+};
+
+#endif