Index: src/images/bmpdecoderhelper.h |
diff --git a/src/images/bmpdecoderhelper.h b/src/images/bmpdecoderhelper.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..b448734bbc6aa1ad935ddca6aeb7da4f1016ff52 |
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+++ b/src/images/bmpdecoderhelper.h |
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+ |
+/* |
+ * Copyright 2007 The Android Open Source Project |
+ * |
+ * Use of this source code is governed by a BSD-style license that can be |
+ * found in the LICENSE file. |
+ */ |
+ |
+ |
+#ifndef IMAGE_CODEC_BMPDECODERHELPER_H__ |
+#define IMAGE_CODEC_BMPDECODERHELPER_H__ |
+ |
+/////////////////////////////////////////////////////////////////////////////// |
+// this section is my current "glue" between google3 code and android. |
+// will be fixed soon |
+ |
+#include "SkTypes.h" |
+#include <limits.h> |
+#define DISALLOW_EVIL_CONSTRUCTORS(name) |
+#define CHECK(predicate) SkASSERT(predicate) |
+typedef uint8_t uint8; |
+typedef uint32_t uint32; |
+ |
+template <typename T> class scoped_array { |
+private: |
+ T* ptr_; |
+ scoped_array(scoped_array const&); |
+ scoped_array& operator=(const scoped_array&); |
+ |
+public: |
+ explicit scoped_array(T* p = 0) : ptr_(p) {} |
+ ~scoped_array() { |
+ delete[] ptr_; |
+ } |
+ |
+ void reset(T* p = 0) { |
+ if (p != ptr_) { |
+ delete[] ptr_; |
+ ptr_ = p; |
+ } |
+ } |
+ |
+ T& operator[](int i) const { |
+ return ptr_[i]; |
+ } |
+}; |
+ |
+/////////////////////////////////////////////////////////////////////////////// |
+ |
+namespace image_codec { |
+ |
+class BmpDecoderCallback { |
+ public: |
+ BmpDecoderCallback() { } |
+ virtual ~BmpDecoderCallback() {} |
+ |
+ /** |
+ * This is called once for an image. It is passed the width and height and |
+ * should return the address of a buffer that is large enough to store |
+ * all of the resulting pixels (widht * height * 3 bytes). If it returns nullptr, |
+ * then the decoder will abort, but return true, as the caller has received |
+ * valid dimensions. |
+ */ |
+ virtual uint8* SetSize(int width, int height) = 0; |
+ |
+ private: |
+ DISALLOW_EVIL_CONSTRUCTORS(BmpDecoderCallback); |
+}; |
+ |
+class BmpDecoderHelper { |
+ public: |
+ BmpDecoderHelper() { } |
+ ~BmpDecoderHelper() { } |
+ bool DecodeImage(const char* data, |
+ size_t len, |
+ int max_pixels, |
+ BmpDecoderCallback* callback); |
+ |
+ private: |
+ DISALLOW_EVIL_CONSTRUCTORS(BmpDecoderHelper); |
+ |
+ void DoRLEDecode(); |
+ void DoStandardDecode(); |
+ void PutPixel(int x, int y, uint8 col); |
+ |
+ int GetInt(); |
+ int GetShort(); |
+ uint8 GetByte(); |
+ int CalcShiftRight(uint32 mask); |
+ int CalcShiftLeft(uint32 mask); |
+ |
+ const uint8* data_; |
+ size_t pos_; |
+ size_t len_; |
+ int width_; |
+ int height_; |
+ int bpp_; |
+ int pixelPad_; |
+ int rowPad_; |
+ scoped_array<uint8> colTab_; |
+ uint32 redBits_; |
+ uint32 greenBits_; |
+ uint32 blueBits_; |
+ int redShiftRight_; |
+ int greenShiftRight_; |
+ int blueShiftRight_; |
+ int redShiftLeft_; |
+ int greenShiftLeft_; |
+ int blueShiftLeft_; |
+ uint8* output_; |
+ bool inverted_; |
+}; |
+ |
+} // namespace |
+ |
+#endif |