Diff: images/EAImage.h

Revision:

7:6cf21b018420

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/images/EAImage.h	Mon Nov 01 13:07:40 2010 +0000
@@ -0,0 +1,73 @@
+// Copyright 2010 Richard Parker
+
+#ifndef MBED_EAIMAGE_H
+#define MBED_EAIMAGE_H
+
+#include "mbed.h"
+#include <string>
+
+#include "EAWidget.h"
+
+class EALCD;
+class EAColor;
+
+/**
+ * Class to handle loading and displaying an image.
+ * @author Richard Parker
+ */
+class EAImage: public EAWidget
+{
+public:
+    struct EABMPHeader {
+        unsigned int headerSize;
+        unsigned int width;
+        unsigned int height;
+        unsigned short noColorPlanes;
+        unsigned short bitsPerPixel;
+        unsigned int compressionType;
+        unsigned int bmpSize;
+        unsigned int horizontalRes;
+        unsigned int verticalRes;
+        unsigned int noColors;
+        unsigned int noImportantColors;
+    };
+    
+    EAImage();
+    ~EAImage();
+    
+    bool load(const std::string& path);
+    void unload();
+    
+    inline const std::string& path() const { return _path; }
+    
+    inline bool isValid() const { return (_path.empty() == false); }
+    
+    virtual void paint(EALCD& lcd);
+    virtual void paint(EALCD& lcd, unsigned int x, unsigned int y, unsigned int w, unsigned int h);
+    
+    inline const EABMPHeader& info() { return _header; }
+    
+    inline bool isMask() { return _mask; }
+    inline void setMask(bool value) { _mask = value; }
+    
+private:
+    std::string _path;
+    EAColor* _palette;
+    unsigned int _dataOffset;
+    EABMPHeader _header;
+    bool _mask;
+    
+    bool _loadHeader(const string& path);
+    bool _loadPalette(FILE* fp);
+    
+    int _wordsInRow();
+    int _wordForX(unsigned int x);
+    int _xWordOffset(unsigned int x);
+    unsigned short _getColourAtOffset(unsigned int word, int offset);
+    
+    int _fseek(FILE* stream, long int offset, int origin);
+    size_t _fread(void* ptr, size_t size, size_t count, FILE* stream);
+    int _feof(FILE* stream);
+};
+
+#endif
\ No newline at end of file