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2 |
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3 | #ifndef _PIMAGE_H
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4 | #define _PIMAGE_H
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5 |
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6 | class Adafruit_GFX;
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7 |
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8 | #if defined(__SD_H__) // Arduino SD library
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9 |
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10 |
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11 | /// This class mimics Processing's PImage, but with fewer
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12 | /// capabilities. It allows an image stored in the SD card to be
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13 | /// drawn to the display.
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14 | /// @author Enrico Gueli <enrico.gueli@gmail.com>
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15 | class PImage {
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16 | public:
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17 | PImage() :
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18 | _valid(false),
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19 | _bmpWidth(0),
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20 | _bmpHeight(0) { }
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21 |
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22 | void draw(Adafruit_GFX & glcd, int16_t x, int16_t y);
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23 |
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24 | static PImage loadImage(const char * fileName);
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25 |
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26 | void close() { _bmpFile.close(); }
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27 |
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28 | bool isValid() { return _valid; }
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29 |
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30 | int width() { return _bmpWidth; }
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31 | int height() { return _bmpHeight; }
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32 |
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33 | private:
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34 | friend class Adafruit_GFX;
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35 |
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36 | File _bmpFile;
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37 | int _bmpWidth, _bmpHeight; // W+H in pixels
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38 | uint8_t _bmpDepth; // Bit depth (currently must be 24)
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39 | uint32_t _bmpImageoffset; // Start of image data in file
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40 | uint32_t _rowSize; // Not always = bmpWidth; may have padding
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41 | bool _flip;
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42 |
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43 | bool _valid;
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44 |
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45 | PImage(File & bmpFile, int bmpWidth, int bmpHeight, uint8_t bmpDepth, uint32_t bmpImageoffset, uint32_t rowSize, bool flip) :
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46 | _bmpFile(bmpFile),
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47 | _bmpWidth(bmpWidth),
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48 | _bmpHeight(bmpHeight),
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49 | _bmpDepth(bmpDepth),
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50 | _bmpImageoffset(bmpImageoffset),
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51 | _rowSize(rowSize),
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52 | _flip(flip),
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53 | _valid(true) // since Adafruit_GFX is friend, we could just let it write the variables and save some CPU cycles
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54 | { }
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55 |
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56 | static uint16_t read16(File f);
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57 | static uint32_t read32(File f);
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58 |
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59 | // TODO close the file in ~PImage and PImage(const PImage&)
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60 |
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61 | };
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62 |
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63 | #endif
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64 |
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65 | #endif // _PIMAGE_H
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