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65 lines
1.6 KiB
C++
65 lines
1.6 KiB
C++
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#ifndef _PIMAGE_H
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#define _PIMAGE_H
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class Adafruit_GFX;
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#if defined(__SD_H__) // Arduino SD library
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/// This class mimics Processing's PImage, but with fewer
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/// capabilities. It allows an image stored in the SD card to be
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/// drawn to the display.
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/// @author Enrico Gueli <enrico.gueli@gmail.com>
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class PImage {
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public:
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PImage() :
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_valid(false),
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_bmpWidth(0),
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_bmpHeight(0) { }
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void draw(Adafruit_GFX & glcd, int16_t x, int16_t y);
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static PImage loadImage(const char * fileName);
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bool isValid() { return _valid; }
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int width() { return _bmpWidth; }
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int height() { return _bmpHeight; }
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private:
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friend class Adafruit_GFX;
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File _bmpFile;
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int _bmpWidth, _bmpHeight; // W+H in pixels
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uint8_t _bmpDepth; // Bit depth (currently must be 24)
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uint32_t _bmpImageoffset; // Start of image data in file
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uint32_t _rowSize; // Not always = bmpWidth; may have padding
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bool _flip;
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bool _valid;
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PImage(File & bmpFile, int bmpWidth, int bmpHeight, uint8_t bmpDepth, uint32_t bmpImageoffset, uint32_t rowSize, bool flip) :
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_bmpFile(bmpFile),
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_bmpWidth(bmpWidth),
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_bmpHeight(bmpHeight),
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_bmpDepth(bmpDepth),
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_bmpImageoffset(bmpImageoffset),
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_rowSize(rowSize),
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_flip(flip),
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_valid(true) // since Adafruit_GFX is friend, we could just let it write the variables and save some CPU cycles
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{ }
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static uint16_t read16(File f);
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static uint32_t read32(File f);
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// TODO close the file in ~PImage and PImage(const PImage&)
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};
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#endif
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#endif // _PIMAGE_H
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