mirror of
https://github.com/OpenEPaperLink/OpenEPaperLink.git
synced 2026-03-22 09:07:00 +01:00
ea7a76be89
still some work to do: - 1.54" img url breaks communication with the tag_fw... why??? - generate canvas from raw on webpage - dithering in spr2buffer
37 lines
819 B
C
37 lines
819 B
C
#include <Arduino.h>
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#include <TFT_eSPI.h>
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#pragma once
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struct BitmapFileHeader {
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uint8_t sig[2];
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uint32_t fileSz;
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uint8_t rfu[4];
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uint32_t dataOfst;
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uint32_t headerSz; //40
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int32_t width;
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int32_t height;
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uint16_t colorplanes; //must be one
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uint16_t bpp;
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uint32_t compression;
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uint32_t dataLen; //may be 0
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uint32_t pixelsPerMeterX;
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uint32_t pixelsPerMeterY;
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uint32_t numColors; //if zero, assume 2^bpp
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uint32_t numImportantColors;
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} __attribute__((packed));
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enum EinkClut {
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EinkClutTwoBlacks = 0,
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EinkClutTwoBlacksAndRed,
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EinkClutFourBlacks,
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EinkClutThreeBlacksAndRed,
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};
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void spr2grays(TFT_eSprite &spr, long w, long h, String &fileout);
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void spr2buffer(TFT_eSprite &spr, String &fileout);
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void jpg2buffer(String filein, String fileout);
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void bmp2grays(String filein, String fileout);
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