c1fad16e10
## Summary * **What is the goal of this PR?** Implements a take-screenshot feature * **What changes are included?** - Quick press Power button and Down button at the same time to take a screenshot - Screenshots are saved in `screenshots` folder ## Additional Context - Currently it does not use the device orientation. --- Example screenshots:  [screenshot-6771.bmp](https://github.com/user-attachments/files/25157071/screenshot-6771.bmp)  [screenshot-14158.bmp](https://github.com/user-attachments/files/25157073/screenshot-14158.bmp) ### AI Usage Did you use AI tools to help write this code? _** YES --------- Co-authored-by: Eliz Kilic <elizk@google.com> Co-authored-by: Xuan Son Nguyen <son@huggingface.co> Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com> Co-authored-by: Arthur Tazhitdinov <lisnake@gmail.com>
104 lines
2.3 KiB
C++
104 lines
2.3 KiB
C++
#pragma once
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#include <HalStorage.h>
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#include <cstdint>
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#include "BitmapHelpers.h"
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#pragma pack(push, 1)
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struct BmpHeader {
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struct {
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uint16_t bfType;
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uint32_t bfSize;
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uint16_t bfReserved1;
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uint16_t bfReserved2;
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uint32_t bfOffBits;
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} fileHeader;
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struct {
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uint32_t biSize;
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int32_t biWidth;
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int32_t biHeight;
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uint16_t biPlanes;
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uint16_t biBitCount;
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uint32_t biCompression;
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uint32_t biSizeImage;
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int32_t biXPelsPerMeter;
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int32_t biYPelsPerMeter;
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uint32_t biClrUsed;
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uint32_t biClrImportant;
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} infoHeader;
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struct RgbQuad {
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uint8_t rgbBlue;
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uint8_t rgbGreen;
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uint8_t rgbRed;
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uint8_t rgbReserved;
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};
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RgbQuad colors[2];
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};
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#pragma pack(pop)
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enum class BmpReaderError : uint8_t {
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Ok = 0,
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FileInvalid,
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SeekStartFailed,
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NotBMP,
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DIBTooSmall,
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BadPlanes,
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UnsupportedBpp,
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UnsupportedCompression,
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BadDimensions,
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ImageTooLarge,
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PaletteTooLarge,
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SeekPixelDataFailed,
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BufferTooSmall,
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OomRowBuffer,
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ShortReadRow,
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};
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class Bitmap {
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public:
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static const char* errorToString(BmpReaderError err);
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explicit Bitmap(FsFile& file, bool dithering = false) : file(file), dithering(dithering) {}
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~Bitmap();
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BmpReaderError parseHeaders();
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BmpReaderError readNextRow(uint8_t* data, uint8_t* rowBuffer) const;
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BmpReaderError rewindToData() const;
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int getWidth() const { return width; }
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int getHeight() const { return height; }
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bool isTopDown() const { return topDown; }
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bool hasGreyscale() const { return bpp > 1; }
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int getRowBytes() const { return rowBytes; }
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bool is1Bit() const { return bpp == 1; }
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uint16_t getBpp() const { return bpp; }
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private:
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static uint16_t readLE16(FsFile& f);
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static uint32_t readLE32(FsFile& f);
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FsFile& file;
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bool dithering = false;
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int width = 0;
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int height = 0;
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bool topDown = false;
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uint32_t bfOffBits = 0;
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uint16_t bpp = 0;
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uint32_t colorsUsed = 0;
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bool nativePalette = false; // true if all palette entries map to native gray levels
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int rowBytes = 0;
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uint8_t paletteLum[256] = {};
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// Dithering state (mutable for const methods)
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mutable int16_t* errorCurRow = nullptr;
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mutable int16_t* errorNextRow = nullptr;
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mutable int prevRowY = -1; // Track row progression for error propagation
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mutable AtkinsonDitherer* atkinsonDitherer = nullptr;
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mutable FloydSteinbergDitherer* fsDitherer = nullptr;
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};
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