mirror of
https://github.com/daveallie/crosspoint-reader.git
synced 2026-02-05 07:07:38 +03:00
374f1a1106
- Refactored Bitmap class to improve memory management and streamline methods. - Introduced ThemeEngine with foundational classes for UI elements, layout management, and theme parsing. - Added support for dynamic themes and improved rendering capabilities in the HomeActivity and settings screens. This update lays the groundwork for a more flexible theming system, allowing for easier customization and management of UI elements across the application.
88 lines
2.1 KiB
C++
88 lines
2.1 KiB
C++
#pragma once
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#include <SdFat.h>
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#include <cstdint>
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#include "BitmapHelpers.h"
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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)
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: file(&file), dithering(dithering) {}
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explicit Bitmap(const uint8_t *buffer, size_t size, bool dithering = false)
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: file(nullptr), memoryBuffer(buffer), memorySize(size),
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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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// Getters
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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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// Internal IO helpers
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int readByte() const;
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size_t readBytes(void *buf, size_t count) const;
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bool seekSet(uint32_t pos) const;
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bool seekCur(int32_t offset) const; // Only needed for skip?
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uint16_t readLE16();
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uint32_t readLE32();
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// Source (one is valid)
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FsFile *file = nullptr;
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const uint8_t *memoryBuffer = nullptr;
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size_t memorySize = 0;
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mutable size_t bufferPos = 0;
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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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int rowBytes = 0;
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uint8_t paletteLum[256] = {};
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// Floyd-Steinberg 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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