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Apply clang-format fixes

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Eunchurn Park 2025-12-25 00:45:43 +09:00
parent 16568932cf
commit e9ffe1a39e
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GPG Key ID: 29D94D9C697E3F92
2 changed files with 55 additions and 51 deletions
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31
lib/GfxRenderer/Bitmap.cpp
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@ -8,12 +8,12 @@
// ============================================================================
// Note: For cover images, dithering is done in JpegToBmpConverter.cpp
// This file handles BMP reading - use simple quantization to avoid double-dithering
constexpr bool USE_FLOYD_STEINBERG = false;// Disabled - dithering done at JPEG conversion
constexpr bool USE_NOISE_DITHERING = false;// Hash-based noise dithering
constexpr bool USE_FLOYD_STEINBERG = false; // Disabled - dithering done at JPEG conversion
constexpr bool USE_NOISE_DITHERING = false; // Hash-based noise dithering
// Brightness adjustments:
constexpr bool USE_BRIGHTNESS = false; // true: apply brightness/gamma adjustments
constexpr int BRIGHTNESS_BOOST = 20; // Brightness offset (0-50), only if USE_BRIGHTNESS=true
constexpr bool GAMMA_CORRECTION = false; // Gamma curve, only if USE_BRIGHTNESS=true
constexpr bool USE_BRIGHTNESS = false; // true: apply brightness/gamma adjustments
constexpr int BRIGHTNESS_BOOST = 20; // Brightness offset (0-50), only if USE_BRIGHTNESS=true
constexpr bool GAMMA_CORRECTION = false; // Gamma curve, only if USE_BRIGHTNESS=true
// ============================================================================
// Integer approximation of gamma correction (brightens midtones)
@ -71,7 +71,8 @@ static inline uint8_t quantize(int gray, int x, int y) {
// Floyd-Steinberg quantization with error diffusion and serpentine scanning
// Returns 2-bit value (0-3) and updates error buffers
static inline uint8_t quantizeFloydSteinberg(int gray, int x, int width, int16_t* errorCurRow, int16_t* errorNextRow, bool reverseDir) {
static inline uint8_t quantizeFloydSteinberg(int gray, int x, int width, int16_t* errorCurRow, int16_t* errorNextRow,
bool reverseDir) {
// Add accumulated error to this pixel
int adjusted = gray + errorCurRow[x + 1];
@ -102,16 +103,16 @@ static inline uint8_t quantizeFloydSteinberg(int gray, int x, int width, int16_t
// Distribute error to neighbors (serpentine: direction-aware)
if (!reverseDir) {
// Left to right
errorCurRow[x + 2] += (error * 7) >> 4; // Right: 7/16
errorNextRow[x] += (error * 3) >> 4; // Bottom-left: 3/16
errorNextRow[x + 1] += (error * 5) >> 4; // Bottom: 5/16
errorNextRow[x + 2] += (error) >> 4; // Bottom-right: 1/16
errorCurRow[x + 2] += (error * 7) >> 4; // Right: 7/16
errorNextRow[x] += (error * 3) >> 4; // Bottom-left: 3/16
errorNextRow[x + 1] += (error * 5) >> 4; // Bottom: 5/16
errorNextRow[x + 2] += (error) >> 4; // Bottom-right: 1/16
} else {
// Right to left (mirrored)
errorCurRow[x] += (error * 7) >> 4; // Left: 7/16
errorNextRow[x + 2] += (error * 3) >> 4; // Bottom-right: 3/16
errorNextRow[x + 1] += (error * 5) >> 4; // Bottom: 5/16
errorNextRow[x] += (error) >> 4; // Bottom-left: 1/16
errorCurRow[x] += (error * 7) >> 4; // Left: 7/16
errorNextRow[x + 2] += (error * 3) >> 4; // Bottom-right: 3/16
errorNextRow[x + 1] += (error * 5) >> 4; // Bottom: 5/16
errorNextRow[x] += (error) >> 4; // Bottom-left: 1/16
}
return quantized;
@ -247,7 +248,7 @@ BmpReaderError Bitmap::parseHeaders() {
if (USE_FLOYD_STEINBERG) {
delete[] errorCurRow;
delete[] errorNextRow;
errorCurRow = new int16_t[width + 2](); // +2 for boundary handling
errorCurRow = new int16_t[width + 2](); // +2 for boundary handling
errorNextRow = new int16_t[width + 2]();
lastRowY = -1;
}

75
lib/JpegToBmpConverter/JpegToBmpConverter.cpp
View File

@ -16,20 +16,20 @@ struct JpegReadContext {
// ============================================================================
// IMAGE PROCESSING OPTIONS - Toggle these to test different configurations
// ============================================================================
constexpr bool USE_8BIT_OUTPUT = false; // true: 8-bit grayscale (no quantization), false: 2-bit (4 levels)
constexpr bool USE_8BIT_OUTPUT = false; // true: 8-bit grayscale (no quantization), false: 2-bit (4 levels)
// Dithering method selection (only one should be true, or all false for simple quantization):
constexpr bool USE_ATKINSON = true; // Atkinson dithering (cleaner than F-S, less error diffusion)
constexpr bool USE_FLOYD_STEINBERG = false;// Floyd-Steinberg error diffusion (can cause "worm" artifacts)
constexpr bool USE_NOISE_DITHERING = false;// Hash-based noise dithering (good for downsampling)
constexpr bool USE_ATKINSON = true; // Atkinson dithering (cleaner than F-S, less error diffusion)
constexpr bool USE_FLOYD_STEINBERG = false; // Floyd-Steinberg error diffusion (can cause "worm" artifacts)
constexpr bool USE_NOISE_DITHERING = false; // Hash-based noise dithering (good for downsampling)
// Brightness/Contrast adjustments:
constexpr bool USE_BRIGHTNESS = true; // true: apply brightness/gamma adjustments
constexpr int BRIGHTNESS_BOOST = 10; // Brightness offset (0-50)
constexpr bool GAMMA_CORRECTION = true; // Gamma curve (brightens midtones)
constexpr float CONTRAST_FACTOR = 1.15f; // Contrast multiplier (1.0 = no change, >1 = more contrast)
constexpr bool USE_BRIGHTNESS = true; // true: apply brightness/gamma adjustments
constexpr int BRIGHTNESS_BOOST = 10; // Brightness offset (0-50)
constexpr bool GAMMA_CORRECTION = true; // Gamma curve (brightens midtones)
constexpr float CONTRAST_FACTOR = 1.15f; // Contrast multiplier (1.0 = no change, >1 = more contrast)
// Pre-resize to target display size (CRITICAL: avoids dithering artifacts from post-downsampling)
constexpr bool USE_PRESCALE = true; // true: scale image to target size before dithering
constexpr int TARGET_MAX_WIDTH = 480; // Max width for cover images (portrait display width)
constexpr int TARGET_MAX_HEIGHT = 800; // Max height for cover images (portrait display height)
constexpr bool USE_PRESCALE = true; // true: scale image to target size before dithering
constexpr int TARGET_MAX_WIDTH = 480; // Max width for cover images (portrait display width)
constexpr int TARGET_MAX_HEIGHT = 800; // Max height for cover images (portrait display height)
// ============================================================================
// Integer approximation of gamma correction (brightens midtones)
@ -162,12 +162,12 @@ class AtkinsonDitherer {
int error = (adjusted - quantizedValue) >> 3; // error/8
// Distribute 1/8 to each of 6 neighbors
errorRow0[x + 3] += error; // Right
errorRow0[x + 4] += error; // Right+1
errorRow1[x + 1] += error; // Bottom-left
errorRow1[x + 2] += error; // Bottom
errorRow1[x + 3] += error; // Bottom-right
errorRow2[x + 2] += error; // Two rows down
errorRow0[x + 3] += error; // Right
errorRow0[x + 4] += error; // Right+1
errorRow1[x + 1] += error; // Bottom-left
errorRow1[x + 2] += error; // Bottom
errorRow1[x + 3] += error; // Bottom-right
errorRow2[x + 2] += error; // Two rows down
return quantized;
}
@ -204,7 +204,7 @@ class AtkinsonDitherer {
class FloydSteinbergDitherer {
public:
FloydSteinbergDitherer(int width) : width(width), rowCount(0) {
errorCurRow = new int16_t[width + 2](); // +2 for boundary handling
errorCurRow = new int16_t[width + 2](); // +2 for boundary handling
errorNextRow = new int16_t[width + 2]();
}
@ -328,8 +328,8 @@ void writeBmpHeader8bit(Print& bmpOut, const int width, const int height) {
bmpOut.write('B');
bmpOut.write('M');
write32(bmpOut, fileSize);
write32(bmpOut, 0); // Reserved
write32(bmpOut, 14 + 40 + paletteSize); // Offset to pixel data
write32(bmpOut, 0); // Reserved
write32(bmpOut, 14 + 40 + paletteSize); // Offset to pixel data
// DIB Header (BITMAPINFOHEADER - 40 bytes)
write32(bmpOut, 40);
@ -339,10 +339,10 @@ void writeBmpHeader8bit(Print& bmpOut, const int width, const int height) {
write16(bmpOut, 8); // Bits per pixel (8 bits)
write32(bmpOut, 0); // BI_RGB (no compression)
write32(bmpOut, imageSize);
write32(bmpOut, 2835); // xPixelsPerMeter (72 DPI)
write32(bmpOut, 2835); // yPixelsPerMeter (72 DPI)
write32(bmpOut, 256); // colorsUsed
write32(bmpOut, 256); // colorsImportant
write32(bmpOut, 2835); // xPixelsPerMeter (72 DPI)
write32(bmpOut, 2835); // yPixelsPerMeter (72 DPI)
write32(bmpOut, 256); // colorsUsed
write32(bmpOut, 256); // colorsImportant
// Color Palette (256 grayscale entries x 4 bytes = 1024 bytes)
for (int i = 0; i < 256; i++) {
@ -481,9 +481,8 @@ bool JpegToBmpConverter::jpegFileToBmpStream(File& jpegFile, Print& bmpOut) {
scaleY_fp = (static_cast<uint32_t>(imageInfo.m_height) << 16) / outHeight;
needsScaling = true;
Serial.printf("[%lu] [JPG] Pre-scaling %dx%d -> %dx%d (fit to %dx%d)\n", millis(),
imageInfo.m_width, imageInfo.m_height, outWidth, outHeight,
TARGET_MAX_WIDTH, TARGET_MAX_HEIGHT);
Serial.printf("[%lu] [JPG] Pre-scaling %dx%d -> %dx%d (fit to %dx%d)\n", millis(), imageInfo.m_width,
imageInfo.m_height, outWidth, outHeight, TARGET_MAX_WIDTH, TARGET_MAX_HEIGHT);
}
// Write BMP header with output dimensions
@ -538,15 +537,15 @@ bool JpegToBmpConverter::jpegFileToBmpStream(File& jpegFile, Print& bmpOut) {
// For scaling: accumulate source rows into scaled output rows
// We need to track which source Y maps to which output Y
// Using fixed-point: srcY_fp = outY * scaleY_fp (gives source Y in 16.16 format)
uint32_t* rowAccum = nullptr; // Accumulator for each output X (32-bit for larger sums)
uint16_t* rowCount = nullptr; // Count of source pixels accumulated per output X
int currentOutY = 0; // Current output row being accumulated
uint32_t nextOutY_srcStart = 0; // Source Y where next output row starts (16.16 fixed point)
uint32_t* rowAccum = nullptr; // Accumulator for each output X (32-bit for larger sums)
uint16_t* rowCount = nullptr; // Count of source pixels accumulated per output X
int currentOutY = 0; // Current output row being accumulated
uint32_t nextOutY_srcStart = 0; // Source Y where next output row starts (16.16 fixed point)
if (needsScaling) {
rowAccum = new uint32_t[outWidth]();
rowCount = new uint16_t[outWidth]();
nextOutY_srcStart = scaleY_fp; // First boundary is at scaleY_fp (source Y for outY=1)
nextOutY_srcStart = scaleY_fp; // First boundary is at scaleY_fp (source Y for outY=1)
}
// Process MCUs row-by-row and write to BMP as we go (top-down)
@ -633,8 +632,10 @@ bool JpegToBmpConverter::jpegFileToBmpStream(File& jpegFile, Print& bmpOut) {
const int bitOffset = 6 - ((x * 2) % 8);
rowBuffer[byteIndex] |= (twoBit << bitOffset);
}
if (atkinsonDitherer) atkinsonDitherer->nextRow();
else if (fsDitherer) fsDitherer->nextRow();
if (atkinsonDitherer)
atkinsonDitherer->nextRow();
else if (fsDitherer)
fsDitherer->nextRow();
}
bmpOut.write(rowBuffer, bytesPerRow);
} else {
@ -694,8 +695,10 @@ bool JpegToBmpConverter::jpegFileToBmpStream(File& jpegFile, Print& bmpOut) {
const int bitOffset = 6 - ((x * 2) % 8);
rowBuffer[byteIndex] |= (twoBit << bitOffset);
}
if (atkinsonDitherer) atkinsonDitherer->nextRow();
else if (fsDitherer) fsDitherer->nextRow();
if (atkinsonDitherer)
atkinsonDitherer->nextRow();
else if (fsDitherer)
fsDitherer->nextRow();
}
bmpOut.write(rowBuffer, bytesPerRow);