mirror of
https://github.com/jam422470459/EPD-nRF52-hema213.git
synced 2025-12-06 08:32:54 +08:00
use 4-bit bitmap for emulator
This commit is contained in:
Shuanglei Tao
@@ -1,5 +1,5 @@
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CC = gcc
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CFLAGS = -Wall -O2 -IGUI -DPAGE_HEIGHT=600
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CFLAGS = -Wall -IGUI -DPAGE_HEIGHT=600
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LDFLAGS = -lgdi32 -mwindows
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SRCS = GUI/Adafruit_GFX.c GUI/u8g2_font.c GUI/fonts.c GUI/GUI.c GUI/Lunar.c emulator.c
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179
emulator.c
179
emulator.c
@@ -19,52 +19,17 @@ BOOL g_bwr_mode = TRUE; // Default to BWR mode
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time_t g_display_time;
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struct tm g_tm_time;
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// Convert bitmap data from e-paper format to Windows DIB format
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static uint8_t *convertBitmap(uint8_t *bitmap, uint16_t x, uint16_t y, uint16_t w, uint16_t h) {
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int bytesPerRow = ((w + 31) / 32) * 4; // Round up to nearest 4 bytes
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int totalSize = bytesPerRow * h;
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// Allocate memory for converted bitmap
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uint8_t *convertedBitmap = (uint8_t*)malloc(totalSize);
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if (convertedBitmap == NULL) return NULL;
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memset(convertedBitmap, 0, totalSize);
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int ePaperBytesPerRow = (w + 7) / 8; // E-paper buffer stride
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for (int row = 0; row < h; row++) {
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for (int col = 0; col < w; col++) {
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// Calculate byte and bit position in e-paper buffer
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int bytePos = row * ePaperBytesPerRow + col / 8;
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int bitPos = 7 - (col % 8); // MSB first (typical e-paper format)
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// Check if the bit is set in the e-paper buffer
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int isSet = (bitmap[bytePos] >> bitPos) & 0x01;
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// Calculate byte and bit position in Windows DIB
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int dibBytePos = row * bytesPerRow + col / 8;
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int dibBitPos = 7 - (col % 8); // MSB first for DIB too
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// Set the bit in the Windows DIB if it's set in the e-paper buffer
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if (isSet) {
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convertedBitmap[dibBytePos] |= (1 << dibBitPos);
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}
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}
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}
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return convertedBitmap;
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}
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// Add a global variable for the paint HDC
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static HDC g_paintHDC = NULL;
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// Implementation of the buffer_callback function
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void DrawBitmap(uint8_t *black, uint8_t *color, uint16_t x, uint16_t y, uint16_t w, uint16_t h) {
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HDC hdc;
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HDC hdc = g_paintHDC;
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if (!hdc) return;
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RECT clientRect;
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int scale = 1;
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// Get the device context for immediate drawing
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hdc = GetDC(g_hwnd);
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if (!hdc) return;
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// Get client area for positioning
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GetClientRect(g_hwnd, &clientRect);
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@@ -72,78 +37,94 @@ void DrawBitmap(uint8_t *black, uint8_t *color, uint16_t x, uint16_t y, uint16_t
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int drawX = (clientRect.right - BITMAP_WIDTH * scale) / 2;
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int drawY = (clientRect.bottom - BITMAP_HEIGHT * scale) / 2;
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// Create DIB for visible pixels
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// Use 4-bit approach (16 colors, but we only use 3)
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BITMAPINFO bmi;
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ZeroMemory(&bmi, sizeof(BITMAPINFO));
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bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
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bmi.bmiHeader.biWidth = w;
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bmi.bmiHeader.biHeight = -h; // Negative for top-down bitmap
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bmi.bmiHeader.biPlanes = 1;
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bmi.bmiHeader.biBitCount = 1;
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bmi.bmiHeader.biBitCount = 4; // 4 bits per pixel
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bmi.bmiHeader.biCompression = BI_RGB;
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bmi.bmiHeader.biClrUsed = 16; // 16 colors (2^4)
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uint8_t *convertedBitmap = convertBitmap(black, x, y, w, h);
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if (convertedBitmap == NULL) {
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ReleaseDC(g_hwnd, hdc);
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return;
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// Initialize all 16 palette entries to white first
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for (int i = 0; i < 16; i++) {
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bmi.bmiColors[i].rgbBlue = 255;
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bmi.bmiColors[i].rgbGreen = 255;
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bmi.bmiColors[i].rgbRed = 255;
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bmi.bmiColors[i].rgbReserved = 0;
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}
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// Set colors for black and white display
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bmi.bmiColors[0].rgbBlue = 0;
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bmi.bmiColors[0].rgbGreen = 0;
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bmi.bmiColors[0].rgbRed = 0;
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bmi.bmiColors[0].rgbReserved = 0;
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// Set specific colors for our pixel values
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// Color 0: White
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bmi.bmiColors[0].rgbBlue = 255;
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bmi.bmiColors[0].rgbGreen = 255;
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bmi.bmiColors[0].rgbRed = 255;
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bmi.bmiColors[1].rgbBlue = 255;
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bmi.bmiColors[1].rgbGreen = 255;
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bmi.bmiColors[1].rgbRed = 255;
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bmi.bmiColors[1].rgbReserved = 0;
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// Color 1: Black
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bmi.bmiColors[1].rgbBlue = 0;
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bmi.bmiColors[1].rgbGreen = 0;
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bmi.bmiColors[1].rgbRed = 0;
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// Draw the black layer
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StretchDIBits(hdc,
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drawX + x * scale, drawY + y * scale, // Destination position
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w * scale, h * scale, // Destination size
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0, 0, // Source position
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w, h, // Source size
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convertedBitmap, // Converted bitmap bits
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&bmi, // Bitmap info
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DIB_RGB_COLORS, // Usage
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SRCCOPY); // Raster operation code
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free(convertedBitmap);
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// Handle color layer if present (red in BWR displays)
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if (color) {
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// Allocate memory for converted color bitmap
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uint8_t *convertedColor = convertBitmap(color, x, y, w, h);
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if (convertedColor) {
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// Set colors for red overlay
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bmi.bmiColors[0].rgbBlue = 255;
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bmi.bmiColors[0].rgbGreen = 255;
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bmi.bmiColors[0].rgbRed = 0;
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bmi.bmiColors[0].rgbReserved = 0;
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// Color 2: Red
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bmi.bmiColors[2].rgbBlue = 0;
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bmi.bmiColors[2].rgbGreen = 0;
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bmi.bmiColors[2].rgbRed = 255;
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// Create 4-bit bitmap data
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// Each byte contains 2 pixels (4 bits each)
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int pixelsPerByte = 2;
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int bytesPerRow = ((w + pixelsPerByte - 1) / pixelsPerByte);
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// Align to DWORD boundary (4 bytes)
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bytesPerRow = ((bytesPerRow + 3) / 4) * 4;
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int totalSize = bytesPerRow * h;
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uint8_t *bitmap4bit = (uint8_t*)malloc(totalSize);
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if (!bitmap4bit) {
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return;
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}
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memset(bitmap4bit, 0, totalSize); // Initialize to white (0)
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int ePaperBytesPerRow = (w + 7) / 8;
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for (int row = 0; row < h; row++) {
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for (int col = 0; col < w; col++) {
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int bytePos = row * ePaperBytesPerRow + col / 8;
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int bitPos = 7 - (col % 8);
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bmi.bmiColors[1].rgbBlue = 0;
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bmi.bmiColors[1].rgbGreen = 0;
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bmi.bmiColors[1].rgbRed = 0;
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bmi.bmiColors[1].rgbReserved = 0;
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int blackBit = !((black[bytePos] >> bitPos) & 0x01);
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int colorBit = color ? !((color[bytePos] >> bitPos) & 0x01) : 0;
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// Draw red overlay
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StretchDIBits(hdc,
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drawX + x * scale, drawY + y * scale, // Destination position
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w * scale, h * scale, // Destination size
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0, 0, // Source position
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w, h, // Source size
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convertedColor, // Converted bitmap bits
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&bmi, // Bitmap info
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DIB_RGB_COLORS, // Usage
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SRCINVERT); // Use XOR operation to blend
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free(convertedColor);
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// Determine pixel value: 0=white, 1=black, 2=red
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uint8_t pixelValue = colorBit ? 2 : (blackBit ? 1 : 0);
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// Pack into 4-bit format
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// Each byte stores 2 pixels: [pixel0][pixel1]
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// High nibble = first pixel, low nibble = second pixel
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int bitmap4bitBytePos = row * bytesPerRow + col / pixelsPerByte;
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int isHighNibble = (col % pixelsPerByte) == 0;
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if (isHighNibble) {
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// Clear high nibble and set new value
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bitmap4bit[bitmap4bitBytePos] &= 0x0F;
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bitmap4bit[bitmap4bitBytePos] |= (pixelValue << 4);
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} else {
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// Clear low nibble and set new value
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bitmap4bit[bitmap4bitBytePos] &= 0xF0;
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bitmap4bit[bitmap4bitBytePos] |= pixelValue;
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}
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}
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}
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// Release the device context
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ReleaseDC(g_hwnd, hdc);
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// Draw the bitmap
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StretchDIBits(hdc,
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drawX + x * scale, drawY + y * scale,
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w * scale, h * scale,
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0, 0, w, h,
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bitmap4bit, &bmi,
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DIB_RGB_COLORS, SRCCOPY);
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free(bitmap4bit);
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}
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// Window procedure
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@@ -169,6 +150,9 @@ LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
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PAINTSTRUCT ps;
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HDC hdc = BeginPaint(hwnd, &ps);
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// Set the global HDC for DrawBitmap to use
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g_paintHDC = hdc;
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// Get client rect for calculations
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RECT clientRect;
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GetClientRect(hwnd, &clientRect);
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@@ -188,9 +172,12 @@ LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
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.voltage = 3.2f,
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};
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// Call DrawGUI to render the interface, passing the BWR mode
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// Call DrawGUI to render the interface
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DrawGUI(&data, DrawBitmap, g_display_mode);
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// Clear the global HDC
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g_paintHDC = NULL;
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EndPaint(hwnd, &ps);
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return 0;
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}
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