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new implementation

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JQ
2025-05-07 18:14:56 -07:00
parent 941d2d5c13
commit 94db70d511
1 changed files with 13 additions and 9 deletions
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22
src/helpers/ui/ST7789Display.cpp
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@@ -120,23 +120,27 @@ void ST7789Display::drawXbm(int x, int y, const uint8_t* bits, int w, int h) {
// Process the bitmap row by row
for (uint16_t by = 0; by < h; by++) {
// Calculate the target y-coordinates for this logical row
int y1 = startY + (int)(by * SCALE_Y);
int y2 = startY + (int)((by + 1) * SCALE_Y);
int block_h = y2 - y1;
// Scan across the row bit by bit
for (uint16_t bx = 0; bx < w; bx++) {
// Calculate the target x-coordinates for this logical column
int x1 = startX + (int)(bx * SCALE_X);
int x2 = startX + (int)((bx + 1) * SCALE_X);
int block_w = x2 - x1;
// Get the current bit
uint16_t byteOffset = (by * widthInBytes) + (bx / 8);
uint8_t bitMask = 0x80 >> (bx & 7);
bool bitSet = pgm_read_byte(bits + byteOffset) & bitMask;
// If the bit is set, draw pixels using setPixel with scaling
// If the bit is set, draw a block of pixels
if (bitSet) {
// Apply scaling - draw multiple pixels for each original bitmap pixel
for (uint16_t scaleY = 0; scaleY <= (uint16_t)SCALE_Y; scaleY++) {
for (uint16_t scaleX = 0; scaleX <= (uint16_t)SCALE_X; scaleX++) {
uint16_t pixelX = startX + (uint16_t)(bx * SCALE_X) + scaleX;
uint16_t pixelY = startY + (uint16_t)(by * SCALE_Y) + scaleY;
display.setPixel(pixelX, pixelY);
}
}
// Draw the block as a filled rectangle
display.fillRect(x1, y1, block_w, block_h);
}
}
}