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Fixed rotation bug in drawBitmap()

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1 parent 37a860d commit 4c865e0f2971a5d67b3fd263373386799fc0308b @PaintYourDragon PaintYourDragon committed Oct 2, 2012
Showing with 6 additions and 3 deletions.
  1. +6 −3 Adafruit_GFX.cpp
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@@ -334,9 +334,12 @@ void Adafruit_GFX::fillTriangle ( int16_t x0, int16_t y0,
void Adafruit_GFX::drawBitmap(int16_t x, int16_t y,
const uint8_t *bitmap, int16_t w, int16_t h,
uint16_t color) {
- for (int16_t j=0; j<h; j++) {
- for (int16_t i=0; i<w; i++ ) {
- if (pgm_read_byte(bitmap + i + (j/8)*w) & _BV(j%8)) {
+
+ int16_t i, j, byteWidth = (w + 7) / 8;
+
+ for(j=0; j<h; j++) {
+ for(i=0; i<w; i++ ) {
+ if(pgm_read_byte(bitmap + j * byteWidth + i / 8) & _BV(i & 7)) {
drawPixel(x+i, y+j, color);
}
}

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