mehmet gok
Fork of Silabs MemoryLCD library
Dependents: demoUI whrmDemoUI Host_Software_MAX32664GWEB_HR_EXTENDED Host_Software_MAX32664GWEC_SpO2_HR-_EXTE ... more
C++ library for Sharp Microelectronics 1.28 inch LCD TFT, LS013B7DH03, SPI bus. Forked from Silicon Labs MemoryLCD display driver.
Diff: BufferedDisplay.cpp
- Revision:
- 10:231fa7861d1f
- Parent:
- 9:2441ef131ab8
- Child:
- 12:ca0bcb4777e9
--- a/BufferedDisplay.cpp Thu Jul 30 09:01:02 2015 +0000
+++ b/BufferedDisplay.cpp Wed Aug 12 13:32:01 2015 +0000
@@ -82,13 +82,13 @@
/* Since we are dealing with 1-bit pixels, we can avoid having to do bitshift and comparison operations twice.
* Basically, do the comparison with the requested state and current state, and if it changed, do an XOR on the framebuffer pixel and set the line to dirty.
*/
- bool change = ((_pixelBuffer[((y * DISPLAY_WIDTH) + x) / DISPLAY_BUFFER_TYPE_SIZE] & (1 << (x % DISPLAY_BUFFER_TYPE_SIZE))) != ((colour & 0x01) << (x % DISPLAY_BUFFER_TYPE_SIZE)));
+ bool change = ((_pixelBuffer[((y * DISPLAY_WIDTH) + x) / DISPLAY_BUFFER_TYPE_SIZE] & (1 << (x & DISPLAY_BUFFER_TYPE_MASK))) != ((colour & 0x01) << (x & DISPLAY_BUFFER_TYPE_MASK)));
if(change) {
- /* Do XOR (no bitshifting required) */
- _pixelBuffer[((y * DISPLAY_WIDTH) + x) / DISPLAY_BUFFER_TYPE_SIZE] ^= (1 << (x % DISPLAY_BUFFER_TYPE_SIZE));
+ /* Pixel's value and requested value are different, so since it's binary, we can simply do an XOR */
+ _pixelBuffer[((y * DISPLAY_WIDTH) + x) / DISPLAY_BUFFER_TYPE_SIZE] ^= (1 << (x & DISPLAY_BUFFER_TYPE_MASK));
/* notify dirty status of this line */
- _dirtyRows[y / DISPLAY_BUFFER_TYPE_SIZE] |= (1 << (y % DISPLAY_BUFFER_TYPE_SIZE));
+ _dirtyRows[y / DISPLAY_BUFFER_TYPE_SIZE] |= (1 << (y & DISPLAY_BUFFER_TYPE_MASK));
}
}