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Delete variable pixel_before in drawGlyph() to get higher speed

This commit is contained in:
Lucy2003 2021-08-01 15:03:34 +08:00
parent 90812ea857
commit 928380e376
1 changed files with 5 additions and 17 deletions
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22
Extensions/Smooth_font.cpp
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@ -475,7 +475,6 @@ void TFT_eSPI::drawGlyph(uint16_t code)
int16_t xs = cx;
uint32_t dl = 0;
uint8_t pixel = 0;
uint8_t pixel_before = 0;
startWrite(); // Avoid slow ESP32 transaction overhead for every pixel
@ -517,25 +516,14 @@ void TFT_eSPI::drawGlyph(uint16_t code)
{
#ifdef FONT_FS_AVAILABLE
if (fs_font)
{
pixel = (!gFont.c4bpp ? pbuffer[x] : pbuffer[(x >> 1) + (x & 1)]);
pixel_before = (!gFont.c4bpp || x == 0 ? 0 : pbuffer[((x-1) >> 1) + ((x - 1) & 1)]);
}
else{
#endif
pixel = (!gFont.c4bpp ? pgm_read_byte(gPtr + gBitmap[gNum] + x + gWidth[gNum] * y)
: pgm_read_byte( gPtr + gBitmap[gNum] + (x >> 1) + (x & 1) +
((gWidth[gNum] >> 1) + (gWidth[gNum] & 1)) * y));
pixel_before = (!gFont.c4bpp || x == 0 ? 0 : pgm_read_byte( gPtr + gBitmap[gNum] + ((x -1) >> 1) +
((x -1) & 1) + ((gWidth[gNum] >> 1) + (gWidth[gNum] & 1)) * y));
#ifdef FONT_FS_AVAILABLE
}
pixel = (!gFont.c4bpp ? pbuffer[x] : pbuffer[(x >> 1)]);
else
#endif
pixel = (!gFont.c4bpp ? pgm_read_byte(gPtr + gBitmap[gNum] + x + gWidth[gNum] * y) : pgm_read_byte( gPtr + gBitmap[gNum] + (x >> 1) + ((gWidth[gNum] >> 1) + (gWidth[gNum] & 1)) * y));
//Prepare real pixel data for 4bpp mode
if(gFont.c4bpp)
{
pixel = (!(x & 1) ? (pixel & 0xf0) : ((pixel_before & 0x0f) << 4));
}
pixel = ((x & 1) ? ((pixel & 0x0f) << 4) : (pixel & 0xf0));
if (pixel)
{