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DMA used for ARGB4444 bitmaps

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This commit is contained in:
Bertrand Songis
2016-02-28 19:37:50 +01:00
parent a495885472
commit 806d547ced
4 changed files with 68 additions and 23 deletions
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radio/src/gui/horus/lcd.cpp
+18 -2
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@@ -671,10 +671,26 @@ void DMAFillRect(uint16_t * dest, uint16_t destw, uint16_t x, uint16_t y, uint16
}
}
void DMACopyBitmap(uint16_t * dest, uint16_t destw, uint16_t x, uint16_t y, const uint16_t * src, uint16_t srcw, uint16_t h)
void DMACopyBitmap(uint16_t * dest, uint16_t destw, uint16_t x, uint16_t y, const uint16_t * src, uint16_t srcw, uint16_t srcx, uint16_t srcy, uint16_t w, uint16_t h)
{
for (int i=0; i<h; i++) {
memcpy(dest+(y+i)*destw+x, src+i*srcw, 2*srcw);
memcpy(dest+(y+i)*destw+x, src+(srcy+i)*srcw+srcx, 2*w);
}
}
void DMACopyAlphaBitmap(uint16_t * dest, uint16_t destw, uint16_t x, uint16_t y, const uint16_t * src, uint16_t srcw, uint16_t h)
{
for (coord_t line=0; line<h; line++) {
uint16_t * p = dest + (y+line)*destw + x;
const uint16_t * q = src + line*srcw;
for (coord_t col=0; col<srcw; col++) {
uint8_t alpha = *q >> 12;
uint8_t red = ((((*q >> 8) & 0x0f) << 1) * alpha + (*p >> 11) * (0x0f-alpha)) / 0x0f;
uint8_t green = ((((*q >> 4) & 0x0f) << 2) * alpha + ((*p >> 5) & 0x3f) * (0x0f-alpha)) / 0x0f;
uint8_t blue = ((((*q >> 0) & 0x0f) << 1) * alpha + ((*p >> 0) & 0x1f) * (0x0f-alpha)) / 0x0f;
*p = (red << 11) + (green << 5) + (blue << 0);
p++; q++;
}
}
}
#endif