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minimacplus
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Rework to macro-defined scale factor

This commit is contained in:
Jeroen Domburg 2017-05-29 15:11:32 +08:00
parent 17cd87e758
commit 37df583ec8
1 changed files with 8 additions and 6 deletions
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14
components/tme-esp32/mipi_lcd.c
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@ -196,21 +196,23 @@ int findMacVal(uint8_t *data, int x, int y) {
//
// Due to the weird buildup, a horizontal subpixel actually is 1/3rd real pixel wide!
#define SCALE_FACT 51 //Floating-point number, actually x/32. Divide mac reso by this to get lcd reso.
int findPixelVal(uint8_t *data, int x, int y) {
int sx=(x*51); //32th is 512/320 -> scale 512 mac screen to 320 width
int sy=(y*51);
int sx=(x*SCALE_FACT); //32th is 512/320 -> scale 512 mac screen to 320 width
int sy=(y*SCALE_FACT);
//sx and sy are now 27.5 fixed point values for the 'real' mac-like components
int r,g,b;
if (((x+y)&1)) {
//pixel a
r=findMacVal(data, sx, sy);
b=findMacVal(data, sx+(51/3)*2, sy);
g=findMacVal(data, sx+(51/3), sy+(51/2));
b=findMacVal(data, sx+(SCALE_FACT/3)*2, sy);
g=findMacVal(data, sx+(SCALE_FACT/3), sy+(SCALE_FACT/2));
} else {
//pixel b
r=findMacVal(data, sx, sy+10);
b=findMacVal(data, sx+(51/3)*2, sy+(51/1));
g=findMacVal(data, sx+(51/3), sy);
b=findMacVal(data, sx+(SCALE_FACT/3)*2, sy+(SCALE_FACT/1));
g=findMacVal(data, sx+(SCALE_FACT/3), sy);
}
return ((r>>5)<<0)|((g>>4)<<5)|((b>>5)<<11);
}